Note: Descriptions are shown in the official language in which they were submitted.
QUICK-CONNECT JOINT LIQUID SUPPLY VALVE, AND USE METHOD
AND QUICK COUPLING METHOD THEREOF
Technical Field
The present invention relates to a quick-connect joint liquid supply valve, a
use method and a
quick coupling method thereof, and particularly to a quick-connect joint
liquid supply valve suitable
for use in a joint liquid supply system, and a use method and a quick coupling
method thereof.
Background
With the continuous development of modernization and the continuous expansion
of the scale
of construction, hydraulic technologies are more widely applied in various
fields and are playing a
more important role. With the increasing demand for high power, high pressure,
and high flow rate,
joint liquid supply systems are continuously developing toward high pressure
and high flow rate,
which requires the use of multiple pumping stations to work together for
liquid supply. At present,
joint liquid supply systems generally adopt multiple pumping stations arranged
independently of
each other, leading to the problems that the modes of liquid supply are
limited and that the system
has a complex structure and cannot achieve joint liquid supply in a limited
space; and do not allow
for flexibly increasing or reducing the number of pumping stations for liquid
supply depending on
different working conditions.
In existing joint liquid supply technologies, a joint liquid supply system is
implemented by
using multiple pumping stations in parallel and equipping each pumping station
with hydraulic
components such as electromagnetic unloading valves and on-off valves to
realize joint liquid supply
of joint pipelines. However, because a set of hydraulic components is
installed for each pumping
station to satisfy the working parameters of the pumping station and the
liquid supply of each
pumping station also needs to be controlled separately, high design and
manufacturing costs are
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Date Recue/Date Received 2022-05-06
incurred. On the other hand, when a large number of pumping stations are
required for liquid supply,
the joint liquid supply system has a complex structure and requires a large
number of hydraulic
components, the operation is cumbersome, and the working capacity of j oint
liquid supply cannot be
achieved in a limited space. Moreover, when the working requirements are
changed, the design of
the liquid supply system cannot be changed by flexibly increasing or reducing
the number of liquid
supply pipelines, and complex disassembly and assembly operations are required
in order to meet
the new working requirements.
Summary
In order to overcome the drawbacks in the above-mentioned technologies, an
objective of the
present invention is to provide a quick-connect joint liquid supply valve
which is of a simple structure,
low costs, high control precision, and fast response speed, can use its own
structure to realize the
independent adjustment of the pressure between flow channels, the
instantaneous opening or closing
of liquid supply pipelines, and the joint liquid supply of multiple liquid
supply pipelines, and can be
quickly coupled, and a use method and a quick coupling method thereof
In order to overcome the drawbacks in the prior art, the present invention
provides a quick-
connect joint liquid supply valve, including a right valve body, a left valve
body, a pre-tightening
mechanism, a spring ball linkage mechanism, and a quick coupling plug, wherein
the left valve body
and the right valve body are combined in a left-right manner, the pre-
tightening mechanism is
arranged in the right valve body, two ends of the spring ball linkage
mechanism are arranged in the
left valve body and the right valve body respectively, and the quick coupling
plug is arranged on the
left valve body;
a lower part of the right valve body is provided with a right oil outlet
chamber, an upper part of
the right valve body is vertically provided with a pressure control valve
chamber in communication
with the right oil outlet chamber, an oil inlet communicating hole and a
rectangular connecting rod
working hole are transversely provided on a left side of the pressure control
valve chamber, the oil
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Date Recue/Date Received 2022-05-06
inlet communicating hole is located above the rectangular connecting rod
working hole, the oil inlet
communicating hole and the rectangular connecting rod working hole are both in
communication
with the pressure control valve chamber, a ball rod mounting hole is provided
in the rectangular
connecting rod working hole, a base mounting groove is provided on a left
surface of the right valve
body, a right valve body assembly positioning hole is provided with on a left
side of the right oil
outlet chamber of the right valve body, a male plug protruding rightward and
having three stepped
surfaces is provided on a right side of the right oil outlet chamber of the
right valve body, diameters
of the three stepped surfaces of the male plug having the three stepped
surfaces gradually decrease
from left to right, a middle step area of the male plug is provided with a
ball positioning groove, a
right stepped surface area of the male plug is provided with external threads
configured for threaded
connection with an external oil pipe, the male plug is provided with an oil
outlet hole in
communication with the right oil outlet chamber, a male plug top of the male
plug is provided with
a male plug top oil through hole, four transverse right valve body connection
through holes are
respectively provided at four corners of the upper part of the right valve
body, and two right valve
body positioning through holes are respectively provided at two corners of the
lower part of the right
valve body;
an upper part of the left valve body is provided with an oil inlet chamber, a
lower part of the
left valve body is provided with a left oil outlet chamber, an oil inlet
control hole configured to
communicate the oil inlet chamber with the left oil outlet chamber is provided
between the oil inlet
chamber and the left oil outlet chamber, a top of the left valve body is
provided with an oil inlet hole
in communication with the oil inlet chamber, the oil inlet hole is provided
with internal threads, and
the oil inlet chamber is in communication with an external oil source through
the oil inlet hole; a
female plug connection hole is provided on a left side of the left oil outlet
chamber, and the female
plug connection hole is provided with internal threads; a through hole is
provided on a right side of
the left oil outlet chamber, a left valve body assembly positioning boss is
arranged on an outer side
of the through hole, and a gravity cover mounting hole is arranged in the left
oil outlet chamber; the
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Date Recue/Date Received 2022-05-06
left valve body assembly positioning boss is engaged with the right valve body
assembly positioning
hole to axially position the left valve body and the right valve body; four
transverse left valve body
connection through holes are respectively provided at four corners of the oil
inlet chamber in the
upper part of the left valve body, screws are respectively fastened to nuts
through the left valve body
connection through holes and the right valve body connection through holes to
fix the left valve body
and the right valve body together; two left valve body positioning through
holes are respectively
provided at two corners above the female plug connection hole in the lower
part of the left valve
body, for use in combination with the two right valve body positioning through
holes on the right
valve body;
the pre-tightening mechanism is arranged in the pressure control valve chamber
from top to
bottom, and includes a pre-tightening rod, a pre-tightening choke plug, a pre-
tightening cylinder, and
a pre-tightening spring, and a pre-tightening cylinder cap; the pre-tightening
choke plug is provided
with a threaded through hole, an outer side of the pre-tightening choke plug
is threadedly connected
to an upper part of the pressure control valve chamber, an upper part of the
pre-tightening rod is
connected to the threaded through hole of the pre-tightening choke plug by
external threads, a lower
part of the pre-tightening rod is provided with a pre-tightening spring
mounting disc, the pretension
rod is configured to rotate and move by the external threads, the lower part
of the pre-tightening rod
is arranged in the pressure control valve chamber by arranging the pre-
tightening choke plug on the
upper part of the pressure control valve chamber, an upper part of the pre-
tightening cylinder is
provided with a pre-tightening rod through hole, an annular groove is provided
on an outer surface
of a middle part of the pre-tightening cylinder, an internal threaded section
is provided at a bottom
of the pre-tightening cylinder, the pre-tightening cylinder is connected to
the pre-tightening spring
mounting disc in the lower part of the pre-tightening rod through the pre-
tightening rod through hole,
a pre-tightening spring is sleeved between above the pre-tightening spring
mounting disc and the
pre-tightening cylinder, the external threads of the upper part of the pre-
tightening rod extend out of
the pre-tightening rod through hole, an inner upper surface of the pre-
tightening cylinder is pressed
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Date Recue/Date Received 2022-05-06
against an upper end of the pre-tightening spring, the pre-tightening cylinder
cap is a cylindrical boss
structure, and a top of the pre-tightening cylinder cap is provided with a
thread structure configured
for connection with internal threads at the bottom of the pre-tightening
cylinder;
the spring ball linkage mechanism includes a gravity cover mounting screw, a
gravity cover, a
gravity cover connecting rod, a mounting base, an eccentric cam, a ball rod, a
pin, a ball, a ball rod
head, a ball rod sleeve, and a ball rod spring; the ball rod includes an upper
segment, a middle
segment, and a lower segment, the upper segment of the ball rod is provided
with a cylindrical groove,
the middle segment and the lower segment of the ball rod are each of a
rectangular column structure,
a ball rod mounting through hole is provided on the middle segment of the ball
rod, the ball rod
mounting through hole is connected to the ball rod mounting hole of the right
valve body by the pin,
and a ball rod connecting boss is provided at an end of the lower segment of
the ball rod; the upper
segment and the middle segment of the ball rod are axially bent relative to
the lower segment of the
ball rod; an upper end of the ball rod sleeve is provided with a ball rod head
through hole; a front
end of the ball rod head is provided with a ball accommodating groove, the
ball is mounted in the
.. ball accommodating groove, and a shoulder is arranged on each of two sides
of a rear part of the ball
rod head; an upper end of the ball rod sleeve is provided with a ball rod head
through hole, the ball
rod head extends out of the ball rod head through hole on the ball rod sleeve
and is in interference fit
with the upper segment of the ball rod through a lower end of the ball rod
sleeve, the ball rod spring
is arranged between the cylindrical groove and a tail of the ball rod head,
and upper and lower ends
of the ball rod spring are respectively pressed against a lower surface of the
ball rod head and the
cylindrical groove; the eccentric cam is connected to a mounting base
connecting shaft through an
eccentric cam mounting through hole and finally mounted on the mounting base,
the mounting base
is fixed in the oil inlet chamber by engagement of a mounting base boss on one
side of the mounting
base in the base mounting groove, the eccentric cam is provided with the
eccentric cam mounting
through hole, the eccentric cam mounting through hole is connected to an
eccentric cam
synchronization connecting rod through a connecting shaft, one end of the
eccentric cam
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Date Recue/Date Received 2022-05-06
synchronization connecting rod is connected to the eccentric cam mounting
through hole of the
eccentric cam, the other end of the eccentric cam synchronization connecting
rod is provided with a
guide slot along a center line thereof, and the guide slot is fitted to the
ball rod connecting boss on
the ball rod; the gravity cover connecting rod is a frame structure arranged
around a circumference
of the eccentric cam, a T-shaped connecting rod is connected below the gravity
cover connecting rod
by a gravity cover connecting rod guide rod, the gravity cover connecting rod
guide rod is a
crankshaft structure, an earring protrusion is arranged on a lower surface of
the gravity cover, the
earring protrusion is provided with a gravity cover connecting hole, the
gravity cover connecting
hole of the gravity cover is movably connected to the gravity cover mounting
hole in the left valve
body by the gravity cover mounting screw, gravity cover rectangular slots are
arranged on an upper
surface of the gravity cover, and the gravity cover rectangular slots are
movably connected to the T-
shaped connecting rod;
the quick coupling plug includes a female plug, a switch, a switch spring, a
plug ball, an 0-ring,
a blocking piece, a choke plug spring, and a middle choke plug, and a metal
retaining ring; and the
female plug is provided with an inner hole and an outer hole, six truncated
cone-shaped through
holes with a large outer-side diameter and a smaller inner-side diameter are
provided in a
circumferential array on a wall of the outer hole, a bottom of the inner hole
is provided with internal
threads for engagement with the female plug connection hole, a blocking piece
is arranged between
the female plug connection hole and the inner hole, a plurality of oil through
holes are provided in a
center of the blocking piece, the blocking piece is fixed by threads, a switch
shoulder is arranged at
a position in an axial through hole of the switch close to an upper end of the
switch, a side surface of
the switch shoulder is pressed against the plug ball, the middle choke plug is
of a cone-shaped
structure and is arranged between the inner hole and the outer hole, the choke
plug spring is arranged
in the inner hole between the middle choke plug and the blocking piece, a tip
of the middle choke
plug is placed facing toward the outer hole, a bottom of the middle choke plug
is pressed against an
upper end of the choke plug spring and is in close contact with an upper
surface of the inner hole,
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Date Recue/Date Received 2022-05-06
the blocking piece is screwed into the inner threads on the bottom of the
inner hole to press against
a lower end of the choke plug spring, the 0-ring is mounted in a groove in the
outer hole, the plug
ball is configured to be fitted in the truncated cone-shaped through hole, the
switch is sleeved on an
outer wall of the outer hole and is pressed against the plug ball, the metal
retaining ring is mounted
in a groove on an outer surface of the outer hole, an upper surface of the
switch shoulder is pressed
against the metal retaining ring, the switch spring is mounted between the
switch and the outer wall
of the outer hole, and upper and lower ends of the switch spring are
respectively pressed against a
lower surface of the switch shoulder and a shoulder of the female plug.
The right valve body and the left valve body combined together are fixed to a
workbench.
The left valve body and the right valve body are axially positioned by
engagement of the left
valve body assembly positioning boss with the right valve body assembly
positioning hole.
The mounting base is provided with a vertical guide slot, a lower end of the
gravity cover
connecting rod is mounted in the vertical guide slot, a right surface of the
mounting base is in close
contact with the left surface of the right valve body, a lower right end of
the mounting base is
provided with a mounting base boss, the base mounting groove is provided on
the left surface of the
right valve body, and the mounting base boss is inserted into the base
mounting groove.
The inner-side diameter of the truncated cone-shaped through hole on the
female plug is smaller
than a diameter of the plug ball, and the inner-side diameter of the truncated
cone-shaped through
hole on the female plug is larger than half the diameter of the plug ball; and
the outer-side diameter
of the truncated cone-shaped through hole on the female plug is larger than
the diameter of the plug
ball.
An inner diameter of the pre-tightening spring is slightly larger than a
diameter of the pre-
tightening rod, an outer diameter of the pre-tightening spring is slightly
smaller than a diameter of
the pre-tightening spring mounting disc (74), and the diameter of the pre-
tightening spring mounting
disc is slightly smaller than an internal aperture of the pre-tightening
cylinder; a diameter of the pre-
tightening rod through hole is slightly larger than the diameter of the pre-
tightening rod, the diameter
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Date Recue/Date Received 2022-05-06
of the pre-tightening rod through hole is smaller than a diameter of a lower
step area of the pre-
tightening choke plug, and the diameter of the pre-tightening rod through hole
is smaller than the
outer diameter of the pre-tightening spring; a maximum outer diameter of the
pre-tightening cylinder
is equal to a maximum diameter of the pre-tightening cylinder cap, and the
maximum outer diameter
of the pre-tightening cylinder is equal to a diameter of the pressure control
valve chamber, so as to
divide the pressure control valve chamber into upper and lower areas not in
communication with
each other; and after the pre-tightening choke plug is mounted in the pressure
control valve chamber,
a position of a bottom of the pre-tightening cylinder cap is lower than a
lowermost position in the
rectangular connecting rod working hole and a top of the pre-tightening
cylinder cap is lower than a
highest position of the oil inlet communicating hole when a bottom of the pre-
tightening choke plug
is in contact with the pre-tightening cylinder.
An upward/downward movement of the pre-tightening cylinder drives the ball rod
to rotate
clockwise/counterclockwise; when the ball rod rotates clockwise to a lowermost
position in the
rectangular connecting rod working hole, the eccentric cam rotates clockwise
to a maximum angle
position; when the ball rod rotates counterclockwise to an uppermost position
in the rectangular
connecting rod working hole, the eccentric cam rotates counterclockwise to the
maximum angle
position; and when the eccentric cam rotates to the maximum angle position,
the gravity cover
connecting rod is moved upward/downward, to push the gravity cover to
open/close by rotating about
the pin.
An aperture of the ball accommodating groove is smaller than a diameter of the
ball rod; a
diameter of the ball rod head through hole is slightly larger than a diameter
of the ball rod head, the
diameter of the ball rod head through hole is smaller than a diameter of the
shoulder of the ball rod
head, a sum of a length of the ball rod head and a height of the ball rod
spring when fully compressed
is greater than a depth of the cylindrical groove on the upper segment of the
ball rod, the ball rod
head extends into the annular groove on the outer surface of the pre-
tightening cylinder, the ball rod
spring axially urges against a bottom of the ball rod head, and the ball in
the ball accommodating
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Date Recue/Date Received 2022-05-06
groove on the front end of the ball rod head is tangent to an inner surface of
the annular groove and
is in close contact with the inner surface of the annular groove; an outer
diameter of the ball rod
spring is slightly smaller than the diameter of the shoulder of the ball rod
head; a diameter of the ball
rod connecting boss is equal to a width of the guide slot; a diameter of the
gravity cover connecting
rod guide rod is equal to a width of the vertical guide slot; and when the
ball rod head is located at
an uppermost position in the rectangular connecting rod working hole, the
gravity cover connecting
rod pulls the gravity cover so that the gravity cover is in close contact with
an upper surface of the
left oil outlet chamber, to realize closing of the oil inlet control hole at
an upper limit position.
A working method for the quick-connect joint liquid supply valve described
above is provided,
including the following steps:
hydraulic oil entering the oil inlet chamber of the left valve body through
the oil inlet hole, and
entering an upper part of the oil inlet chamber through the oil inlet
communicating hole of the right
valve body; after pressure of the hydraulic oil rises to be greater than a sum
of hydraulic oil pressure
in a lower part of the oil inlet chamber and a pre-tightening force of the pre-
tightening spring, the
.. pre-tightening cylinder moving downward to drive the ball rod head to move
downward, and the ball
rod head driving the ball rod to rotate clockwise, to gradually compress the
ball rod spring; when the
ball rod rotates clockwise to a horizontal position, the ball rod spring
reaching a maximum
compression amount and tending to return to an original length, the ball rod
continuing to rotate
clockwise, the ball rod spring instantly springing back and pushing the ball
rod head to move
downward along an inner surface of the annular groove, and the ball rod
quickly rotating clockwise
to a lowermost position to drive the eccentric cam to rotate clockwise and
push the gravity cover
connecting rod to move downward, so that the gravity cover is pushed downward
and opened to
realize instant communication between the oil inlet chamber and the left oil
outlet chamber of the
left valve body; when the pressure of the hydraulic oil drops to below the sum
of the hydraulic oil
pressure in the lower part of the oil inlet chamber and the pre-tightening
force of the pre-tightening
spring, the pre-tightening cylinder moving upward to drive the ball rod head
to move upward, and
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Date Recue/Date Received 2022-05-06
the ball rod head driving the ball rod to rotate counterclockwise, to
gradually compress the ball rod
spring; when the ball rod rotates counterclockwise to a horizontal position,
the ball rod spring
reaching a maximum compression amount and tending to return to an original
length, the ball rod
continuing to rotate counterclockwise, the ball rod spring springing back and
pushing the ball rod
head to move upward along the inner surface of the annular groove, and the
ball rod quickly rotating
counterclockwise to an uppermost position to drive the eccentric cam to rotate
counterclockwise and
push the gravity cover connecting rod to move upward, so that the gravity
cover is pulled upward
and closed to instantly cut off the communication between the oil inlet
chamber and the left oil outlet
chamber of the left valve body.
A quick coupling method for the quick-connect joint liquid supply valve
described above is
provided, including the following steps:
turning the switch of the female plug of a first quick-connect joint liquid
supply valve rightward
to cause the plug ball to exit outward, inserting the male plug of a second
quick-connect joint liquid
supply valve into the outer hole of the female plug of the first quick-connect
joint liquid supply valve,
and as the male plug continues to be pushed toward inside of the female plug,
the plug ball being
engaged into the ball positioning groove on the male plug; at the same time,
the top of the male plug
pushing the middle choke plug inside the female plug to leave the upper
surface of the inner hole of
the female plug, so that flow channels in the male plug and the female plug
become in communication
with each other, thus completing coupling of the two quick-connect joint
liquid supply valves; at this
moment, releasing the switch, the switch spring springing back to cause the
switch to return to the
initial position, and the switch shoulder being pressed against the plug ball,
so that the plug ball
cannot automatically exit from the ball positioning groove, thus completing
coupling and fixing of
the two quick-connect joint liquid supply valves; after the coupling is
completed, turning the switch
of the female plug of the first quick-connect joint liquid supply valve
rightward to cause the switch
shoulder to leave the plug ball, the plug ball exiting from the ball
positioning groove, the compressed
choke plug spring pushing the middle choke plug to approach the upper surface
of the inner hole of
Date Recue/Date Received 2022-05-06
the female plug, and the middle choke plug being pressed against the top of
the male plug to push
the male plug to exit from the outer hole of the female plug, to complete
separation of the two quick-
connect joint liquid supply valves.
Beneficial effects:
The present invention provides a quick-connect joint liquid supply valve,
which is composed of
easy-to-process mechanical structures, connecting rods, and standard parts,
and therefore has a
simple structure and requires low costs. The pressure adjustment structure is
based on the classic
formulas of hydraulic pressure and spring tension, and therefore has a clear
working mechanism,
high control accuracy, and fast response speed. The gravity cover is
automatically opened or closed
according to the pressure variation, to allow or not allow joint liquid
supply, thereby realizing the
automatic adjustment of the pressure in the valve.
When the pressure in the oil inlet chamber is greater than the sum of the pre-
tightening force of
the pre-tightening spring in the pre-tightening mechanism and the pressure in
the right oil outlet
chamber below the pre-tightening mechanism, the pre-tightening cylinder moves
downward, and
drives the spring ball linkage mechanism to rotate clockwise. In the process
of rotation, the ball rod
spring is compressed. When the spring ball linkage mechanism rotates to a
horizontal limit position,
due to the spring force of the ball rod spring and the tendency of the spring
ball linkage mechanism
to continue to rotate clockwise, the spring ball linkage mechanism will
quickly move to the limit
position to open the gravity cover under the action of the spring force. When
there is a need to
increase the liquid supply flow or reduce the liquid supply flow, joint liquid
supply can be quickly
provided for the hydraulic system or the volume of liquid supply can be
quickly reduced, thereby
reducing the waiting time. The quick coupling plug mechanism equipped on the
valve body allows
for the flexible and quick coupling of any number of liquid supply pipelines
for joint liquid supply,
and can realize joint liquid supply of multiple hydraulic pumping stations in
hydraulic systems
requiring high pressure and high flow rate. Multiple quick-connect joint
liquid supply valves of the
present invention may be coupled together to satisfy the use of multiple
pumping stations for joint
liquid supply. In addition, because the quick-connect joint liquid supply
valves of the present
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Date Recue/Date Received 2022-05-06
invention have a small volume and can be flexibly and tightly assembled with
each other, the
problems of a large number of hydraulic components, occupation of much space,
and complex
disassembly and assembly operations of the prior art are solved.
Brief Description of the Drawings
FIG. 1 is a schematic cross-sectional structural view of a quick-connect joint
liquid supply valve
of the present invention when the gravity cover is closed;
FIG. 2 is a schematic cross-sectional structural view of a right valve body of
the quick-connect
joint liquid supply valve of the present invention;
FIG. 3 is a schematic structural view of the right valve body of the quick-
connect joint liquid
supply valve of the present invention;
FIG. 4 is a schematic cross-sectional structural view of a left valve body of
the quick-connect
joint liquid supply valve of the present invention;
FIG. 5 is a schematic structural view of the left valve body of the quick-
connect joint liquid
supply valve of the present invention;
FIG. 6 is a schematic structural view of a pre-tightening rod of the quick-
connect joint liquid
supply valve of the present invention;
FIG. 7 is a schematic cross-sectional structural view of a pre-tightening
choke plug of the quick-
connect joint liquid supply valve of the present invention;
FIG. 8 is a schematic cross-sectional structural view of a pre-tightening
cylinder of the quick-
connect joint liquid supply valve of the present invention;
FIG. 9 is a schematic structural view of a pre-tightening cylinder cap of the
quick-connect joint
liquid supply valve of the present invention;
FIG. 10 is a schematic cross-sectional structural view of a ball rod head of
the quick-connect
joint liquid supply valve of the present invention;
FIG. 11 is a schematic structural view of a ball rod of the quick-connect
joint liquid supply valve
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Date Recue/Date Received 2022-05-06
of the present invention;
FIG. 12 is a schematic structural view of an eccentric cam of the quick-
connect joint liquid
supply valve of the present invention;
FIG. 13 is a schematic structural view of a gravity cover connecting rod of
the quick-connect
joint liquid supply valve of the present invention;
FIG. 14 is a schematic structural view of a mounting base of the quick-connect
joint liquid
supply valve of the present invention;
FIG. 15 is a schematic structural view of a gravity cover of the quick-connect
joint liquid supply
valve of the present invention;
FIG. 16 is a schematic structural view of a blocking piece of the quick-
connect joint liquid
supply valve of the present invention;
FIG. 17 is a schematic cross-sectional structural view of a female plug of the
quick-connect
joint liquid supply valve of the present invention;
FIG. 18 is a schematic cross-sectional structural view of a middle choke plug
of the quick-
connect joint liquid supply valve of the present invention;
FIG. 19 is a schematic cross-sectional structural view of a switch of the
quick-connect joint
liquid supply valve of the present invention;
FIG. 20 is a schematic cross-sectional structural view of the quick-connect
joint liquid supply
valve of the present invention when the gravity cover is open;
FIG. 21 is a partial schematic cross-sectional structural view showing
coupling of a quick
coupling plug of one quick-connect joint liquid supply valve to a quick
coupling plug of another
quick-connect joint liquid supply valve according to the present invention;
and
FIG. 22 is a schematic cross-sectional structural view of a ball rod sleeve of
the quick-connect
joint liquid supply valve of the present invention.
In the figures: 1 - left valve body, 2 - female plug, 3 - switch, 4 - switch
spring, 5 - plug
ball, 6 - 0-ring, 7 - blocking piece, 8 - choke plug spring, 9 - middle choke
plug, 10 - female plug
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Date Recue/Date Received 2022-05-06
connection hole, 11 - metal retaining ring, 12 - gravity cover mounting screw,
13 - gravity cover, 14
- oil inlet control hole, 15 - gravity cover connecting rod, 16 - mounting
base, 17 - eccentric cam, 18
- ball rod, 19 - pin, 20 - screw, 21 - oil inlet hole, 22 - oil inlet
communicating hole, 23 - pre-tightening
rod, 24 - pre-tightening choke plug, 25 - nut, 26 - right valve body, 27 - pre-
tightening cylinder, 28 -
pre-tightening spring, 29 - ball, 30 - ball rod head, 31 - ball rod sleeve, 32
- ball rod spring, 33 - pre-
tightening cylinder cap, 34 - rectangular connecting rod working hole, 35 -
pressure control valve
chamber, 36 - top of male plug, 37 - oil outlet hole, 38 - right oil outlet
chamber, 39 - base mounting
groove, 40 - right valve body assembly positioning hole, 41 - ball positioning
groove, 42 - ball rod
mounting hole, 43 - male plug top oil through hole, 44 - right valve body
connection through hole,
45 - right valve body positioning through hole, 46 - male plug, 47 - left
valve body assembly
positioning boss, 48 - oil inlet chamber, 49 - gravity cover mounting hole, 50
- left oil outlet
chamber, 51 - threaded through hole, 52 - pre-tightening rod through hole, 53 -
annular groove, 54 -
ball accommodating groove, 55 - ball rod head through hole, 56 - cylindrical
groove, 57 - ball rod
mounting through hole, 58 - ball rod connecting boss, 59 - eccentric cam
mounting through hole,
60 - eccentric cam synchronization connecting rod, 61 - guide slot, 62 - T-
shaped connecting rod,
63 - oil through hole, 64 - inner hole, 65 - outer hole, 66 - truncated cone-
shaped through hole,
67 - switch shoulder, 68 - vertical guide slot, 69 - mounting base boss, 70 -
gravity cover connecting
rod guide rod, 71 - gravity cover connecting hole, 72 - gravity cover
rectangular slot, 73 - left valve
body positioning through hole, 74 - pre-tightening spring mounting disc, 75 -
left valve body
connection through hole, 76 - mounting base connecting shaft
Detailed Description of the Embodiments
The embodiments of the present invention will be further described in detail
below with
reference to the accompanying drawings.
As shown in FIG. 1 and FIG. 20, a quick-connect joint liquid supply valve of
the present
invention includes a right valve body 26, a left valve body 1, a pre-
tightening mechanism, a spring
14
Date Recue/Date Received 2022-05-06
ball linkage mechanism, and a quick coupling plug. The left valve body 1 and
the right valve body
26 are combined in a left-right manner. The pre-tightening mechanism is
arranged in the right valve
body 26, two ends of the spring ball linkage mechanism are arranged in the
left valve body 1 and the
right valve body 26 respectively, and the quick coupling plug is arranged on
the left valve body 1.
The right valve body 26 and the left valve body 1 combined together are fixed
to a workbench.
As shown in FIG. 2 and FIG. 3, a lower part of the right valve body 26 is
provided with a right
oil outlet chamber 38, an upper part of the right valve body 26 is vertically
provided with a pressure
control valve chamber 35 in communication with the right oil outlet chamber
38, an oil inlet
communicating hole 22 and a rectangular connecting rod working hole 34 are
transversely provided
on a left side of the pressure control valve chamber 35, the oil inlet
communicating hole 22 is located
above the rectangular connecting rod working hole 34, the oil inlet
communicating hole 22 and the
rectangular connecting rod working hole 34 are both in communication with the
pressure control
valve chamber 35, a ball rod mounting hole 42 is provided in the rectangular
connecting rod working
hole 34, a base mounting groove 39 is provided on a left surface of the right
valve body 26, a right
valve body assembly positioning hole 40 is provided with on a left side of the
right oil outlet chamber
38 of the right valve body 26, a male plug 46 protruding rightward and having
three stepped surfaces
is provided on a right side of the right oil outlet chamber 38 of the right
valve body 26, diameters of
the three stepped surfaces of the male plug 46 having the three stepped
surfaces gradually decrease
from left to right, a middle step area of the male plug 46 is provided with a
ball positioning groove
41, and a right stepped surface area of the male plug 46 is provided with
external threads configured
for threaded connection with an external oil pipe. As shown in FIG. 21, the
male plug 46 is provided
with an oil outlet hole 37 in communication with the right oil outlet chamber
38, a male plug top 36
of the male plug 46 is provided with a male plug top oil through hole 43, four
transverse right valve
body connection through holes 44 are respectively provided at four corners of
the upper part of the
.. right valve body 26, and two right valve body positioning through holes 45
are respectively provided
at two corners of the lower part of the right valve body 26.
Date Recue/Date Received 2022-05-06
As shown in FIG. 4 and FIG. 5, an upper part of the left valve body 1 is
provided with an oil
inlet chamber 48, a lower part of the left valve body 1 is provided with a
left oil outlet chamber 50,
an oil inlet control hole 14 configured to communicate the oil inlet chamber
48 with the left oil outlet
chamber 50 is provided between the oil inlet chamber 48 and the left oil
outlet chamber 50, a top of
the left valve body 1 is provided with an oil inlet hole 21 in communication
with the oil inlet chamber
48, the oil inlet hole 21 is provided with internal threads, and the oil inlet
chamber 48 is in
communication with an external oil source through the oil inlet hole 21; a
female plug connection
hole 10 is provided on a left side of the left oil outlet chamber 50, and the
female plug connection
hole 10 is provided with internal threads; a through hole is provided on a
right side of the left oil
outlet chamber 50, a left valve body assembly positioning boss 47 is arranged
on an outer side of the
through hole, and a gravity cover mounting hole 49 is arranged in the left oil
outlet chamber 50; the
left valve body assembly positioning boss 47 is engaged with the right valve
body assembly
positioning hole 40 to axially position the left valve body 1 and the right
valve body 26. Four
transverse left valve body connection through holes 75 are respectively
provided at four corners of
the oil inlet chamber 48 in the upper part of the left valve body 1, screws 20
are respectively fastened
to nuts 25 through the left valve body connection through holes 75 and the
right valve body
connection through holes 44 to fix the left valve body 1 and the right valve
body 26 together; two
left valve body positioning through holes 73 are respectively provided at two
corners above the
female plug connection hole 10 in the lower part of the left valve body 1, for
use in combination with
the two right valve body positioning through holes 45 on the right valve body
26; the left valve body
1 and the right valve body 26 are axially positioned by engagement of the left
valve body assembly
positioning boss 47 with the right valve body assembly positioning hole 40.
As shown in FIG. 6, FIG. 7, FIG. 8, and FIG. 9, the pre-tightening mechanism
is arranged in
the pressure control valve chamber 35 from top to bottom, and includes a pre-
tightening rod 23, a
pre-tightening choke plug 24, a pre-tightening cylinder 27, and a pre-
tightening spring 28, and a pre-
tightening cylinder cap 33; the pre-tightening choke plug 24 is provided with
a threaded through hole
16
Date Recue/Date Received 2022-05-06
51, an outer side of the pre-tightening choke plug 24 is threadedly connected
to an upper part of the
pressure control valve chamber 35, an upper part of the pre-tightening rod 23
is connected to the
threaded through hole 51 of the pre-tightening choke plug 24 by external
threads, a lower part of the
pre-tightening rod 23 is provided with a pre-tightening spring mounting disc
74, the pretension rod
23 is configured to rotate and move by the external threads, the lower part of
the pre-tightening rod
23 is arranged in the pressure control valve chamber 35 by arranging the pre-
tightening choke plug
24 on the upper part of the pressure control valve chamber 35, an upper part
of the pre-tightening
cylinder 27 is provided with a pre-tightening rod through hole 52, an annular
groove 53 is provided
on an outer surface of a middle part of the pre-tightening cylinder 27, an
internal threaded section is
provided at a bottom of the pre-tightening cylinder 27, the pre-tightening
cylinder 27 is connected to
the pre-tightening spring mounting disc 74 in the lower part of the pre-
tightening rod 23 through the
pre-tightening rod through hole 52, a pre-tightening spring 28 is sleeved
between above the pre-
tightening spring mounting disc 74 and the pre-tightening cylinder 27, the
external threads of the
upper part of the pre-tightening rod 23 extend out of the pre-tightening rod
through hole 52, an inner
upper surface of the pre-tightening cylinder 27 is pressed against an upper
end of the pre-tightening
spring 28, the pre-tightening cylinder cap 33 is a cylindrical boss structure,
and a top of the pre-
tightening cylinder cap 33 is provided with a thread structure configured for
connection with internal
threads at the bottom of the pre-tightening cylinder 27;
As shown in FIG. 10 and FIG. 11, the spring ball linkage mechanism includes a
gravity cover
mounting screw 12, a gravity cover 13, a gravity cover connecting rod 15, a
mounting base 16, an
eccentric cam 17, a ball rod 18, a pin 19, a ball 29, a ball rod head 30, a
ball rod sleeve 31, and a ball
rod spring 32; the ball rod 18 includes an upper segment, a middle segment,
and a lower segment,
the upper segment of the ball rod 18 is provided with a cylindrical groove 56,
the middle segment
and the lower segment of the ball rod 18 are each of a rectangular column
structure, a ball rod
mounting through hole 57 is provided on the middle segment of the ball rod 18,
the ball rod mounting
through hole 57 is connected to the ball rod mounting hole 42 of the right
valve body 26 by the pin
17
Date Recue/Date Received 2022-05-06
19, and a ball rod connecting boss 58 is provided at an end of the lower
segment of the ball rod 18;
the upper segment and the middle segment of the ball rod 18 are axially bent
relative to the lower
segment of the ball rod 18. As shown in FIG. 22, an upper end of the ball rod
sleeve 31 is provided
with a ball rod head through hole 55, a front end of the ball rod head 30 is
provided with a ball
accommodating groove 54, the ball 29 is mounted in the ball accommodating
groove 54, and a
shoulder is arranged on each of two sides of a rear part of the ball rod head
30; an upper end of the
ball rod sleeve 31 is provided with a ball rod head through hole 55, the ball
rod head 30 extends out
of the ball rod head through hole 55 on the ball rod sleeve 31 and is in
interference fit with the upper
segment of the ball rod 18 through a lower end of the ball rod sleeve 31, the
ball rod spring 32 is
arranged between the cylindrical groove 56 and a tail of the ball rod head 30,
and upper and lower
ends of the ball rod spring 32 are respectively pressed against a lower
surface of the ball rod head 30
and the cylindrical groove 56; the eccentric cam 17 is connected to a mounting
base connecting shaft
76 through an eccentric cam mounting through hole 59 and finally mounted on
the mounting base
16. As shown in FIG. 12 and FIG. 13, the mounting base 16 is fixed in the oil
inlet chamber 48 by
engagement of a mounting base boss 69 on one side of the mounting base 16 in
the base mounting
groove 39, the eccentric cam 17 is provided with the eccentric cam mounting
through hole 59, the
eccentric cam mounting through hole 59 is connected to an eccentric cam
synchronization connecting
rod 60 through a connecting shaft, one end of the eccentric cam
synchronization connecting rod 60
is connected to the eccentric cam mounting through hole 59 of the eccentric
cam 17, the other end
of the eccentric cam synchronization connecting rod 60 is provided with a
guide slot 61 along a
center line thereof, and the guide slot 61 is fitted to the ball rod
connecting boss 58 on the ball rod
18; the gravity cover connecting rod 15 is a frame structure arranged around a
circumference of the
eccentric cam 17, a T-shaped connecting rod 62 is connected below the gravity
cover connecting rod
15 by a gravity cover connecting rod guide rod 70, and the gravity cover
connecting rod guide rod
70 is a crankshaft structure. As shown in FIG. 15, an earring protrusion is
arranged on a lower surface
of the gravity cover 13, the earring protrusion is provided with a gravity
cover connecting hole 71,
18
Date Recue/Date Received 2022-05-06
the gravity cover connecting hole 71 of the gravity cover 13 is movably
connected to the gravity
cover mounting hole 49 in the left valve body 1 by the gravity cover mounting
screw 12, gravity
cover rectangular slots 72 are arranged on an upper surface of the gravity
cover 13, and the gravity
cover rectangular slots 72 are movably connected to the T-shaped connecting
rod 62.
The quick coupling plug includes a female plug 2, a switch 3, a switch spring
4, a plug ball 5,
an 0-ring 6, a blocking piece 7, a choke plug spring 8, and a middle choke
plug 9, and a metal
retaining ring 11; and the female plug 2 is provided with an inner hole 64 and
an outer hole 65, six
truncated cone-shaped through holes 66 with a large outer-side diameter and a
smaller inner-side
diameter are provided in a circumferential array on a wall of the outer hole
65, a bottom of the
inner hole 64 is provided with internal threads for engagement with the female
plug connection hole
10, a blocking piece 7 is arranged between the female plug connection hole 10
and the inner hole 64.
As shown in FIG. 16, a plurality of oil through holes 63 are provided in a
center of the blocking piece
7, and the blocking piece 7 is fixed by threads. As shown in FIG. 19, a switch
shoulder 67 is arranged
on at a position in an axial through hole of the switch 3 close to an upper
end of the switch 3, a side
surface of the switch shoulder 67 is pressed against the plug ball 5, and the
middle choke plug 9 is
of a cone-shaped structure and is arranged between the inner hole 64 and the
outer hole 65. As shown
in FIG. 18, the choke plug spring 8 is arranged in the inner hole 64 between
the middle choke plug
9 and the blocking piece 7, a tip of the middle choke plug 9 is placed facing
toward the outer hole
65, a bottom of the middle choke plug 9 is pressed against an upper end of the
choke plug spring 8
and is in close contact with an upper surface of the inner hole 64, the
blocking piece 7 is screwed
into the inner threads on the bottom of the inner hole 64 to press against a
lower end of the choke
plug spring 8, and the 0-ring 6 is mounted in a groove in the outer hole 65.
FIG. 21 is a partial cross-
sectional structural view of a male plug coupled to a female plug. After
coupling, the 0-ring is in
close contact with the male plug to provide a sealing effect. In FIG. 21, the
black cross-section of the
0-ring is in close contact with a bevel edge of the male plug.
The specific mounting position is well presented in FIG. 17, and the mounting
situation is well
19
Date Recue/Date Received 2022-05-06
presented in FIG. 1 or FIG. 20. A plug ball 5 is configured to be fitted in
the truncated cone-shaped
through hole 66, the switch 3 is sleeved on an outer wall of the outer hole 65
and is pressed against
the plug ball 5, the metal retaining ring 11 is mounted in a groove on an
outer surface of the outer
hole 65, an upper surface of the switch shoulder 67 is pressed against the
metal retaining ring 11, the
switch spring 4 is mounted between the switch 3 and the outer wall of the
outer hole 65, and upper
and lower ends of the switch spring 4 are respectively pressed against a lower
surface of the switch
shoulder 67 and a shoulder of the female plug 2.
As shown in FIG. 14, the mounting base 16 is provided with a vertical guide
slot 68, a lower
end of the gravity cover connecting rod 15 is mounted in the vertical guide
slot 68, a right surface of
the mounting base 16 is in close contact with the left surface of the right
valve body 26, a lower right
end of the mounting base 16 is provided with a mounting base boss 69, the base
mounting groove 39
is provided on the left surface of the right valve body 26, and the mounting
base boss 69 is inserted
into the base mounting groove 39.
The inner-side diameter of the truncated cone-shaped through hole 66 on the
female plug 2 is
smaller than a diameter of the plug ball 5, and the inner-side diameter of the
truncated cone-shaped
through hole 66 on the female plug 2 is larger than half the diameter of the
plug ball 5; and the outer-
side diameter of the truncated cone-shaped through hole 66 on the female plug
2 is larger than the
diameter of the plug ball 5.
An inner diameter of the pre-tightening spring 28 is slightly larger than a
diameter of the pre-
tightening rod 23, an outer diameter of the pre-tightening spring 28 is
slightly smaller than a diameter
of the pre-tightening spring mounting disc 74, and the diameter of the pre-
tightening spring mounting
disc 74 is slightly smaller than an internal aperture of the pre-tightening
cylinder 27; a diameter of
the pre-tightening rod through hole 52 is slightly larger than the diameter of
the pre-tightening rod
23, the diameter of the pre-tightening rod through hole 52 is smaller than a
diameter of a lower step
area of the pre-tightening choke plug 24, and the diameter of the pre-
tightening rod through hole 52
is smaller than the outer diameter of the pre-tightening spring 28; a maximum
outer diameter of the
Date Recue/Date Received 2022-05-06
pre-tightening cylinder 27 is equal to a maximum diameter of the pre-
tightening cylinder cap 33, and
the maximum outer diameter of the pre-tightening cylinder 27 is equal to a
diameter of the pressure
control valve chamber 35, so as to divide the pressure control valve chamber
35 into upper and lower
areas not in communication with each other; and after the pre-tightening choke
plug 24 is mounted
in the pressure control valve chamber 35, a position of a bottom of the pre-
tightening cylinder cap
33 is lower than a lowermost position in the rectangular connecting rod
working hole 34 and a top
of the pre-tightening cylinder cap 33 is lower than a highest position of the
oil inlet communicating
hole 22 when a bottom of the pre-tightening choke plug 24 is in contact with
the pre-tightening
cylinder 27.
An upward/downward movement of the pre-tightening cylinder 27 drives the ball
rod 18 to
rotate clockwise/counterclockwise; when the ball rod 18 rotates clockwise to a
lowermost position
in the rectangular connecting rod working hole 34, the eccentric cam 17
rotates clockwise to a
maximum angle position; when the ball rod 18 rotates counterclockwise to an
uppermost position in
the rectangular connecting rod working hole 34, the eccentric cam 17 rotates
counterclockwise to the
maximum angle position; and when the eccentric cam 17 rotates to the maximum
angle position, the
gravity cover connecting rod 15 is moved upward/downward, to push the gravity
cover 13 to
open/close by rotating about the pin 19.
An aperture of the ball accommodating groove 54 is smaller than a diameter of
the ball rod 18;
a diameter of the ball rod head through hole 55 is slightly larger than a
diameter of the ball rod head
30, the diameter of the ball rod head through hole 55 is smaller than a
diameter of the shoulder of
the ball rod head 30, a sum of a length of the ball rod head 30 and a height
of the ball rod spring 32
when fully compressed is greater than a depth of the cylindrical groove 56 on
the upper segment of
the ball rod 18, the ball rod head 30 extends into the annular groove 53 on
the outer surface of the
pre-tightening cylinder 27, the ball rod spring 32 axially urges against a
bottom of the ball rod head
30, and the ball 29 in the ball accommodating groove on the front end of the
ball rod head 30 is
tangent to an inner surface of the annular groove 53 and is in close contact
with the inner surface of
21
Date Recue/Date Received 2022-05-06
the annular groove 53; an outer diameter of the ball rod spring 32 is slightly
smaller than the diameter
of the shoulder of the ball rod head 30; a diameter of the ball rod connecting
boss 58 is equal to a
width of the guide slot 61; a diameter of the gravity cover connecting rod
guide rod 70 is equal to a
width of the vertical guide slot 68; and when the ball rod head 30 is located
at an uppermost position
in the rectangular connecting rod working hole 34, the gravity cover
connecting rod 15 pulls the
gravity cover 13 so that the gravity cover 13 is in close contact with an
upper surface of the left oil
outlet chamber 50, to realize closing of the oil inlet control hole 14 at an
upper limit position.
A working method for the quick-connect joint liquid supply valve described
above is provided,
including the following steps.
Hydraulic oil enters the oil inlet chamber 48 of the left valve body 1 through
the oil inlet hole,
and enters an upper part of the oil inlet chamber 48 through the oil inlet
communicating hole 22 of
the right valve body 26. After pressure of the hydraulic oil rises to be
greater than a sum of hydraulic
oil pressure in a lower part of the oil inlet chamber 48 and a pre-tightening
force of the pre-tightening
spring 28, the pre-tightening cylinder 27 moves downward to drive the ball rod
head to move
downward, and the ball rod head drives the ball rod to rotate clockwise, to
gradually compress the
ball rod spring 32. When the ball rod rotates clockwise to a horizontal
position, the ball rod spring
32 reaches a maximum compression amount and tends to return to an original
length, the ball rod
continues to rotate clockwise, the ball rod spring 32 instantly springs back
and pushes the ball rod
head 18 to move downward along an inner surface of the annular groove 53, and
the ball rod 18
quickly rotates clockwise to a lowermost position to drive the eccentric cam
17 to rotate clockwise
and push the gravity cover connecting rod 15 to move downward, so that the
gravity cover 13 is
pushed downward and opened to realize instant communication between the oil
inlet chamber 48 and
the left oil outlet chamber 50 of the left valve body 1. When the pressure of
the hydraulic oil drops
to below the sum of the hydraulic oil pressure in the lower part of the oil
inlet chamber 48 and the
pre-tightening force of the pre-tightening spring 28, the pre-tightening
cylinder 27 moves upward to
drive the ball rod head 30 to move upward, and the ball rod head 30 drives the
ball rod 18 to rotate
22
Date Recue/Date Received 2022-05-06
counterclockwise, to gradually compress the ball rod spring 32. When the ball
rod 18 rotates
counterclockwise to a horizontal position, the ball rod spring 32 reaches a
maximum compression
amount and tends to return to an original length, the ball rod 18 continues to
rotate counterclockwise,
the ball rod spring 32 springs back and pushes the ball rod head 30 to move
upward along the inner
surface of the annular groove 53, and the ball rod 18 quickly rotates
counterclockwise to an
uppermost position to drive the eccentric cam 17 to rotate counterclockwise
and push the gravity
cover connecting rod 15 to move upward, so that the gravity cover 13 is pulled
upward and closed
to instantly cut off the communication between the oil inlet chamber 48 and
the left oil outlet chamber
50 of the left valve body 1.
A quick coupling method for the quick-connect joint liquid supply valve
described above is
provided, including the following steps.
The switch 3 of the female plug 2 of a first quick-connect joint liquid supply
valve is turned
rightward to cause the plug ball 5 to exit outward, the male plug 46 of a
second quick-connect joint
liquid supply valve is inserted into the outer hole of the female plug 2 of
the first quick-connect joint
liquid supply valve, and as the male plug 46 continues to be pushed toward
inside of the female plug
2, the plug ball 5 is engaged into the ball positioning groove 41 on the male
plug 46. At the same
time, the top of the male plug 46 pushes the middle choke plug 9 inside the
female plug 2 to leave
the upper surface of the inner hole of the female plug 2, so that flow
channels in the male plug 46
and the female plug 2 become in communication with each other, thus completing
coupling of the
two quick-connect joint liquid supply valves. At this moment, the switch 3 is
released, the switch
spring 4 springs back to cause the switch 3 to return to the initial position,
and the switch shoulder
67 is pressed against the plug ball 5, so that the plug ball 5 cannot
automatically exit from the ball
positioning groove 41, thus completing coupling and fixing of the two quick-
connect joint liquid
supply valves. After the coupling is completed, the switch of the female plug
2 of the first quick-
connect joint liquid supply valve is turned rightward to cause the switch
shoulder 67 to leave the
plug ball 5, the plug ball 5 exits from the ball positioning groove 41, the
compressed choke plug
23
Date Recue/Date Received 2022-05-06
spring 8 pushes the middle choke plug 9 to approach the upper surface of the
inner hole of the female
plug 2, and the middle choke plug 9 is pressed against the top of the male
plug 46 to push the male
plug 46 to exit from the outer hole of the female plug 2, to complete
separation of the two quick-
connect joint liquid supply valves.
24
Date Recue/Date Received 2022-05-06
