Note: Descriptions are shown in the official language in which they were submitted.
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UNIVERSAL QUICK CONNECTOR
TECHNICAL FIELD
100011 This disclosure generally relates to the technical field
of quick connectors
for pipeline connection, and more particularly, to a universal quick
connector.
BACKGROUND
[0002] A quick connector is a connector for quickly connecting
pipelines, which
is internally provided with a plurality of steel balls and may be fixedly
engaged with an
external plug core. The quick connector guarantees the airtightness of the
pipeline
connection while achieving a quick connection. There are various quick
connectors sold
on the market, such as a pneumatic quick connector disclosed in Chinese patent
201521018068.9, an easy-to-assemble quick connector disclosed in Chinese
patent
201521014821.7, and a quick connector disclosed in Chinese patent
201521014896.5.
[0003] Presently, conventional quick connectors are normally
designed to match
a type of plug. However, various sizes of pipelines result in various models
and sizes
of plugs. Taking American standard plugs as examples, in the prior art, there
are five
types of American standard plugs sold on the market, which respectively are:
no. 3 plug-
-industrial (Milton) plug, no. 5 plug--automotive type plug, no. 6 plug--ARO
type plug,
no.17 plug--Lincoln design plug and no.19 plug--high flow plug. The aforesaid
five
plugs have different sizes. During pipeline connection, when the quick
connectors on
different pipelines do not match the plugs, to complete the connection
operation, the
quick connectors and/or the plugs need to be replaced. As a result, the
complicated
operation brings great inconvenience to operators.
SUMMARY
100041 The purpose of the present disclosure is to provide a
universal quick
connector, which has a simple structure, may be quickly connected with various
plugs
and achieves high flexibility and installation efficiency.
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[0005] To achieve the above purpose, the present disclosure adopts the
following
technical solution: a universal quick connector comprising a bolt body, a
connector hub,
a hub outer sleeve and a connector valve core, wherein the rear end of the
connector
hub is in threaded connection with the front end of the bolt body, a plurality
of ball
grooves are uniformly distributed in the sidewall of the front end of the
connector hub
along the circumferential direction, and steel balls are arranged in the ball
grooves,
wherein the hub outer sleeve is movably sleeved outside the connector hub, and
the
inner wall of the front end of the hub outer sleeve abuts against the steel
balls, wherein
an outer sleeve spring is abutted between the hub outer sleeve and the bolt
body, and
the connector valve core is configured to be a hollow structure with an open
front end
and a closed rear end, wherein the connector valve core is movably arranged in
the
connector hub, and the inner wall of the bolt body is provided with a guiding
sleeve in
sealing fit with the connector valve core, wherein a valve core outer spring
is abutted
between the front end of the connector valve core and the guiding sleeve, and
the
sidewall of the rear end of the connector valve core is provided with an
exhaust port,
wherein the inner wall of the front end of the connector valve core is
sequentially
provided with a first annular groove and a second annular groove from front to
back,
wherein a first sealing ring is embedded in the first annular groove, a second
sealing
ring is embedded in the second annular groove, and the inner diameter of the
first
sealing ring is larger than the inner diameter of the second sealing ring,
wherein the
front end of the first annular groove is provided with a first annular step
surface, and
the rear end of the first annular groove is provided with a second annular
step surface,
wherein the rear end of the first annular step surface extends to the sidewall
of the first
annular groove, and the front end of the second annular step surface extends
to the
sidewall of the first annular groove, wherein the diameter of the first
annular step
surface is greater than the diameter of the second annular step surface, and
an annular
step is formed at the rear end of the second annular step surface.
[0006] In another aspect of the present disclosure, the interior of the
rear end of
the connector valve core is provided with a valve core inner spring.
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[0007] In another aspect of the present disclosure, the guiding sleeve
is axially
abutted between the bolt body and the connector hub.
[0008] In another aspect of the present disclosure, the inner wall of
the front end
of the guiding sleeve is embedded with a guiding sleeve sealing ring, which is
in sealing
fit with the outer wall of the connector valve core.
[0009] In another aspect of the present disclosure, a valve core sealing
ring in
sealing fit with the inner wall of the guiding sleeve is embedded in the outer
wall of the
rear end of the connector valve core.
[0010] In another aspect of the present disclosure, a bolt sealing ring
is arranged
between the guiding sleeve and the bolt body.
[0011] In another aspect of the present disclosure, the front end of the
connector
valve core is provided with an annular extension portion which abuts against
the steel
balls, and the inner diameter of the annular extension portion is greater than
or equal to
the diameter of the first annular step surface.
[0012] In another aspect of the present disclosure, the inner wall of
the front end
of the hub outer sleeve is sequentially provided with an outer sleeve
cylindrical surface
section and an outer sleeve conical surface section, which are matched with
the steel
balls from front to back. The rear end of the outer sleeve cylindrical surface
section is
connected to the front end of the outer sleeve conical surface section.
[0013] In another aspect of the present disclosure, the outer wall of
the front end
of the connector hub is provided with a stopping portion in stopping fit with
the hub
outer sleeve.
[0014] In another aspect of the present disclosure, the front end of the
first sealing
ring is axially provided with an annular extension part, and the annular
extension part
is sleeved inside the first annular step surface. The outer diameter of the
annular
extension part matches the diameter of the first annular step surface, and the
inner
diameter of the annular extension part is equal to the inner diameter of the
first sealing
ring.
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=
[0015] Compared with the prior art, the present disclosure has the
following
advantages: the connector valve core of the universal quick connector of the
present
disclosure has an improved structure. More specifically, the first sealing
ring and the
second sealing ring are respectively embedded in the connector valve core, and
the first
annular step surface and the second annular step surface with different
diameters are
arranged in the connector valve core. In this way, when in use, the quick
connector may
be quickly connected with different plugs in an insertion mode such that an
ideal sealing
effect is realized. The present disclosure has a simple structure, may be
flexibly used
and achieves high installation efficiency.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a conceptual diagram illustrating an overall
assembly
structure of embodiment 1 of the present disclosure.
[0017] Figure 2 is a conceptual diagram illustrating an overall
assembly
structure of embodiment 2 of the present disclosure.
[0018] Figure 3 is a conceptual diagram illustrating a structure of
no.3
American standard plug.
[0019] Figure 4 is a conceptual diagram illustrating a structure of
no.5
American standard plug.
[0020] Figure 5 is a conceptual diagram illustrating a structure of
no.6
American standard plug.
[0021] Figure 6 is a conceptual diagram illustrating a structure of
no.17
American standard plug.
[0022] Figure 7 is a conceptual diagram illustrating a structure of
no.19
American standard plug.
[0023] In Figures 1-7: 1-Bolt Body, 11-Bolt Sealing Ring, 2-Connector
Hub,
21-Ball Grooves, 22-Stopping Portion, 3-Hub Outer Sleeve, 31-Ourter Sleeve
Cylindrical Surface Section, 32-Outer Sleeve Conical Surface Section, 4-
Connector
Valve Core, 41-Annular Extension Portion, 42-Exhaust Port, 43-First Annular
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Groove, 431-First Sealing Ring, 4311-Annular Extension Part, 44- Second
Annular
Groove, 441- Second Sealing Ring, 45-First Annular Step Surface, 46-Second
Annular Step Surface, 47-Annular Step, 48-Valve Core Sealing Ring, 5-Steel
Balls, 6-
Outer Sleeve Spring, 7-Guiding Sleeve, 71-Guiding Sleeve Sealing Ring, 8-Valve
Core Outer Spring, 9-Valve Core Inner Spring, 101-Columnar Insertion Section,
102-
Flat Ring, 103-Clamping Groove.
DETAILED DESCRIPTION
[0024] Figures and detailed embodiments are combined hereinafter to
further
elaborate the technical solution of the present disclosure.
[0025] Embodiment 1
[0026] As shown in Figure 1, the universal quick connector of the
present
disclosure comprises a bolt body 1, a connector hub 2, a hub outer sleeve 3
and a
connector valve core 4. The rear end of the connector hub 2 is in threaded
connection
with the front end of the bolt body 1, a plurality of ball grooves 21 are
uniformly
distributed in the sidewall of the front end of the connector hub 2 along the
circumferential direction, and steel balls 5 are arranged in the ball grooves
21. The hub
outer sleeve 3 is movably sleeved outside the connector hub 2, and the outer
wall of the
front end of the connector hub 2 is provided with a stopping portion 22 in
stopping fit
with the hub outer sleeve 3. The inner wall of the front end of the hub outer
sleeve 3
abuts against the steel balls 5. More specifically, the inner wall of the
front end of the
hub outer sleeve 3 is sequentially provided with an outer sleeve cylindrical
surface
section 31 and an outer sleeve conical surface section 32, which are matched
with the
steel balls 5 from front to back. The rear end of the outer sleeve cylindrical
surface
section 31 is connected to the front end of the outer sleeve conical surface
section 32,
and the front end of the connector valve core 4 is provided with an annular
extension
portion 41, which abuts against the steel balls 5. An outer sleeve spring 6 is
abutted
between the hub outer sleeve 3 and the bolt body 1, and the connector valve
core 4 is
configured to be a hollow structure with an open front end and a closed rear
end. The
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connector valve core 4 is movably arranged in the connector hub 2, and the
inner wall
of the bolt body 1 is provided with a guiding sleeve 7 in sealing fit with the
connector
valve core 4. A valve core outer spring 8 is abutted between the front end of
the
connector valve core 4 and the guiding sleeve 7, and the sidewall of the rear
end of the
connector valve core 4 is provided with an exhaust port 42.
[0027] The aforesaid is the main structure of the universal quick
connector of the
present disclosure. As the operating principle of the present disclosure is
the same as
that of conventional quick connectors, it is briefly described herein. For
details, the
quick connector disclosed in Chinese patent 201521014896.5 may be referred.
[0028] As an improvement of the present disclosure, the inner wall of
the front
end of the connector valve core 4 is sequentially provided with a first
annular groove
43 and a second annular groove 44 from front to back. A first sealing ring 431
is
embedded in a first annular groove 43, a second sealing ring 441 is embedded
in the
second annular groove 44, and the inner diameter of the first sealing ring 431
is larger
than the inner diameter of the second sealing ring 441. The front end of the
first annular
groove 43 is provided with a first annular step surface 45, and the rear end
of the first
annular groove 43 is provided with a second annular step surface 46. The rear
end of
the first annular step surface 45 extends to the sidewall of the first annular
groove 43,
and the front end of the second annular step surface 46 extends to the
sidewall of the
first annular groove 43. The diameter of the first annular step surface 45 is
greater than
the diameter of the second annular step surface 46, and an annular step 47 is
formed at
the rear end of the second annular step surface 46. In this embodiment, to
achieve a
quick connection with the plug, the inner diameter of the annular extension
portion 41
is greater than or equal to the diameter of the first annular step surface 45.
[0029] The connector valve core 4 of the universal quick connector of
the present
disclosure has an improved structure. More specifically, the first sealing
ring 431 and
the second sealing ring 441 are respectively embedded in the connector valve
core 4,
and the first annular step surface 45 and the second annular step surface 46
with
different diameters are arranged in the connector valve core 4. In this way,
when in use,
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the quick connector may be quickly connected with different plugs in an
insertion mode
such that an ideal sealing effect is realized. The present disclosure has a
simple structure,
may be flexibly used and achieves high installation efficiency.
[0030] To allow those skilled in the art to understand the structural
features and
effects of the present disclosure, five types of American standard plugs are
taken as
examples to further describe the present disclosure.
[0031] Figures 3-7 show the structures of the five types of American
standard
plugs (namely, no.3 plug, no.5 plug, no.6 plug, no.17 plug and no.19 plug). As
shown
in Figures 3-7, the main structures of the five types of plugs are basically
the same,
wherein an insertion end of each plug is provided with a columnar insertion
section 101
and a clamping groove 103, and a flat ring 102 is formed between the columnar
insertion section 101 and the clamping groove 103. What makes the aforesaid
plugs
different is that the dimensions of the insertion ends are different. More
specifically, the
axial length of the columnar insertion section 101 and the diameter of the
flat ring 102
are different. For instance, the outer diameter of the columnar insertion
section 101 of
no.3, no.6 and no.19 plugs are relatively large. The outer diameter of the
columnar
insertion section 101 of no.17 plug is relatively small but the axial length
of the
columnar insertion section 101 of no.17 plug is relatively long. When
connecting no.3
or no.6 plug with the quick connector, the columnar insertion section 101 of
the plug is
inserted into the connector valve core 4, and the end portion of the columnar
insertion
section 101 abuts against the annular step 47, thereby pushing the connector
valve core
4 to move backwards relative to the connector hub 2. Thus, the steel balls 5
are clamped
into the clamping groove 103 of the plug. In the aforesaid two assembled
states, the
connector valve core 4 is in sealing contact with the outer wall of the
columnar insertion
section 101 of no. 3 or no.6 plug through the inner wall of the first sealing
ring 431. In
this way, an ideal sealing connection effect is achieved.
[0032] When connecting no.5 or no.19 plug with the quick connector of
the
present disclosure, the end portion of the columnar insertion section 101
abuts against
the front-end surface of the first sealing ring 431, thereby pushing the
connector valve
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core 4 to move backwards relative to the connector hub 2. Thus, the steel
balls 5 are
clamped into the clamping groove 103 of the plug. In the aforesaid two
assembled states,
the connector valve core 4 is in sealing contact with end surface of no.5 or
no.19 plug
through the front-end surface of the first sealing ring 431. In this way, an
ideal sealing
connection effect is achieved.
[0033] When connecting no.17 plug with the quick connector of the
present
disclosure, the end portion of the columnar insertion section 101 of the plug
penetrates
through the second sealing ring 441 and extends into the rear end of the
connector valve
core 4, thereby pushing the connector valve core 4 to move backwards relative
to the
connector hub 2. Thus, the steel balls 5 are clamped into the clamping groove
103 of
the plug, and the connector valve core 4 is in sealing contact with the outer
wall of the
columnar insertion section 101 of no.17 plug through the inner wall of the
second
sealing ring 441. In this way, an ideal sealing connection effect is achieved.
[0034] It should be noted that, in this embodiment, the five types of
American
standard plugs are taken as examples to describe the present disclosure, and
thus the
specific sizes of the first sealing ring 431, the second sealing ring 441, the
first annular
step surface 45, the second annular step surface 46 and the annular step 47
are matched
with the corresponding sizes of the aforesaid five types of American standard
plugs.
[0035] Preferably, the interior of the rear end of the connector valve
core 4 is
provided with a valve core inner spring 9. For plugs with a comparatively thin-
long
columnar insertion section 101 (e.g., no.17 American standard plug), when the
plug and
the connector valve core 4 are connected in an insertion mode, the elastic
effect of the
valve core inner spring 9 is utilized to ensure that the plug does not loosen.
To prevent
the valve core inner spring 9 from shaking in the connector valve core 4,
during
assembly, the valve core inner spring 9 may be installed into the connector
valve core
4 in an appropriate interference manner. Thus, when the valve core inner
spring 9 is not
compressed by the plug, by means of the interference acting force of the inner
wall of
the connector valve core 4, the spring may be prevented from shaking, and when
the
plug abuts against the valve core inner spring 9, the valve core inner spring
9 may play
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,
a role in preventing the plug from loosening.
[0036] Preferably, the guiding sleeve 7 is axially abutted
between the bolt body
1 and the connector hub 2. In other words, the guiding sleeve 7 of the present
disclosure
is detachable relative to the bolt body 1 and the connector valve core 4.
Through
adopting the aforesaid design, the installation is convenient, the processing
is simple
and the concentricity of the product is ensured.
[0037] Further, to improve the internal sealing performance of
the present
disclosure, the inner wall of the front end of the guiding sleeve 7 is
embedded with a
guiding sleeve sealing ring 71, which is in sealing fit with the outer wall of
the
connector valve core 4. A valve core sealing ring 48 in sealing fit with the
inner wall of
the guiding sleeve 7 is embedded in the outer wall of the rear end of the
connector valve
core 4, and a bolt sealing ring 11 is arranged between the guiding sleeve 7
and the bolt
body 1.
[0038] Embodiment 2
[0039] The basic structure and operating principle of embodiment
2 is the same
as that of embodiment 1. The difference between them is: as shown in Figure 2,
the
front end of the first sealing ring 431 is axially provided with an annular
extension part
4311, and the annular extension part 4311 is sleeved inside the first annular
step surface
45. The outer diameter of the annular extension part 4311 matches the diameter
of the
first annular step surface 45, and the inner diameter of the annular extension
part 4311
is equal to the inner diameter of the first sealing ring 431.
[0040] When connecting no.3 or no.6 plug with the quick
connector, the
columnar insertion section 101 of the plug is inserted into the connector
valve core 4,
and the end portion of the columnar insertion section 101 abuts against the
annular step
47, thereby pushing the connector valve core 4 to move backwards relative to
the
connector hub 2. Thus, the steel balls 5 are clamped into the clamping groove
103 of
the plug. In the aforesaid two assembled states, the connector valve core 4 is
in sealing
contact with the outer wall of the columnar insertion section 101 of no. 3 or
no.6 plug
through the inner wall of the first sealing ring 431 and the inner wall of the
annular
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extension part 4311. In this way, an ideal sealing connection effect is
achieved.
[0041] When connecting no.5 or no.19 plug with the quick connector of
the
present disclosure, the end portion of the columnar insertion section 101
abuts against
the front-end surface of annular extension part 4311 of the first sealing ring
431, thereby
pushing the connector valve core 4 to move backwards relative to the connector
hub 2.
Thus, the steel balls 5 are clamped into the clamping groove 103 of the plug.
In the
aforesaid two assembled states, the connector valve core 4 is in sealing
contact with
end surface of no.5 or no.19 plug through the front-end surface of the annular
extension
part 4311. In this way, an ideal sealing connection effect is achieved.
[0042] When connecting no.17 plug with the quick connector of the
present
disclosure, the connection and sealing methods are the same as that of
embodiment 1,
which are briefly described herein.
[0043] In this embodiment, by means of the annular extension part 4311
arranged
at the front end of the first sealing ring 431, when the quick connector is
connected with
different plugs, the sealing performance may be significantly enhanced.
Meanwhile,
when no.3 and no.6 plugs are used in a high-pressure fluid environment
(typically
300PSI), through the arrangement of the annular extension part 4311, the first
sealing
ring 431 may be prevented from falling off when the plug is pulled out from
the quick
connector of the present disclosure. Thus, the reliable use of the quick
connector is
ensured.
[0044] The above are merely preferred embodiments of the present
disclosure,
and thus any equivalent alterations or modifications made according to the
structure,
features and principles described in the scope of the present disclosure are
included in
the scope of the present disclosure.
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