Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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The invention relates to a spherical cock with a
ball-shaped metallic or ceramic stopcock. -~
It is known to construct a spherical cock arrayed
in a casing with loose or fixed axle-end pivots or
floatingly arrayed therein in such a way that the stopcock
centers itself in the longitudinal and vertical axis between
seat frames.
The present invention provides spherical cocks
having ball-shaped stopcocks for pi.ping which is subjected
to high pressures and whose seat frames bear directly on ;~
corresponding opposing surfaces of the stopcock. No
additional plastic soft packing both at low and high
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pressures as well as at negative pressure (vacuum) is ;
provided. A sealing effect is essentially assured by the ;
surface quality of the mating cock surfaces which are
pressed against one another by means of spring tensioning in
order to effect closed linkage. ~ ;
According to one aspect of the invention, a ~
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spherical cock comprises a valve casing with a fluid
passageway formed therein, a spherical metallic or ceramic
stopcock pivotably mounted in said casing and adapted to
close or open said passageway, means for pivoting said
stopcock in order to operate same, seating frames with
metallic or ceramic surfaces for engaging said stopcock,
said frames being mounted in said casing, wherein the -~
spherical surface of said stopcock bears directly on said
metallic or ceramic surfaces of said seating frames without
the use of soft packing.
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According to another aspect of the invention, a
spherical cock comprises a one-part valve casing with a
fluid passageway formed therein; a top cover to close off
said casing; a spherical metallic or ceramic stopcock
pivotably mounted in said casing and adapted to close or
open said passageway; means for pivoting said stopcock in ~ .
order to operate same; seating frames for engaging said :
stopcock, each frame comprising two large rings -~
interconnected by a corrugated tubing spring, said frames
being mounted in said one-part casing in such manner that
said stopcock and rings can be replaced without removing the
cock from the conduit, wherein the spherical surface of said
stopcock bears directly on contacting surfaces of said
seating frames without the use of soft packing.
According to a further aspect of the invention, a
spherical cock comprises a one-part valve casing with a ..
fluid passageway formed therein; a top cover to close off .
and seal said casing; a spherical metallic or ceramic ~.
stopcock pivotably mounted in said casing and adapted to ~ :
close or open said passageway; means for pivoting said
stopcock in order to operate same; seating frames for ~:
engaging said stopcock, said frames being mounted in said
one-part casing and laterally displaceable in a cavity ' ~;
formed in said casing, said lateral displacement enabling
installation and removal of said stopcock; coil springs
pressing said seating frames against said stopcock, and ;
sealing rings for sealing the joint between the seating .~
frames and said casing. - :.
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The stopcock arrayed in a casing with loose or
fixed axle-end pivots or floatingly arrayed therein is
arranged in such a way that it centers itself in the
longitudinal and vertical axis between metallic seat frames.
Thus the seat frames, which are made of metallic or ceramic ~ ,:
materials, bear directly on corresponding metallic or ;:
ceramic opposing surfaces of the stopcock.
Further features and advantages will be apparent
from the following detailed description of preferred ~:
embodiments taken in conjunction with the accompanying
drawings.
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In the drawings, :~
Figure 1 is a longitudinal cross-section of a
spherical cock employing two casing parts and an indexing ~;
bolt;
Figure 2 is a longitudinal cross-section of
another embodiment employing two casing parts and an
indexing bolt;
Figure 3 is another view, partly in cross-section,
of the central portion of the cock of Figure 2;
Figure 4 is a longitudinal cross-section of a
further embodiment of a spherical cock with two casing parts ~ ;
and,a stopcock supported by two pivot pins;
Figure 5 is another longitudinal view, partly in
cross-section, of a spherical cock employing two casing .:~
parts and fixed pivot pins; ..
Figure 6 is another view, partly in cross-section,
of the central part of the cock of Figure 5;
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Figure 7 is another view, partly in cross-section
of the cock of Figure 5;
Figure 8 is a horizontal cross-section of the
stopcock and seating frames of Figure 5;
Figure 9 is a cross-sectional detail view of the
stopcock of Figure 5 showing sealing rings arrayed on fixed
pins of the stopcock;
Figure 10 is a longitudinal view, partly in cross-
section, of another embodiment having a one-part casing
closed off by a top member; and
Figure 11 is a longitudinal view, partly in cross-
section, of a further embodiment having a one-part valve
casing closed off by a top cover, said view also detailing ~ :
certain sealing rings.
Figure 1 shows a section through the longitudinal
axis of a spherical cock constructed in accordance with the ~ ~
invention in which b~th casing parts 1, 2 are interconnected ; ;
by a central thread arrayed in direction of flow while the `
stopcock 10 is mounted in floating position therein. Seat
frames 30 are tightly compressed in the casing parts 1, 2.
An indexing bolt 3 is supported in the casing part 1 by
means of a conical shoulder and is pressed against by a coil
sprlng 8 housed along the longitudinal axis of the bolt.
This spring, with its other end, bears upon the stopcock 10.
Figure 2 shows a cock according to the invention
in a section through the longitudinal axis. The casing 1, 2
consists of two parts which are interconnected by means of
screws eccentrically arrayed but not shown in this figure.
Cup spring shaped seating frames 30 are maintained in
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position in their respective casing parts by tightly
compressed clamping rings 31. The indexing bolt 3 (for
example according to Figure 1) is pressed by a spring 8 via
a conical shoulder in the casing part 1 and the spring bears
upon the stopcock 10. The seating frames, on their side
which is turned away from the sphere, have, as for example
in Figure 1, a clearance angle which allows them an elastic
transverse movement but which, at the same time, restricts ~-
the clearance angle. In this way each seat frame can
support itself on the adjacent side of the casing.
Figure 3 depicts another cross-section of the cock
according to Figure 2.
Flgure 4 shows, in a longitudinal section, a
spherical cock with an asymmetrically divided cock casing ;
1, 2, whose stopcock 10 is guided by two separate pivot plns
4. The seating Erames 30 are slmilarly configured as in
Figures 2 and 3. They are tlghtly compressed in both ~
caslng parts 1, 2 and, owing to their shape are able to - ~ :
execute in the longitudinal axls of the casing an elastic :; ~
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transverse motion, slight but essential to the sealing
action. In this example, the upper pivot pin 4 is at the ;;
same time the indexing bolt which bears axially on a conical ;
shoulder in casing part 1, while the conical stopcock 10
itself remains free of axial pressure. In order to activate
the stopcock 10 when the upper pin 4 is actuated, provision ~;
is made for a cylindrical wedge sustained by a pin. -
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Figures 5, 6 and 7 show a vertically, ~` ;
symmetrically divided spherical cock casing 1, within whose `
halves tightly compressed elastic seating frames 30 form the
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seal between the casing and the stopcock 10. Thus the
seating frames 30, by virtue of their configuration, are
afforded in much the same way as in the embodiments
according to Figures 1 to 4, the requlsite slight spring
deflection. Additionally, in this cock configuration,
elastic sealing rings 19 which are ground on their counter-
opposed surfaces and which abutt the plane surfaces 17 on
the fixed pins of the stopcock 10 and are tightly connected
by compression to the stopcock pins, work to produce the
sealing effect between both stopcock pins and the bushings
16 built into the casing part 1 and serving as bearings.
These bushings, in turn, are sealed vis-a-vis the casing
half 1, by a three-dimensional circular cord packing 7 in a
manner known in the art.
Figure 8 shows the stopcock 10 according to Figure ~ ;
5 and the seatin~ frames 30 in a horizontal cross-section
through these co~ponents.
Figure 9 shows the mode of operation of the
sealing rings 19 arrayed on the pins of the stopcock 10. ;
The sealing rings have been compressed on the fixed pins of
the stopcock 10 in such a way that they remain tight inside
the bearing bushings 16 packed in the casing parts when
there is a pivoting movement of the stopcock. To this end
installation of the sealing rings 19 must be performed under
conditions necessitating a pretensioning oE the plane
surfaces 17. The bearing bushings 16 have been safeguarded
against dirt penetration by soft packing 18.
Figure 10 shows a spherical cock with one-part
casing 9 closed off by a top 49 (top entry). The sealing
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elements in this case are multi-part and consist of large or
massive rings 5, 6 and a corrugated tubular element 32
which, by compressing or welding, are formed, respectively, -~
into one unit whereby the corrugated tubing 32 is designed
to enable an axial displacement of the seating frame unit in
the valve casing during installation and removal. This -
displacement is required for mounting of the spherical ~-
stopcock 10 from the top. The corrugated tubing 32 is also
intended to function additionally as a spring element for
the contact between the seating frame unit 30, 31, 32 and
the spherical stopcoc~ 10. The ring packings 13, 14
provided on the top 49 can, where necessary, consist of non-
flammable material or C-shaped metal rings. -
Figure 11 shows a spherical cock also with a one-
part casing 9 closed off by a top cover 49 (top-entry). The
seating frames in this embodiment are metallic, sealing ~ ;`
rings or main rings 30. In this configuration, the main :
rings 30 are pressed by coil springs 33 against the ;`
spherical stopcock 10 fixed in the casing 9 and top 49. The ` ~ ~
seating frames 30 are sealed off vis-a-vis the cock casing 1 , ~ `
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by sealing rings in the form of C-shaped, elastic metal
rings 11 which are maintained in position on the seating ';~
frames 30 by compressed support rings 12. In like manner, a ;
sealing ring 7 on the casing cover 49 and a sealing ring 13 ; ;
which seals off the indexing bolt 3 against the top cover 49
can consist of C-shaped, elastic metal rings in order to -~
assure incombustibility.
