Fluid handling – With repair – tapping – assembly – or disassembly means – Assembling – disassembling – or removing cartridge type valve
Patent
1990-02-09
1990-09-04
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Assembling, disassembling, or removing cartridge type valve
1374546, 251174, 251315, 251316, 251317, F16K 4300, F16K 506, F16K 2500
Patent
active
049535870
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a ball valve or pipelines.
A ball valve has been disclosed in U.S. Pat. No. US-A-4580762 comprising an outer housing in the form of a substantially cylindrical pot open at one axial end and closed at the opposite axial end and having two diametrically opposing openings in a wall of the housing, the outer sides of the openings being adapted for connecting the housing into a pipeline and flat annular seat faces being formed around the openings at the inner sides thereof, an annular wedge-shaped ring located against each one of said seat faces with the shallowest dimension of the ring nearest the open end of the outer housing, an inner housing having two opposing openings in a wall of the inner housing, flat annular seats being formed around the openings at the outer sides thereof, two annular wedge-shaped adaptors each having an annular shoulder located against the respective seats on the inner housing, an inclined annular surface on the outer side of each adaptor with the deepest dimension of each adaptor nearest the open end of the outer housing, a ball member mounted for rotation within the inner housing, the ball member having a diametrical through passage and a rotatable operating stem journalled in a removable closure bonnet, the inner housing, the adaptors, the ball member and operating stem being insertable into and withdrawable as a subassembly from the outer housing through its open end, the subassembly being insertable into the outer housing to a fully assembled condition therewith where the inclined annular surface of each adaptor is wedgingly engaged with one of said annular wedge-shaped rings and the ball member being rotatable between an open position where its through passage is aligned with the adaptors and a closed position where the openings are blocked by the ball member.
The ball valve of the present invention is characterised in that the inner housing is also in the form of a substantially cylindrical pot open at one axial end and closed at the opposite axial end, the two opposing openings in the wall of the inner housing also diametrically opposing each other, the ball member being rotatable about the axis of the inner housing and being installable into the inner housing through the open end thereof, and the removable bonnet closing the inner housing which in turn closes and is rigidly secured within and to the outer housing, and in that each adaptor also has a cylindrical neck projecting through the associated opening in the inner housing, the neck housing annular seal means resiliently engaging the ball member.
In the earlier disclosed ball valve the inner housing is spring-urged within the outer housing so that the wedging engagement between the adaptors and the annular wedge-shaped rings produces a very tight engagement between the adaptors and the ball member to such an extent that it is necessary to release the wedging engagement against the spring-urging before the ball member can be rotated. In the present invention the resilient engagement of the annular seal means with the ball member provides ample sealing while permitting rotation of the ball member. Furthermore, in the earlier disclosed ball valve the inner housing is assembled and dismantled with the ball member housed therein. In the present invention the ball member can be removed from installed in the inner housing through the open end thereof. The valve of the invention also complies with BSI and API requirements. In firesafe applications the invention may embody the sealing arrangements disclosed in European (U.K.) Patent Specification No. 0027048 and complies with BS No. 5146 firesafe requirements and equivalent API firesafe requirements
An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawing, in which:
FIG. 1 is an axial sectional view of a fully assembled valve embodying the invention;
FIG. 2 shows a detail of FIG. 1 to an enlarged scale; and FIG. 3a and 3b are respectively a sectional side view and an end view of an annular wedg
REFERENCES:
patent: 3150681 (1964-09-01), Hansen et al.
patent: 3179121 (1965-04-01), Bredtschneider
patent: 3211421 (1965-10-01), Johnson, Jr. et al.
patent: 3576309 (1971-04-01), Zawacki et al.
patent: 3838844 (1974-10-01), Arn
patent: 3920036 (1975-11-01), Westenrieder
patent: 4460012 (1984-07-01), Koumi et al.
patent: 4562860 (1986-01-01), Walter et al.
patent: 4580762 (1986-04-01), Hirtz et al.
patent: 4606368 (1986-08-01), McCafferty
T K Valve Limited
Walton George L.
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