IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0441096
(1982-11-12)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Marbor Engineering Associates
|
인용정보 |
피인용 횟수 :
17 인용 특허 :
0 |
초록
▼
A valve ring arrangement is disclosed in which the corrosion sensitive parts of shut-off valves, control valves and condensate-removal devices are kept out of contact with condensate accumulations. Also disclosed are float and bucket-type condensate-removal devices which are protected against shutdo
A valve ring arrangement is disclosed in which the corrosion sensitive parts of shut-off valves, control valves and condensate-removal devices are kept out of contact with condensate accumulations. Also disclosed are float and bucket-type condensate-removal devices which are protected against shutdown corrosion by means of automatically draining them during shutdowns.
대표청구항
▼
1. A shutoff valve for a steam distribution system wherein condensate accumulates as the system is shut down, said valve comprising a valve body with a valve ring boss, a valve ring having a valve ring collar inserted into the valve ring boss, the valve ring and the valve ring boss having interfacin
1. A shutoff valve for a steam distribution system wherein condensate accumulates as the system is shut down, said valve comprising a valve body with a valve ring boss, a valve ring having a valve ring collar inserted into the valve ring boss, the valve ring and the valve ring boss having interfacing sealing surfaces therebetween which are located above the level of any possible condensate accumulation inside the valve body, the valve ring and the valve ring boss having sloping surfaces all around the interfacing sealing surfaces which together form a monotonically declining continuous mantle, said mantle declining away from the interfacing sealing surfaces to thereby ensure complete drainage of condensate from the sealing surfaces and the mantle. 2. A shut-off valve according to claim 1, wherein the interfacing sealing surfaces between the valve ring and the valve ring boss are perpendicular to the valve ring axis, and the valve ring collar and the valve ring boss are machined after assembly to produce a single continuous cylindrical or conical facet straddling the sealing surface thereby ensuring that surface discontinuities, which might retain condensate in contact with a machined surface, are eliminated. 3. A shut-off valve according to claim 1, wherein the interfacing sealing surfaces between the valve ring and the valve ring boss are upright conical and the interfacing sealing surface of the valve ring boss extends to or beyond the sealing surface of the valve ring to form a part of monotonically declining continuous mantle. 4. A shut-off valve according to claim 3, wherein the cone angle of the interfacing sealing surface of the valve ring is smaller than the cone angle of the valve ring boss, providing a single line sealing contact along the perimeter of the interfacing surface of the valve ring. 5. A shut-off valve according to any of claims 1 through 4, wherein the valve ring is fastened into the valve ring boss by means of a threaded connection sealed by means of an elastic ring. 6. A shut-off valve according to claim 1, wherein a valve ring is fastened into the valve ring boss and sealed by means of interference fits or welds. 7. A shut-off valve according to claim 1, wherein the valve ring is fastened into the valve ring boss by means of a nut threaded onto the valve ring, whereby the peripheral surfaces of the nut and the valve ring boss form a monotonically declining continuous mantle ensuring its complete drainage, and the threaded connection between the nut and the valve ring is sealed by means of an elastic ring. 8. A shut-off valve according to claim 7, wherein the interfacing sealing surface between the valve ring and the valve ring boss, as well as the interfacing sealing surfaces between the nut and the valve ring boss are perpendicular to the valve ring axis, and the valve ring collar and the valve ring boss, as well as the valve ring boss and the valve ring nut are machined to form continuous cylindrical or conical facets straddling the respective sealing surfaces, thereby ensuring that surface discontinuities, which might retain condensate, are eliminated. 9. A shut-off valve according to claim 7, wherein the interfacing sealing surfaces between the valve ring and the valve ring boss, as well as the sealing surfaces between the nut and the valve ring boss are upright conical and the lower sealing surfaces extend to or beyond the outer perimeters of the respective upper sealing surfaces to form parts of the monotonically declining continuous mantles. 10. A shut-off valve according to claim 9, wherein the cone angle of the respective upper sealing surface between the valve ring and the valve ring boss, as well as the cone angle between the valve ring nut and valve ring boss are smaller than the respective cone angles of the lower interfacing sealing surfaces providing single line sealing contacts along the outer perimeter of the upper sealing surface. 11. A control valve for a steam distribution system wherein condensate accumulates as the system is shut down, said control valve comprising a valve body with a valve ring boss, a valve ring inserted into the valve ring boss, the valve ring and the valve ring boss having interfacing sealing surfaces therebetween, said valve ring being inserted from the bottom in such a way that a monotonically declining continuous hollow mantle is formed by the inner perimeter surfaces of the valve ring boss and the valve ring, said mantle declining away from the interfacing sealing surfaces to thereby ensure complete drainage of condensate from the interfacing sealing surfaces and the mantle. 12. A control valve according to claim 11, wherein the interfacing sealing surfaces between the valve ring and the valve ring boss are perpendicular to the valve ring axis, and the surface of the monotonically declining continuous hollow mantle defines a single continuous facet straddling the sealing surface plane. 13. A control vavle according to claim 11, wherein the interfacing sealing surfaces between the valve ring and the valve ring boss are inverted conical and wherein the ring's sealing surface extends inward to or beyond the perimeter of the sealing surface of the vavle ring boss. 14. A control valve according to claim 13, wherein the cone angle of the interfacing sealing surface of the valve ring boss is smaller than the cone angle of the interfacing sealing surface of the valve ring providing a single line sealing contact along the perimeter of the sealing surface of the valve ring boss. 15. A control valve according to any of claims 11 to 14, wherein the valve ring is fastened into the valve ring boss by means of a threaded connection sealed by means of an elastic ring. 16. A control valve according to claim 11, wherein a valve ring is fastened into the valve ring boss by means of a plug via a threaded connection between a plug and the valve ring boss and sealed by an elastic ring, and wherein the interfacing sealing surface between the valve ring and the valve ring boss, as well as between the valve ring and the plug are perpendicular to the valve ring axis, and wherein the monotonically declining continuous hollow mantle defines a single continuous facet straddling the sealing surface plane. 17. A control valve according to claim 16, wherein the respective interfacing sealing surfaces between the valve ring and the valve ring boss, as well as between the valve ring and the plug are inverted conical, and wherein the sealing surfaces at the top of the valve ring and of the plug extend to or beyond the perimeter of the respective sealing surfaces of the valve ring boss and at the bottom of the valve ring forming parts of the monotonically declining continuous hollow mantle. 18. A control valve according to any of claims 11 to 14, wherein the valve ring is fastened into the valve ring boss and sealed by means of interference fits or welds.
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