IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0101139
(2002-03-19)
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발명자
/ 주소 |
- Koester, David John
- Dvorak, Sarah Lynn
- Mahncke, Lynn Dean
- Bell, Brandon Wayne
- Bovee, Loree Lee
- Witt, Gary Alan
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출원인 / 주소 |
- Fisher Controls International, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
27 인용 특허 :
10 |
초록
▼
A control valve of the ball type with bi-directional shutoff capabilities is disclosed. The ball valve including an inlet and an outlet, a ball element and a seal assembly. When closing the valve, the ball element, which is eccentrically mounted on a shaft, rotates to abut the seal assembly. While c
A control valve of the ball type with bi-directional shutoff capabilities is disclosed. The ball valve including an inlet and an outlet, a ball element and a seal assembly. When closing the valve, the ball element, which is eccentrically mounted on a shaft, rotates to abut the seal assembly. While closed, the seal assembly including a seal housing, a main seal and a resilient member, contacts the ball element at the main seal, while the resilient member biases the main seal toward the ball element. The seal assembly further includes a secondary flowpath between the main seal and seal housing, which is restricted by two unidirectional seal rings.
대표청구항
▼
1. A valve, comprising:a housing having an inlet and an outlet in fluid communication with a bore therethrough, the bore defining a primary flowpath; a ball element eccentrically mounted in the housing and adapted to move between a closed position, fluidically disconnecting the inlet from the outlet
1. A valve, comprising:a housing having an inlet and an outlet in fluid communication with a bore therethrough, the bore defining a primary flowpath; a ball element eccentrically mounted in the housing and adapted to move between a closed position, fluidically disconnecting the inlet from the outlet, to an open position, fluidically connecting the inlet and outlet; and a seal assembly disposed within the housing, the seal assembly comprising a seal housing and a biased main seal such that a secondary flowpath is defined between the seal housing and the biased main seal wherein the biased main seal is disposed within the primary flowpath and adapted to engage with the ball element during the opening and closing of the valve, the seal assembly further comprising a bi-directional seal disposed between the biased main seal and the seal housing wherein the bi-directional seal substantially impedes flow through the secondary flowpath. 2. The valve of claim 1, wherein the ball element includes a V-shaped notch.3. The valve of claim 1, wherein a sealing body, within the seal assembly includes an offset interior surface adapted to compensate for the eccentric placement of the ball element.4. The valve of claim 3, wherein an alignment device radially locates the offset interior surface relative to the ball element.5. The valve of claim 1, wherein the seal assembly is adapted to seal the valve against flow entering from at least one of the inlet and the outlet.6. The valve of claim 1, wherein the bias is created by a resilient member.7. The valve of claim 6, wherein the resilient member is a wave spring.8. The valve of claim 1, wherein the bi-directional seal includes a first and a second elastic sealing ring.9. The valve of claim 8, wherein the first and second elastic sealing rings are adapted to align the main seal to the ball element.10. The valve of claim 8, wherein the sealing rings are U-shaped in cross-section and oriented in opposing relation.11. The valve element of claim 6, wherein the main seal is moved by the biasing resilient member into engagement with the ball when in the closed position.12. The valve of claim 1, wherein the valve assembly includes a first calculated gap disposed between the main seal and the seal housing, accessible from an exterior of the valve assembly thereby providing a means to measure second calculated gap disposed between the main seal and the housing wherein the second calculated gap controls the angle of engagement between the ball element and the main seal.13. The valve of claim 12, wherein the main seal is moved by the biasing resilient member against the housing while the valve is in the open position, thereby preventing the packing of the calculated second gap.14. The valve of claim 1, wherein the valve assembly includes a ridge thereby diverting a fluid flow over the main seal.15. The valve of claim 14, wherein the main seal is restricted in movement in direction towards the ball element by the housing and away from the ball element by the seal housing.16. A valve, comprising:a housing having an inlet and an outlet in fluid communication with a bore therethrough, the bore defining a primary fluid flowpath; a seal assembly mounted proximate to a ball element such that the ball element moves in a rotary motion relative to the seal assembly to engage the seal assembly during the opening and closing of the valve, the seal assembly including a secondary flowpath therethrough; and a first and a second elastic sealing ring impeding the flow through the secondary flowpath. 17. The valve of claim 16, wherein the first and the second elastic sealing rings are adapted to seal the valve against flow entering from at least one of the inlet and the outlet.18. The valve of claim 16, wherein the first and the second elastic sealing rings are integrally formed.19. The valve of claim 16, wherein the first and second elastic sealing rings are adapted to align the ball element to the seal assembly.20. The valve of claim 16, wherein the sealing rings are U-shaped in cross-section and oriented in opposing relation.21. The valve of claim 16, wherein the seal assembly includes a main seal and a seal housing with a biasing resilient member therebetween.22. The valve of claim 21, wherein the resilient member is a wave spring.23. A method of operating a valve, comprising:providing a valve body having an inlet and an outlet forming a primary flowpath; eccentrically mounting a ball element relative the valve body, between the inlet and the outlet; biasing a seal assembly, the seal assembly including a main seal and a bi-directional seal, such that the main seal provides a seal against the ball element to impede flow through the primary flowpath during the opening and closing of the valve and the bi-directional seal provides a seal against a secondary flowpath within the seal assembly; providing a first gap, disposed between the main seal and a seal housing measuring a height of the first gap thereby controlling an angle of engagement between the ball element and the main seal; and rotating the ball element from a open position to a closed position. 24. The method of claim 23, further including the steps of mounting the sealing assembly proximate the ball element and moving the ball element out of engagement with the sealing assembly while performing the rotating step.25. The method of claim 23, further including the step of preventing fluid flow through at least one of the valve inlet and outlet when the valve is in the closed position.26. The method of claim 23, wherein the bi-directional seal includes first and second elastomeric sealing rings within the secondary flowpath.27. The method of claim 23, wherein measuring the height of the first gap includes measuring a height of the second gap disposed between the seal housing and the main seal.28. The method of claim 23, further including the step of biasing the main seal toward the housing while the valve is in the open position, thereby preventing the packing of the first gap.29. The method of claim 23, further including the step of sheltering the main seal from a fluid flow with a ridge located on the seal assembly.30. The valve of claim 29, further including the step of restricting the movement of the main seal in direction towards the ball element by the housing and away from the ball element by the ridge.31. A method of operating a valve, comprising:providing a valve body having an inlet, an outlet and a seal assembly, wherein the seal assembly comprises a main seal, a seal housing, and a bi-directional seal such that the bi-directional seal substantially impedes fluid flow through a flowpath defined between the main seal and the seal housing; biasing the main seal toward a ball element; eccentrically mounting the ball element in the valve body such that the ball element rotatably engages the main seal; and measuring a gap between the seal housing and the main seal to insure proper tolerances, the gap being accessible from an exterior surface of the valve. 32. The method of claim 31, wherein the measured gap is set by moving ball element and setting the actuator or actuator linkage accordingly.33. A method of operating a valve, comprising:providing a valve body having an inlet, an outlet and a seal assembly, the seal assembly including a main seal and a bi-directional seal, such that the main seal provides a seal to impede flow through a primary flowpath during the opening and closing of the valve and the bi-directional seal provides a seal against a secondary flowpath within the seal assembly; biasing the main seal toward a ball element; eccentrically mounting the ball element in the valve body such that the ball element rotatably engages the main seal during valve operation; and limiting the engagement of the main seal with the ball element, while rotating the ball element with respect to the seal assembly from a closed to an open position by providing a calculated stop for the main seal. 34. The method of claim 33, wherein the stop is a ledge of the valve body.35. A method of operating a valve, comprising:providing a valve body having an inlet, an outlet, and a seal assembly, wherein the seal assembly includes a main seal, a seal housing, and a bi-directional seal; biasing the main seal toward a ball element mounted proximate to the valve body; rotating the ball element relative to the main seal while simultaneously moving the ball element in a direction normal to the main seal, a primary flowpath of varying dimensions being created between the ball element and the main seal, the ball element tending to shear any particles, in a medium passing through the flowpath, against the main seal as the ball element rotatably engages the main seal and a secondary flowpath being defined between the main seal and the seal housing wherein the bi-directional seal ring substantially impedes flow therethrough. 36. The method of claim 35, wherein the ball element is mounted accentrically.
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