IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0446012
(2012-04-13)
|
등록번호 |
US-8702056
(2014-04-22)
|
발명자
/ 주소 |
- Crochet, Sr., Kevin W.
- Eger, Norman
- Rovira, III, Sideny A.
|
출원인 / 주소 |
- Aegis Flow Technolofies, L.L.C.
|
대리인 / 주소 |
Roy Kiesel Ford Doody & Thurmon APLO
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
13 |
초록
▼
A plug valve and stem sealing assembly capable of preventing leakage under demanding environmental and operating conditions while also improving the reliability of the valve seal. The valve includes a body, a flow-element, a bonnet and a self-adjusting stem sealing assembly. The body has a first por
A plug valve and stem sealing assembly capable of preventing leakage under demanding environmental and operating conditions while also improving the reliability of the valve seal. The valve includes a body, a flow-element, a bonnet and a self-adjusting stem sealing assembly. The body has a first port and a second port with a passage configured to flow a media extending between the first port and the second port. The flow-element is positioned between the first and second port and has a stem configured to actuate the flow-element between a closed position and an open position. The bonnet may be secured to the valve body and configured to secure the flow-element and stem sealing assembly in position. The self-adjusting stem sealing assembly is positioned adjacent to the stem and is configured to prevent media leakage from the valve.
대표청구항
▼
1. A valve comprising: a. a body having a first port and a second port with a passage configured to flow a media extending between said first port and said second port;b. a flow-element positioned between said first port and said second port, wherein said flow-element has a stem configured to actuat
1. A valve comprising: a. a body having a first port and a second port with a passage configured to flow a media extending between said first port and said second port;b. a flow-element positioned between said first port and said second port, wherein said flow-element has a stem configured to actuate said flow-element between a closed position and an open position;c. a self-adjusting stem sealing assembly adjacent to said stem and configured to prevent media leakage from the valve, wherein said stem sealing assembly comprises: i. a primary seal seated in an annular space defined by the area between said stem, said body and said bonnet, said primary seal comprising: a bottom sealing element;a top sealing element,a primary force transmitting surface; anda primary force transmitting member configured to transfer a first axial load to said primary force transmitting surface, wherein said primary force transmitting surface is configured to transfer said first axial load to said bottom sealing element and said top sealing element to create a seal between said body and said stem;ii. a secondary seal comprising: a packing configured to expand radially to form a seal with said stem:a secondary force transmitting surface; anda secondary force transmitting member configured to transfer a second axial load to said secondary force transmitting surface, wherein said secondary force transmitting surface is configured to transfer said second axial load to said packing thereby creating a seal between said stem and said primary seal;iii. a tertiary seal; andd. a bonnet secured to said body and configured to secure said flow-element and stem sealing assembly into position. 2. The valve of claim 1, wherein said bottom sealing element is seated at the bottom of the annular space defined by the area between said stem, said body and said bonnet. 3. The valve of claim 1, wherein said top sealing element is seated within the annular space and positioned on top of said bottom sealing element. 4. The valve of claim 1, wherein said packing is configured to fit within an annular cavity defined by the area between said top sealing element and said stem. 5. The valve of claim 1, wherein said bonnet is configured to act as a force loading element and transfer a preload force to the primary and secondary force transmitting members. 6. The valve of claim 1, wherein said tertiary seal is configured to substantially eliminate any atmospheric media from entering the primary and secondary seals. 7. The valve of claim 1, wherein said primary force transmitting member and secondary transmitting member are belleville springs. 8. The valve of claim 1, wherein said valve has a corrosion resistant liner secured to the surface of the valve and to the surface of the flow-element, wherein said liner is secured to the surface of said valve by a series of dovetail groves and interlocking holes. 9. The valve of claim 1, wherein said flow-element is a plug configured to regulate the media flow through said passage. 10. A self-adjusting stem seal assembly for a plug valve having a body with a first port, a second port and a passage configured to flow a media extending between said first port and said second port, a flow-element positioned between said first port and said second port, wherein said flow-element has a stem configured to actuate said flow-element between a closed position and an open position and a bonnet secured to said body, wherein said stem seal assembly is adjacent to said stem and is configured to prevent media leakage from the valve, said stem seal assembly comprising: a. a primary seal seated in an annular space defined by the area between said stem, said body and said bonnet, said primary seal comprising: i. a primary sealing component comprising; a bottom sealing element:a top sealing element,ii. a primary force transmitting component, wherein said primary force transmitting component comprises a primary force transmitting surface and a primary force transmitting member configured to transfer a first axial load to said primary force transmitting surface, wherein said primary force transmitting surface is configured to transfer said first axial load to said bottom sealing element and said top sealing element to create a seal between the said body and said stem;b. a secondary seal comprising: i. a packing configured to expand radially to form a seal with said stem;ii. a secondary force transmitting component, wherein said secondary force transmitting component comprises a secondary force transmitting surface; and a secondary force transmitting member configured to transfer a second axial load to said secondary force transmitting surface, wherein said secondary force transmitting surface is configured to transfer said second axial load to said packing thereby creating a seal between said stem and said primary seal; andc. a tertiary seal. 11. The self-adjusting stem seal assembly of claim 10, wherein: a. said bottom sealing element is seated at the bottom of the annular space defined by the area between said stem, said body and said bonnet; and,b. said top sealing element is seated within the annular space and positioned on top of said bottom sealing element. 12. The self-adjusting stem seal assembly of claim 11, wherein said packing is configured to fit within an annular cavity defined by the area between said primary seal and said stem. 13. The self-adjusting stem seal assembly of claim 10, wherein said primary force transmitting member and secondary transmitting member are belleville springs. 14. The valve of claim 10, wherein said flow-element is a plug configured to regulate the media flow through said passage. 15. A plug valve comprising: a. a body having a first port and a second port with a passage configured to flow a media extending between said first port and said second port;b. a flow-element positioned between said first port and said second port, wherein said flow-element has a stem configured to actuate said flow-element between a closed position and an open position;c. a stem sealing assembly configured to prevent media leakage from the valve, said stem sealing assembly comprising: i. a primary seal comprising: a bottom sealing element;a top sealing element;a primary force transmitting surface;a primary force transmitting member configured to transfer a first axial load to said primary force transmitting surface, wherein said primary force transmitting surface is configured to transfer said first axial load to said bottom sealing element and said top sealing element to create a seal between said body and said stem;ii. a secondary seal;iii. a tertiary seal; andd. a bonnet secured to said body. 16. The plug valve of claim 15 wherein said bonnet is configured to act as a force loading element to transfer a preload force to said stem sealing assembly. 17. The plug valve of claim 16 wherein said bonnet comprises: a. a primary force loading element; andb. a secondary force loading element. 18. The plug valve of claim 15, wherein said primary seal is configured to be self-adjusting and capable of dynamically compensating for wear. 19. The plug valve of claim 15, wherein said secondary seal is configured to be self-adjusting and capable of dynamically compensating for wear. 20. The plug valve of claim 15, wherein said secondary seal comprises: a. a packing;b. a secondary force transmitting surface; andc. a secondary force transmitting member configured to transfer a second axial load to said secondary force transmitting surface, wherein said secondary force transmitting surface is configured to transfer said second axial load to said packing.
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