IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0554208
(1990-07-17)
|
우선권정보 |
GB-19890016538 (1989-07-20) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
3 |
초록
▼
A gate valve has opposed valve seats respectively held in position by seat holders within an outer body of the valve. Each seat is fitted into the respective holder from the outer side of the latter and retained in position, against displacement, between that holder and the surrounding valve body an
A gate valve has opposed valve seats respectively held in position by seat holders within an outer body of the valve. Each seat is fitted into the respective holder from the outer side of the latter and retained in position, against displacement, between that holder and the surrounding valve body and in sealing engagement with a corresponding sealing/locating recess in the body. On assembly of the valve wedge members are inserted between the seat holders so that the seats are wedged tightly in location positions within the body.
대표청구항
▼
1. A gate valve comprising an outer valve body, an internal valve seat and a seat retainer, wherein the valve seat is held in position by the seat retainer which is fitted within said outer body of the valve, the seat being fitted into the retainer from the outer side of the later and retained in po
1. A gate valve comprising an outer valve body, an internal valve seat and a seat retainer, wherein the valve seat is held in position by the seat retainer which is fitted within said outer body of the valve, the seat being fitted into the retainer from the outer side of the later and retained in position, against displacement, between the retainer and the surrounding valve body, and wherein the seat retainer is in the general form of a hollow bush which is initially a loose fit within the body and is of split form with a longitudinal split into which a wedge member is inserted to expand the retainer radially, on assembly, to provide a tight fit of the retainer within the valve body. 2. A gate valve according to claim 1, wherein the valve seat is rigidly held by the seat retainer in a locating recess in the valve body. 3. A gate valve according to claim 1, wherein the seat has metal-to-metal sealing with respect to the valve body. 4. A gate valve according to claim 3, wherein the seat has a deformable formation which provides said metal-to-metal sealing. 5. A gate valve according to claim 4, wherein the valve seat is rigidly held by the seat retainer in a locating and sealing recess in the valve body and said deformable formation sealingly engages the valve body within said recess. 6. A gate valve according to claim 1, wherein said valve seat is one of two opposed seats between which the valve gate is slidable between valve-open and valve-closed position. 7. A gate valve according to claim 6, wherein the valve gate is split into two parts urged apart, towards and contacting the respective seats, by spring means between the gate parts. 8. A gate valve according to claim 1, wherein said valve seat is one of two opposed seats similarly held position within the valve body by said seat retainer. 9. A gate valve according to claim 1, wherein the gate floats, in a direction normal to the seat, within an actuating yoke by which it is movable between the open and closed positions. 10. A gate valve comprising an outer valve body, two opposed internal valve seats, a seat retainer and a valve gate slidable between said seats between valve-open and valve-closed positions, said valve seats being held in position by the seat retainer which is fitted within said outer body of the valve and comprises two similar seat holders in which said opposed seats are respectively held, each said seat being fitted into the corresponding one of said seat holders from the outer side thereof and retained in position against displacement, between the seat retainer and the surrounding valve body, wedge members being inserted between the seat holders at opposite sides of said gate. 11. A gate valve according to claim 10, wherein two wedge members are respectively oppositely inserted at each side of the gate between the seat holders. 12. A gate valve according to claim 11, wherein the seat retainer is in the general form of a fitting bush split diametrically to provide said two seat holders and the wedge members are taper pins, at each side of the gate one of the taper pins being a screw-threaded pin and the other a plain pin. 13. A gate valve according to claim 10, wherein the wedge members are of arcuate cross-sectional form and fit closely to the valve body. 14. A gate valve comprising an outer valve body, an internal valve seat, a seat retainer and a valve gate cooperating with the valve seat, wherein the valve seat is held in position by the seat retainer which is fitted within said outer body of the valve, the seat being fitted into the retainer from the outer side of the latter and retained in position, against displacement, between the retainer and the surrounding valve body, and means provided to supply sealant to the valve seat at the gate comprise at least one sealant reservoir rechargeable from outside the valve and provided with a piston subject to internal valve pressure, which pressure tends to feed the sealant from the reservoir into at least a continuous sealing groove in the surface of the seat, the gate having sealant bridging holes or grooves through which the sealant reservoir communicates with the sealant groove only when the gate is in a valve-closed position relative to the seat. 15. A gate valve comprising an outer valve body, an internal valve seat and a seat retainer, wherein the valve seat is held in position by the seat retainer which is fitted within said outer body of the valve, the seat being fitted into the retainer from the outer side of the latter and retained in position, against displacement, between the retainer and the surrounding valve body, and wherein a blind bore in the seat retainer and in which a floating piston is slidably disposed provides a hydraulic spring, the blink bore being open to the internal body volume of the valve and containing an appropriately compressible fluid.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.