CN100419313C - Double seal gate valve - Google Patents
Double seal gate valve Download PDFInfo
- Publication number
- CN100419313C CN100419313C CNB2006101340449A CN200610134044A CN100419313C CN 100419313 C CN100419313 C CN 100419313C CN B2006101340449 A CNB2006101340449 A CN B2006101340449A CN 200610134044 A CN200610134044 A CN 200610134044A CN 100419313 C CN100419313 C CN 100419313C
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- Prior art keywords
- valve
- sealing
- ring
- wedge
- valve body
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Abstract
The double seal gate valve has two valve plates in the square head of the lead screw, one wedge fitting the slants in the valve plates, one valve body with positioning pin in the bottom, one sealing seat embedded to the inner side of the valve body, one curved sealing ring in the junction between the valve body and valve cover, one sealing graphite ring inside the hole of the valve cover, etc. Turning the lead screw to move the valve plates and the wedge downwards will make the positioning pin push the wedge and extrude the valve plates sideward to the sealing seat for sealing. The present invention has simple structure, high sealing performance, high reliability and long service life, and is used in pipeline for conveying high and low pressure medium.
Description
One, technical field
What the present invention relates to is a kind of valve that is used for connecting or disconnecting the medium that pipeline carries in the pipeline, specifically a kind of double seal gate valve of being connected on.
Two, background technique
The function of gate valve is to be used for connecting or disconnecting the medium carried in the pipeline, during fed sheet of a media, requires the contact position of valve gap and valve body and the contact position of valve gap and rotary screw that dielectric leakage mustn't be arranged; When stopping medium transport, require the sealing of valve plate and valve seal seat superior, the seal request to the junction of gate valve when particularly carrying high-pressure medium is higher.Before the present invention proposed, the valve gap of gate valve generally was directly to contact with valve body, and rubber seal is adopted in the sealing of contact position, and rubber is easily aging, loses sealing effect easily after use a period of time; What the sealing of valve gap and rotary screw contact position was adopted is packing seal, and the gland sealed deficiency is to use the life-span short, and sealing effect is bad; Valve plate and valve seal seat adopt straight wedge-type sealing usually, the structure of valve plate is a wedge shape, the valve seal seat also must be processed into the inclined-plane and match with it, the place, inclined-plane that the wedge shape of valve plate directly is inserted into sealing seat seals, this kind structure one is the sealing seat processed complex, the 2nd, the machining accuracy of fitting surface is difficult to guarantee, causes leakage during closed condition easily, influences sealing effect.
Three, summary of the invention
In order to solve the deficiencies in the prior art, be the medium of carrying in connection or the cut-out pipeline no matter the purpose of this invention is to provide a kind of, can both play the double seal gate valve of excellent sealing effect, and processing technology is simple, long service life.
Realize that the technological scheme that purpose of the present invention adopts is: the square toes place card of square toes screw mandrel lower end has two symmetrical valve plates, the outside of valve plate is the plane with fine degree of finish and planeness, there are Ka Tai and inclined-plane in the inboard, the wedge-shaped blocks that the last card of Ka Tai has its sphenoid surface to match with the valve plate inclined-plane; The valve body inner bottom part is equipped with the locating column that can hold out against wedge-shaped blocks when valve plate is sealed sealing seat, the sealing seat that closely contacts with the outer side plane of two valve plates when the inboard of turnover medium holes studs with sealing on the valve body; There is the metal o-ring of realizing excellent sealing with the valve gap curve fitting centre at valve body conical surface place and valve gap conical surface place, and valve gap and metal o-ring are by the bolt compression fit; The valve gap endoporus is equipped with the carbon seal ring that is sealed and matched with screw mandrel and the metal ring of falling the matrix, and the valve gap sidetracking that communicates with medium has and communicates with metal ring and to the exert pressure inclined hole of top tight sealing circle realization excellent sealing of metal ring.The handwheel on rotary screw rod top, screw mandrel moves down, and orders about valve plate simultaneously, wedge-shaped blocks moves down, and the valve plate plane contacts with sealing seat, blocks and passes in and out medium holes on the valve body, and this moment, pushed up on the locating column lower end surface of wedge-shaped blocks; When screw mandrel continued to move down, the sphenoid surface of wedge-shaped blocks forced two valve plates to push to both sides, compresses sealing seat and seals.
The present invention compared with prior art has following beneficial effect:
1, makes seal ring seal screw mandrel better by inclined hole to the carbon seal ring pressurization, improved the sealing effect at this place, prolonged the working life of seal ring.
2, the curved surface metal o-ring that studs with of valve body upper end-hole place contacts with the valve gap line, and surface of contact is little, and pressure is big, is difficult for leaking good seal performance, long service life.
3, the surface of contact of valve plate and sealing seat is the plane all, and processing technology is simple, reaches perfect precision and usability easily, can guarantee sealing effect.
4, locating column heads on wedge-shaped blocks and forces two valve plates to move to both sides are parallel, and two valve plates are closely contacted with the sealing seat end face, can realize good sealing effect; And this kind structure is difficult for making valve plate, seal ring contact surface abrasion, has prolonged the working life of Sealing.
In a word, double seal gate valve of the present invention is simple in structure, and good seal performance is safe and reliable, and long service life is mounted in and is used to carry the more satisfactory gate valve of various high low pressure media in the pipeline.
Four, description of drawings
Fig. 1 is the half section structural drawing of double seal gate valve of the present invention.
Fig. 2 is the double seal gate valve metal ring of falling the matrix of the present invention place partial enlarged drawing.
Five, embodiment
In the accompanying drawings, double seal gate valve of the present invention mainly is made up of valve body, valve gap, handle, square toes screw mandrel, valve plate, sealing seat, seal ring, wedge-shaped blocks and locating column; The square toes place card of square toes screw mandrel 22 lower ends of gate valve has two symmetrical valve plates 6, the outside of valve plate 6 is the planes with fine degree of finish and planeness, there are card platform 25 and inclined-plane 16 in the inboard, the wedge-shaped blocks 7 that card has its sphenoid surface to match with valve plate inclined-plane 16 on the card platform 25; Valve body 1 inner bottom part is equipped with the locating column 2 that can hold out against wedge-shaped blocks when valve plate is sealed sealing seat, the sealing seat 5 that closely contacts with the outer side plane of two valve plates when the inboard of turnover medium holes studs with sealing on the valve body 1, sealing seat 5 both ends of the surface stud with high temperature high voltage resistant seal ring 4, further strengthen sealing effect; The annular pleat shape pad 3 that helps the seat sealing between sealing seat 5 and the valve body 1; The effect of pleat shape pad 3 is end face and the valve plate contact seal better of adjusting sealing seat.There is the metal o-ring 8 of realizing excellent sealing with valve gap 10 curve fittings the centre at valve body 1 conical surface place and valve gap 10 conical surface places, and valve gap 10 leans on bolt 9 compression fit with metal o-ring 8; The curve contact matching makes surface of contact little, and pressure is big, is difficult for leaking good seal performance, long service life.Valve gap 10 endoporus are equipped with carbon seal ring 13 and the metal ring of falling the matrix 27 that is sealed and matched with screw mandrel 22, valve gap 10 sidetracking that communicates with medium has the inclined hole 11 that communicates with metal ring 27 and exert pressure top tight sealing circle 13 for metal ring 27, hold out against is in order to make seal ring seal screw mandrel better, improve the sealing effect at this place, prolonged the working life of seal ring.Be screwed with on the upper end screw thread of valve gap 10 and support back of the body cap 12, support back of the body cap 12 upper supports swivel nut 14 is arranged, thrust bearing 17 is housed in the swivel nut 14, pump nozzle 19 is equipped with in the side, between swivel nut 14 and the carbon seal ring 13 gland 15 is arranged, the upper end of swivel nut 14 is fixed with bearing gland 21 by screw 20; The screw 18 that leans on thrust bearing 17 to support matches with screw mandrel 22 and the cylindrical secure fit has the handle 23 that screw is rotated, and the upper end of screw is screwed with the dustproof helmet 24 of going up; The turnover media port place of valve body 1 is covered with helmet 26.When stopping fed sheet of a media, the handwheel on rotary screw rod top drives the screw rotation, the screw mandrel that matches with screw is moved down, order about valve plate simultaneously, wedge-shaped blocks moves down, the valve plate plane contacts with sealing seat, block and pass in and out medium holes on the valve body, this moment, pushed up on the locating column lower end surface of wedge-shaped blocks; Rotate screw again when making screw mandrel continue to move down, the sphenoid surface of wedge-shaped blocks forces two valve plates to push to both sides, compresses sealing seat and seals.
Claims (2)
1. a double seal gate valve mainly is made up of valve body, valve gap, handle, square toes screw mandrel, valve plate, sealing seat, seal ring, wedge-shaped blocks and locating column; It is characterized in that: the square toes place card of square toes screw mandrel (22) lower end of gate valve has two symmetrical valve plates (6), the outside of valve plate (6) is the plane with fine degree of finish and planeness, there are Ka Tai (25) and inclined-plane (16) in the inboard, and Ka Tai (25) goes up the wedge-shaped blocks (7) that card has its sphenoid surface to match with the valve plate inclined-plane; Valve body (1) inner bottom part is equipped with the locating column (2) that can hold out against wedge-shaped blocks when valve plate is sealed sealing seat, and the inboard that valve body (1) is gone up the turnover medium holes studs with the sealing seat (5) that closely contacts with the outer side plane of two valve plates when sealing; There is the metal o-ring (8) of realizing excellent sealing with valve gap (10) curve fitting the centre at valve body (1) conical surface place and valve gap (10) conical surface place, and valve gap (10) leans on bolt (9) compression fit with metal o-ring (8); Valve gap (10) endoporus is equipped with carbon seal ring (13) and the metal ring of falling the matrix (27) that is sealed and matched with screw mandrel (22), and valve gap (10) sidetracking that communicates with medium has and communicates with metal ring (27) and to the exert pressure inclined hole (11) of top tight sealing circle (13) of metal ring (27).
2. double seal gate valve as claimed in claim 1 is characterized in that: described sealing seat (5) both ends of the surface stud with high temperature high voltage resistant seal ring (4), help the annular pleat shape pad (3) of seat sealing between sealing seat (5) and the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101340449A CN100419313C (en) | 2006-10-21 | 2006-10-21 | Double seal gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101340449A CN100419313C (en) | 2006-10-21 | 2006-10-21 | Double seal gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1945071A CN1945071A (en) | 2007-04-11 |
| CN100419313C true CN100419313C (en) | 2008-09-17 |
Family
ID=38044602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101340449A Expired - Fee Related CN100419313C (en) | 2006-10-21 | 2006-10-21 | Double seal gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100419313C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907281B (en) * | 2010-06-28 | 2014-04-02 | 海洋王照明科技股份有限公司 | Extruded sealing structure of charging port, shell and light fitting |
| CN108331928A (en) * | 2018-04-04 | 2018-07-27 | 盐城雄威石化通用机械设备有限公司 | The hard metallic seal slurry valve of high-pressure well mouth |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4836243A (en) * | 1988-02-29 | 1989-06-06 | Otis Engineering Corporation | Gate valve with hydraulic actuator |
| CN2077064U (en) * | 1990-07-21 | 1991-05-15 | 温州市防爆电器元件厂 | Fast shearing-off sluice valve |
| US5377955A (en) * | 1994-02-15 | 1995-01-03 | Baker; Dwight | Gate valve |
| CN2210984Y (en) * | 1995-02-09 | 1995-10-25 | 朱平 | Double-sealing wedge-type sluice valve |
| CN2240653Y (en) * | 1995-11-01 | 1996-11-20 | 浙江保一阀门厂 | Plain plate gate valve |
| CN2245695Y (en) * | 1995-10-16 | 1997-01-22 | 杨绍贵 | Double-sealing plate sluice valve |
-
2006
- 2006-10-21 CN CNB2006101340449A patent/CN100419313C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4836243A (en) * | 1988-02-29 | 1989-06-06 | Otis Engineering Corporation | Gate valve with hydraulic actuator |
| CN2077064U (en) * | 1990-07-21 | 1991-05-15 | 温州市防爆电器元件厂 | Fast shearing-off sluice valve |
| US5377955A (en) * | 1994-02-15 | 1995-01-03 | Baker; Dwight | Gate valve |
| CN2210984Y (en) * | 1995-02-09 | 1995-10-25 | 朱平 | Double-sealing wedge-type sluice valve |
| CN2245695Y (en) * | 1995-10-16 | 1997-01-22 | 杨绍贵 | Double-sealing plate sluice valve |
| CN2240653Y (en) * | 1995-11-01 | 1996-11-20 | 浙江保一阀门厂 | Plain plate gate valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1945071A (en) | 2007-04-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LIAONING JIN-XING PETROLEUM MACHINERY CO., LTD. Free format text: FORMER NAME: LIAOXING PETROLEUM MACHINERY CO., LTD.;LIAONING PROVINCE |
|
| CP03 | Change of name, title or address |
Address after: The Haihe River Road North Industrial Park, 125003 Liaoning Province, Huludao Economic Development Zone No. 68 Patentee after: LIAONING JINXING PETROLEUM MACHINERY CO., LTD. Address before: 125125 Liaoning Province, Xingcheng city Huashan Street four village Jinhua metal component factory Patentee before: Liaoning Liaoxing Petroleum Machinery Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20161021 |