CN2682251Y - Double-sealing piston valve - Google Patents
Double-sealing piston valve Download PDFInfo
- Publication number
- CN2682251Y CN2682251Y CN 03270230 CN03270230U CN2682251Y CN 2682251 Y CN2682251 Y CN 2682251Y CN 03270230 CN03270230 CN 03270230 CN 03270230 U CN03270230 U CN 03270230U CN 2682251 Y CN2682251 Y CN 2682251Y
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- China
- Prior art keywords
- valve
- flap
- double
- sealing piston
- piston valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a double-sealing piston valve, belonging to the technical field of a valve. The double-sealing piston valve solves the problems that the structure of the existing piston valve is complicated, and the sealing ring is easily abraded. The double-sealing piston valve comprises a valve body and a valve cap. The valve cap is fastened to the upper part of the valve body, a valve rod penetrates through the valve cap, the outer end of the valve cap is fixedly connected with a hand wheel, and the inner end of the valve cap is provided with a valve flap; the valve flap comprises a valve flap upper body and a valve flap lower body, the valve flap upper body is fixedly connected with the valve flap lower body, and an annular groove is formed on the lateral parts of the valve flap upper body and the valve flap lower body; a non-metal sealing ring is arranged in the annular groove, the inside of the valve body is provided with a valve seat which is cooperated with the valve flap. The double-sealing piston valve is characterized in that the inside of the annular groove is also sheathed with a metal sealing ring, and the metal sealing ring is positioned below the non-metal sealing ring. When the valve flap presses against the valve seat, by the extrusion of the metal sealing ring, the sealing performance of the non-metal sealing ring can be exerted to the maximum. The double-sealing piston valve has good sealing performance and easy open and closure operations; so the practicability is high.
Description
Technical field
The utility model belongs to valve technology field, particularly a kind of piston valve.
Background technique
The existing piston valve is owing to adopt static sealing, and the wearing and tearing of its seal ring are bigger, influence its sealability and working life." piston valve " that Chinese patent 962330302 provides, it comprises parts such as valve body, valve gap, seal ring, seal ring gland, adjustable lever, handwheel.This piston valve is a solution of doing at the problems referred to above.Its lower sealing ring only contacts with outer surface of piston, directly is not subjected to washing away of medium, therefore the working life that can improve product.But the structure of this piston valve is complicated, has increased the cost of product; Simultaneously, because sealability is not well improved, particularly after seal ring uses a period of time wearing and tearing, leakage phenomenon can appear.
Summary of the invention
The purpose of this utility model is in order to overcome the problems referred to above, a kind of double sealing piston valve of new structure to be provided, and makes that it has that sealability is good, the long service life of product, characteristic of reasonable structure.
The purpose of this utility model realizes by following technical proposal: this double sealing piston valve comprises valve body and valve gap, valve gap is fixed in the top of valve body, a valve rod passes valve gap, its outer end handwheel that is being connected, the inner is provided with flap, flap comprises flap upper body and flap lower body, flap upper body and flap lower body are connected, and the sidepiece at both forms an annular groove, nonmetal seal ring is set in annular groove, be provided with the valve seat that matches with flap at valve inner, it is characterized in that going back metal o-ring of socket in the described annular groove, metal o-ring is in the bottom of nonmetal seal ring.
This double sealing piston valve is to contact with the sealing of valve seat by flap to make valve closing.Rotate handwheel,, make the flap oscilaltion by the transmission of valve rod.In the utility model, the sealing between flap and the valve seat not only relies on nonmetal seal ring, has also relied on metal o-ring to realize simultaneously, thereby plays the effect of double seal.
The more important thing is, owing to metal o-ring is socketed on the flap, therefore can be up and down in the annular groove of flap.Like this, when the flap roof pressure is on valve seat, by the extruding of metal o-ring, can also makes nonmetal seal ring that to a certain degree expansion is arranged, thereby bring into play the sealability of nonmetal seal ring to greatest extent.Particularly when nonmetal seal ring used a period of time wearing and tearing to occur, effect was more obvious.
In above-mentioned double sealing piston valve, described valve seat is fixed in valve inner by screw thread.
In above-mentioned double sealing piston valve, it is conical that the outer side surface of described nonmetal seal ring is, and the inner side surface of valve seat has corresponding trochoidal surface.Utilize conical surface, even if some wearing and tearing appear in nonmetal seal ring, can be not influential to sealing yet, therefore can prolong the working life of product.
In above-mentioned double sealing piston valve, described nonmetal seal ring is that material is made by rubber or graphite usually.
In above-mentioned double sealing piston valve, the sealing rib that protrudes is to the inside arranged at the bottom of described valve seat.When the flap roof pressure sealed on valve seat, metal o-ring contacted with the sealing rib of valve seat bottom.
Usually, the side lower part at metal o-ring has a sealing inclined-plane.There is the shape that matches with metal o-ring on surface at the sealing rib.
Compared with prior art, the double sealing piston valve that provides of the utility model is the improvement of being done on existing piston valve base plinth.Owing to adopted double seal, its sealability is greatly improved, even and after nonmetal seal ring uses aging or wearing and tearing of a period of time, also can keep the better seal performance, can also prolong the working life of product; Simultaneously, the conical structure between nonmetal seal ring surface and the valve seat inner side surface makes the opening and closing operations of this piston valve very light, has higher utility.
Description of drawings
Fig. 1 is the sectional view of the double sealing piston valve that provides of the utility model.
Fig. 2 is the sectional view of valve seat, metal o-ring and nonmetal seal ring in the double sealing piston valve that provides of the utility model.
Among the figure, 1, valve body; 2, valve rod; 3, flap; 31, flap upper body; 32, flap lower body; 33, locating stud; 34, annular groove; 4, valve gap; 5, handwheel; 6, valve seat; 61, sealing rib; 7, nonmetal seal ring; 8, metal o-ring; 81, sealing inclined-plane.
Embodiment
As shown in Figure 1, this double sealing piston valve comprises valve body 1, valve gap 4, valve rod 2, flap 3 and handwheel 5 etc.Valve gap 4 is fixed on the valve body 1 by nut.Valve rod 2 passes valve gap 4, its outer end handwheel 5 that is being connected.Between valve rod 2 and the handwheel 5 is joining by screw thread.In the present embodiment, the middle part of valve rod 2 connects by movable joint, when valve rod 2 tops are rotated with handwheel 5, and the only oscilaltion and can not rotating of valve rod 2 bottoms.Therefore, as long as rotate handwheel 5, can make flap 3 oscilaltions of valve rod 2 the inners.Like this, the wearing and tearing of the nonmetal seal ring 7 of flap 3 sides can be dropped to bottom line.
As shown in Figure 1, flap 3 comprises flap upper body 31 and flap lower body 32, and both are fixed together.In the present embodiment, pass through scyewed joint together between flap upper body 31 and the flap lower body 32, and have a locating stud 33 to sell between flap upper body 31 and flap lower body 32.
Sidepiece at flap 3 has an annular groove 34, and nonmetal seal ring 7 and metal o-ring 8 are socketed on wherein successively.In the present embodiment, nonmetal seal ring 7 employing rubber are that material is made.
In the present embodiment, the outer side surface of the inner side surface of valve seat 6 and nonmetal seal ring 7 is trochoidal surface, and cooperatively interacts.This piston valve is exactly to seal by nonmetal seal ring 7 and valve seat 6 inner side surfaces to contact, and makes this valve closing.
As shown in Figure 1, metal o-ring 8 is close to the bottom of nonmetal seal ring 7, just can be up and down in annular groove 34.
As shown in Figure 2, the sealing rib 61 that protrudes is to the inside arranged in the bottom of valve seat 6.When valve was in sealing state, metal o-ring 8 contacted with sealing rib 61.
In the present embodiment, as shown in Figure 2, the side lower part of metal o-ring 8 is a sealing inclined-plane 81.Metal o-ring 8 contacts with sealing rib 61 at these sealing 81 places, inclined-plane.
Claims (7)
1, a kind of double sealing piston valve, comprise valve body (1) and valve gap (4), valve gap (4) is fixed in the top of valve body (1), a valve rod (2) passes valve gap (4), its outer end handwheel (5) that is being connected, the inner is provided with flap (3), flap (3) comprises flap upper body (31) and flap lower body (32), flap upper body (31) is connected with flap lower body (32), and the sidepiece at both forms an annular groove (34), nonmetal seal ring (7) is set in annular groove (34), be provided with the valve seat (6) that matches with flap (3) in valve body (1) inside, it is characterized in that going back a metal o-ring of socket (8) in the described annular groove (34), metal o-ring (8) is in the bottom of nonmetal seal ring (7).
2, double sealing piston valve according to claim 1, it is inner to it is characterized in that described valve seat (6) is fixed in valve body (1) by screw thread.
3, double sealing piston valve according to claim 1 and 2 is characterized in that the outer side surface of described nonmetal seal ring (7) is conical, and the inner side surface of valve seat (6) has corresponding trochoidal surface.
4, double sealing piston valve according to claim 1 and 2 is characterized in that described nonmetal seal ring (7) is that material is made by rubber or graphite.
5, double sealing piston valve according to claim 1 and 2 is characterized in that the sealing rib (61) that protrudes is to the inside arranged at the bottom of described valve seat (6).
6, double sealing piston valve according to claim 5 is characterized in that the side lower part of described metal o-ring (8) has a sealing inclined-plane (81).
7, double sealing piston valve according to claim 1 and 2, it is characterized in that passing through scyewed joint together between described flap upper body (31) and the flap lower body (32), and have a locating stud (33) to sell between flap upper body (31) and flap lower body (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03270230 CN2682251Y (en) | 2003-09-17 | 2003-09-17 | Double-sealing piston valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03270230 CN2682251Y (en) | 2003-09-17 | 2003-09-17 | Double-sealing piston valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2682251Y true CN2682251Y (en) | 2005-03-02 |
Family
ID=34598930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03270230 Expired - Fee Related CN2682251Y (en) | 2003-09-17 | 2003-09-17 | Double-sealing piston valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2682251Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874082A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | Solenoid valve sealing piece and respirator provided with same |
| CN105351533A (en) * | 2015-11-09 | 2016-02-24 | 中铁电气化局集团北京建筑工程有限公司 | Double-seal fire hydrant |
| CN107314119A (en) * | 2017-07-19 | 2017-11-03 | 武汉武船机电模块有限责任公司 | A kind of hull valve |
-
2003
- 2003-09-17 CN CN 03270230 patent/CN2682251Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874082A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | Solenoid valve sealing piece and respirator provided with same |
| CN104874082B (en) * | 2014-02-28 | 2018-11-13 | 北京谊安医疗系统股份有限公司 | Solenoid valve diaphragm seal and lung ventilator with it |
| CN105351533A (en) * | 2015-11-09 | 2016-02-24 | 中铁电气化局集团北京建筑工程有限公司 | Double-seal fire hydrant |
| CN107314119A (en) * | 2017-07-19 | 2017-11-03 | 武汉武船机电模块有限责任公司 | A kind of hull valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050302 Termination date: 20100917 |