CN202629197U - Self-operated check valve - Google Patents
Self-operated check valve Download PDFInfo
- Publication number
- CN202629197U CN202629197U CN 201220334286 CN201220334286U CN202629197U CN 202629197 U CN202629197 U CN 202629197U CN 201220334286 CN201220334286 CN 201220334286 CN 201220334286 U CN201220334286 U CN 201220334286U CN 202629197 U CN202629197 U CN 202629197U
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- China
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- valve
- piston
- fixedly connected
- self
- spring
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- Expired - Fee Related
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Abstract
The utility model provides a self-operated check valve which comprises a valve body, a valve stem, a valve flap and a gland box. The self-operated check valve is mainly characterized in that the gland box is fixedly connected with a cylinder body, and the cylinder body is divided into an upper cavity and a lower cavity by a piston; the other end of the valve stem is fixedly connected with the piston; a spring is arranged in the upper cavity, and the lower cavity is connected with a medium inlet through a communication pipeline; the two ends of the spring are respectively fixedly connected with the piston and a cylinder lid; and an open-close spiracle is formed on the cylinder lid. The self-operated check valve has the beneficial effect that when the valve is in a work state, the medium not only acts on the bottom of the valve flap and directly acts on the piston though the communication pipeline at the same time, so that the acting force is increased and the valve is flexible to open; and when a pump stops or failure occurs to the pipeline, the upper cavity is communicated with air, the pressure is stable, no vacuum phenomenon occurs, inlet medium pressure abruptly drops, the valve flap closes quickly under the double functions of the reflux media pressure and the spring, thereby protecting the equipment and accessories.
Description
Technical field
The utility model relates to a kind of valve, particularly relates to a kind of self-powering type safety check.
Background technique
Safety check is a kind of valve commonly used in places such as oil, chemical industry, steam lines.The self-powering type safety check is the elastic force effect that utilizes pressure medium and spring, controls the keying of safety check, and it has characteristics such as simple in structure, easy to install.But present self-powering type safety check medium only acts on flap bottom and comes Open valve, and active force is little, and flow resistance is big, and flexibility ratio is not high, and spring place cavity is Seal cage, is prone to produce vacuum phenomenon, makes that sensitivity is low when closing valve, and speed is slow.
The model utility content
In order to overcome the existing above-mentioned shortcoming of self-powering type safety check, the utility model provide a kind of when driving valve active force big, flow resistance is little, flexibility ratio is high, highly sensitive self-powering type safety check when closing valve.
It is a kind of self-powering type safety check that the utility model solves the technological scheme that its technical problem adopted, and comprises valve body, valve rod, flap, stuffing box, and valve rod is arranged in stuffing box; Stuffing box is fixedly connected with valve body through gland, and filler is placed between stuffing box and the valve rod, through the Gland fixing seal; The valve rod front end is fixedly connected flap, and stuffing box is fixedly connected with a cylinder body, and cylinder body is divided into epicoele and cavity of resorption by a piston; The valve rod the other end is fixedly connected with piston, and spring is set in the epicoele, and cavity of resorption links to each other with the import medium through UNICOM's pipeline; Both ends of the spring is fixedly connected with cylinder cap with piston respectively, has the keying spiracle on the cylinder cap.
The beneficial effect of the utility model is in working order the time, and medium not only acts on the flap bottom, directly acts on piston through UNICOM's pipeline simultaneously, has increased active force, makes that to drive valve flexible, and flow resistance is little; When termination of pumping or pipeline break down, epicoele and air UNICOM, pressure stability can not form vacuum phenomenon, and the inlet pressure medium descends flap quick closedown under reflux medium pressure and spring double reaction plus, protection equipment and annex suddenly.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the present embodiment structural drawing
Among Fig. 1: 1. valve body; 2. flap; 3. valve rod; 4. gland; 5. stuffing box; 6. filler; 7. Gland; 8. piston; 9. spring; 10. cylinder body; 11. cylinder cap; 12. keying spiracle; 13. epicoele; 14. cavity of resorption; 15. UNICOM's pipeline.
Embodiment
As shown in Figure 1, a kind of self-powering type safety check comprises valve body 1, valve rod 3, flap 2, stuffing box 5; Valve rod 3 is arranged in stuffing box 5, and stuffing box 5 is fixedly connected with valve body 1 through gland 4, and filler 6 is placed between stuffing box 5 and the valve rod 1; Through Gland 7 fixing seals, valve rod 3 front ends are fixedly connected flap 2, and stuffing box 5 is fixedly connected with a cylinder body 10; Cylinder body 10 is divided into epicoele 13 and cavity of resorption 14 by a piston 8, and valve rod 3 the other ends are fixedly connected with piston 8, and spring 9 is set in the epicoele 13; Cavity of resorption 14 links to each other with the medium import through UNICOM's pipeline 15, and spring 9 two ends are fixedly connected with cylinder cap 11 with piston 8 respectively, has on the cylinder cap 11 to open and close spiracle 12.
During work, medium gets into from medium inlet, gets into cavity of resorption 14 through UNICOM's pipeline 15, and medium acts on flap 2 bottoms and the piston 8 simultaneously, flexibly Open valve; When termination of pumping or pipeline broke down, the inlet pressure medium descended suddenly, and flap 2 is decline fast under the double reaction plus of reflux medium pressure and spring 8, and realization valve speed is closed.
Claims (1)
1. a self-powering type safety check comprises valve body, valve rod, flap, stuffing box, and valve rod is arranged in stuffing box; Stuffing box is fixedly connected with valve body through gland, and filler is placed between stuffing box and the valve rod, through the Gland fixing seal; The valve rod front end is fixedly connected flap, and it is characterized in that: said stuffing box is fixedly connected with a cylinder body, and said cylinder body is divided into epicoele and cavity of resorption by a piston; The said valve rod the other end is fixedly connected with piston, in the said epicoele spring is set, and said cavity of resorption links to each other with the medium import through UNICOM's pipeline; Said both ends of the spring is fixedly connected with cylinder cap with piston respectively, has the keying spiracle on the said cylinder cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220334286 CN202629197U (en) | 2012-07-11 | 2012-07-11 | Self-operated check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220334286 CN202629197U (en) | 2012-07-11 | 2012-07-11 | Self-operated check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202629197U true CN202629197U (en) | 2012-12-26 |
Family
ID=47382401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220334286 Expired - Fee Related CN202629197U (en) | 2012-07-11 | 2012-07-11 | Self-operated check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202629197U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542142A (en) * | 2012-07-11 | 2014-01-29 | 上海神通企业发展有限公司 | Self-operated check valve |
| CN103742390A (en) * | 2013-11-28 | 2014-04-23 | 成都欧浦特控制阀门有限公司 | Air pump provided with telescopic spring |
-
2012
- 2012-07-11 CN CN 201220334286 patent/CN202629197U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542142A (en) * | 2012-07-11 | 2014-01-29 | 上海神通企业发展有限公司 | Self-operated check valve |
| CN103542142B (en) * | 2012-07-11 | 2016-03-09 | 上海神通企业发展有限公司 | A kind of self-powering type safety check |
| CN103742390A (en) * | 2013-11-28 | 2014-04-23 | 成都欧浦特控制阀门有限公司 | Air pump provided with telescopic spring |
| CN103742390B (en) * | 2013-11-28 | 2015-10-28 | 成都欧浦特控制阀门有限公司 | A kind of air pump being provided with coil tension spring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20121226 Termination date: 20170711 |