CN201723791U - Backfire-prevention valve - Google Patents
Backfire-prevention valve Download PDFInfo
- Publication number
- CN201723791U CN201723791U CN2010201978748U CN201020197874U CN201723791U CN 201723791 U CN201723791 U CN 201723791U CN 2010201978748 U CN2010201978748 U CN 2010201978748U CN 201020197874 U CN201020197874 U CN 201020197874U CN 201723791 U CN201723791 U CN 201723791U
- Authority
- CN
- China
- Prior art keywords
- valve
- backfire
- way valve
- air inlet
- valve body
- Prior art date
- 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 relates to a backfire-prevention valve. Both ends of a valve body are provided with an air inlet and an air outlet, the outer ends of the air inlet and the air outlet are provided with inversed supporting rods for preventing rubber pipes from dropping, a one-way valve seat and a one-way valve are arranged in the valve body, and a return spring and a spring stop pin are arranged on the one-way valve. The backfire-prevention valve can timely prevent the generation of backfire when a welding gun is blocked, thereby avoiding generating dangers.
Description
Technical field
The utility model relates to a kind of being contained in and prevents the device anti backfire valve that tempering is blasted in the wind welded tube road.
Background technique
Present wind welder in usefulness, what use is the mixed gas of acetylene and oxygen, lead on the welding gun to light after mixing by two sebific ducts and weld, if welding gun has obstruction slightly, misoperation promptly can produce and be tempered to oxygen and acetylene cylinder, to such an extent as to blast, stops tempering when welding gun is stopped up, avoiding dangerous, is the problem that people are inquiring into.
Summary of the invention
In order to solve the problem of above-mentioned proposition, the utility model provides a kind of anti backfire valve, and this anti backfire valve can in time stop the generation tempering when welding gun stops up, and avoids dangerous and takes place.
The purpose of this utility model is to realize like this, anti backfire valve, be provided with air inlet at the valve body two ends, the air outlet, the air inlet/outlet outer end is provided with the anti-sebific duct thorn in an opposite direction that comes off down, be provided with unidirectional valve seat in the valve body, one-way valve, return spring is housed on the one-way valve, spring resistance pin is contained in anti backfire valve in the supply air line, and the sub-suction port of pressed gas enters, under the effect of gas pressure, overcome the elastic force of return spring, gas backs down one-way valve, enters welding gun and normally welds, when stopping up appears in welding gun, when reverse tempering, one-way valve seals pipeline to the pressure of tempering under tempering pressure and return spring effect greater than suction pressure, thereby avoids being tempered to gas tank generation blast.
Characteristics of the present utility model are, and are rational in infrastructure, simple to operate, safe and reliable.
Description of drawings
Figure is a structural representation of the present utility model.
Among the figure: 1, valve body; 2, suction port; 3, one-way valve; 4, return spring; 5, spring resistance pin; 6, air outlet; 7, sting in an opposite direction; 8, valve seat.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
In each view, be provided with air inlet 2 at valve body 1 two ends, air outlet 6, the air inlet/outlet outer end is provided with anti-sebific duct and comes off and sting 7 in an opposite direction, be provided with unidirectional valve seat 8 in the valve body 1, one-way valve 3, return spring 4 is housed on the one-way valve 3, spring resistance pin 5, anti backfire valve is contained in the supply air line, pressed gas enters at suction port 2, under the effect of gas pressure, has overcome the elastic force of return spring 4, gas backs down one-way valve 3, enter welding gun and normally weld, when welding gun occur to stop up, the pressure of tempering greater than suction pressure when reverse tempering, one-way valve 3 seals pipeline under tempering pressure and return spring 4 effects, thereby avoids being tempered to gas tank generation blast.
Claims (3)
1. anti backfire valve, it is characterized in that: the valve body two ends are provided with air inlet, air outlet, are provided with unidirectional valve seat, one-way valve in valve body.
2. anti backfire valve according to claim 1 is characterized in that: the air inlet/outlet outer end is provided with down thorn in an opposite direction.
3. anti backfire valve according to claim 1 is characterized in that: return spring, spring resistance pin are housed on the one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201978748U CN201723791U (en) | 2010-05-11 | 2010-05-11 | Backfire-prevention valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201978748U CN201723791U (en) | 2010-05-11 | 2010-05-11 | Backfire-prevention valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201723791U true CN201723791U (en) | 2011-01-26 |
Family
ID=43492121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201978748U Expired - Fee Related CN201723791U (en) | 2010-05-11 | 2010-05-11 | Backfire-prevention valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201723791U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090388A (en) * | 2012-12-27 | 2013-05-08 | 宁波市江北兴达焊割减压仪表厂 | Sliding type temper resistant cutting torch |
| CN103437916A (en) * | 2013-08-30 | 2013-12-11 | 东风商用车有限公司 | Anti-tempering safety valve of engine |
| CN107781491A (en) * | 2017-12-07 | 2018-03-09 | 湖北中瑞天恒节能科技发展有限公司 | Gas valve and anti-backfire kitchen range |
| CN111336341A (en) * | 2020-03-20 | 2020-06-26 | 海洋石油工程（青岛）有限公司 | Automatic management equipment for gas zone state |
-
2010
- 2010-05-11 CN CN2010201978748U patent/CN201723791U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090388A (en) * | 2012-12-27 | 2013-05-08 | 宁波市江北兴达焊割减压仪表厂 | Sliding type temper resistant cutting torch |
| CN103437916A (en) * | 2013-08-30 | 2013-12-11 | 东风商用车有限公司 | Anti-tempering safety valve of engine |
| CN103437916B (en) * | 2013-08-30 | 2015-10-14 | 东风商用车有限公司 | A kind of motor backfireproof safety valve |
| CN107781491A (en) * | 2017-12-07 | 2018-03-09 | 湖北中瑞天恒节能科技发展有限公司 | Gas valve and anti-backfire kitchen range |
| CN107781491B (en) * | 2017-12-07 | 2019-05-31 | 湖北中瑞天恒节能科技发展有限公司 | Gas valve and anti-backfire kitchen range |
| CN111336341A (en) * | 2020-03-20 | 2020-06-26 | 海洋石油工程（青岛）有限公司 | Automatic management equipment for gas zone state |
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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: 20110126 Termination date: 20110511 |