CN100370170C - Gas safety valve - Google Patents
Gas safety valve Download PDFInfo
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- CN100370170C CN100370170C CNB031292445A CN03129244A CN100370170C CN 100370170 C CN100370170 C CN 100370170C CN B031292445 A CNB031292445 A CN B031292445A CN 03129244 A CN03129244 A CN 03129244A CN 100370170 C CN100370170 C CN 100370170C
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- valve body
- spool
- push rod
- valve
- gas relief
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Abstract
The present invention relates to a coal gas safety valve, particularly to a safety valve used on a coal gas pipeline. The present invention belongs to the technical field of valves. The present invention solves the problems of complicated structure, low sensitivity, etc. existing in the existing safety valve. The coal gas safety valve comprises a valve body, and a gas inlet joint and a gas outlet joint which are arranged at both ends of the valve body, wherein a valve core is arranged in the valve body. The front part of the valve core faces towards the gas outlet joint, and the front end of the valve core is provided with a sealing surface. After the sealing surface is in contact with the inner side surface of the valve body, the coal gas safety valve can be closed. The middle of the valve core is provided with a conical surface. A push rod which penetrates through the valve body is arranged in the valve body, and the outer end of the push rod extends out of the valve body. The inner end of the push rod is positioned in the valve body, and the push rod is pressed on the conical surface in the middle of the valve core. A sealing ring is arranged between the push rod and the valve body. When used, the coal gas safety valve is connected in series to the coal gas pipeline. The safety valve adopts the pure mechanical principle, has the advantages of simple and reasonable structure, high sensitivity and low product cost, and has high use value.
Description
Technical field
The invention belongs to valve technology field, the safety valve that uses on particularly a kind of gas pipe line.
Background technique
In gaspipe line, safety is most important.Close cooking stove or gas pipe line reason such as break owing to forgetting, can cause coal gas to leak in a large number.At present, the whole world is continuous because of the accident that gas leakage caused, and has constituted great threat to daily life.
For the leakage accident that prevents gas pipe line takes place, an alarm is installed normally.When taking place, gas leakage sends chimes of doom.Though it is alarm has certain effect, when unmanned at the scene or coal gas leaks in a large number, powerless.
For this reason, " the gas alarm safety valve " that Chinese patent 962293202 provides, it is made up of valve body and alarm two-part.Electromagnet is set, the switching of control valve in valve body.Therefore, when alarm sends warning, also export electrical signal, make valve closing, to cut off source of the gas.
In addition, in " gas pipeline autocontrolled safety valve " that Chinese patent 992234530 provides, similar structure is arranged also.It also is the switching of controlling safety valve by electromagnetic coil and electromagnet.
The structure of the gas relief valve of the above-mentioned principle of foundation is a more complicated.It also needs an alarm and its supporting use except needing electromagnet or solenoid valve.Therefore, the structure of its product is complicated, installs and use also inconvenience.Simultaneously, solenoid valve or electromagnet are easy to generate spark, the generation that might cause an explosion accident when action.
Omitting alarm, utilize pure Der Grundsatz der Maschinen to realize closing automatically of safety valve, is a kind of practical method.To this, many people have done research, and some has also applied for patent.As " multifunctional safe gas valve " that Chinese patent 882203592 provides, it is that the connection switch of being made up of overcoat, joint, depression bar, spring, seal ring, steel ball etc. is housed on gas-entered passageway, and mechanical timer etc. is housed on housing.This valve is that the principle of utilizing pressure official post steel ball and seal ring to fit tightly has realized the safety protection to various faults.But this safety valve exists many deficiencys, and mainly being that structure is complicated causes the cost of product too high, is difficult to be widely used.Simultaneously, the sensitivity of this safety valve is lower, can not make reaction fast for some slight leakage phenomenons, makes security of products can be subjected to certain influence.Simultaneously, the safety valve of other close principle also exists similar problem.
Summary of the invention
The objective of the invention is provides a kind of gas relief valve of novel structure at the present existing the problems referred to above of gas relief valve, makes it have characteristics such as simple and reasonable, highly sensitive, that product cost is low.
The objective of the invention is to realize by following technical proposal: this gas relief valve comprises the air input joint and the air outlet adapter at valve body and valve body two ends, be provided with a spool in the valve body, the front portion of spool is toward air outlet adapter, the front end of spool has a sealing surface, this sealing surface with this gas relief valve is closed after the valve body inner side surface contacts, the middle part of spool is one and is conical conical surface, also be provided with a push rod that passes valve body in the valve body, valve body is stretched out in the outer end of push rod, the inner of push rod is positioned at valve body and roof pressure on the conical surface at spool middle part, between push rod and the valve body seal ring is set.
In above-mentioned gas relief valve, be provided with a spring between described spool front end and the valve body inboard.Be not subjected to other external force to do the time spent, the sealing surface of spool its front end under the effect of this spring separates with the valve body inner side surface, makes the safety valve be on state.
In use, this gas relief valve is serially connected with on the gaspipe line.After coal gas is entered by air input joint,, discharge by the air outlet adapter place again by this gas relief valve.Under the coal gas normal operating condition, push push rod downwards, the front end roof pressure that makes push rod moves after making spool on the conical surface at spool middle part; Simultaneously, spool makes the sealing surface of spool front end and separating of valve body inner side surface again under the effect of spring.Therefore, coal gas just can pass through spool, and this gas relief valve is on state.
But, abnormal conditions are appearring, and when leakage phenomenon occurring as pipeline, the air pressure in the pipeline can rise significantly.At this moment, the air pressure of coal gas will be oppressed spool, and the resistance that makes spool overcome push rod and spring moves forward, until the sealing surface roof pressure of spool front end on the inner side surface of valve body.Like this, the safety valve cuts out, also just stoped coal gas to continue discharging forward, to guarantee the safety of pipeline by spool.In the case, push rod is the position that is in rising.
Get rid of at circuit failure, when recovering normal state, as long as push push rod downwards, spool retreated, the safety valve is on state again.
In above-mentioned gas relief valve, the sealing surface of described spool front end is conical, at the inner side surface of valve body the shape that matches is therewith arranged also.This shape helps the sealing between spool and the valve body inner side surface.
Preferably on the sealing surface of spool front end, open an annular groove, adorn a seal ring in the annular groove.By this seal ring, can make the sealability between spool and the valve body inner side surface better.
In above-mentioned gas relief valve, the rear portion of described spool is a guide way, and the undersized of guide way is in the aperture of valve body inner bore.Guide way plays leading role, makes spool skewness occur moving forward and backward Shi Buhui.
Usually, guide way is cylindrical, and its external diameter is slightly less than the aperture of valve body inner bore, and has vent on the sidewall of guide way.The vent of spool sidewall is to be used for making the coal gas can be by the guide way of spool.
In above-mentioned gas relief valve, described push rod outer end can be provided with a block, and block is fixed together with push rod.The effect of block is to cover push rod, makes the beautiful shape of product.Simultaneously, when operation,, use more convenient as long as with having pulled or pushed block.
Compared with prior art, the advantage of this gas relief valve is:
1, because the safety valve has adopted the principle of pure machinery, omits alarm and calutron, spool and push rod mainly have been set in valve body, simplified the structure of product, reduced the cost of product;
2, in the safety valve, utilize moving forward and backward of spool, make the valve conducting or close, it is simple and reasonable, good stability, highly sensitive;
3, the sealing surface of spool front end is conical, makes the safety valve have excellent sealing performance;
4, in use, only need push a lower push-rod and get final product, easy to operate;
When 5, installing, the safety valve if just directly be serially connected with on the gaspipe line can, applied range has higher utility.
Description of drawings
Fig. 1 is the structural representation of gas relief valve provided by the invention.
Fig. 2 is the outline drawing of spool in the gas relief valve provided by the invention.
Fig. 3 is the sectional view of spool in the gas relief valve provided by the invention.
Among the figure, 1, valve body; 2, spool; 21, sealing surface; 22, annular groove; 23, seal ring; 24, conical surface; 25, guide way; 26, vent; 3, air input joint; 31, convex shoulder; 4, air outlet adapter 5, push rod 6, block 7, nut 8, spring; 9, seal ring; 10, nut.
Embodiment
As shown in Figure 1, this gas relief valve comprises parts such as valve body 1, spool 2, push rod 5, air input joint 3 and air outlet adapter 4.Air input joint 3 and air outlet adapter 4 lay respectively at the two ends of valve body 1.Air input joint 3 is connected on the gaspipe line usually.In the present embodiment, air input joint 3 connects with valve body 1 by screw thread, and is provided with the rubber seal 9 that seals between air input joint 3 and valve body 1.A convex shoulder 31 is arranged on the air input joint 3, and nut 7 is socketed on the air input joint 3 and convex shoulder 31 is positioned at nut 7.Therefore, nut 7 can be on air input joint 3 among a small circle activity, but be subjected to the restriction of convex shoulder 31, make it can not break away from air input joint 3.This nut 7 connects with the joint of gaspipe line by screw thread, and the safety valve is connected on the gaspipe line.
As shown in Figure 1, be provided with a spool 2 in valve body 1, the front end of spool 2 is toward air outlet adapter 4.As shown in Figures 2 and 3, the front end of spool 2 is conical sealing surfaces 21, the shape that has sealing surface 21 therewith to match at the inner side surface of valve body 1.When spool 2 moves forward, make sealing surface 21 roof pressures when the inner side surface of valve body 1, the safety valve just is in closed condition.
In the present embodiment, on the sealing surface 21 of spool 2 front ends, have an annular groove 22, zero shape rubber seal 23 is housed in the annular groove 22, can make between spool 2 and valve body 1 inner side surface to have better sealability.
Between the front end of spool 2 and valve body 1 inboard, a spring 8 is set.On spool 2, spool 2 is separated by spring 8 roof pressures between the inner side surface of the sealing surface 21 of situation lower valve core 2 front ends that are not subjected to the external force effect and valve body 1, also just make safety valve keep on state.
As shown in Figures 2 and 3, there is a conical surface 24 at the middle part of spool 2.As shown in Figure 1, there is a push rod 5 that passes valve body 1 at the middle part of valve body 1, and the inner roof pressure of push rod 5 is on the conical surface 24 at spool 2 middle parts.Push rod 5 can move up and down on valve body 1 within the specific limits, but can not break away from valve body 1.This can stop that the mode of push rod 5 realizes by a rivet or pin etc. are set on the valve body 1 at push rod 5 places.
Between push rod 5 and valve body 1, be provided with zero shape rubber seal 9, to guarantee the sealing at push rod 5 places.In the present embodiment, be provided with two seal rings 9 herein, play the double seal effect.
When pushing push rod 5, when push rod 5 was moved down, the inner of push rod 5 on the conical surface 24 at spool 2 middle parts, and retreated spool 2 with regard to roof pressure, and the sealing surface 21 that also just makes spool 2 front ends is in separated state with the inner side surface of valve body 1.
Obviously, if when occurring anomaly such as leakages in the pipeline and causing air pressure in the pipeline to improve, the air pressure of coal gas will be oppressed spool 2, and spool 2 is moved forward, and promptly overcomes the resistance of push rod 5 and spring 8, and safety valve cuts out.Like this, can cut off coal gas, guarantee the safety of pipeline.
Close in the closed procedure at the safety valve, push rod 5 can the certain position of rising.When needs Open valve again, as long as push a lower push-rod 5 downwards.
As shown in Figure 1, a block 6 is arranged in the outer end of push rod 5.Block 6 is fixed together with push rod 5, so that to the operation of push rod 5, make the beautiful shape of product again.It is that material is made that block 6 can adopt plastics.
As shown in Figures 2 and 3, the guide way 25 at spool 2 rear portions is cylindrical, and has vent 26 on its sidewall.This structure makes that spool 2 can deflection when moving forward and backward.In the present embodiment, vent 26 has four.Coal gas is by vent 26 guide way 25 by spool 2.
Claims (10)
1. gas relief valve, the air input joint (3) and the air outlet adapter (4) that comprise valve body (1) and valve body (1) two ends, be provided with a spool (2) in the valve body (1), the front portion that it is characterized in that described spool (2) is toward air outlet adapter (4), the front end of spool (2) has a sealing surface (21), this sealing surface (21) with this gas relief valve is closed after valve body (1) inner side surface contacts, the middle part of spool (2) is one and is conical conical surface (24), also be provided with a push rod (5) that passes valve body (1) in the valve body (1), valve body (1) is stretched out in the outer end of push rod (5), the inner of push rod (5) is positioned at valve body (1) and roof pressure on the conical surface (24) at spool (2) middle part, between push rod (5) and the valve body (1) seal ring (9) is set.
2. gas relief valve according to claim 1 is characterized in that being provided with a spring (8) between described spool (2) front end and valve body (1) inboard.
3. gas relief valve according to claim 1 and 2 is characterized in that the sealing surface (21) of described spool (2) front end is conical, at the inner side surface of valve body (1) shape that matches is therewith arranged also.
4. gas relief valve according to claim 3 is characterized in that opening an annular groove (22) on the sealing surface (21) of spool (2) front end, adorns a seal ring (23) in the annular groove (22).
5. gas relief valve according to claim 1 and 2, the rear portion that it is characterized in that described spool (2) are guide waies (25), and the undersized of guide way (25) is in the aperture of valve body (1) endoporus.
6. gas relief valve according to claim 5 is characterized in that described guide way (25) is cylindrical, and its external diameter is slightly less than the aperture of valve body (1) endoporus, and has vent (26) on the sidewall of guide way (25).
7. gas relief valve according to claim 1 and 2 is characterized in that described push rod (5) outer end can be provided with a block (6), and block (6) is fixed together with push rod (5).
8. gas relief valve according to claim 1 and 2 is characterized in that described air input joint (3) connects with valve body (1) by screw thread, and be provided with the rubber seal (9) that seals between air input joint (3) and valve body (1).
9. gas relief valve according to claim 8 is characterized in that a convex shoulder (31) is arranged on the described air input joint (3), and a nut (7) is socketed on the air input joint (3) and convex shoulder (31) is positioned at nut (7).
10. gas relief valve according to claim 1 and 2 is characterized in that between described air outlet adapter (4) and the valve body (1) it being joining by a nut (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031292445A CN100370170C (en) | 2003-06-08 | 2003-06-08 | Gas safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031292445A CN100370170C (en) | 2003-06-08 | 2003-06-08 | Gas safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1460805A CN1460805A (en) | 2003-12-10 |
| CN100370170C true CN100370170C (en) | 2008-02-20 |
Family
ID=29591188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031292445A Expired - Lifetime CN100370170C (en) | 2003-06-08 | 2003-06-08 | Gas safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100370170C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109602963A (en) * | 2018-12-29 | 2019-04-12 | 捷锐企业(上海)有限公司 | Oxygen uptake and vacuum suction integration module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355617A (en) * | 2017-07-29 | 2017-11-17 | 严修华 | A kind of dual-purpose cassette valve union |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054858U (en) * | 1989-09-29 | 1990-03-21 | 房林 | Safety pressure valve |
| CN2075291U (en) * | 1990-03-05 | 1991-04-17 | 唐德尧 | Safety pressure reducing valve for gas leakage alarm |
| CN2254139Y (en) * | 1996-03-29 | 1997-05-14 | 马景明 | Leak auto-closing safety valve for liquefied gas cylinder |
| CN2313123Y (en) * | 1997-08-29 | 1999-04-07 | 江国金 | Gas-leakage-proof safety valve |
| CN2627312Y (en) * | 2003-06-08 | 2004-07-21 | 玉环县巨龙工贸有限公司 | Gas relief valve |
-
2003
- 2003-06-08 CN CNB031292445A patent/CN100370170C/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054858U (en) * | 1989-09-29 | 1990-03-21 | 房林 | Safety pressure valve |
| CN2075291U (en) * | 1990-03-05 | 1991-04-17 | 唐德尧 | Safety pressure reducing valve for gas leakage alarm |
| CN2254139Y (en) * | 1996-03-29 | 1997-05-14 | 马景明 | Leak auto-closing safety valve for liquefied gas cylinder |
| CN2313123Y (en) * | 1997-08-29 | 1999-04-07 | 江国金 | Gas-leakage-proof safety valve |
| CN2627312Y (en) * | 2003-06-08 | 2004-07-21 | 玉环县巨龙工贸有限公司 | Gas relief valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109602963A (en) * | 2018-12-29 | 2019-04-12 | 捷锐企业(上海)有限公司 | Oxygen uptake and vacuum suction integration module |
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| Publication number | Publication date |
|---|---|
| CN1460805A (en) | 2003-12-10 |
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| 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 | ||
| CP03 | Change of name, title or address |
Address after: 317609 Yuhuan City, Zhejiang province Longxi Industrial Zone Patentee after: Zhejiang giant dragon fluid intellectual control Limited by Share Ltd. Address before: 317609 Longxi Industrial Zone, Zhejiang, Yuhuan County Patentee before: ZHEJIANG JULONG INDUSTRIAL & TRADE CO.,LTD. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080220 |
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| CX01 | Expiry of patent term |