CN2092007U - Safety valve - Google Patents
Safety valve Download PDFInfo
- Publication number
- CN2092007U CN2092007U CN 91200852 CN91200852U CN2092007U CN 2092007 U CN2092007 U CN 2092007U CN 91200852 CN91200852 CN 91200852 CN 91200852 U CN91200852 U CN 91200852U CN 2092007 U CN2092007 U CN 2092007U
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- China
- Prior art keywords
- valve
- safety valve
- utility
- model
- lower body
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Abstract
The utility model provides a safety valve, which makes an improvement on the basis of the existing A27 type safety valve. The utility model is characterized in that a valve body is divided into an upper body and a lower body; a guide spacing sleeve is arranged between the upper body and the lower body and plays a role of guiding and opening-height spacing for a valve clack; a valve seat is additionally provided with a regulating ring, making cracking pressure, reseating pressure, etc. be able to meet requirements at the same time. The utility model has the advantages of reasonable structure, stable performance and long service life, and each performance index can reach the requirements of GB12243-89 <<spring directly loaded safety valve>> for national standard. The utility model is suitable to be used as an over-pressure protection device in steam or similar non-corrosive medium equipment and pipeline whose working temperature is lower than or equal to 225 DEG C.
Description
The utility model relates to a kind of safety valve, particularly a kind of improved A27 type safety valve.
Safety valve is mounted on pressurized equipment, container or the pipeline as overpressure protector.When system's internal pressure surpassed permitted value, valve was opened automatically, and full dose discharging then descends pressure, in case the locking system internal pressure continues to raise; When pressure was reduced to specified value, valve should in time be closed, and guaranteed sealing.The structural type of safety valve mainly contains heavy hammer type, spring and leading type.Direct spring loaded safety valve is little, light, highly sensitive because of having volume, and the mounting point is not subjected to strict restriction and is widely used.A27 type safety valve belongs to the Direct spring loaded safety valve that the strap wrenches outside thread connects, and can be suitable for the safety valve of little latus rectum.Existing A27 type safety valve structure comprises valve body, valve seat, flap, valve rod, spring, spring seat, adjustment sleeve, locking nut, loam cake, hand hoisting mechanism etc.The flap bottom has three guiding pin to put in the valve seat endoporus, and promptly flap is led by valve seat, or claims guiding down, and this can cause circulation area to reduce, and has influence on Coefficient of discharge, and promptly the Coefficient of discharge difficulty reaches requirement, and Lift is difficult to realize control; Because the actual rigidity of spring is difficult to reach the requirement of not only satisfying cracking pressure but also satisfying Reseating pressure of a safety valve, so the performance index difficulty of this kind safety valve reaches GB12243-89 " spring Direct loaded safety valve " request of national standard.
The purpose of this utility model is that existing A27 type safety valve is improved, make cracking pressure, Reseating pressure of a safety valve, Lift, etc. performance index all can satisfy the requirement of GB12243-89 GB, and improve Coefficient of discharge.
Technical solution of the present utility model is: valve body is divided into upper body (8) and lower body (1), and the two links together, and can be threaded, and also can connect by screw; Between upper body (8) and lower body (1), be equipped with guide and limit cover (6), the endoporus of guide and limit cover (6) matches with flap (5), rise simultaneously the guiding of flap (5) and the control of Lift, guide and limit cover (6) also can be made as one with lower body (1), and can be equipped with sleeve (7) with flap (5) place of matching at guide and limit cover (6) endoporus, in order to the material requirement that reduces lower body (1); Valve seat (2) upper end screw thread is connected with Adjusting ring (4), the Cock screw (3) that is threaded on the lower body (1) and can stops Adjusting ring (4) to rotate.Unclamp Cock screw (3), Adjusting ring (4) is rotatable, to change Adjusting ring (4) to the distance between valve seat (2) sealing surface, tightens Cock screw (3), and Adjusting ring (4) just can not rotate.
Accompanying drawing is an embodiment of the present utility model.Have among the figure: valve rod (9), spring (10), spring seat (11), hand hoisting mechanism (12), lock screw (13), locking nut (14), adjustment sleeve (15), loam cake (16).
Guidance mode in the utility model flap (5) employing, thus circulation area increased, improved Coefficient of discharge.Owing to guide and limit cover (6) has been arranged, has made the maximum open amount of flap (5) controlled, thereby make Lift reach the regulation requirement, and prolonged the working life of spring (10).Owing to increased Adjusting ring structures such as (4), overcome the shape of spring rate and flap lower guide stream interface and machining accuracy to the influence that valve opening pressure, Reseating pressure of a safety valve and mechanical property etc. cause, make the valve These parameters reach the regulation requirement.
Rational in infrastructure, the stable performance of the utility model, long service life, every performance index all reach the CB12243-89 request of national standard.Be suitable for the steam of operating temperature≤225 ℃ and similarly on the equipment of non-aggressive medium and the pipeline as overpressure protector.
Claims (3)
1, a kind of safety valve, structure includes valve body, valve seat (2), flap (5), valve rod (9), spring (10), spring seat (11), adjustment sleeve (15), locking nut (14), loam cake (16) and hand hoisting mechanism (12), it is characterized in that valve body is divided into upper body (8) and lower body (1), the two links together; Be equipped with guide and limit cover (6) between upper body (8) and lower body (1), the endoporus of guide and limit cover (6) matches with flap (5); Valve seat (2) upper end screw thread is connected with Adjusting ring (4), the Cock screw (3) that is threaded on the lower body (1) and can stops Adjusting ring (4) to rotate.
2, safety valve according to claim 1 is characterized in that described guide and limit cover (6) and lower body (1) are made as one.
3,, it is characterized in that the endoporus of described guide and limit cover (6) is equipped with sleeve (7) with flap (5) place of matching according to claim 1,2 described safety valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91200852 CN2092007U (en) | 1991-01-13 | 1991-01-13 | Safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91200852 CN2092007U (en) | 1991-01-13 | 1991-01-13 | Safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2092007U true CN2092007U (en) | 1992-01-01 |
Family
ID=4911711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91200852 Withdrawn CN2092007U (en) | 1991-01-13 | 1991-01-13 | Safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2092007U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277546A (en) * | 2013-06-09 | 2013-09-04 | 张家港沙洲船用阀门制造有限公司 | Boiler safety valve for ship |
| CN103938483A (en) * | 2014-05-09 | 2014-07-23 | 浙江汉普新材料技术有限公司 | Paper humidifying device on paper making machine |
| CN103968112A (en) * | 2014-04-10 | 2014-08-06 | 河南航天液压气动技术有限公司 | Safety valve |
| CN106402442A (en) * | 2016-12-06 | 2017-02-15 | 无锡优耐特净化装备有限公司 | Low-lift spring-loaded safety valve |
-
1991
- 1991-01-13 CN CN 91200852 patent/CN2092007U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277546A (en) * | 2013-06-09 | 2013-09-04 | 张家港沙洲船用阀门制造有限公司 | Boiler safety valve for ship |
| CN103968112A (en) * | 2014-04-10 | 2014-08-06 | 河南航天液压气动技术有限公司 | Safety valve |
| CN103938483A (en) * | 2014-05-09 | 2014-07-23 | 浙江汉普新材料技术有限公司 | Paper humidifying device on paper making machine |
| CN103938483B (en) * | 2014-05-09 | 2016-06-29 | 浙江汉普新材料技术有限公司 | A kind of paper humidifying equipment on paper machine |
| CN106402442A (en) * | 2016-12-06 | 2017-02-15 | 无锡优耐特净化装备有限公司 | Low-lift spring-loaded safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |