CN204201200U - Safety pressure-limiting valve - Google Patents
Safety pressure-limiting valve Download PDFInfo
- Publication number
- CN204201200U CN204201200U CN201420591898.XU CN201420591898U CN204201200U CN 204201200 U CN204201200 U CN 204201200U CN 201420591898 U CN201420591898 U CN 201420591898U CN 204201200 U CN204201200 U CN 204201200U
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- China
- Prior art keywords
- valve
- valve chamber
- plug
- vent
- spool
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of safety pressure-limiting valve, belong to valve technology field, solve reduction valve and operationally run into when the unexpected play of air pressure rises and can not reduce pressure and cause the problem of job insecurity by Quick air-discharge.Structure is: comprise the spool in valve body, valve chamber, elastic spring and valve body one headgear have the plug blocking valve chamber; Valve body is provided with ring-shaped step near the position of plug, and the wall of ring-shaped step has vent vertically, and vent is interspersed with limiting stopper in the position of plug; Described valve core upper sleeve is equipped with the first seal ring and valve chamber's inner wall sealing, and spool is provided with boss near suction port place of valve chamber, boss is equipped with the second seal ring and puts in valve chamber's suction port and seal with it.The effective discharge portion of vent of the present utility model increases along with the increase of the air pressure of valve chamber's suction port, can reduce pressure by Quick air-discharge, protect spring and plug, realize safety relief when running into high pressure like this.
Description
Technical field
The utility model belongs to valve technology field, is specially safety pressure-limiting valve.
Background technique
Existing pressure-limit valve is substantially all that piston type blocks up valve, and one end of spool connects gasket seal sealing, and the other end connects elastic spring, and spring one end conflict plug, valve body is provided with air outlet hole in spring side.During routine work, by the air pressure that the elastic force of spring makes spool press seal pad come in seal chamber, when the air pressure in cavity exceedes operating air pressure, the meeting of the air pressure in cavity promotes spool squeeze pressure spring, pressure spring shrinks and is exhausted decompression, some in particular cases this pressure-limit valve easily to damage or unstable, as, air pressure in working cavity is acute suddenly to be risen, a fixing air outlet hole can not realize the work of the exhaust decompression of moment, spool can apply the pressure of overload to spring, pressure exceedes the fatigue limit of elastic spring, elastic spring is caused not have enough elastic force to seal, plug also can be caused also to get loose, affect work.
Summary of the invention
A kind of pressure-limit valve of work safety is provided for above-mentioned technical problem, can realizes operationally running into air pressure acute when rising suddenly, can reduce pressure and realize stable operation by Quick air-discharge.
For solving the problems of the technologies described above, the technological scheme of the utility model safety pressure-limiting valve is: comprise the spool in valve body, valve chamber, elastic spring and valve body one headgear have the plug blocking valve chamber; Valve body is provided with ring-shaped step near the position of plug, and the wall of ring-shaped step has vent vertically, and vent is interspersed with limiting stopper in the position of plug; Described valve core upper sleeve is equipped with the first seal ring and valve chamber's inner wall sealing, and spool is provided with boss near suction port place of valve chamber, boss is equipped with the second seal ring and puts in valve chamber's suction port and seal it.
Concrete has, and the head of described limiting stopper is T-shaped, and be stuck on ring-shaped step, pin is L-type, puts in valve chamber and hooks within it on wall
The beneficial effects of the utility model: pressure relief vent of the present utility model is the vent on the ring-shaped step wall of valve body, vent is offered along the axis of wall, the air pressure of valve chamber's suction port raises, spool can move by extrusion spring, spool moves to the position of vent, part vent starts exhaust decompression, when the air pressure of valve chamber's suction port is very high, the inadequate exhaust decompression of a part of vent, at this moment spool continues extrusion spring, vent entirety is made to be exhausted decompression, at this moment limiting stopper meeting bumping post spool, spool is not allowed to continue extrusion spring, with the fatigue limit preventing pressure from exceeding spring, protection plug can not get loose, realize comparatively stable work.
Valve core upper sleeve is equipped with the first seal ring, the boss of spool is equipped with the second seal ring, such double-layer seal, makes the air pressure in valve chamber's suction port more stable.
Accompanying drawing explanation
Fig. 1 is explosive view of the present utility model;
Fig. 2 is sectional view of the present utility model.
Embodiment
By reference to the accompanying drawings the utility model is further elaborated.
As depicted in figs. 1 and 2, a kind of safety pressure-limiting valve, comprising the spool 3 in valve body 1, valve chamber 2, elastic spring 4 and valve body 1 one headgear has the plug 5 blocking valve chamber 2; Valve body 1 is provided with ring-shaped step 6 near the position of plug 5, and the wall of ring-shaped step 6 has vent 7 vertically, and vent 7 is interspersed with limiting stopper 8 in the position of plug 5; Described spool 3 is equipped with the first seal ring 9 and valve chamber 2 inner wall sealing, spool 3 is provided with boss 11 near valve chamber's suction port 10 place, boss 11 is equipped with the second seal ring 12 and puts in valve chamber's suction port 10 and seal it.
Pressure relief vent of the present utility model is the vent 7 on the wall of the ring-shaped step 6 of valve body 1, vent 7 is offered along the axis of wall, the air pressure of valve chamber's suction port 10 raises, spool 3 can move by extrusion spring 4, spool 3 moves to the position of vent 7, part vent 7 starts exhaust decompression, when the air pressure of valve chamber's suction port 10 is very high, the inadequate exhaust decompression of a part of vent 7, at this moment spool 3 continues extrusion spring 4, make vent 7 entirety be exhausted decompression, can exhaust decompression be accelerated like this.
Spool 3 is equipped with the first seal ring 9, the boss 11 of spool 3 is equipped with the second seal ring 12, such double-layer seal, make the air pressure in valve chamber's suction port 10 more stable.
The head of the limiting stopper 8 in this example is T-shaped, and be stuck on ring-shaped step 6, pin is L-type, put in valve chamber 2 and hook within it on wall, and such limiting stopper 8 very interspersedly can be stuck in ring-shaped step 6 with on valve chamber 2 inwall in vent 7.Can be blocked when spool 3 moves and encounters limiting stopper 8, not allow spool 3 continue extrusion spring 4, prevent pressure from exceeding the fatigue limit of spring 4, also protect plug 5 to get loose, realize safety relief.
Claims (2)
1. a safety pressure-limiting valve, comprising the spool (3) in valve body (1), valve chamber (2), elastic spring (4) and valve body (1) headgear has the plug (5) blocking valve chamber (2); It is characterized in that: valve body (1) is provided with ring-shaped step (6) near the position of plug (5), and the wall of ring-shaped step (6) has vent (7) vertically, vent (7) is interspersed with limiting stopper (8) in the position of plug (5); Described spool (3) is equipped with the first seal ring (9) and valve chamber (2) inner wall sealing, spool (3) is provided with boss (11) near suction port (10) place of valve chamber, boss (11) is equipped with the second seal ring (12) and puts in valve chamber's suction port (10) and seal it.
2. safety pressure-limiting valve according to claim 1, is characterized in that: the head of described limiting stopper (8) is T-shaped, and be stuck on ring-shaped step (6), pin is L-type, puts in valve chamber (2) and hooks within it on wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591898.XU CN204201200U (en) | 2014-10-14 | 2014-10-14 | Safety pressure-limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591898.XU CN204201200U (en) | 2014-10-14 | 2014-10-14 | Safety pressure-limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204201200U true CN204201200U (en) | 2015-03-11 |
Family
ID=52659162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420591898.XU Expired - Fee Related CN204201200U (en) | 2014-10-14 | 2014-10-14 | Safety pressure-limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204201200U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805374A (en) * | 2016-03-31 | 2016-07-27 | 贺逢宝 | Balance-pressure control valve |
| CN106179157A (en) * | 2016-08-12 | 2016-12-07 | 胡海潮 | Quiet pressure release reactor |
| CN113577487A (en) * | 2021-06-20 | 2021-11-02 | 三河科达实业有限公司 | Special breathing mask of portable general life support system suitable for severe cold environment |
| CN117345888A (en) * | 2023-12-04 | 2024-01-05 | 福建云联中汇环保科技有限公司 | Sewage air valve capable of preventing leakage of sewage |
-
2014
- 2014-10-14 CN CN201420591898.XU patent/CN204201200U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805374A (en) * | 2016-03-31 | 2016-07-27 | 贺逢宝 | Balance-pressure control valve |
| CN106179157A (en) * | 2016-08-12 | 2016-12-07 | 胡海潮 | Quiet pressure release reactor |
| CN106179157B (en) * | 2016-08-12 | 2018-04-27 | 肇庆市正大化工机械设备有限公司 | Mute pressure release reaction kettle |
| CN113577487A (en) * | 2021-06-20 | 2021-11-02 | 三河科达实业有限公司 | Special breathing mask of portable general life support system suitable for severe cold environment |
| CN117345888A (en) * | 2023-12-04 | 2024-01-05 | 福建云联中汇环保科技有限公司 | Sewage air valve capable of preventing leakage of sewage |
| CN117345888B (en) * | 2023-12-04 | 2024-04-12 | 福建云联中汇环保科技有限公司 | Sewage air valve capable of preventing leakage of sewage |
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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 |
Granted publication date: 20150311 Termination date: 20151014 |
|
| EXPY | Termination of patent right or utility model |