CN203823167U - Safety valve - Google Patents
Safety valve Download PDFInfo
- Publication number
- CN203823167U CN203823167U CN201420171735.6U CN201420171735U CN203823167U CN 203823167 U CN203823167 U CN 203823167U CN 201420171735 U CN201420171735 U CN 201420171735U CN 203823167 U CN203823167 U CN 203823167U
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- China
- Prior art keywords
- valve
- power
- assisted
- chamber
- plug
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- Expired - Lifetime
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- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000033001 locomotion Effects 0.000 claims description 9
- 238000005336 cracking Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Safety Valves (AREA)
Abstract
The utility model relates to a safety valve which comprises a valve body with a valve cavity, wherein the valve cavity comprises a valve cavity and a power assisting cavity which are communicated with each other; a medium inlet communicated with the valve cavity is formed in the front end of the valve body; a valve, of which the front end can block the medium inlet under the action of a spring, is arranged in the valve cavity; medium passages, through which a medium is guided to the rear side of the valve from the front side of the valve when the medium inlet is open, are formed in the valve and the valve body or between the valve and the valve body; a power assisting plug is movably assembled in the power assisting cavity in a guiding manner, and in transmission connection with the valve through a pulling force member. The safety valve provided by the utility model is higher in valve opening speed.
Description
Technical field
The utility model relates to the safety valve in valve field.
Background technique
Safety valve is used on pressurized equipment, container or pipeline, and as overpressure protector, in the time that the pressure in equipment, container or pipeline is elevated to permitted value, valve is opened automatically, to prevent that the pressure in equipment, container or pipeline from continuing to raise.Existing a kind of safety valve as disclosed in Chinese patent CN2508070Y " pressure gas safety valve ", this safety valve comprises the valve body with valve pocket, on valve body, be provided with suction port and relief opening, suction port is positioned at the front end of valve body, in valve pocket, be provided with the valve for shutoff suction port that can move forward and backward, the rear end of valve body is provided with valve seat, and between valve seat and valve, top is provided with spring.Under normal circumstances, valve is subject to acting force of the spring always by suction port shutoff, in the time that the gas pressure in relevant device, container or pipeline is excessive, gas can promote valve and overcome the active force of spring and valve is moved backwards, air inlet open like this, gas is passed through by the gap between valve and valve body, then discharges through relief opening.The problem that existing this safety valve exists is: at some special dimension, the rate request that safety valve is reached to full dose discharge is very high, that is to say that the rate request to moving after valve is higher, and the speed of moving after the valve of existing safety valve depends on suffered gas pressure and the acting force of the spring in valve both sides, front and back completely, this makes to open after certain aperture when valve, it is rapid not that opening speed seems, thereby affect effective operation of whole system.
Model utility content
The purpose of this utility model is to provide a kind of safety valve that can improve valve opening speed.
In order to address the above problem, the technical solution of the utility model is:
A kind of safety valve, comprise the valve body with valve pocket, valve pocket comprises the valve chamber and the power-assisted chamber that are interconnected, the front end of valve body is provided with the medium inlet hole being communicated with described valve chamber, in valve chamber, be provided with and be subject to acting force of the spring and the valve of medium inlet hole described in front end shutoff, on valve, on valve body or between valve and valve body, be provided with in the time that described medium inlet hole is opened the medium channel by valve front side guiding valve rear side by medium, in described power-assisted chamber, guiding movement is equipped with power-assisted plug, and power-assisted plug is in transmission connection by tension member and described valve.
The face area of described power-assisted plug is greater than the face area of described valve.
Between valve body and power-assisted plug, be provided with media outlet, described power-assisted chamber, valve chamber are coaxially set, described tension member is the pull bar that front end is fixedly connected with described valve, rear end is fixedly connected with described power-assisted plug, described in described valve shutoff when medium inlet hole described in power-assisted plug be positioned at the accent place, rear end in described power-assisted chamber.
Described power-assisted plug coordinates with the chamber wall sealed sliding action-oriented in described power-assisted chamber.
Rear side in described valve in described valve pocket is equipped with spring seat along fore-and-aft direction guiding movement, described spring is that the stage clip between described spring seat and valve is located on top, rear side in described spring seat in described valve pocket is provided with adjustment seat, in described adjustment seat, be installed with adjustment sleeve that can move forward and backward, front end and the top press fit of described spring seat rear end, described tension member is arranged in along fore-and-aft direction guiding movement in the endoporus of described spring seat and described adjustment sleeve, is provided with the axial hole passing through along fore-and-aft direction for described medium on described adjustment seat and spring seat.
On the outer circumferential face of described adjustment sleeve, be installed with locking nut.
Described valve pocket is the stepped cavity that axis extends along fore-and-aft direction, the macropore section of stepped cavity forms described power-assisted chamber, the aperture section of stepped cavity forms described valve chamber, described adjustment seat is arranged in described power-assisted chamber, adjustment seat is positioned at described power-assisted plug front side, and described spring seat is arranged in described valve chamber.
Described tension member is the pull bar that front end is fixedly connected with described valve, rear end is fixedly connected with described power-assisted plug.
Turning up to have to connect and turn edge in the rear end of described valve body, on connection turns edge, is provided with the screw perforation that axis extends along fore-and-aft direction.
Described medium inlet hole is the shoulder hole that axis extends along fore-and-aft direction, and the macropore section of shoulder hole is positioned at the rear side of the aperture section of shoulder hole.
The beneficial effects of the utility model are: in the time of normal use, valve is subject to acting force of the spring and by the shutoff of medium inlet hole, work as equipment, when medium (liquid or gas) pressure in container or pipeline is excessive, medium can promote valve and overcome the active force of spring and valve is moved backwards, now medium enters into valve chamber and power-assisted chamber through medium channel by valve front side guiding valve rear side, medium starts power-assisted plug to apply active force, at this moment plug moves after can pulling valve by tension member, the acting in conjunction of valve under tension member pulling force and valve front side pressure medium, the active force that valve is subject to increases compared to existing technologies, therefore valve can be opened fast, safety valve can be applied in some fields that valve opening speed is had relatively high expectations and use.
Brief description of the drawings
Fig. 1 is an embodiment's of the present utility model structural representation;
Fig. 2 is the cooperation schematic diagram of valve in Fig. 1, pull bar and power-assisted plug;
Fig. 3 is the structural representation of valve body in Fig. 1.
Embodiment
A kind of embodiment of safety valve is as shown in Fig. 1 ~ 3: comprise the valve body 17 with valve pocket, valve pocket is the stepped cavity that an axis extends along fore-and-aft direction, the macropore section of stepped cavity forms power-assisted chamber 18, and the aperture section of stepped cavity forms valve chamber 19, and valve chamber 19 is positioned at 18 front sides, power-assisted chamber.The front end of valve body is provided with the medium inlet hole being communicated with valve chamber, medium inlet hole is the shoulder hole that an axis extends along fore-and-aft direction, the aperture section and the macropore section that before and after shoulder hole has, arrange, the macropore section 14 of shoulder hole is positioned at the rear side of the aperture section 15 of shoulder hole, the punching section of shoulder hole is connected by the transition of cone shape hole section with aperture section, the aperture of the macropore section of shoulder hole is along the seal lip 13 that is above provided with a ring shape, backwards pointed of the one-tenth tip, cross section of seal lip 13, in valve chamber, be provided with and be subject to acting force of the spring and the valve 16 of front end shutoff medium inlet hole, valve 16 comprises valve body 9 and is arranged at the seal ring 12 of valve body front end, seal ring is for being sealed and matched with seal lip, rear side in valve in valve chamber is equipped with spring seat 6 along fore-and-aft direction guiding movement, spring is that the stage clip 8 between spring seat and valve is located on top, on the chamber wall in power-assisted chamber, be installed with the adjustment seat 5 that can move forward and backward in the rear side of spring seat, the step surface of valve pocket can limit the leading mobile limit of adjustment seat, in adjustment seat, be installed with and can move forward and backward, the adjustment sleeve 3 of front end and spring seat 6 top, rear end press fits, on the outer circumferential face of adjustment sleeve 3, be installed with locking nut 4.Rear side in adjustment seat in power-assisted chamber has power-assisted plug 1 along fore-and-aft direction sealing guiding slidable fit, the face area of power-assisted plug 1 is greater than the face area of valve 16, power-assisted plug 1 is in transmission connection by tension member and valve, tension member is the pull bar 7 that axis extends along fore-and-aft direction, pull bar is arranged in along fore-and-aft direction guiding movement in the endoporus of spring seat 6 and adjustment sleeve 3, the front end of pull bar 7 is fixedly connected with valve 16, the rear end of pull bar 7 is fixedly connected with power-assisted plug 1, in the time of valve shutoff medium inlet hole, power-assisted plug is positioned at the accent place, rear end in power-assisted chamber, while moving after power-assisted plug, between power-assisted plug and valve body, form media outlet.On adjustment seat and spring seat, be provided with the axial hole 10,11 passing through along fore-and-aft direction for medium.Turning up to have to connect and turn edge 2 in the rear end of valve body, on connection turns edge, is provided with the screw perforation that axis extends along fore-and-aft direction.Between valve and valve body, be provided with in the time that medium inlet hole is opened the medium channel (not shown) by valve front side guiding valve rear side by medium.On power-assisted plug, be provided with axial vent holes 20, to prevent in the time that power-assisted plug does not depart from power-assisted chamber, the excessive and safety problem that causes of pressure in power-assisted chamber.
Safety valve can be applied in gas or liquid medium and use, as an example of use in gas example, the using process of safety valve is described below: in the time carrying out safety valve assembling, first do not fill power-assisted plug and locking nut, by rotary regulating sleeve, adjust the position of spring seat, realize the adjustment of spring force, thereby adjust the cracking pressure of valve, after cracking pressure is set up, locking nut fastening is installed, is completed the adjustment of cracking pressure.By embedded this safety valve equipment, container or the pipeline inside of being installed on, valve rear end face and power-assisted plug ear end face are spherical, when therefore this safety valve is installed on spherical equipment or container, comparatively attractive in appearance, and not outstanding position can scratch staff.In use, medium enters valve from medium inlet hole, in the time that pressure medium is greater than spring force, promoting valve moves backwards, valve opening, medium by medium channel lead valve rear side and enter into power-assisted chamber, power-assisted plug is subject to medium active force backwards, power-assisted plug moves after driving valve by pull bar, after valve is rapid under the acting in conjunction of draw-bar pull and valve front side pressure medium, move, the face area that the face area of power-assisted plug is greater than valve makes power-assisted plug can obtain larger medium active force compared with valve, pull bar can provide larger pulling force for valve like this, after power-assisted plug, move past in journey simultaneously, media outlet between power-assisted plug and valve body also can ceaselessly increase, can realize so the rapid discharge of medium, after power-assisted plug is deviate from by power-assisted cavity rear end, be subject to the leading role in valve body and valve chamber, can there is not deflection in the moving direction of power-assisted plug.By the use of power-assisted plug, can accelerate the motion of valve, valve is discharged rapidly.Medium inlet hole why adopt pre-small post-large shoulder hole be because: if the aperture of medium inlet hole is less, the cracking pressure of safety valve is just less so, the power on spring of acting in the time that safety valve is opened is less, spring rate is less, the design processing tool of spring acquires a certain degree of difficulty, and if valve working is in unrestful environment, such as vibration, impact etc., can cause valve ceaselessly to be opened, close, affect the normal work of system, for fear of the generation of above-mentioned phenomenon, medium inlet hole adopts shoulder hole, the macropore section of shoulder hole has increased medium and has been applied to the maximum force on valve, so not only the design of spring and difficulty of processing reduce greatly, and ensure the antivibration of model utility, shock resistance, axial vent holes can also not established.
In other embodiment of the present utility model: medium inlet hole can not be also shoulder hole, such as being a cylindrical hole that common diameter is consistent; Media outlet can also be only located on power-assisted plug or valve body; Certainly in the time of valve shutoff medium inlet hole, power-assisted plug also can not be positioned at the accent place, rear end in power-assisted chamber, such as is positioned at the front end in power-assisted chamber; Pull bar can also be replaced by tension members such as stay cords, in the time that tension member is stay cord, valve pocket can not be the lineal shape chamber that axis extends along fore-and-aft direction, such as valve pocket is L shaped chamber, valve chamber is positioned on the crosspiece in L shaped chamber, power-assisted chamber be positioned at perpendicular section of L shaped chamber upper, now need to arrange reverse wheel or reversing shaft that dragline-transmission is commutated; Adjustment seat, adjustment sleeve and locking nut also can not established, and now spring seat can weld or be integrally formed on valve body; Spring can also be an extension spring, and extension spring is connected between valve front end and valve body; Medium channel can also only be arranged on valve or valve body, and now medium channel can be axial through bore or the axial through grooves being arranged on valve or valve body; Power-assisted plug can also with the chamber wall Spielpassung in power-assisted chamber; The diameter in power-assisted chamber and valve chamber can also be consistent, and the diameter in valve chamber also can be less than the diameter in power-assisted chamber certainly; The face area of power-assisted plug can also be equal to or less than the face area of valve, now power-assisted plug is subject to the active force of medium in valve pocket and will be equal to or less than valve and be subject to the active force of medium in valve pocket, but compared to existing technologies, valve has still been subject to larger active force backwards, and therefore valve can move faster afterwards.
Claims (10)
1. a safety valve, comprise the valve body with valve pocket, it is characterized in that: valve pocket comprises the valve chamber and the power-assisted chamber that are interconnected, the front end of valve body is provided with the medium inlet hole being communicated with described valve chamber, in valve chamber, be provided with and be subject to acting force of the spring and the valve of medium inlet hole described in front end shutoff, on valve, on valve body or between valve and valve body, be provided with in the time that described medium inlet hole is opened the medium channel by valve front side guiding valve rear side by medium, in described power-assisted chamber, guiding movement is equipped with power-assisted plug, power-assisted plug is in transmission connection by tension member and described valve.
2. safety valve according to claim 1, is characterized in that: the face area of described power-assisted plug is greater than the face area of described valve.
3. safety valve according to claim 1, it is characterized in that: between valve body and power-assisted plug, be provided with media outlet, described power-assisted chamber, valve chamber are coaxially set, described tension member is the pull bar that front end is fixedly connected with described valve, rear end is fixedly connected with described power-assisted plug, described in described valve shutoff when medium inlet hole described in power-assisted plug be positioned at the accent place, rear end in described power-assisted chamber.
4. safety valve according to claim 1, is characterized in that: described power-assisted plug coordinates with the chamber wall sealed sliding action-oriented in described power-assisted chamber.
5. safety valve according to claim 1, it is characterized in that: the rear side in described valve in described valve pocket is equipped with spring seat along fore-and-aft direction guiding movement, described spring is that the stage clip between described spring seat and valve is located on top, rear side in described spring seat in described valve pocket is provided with adjustment seat, in described adjustment seat, be installed with and can move forward and backward, the adjustment sleeve of front end and the top press fit of described spring seat rear end, described tension member is arranged in along fore-and-aft direction guiding movement in the endoporus of described spring seat and described adjustment sleeve, on described adjustment seat and spring seat, be provided with the axial hole passing through along fore-and-aft direction for described medium.
6. safety valve according to claim 5, is characterized in that: on the outer circumferential face of described adjustment sleeve, be installed with locking nut.
7. safety valve according to claim 5, it is characterized in that: described valve pocket is the stepped cavity that axis extends along fore-and-aft direction, the macropore section of stepped cavity forms described power-assisted chamber, the aperture section of stepped cavity forms described valve chamber, described adjustment seat is arranged in described power-assisted chamber, adjustment seat is positioned at described power-assisted plug front side, and described spring seat is arranged in described valve chamber.
8. safety valve according to claim 7, is characterized in that: described tension member is the pull bar that front end is fixedly connected with described valve, rear end is fixedly connected with described power-assisted plug.
9. safety valve according to claim 7, is characterized in that: turning up to have to connect and turn edge in the rear end of described valve body, on connection turns edge, is provided with the screw perforation that axis extends along fore-and-aft direction.
10. according to the safety valve described in claim 1 ~ 9 any one, it is characterized in that: described medium inlet hole is the shoulder hole that axis extends along fore-and-aft direction, and the macropore section of shoulder hole is positioned at the rear side of the aperture section of shoulder hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420171735.6U CN203823167U (en) | 2014-04-10 | 2014-04-10 | Safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420171735.6U CN203823167U (en) | 2014-04-10 | 2014-04-10 | Safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203823167U true CN203823167U (en) | 2014-09-10 |
Family
ID=51478671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420171735.6U Expired - Lifetime CN203823167U (en) | 2014-04-10 | 2014-04-10 | Safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203823167U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968112A (en) * | 2014-04-10 | 2014-08-06 | 河南航天液压气动技术有限公司 | Safety valve |
-
2014
- 2014-04-10 CN CN201420171735.6U patent/CN203823167U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968112A (en) * | 2014-04-10 | 2014-08-06 | 河南航天液压气动技术有限公司 | Safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |
|
| CX01 | Expiry of patent term |