CN202812344U - Pressure-relief safety valve - Google Patents
Pressure-relief safety valve Download PDFInfo
- Publication number
- CN202812344U CN202812344U CN 201220459289 CN201220459289U CN202812344U CN 202812344 U CN202812344 U CN 202812344U CN 201220459289 CN201220459289 CN 201220459289 CN 201220459289 U CN201220459289 U CN 201220459289U CN 202812344 U CN202812344 U CN 202812344U
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- valve
- pilot
- valve body
- upstream
- main valve
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 49
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of valve devices and equipment, and particularly relates to a pressure-relief safety valve. The pressure-relief safety valve comprises a pilot valve and a main valve, wherein the pressure of an upstream medium when the valve is opened is set through a pressure setting screw on the pilot valve. When the pressure of the upstream medium is larger than a set value, the pilot valve is opened so as to open the main valve, so that the upstream medium is discharged to downstream to reduce the pressure to the set value; and when the pressure of the upstream medium is smaller than or equals to the set value, the pilot valve is closed and the main valve is closed too. The pressure-relief safety valve is reasonable in structure and design, facilitates subsequent maintenance, has a long service life and operates reliably.
Description
Technical field
The utility model belongs to the control valve unit equipment technical field, relates in particular to a kind of pressure relief safety valve.
Background technique
Pressure relief safety valve is by regulating, and inlet pressure is maintained valve commonly used below the predefined value.Pressure relief safety valve usually disposes pilot valve and uses, and namely comprises for the pilot valve of control with for the main valve that moves.In the prior art, the internal structure of pressure relief safety valve is complicated, and the rate of fault height is unfavorable for later maintenance.Simultaneously, the complexity of its structure has determined that also reliability of operation is lower, and working life is short.
The model utility content
The utility model provides a kind of and constructs rationally, is convenient to later maintenance, long service life, reliable pressure relief safety valve for solving the technical problem that exists in the known technology.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is: pressure relief safety valve comprises pilot valve and main valve; Described pilot valve comprises valve body under pilot valve upper valve body and the pilot valve; The top of described pilot valve upper valve body is provided with internal thread part, is equipped with the pressure setting screw in this internal thread part; Valve body is divided into upper valve chamber and lower valve chamber by the transverse slat with center hole under the described pilot valve, described lower valve chamber is divided into upper cavity and lower chamber by the dividing plate with center hole again, sidewall at upper valve chamber is connected with the second upstream, sidewall at upper cavity is connected with the first upstream, sidewall at lower chamber is connected with the downstream pipeline, the end of described the first upstream and the second upstream converges at a upstream house steward, also be connected with on described the first upstream and be in charge of, described convergent point and the pipeline of being in charge of between the tie point are provided with restricting orifice; Also comprise the interlock shutdown system that is positioned on the center line, this system comprises the center-pole that is arranged in the described transverse slat center hole, on described center-pole, be equipped with successively pilot valve spring, pilot valve diaphragm and catch from top to bottom, described pilot valve spring housing is located at the upper end of center-pole, middle part, its edge clamping that described pilot valve diaphragm is fixed in center-pole by fixture block is located under described pilot valve upper valve body and the pilot valve between the valve body, and described catch is fixed in the center-pole bottom, over against the center hole of described dividing plate; Top at described pilot valve spring also is provided with briquetting, and the bottom of described pressure setting screw is against on the described briquetting; Described main valve comprises valve body under main valve upper valve body and the main valve; The upper end of described main valve upper valve body is provided with the center guide hole, and its top is provided with valve gap, also is provided with the pilot line connection mouth on the sidewall of described main valve upper valve body; The two ends of valve body are provided with for the flange that connects upstream and downstream under the described main valve, its inside correspondingly is provided with zone of high pressure and low pressure area, both intersections are provided with valve seat cylindraceous, be provided with positioning seat by a plurality of supports on the described valve seat, this positioning seat is provided with the center guide hole, also is respectively equipped with the pilot line connection mouth on the sidewall of valve body zone of high pressure and low pressure area under the described main valve; Also comprise shutdown system, this system comprises that top and bottom pass respectively under described main valve upper valve body and the main valve valve rod of center guide hole on the valve body, on described valve rod, be equipped with successively main valve diaphragm and I-shaped body from top to bottom, described main valve diaphragm and I-shaped body adopt punch holder and die holder to be fixed in described valve rod middle part, the edge clamping of described main valve diaphragm is located under described main valve upper valve body and the main valve between the valve body, and the lower surface edge place of described I-shaped body is provided with the sealing gasket that cooperates with described valve seat top edge; Described upstream house steward is connected to the pilot line connection mouth on the sidewall of valve body zone of high pressure under the described main valve, described downstream pipeline is connected to the pilot line connection mouth on the valve body low pressure area sidewall under the described main valve, the described pilot line connection mouth that is connected on the described main valve upper valve body sidewall of being in charge of.
Its advantage and good effect are: the utility model reasonable in design, pilot valve carries out accurately, controls easily main valve, makes whole pressure relief safety valve have excellent performance.Connecting pipeline between modular main valve internal structure, pilot valve and the main valve has guaranteed the higher running precision of valve, reliable sealability and long working life.Simultaneously, this pressure relief safety valve also is convenient to cleaning and is safeguarded.
Preferably: described pilot valve diaphragm and main valve diaphragm are the high-strength rubber material.
Preferably: described internal thread part is the nut that is fixed in described pilot valve upper valve body top.
Preferably: between described punch holder and described main valve upper valve body, also be provided with the main spool spring for buffering.
Preferably: described support is three, along circumferentially equal angles distribution.
Preferably: be provided with ball valve described upstream house steward, be in charge of be provided with ball valve, the downstream pipeline is provided with ball valve.
Preferably: be provided with filter described upstream house steward.
Preferably: be provided with throttle valve in described being in charge of.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of pressure relief safety valve pilot valve;
Fig. 3 is the structural representation of pressure relief safety valve main valve.
Among the figure: 1, filter; 2, ball valve; 3, ball valve; 4, restricting orifice; 5, throttle valve; 6, pilot valve; 6-1, the first upstream; 6-2, the second upstream; 6-3, nut; 6-4, pilot valve upper valve body; 6-5, pilot valve diaphragm; 6-6, pressure setting screw; 6-7, briquetting; 6-8, pilot valve spring; 6-9, downstream pipeline; Valve body under 6-10, the pilot valve; 6-11, dividing plate; 6-12, catch; 7, ball valve; 8, main valve; 8-1, valve gap; 8-2, valve rod; 8-3, main spool spring; 8-4, valve seat; 8-5, main valve upper valve body; 8-6, main valve diaphragm; 8-7, shutdown system; 8-8, sealing gasket; Valve body under 8-9, the main valve.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
See also Fig. 1, the utility model comprises pilot valve 6 and main valve 8, and pilot valve 6 plays the effect of control main valve 8 response actions, and main valve 8 is used for from upstream bleed downstream medium.Connect by pipeline between the two, on these pipelines, also be provided with a plurality of devices such as filter, throttle valve and ball valve, realize filtration, throttling and manually control function.
Fig. 2 is the structural representation of pilot valve.Pilot valve 6 comprises valve body 6-10 under the pilot valve upper valve body 6-4 that is docking together and the pilot valve.
Pilot valve upper valve body 6-4 is preferably cone shape, is provided with internal thread part on its top and is used for wearing pressure setting screw 6-6, and in the present embodiment, internal thread part is the nut 6-3 that is fixed in the cone top.
Valve body 6-10 is divided into upper valve chamber and lower valve chamber by the transverse slat with center hole under the pilot valve, and lower valve chamber is divided into upper cavity and lower chamber by the dividing plate 6-11 with center hole again.Wherein, sidewall at upper valve chamber is connected with the second upstream 6-2, sidewall at upper cavity is connected with the first upstream 6-1, sidewall at lower chamber is connected with downstream pipeline 6-9, the end of the first upstream 6-1 and the second upstream 6-2 converges at a upstream house steward, also be connected with on the first upstream 6-1 and be in charge of, convergent point and the pipeline of being in charge of between the tie point are provided with restricting orifice 4.
Also comprise the interlock shutdown system that is positioned on the center line.This system comprises the center-pole that is arranged in the transverse slat center hole, and transverse slat plays the effect of firm support center-pole simultaneously herein.On center-pole, be equipped with successively pilot valve spring 6-8, pilot valve diaphragm 6-5 and catch 6-12 from top to bottom, wherein pilot valve spring 6-8 is sheathed on the upper end of center-pole, middle part, its edge clamping that pilot valve diaphragm 6-5 is fixed in center-pole by fixture block is located under pilot valve upper valve body 6-4 and the pilot valve between the valve body 6-10, pilot valve diaphragm 6-5 is the high-strength rubber material herein, and catch 6-12 is fixed in the center-pole bottom, over against the center hole of dividing plate 6-11.
Top at described pilot valve spring 6-8 also is provided with briquetting 6-7, and the bottom of pressure setting screw 6-6 is against on the briquetting 6-7.
Fig. 3 is the structural representation of main valve.Main valve 8 comprises valve body 8-9 under main valve upper valve body 8-5 and the main valve.
The upper end of main valve upper valve body 8-5 is provided with the center guide hole, its top is provided with valve gap 8-1, and this valve gap 8-1 should have threaded joints, can be used for installing the valves such as outlet valve, and internal gas is discharged.Sidewall at main valve upper valve body 8-5 is provided with the pilot line connection mouth.
The two ends of valve body 8-9 are provided with for the flange that connects upstream and downstream under the main valve, and its inside correspondingly is provided with zone of high pressure and low pressure area.The intersection of zone of high pressure and low pressure area is provided with valve seat 8-4 cylindraceous, and the upper support that distributes by three circumferential equal angles of this valve seat 8-4 is provided with positioning seat, and this positioning seat is provided with the center guide hole.Under main valve, also be respectively equipped with the pilot line connection mouth on the sidewall of valve body 8-9 zone of high pressure and low pressure area.
Also comprise shutdown system 8-7, this system comprises that top and bottom pass respectively the valve rod 8-2 of the upper center of valve body 8-9 under main valve upper valve body 8-5 and main valve guide hole, is equipped with successively the main valve diaphragm 8-6 of high-strength rubber material and the I-shaped body of metal material on valve rod 8-2 from top to bottom.Main valve diaphragm 8-6 and I-shaped body adopt punch holder and die holder to be fixed in valve rod 8-2 middle part, and the edge clamping of main valve diaphragm 8-6 is located under main valve upper valve body 8-5 and the main valve between the valve body 8-9.The lower surface edge place of I-shaped body is provided with the sealing gasket 8-8 that cooperates with valve seat 8-4 top edge, and when sealing gasket 8-8 props up valve seat 8-4, the zone of high pressure of valve body 8-9 and low pressure area are separated under the main valve.
Between punch holder and main valve upper valve body 8-5, main spool spring 8-3 is set in the present embodiment, can plays buffer function to the motion of shutdown system 8-7.
Pipeline connecting mode between pilot valve 6 and the main valve 8 is as follows: the upstream house steward of pilot valve 6 is connected to the pilot line connection mouth on the sidewall of valve body 8-9 zone of high pressure under the main valve, the downstream pipeline 6-9 of pilot valve 6 is connected to the pilot line connection mouth on the valve body 8-9 low pressure area sidewall under the main valve, pilot valve 6 be in charge of the pilot line connection mouth that is connected on the main valve upper valve body 8-5 sidewall.Wherein, be provided with filter 1 and ball valve 2 the upstream house steward, filter 1 should be positioned near pilot valve 6 one sides; Be provided with throttle valve 5 and ball valve 3 being in charge of, throttle valve 5 should be positioned near pilot valve 6 one sides; Downstream pipeline 6-9 is provided with ball valve 7.The effect of filter 1 is that the medium that flows into pilot valve 6 is filtered, prevent inside from sneaking into impurity and affect using effect, the effect of throttle valve 5 is the speed of regulating medium circulation between pilot valve 6 and the main valve upper valve body 8-5, and the effect of each ball valve is the manual shutoff that realizes whole pressure relief safety valve each several part.
The working procedure of this example: each parts of the interlock shutdown system of pilot valve 6 are subjected to the effect of following several power: 1. elastic force, namely regulate the power that the position of pressure setting screw 6-6 produces pilot valve spring 6-8 compression, and direction is downward; 2. the pressure that upstream medium pressure that pilot valve diaphragm 6-5 is produced, size approximate the upstream medium multiply by the surface area of pilot valve diaphragm 6-5, and direction upwards; 3. the pressure that upstream medium pressure that catch 6-12 is produced, size approximate the upstream medium multiply by the surface area of catch 6-12, and direction is downward; 4. the pressure that downstream media pressure that catch 6-12 is produced, size approximate downstream media multiply by the surface area of catch 6-12, and direction upwards.Because the area of catch 6-12 is less, the elastic force that effect two pressure approximate equilibriums thereon, the switch of the shutdown system that therefore links depend on pilot valve spring 6-8 and upstream medium are to the equilibrium condition between the pressure of pilot valve diaphragm 6-5 generation.
The pressure that pilot valve diaphragm 6-5 is produced when the upstream medium is during greater than elastic force, center-pole upwards, catch 6-12 breaks away from the center hole of dividing plate 6-11, high-pressure medium among the pressure relief safety valve main valve upper valve body 8-5 through be in charge of, center hole and the downstream pipeline 6-9 of the first upstream 6-1, dividing plate 6-11 release into low voltage side, this moment, restricting orifice 4 prevented that effectively high-pressure medium is back to the upstream.Main valve 8 is opened afterwards, and its high pressure side and low voltage side are communicated with, and the high-pressure medium downstream of releasing fast reduces the pressure of upstream medium, until equal predefined value.
The pressure that pilot valve diaphragm 6-5 is produced when the upstream medium is during less than or equal to elastic force, center-pole is downward, catch 6-12 seals the center hole of dividing plate 6-11 again, be that pilot valve is closed, the upstream high-pressure medium through upstream house steward, the first upstream 6-1, be in charge of that to reenter main valve upper valve body 8-5 inner, main valve 8 is closed.
Claims (8)
1. a pressure relief safety valve is characterized in that: comprise pilot valve (6) and main valve (8);
Described pilot valve (6) comprises valve body (6-10) under pilot valve upper valve body (6-4) and the pilot valve; The top of described pilot valve upper valve body (6-4) is provided with internal thread part, is equipped with pressure setting screw (6-6) in this internal thread part; Valve body under the described pilot valve (6-10) is divided into upper valve chamber and lower valve chamber by the transverse slat with center hole, described lower valve chamber is divided into upper cavity and lower chamber by the dividing plate (6-11) with center hole again, sidewall at upper valve chamber is connected with the second upstream (6-2), sidewall at upper cavity is connected with the first upstream (6-1), sidewall at lower chamber is connected with downstream pipeline (6-9), the end of described the first upstream (6-1) and the second upstream (6-2) converges at a upstream house steward, also be connected with on described the first upstream (6-1) and be in charge of, described convergent point and the pipeline of being in charge of between the tie point are provided with restricting orifice (4); Also comprise the interlock shutdown system that is positioned on the center line, this system comprises the center-pole that is arranged in the described transverse slat center hole, on described center-pole, be equipped with successively pilot valve spring (6-8) from top to bottom, pilot valve diaphragm (6-5) and catch (6-12), described pilot valve spring (6-8) is sheathed on the upper end of center-pole, described pilot valve diaphragm (6-5) is fixed in the middle part of center-pole by fixture block, its edge clamping is located under described pilot valve upper valve body (6-4) and the pilot valve between the valve body (6-10), and described catch (6-12) is fixed in the center-pole bottom, center hole over against described dividing plate (6-11); Also be provided with briquetting (6-7) on the top of described pilot valve spring (6-8), the bottom of described pressure setting screw (6-6) is against on the described briquetting (6-7);
Described main valve (8) comprises valve body (8-9) under main valve upper valve body (8-5) and the main valve; The upper end of described main valve upper valve body (8-5) is provided with the center guide hole, and its top is provided with valve gap (8-1), also is provided with the pilot line connection mouth on the sidewall of described main valve upper valve body (8-5); The two ends of valve body under the described main valve (8-9) are provided with for the flange that connects upstream and downstream, its inside correspondingly is provided with zone of high pressure and low pressure area, both intersections are provided with valve seat cylindraceous (8-4), described valve seat (8-4) is upper to be provided with positioning seat by a plurality of supports, this positioning seat is provided with the center guide hole, also is respectively equipped with the pilot line connection mouth on the sidewall of valve body (8-9) zone of high pressure and low pressure area under the described main valve; Also comprise shutdown system (8-7), this system comprises that top and bottom pass respectively the valve rod (8-2) of the upper center of valve body (8-9) under described main valve upper valve body (8-5) and main valve guide hole, on described valve rod (8-2), be equipped with successively main valve diaphragm (8-6) and I-shaped body from top to bottom, described main valve diaphragm (8-6) and I-shaped body adopt punch holder and die holder to be fixed in described valve rod (8-2) middle part, the edge clamping of described main valve diaphragm (8-6) is located under described main valve upper valve body (8-5) and the main valve between the valve body (8-9), and the lower surface edge place of described I-shaped body is provided with the sealing gasket (8-8) that cooperates with described valve seat (8-4) top edge;
Described upstream house steward is connected to the pilot line connection mouth on the sidewall of valve body under the described main valve (8-9) zone of high pressure, described downstream pipeline (6-9) is connected to the pilot line connection mouth on valve body under the described main valve (8-9) the low pressure area sidewall, the described pilot line connection mouth that is connected on described main valve upper valve body (8-5) sidewall of being in charge of.
2. according to pressure relief safety valve claimed in claim 1, it is characterized in that: described pilot valve diaphragm (6-5) and main valve diaphragm (8-6) are the high-strength rubber material.
3. according to pressure relief safety valve claimed in claim 1, it is characterized in that: described internal thread part is for being fixed in the nut (6-3) at described pilot valve upper valve body (6-4) top.
4. according to pressure relief safety valve claimed in claim 1, it is characterized in that: between described punch holder and described main valve upper valve body (8-5), also be provided with the main spool spring (8-3) for buffering.
5. according to pressure relief safety valve claimed in claim 1, it is characterized in that: described support is three, along circumferentially equal angles distribution.
6. according to each described pressure relief safety valve of claim 1 to 5, it is characterized in that: be provided with ball valve (2) described upstream house steward, be in charge of be provided with ball valve (3), downstream pipeline (6-9) is provided with ball valve (7).
7. according to pressure relief safety valve claimed in claim 6, it is characterized in that: be provided with filter (1) described upstream house steward.
8. according to pressure relief safety valve claimed in claim 6, it is characterized in that: be provided with throttle valve (5) in described being in charge of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220459289 CN202812344U (en) | 2012-09-11 | 2012-09-11 | Pressure-relief safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220459289 CN202812344U (en) | 2012-09-11 | 2012-09-11 | Pressure-relief safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202812344U true CN202812344U (en) | 2013-03-20 |
Family
ID=47871214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220459289 Expired - Fee Related CN202812344U (en) | 2012-09-11 | 2012-09-11 | Pressure-relief safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202812344U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318053A (en) * | 2015-02-17 | 2016-02-10 | 刘海亮 | Membrane auxiliary type compression bar destabilizing trigger type pressure relief device applied to micro-pressure working condition |
| CN109707882A (en) * | 2019-01-15 | 2019-05-03 | 胡海潮 | Valve type safety pressure relief device for water delivery pipeline |
| CN110207015A (en) * | 2019-06-21 | 2019-09-06 | 湖南雄鹰烟草材料有限公司 | A kind of Novel tobacco capsule essential oil transportation system and method |
-
2012
- 2012-09-11 CN CN 201220459289 patent/CN202812344U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318053A (en) * | 2015-02-17 | 2016-02-10 | 刘海亮 | Membrane auxiliary type compression bar destabilizing trigger type pressure relief device applied to micro-pressure working condition |
| CN109707882A (en) * | 2019-01-15 | 2019-05-03 | 胡海潮 | Valve type safety pressure relief device for water delivery pipeline |
| CN109707882B (en) * | 2019-01-15 | 2020-04-17 | 温州市简弈科技有限公司 | Valve type safety pressure relief device for water delivery pipeline |
| CN110207015A (en) * | 2019-06-21 | 2019-09-06 | 湖南雄鹰烟草材料有限公司 | A kind of Novel tobacco capsule essential oil transportation system and method |
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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: 20130320 Termination date: 20130911 |