CN204300442U - A kind of pressure lever type safe pressure relief device - Google Patents
A kind of pressure lever type safe pressure relief device Download PDFInfo
- Publication number
- CN204300442U CN204300442U CN201420674263.6U CN201420674263U CN204300442U CN 204300442 U CN204300442 U CN 204300442U CN 201420674263 U CN201420674263 U CN 201420674263U CN 204300442 U CN204300442 U CN 204300442U
- Authority
- CN
- China
- Prior art keywords
- depression bar
- flap
- relief device
- cover plate
- valve rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Safety Valves (AREA)
Abstract
The utility model provides a kind of pressure lever type safe pressure relief device, and its valve seat is threaded connection on valve body; Be fixed with cover plate above valve body, cover plate central has centre bore, and the other end and the valve rod of flap are threaded connection, and valve rod is connected with depression bar through the centre bore of cover plate; Depression bar is stainless steel, prismatic circular elongated bar, and depression bar is by lower end dop clamping valve rod, and depression bar to be threaded hexagon-headed bolt lower end by upper end dop; This hexagon-headed bolt to be fixed in bracket cover in the heart, is locked by hexagon-headed bolt by locking nut; Bracket cover is by 3 strut support on the cover board side; 3 pole cylindricals overlap respectively and have steel pipe sleeve, play the effect of supporting bracket lid; The pin basket structure of cover plate, bracket cover, pole, steel pipe sleeve composition solid, as the supporting construction supporting depression bar.The utility model device overall structure is simple, and sealing reliability is high, and medium can be avoided to leak outside.
Description
Technical field
The utility model relates to a kind of pressure relief device for bearing device overpressure protection, and be the non-closed pressure relief device again of a kind of pressure lever type, this device is opened automatically when system pressure exceedes setting value, reaches the object of safety relief.
Background technology
Current, pressure relief device is widely used in each department of the national economy such as oil, chemical industry, power station, metallurgy, nuclear power, national defence.Along with the raising of production efficiency, relevant department and enterprise more and more stricter for the requirement of environmental protection, secure context.As the requisite part of accident bleed-off system, also more harsh to providing the stability of the pressure relief device of overpressure protection, reliability and sealing requirements.
For petroleum chemical industry ground flare system; its medium is generally inflammable, explosive, poisonous harmful chemical substance; operating pressure is lower; be generally several kPas to tens kPas; in the overpressure protection of its staged control valve bypass, the reliability of pressure relief device, stability and sealing property are required very harsh.Conventional security valve is not suitable for pressure lower than the operating mode of 100 kPas, has that opening pressure is inaccurate, overpressure is comparatively large, the response problems such as not in time in low pressure.Though rupture disk favorable sealing property, response are rapidly, but because of itself and physical contact between media, its relieving pressure is very large by the impact of corrosive medium, temperature, and when there is fluctuation or ringing in pressure, the stress of rupture disk often reaches more than yield limit and easily plastic deformation occurs, and then causing its character to change, blasting phenomena in advance occurs, and relieving pressure deviation is larger.
In addition, once there is pressure release in conventional security valve and rupture disk class pressure relief device, then production system re-starts verification after must stopping work and dismantle or changes, safeguard time-consuming, require great effort, extremely unbecoming with long-term operation instantly, the requirement of enhancing productivity.
Therefore, have higher opening pressure stability, response in time, good sealing effect and safeguard simply, overpressure protection apparatus efficiently, become the active demand of some industries.
Summary of the invention
The purpose of this utility model is to provide a kind of pressure lever type safe pressure relief device, and it can overcome conventional security valve, the rupture disk Problems existing when some specific operations are applied, can strengthening system run security, stability, enhance productivity.
Realize the technical scheme of the utility model object: a kind of pressure lever type safe pressure relief device, it comprises and is arranged on valve seat in the form of piston in valve body and flap, valve seat is threaded connection on valve body, the inner hole place of flap and valve seat has groove, piston is become in the groove that O type circle two is nested in flap, with the endoporus interference fit of valve seat, realize sealing by extruding O type circle two;
Be fixed with cover plate above valve body, cover plate central has centre bore, and the other end and the valve rod of flap are threaded connection, and valve rod is connected with depression bar through the centre bore of cover plate; Open loop connected in star in the centre bore of cover plate, O type circle one is nested in annular groove, and O type circle one and valve rod interference fit play sealing function;
Depression bar is stainless steel, prismatic circular elongated bar, and depression bar is by lower end dop clamping valve rod, and depression bar to be threaded hexagon-headed bolt lower end by upper end dop; This hexagon-headed bolt to be fixed in bracket cover in the heart, is locked by hexagon-headed bolt by locking nut;
Bracket cover is by 3 strut support on the cover board side; These 3 pole threaded one ends are fixed on cover plate, and other end screw thread is fixed on bracket cover; 3 pole cylindricals overlap respectively and have steel pipe sleeve, play the effect of supporting bracket lid; The pin basket structure of cover plate, bracket cover, pole, steel pipe sleeve composition solid, as the supporting construction supporting depression bar.
A kind of pressure lever type safe pressure relief device as above, the valve seat described in it is threaded connection on valve body, and realizes sealing by pad one.
A kind of pressure lever type safe pressure relief device as above, the cover plate described in it is connected by studs and hex nut with valve body, and realizes sealing by pad two.
A kind of pressure lever type safe pressure relief device as above, the upper end of the flap described in it takes guiding centering section to design, and realizes the coordinating of passing hole and axle the centering that is threaded of valve rod and flap; The radial hole of flap and valve rod is passed in split pin, plays locking thread effect.
A kind of pressure lever type safe pressure relief device as above, the pole described in it is fastenedly connected by hex nut and bracket cover.
A kind of pressure lever type safe pressure relief device as above, its in normal conditions, flap is less than the Buckling Load Fcr of depression bar by the axial compression load F that valve rod is applied on depression bar, and depression bar keeps vertical stable state; Meanwhile, the propulsive thrust of depression bar pushes flap to valve seat by valve rod, and make flap and valve seat close contact, now pressure relief device is in closed condition; When there is superpressure, the axial load F that flap is applied on depression bar by valve rod will be more than or equal to the Buckling Load Fcr of depression bar, depression bar generation unstability, and its effective length moment significantly reduces, thus flap is separated instantaneously with valve seat under pressure medium effect, now pressure relief device is opened.
Effect of the present utility model is:
Pressure lever type safe pressure relief device described in the utility model bears system pressure load by depression bar, and overall structure is simple, can reach rapidly full open state when system pressure exceedes set point in several milliseconds; Have hermetically-sealed construction in the form of piston, sealing reliability is high, even if when the pressure in pressure system is close to set point, also can ensure tight seal all the time.After this pressure lever type pressure relief device pressure release, without the need to dismantling pipeline, can be resetted from outside and being changed depression bar, medium can be avoided to leak outside, being safeguarded simply, quick, inactivity cost is low.
Pressure lever type safe pressure relief device compact overall structure described in the utility model, power transmission moving component is few, reduce the interference of intermediate link for the accuracy of the transmission of power, pressure release trigger mechanism and hermetically-sealed construction reliability high, pressure release state is easy to observe, maintenance workload is little, inactivity cost is low, there is good performance parameter, opening pressure precision reaches as high as 2%, overpressure is lower than 5%, conventional security valve and rupture disk can be substituted in some specific occasions of petroleum chemical industry, alternative conventional springs formula safety valve under some special operation conditions, oil can be widely used in, natural gas, the overpressure protection of the industry devices such as chemical industry.
Adopt depression bar as bearing load element, be installed on the outside of valve body, isolate with medium, can effectively avoid medium temperature and corrosivity for the impact of buckling pressure.Adopt flap in the form of piston and valve base sealing structure, piston is become in the groove that O type circle two is nested in flap, with the inner hole of valve seat, sealing is realized by extruding O type circle two, compared with the flat seal form adopted with conventional security valve, sealing effectiveness is better, all can realize zero leakage before opening, avoids conventional security valve close to leakage problem during opening pressure.The open/close states of pressure relief device is easy to observe.By observing the state of depression bar and valve rod, can judge whether pressure lever type safe pressure relief device there occurs pressure release.In addition, also can at sensing elements such as relevant position position switches, realize the teletransmission of pressure release signal, operating personnel get final product the state of Centralized Monitoring multiple stage pressure lever type safe pressure relief device at central control room, conventional security valve and rupture disk are then difficult to generally realize, need in discharge pipe setting pressure monitoring equipment.After pressure release completes, without the need to stopping work, valve rod can reset by external force by site operation personnel, after flap and valve seat are resealed, changes depression bar, recovers sealing state, realize the reset of pressure lever type safe pressure relief device.
Accompanying drawing explanation
Fig. 1 is a kind of pressure lever type safe pressure relief device structural representation described in the utility model;
Fig. 2 is a kind of pressure lever type safe pressure relief device closed condition schematic diagram described in the utility model;
Fig. 3 is a kind of pressure lever type safe pressure relief device opening schematic diagram described in the utility model.
In figure: 1. valve seat; 2. valve body; 3. flap; 4. valve rod; 5. cover plate; 6. lower end dop; 7. depression bar; 8. upper end dop; 9. bracket cover; 10. pad one; 11. pads two; 12. locking nuts; 13. hexagon-headed bolts; 14. hex nuts; 15. studs; 16. hex nuts; 17.O type circle one; 18. split pins; 19.O type circle two; 20. poles; 21. steel pipe sleeves.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, a kind of pressure lever type safe pressure relief device described in the utility model is further described.
A kind of pressure lever type safe pressure relief device described in the utility model, piston type flap 3 (nested O type circle 2 19) and valve seat 1 are the seals of pressure lever type pressure relief device.Realize sealing when flap 3 and valve seat 1 close contact, realize pressure release when flap 3 is separated with valve seat 1.Depression bar 7 controls the critical component that this device opens or close, and inlet pressure load is delivered to depression bar 7 by flap 3 and valve rod 4, the contact whether its unstability controls flap 3 and valve seat 1 be separated, and then control closedown and the unlatching of pressure relief device.
As shown in Figure 1, a kind of pressure lever type safe pressure relief device concrete structure described in the utility model is as follows:
Valve seat 1 in the form of piston and flap 3 are set in valve body 2.Valve seat 1 is threaded connection on valve body 2, and realizes sealing by pad 1.Flap 3 has groove with the inner hole place of valve seat 1, becomes piston, with the endoporus interference fit of valve seat 1, realize sealing by extruding O type circle 2 19 in the groove that O type circle 2 19 is nested in flap 3.
Be fixed with cover plate 5 above valve body 2, cover plate 5 is connected by studs 15 and hex nut 16 with valve body 2, and realizes sealing by pad 2 11.Cover plate 5 center has centre bore, and the other end and the valve rod 4 of flap 3 are threaded connection, and valve rod 4 is connected with depression bar 7 through the centre bore of cover plate 5; Open loop connected in star in the centre bore of cover plate 5, O type circle 1 is nested in annular groove, and O type circle 1 and valve rod 4 interference fit play sealing function.Do not take the cylindrical open loop connected in star mounting O-shaped rings at valve rod 4, be for the O type circle in process that moves up of valve rod 4 when preventing pressure relief device from opening is exposed to outside cover plate 5 centre bore, cause medium to leak outside.The upper end of flap 3 takes guiding centering section to design, and realizes the coordinating of passing hole and axle the centering that is threaded of valve rod 4 and flap 3; Split pin 18, through the radial hole of flap 3 with valve rod 4, plays locking thread effect.
Depression bar 7 is stainless steel, prismatic circular elongated bar, and depression bar 7 clamps valve rod 4 by lower end dop 6, and depression bar 7 to be threaded hexagon-headed bolt 13 lower end by upper end dop 8; This hexagon-headed bolt 13 to be fixed in bracket cover 9 in the heart, is locked by hexagon-headed bolt 13 by locking nut 12.Depression bar 7 top puts in place by hexagon-headed bolt 13, need not apply pretightning force, ensures that depression bar 7 has the surplus of movement in the vertical direction, because after this device is fit into pressure system, medium acts on the power on flap 3, is delivered to depression bar 7 by valve rod 4, can by depression bar 7 automatic impaction.Hexagon-headed bolt 13 is locked by locking nut 12, in case depression bar 7 loosens in vertical direction, and then affects the setting pressure of valve.
Bracket cover 9 is supported on above cover plate 5 by 3 poles 20; These 3 pole 20 threaded one ends are fixed on cover plate 5, and the other end is fixed on bracket cover 9 by hex nut 14 screw thread; 3 pole 20 cylindricals overlap respectively and have steel pipe sleeve 21, play the effect of supporting bracket lid; Cover plate 5, bracket cover 9, pole 20, steel pipe sleeve 21 form three-dimensional pin basket structure, as the supporting construction supporting depression bar 7.
In normal conditions, bearing device pressure is under the opening pressure of pressure relief device setting, and the pressure reduction P of pressure relief device high-pressure side and low-pressure side is less than setting pressure Pcr.The axial compression load F that flap 3 is applied on depression bar 7 by valve rod 4 also will be less than the Buckling Load Fcr of depression bar 7, and depression bar 7 keeps vertical stable state.Meanwhile, the propulsive thrust of depression bar 7 pushes flap 3 to valve seat 1 by valve rod 4, and make flap 3 and valve seat 1 close contact, now pressure relief device is in closed condition, as shown in Figure 2.
When there is superpressure, system pressure rises to the opening pressure of pressure relief device setting, and the pressure reduction P of relief valve high-pressure side and low-pressure side reaches setting pressure Pcr.The axial load F that flap 3 is applied on depression bar 7 by valve rod 4 also will be more than or equal to the Buckling Load Fcr of depression bar 7, and unstability occurs depression bar 7, and its effective length moment significantly reduces.Thus flap 3 is separated instantaneously with valve seat 1 under pressure medium effect, this timer is opened, as shown in Figure 3.
Operating personnel, by observing the state of depression bar 7 and valve rod 4, can judge whether pressure relief device there occurs pressure release.After pressure release completes, valve rod 4 can reset by external force by operating personnel, after flap 3 and valve seat 1 are resealed, change depression bar 7, with hexagon-headed bolt 13, depression bar 7 is pressed onto position, ensure that depression bar 7 has surplus slightly in the vertical direction, locked with locking nut 12, the reset of pressure lever type safe pressure relief device can be realized.
Realize sealing when flap 3 and valve seat 1 close contact in the utility model, realize pressure release when flap 3 is separated with valve seat 1; Inlet pressure load is delivered to depression bar 7 by flap 3 and valve rod 4, the contact whether its unstability controls flap 3 and valve seat 1 be separated, and then pressure lever type controls closedown and the unlatching of pressure relief device.Described depression bar 7 is the uiform section circular elongated bars only bearing axial compression load based on Euler law design, when the medium load F acted on flap 3 is less than the Buckling Load Fcr of depression bar 7, depression bar 7 will maintain straight line poised state, and have the stability of anti-side interference; When load F reaches Buckling Load Fcr, depression bar 7 will be unstable lateral bend line balance by straight line balance change in moment, and the side interference now applied will be irreversible, i.e. unstability; After there is unstability, depression bar 7 bearing capacity reduces, and the small increase of pressure will cause diastrophic enlarging markedly, and the bending device that makes of depression bar is opened rapidly, in several milliseconds, just can reach full open state.
Claims (6)
1. a pressure lever type safe pressure relief device, it is characterized in that: this device comprises and is arranged on valve seat in the form of piston (1) in valve body (2) and flap (3), valve seat (1) is threaded connection on valve body (2), flap (3) has groove with the inner hole place of valve seat (1), piston is become in the groove that O type circle two (19) is nested in flap (3), with the endoporus interference fit of valve seat (1), realize sealing by extruding O type circle two (19);
Valve body (2) top is fixed with cover plate (5), cover plate (5) center has centre bore, the other end and the valve rod (4) of flap (3) are threaded connection, and valve rod (4) is connected with depression bar (7) through the centre bore of cover plate (5); Open loop connected in star in the centre bore of cover plate (5), O type circle one (17) is nested in annular groove, and O type circle one (17) and valve rod (4) interference fit play sealing function;
Depression bar (7) is stainless steel, prismatic circular elongated bar, depression bar (7) is by lower end dop (6) clamping valve rod (4), and depression bar (7) to be threaded hexagon-headed bolt (13) lower end by upper end dop (8); This hexagon-headed bolt (13) to be fixed in bracket cover (9) in the heart, is locked by hexagon-headed bolt (13) by locking nut (12);
Bracket cover (9) is supported on cover plate (5) top by 3 poles (20); These 3 pole (20) threaded one ends are fixed on cover plate (5), and other end screw thread is fixed on bracket cover (9); 3 pole (20) cylindricals overlap respectively and have steel pipe sleeve (21), play the effect of supporting bracket lid (9); The pin basket structure of cover plate (5), bracket cover (9), pole (20), steel pipe sleeve (21) composition solid, as the supporting construction supporting depression bar (7).
2. a kind of pressure lever type safe pressure relief device according to claim 1, is characterized in that: described valve seat (1) is threaded connection on valve body (2), and realizes sealing by pad one (10).
3. a kind of pressure lever type safe pressure relief device according to claim 1, it is characterized in that: described cover plate (5) is connected by studs (15) and hex nut (16) with valve body (2), and realize sealing by pad two (11).
4. a kind of pressure lever type safe pressure relief device according to claim 1, it is characterized in that: the upper end of described flap (3) takes guiding centering section to design, realize the coordinating of passing hole and axle the centering that is threaded of valve rod (4) and flap (3); Split pin (18), through the radial hole of flap (3) with valve rod (4), plays locking thread effect.
5. a kind of pressure lever type safe pressure relief device according to claim 1, is characterized in that: described pole (20) is fastenedly connected by hex nut (14) and bracket cover (9).
6. a kind of pressure lever type safe pressure relief device according to claim 1, is characterized in that:
In normal conditions, flap (3) is less than the Buckling Load Fcr of depression bar (7) by valve rod (4) the axial compression load F be applied on depression bar (7), and depression bar (7) keeps vertical stable state; Meanwhile, the propulsive thrust of depression bar (7) pushes flap (3) to valve seat (1) by valve rod (4), and make flap (3) and valve seat (1) close contact, now pressure relief device is in closed condition;
When there is superpressure, flap (3) will be more than or equal to the Buckling Load Fcr of depression bar (7) by valve rod (4) the axial load F be applied on depression bar (7), there is unstability in depression bar (7), its effective length moment significantly reduces, thus flap (3) is separated instantaneously with valve seat (1) under pressure medium effect, now pressure relief device is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420674263.6U CN204300442U (en) | 2014-11-05 | 2014-11-05 | A kind of pressure lever type safe pressure relief device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420674263.6U CN204300442U (en) | 2014-11-05 | 2014-11-05 | A kind of pressure lever type safe pressure relief device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204300442U true CN204300442U (en) | 2015-04-29 |
Family
ID=53105983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420674263.6U Active CN204300442U (en) | 2014-11-05 | 2014-11-05 | A kind of pressure lever type safe pressure relief device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204300442U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373645A (en) * | 2014-11-05 | 2015-02-25 | 北京航天动力研究所 | Pressure bar type safety pressure relief device |
| CN104913090A (en) * | 2015-05-24 | 2015-09-16 | 徐州八方安全设备有限公司 | Low-pressure emptying type blasting needle valve |
| CN113833985A (en) * | 2021-09-15 | 2021-12-24 | 杜红涛 | Explosion-proof assembly for pressure container |
| CN114151550A (en) * | 2021-12-09 | 2022-03-08 | 徐州八方安全设备有限公司 | Reclosing type bending pin valve |
-
2014
- 2014-11-05 CN CN201420674263.6U patent/CN204300442U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373645A (en) * | 2014-11-05 | 2015-02-25 | 北京航天动力研究所 | Pressure bar type safety pressure relief device |
| CN104913090A (en) * | 2015-05-24 | 2015-09-16 | 徐州八方安全设备有限公司 | Low-pressure emptying type blasting needle valve |
| CN113833985A (en) * | 2021-09-15 | 2021-12-24 | 杜红涛 | Explosion-proof assembly for pressure container |
| CN113833985B (en) * | 2021-09-15 | 2022-12-27 | 湖北弘仪电子科技股份有限公司 | Explosion-proof assembly for pressure container |
| CN114151550A (en) * | 2021-12-09 | 2022-03-08 | 徐州八方安全设备有限公司 | Reclosing type bending pin valve |
| CN114151550B (en) * | 2021-12-09 | 2023-09-12 | 徐州八方安全设备有限公司 | Reclosing type buckling pin valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104373645A (en) | Pressure bar type safety pressure relief device | |
| CN204300442U (en) | A kind of pressure lever type safe pressure relief device | |
| CN105673966A (en) | Leakage protection and monitoring system for high-temperature flange | |
| CN203772533U (en) | Safety valve online checking matched set | |
| CN204604217U (en) | A kind of stopping transportation pressure changes the device of high compression diameter ball valve | |
| CN205001590U (en) | Guide's formula blasting type pressure relief device | |
| CN106704656A (en) | Pilot-operated blasting type pressure relief device | |
| CN207527085U (en) | A kind of pneumatic pilot-operated type explosion type pressure relief device | |
| CN104538067A (en) | Dismountable cleavage simulating part as well as installation method and cleavage simulation system of dismountable cleavage simulating part | |
| CN106017886B (en) | A kind of rotating detector transformational structure | |
| CN204043906U (en) | A kind of safety valve on-line testing device | |
| CN203665442U (en) | Special tool for disassembling sealing gland | |
| CN207034299U (en) | Gate valve and pipe-line system | |
| CN204628762U (en) | Direct spring loaded safety valve runs vapour test jump aid | |
| CN202350973U (en) | Pressure gauge seat capable of automatically preventing leakage | |
| CN207394354U (en) | The charging line integrating device and crash structure of a kind of hydrogenation machine | |
| CN204805648U (en) | Modularized design high pressure operating mode depression bar unstability triggers type relief valve | |
| CN204805221U (en) | A relief valve for colliery hydraulic system | |
| CN104210652B (en) | A kind of attachment structure of undercarriage | |
| CN201184206Y (en) | Complete valve barrel splash-proof three-purpose valve | |
| CN117923325A (en) | Running load sensor device of pipeline hanging device | |
| CN204724669U (en) | Reactor pressure vessel kingbolt combined integrate stretching-machine structure | |
| CN204628675U (en) | A kind of high pressure emptying type explosion needle-valve | |
| CN219669029U (en) | Manhole door that sign indicating number was hung is pressed to quick detach formula | |
| CN203822395U (en) | Adjusting element for gear case and gear case module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100076 Beijing, Fengtai District, South Road, No. 1, Patentee after: Beijing Inst. of Aerospace Dynamics Patentee after: Beijing Aerospace Petrochemical Technology and Equipment Engineering Corporation Address before: 100076 Beijing, Fengtai District, South Road, No. 1, Patentee before: Beijing Inst. of Aerospace Dynamics Patentee before: Beijing Aerospace Petrochemical Technology and Equipment Engineering Corp. |