CN104235446A - Safety valve with pressure compensation function - Google Patents
Safety valve with pressure compensation function Download PDFInfo
- Publication number
- CN104235446A CN104235446A CN201410373004.4A CN201410373004A CN104235446A CN 104235446 A CN104235446 A CN 104235446A CN 201410373004 A CN201410373004 A CN 201410373004A CN 104235446 A CN104235446 A CN 104235446A
- Authority
- CN
- China
- Prior art keywords
- face
- safety valve
- sealing
- valve
- pressure
- 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.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
Abstract
The invention discloses a safety valve with a pressure compensation function. Four channels are formed in the circumference face of a transition sleeve; sealing elements and a sealing gasket are respectively arranged in inner holes of the transition sleeve; the sealing elements are arranged in a floating seat; the first end face of a valve body is connected with the transition sleeve, and the second end face of the valve body is connected with a plug; the first end face of a spring is connected with a spring seat, and the second end face of the spring is connected with the end face of the plug; a fastening copper sleeve is connected with the transition sleeve, and the first end face of the fastening copper sleeve is connected with the sealing gasket; the first end face of the sealing gasket is connected with the end face of the inner hole of the fastening copper sleeve, and the second end face of the sealing gasket is connected with the end face of the fastening copper sleeve; the right side of the transition sleeve is provided with the sealing elements. According to the safety valve disclosed by the invention, the pressure balance of the action area of a valve plug is realized by a valve plug structure by adopting a stepped structure, and therefore the pressure action area of the safety valve is small when the safety valve is opened; the design of single row of holes is adopted by the valve plug; a force is transmitted between the spring seat and the valve plug through the copper guide sleeve, and therefore friction to a system can be obviously reduced, and the difference between the opening pressure and the closing pressure of the system meets the system requirement and the relevant standard requirement.
Description
Technical field
The present invention relates to a kind of safety valve, be specifically related to a kind of safety valve with pressure compensation.
Background technique
Safety valve is a kind of automatic decompression device driven by pressure medium; as the protective element of hydraulic support; there is the features such as margin of safety is high, response is fast, seal form is reliable, contamination resistance is strong, be used for column cavity of resorption, balance jack upper and lower cavity, advancing jack piston cavity or rod end chamber etc.The quality of safety valve performance directly has influence on hydraulic support and normally runs and personal security, along with the application of high working face, sublevel caving hydrau lic support, working resistance constantly increases, the continuous change of work condition environment, to the stability of safety valve performance and life requirements also more and more higher, its development trend is high-pressure high-flow safety valve, brings challenges to relief valve design, processing, technique.
And safety valve peak rate of flow is 1000L/min on existing Domestic market, its main structure is direct-acting type mechanical spring structure, to the bottleneck of more large discharge development, mainly it increases along with flow restriction safety valve, its spring rate must increase, thus increase the volume and weight of safety valve, all cause very large inconvenience to the detection of safety valve, in-site installation, maintenance.
Summary of the invention
For solving the problem, the present invention proposes one and has pressure compensating type safety valve, and its rated flow reaches 2000L/min, and it has interchangeable Sealing, and sealing is reliable, and repair and replacement are convenient, and element processing is simple, the advantages such as structure is reliable.Concrete technological scheme is as follows:
Have a safety valve for pressure compensation, described safety valve comprises the spacer shell being provided with valve pocket, and is assemblied in spool, sealing gasket, the 4th Sealing, the 5th Sealing, the fastening copper sheathing in valve pocket; Spool adopts the design of trapezium structure, single row of holes, and operationally in its trapezoid area, mineralization pressure amasss for reducing pressure application surface, so that reduce the rigors to spring rate; This kind of structure adopts sliding valve style sealing configuration, strong mainly due to this kind of structure contamination resistance, and sealing is reliable; Valve element circle side face has four apertures, is mainly used in, under large discharge state, feedback pressure is incorporated into floating seat end face; 4th Sealing, the 5th Sealing, sealing gasket are housed in spacer shell endoporus respectively, and these three kinds of Sealings mainly connect with spool, are mainly used in preventing system pressure from leaking; Floating seat built with the second Sealing, the 3rd Sealing, after its fitting tight part inside and outside it anchor ring respectively same guide sleeve, spacer shell connect, its first end face connects with spacer shell, and the second end face connects with spring seat; Valve body first end face is connected with spacer shell by screw thread, and the second end face is connected with screw plug by screw thread; Spring first end face connects with spring seat, and the second end face connects with screw plug end face; Fastening copper sheathing connects with spacer shell through worm structure, and the first end face connects with sealing gasket; Sealing gasket first end face connects with fastening copper sleeve inner hole end face, and the second end face connects with fastening copper sheathing end face; Spacer shell outside thread end face is provided with the first Sealing.
The width of sealing gasket is greater than 2mm, preferentially selects the one in teflon, polyoxymethylene, rubber gasket, combination seal pad.
Preferably described second Sealing, the 3rd Sealing are the one in low coefficient of friction, the O type Sealing of more than NBR90, rubber gasket respectively.
Preferably described first Sealing is the O type Sealing of more than NBR90.
Preferably described 4th Sealing, the 5th Sealing are the one in common O type Sealing, rubber gasket respectively.
The invention has the advantages that:
When safety valve large discharge is opened, system back pressure acts on floating seat thus offsets part hydraulic power, ensures that system pressure does not occur overshoot;
Valve core structure adopts stepped construction realize the pressure balance of spool active area thus ensure that its pressure application surface amasss little when safety valve is opened, therefore reduces the requirement of spring rate, thus is convenient to select spring;
This spool adopts single row of holes design, and liquid pass hole sealing configuration adopts teflon seal formula structure, and can ensure that its friction factor is little on the one hand, closing pressure meets technical requirements, can reduce holistic cost on the other hand;
Spring seat and valve core chamber carry out transmitting force by copper guide sleeve, significantly can reduce system friction, and guarantee system is opened, closing pressure difference meets system and relevant criterion requirement.
Accompanying drawing explanation
Accompanying drawing 1 is the overall structure schematic diagram of safety valve of the present invention;
Accompanying drawing 2 is safety valve spacer shell part-structure enlarged diagram of the present invention;
Reference character is as follows:
1-sealing gasket, 2-guide sleeve, 3-floating seat, the fastening copper sheathing of 4-, 5-spool, 6-spring seat, 7-screw plug, 8-spacer shell, 9-valve body, 10-spring, 11-first Sealing, 12-second Sealing, 13-the 3rd Sealing, 14-the 4th Sealing, 15-the 5th Sealing.
Embodiment
See accompanying drawing 1-2, which show a preferred embodiment according to safety valve of the present invention.
A kind of safety valve with pressure compensation, comprise valve body, spool, spring, spring seat, spacer shell, one end of valve body arranges internal thread, be threaded with spacer shell by internal thread, spring is arranged on valve inner, spool is arranged on spacer shell inside, adopt forge piece of step type structure, spool one end is fixedly connected with spacer shell by fastening copper sheathing, the other end is by spring seat linking springs, the other end of spring connects screw plug, can be realized the decompression function of safety valve at the effect lower valve core of hydrodynamic pressure by spring seat Compress Spring.
For realizing pressure compensation of the present invention, inner at spacer shell, between spacer shell and spring seat, be provided with an annular floating seat, floating seat one end is against the first end face of spacer shell, and the other end is against the first end face of spring seat, spool is provided with aperture, when flow is larger, aperture is connected with the end face fluid of floating seat against one end of spacer shell, for feedback pressure being incorporated into floating seat end face under large discharge state by the passage on spacer shell.For ensureing pressure equilibrium of forces, it is uniform that aperture should arrange multiple and along spool circumferential surface, 4 apertures are preferably set, multiple aperture adopts the design of single row of holes, namely be arranged on the same loop wire of spool, adopt teflon seal formula structure, can ensure that its friction factor is little on the one hand, closing pressure meets technical requirements, can reduce holistic cost on the other hand.Simultaneously, consider that spring seat and valve core chamber operationally relative movement can occur, guide sleeve can be set between floating seat and spring seat, carry out transmitting force by copper guide sleeve, significantly can reduce system friction, the unlatching of guarantee system, closing pressure difference meet system and relevant criterion requirement.
Be understandable that, safety valve is as a kind of fluidic component, and its sealing is quite important.Therefore, between spacer shell and spool, setting gradually sealing gasket, the 5th Sealing and the 4th Sealing, leaking for preventing system pressure; At floating seat arranged outside second Sealing, inner side arranges the 3rd Sealing, for ensureing the working pressure of floating seat; The connection male threaded end that spacer shell is arranged arranges the first Sealing, ensures that the connection of safety valve and other hydraulic unit seals.The width of sealing gasket is greater than 2mm, preferentially selects the one in teflon, polyoxymethylene, rubber gasket, combination seal pad.Second Sealing, the 3rd Sealing are the one in low coefficient of friction, the O type Sealing of more than NBR90, rubber gasket respectively, first Sealing is the O type Sealing of more than NBR90, and the 4th Sealing, the 5th Sealing are the one in common O type Sealing, rubber gasket respectively.
This example in use, under small flow state, when safety valve inlet pressure exceedes Returnning spring precompression active force, spool bore crosses sealing gasket place, and safety valve is opened, and system is through spool bore, back flow channel overflow, now system back pressure is close to zero, because system back pressure is not enough to overcome floating seat frictional force, now floating seat is static, similar with common safety valve structure;
When under large discharge state, in safety valve opening process, system back pressure is enough to overcome floating seat frictional force, floating seat passes through spring seat reaction on spring under back pressure effect, system liquid power under compensation large discharge state, thus can ensure that its system pressure tends towards stability under system large discharge state.
This example is by improving the overall structure of safety valve, adopt pressure compensation project organization, the effect of energy effective compensation hydraulic power under large discharge state, thus realizing the rigidity effectively reducing Returnning spring under equal flow prerequisite, the design for super-flow, high-pressure safety valve provides a kind of scheme basis.
The above; be only patent of the present invention preferably embodiment; but the protection domain of patent of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope of patent diselosesll of the present invention; the change that can expect easily or replacement, within the protection domain that all should be encompassed in patent of the present invention.
Claims (8)
1. one kind has the safety valve of pressure compensation, comprise valve body, spool, spring, spring seat, spacer shell, described valve body screw thread connects described spacer shell, described spring is arranged on described valve inner, described spool is arranged on spacer shell inside, and described spool connects described spring by described spring seat, it is characterized in that: described spacer shell inside is provided with floating seat, described floating seat offers aperture, for feedback pressure being incorporated into described floating seat end face under large discharge state.
2. there is the safety valve of pressure compensation as claimed in claim 1, it is characterized in that: described valve core structure adopts stepped construction to realize the pressure balance of spool active area, and spool path and transition side, large footpath have damping hole;
3. there is the safety valve of pressure compensation as claimed in claim 1, it is characterized in that: described floating seat is arranged between described spacer shell and described spring seat, and described floating seat one end is against the first end face of described spacer shell, the other end is against the first end face of described spring seat.
4. there is the safety valve of pressure compensation as claimed in claim 1, it is characterized in that: between described floating seat and described spring seat, be provided with guide sleeve.
5. the safety valve with pressure compensation as described in as arbitrary in claim 1-3, is characterized in that: be disposed with sealing gasket, the 5th Sealing and the 4th Sealing between described spacer shell and described spool.
6. the safety valve with pressure compensation as described in as arbitrary in claim 1-3, is characterized in that: described floating seat arranged outside has the second Sealing, is provided with the 3rd Sealing inside described floating seat.
7. the safety valve with pressure compensation as described in as arbitrary in claim 5, it is characterized in that: described spacer shell is provided with outside thread, described externally threaded end is provided with the first Sealing.
8. there is the safety valve of pressure compensation as claimed in claim 4, it is characterized in that: the width of described sealing gasket is greater than 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373004.4A CN104235446B (en) | 2014-08-01 | A kind of relief valve with pressure compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373004.4A CN104235446B (en) | 2014-08-01 | A kind of relief valve with pressure compensation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104235446A true CN104235446A (en) | 2014-12-24 |
| CN104235446B CN104235446B (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109154838A (en) * | 2016-04-26 | 2019-01-04 | 牛津流动有限公司 | For controlling the device of fluid flowing |
| CN112555469A (en) * | 2020-11-11 | 2021-03-26 | 北京天地玛珂电液控制系统有限公司 | Constant specific pressure large flow safety valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3406369A1 (en) * | 1984-02-22 | 1985-08-22 | Thyssen Industrie Ag, 4300 Essen | Pressure-relief valve |
| JPH06230833A (en) * | 1992-12-22 | 1994-08-19 | Robert Bosch Gmbh | Method for regulation of pressure limit valve |
| CN2388444Y (en) * | 1999-09-27 | 2000-07-19 | 胡其廉 | Long-life, large flow and antipollution dual-purpose safety valve |
| CN2903377Y (en) * | 2006-04-16 | 2007-05-23 | 刘其峥 | High flow rate hydraulic safety valve |
| CN101275685A (en) * | 2008-03-25 | 2008-10-01 | 北京天地玛珂电液控制系统有限公司 | Emulsifiable solution medium large flow safety valve |
| CN201521309U (en) * | 2009-11-17 | 2010-07-07 | 胡斌杰 | Safety valve |
| CN102428253A (en) * | 2009-04-29 | 2012-04-25 | 布西鲁斯欧洲有限公司 | Pressure relief valve |
| CN103032612A (en) * | 2012-12-12 | 2013-04-10 | 中国航天科技集团公司第六研究院第十一研究所 | Dual-opening-pressure dual-displacement safety valve |
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3406369A1 (en) * | 1984-02-22 | 1985-08-22 | Thyssen Industrie Ag, 4300 Essen | Pressure-relief valve |
| JPH06230833A (en) * | 1992-12-22 | 1994-08-19 | Robert Bosch Gmbh | Method for regulation of pressure limit valve |
| CN2388444Y (en) * | 1999-09-27 | 2000-07-19 | 胡其廉 | Long-life, large flow and antipollution dual-purpose safety valve |
| CN2903377Y (en) * | 2006-04-16 | 2007-05-23 | 刘其峥 | High flow rate hydraulic safety valve |
| CN101275685A (en) * | 2008-03-25 | 2008-10-01 | 北京天地玛珂电液控制系统有限公司 | Emulsifiable solution medium large flow safety valve |
| CN102428253A (en) * | 2009-04-29 | 2012-04-25 | 布西鲁斯欧洲有限公司 | Pressure relief valve |
| CN201521309U (en) * | 2009-11-17 | 2010-07-07 | 胡斌杰 | Safety valve |
| CN103032612A (en) * | 2012-12-12 | 2013-04-10 | 中国航天科技集团公司第六研究院第十一研究所 | Dual-opening-pressure dual-displacement safety valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109154838A (en) * | 2016-04-26 | 2019-01-04 | 牛津流动有限公司 | For controlling the device of fluid flowing |
| CN109154838B (en) * | 2016-04-26 | 2022-05-13 | Ofip有限公司 | Device for controlling the flow of a fluid and pipe section comprising such a device |
| US11460870B2 (en) | 2016-04-26 | 2022-10-04 | Ofip Limited | Device for controlling fluid flow |
| CN112555469A (en) * | 2020-11-11 | 2021-03-26 | 北京天地玛珂电液控制系统有限公司 | Constant specific pressure large flow safety valve |
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Address after: 100013, Beijing, Chaoyang District, Hepingli Youth ditch East Road, building 5, one floor Patentee after: Beijing Tianma Zhikong Technology Co.,Ltd. Address before: 100013, Beijing, Chaoyang District, Hepingli Youth ditch East Road, building 5, one floor Patentee before: BEIJING TIANDI-MARCO ELECTRO-HYDRAULIC CONTROL SYSTEM Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |