CN204344557U - A kind of ultrahigh pressure pilot operated compound relief valve - Google Patents
A kind of ultrahigh pressure pilot operated compound relief valve Download PDFInfo
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- CN204344557U CN204344557U CN201420613221.1U CN201420613221U CN204344557U CN 204344557 U CN204344557 U CN 204344557U CN 201420613221 U CN201420613221 U CN 201420613221U CN 204344557 U CN204344557 U CN 204344557U
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- valve seat
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Abstract
A kind of ultrahigh pressure pilot operated compound relief valve, it is made up of main valve and pilot valve.Pilot valve is made up of regulating hand wheel of pressure, adjusting screw, pilot valve pressure adjusting spring, pilot valve, high strength Separated valve seat and screw plug.Separated valve seat has center hole and two ends are coniform, is pressed on pilot valve body by screw plug, and screw plug and pilot valve body, for being threaded, screw plug have radial and axial hole.Pilot valve core coordinates with high strength Separated valve seat to be formed and firmly seals.Adopt Separated valve seat, structure is simple, install, safeguard and change convenient, solve poor reliability when common pilot operated compound relief valve uses in extra high voltage system, working life short problem, be highly suitable for super high pressure fluid transmission occasion.
Description
Technical field
The utility model relates to Fluid-transmission control field, particularly a kind of high pressure and ultra-high-pressure overflow valve, can be used for the pressure regulating and control in high pressure and super high pressure fluid transmission control.
Background technique
Relief valve is a kind of widely used pressure controlled valve, its basic functional principle be utilize hydrodynamic pressure to produce on spool hydraulic coupling compared with spring force, when hydraulic coupling is greater than pressure adjusting spring power, valve port open and start overflow; When hydraulic coupling is less than pressure adjusting spring power, valve port is closed and stops overflow, thus makes system pressure be basically stable at a certain setting, realizes the control to pressure.
Relief valve is divided into direct-acting overflow valve and pilot operated compound relief valve.Direct-acting overflow valve directly compares with spring force by hydraulic coupling and realizes valve port and open and close, when hydrodynamic pressure is higher, require that spring rate is also larger, but when spring rate is comparatively large or spring comparatively thick after, its control performance is deteriorated, and therefore direct-acting overflow valve is general only in the less low service system of flow.Pilot operated compound relief valve is made up of main valve and pilot valve, when hydraulic coupling is greater than pilot valve pressure adjusting spring power, valve port is opened and is formed skimmer circuit, because the damping hole effect on main valve plug produces Pressure Drop, thus make the upper and lower chamber of main valve plug produce pressure difference, under this pressure difference effect, main valve plug overcomes the unlatching of main spool spring power, realizes overflow.Pilot operated compound relief valve can realize the high-pressure system controlling compared with large discharge with the spring of less rigidity, and its control performance is also better than direct-acting overflow valve, is therefore widely used at Fluid-transmission control field.
No matter be direct-acting overflow valve or pilot operated compound relief valve, its spool opens and closes very frequent, in use usually there will be Fast Wearing or the valve seat damage of spool, makes seal failure and scrap.In extra high voltage system, as pressure rating reaches in the water jet system of 400MPa, because pressure is high, spool or the valve seat of relief valve (or unloading valve) very easily damage in the short time, thus influential system delivery pressure controls, therefore relief valve (or unloading valve) needs often to change, and considerably increases user cost.Therefore, invent a kind of pilot operated compound relief valve structure of applicable extra high voltage system, there is very high realistic meaning and use value.
Summary of the invention
The purpose of this utility model is: in order to overcome in traditional pilot operated compound relief valve using process, particularly in extra high voltage system, cause whole relief valve to be scrapped because of pilot valve valve seat Fast Wearing, the frequent deficiency such as replacing, invent a kind of pilot operated compound relief valve structure being applicable to extra high voltage system, thus solve poor reliability when common pilot operated compound relief valve uses in extra high voltage system, working life short problem.
The purpose of this utility model is achieved like this:
A kind of ultrahigh pressure pilot operated compound relief valve of the utility model, it is made up of main valve 1 and pilot valve 2, it is characterized in that in pilot valve, having regulating hand wheel of pressure 7, adjusting screw 8, pilot valve pressure adjusting spring 6, pilot valve 5, have the Separated valve seat 4 that employing is excellent in cushion effect, wear resistance good material is made in pilot valve body, Separated valve seat 4 is pressed on pilot valve body by screw plug 3.
Above-mentioned Separated valve seat 4 has center hole and two ends are coniform.
Above-mentioned screw plug 3 and pilot valve body, for being threaded, screw plug 3 have radial and axial hole c.
Super high pressure fluid enters main valve 1 from entrance P, through damping hole a, radial and axial hole c on passage b and screw plug and Separated valve seat center hole are applied on pilot valve core 5, when hydrodynamic pressure is lower, fluid is applied to underpressure in pilot valve 5 to overcome the precompression elastic force on pressure adjusting spring 6, pilot valve 5 compresses Separated valve seat 4, be in closed condition, on main valve plug 11, lower cavity pressure equal (Hydrostatic Transfer Device), under main spool spring 10 acts on, main valve plug is also pressed on main valve seat, primary valve is closed, entrance P and oil return inlet T obstructed, can not overflow, pressure when entrance P place increases, when the fluid hydraulic coupling be applied in pilot valve 5 is greater than the precompression elastic force on pressure adjusting spring 6, pilot valve is opened, the damping hole a of fluid on main valve plug, passage b, radial and axial hole c on screw plug, passage e and main valve plug center hole d flows to oil return inlet T, formation fluid flows, now, the damping hole a place of fluid on main valve plug produces Pressure Drop, thus make main valve plug 11 upper cavity pressure be less than lower cavity pressure, under this pressure difference effect, main valve plug overcomes the unlatching of main spool spring power, fluid by entrance P through primary valve overflow to oil return inlet T, realize overflow effect.
Above-mentioned Separated valve seat 4 adopts excellent in cushion effect, wear resistance good material is made, coordinate with pilot valve core 5 to be formed and firmly seal, high strength Separated valve seat 4 one aspect improves valve seat intensity, increases the service life, on the other hand, after spool or the prooving of valve seat, only change spool or valve seat, and without the need to changing whole relief valve.
The utility model compared with prior art, has the following advantages:
1, the Separated valve seat adopting excellent in cushion effect, wear resistance good material to make, effectively can extend the operating life of valve, improve the control performance of relief valve, be highly suitable for super high pressure fluid transmission occasion, particularly in water jet engineer applied (it is even higher that pressure reaches 400MPa), there is very high use value.
2, adopt Separated valve seat, after solving the wearing and tearing of conventional outflow valve base, whole valve scraps problem.After spool, the prooving of valve seat, only change spool or valve seat, and without the need to changing whole relief valve, greatly reduce user cost.
3, adopt Separated valve seat, structure be simple, install, safeguard and change convenient.This technology can be applicable to, in various types of valve arrangement, have a extensive future.
accompanying drawing illustrates:
Fig. 1 is ultrahigh pressure pilot operated compound relief valve structural representation.
Fig. 2 is ultra-high pressure stopped valve arrangement schematic diagram.
Embodiment
Embodiment 1:
Ultrahigh pressure pilot operated compound relief valve as shown in Figure 1, it is made up of main valve 1 and pilot valve 2.Regulating hand wheel of pressure 7, adjusting screw 8, pilot valve pressure adjusting spring 6, pilot valve 5 is had in pilot valve.The Separated valve seat 4 that employing is excellent in cushion effect, wear resistance good material is made is had in pilot valve body, Separated valve seat 4 is pressed on pilot valve body by screw plug 3, Separated valve seat 4 has center hole and two ends are coniform, screw plug 3 and pilot valve body, for being threaded, screw plug 3 have radial and axial hole.
Super high pressure fluid enters main valve 1 from entrance P, through damping hole a, radial and axial hole c on passage b and screw plug and Separated valve seat center hole are applied on pilot valve core 5, when hydrodynamic pressure is lower, fluid is applied to underpressure in pilot valve 5 to overcome the precompression elastic force on pressure adjusting spring 6, pilot valve 5 compresses Separated valve seat 4, be in closed condition, on main valve plug 11, lower cavity pressure equal (Hydrostatic Transfer Device), under main spool spring 10 acts on, main valve plug is also pressed on main valve seat, primary valve is closed, entrance P and oil return inlet T obstructed, can not overflow, pressure when entrance P place increases, when the fluid hydraulic coupling be applied in pilot valve 5 is greater than the precompression elastic force on pressure adjusting spring 6, pilot valve is opened, the damping hole a of fluid on main valve plug, passage b, radial and axial hole c on screw plug, passage e and main valve plug center hole d flows to oil return inlet T, formation fluid flows, now, the damping hole a place of fluid on main valve plug produces Pressure Drop, thus make main valve plug 11 upper cavity pressure be less than lower cavity pressure, under this pressure difference effect, main valve plug overcomes the unlatching of main spool spring power, fluid by entrance P through primary valve overflow to oil return inlet T, realize overflow effect.
Because Separated valve seat 4 adopts excellent in cushion effect, wear resistance good material is made, improve on the one hand valve seat intensity, extend ultrahigh pressure pilot operated compound relief valve working life, on the other hand, after spool or the prooving of valve seat, only change spool or valve seat, and without the need to changing whole relief valve, be highly suitable for super high pressure fluid transmission occasion.
Embodiment 2:
See the ultra-high pressure stopped valve of Fig. 2, screw plug 5 is threaded with valve body 4.Be pressed on stop valve body 4 from formula valve seat 6 by screw plug 5.Turn handle 1, make valve rod promote needle 7 and press to Separated valve seat 6, thus cut off the incoming flow from pipeline 3, thus realize the function of stop valve, the handle of turn in the other direction 1, can open valve port, fluid can flow to pipeline 2 from pipeline 3.
Separated valve seat 4 adopts excellent in cushion effect, and wear resistance good material is made, and improves on the one hand valve seat intensity, extends ultra-high pressure stopped valve working life, on the other hand, after the prooving of valve seat, only change valve seat, and without the need to changing whole stop valve, be highly suitable for super high pressure fluid transmission occasion.
Above-mentioned example is further described foregoing of the present utility model, but this should be interpreted as that the scope of the above-mentioned theme of the utility model is only limitted to above-described embodiment.All technology realized based on foregoing all belong to scope of the present utility model.
Claims (3)
1. a ultrahigh pressure pilot operated compound relief valve, it is made up of main valve (1) and pilot valve (2), regulating hand wheel of pressure (7), adjusting screw (8), pilot valve pressure adjusting spring (6), pilot valve (5) is had in pilot valve, it is characterized in that there is Separated valve seat (4) in pilot valve body, Separated valve seat (4) is pressed on pilot valve body by screw plug (3).
2. ultrahigh pressure pilot operated compound relief valve as claimed in claim 1, is characterized in that Separated valve seat (4) has center hole and two ends are coniform.
3. ultrahigh pressure pilot operated compound relief valve as claimed in claim 1, it is characterized in that screw plug (3) and pilot valve body are for being threaded, (3) have radial and axial hole (c) to screw plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420613221.1U CN204344557U (en) | 2014-10-23 | 2014-10-23 | A kind of ultrahigh pressure pilot operated compound relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420613221.1U CN204344557U (en) | 2014-10-23 | 2014-10-23 | A kind of ultrahigh pressure pilot operated compound relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204344557U true CN204344557U (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420613221.1U Expired - Fee Related CN204344557U (en) | 2014-10-23 | 2014-10-23 | A kind of ultrahigh pressure pilot operated compound relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204344557U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989689A (en) * | 2015-06-21 | 2015-10-21 | 吉安伊斯德纳科技有限公司 | Analog voltage adjustment type hydraulic combination pressure regulating valve |
| CN110966277A (en) * | 2018-09-30 | 2020-04-07 | 江苏凯亚环保科技有限公司 | Overflow valve |
| CN110985729A (en) * | 2020-01-08 | 2020-04-10 | 兰州理工大学 | Ultrahigh pressure overflow valve |
| CN112377652A (en) * | 2020-10-23 | 2021-02-19 | 北京精密机电控制设备研究所 | Plug-in type split valve port internal flow type high-pressure overflow valve |
| CN117967565A (en) * | 2024-03-28 | 2024-05-03 | 新乡市振航机电有限公司 | Composite pilot valve of emulsion pump and use method |
-
2014
- 2014-10-23 CN CN201420613221.1U patent/CN204344557U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989689A (en) * | 2015-06-21 | 2015-10-21 | 吉安伊斯德纳科技有限公司 | Analog voltage adjustment type hydraulic combination pressure regulating valve |
| CN110966277A (en) * | 2018-09-30 | 2020-04-07 | 江苏凯亚环保科技有限公司 | Overflow valve |
| CN110985729A (en) * | 2020-01-08 | 2020-04-10 | 兰州理工大学 | Ultrahigh pressure overflow valve |
| CN112377652A (en) * | 2020-10-23 | 2021-02-19 | 北京精密机电控制设备研究所 | Plug-in type split valve port internal flow type high-pressure overflow valve |
| CN117967565A (en) * | 2024-03-28 | 2024-05-03 | 新乡市振航机电有限公司 | Composite pilot valve of emulsion pump and use method |
| CN117967565B (en) * | 2024-03-28 | 2024-06-07 | 新乡市振航机电有限公司 | Composite pilot valve of emulsion pump and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20151023 |
|
| EXPY | Termination of patent right or utility model |