CN201851726U - Pilot overflow valve - Google Patents
Pilot overflow valve Download PDFInfo
- Publication number
- CN201851726U CN201851726U CN2010205997663U CN201020599766U CN201851726U CN 201851726 U CN201851726 U CN 201851726U CN 2010205997663 U CN2010205997663 U CN 2010205997663U CN 201020599766 U CN201020599766 U CN 201020599766U CN 201851726 U CN201851726 U CN 201851726U
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- Prior art keywords
- valve
- plug
- pilot
- spring
- valve body
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Abstract
The utility model discloses a pilot overflow valve, which comprises a pilot valve, and a main valve. The pilot overflow valve is characterized in that the pilot valve comprises a valve body, a valve core, and a pressure regulator; a first liquid cavity and an empty cavity provided with the valve core are arranged on the valve body at intervals; the first liquid cavity and the empty cavity are communicated by a through hole; one end of the valve core is arranged in the through hole; the other end of the valve core is connected with the pressure regulator; the pressure regulator is fixedly arranged on the valve body; the main valve comprises a valve seat, and a plug; an oil inlet and a return opening are arranged on the valve seat; the oil inlet is communicated with the return opening; the plug respectively plugs the oil inlet and the return opening through an end part and a side surface thereof; the plug is connected with the valve body through a pressure spring; and a damping hole is arranged on the plug. The pilot overflow valve has the advantage of good pressure stabilizing performance.
Description
Technical field
The utility model relates to hydraulic control valve, is specifically related to a kind of pilot operated compound relief valve.
Background technique
Existing relief valve adopts the relief valve of direct-acting type mostly, and the working method of this relief valve is: when the oil liquid pressure that inserts from system when filler opening was not high, the cone valve heart was pressed on the valve seat by spring, and valve port is closed.When the import oil pressure is elevated to the energy against the force of the spring, just push cone valve open, valve port is opened, fluid is just flowed into by filler opening, flows back to fuel tank from return opening again, and input pressure also just can not continue to raise.When passing through the changes in flow rate of relief valve, valve port opening is that amount of spring compression also changes thereupon.The major defect of this direct-acting overflow valve is: spring needs bigger rigidity, and when the spillway discharge variation caused that amount of spring compression changes, the variation in pressure of filler opening was big, so its voltage regulation performance is relatively poor.
Summary of the invention
At above-mentioned technical problem, the purpose of this utility model provides the good pilot operated compound relief valve of a kind of voltage regulation performance.
The technological scheme that realizes above-mentioned purpose is as follows:
Pilot operated compound relief valve, comprise pilot valve and main valve, described pilot valve comprises valve body, valve core, regulator, the cavity that is interval with first liquid container on the valve body and valve core is installed, be communicated with by through hole between first liquid container and the cavity, one end of valve core is arranged in through hole, the other end of valve core is connected with regulator, regulator is fixed on the valve body, and described main valve comprises valve seat and plug, and valve seat is provided with filler opening, return opening, filler opening is communicated with return opening, plug stops up filler opening and return opening respectively by its end and side, and plug is connected with valve body by pressure spring, and plug is provided with damping hole.
Described regulator comprises pressure regulating screw and spring, and this pressure regulating screw one end is connected with spring, and the other end of pressure regulating screw is connected with valve body.
The end face that described plug stops up the end of filler opening is the conical surface.
Adopted such scheme, in conjunction with after forming an integral body, by pilot valve control with regulate oil pressure relief, main valve then is overflow to the utility model by pilot valve and main valve.Pilot valve is because only by draining, its valve port diameter is less, even under the situation of elevated pressures, the hydraulic thrust that acts on the valve core is also little, so the rigidity of pressure adjusting spring needn't be very big, and the pressure adjustment is also just lighter.The plug two ends of main valve are subjected to the oil pressure effect, and the pressure spring of main valve only needs very little rigidity, and when the spillway discharge variation caused that the pressure spring decrement changes, the variation in pressure of filler opening was little, so the voltage regulation performance of pilot operated compound relief valve is better than direct-acting overflow valve.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the structural representation in the utility model;
In the accompanying drawing, 1 is valve body, and 11 is first liquid container, and 12 is cavity, and 13 is through hole, and 2 is valve core, and 3 is spring, and 4 is pressure regulating screw, and 51 is filler opening, and 52 is return opening, and 5 is valve seat, and 6 is plug, and 7 is pressure spring, and 8 is damping hole.
Embodiment
With reference to Fig. 1, pilot operated compound relief valve of the present utility model.Comprise pilot valve and main valve.Pilot valve comprises valve body 1, valve core 2, regulator, the cavity 12 that is interval with first liquid container 11 on the valve body 1 and valve core is installed, be communicated with by through hole 13 between first liquid container 11 and the cavity, one end of valve core 2 is arranged in through hole, the other end of valve core is connected with regulator, and regulator is fixed on the valve body.Regulator comprises pressure regulating screw 4 and spring 3, and this pressure regulating screw one end is connected with spring, and the other end of pressure regulating screw is threaded with valve body, and spring 3 is connected with valve core 2.Described main valve comprises valve seat 5 and plug 6, and valve seat 5 is provided with filler opening 51, return opening 52, and filler opening is communicated with return opening.Plug 6 stops up filler opening 51 and return opening 52 respectively by its end and side, and plug 5 is connected with valve body by pressure spring 7, and plug is provided with damping hole 8.The end face that described plug stops up the end of filler opening is the conical surface.
Working procedure of the present utility model is: the spring chamber that arrives main valve when the pressure oil at filler opening 51 places through damping hole 8, and act on the valve core 2 of pilot valve, when input pressure is not high, hydraulic coupling can not overcome spring 3 resistances of pilot valve, the through hole 13 of pilot valve is closed by valve core 2, and no fluid flows in the valve.At this moment, the main valve heart equates that because of the upper and lower cavity oil pressure so be pressed on the valve seat 1 by the spring 7 of main valve, primary valve also is closed condition.When input pressure was elevated to the preset pressure of spring 3 of pilot valve, the through hole 13 of pilot valve was opened, and the fluid in main spool spring chamber flows through poppet port and the passage in valve body and return opening 52 and flows back to fuel tank.At this moment, fluid flows through damping hole 8, produces the pressure loss, makes main valve heart two ends form pressure difference.Main valve heart against the force of the spring under this differential pressure action moves up, and makes into, return opening is communicated with, and reaches the purpose of overflow voltage stabilizing.
Claims (3)
1. pilot operated compound relief valve, comprise pilot valve and main valve, it is characterized in that: described pilot valve comprises valve body, valve core, regulator, the cavity that is interval with first liquid container on the valve body and valve core is installed, be communicated with by through hole between first liquid container and the cavity, one end of valve core is arranged in through hole, the other end of valve core is connected with regulator, regulator is fixed on the valve body, and described main valve comprises valve seat and plug, and valve seat is provided with filler opening, return opening, filler opening is communicated with return opening, plug stops up filler opening and return opening respectively by its end and side, and plug is connected with valve body by pressure spring, and plug is provided with damping hole.
2. pilot operated compound relief valve according to claim 1 is characterized in that: described regulator comprises pressure regulating screw and spring, and this pressure regulating screw one end is connected with spring, and the other end of pressure regulating screw is connected with valve body.
3. pilot operated compound relief valve according to claim 1 is characterized in that: the end face that described plug stops up the end of filler opening is the conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205997663U CN201851726U (en) | 2010-11-09 | 2010-11-09 | Pilot overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205997663U CN201851726U (en) | 2010-11-09 | 2010-11-09 | Pilot overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201851726U true CN201851726U (en) | 2011-06-01 |
Family
ID=44094117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205997663U Expired - Fee Related CN201851726U (en) | 2010-11-09 | 2010-11-09 | Pilot overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201851726U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937200A (en) * | 2012-11-19 | 2013-02-20 | 福建高中压阀门科技有限公司 | Direct-flow piston type adjustable pressure release valve and use method thereof |
| CN104315158A (en) * | 2014-10-09 | 2015-01-28 | 盐城百圣机械有限公司 | Fluid valve capable of being automatically opened and closed |
| CN105422885A (en) * | 2015-11-27 | 2016-03-23 | 苏州市职业大学 | One-way pressure-control tap water valve |
| CN107725845A (en) * | 2017-10-27 | 2018-02-23 | 四川森洁燃气设备有限公司 | A kind of decompression type regulating valve of high pressure relief device |
| CN107829845A (en) * | 2017-10-27 | 2018-03-23 | 四川森洁燃气设备有限公司 | A kind of automobile fuel gas spray track supply amount adjustment method |
| CN107939555A (en) * | 2017-10-27 | 2018-04-20 | 四川森洁燃气设备有限公司 | A kind of supply amount adjusting apparatus of automobile fuel gas spray rail |
-
2010
- 2010-11-09 CN CN2010205997663U patent/CN201851726U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937200A (en) * | 2012-11-19 | 2013-02-20 | 福建高中压阀门科技有限公司 | Direct-flow piston type adjustable pressure release valve and use method thereof |
| CN104315158A (en) * | 2014-10-09 | 2015-01-28 | 盐城百圣机械有限公司 | Fluid valve capable of being automatically opened and closed |
| CN104315158B (en) * | 2014-10-09 | 2016-08-17 | 盐城百圣机械有限公司 | A kind of can the Fluid valve of automatic shutter |
| CN105422885A (en) * | 2015-11-27 | 2016-03-23 | 苏州市职业大学 | One-way pressure-control tap water valve |
| CN107725845A (en) * | 2017-10-27 | 2018-02-23 | 四川森洁燃气设备有限公司 | A kind of decompression type regulating valve of high pressure relief device |
| CN107829845A (en) * | 2017-10-27 | 2018-03-23 | 四川森洁燃气设备有限公司 | A kind of automobile fuel gas spray track supply amount adjustment method |
| CN107939555A (en) * | 2017-10-27 | 2018-04-20 | 四川森洁燃气设备有限公司 | A kind of supply amount adjusting apparatus of automobile fuel gas spray rail |
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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: 20110601 Termination date: 20121109 |