CN105443483A - Overflow valve - Google Patents
Overflow valve Download PDFInfo
- Publication number
- CN105443483A CN105443483A CN201510912006.0A CN201510912006A CN105443483A CN 105443483 A CN105443483 A CN 105443483A CN 201510912006 A CN201510912006 A CN 201510912006A CN 105443483 A CN105443483 A CN 105443483A
- Authority
- CN
- China
- Prior art keywords
- valve
- main
- main valve
- pilot
- adjusting
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/029—Counterbalance valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
Abstract
The invention discloses an overflow valve. The overflow valve comprises a valve cover, a valve body, a main valve core, a main valve seat, a pilot cone valve and a pilot valve seat, wherein the valve cover is arranged at the top of the valve body, the main valve seat is arranged inside the valve body, and the main valve core is arranged on the main valve seat; the pilot valve seat is arranged inside the valve cover, and the pilot cone valve is arranged on the pilot valve seat; the top end of the main valve core is in contact with the pilot cone valve through a main valve spring. The overflow valve further comprises a pressure adjusting spring, an adjusting screw and an adjusting hand wheel; the adjusting spring is arranged at the tail end of the pilot cone valve, the adjusting screw is arranged at the tail end of the adjusting spring, and the tail end of the adjusting screw is connected with the adjusting hand wheel. The overflow valve further comprises a damping hole, and the damping hole is formed in the main valve core. The overflow valve provided by the invention has a small cone valve acting area, and can achieve pressure adjusting conveniently; the main valve spring is flexible, the pressure fluctuation is small, and the static characteristic is excellent; the main valve core adopts a conical surface valve seat type structure for sealing, overlapping is avoided, and actions are sensitive.
Description
Technical field
The present invention relates to a kind of relief valve, belong to valve technology field.
Background technique
At present, relief valve is the visual plant in hydraulic system.Its Main Function is the pressure maximum that oil pressure relief by setting up in advance limits system, makes the pressure of system be no more than the setting of relief valve, thus plays overload protective function to system.Direct acting type relief valve in use, usually can run into that pressure regulation is malfunctioning, pressure transient and the fault such as vibration, noise.
Summary of the invention
Object: in order to overcome the deficiencies in the prior art, the invention provides a kind of relief valve.
Technological scheme: for solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of relief valve, comprising: valve gap, valve body, main valve plug, main valve seat, pilot poppet valve, guide's valve seat, described body top is provided with valve gap, is provided with main valve seat in described valve body, and described main valve seat is provided with main valve plug; Be provided with guide's valve seat in described valve gap, described guide's valve seat is provided with pilot poppet valve; Described main valve plug top is contacted with pilot poppet valve by main spool spring.
Also comprise: pressure adjusting spring, adjusting screw, adjusting handle, described pilot poppet valve end is provided with Regulation spring, and Regulation spring end is provided with adjusting screw, and adjusting screw end is connected with adjusting handle.
Also comprise: damping hole, described main valve plug is provided with damping hole.
Also comprise O-ring seals, between described valve gap and valve body, be provided with O-ring seals.
Preferably, described valve gap, valve body all adopt stainless steel.
Preferably, described O-ring seals adopts teflon material.
Beneficial effect: a kind of relief valve provided by the invention, cone valve active area is little, and pressure regulation is light; Main spool spring is soft, and pressure surge is little, and static characteristic is good; Main valve plug adopts conical valve A seating sealing structure, does not have joining amount, is active in one's movements.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, a kind of relief valve, comprising: valve gap 1, valve body 2, main valve plug 3, main valve seat 4, pilot poppet valve 5, guide's valve seat 6, and described valve body 2 top is provided with valve gap 1, is provided with main valve seat 4 in described valve body 2, and described main valve seat 4 is provided with main valve plug 3; Be provided with guide's valve seat 6 in described valve gap 1, described guide's valve seat 6 is provided with pilot poppet valve 5; Described main valve plug 3 top is contacted with pilot poppet valve 5 by main spool spring 7.Also comprise: pressure adjusting spring 8, adjusting screw 9, adjusting handle 10, described pilot poppet valve 5 end is provided with Regulation spring 8, and Regulation spring 8 end is provided with adjusting screw 9, and adjusting screw 9 end is connected with adjusting handle 10.Described main valve plug 3 is provided with damping hole 11.O-ring seals 12 is provided with between described valve gap 1 and valve body 2.
Concrete usage mode is as follows: during use, when main valve inlet connects pressure oil, pressure oil, except the cavity of resorption acting directly on main valve plug, is also guided to the front end of pilot valve, is formed a hydraulic coupling Fx to pilot valve respectively through the damping hole on main valve plug or the guide's valve seat on valve body, valve body.If hydraulic coupling Fx is less than spool the other end spring force Ft, pilot valve is closed, and upper and lower two cavity pressures of main valve plug are equal.Because epicoele active area is greater than cavity of resorption active area, main valve plug is pressed in valve seat orifice by the downward hydraulic coupling formed and spring force acting in conjunction, and main valve valve port is closed.Along with the inlet pressure of relief valve increases, act on hydraulic coupling Fx in pilot valve along with increase, when Fx is more than or equal to Ft, pilot valve valve port is opened, the inlet pressure oil of relief valve overflows to the outlet of relief valve, then oil sump tank through damping hole, pilot valve valve port.Owing to there is pressure difference before and after damping hole, main valve upper cavity pressure is lower than cavity pressure under main valve.When both pressure differences are enough large, the upwards hydraulic coupling formed because of pressure difference overcomes main spool spring and tries hard to recommend on movable valve plug and move, and main valve valve port is opened, and relief valve inlet pressure oil overflows back fuel tank through main valve valve port.Main valve valve port opening one timing, pilot valve core and valve core of main valve are in stress balance respectively, and valve port meets pressure flow equation, and main valve inlet pressure is a determined value.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a relief valve, comprising: valve gap, valve body, is characterized in that: also comprise: main valve plug, main valve seat, pilot poppet valve, guide's valve seat, and described body top is provided with valve gap, is provided with main valve seat in described valve body, and described main valve seat is provided with main valve plug; Be provided with guide's valve seat in described valve gap, described guide's valve seat is provided with pilot poppet valve; Described main valve plug top is contacted with pilot poppet valve by main spool spring.
2. a kind of relief valve according to claim 1, it is characterized in that: also comprise: pressure adjusting spring, adjusting screw, adjusting handle, described pilot poppet valve end is provided with Regulation spring, and Regulation spring end is provided with adjusting screw, and adjusting screw end is connected with adjusting handle.
3. a kind of relief valve according to claim 1 and 2, is characterized in that: also comprise: damping hole, and described main valve plug is provided with damping hole.
4. a kind of relief valve according to claim 3, is characterized in that: also comprise O-ring seals, is provided with O-ring seals between described valve gap and valve body.
5. a kind of relief valve according to claim 3, is characterized in that: described valve gap, valve body all adopt stainless steel.
6. a kind of relief valve according to claim 4, is characterized in that: described O-ring seals adopts teflon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912006.0A CN105443483A (en) | 2015-12-11 | 2015-12-11 | Overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912006.0A CN105443483A (en) | 2015-12-11 | 2015-12-11 | Overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105443483A true CN105443483A (en) | 2016-03-30 |
Family
ID=55554021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510912006.0A Pending CN105443483A (en) | 2015-12-11 | 2015-12-11 | Overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105443483A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286454A (en) * | 2016-10-14 | 2017-01-04 | 广西欧讯科技服务有限责任公司 | A kind of pilot operated compound relief valve |
| CN106382401A (en) * | 2016-10-14 | 2017-02-08 | 广西欧讯科技服务有限责任公司 | Pilot-operated type overflow valve with pressure resisting function |
| CN107420376A (en) * | 2017-05-10 | 2017-12-01 | 中国人民解放军火箭军工程大学 | A kind of built-in pilot valve core vibration displacement signal on-line measuring device |
| 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 |
| CN113864264A (en) * | 2021-09-07 | 2021-12-31 | 刘颖 | Pilot-operated overflow valve |
| CN114321065A (en) * | 2021-12-28 | 2022-04-12 | 靖江市新博液压件有限公司 | Improved structure of pilot one-way overflow valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109329A (en) * | 1985-12-26 | 1987-08-12 | 庄凤龄 | Pilot operated compound relief valve |
| CN203441853U (en) * | 2013-09-04 | 2014-02-19 | 安徽理工大学 | Pilot-operated type water pressure overflow valve of novel structure |
| CN204459330U (en) * | 2015-03-12 | 2015-07-08 | 中国石油大学(华东) | A kind of leading type overflow pressure-stabilizing valve |
-
2015
- 2015-12-11 CN CN201510912006.0A patent/CN105443483A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109329A (en) * | 1985-12-26 | 1987-08-12 | 庄凤龄 | Pilot operated compound relief valve |
| CN203441853U (en) * | 2013-09-04 | 2014-02-19 | 安徽理工大学 | Pilot-operated type water pressure overflow valve of novel structure |
| CN204459330U (en) * | 2015-03-12 | 2015-07-08 | 中国石油大学(华东) | A kind of leading type overflow pressure-stabilizing valve |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286454A (en) * | 2016-10-14 | 2017-01-04 | 广西欧讯科技服务有限责任公司 | A kind of pilot operated compound relief valve |
| CN106382401A (en) * | 2016-10-14 | 2017-02-08 | 广西欧讯科技服务有限责任公司 | Pilot-operated type overflow valve with pressure resisting function |
| CN107420376A (en) * | 2017-05-10 | 2017-12-01 | 中国人民解放军火箭军工程大学 | A kind of built-in pilot valve core vibration displacement signal on-line measuring device |
| CN107420376B (en) * | 2017-05-10 | 2023-04-07 | 中国人民解放军火箭军工程大学 | Built-in pilot valve spool vibration displacement signal on-line measuring device |
| 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 |
| CN113864264A (en) * | 2021-09-07 | 2021-12-31 | 刘颖 | Pilot-operated overflow valve |
| CN114321065A (en) * | 2021-12-28 | 2022-04-12 | 靖江市新博液压件有限公司 | Improved structure of pilot one-way overflow valve |
| CN114321065B (en) * | 2021-12-28 | 2022-12-02 | 靖江市新博液压件有限公司 | Improved structure of pilot one-way overflow valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160330 |
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| RJ01 | Rejection of invention patent application after publication |