CN203823173U - Pilot relief valve - Google Patents
Pilot relief valve Download PDFInfo
- Publication number
- CN203823173U CN203823173U CN201420142973.4U CN201420142973U CN203823173U CN 203823173 U CN203823173 U CN 203823173U CN 201420142973 U CN201420142973 U CN 201420142973U CN 203823173 U CN203823173 U CN 203823173U
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- CN
- China
- Prior art keywords
- valve
- pilot
- main
- valve body
- spool
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a pilot relief valve which comprises a valve body, and is characterized by further comprising a main valve core, a pilot valve core, and a flow inlet and a flow outlet which are formed in the valve body, wherein the main valve core is arranged in the valve body, the main valve core is internally provided with a main valve spring connected with the inner wall of the valve body, the pilot valve core is arranged in a valve body space on the upper end of the main valve core, the outer circle of the pilot valve core is sleeved with a pilot valve spring connected with the inner wall of the valve body, a through hole which can be communicated with the flow inlet is formed in one side of the main valve core, and the through hole is communicated with the position of the pilot valve core through a passageway in the valve body. According to the utility model, the problems that a relief valve is complex in structure, a valve core is easy to damage, the service life is shorter, a better relief effect cannot be exerted, other equipment cannot be used for effective control due to independent operation, and the pressure of the valve core cannot be regulated are solved, and the pilot relief valve which is simple in structure, convenient to use, can rapidly stabilize overflow, can realize remote control, and can realize regulation is provided.
Description
Technical field
The utility model relates to a kind of valve, particularly relates to a kind of pilot operated compound relief valve.
Background technique
Relief valve is a kind of hydraulic pressure control valve, mainly plays level pressure overflow effect, voltage stabilizing, system unloaded and safety protection effect in hydraulic equipment.In metering pump throttling regulating system, metering pump provides constant flow rate.In the time that system pressure increases, can make traffic demand reduce.Now relief valve is opened, and makes the unnecessary flow oil sump tank that overflows, ensures relief valve inlet pressure, i.e. pump discharge pressure constant (valve port is often with pressure surge unlatching).Pressure stabilization function: relief valve is connected on oil circuit, relief valve produces back pressure, and moving element stationarity increases.System unloaded effect: be connected in series the solenoid valve of the small flow that overflows at the remote control mouth of relief valve, in the time that electromagnet is switched on, the remote control mouth of relief valve leads to fuel tank, now oil hydraulic pump off-load.Relief valve now uses as unloading valve.Safety protection effect: when system is normally worked, valve closing.While only having load to exceed the limit (system pressure exceedes set pressure) of regulation, open overflow, carry out overload protection, make system pressure no longer increase (conventionally make the set pressure of relief valve higher by 10%～20% than system Maximum operating pressure).And current structure of relief valve complexity, and spool easily damages, and working life is shorter, cannot play good overflow effect, and operation alone, cannot control effectively by miscellaneous equipment, and spool pressure cannot regulate, and Applicable scope is less.
Model utility content
In order to solve structure of relief valve complexity in prior art, and spool easily damages, and working life is shorter, cannot play good overflow effect, and operation, cannot control effectively by miscellaneous equipment alone, and spool pressure cannot regulate, the problem that Applicable scope is less, it is a kind of simple in structure, easy to use that the utility model provides, can fast and stable overflow, and can realize telecontrol, realize the pilot operated compound relief valve regulating.
In order to address the above problem, technical solution adopted in the utility model is:
A kind of pilot operated compound relief valve, comprise valve body, it is characterized in that: also comprise on main valve plug, pilot valve spool, described valve body and offer and be equipped with influent stream mouth and go out head piece, in valve body, be provided with main valve plug, described main valve plug inside is provided with the main spool spring being connected with valve interior wall, in the valve space of main valve plug upper end, be provided with pilot valve spool, on described pilot valve spool cylindrical, be arranged with the pilot valve spring being connected with valve interior wall, be provided with the through hole that can be communicated with influent stream mouth in a side of main valve plug, described through hole connects by the runner in valve body and pilot valve valve element position.
Aforesaid a kind of pilot operated compound relief valve, is characterized in that: described through hole is damping hole.
Aforesaid a kind of pilot operated compound relief valve, is characterized in that: in the valve space of main valve plug upper end, be horizontally disposed with pilot valve spool.
Aforesaid a kind of pilot operated compound relief valve, is characterized in that: on pilot valve spool front end respective side valve body, offer remote control orifice.
The utility model beneficial effect is: the utility model pilot operated compound relief valve, simple in structure, easy to use, can stablize and realize fast overflow, and offer remote control orifice on pilot valve spool front end respective side valve body, remote control orifice can be controlled by pressure regulator valve, can carry out pressure adjustment to relief valve, and using effect is better.
Brief description of the drawings
Fig. 1 is the utility model pilot operated compound relief valve structural representation.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, a kind of pilot operated compound relief valve, comprise valve body 9, main valve plug 2 and pilot valve spool 4, on described valve body 9, offer and be equipped with influent stream mouth 6 and go out head piece 7, in valve body 9, be provided with main valve plug 2, described main valve plug 2 inside are provided with the main spool spring 1 being connected with valve body 9 inwalls, in valve body 9 spaces of main valve plug 2 upper ends, be horizontally disposed with pilot valve spool 4, on described pilot valve spool 4 cylindricals, be arranged with the pilot valve spring 5 being connected with valve body 9 inwalls, be provided with the damping hole 3 that can be communicated with influent stream mouth 6 in a side of main valve plug 2, described damping hole 3 connects by the runner 10 in valve body 9 and pilot valve spool 4 positions.On pilot valve spool 4 front end respective side valve bodies 9, offer remote control orifice 8.
The utility model pilot operated compound relief valve, pressure oil enters from influent stream mouth 6, by acting on after damping hole 3 on pilot valve spool 4, when inlet pressure lower, when the hydraulic action on pilot valve spool 4 is not enough to the active force of the pilot valve spring 5 that overcomes pilot valve spool 4 the right, pilot valve cuts out, do not have fluid to flow through damping hole 3, so main valve plug 2 pressure at two ends are equal, under 1 effect of softer main spool spring, main valve plug 2 is in lowest positions, relief valve valve influent stream mouth 6 and go out head piece 7 and cut off, does not have overflow.In the time that inlet pressure is elevated to the hydraulic coupling acting on pilot valve and is greater than pilot valve spring 5 active force, pilot valve is opened, pressure oil just can be by damping hole 3, flow back to fuel tank through pilot valve, due to the effect of damping hole 3, make the hydraulic coupling of main valve plug 2 upper ends be less than lower end hydraulic coupling, in the time that this pressure difference acts on power on main valve plug 2 and exceedes main spool spring 1 power, frictional force and main valve plug 2 and conduct oneself with dignity, main valve plug 2 is opened, fluid flows into from influent stream mouth 6, flows back to fuel tank and realizes overflow through going out head piece 7.
On pilot valve spool 4 front end respective side valve bodies 9, offer remote control orifice 8, it act as: 1, receive another remote pressure regulating valve by oil pipe, by regulating the spring force of remote pressure regulating valve, get final product the hydraulic coupling of regulation relief valve main valve plug upper end, thereby the oil pressure relief of relief valve is carried out to long-range pressure regulation, and the maximum pressure that remote pressure regulating valve can regulate must not exceed the adjustment pressure of the pilot valve of relief valve own.2, by the external multiple remote pressure regulating valves of solenoid directional control valve, can realize multi-stage pressure regulating; 3, by solenoid valve, remote control orifice 8 is connected to fuel tank, the pressure of main valve plug 2 upper ends is very low, and the fluid of system under low pressure flows back to fuel tank by relief valve, realizes off-load.Turning knob, the pre compressed magnitude of change pilot valve spring 5, the i.e. cracking pressure of adjustable pilot operated compound relief valve.
In sum, the utility model pilot operated compound relief valve, simple in structure, easy to use, can stablize and realize fast overflow, and offer remote control orifice 8 on pilot valve spool front end respective side valve body, remote control orifice 8 can be controlled by pressure regulator valve, can carry out pressure adjustment to relief valve, using effect is better.
More than show and described basic principle of the present utility model, major character and advantage.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. a pilot operated compound relief valve, comprise valve body, it is characterized in that: also comprise on main valve plug, pilot valve spool, described valve body and offer and be equipped with influent stream mouth and go out head piece, in valve body, be provided with main valve plug, described main valve plug inside is provided with the main spool spring being connected with valve interior wall, in the valve space of main valve plug upper end, be provided with pilot valve spool, on described pilot valve spool cylindrical, be arranged with the pilot valve spring being connected with valve interior wall, be provided with the through hole that can be communicated with influent stream mouth in a side of main valve plug, described through hole connects by the runner in valve body and pilot valve valve element position.
2. a kind of pilot operated compound relief valve according to claim 1, is characterized in that: described through hole is damping hole.
3. a kind of pilot operated compound relief valve according to claim 2, is characterized in that: in the valve space of main valve plug upper end, be horizontally disposed with pilot valve spool.
4. a kind of pilot operated compound relief valve according to claim 3, is characterized in that: on pilot valve spool front end respective side valve body, offer remote control orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420142973.4U CN203823173U (en) | 2014-03-27 | 2014-03-27 | Pilot relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420142973.4U CN203823173U (en) | 2014-03-27 | 2014-03-27 | Pilot relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203823173U true CN203823173U (en) | 2014-09-10 |
Family
ID=51478677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420142973.4U Expired - Fee Related CN203823173U (en) | 2014-03-27 | 2014-03-27 | Pilot relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203823173U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112228622A (en) * | 2020-11-02 | 2021-01-15 | 扬中市众成管路配件有限公司 | Pilot-operated control type pipeline instrument root valve |
-
2014
- 2014-03-27 CN CN201420142973.4U patent/CN203823173U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112228622A (en) * | 2020-11-02 | 2021-01-15 | 扬中市众成管路配件有限公司 | Pilot-operated control type pipeline instrument root valve |
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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: 20140910 Termination date: 20150327 |
|
| EXPY | Termination of patent right or utility model |