CN104948792A - Pilot operated compound relief valve - Google Patents
Pilot operated compound relief valve Download PDFInfo
- Publication number
- CN104948792A CN104948792A CN201410118755.1A CN201410118755A CN104948792A CN 104948792 A CN104948792 A CN 104948792A CN 201410118755 A CN201410118755 A CN 201410118755A CN 104948792 A CN104948792 A CN 104948792A
- Authority
- CN
- China
- Prior art keywords
- valve
- pilot
- main
- operated compound
- compound relief
- 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
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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
- 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
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0426—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with fluid-operated pilot valves, i.e. multiple stage 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
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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
- F16K17/10—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 auxiliary valve for fluid operation of the main valve
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a pilot operated compound relief valve which comprises a valve body. The pilot operated compound relief valve is characterized in that the valve further comprises a main valve element and a pilot valve element, a flow inlet and a flow outlet are formed in the valve body, the main valve element is arranged in the valve body, a main valve spring connected with the inner wall of the valve body is arranged in the main valve element, the pilot valve element is arranged in the valve body space at the upper end of the main valve element, the outer circle of the pilot valve element is sleeved with a pilot valve spring connected with the inner wall of the valve body, a through hole capable of being communicated with the flow inlet is formed in one side of the main valve element, and the through hole runs through the position of the pilot valve element through a flow channel in the valve body. The pilot operated compound relief valve solves the problems that an overflow valve is complex in structure, a valve element is prone to damage, the service life is short, a good overflow effect cannot be achieved, the overflow valve operates independently and cannot be effectively controlled through other devices, and the pressure of a valve element cannot be adjusted, and the pilot operated compound relief valve is simple in structure, convenient to use and capable of overflowing rapidly and stably, and achieving remote control and adjusting.
Description
Technical field
The present invention relates to a kind of valve, particularly relate to a kind of pilot operated compound relief valve.
Background technique
Relief valve is a kind of hydraulic pressure control valve, in hydraulic equipment, mainly play level pressure overflow effect, voltage stabilizing, system unloaded and safety protection effect.In metering pump flow restriction control system, metering pump provides constant flow rate.When system pressure increases, traffic demand can be made to reduce.Now relief valve is opened, and excess traffic is overflow oil sump tank, ensures relief valve inlet pressure, i.e. pump discharge pressure constant (valve port is often opened with pressure surge).Pressure stabilization function: relief valve is connected on oil circuit, relief valve produces back pressure, and moving element stationarity increases.System unloaded effect: the solenoid valve of the small flow that overflows in the remote control mouth serial connection of relief valve, when the solenoid is energized, 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: during system worked well, valve closing.Open overflow when only having load to exceed the limit (system pressure exceedes set pressure) of regulation, carry out overload protection, make system pressure no longer increase (usually make the set pressure of relief valve higher than system Maximum operating pressure by 10% ~ 20%).And current structure of relief valve is complicated, and spool easily damages, and working life is shorter, cannot play good overflow effect, and runs alone, cannot be control effectively by miscellaneous equipment, and spool pressure cannot regulate, and Applicable scope is less.
Summary of the invention
Complicated in order to solve structure of relief valve in prior art, and spool easily damages, working life is shorter, good overflow effect cannot be played, and run alone, cannot be control effectively by miscellaneous equipment, spool pressure cannot regulate, the problem that Applicable scope is less, the invention provides a kind of structure simple, easy to use, can fast and stable overflow, and can telecontrol be realized, realize the pilot operated compound relief valve regulated.
In order to solve the problem, the technical solution used in the present invention is:
A kind of pilot operated compound relief valve, comprise valve body, it is characterized in that: also comprise main valve plug, pilot valve spool, described valve body offer and be equipped with influent stream mouth and go out head piece, main valve plug is provided with in valve body, described main valve plug inside is provided with the main spool spring be connected with valve interior wall, pilot valve spool is provided with in the valve space of main valve plug upper end, described pilot valve spool cylindrical is arranged with the pilot valve spring be connected with valve interior wall, be provided with the through hole that can be communicated with influent stream mouth in the side of main valve plug, described through hole by the runner in valve body and pilot valve valve element position through.
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 the respective side valve body of pilot valve spool front end, offer remote control orifice.
Beneficial effect of the present invention is: pilot operated compound relief valve of the present invention, structure is simple, easy to use, can stablize and realize overflow fast, and remote control orifice is offered on the respective side valve body of pilot valve spool front end, remote control orifice controls by pressure regulator valve, and can carry out pressure adjusting to relief valve, using effect is better.
Accompanying drawing explanation
Fig. 1 is pilot operated compound relief valve structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be 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, described valve body 9 is offered and is equipped with influent stream mouth 6 and goes out head piece 7, main valve plug 2 is provided with in valve body 9, described main valve plug 2 inside is provided with the main spool spring 1 be connected with valve body 9 inwall, pilot valve spool 4 has been horizontally disposed with in valve body 9 space of main valve plug 2 upper end, described pilot valve spool 4 cylindrical is arranged with the pilot valve spring 5 be connected with valve body 9 inwall, the damping hole 3 that can be communicated with influent stream mouth 6 is provided with in the side of main valve plug 2, described damping hole 3 is through with pilot valve spool 4 position by the runner 10 in valve body 9.Pilot valve spool 4 front end respective side valve body 9 offers remote control orifice 8.
Pilot operated compound relief valve of the present invention, pressure oil enters from influent stream mouth 6, by acting on pilot valve spool 4 after damping hole 3, when inlet pressure is lower, when the hydraulic action on pilot valve spool 4 is not enough to the active force of the pilot valve spring 5 overcome on the right of pilot valve spool 4, pilot valve cuts out, do not have fluid to flow through damping hole 3, so main valve plug 2 pressure at two ends is equal, under the effect of softer main spool spring 1, 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.When inlet pressure be elevated to the hydraulic coupling acted on pilot valve be greater than pilot valve spring 5 active force time, pilot valve is opened, pressure oil is just 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 end be less than lower end hydraulic coupling, when this pressure difference power acted on main valve plug 2 exceed main spool spring 1 power, frictional force and main valve plug 2 conduct oneself with dignity time, main valve plug 2 is opened, fluid flows into from influent stream mouth 6, flows back to fuel tank realize overflow through going out head piece 7.
Pilot valve spool 4 front end respective side valve body 9 offers 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, thus long-range pressure regulation is carried out to the oil pressure relief of relief valve, 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 valve of solenoid directional control valve, multi-stage pressure regulating can be realized; 3, by solenoid valve, remote control orifice 8 is connected fuel tank, the pressure of main valve plug 2 upper end is very low, and the fluid of system under low pressure flows back to fuel tank by relief valve, realizes off-load.Turning knob, changes the pre compressed magnitude of pilot valve spring 5, i.e. the cracking pressure of adjustable pilot operated compound relief valve.
In sum, pilot operated compound relief valve of the present invention, structure is simple, easy to use, can stablize and realize overflow fast, and offer remote control orifice 8 on the respective side valve body of pilot valve spool front end, remote control orifice 8 controls by pressure regulator valve, can carry out pressure adjusting to relief valve, using effect is better.
More than show and describe basic principle of the present invention, major character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain 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 main valve plug, pilot valve spool, described valve body offer and be equipped with influent stream mouth and go out head piece, main valve plug is provided with in valve body, described main valve plug inside is provided with the main spool spring be connected with valve interior wall, pilot valve spool is provided with in the valve space of main valve plug upper end, described pilot valve spool cylindrical is arranged with the pilot valve spring be connected with valve interior wall, be provided with the through hole that can be communicated with influent stream mouth in the side of main valve plug, described through hole by the runner in valve body and pilot valve valve element position through.
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 the respective side valve body of pilot valve spool front end, offer remote control orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118755.1A CN104948792A (en) | 2014-03-27 | 2014-03-27 | Pilot operated compound relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118755.1A CN104948792A (en) | 2014-03-27 | 2014-03-27 | Pilot operated compound relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104948792A true CN104948792A (en) | 2015-09-30 |
Family
ID=54163698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410118755.1A Pending CN104948792A (en) | 2014-03-27 | 2014-03-27 | Pilot operated compound relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104948792A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591549A (en) * | 2018-06-01 | 2018-09-28 | 江苏安普阀门机械有限公司 | A kind of deep fat overflow valve |
| CN111271477A (en) * | 2020-02-22 | 2020-06-12 | 邵延荣 | Electromagnetic stop safety valve |
| CN111279105A (en) * | 2018-03-16 | 2020-06-12 | Ｋｙｂ株式会社 | Overflow valve |
| CN112032377A (en) * | 2020-08-21 | 2020-12-04 | 浙江大学 | Quick-response pilot operated safety valve and system overpressure quick protection method |
| 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 |
| US11619148B2 (en) | 2018-08-23 | 2023-04-04 | Volvo Truck Corporation | Cylinder valve assembly with valve spring venting arrangement |
-
2014
- 2014-03-27 CN CN201410118755.1A patent/CN104948792A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111279105A (en) * | 2018-03-16 | 2020-06-12 | Ｋｙｂ株式会社 | Overflow valve |
| CN108591549A (en) * | 2018-06-01 | 2018-09-28 | 江苏安普阀门机械有限公司 | A kind of deep fat overflow valve |
| US11619148B2 (en) | 2018-08-23 | 2023-04-04 | Volvo Truck Corporation | Cylinder valve assembly with valve spring venting arrangement |
| CN111271477A (en) * | 2020-02-22 | 2020-06-12 | 邵延荣 | Electromagnetic stop safety valve |
| CN112032377A (en) * | 2020-08-21 | 2020-12-04 | 浙江大学 | Quick-response pilot operated safety valve and system overpressure quick protection method |
| CN112032377B (en) * | 2020-08-21 | 2021-09-14 | 浙江大学 | Quick-response pilot operated safety valve and system overpressure quick protection method |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150930 |