CN203614492U - Pilot type overflow valve - Google Patents
Pilot type overflow valve Download PDFInfo
- Publication number
- CN203614492U CN203614492U CN201320674822.9U CN201320674822U CN203614492U CN 203614492 U CN203614492 U CN 203614492U CN 201320674822 U CN201320674822 U CN 201320674822U CN 203614492 U CN203614492 U CN 203614492U
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- pressure
- valve
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- pilot
- high pressure
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Abstract
The utility model discloses a pilot type overflow valve, which comprises a valve body, a low-pressure pilot valve, a high-pressure pilot valve and a main valve, wherein the low-pressure pilot valve, the high-pressure pilot valve and the main valve are arranged inside the valve body, and an oil inlet passage, an oil outlet passage and an oil return opening passage are arranged on the valve body. The low-pressure pilot valve comprises a low-pressure valve core, a fine spring and a low-pressure regulating device, and the high-pressure pilot valve comprises a high-pressure valve core, a high-pressure spring and a high-pressure regulating device. The high-pressure pilot valve and the low-pressure pilot valve are matched to be used, so the overflow pressure regulating range of the pilot type overflow valve is enlarged, and meanwhile, the regulation becomes preciser.
Description
Technical field
The utility model relates to flow control field, relates in particular to a kind of pilot operated compound relief valve.
Background technique
Relief valve is a kind of pressure control valve of extensive use in hydraulic transmission, and its effect is by high pressure, and the liquid rheology of large flow is low pressure, and the liquid stream of small flow plays the effect of overflow and safety protection in hydraulic equipment.Relief valve is to regulate its oil pressure relief by pressure adjusting spring, and in industrial production, due to the demand difference of different places to fluid flow size, people often will use the relief valve of different pressures model.Traditional relief valve pressure regulation range is little, can not meet the application of different places on a large scale.The relief valve that some pressure regulation ranges are large can not be realized fine adjustment at pressure hour.
Model utility content
In order to solve above-mentioned traditional relief valve in the defect in pressure regulation range, the utility model provide a kind of pressure regulation range large, regulate pilot operated compound relief valve accurate, simple in structure.
The utility model is realized the technological scheme that above-mentioned technique effect adopts:
A kind of pilot operated compound relief valve, comprises valve body and the low-pressure pilot valve, high pressure pilot valve and the main valve that are arranged on described valve inner, is provided with filler opening passage, oil outlet passage and return opening passage on valve body.
Preferably, above-mentioned a kind of pilot operated compound relief valve, wherein low-pressure pilot valve low pressure spool, delicate springs and low-pressure adjusting regulating device; High pressure pilot valve comprises high pressure spool, high pressure spring and high pressure governor.
Preferably, above-mentioned a kind of relief valve, main valve comprises that inside is provided with the main valve plug of backflow through hole and is arranged on the piston on main valve plug, and piston is provided with damping through hole, and valve body is divided into the first hydraulic pressure district and the second hydraulic pressure district by described main valve.
Preferably, above-mentioned a kind of pilot operated compound relief valve, is characterized in that being equipped with pressure dial plate on described low-pressure adjusting regulating device and described high pressure governor.
The beneficial effects of the utility model are: compared with prior art; the utility model has adopted two pilot valves, and low-pressure pilot valve and high pressure pilot valve, when entering the less occasion of pressure at fluid while using; can select the work of low-pressure pilot valve, high pressure pilot valve is closed; When entering the larger occasion of pressure at fluid while using, can select the work of high pressure pilot valve.In low-pressure pilot valve, be provided with delicate springs, be provided with high pressure spring in high pressure pilot valve, this design makes the utility model pressure regulation range become large, can meet the use of different occasions,
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: 1 is valve body; 2 is low-pressure pilot valve, and 21 is low pressure spool, and 22 is delicate springs, and 23 is low-pressure adjusting regulating device, 231 is pressure dial plate, and 3 is high pressure pilot valve, 31 high pressure spools, 32 is high pressure spring, and 33 is high pressure governor, and 331 is pressure dial plate, 4 is main valve, and 41 is main valve plug, and 42 is piston, 43 is damping through hole, and 5 is filler opening passage, and 6 is oil outlet passage, 7 is return opening passage, and 8 is the first hydraulic pressure district, and 9 is the second hydraulic pressure district.
Embodiment
For making that the utility model is had to further understanding, below with reference to Figure of description and specific embodiment, the utility model is described in further detail:
Shown in Fig. 1: a kind of pilot operated compound relief valve, comprise valve body 1 and the low-pressure pilot valve 2, high pressure pilot valve 3 and the main valve 4 that are arranged on valve inner, on valve body 1, be also provided with filler opening passage 5, oil outlet passage 6 and return opening passage 7.Wherein low-pressure pilot valve 2 comprises low pressure spool 21, delicate springs 22 and low-pressure adjusting regulating device 23; High pressure pilot valve 3 comprises high pressure spool 31, high pressure spring 32 and high pressure governor 33.Main valve 4 comprises that inside is provided with the main valve plug 41 of backflow through hole and is arranged on the piston 42 on main valve plug, is provided with a damping through hole 43 on piston 42, and valve body is divided into the first hydraulic pressure district 8 and the second hydraulic pressure district 9 by main valve.
When at fluid flow hour, need to carry out meticulous control to fluid, now close high pressure pilot valve 3, only allow low-pressure pilot valve work 2, can set the pressure of relief valve by low-pressure adjusting regulating device 23.
Fluid is from logical 5 roads of filler opening enter, first arrive the first hydraulic pressure district 8, and enter into the second hydraulic pressure district 9 by the damping through hole 43 on piston, now fluid is to 21 1 of low pressure spools on low-pressure pilot valve 2 pressure to the right, and low pressure spool 21 is also subject to delicate springs 22 pressure left simultaneously.In the time that the oil liquid pressure entering from filler opening passage 5 is less than setting oil pressure relief, delicate springs 22 is greater than the pressure of fluid to low pressure spool 21 to the pressure of low pressure spool 21, and now valve keeps closing, and fluid is directly drained from oil outlet passage 6.In the time that the oil liquid pressure entering from filler opening passage 5 is greater than setting oil pressure relief, delicate springs 22 is less than the pressure of fluid to low pressure spool 21 to the pressure of low pressure spool 21, now low pressure spool 21 moves right, valve open, the fluid in the second hydraulic pressure district 9, through Low pressure valve, flow in return opening passage 7 by the through hole in the middle of main valve.
Along with the backflow of fluid in the second hydraulic pressure district 9, the pressure in the second liquid hydraulic pressure district 9 slowly reduces, pressure is step-down slowly, now because fluid in filler opening passage 5 is inputted always, in the first hydraulic pressure district 8, pressure reduces amplitude lower than the second hydraulic pressure district 9, so the first hydraulic pressure district 8 upwards pressure and is greater than the second hydraulic pressure district 9 to the downward pressure of piston to piston, after two poor changes of areal pressure are large, main valve 4 moves up, main valve valve open, also moment flow in return opening passage 7 fluid in the first hydraulic pressure district 8, pressure in the first hydraulic pressure district 8 also decreases, under the effect of valve core of main valve medi-spring, move down, and then close main valve valve, inlet pressure is got back to setting value once, so circulation, pressure in valve body is remained on below the safety value of setting always.
In like manner, when larger at fluid flow, while not needing fluid to carry out meticulous control, close low-pressure pilot valve 2, only allow high pressure pilot valve 3 work, can set the oil pressure relief of relief valve by the high pressure governor of high pressure pilot valve 3 33, high pressure pilot valve is also so controlled the opening and closing of high pressure spool 31, and then the pressure of fluid in whole oil circuit is remained on below safety value always.
In the utility model, on low-pressure adjusting regulating device 23 and described high pressure governor 33, be equipped with pressure dial plate 331, by the cooperation of the reading on pressure dial plate 331 and regulator, can the be convenient sensitive oil pressure relief that arranges.
The utility model adopts the design of two pilot valves, and low-pressure pilot and high pressure pilot valve matching coordinative make pressure regulation range become large, can meet the use of different occasions, have the great significance for popularization.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what in above-described embodiment and specification, describe is principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications; these changes and improvements all fall in claimed scope of the present utility model, and the protection domain that the utility model requires is defined by appending claims and equivalent thereof.
Claims (4)
1. a pilot operated compound relief valve, is characterized in that: comprise valve body and the low-pressure pilot valve, high pressure pilot valve and the main valve that are arranged on described valve inner, described valve body is provided with filler opening passage, oil outlet passage and return opening passage.
2. a kind of pilot operated compound relief valve according to claim 1, is characterized in that: described low-pressure pilot valve comprises low pressure spool, delicate springs and low-pressure adjusting regulating device; Described high pressure pilot valve comprises high pressure spool, high pressure spring and high pressure governor.
3. a kind of pilot operated compound relief valve according to claim 1, it is characterized in that: described main valve comprises that inside is provided with the main valve plug of backflow through hole and is arranged on the piston on main valve plug, described piston is provided with damping through hole, and valve body is divided into the first hydraulic pressure district and the second hydraulic pressure district by described main valve.
4. a kind of pilot operated compound relief valve according to claim 2, is characterized in that: on described low-pressure adjusting regulating device and described high pressure governor, be equipped with pressure dial plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674822.9U CN203614492U (en) | 2013-10-28 | 2013-10-28 | Pilot type overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674822.9U CN203614492U (en) | 2013-10-28 | 2013-10-28 | Pilot type overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614492U true CN203614492U (en) | 2014-05-28 |
Family
ID=50767141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320674822.9U Expired - Fee Related CN203614492U (en) | 2013-10-28 | 2013-10-28 | Pilot type overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614492U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100588A (en) * | 2014-06-13 | 2014-10-15 | 苏州固基电子科技有限公司 | Sequence valve for medium-and-high-pressure system |
| CN104776255A (en) * | 2015-03-30 | 2015-07-15 | 苏州固基电子科技有限公司 | Pressure valve |
| CN108252974A (en) * | 2018-01-23 | 2018-07-06 | 宁波文泽机电技术开发有限公司 | A kind of compact rotary buffering valve |
| CN109323009A (en) * | 2018-12-06 | 2019-02-12 | 贵州大学 | It is a kind of facilitate maintenance and can noise abatement fork truck system precursor overflow valve |
| CN112112853A (en) * | 2020-09-28 | 2020-12-22 | 东阳鸿松机械科技有限公司 | Three-position five-way hydraulic reversing valve with overflow protection function |
| 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 |
-
2013
- 2013-10-28 CN CN201320674822.9U patent/CN203614492U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100588A (en) * | 2014-06-13 | 2014-10-15 | 苏州固基电子科技有限公司 | Sequence valve for medium-and-high-pressure system |
| CN104776255A (en) * | 2015-03-30 | 2015-07-15 | 苏州固基电子科技有限公司 | Pressure valve |
| CN108252974A (en) * | 2018-01-23 | 2018-07-06 | 宁波文泽机电技术开发有限公司 | A kind of compact rotary buffering valve |
| CN108252974B (en) * | 2018-01-23 | 2019-10-22 | 江苏桑力太阳能产业有限公司 | A kind of compact rotary buffering valve |
| CN109323009A (en) * | 2018-12-06 | 2019-02-12 | 贵州大学 | It is a kind of facilitate maintenance and can noise abatement fork truck system precursor overflow valve |
| CN112112853A (en) * | 2020-09-28 | 2020-12-22 | 东阳鸿松机械科技有限公司 | Three-position five-way hydraulic reversing valve with overflow protection function |
| CN112112853B (en) * | 2020-09-28 | 2021-05-18 | 江苏军源装备制造有限公司 | Three-position five-way hydraulic reversing valve with overflow protection function |
| 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 |
|---|---|---|---|
| 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: 20140528 Termination date: 20151028 |
|
| EXPY | Termination of patent right or utility model |