CN201288713Y - Unloading relief valve - Google Patents
Unloading relief valve Download PDFInfo
- Publication number
- CN201288713Y CN201288713Y CN 200820154317 CN200820154317U CN201288713Y CN 201288713 Y CN201288713 Y CN 201288713Y CN 200820154317 CN200820154317 CN 200820154317 CN 200820154317 U CN200820154317 U CN 200820154317U CN 201288713 Y CN201288713 Y CN 201288713Y
- Authority
- CN
- China
- Prior art keywords
- valve
- pilot
- core
- main
- utility
- 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
Links
Images
Landscapes
- Magnetically Actuated Valves (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The utility model relates to the technical field of hydraulic valve, specifically to an unloading overflow valve. The utility model provides a novel unloading overflow valve composed of a pilot valve, a main valve with a main valve core and a check valve. The utility model is characterized in that the pressure regulating valve core of the pilot valve is in arc form. The pressure regulating valve core of the pilot valve and the valve core of the check valve are all in arc form, therefore the snarl generated by the pressure regulating valve core under the original conical surface, the pressure regulating stability of the pilot valve is increased, and the seal property of the valve core of the check valve is enhanced. The main valve core and the main valve housing use plain seal oil structure, thus the open-close performance of the valve port is improved.
Description
Technical field
The utility model relates to the hydrovalve technical field, particularly a kind of unloading overflow valve.
Background technique
In hydraulic system, unloading valve is the relief valve of a band two position two-way valve normally, function is when not off-load, as initialization system (oil pump) principal pressure, (by the conversion of bi-bit bi-pass valve events) direct backspace fuel tank of pressure oil when unloading condition, system pressure is that 0 value is to realize some circuit controls and to improve oil pump life, the minimizing power consumption.In the loop, belong to and entry loop.
Off-load is mainly used in is equipped with in the accumulator moral oil hydraulic circuit, automatically makes the oil hydraulic pump off-load when the accumulator supercharging pressure reaches the setting pressure of valve.The dress one-way valve prevents that the fluid of pressure that has in the accumulator from flowing backwards in having in the valve.Kept system fuel feeding by accumulator this moment and thereby energy-saving effect is received in the pump off-load.When oil liquid pressure in the accumulator was reduced to 85% left and right sides of valve setting pressure, valve carried again again, and oil hydraulic pump recovers to the accumulator topping up.This valve also can be used for the double pump high-low circuit.Two pumps are simultaneously to system's fuel feeding during low pressure, and this valve makes big pump off-load and it and high-pressure section are separated during high pressure.
Unloading valve generally can be divided into direct-acting type and leading type by its structural type and elemental motion mode.This valve is made up of the main valve and the one-way valve of pilot valve, band main valve plug usually.
China Patent No. a kind of preferential unloading valve that has been 00206564.9 patent disclosure, it is by pressure-gradient control valve, relief valve, one-way valve, unloading valve pilot valve and unloading valve main valve are formed, each single valve is organically combined, hydraulic system is simplified greatly, and unloading valve has realized that pressure unloading and on-load pressure are single-point control, in double pump double loop hydraulic system, use control automatically to turn to and to need flow, the output flow of pump can partly or entirely be supplied with hydraulic system of working work, can control interflow or low pressure off-load automatically according to the load of hydraulic system of working simultaneously, have controlled preferably and energy-saving effect.
At present, the adjusting pressuring valve core of existing pilot valve and the spool of one-way valve generally adopt conical surface form, and this often causes descending in working order problems such as vertical bamboo flute cry that adjusting pressuring valve core produces and pressure regulation stability sealability not good, the one-way valve spool be bad; Existing main valve generally adopts sliding valve style and conical surface type, concerning the sliding valve style spool, its valve port position degree requires very strictness and conical surface oil sealing form, then the concentricity of the main valve housing pilot hole and the conical surface also requires extremely strict, the concentricity problem that comprises the main valve plug guide surface and the conical surface can influence directly all that valve port is opened and the performance of oil sealing.
The model utility content
Technical problem to be solved in the utility model is, a kind of unloading overflow valve is provided, and strengthens pilot valve pressure regulation stability, improves the sealability of one-way valve spool.
In order to address the above problem the technical solution of the utility model is such:
A kind of unloading overflow valve is made up of the main valve and the one-way valve of pilot valve, band main valve plug, and the adjusting pressuring valve core that it is characterized in that pilot valve has adopted the form of circular arc.
The adjusting pressuring valve core conical surface of the utility model pilot valve is used the form of circular arc instead, make its oil sealing surface change the line oil sealing into, improved the flow coefficient of flow liquid, eliminated the vertical bamboo flute cry that conical surface form lower valve core produces from the face oil sealing, also improved the sensitivity of adjusting pressuring valve core, strengthened pressure regulation stability and made.Also oversimplified in production technology simultaneously.
In an embodiment, the spool of the utility model check-valve port is used the form of circular arc instead, and the principle basically identical of its principle and pilot valve pressure regulation valve port spool mainly is to have solved part when machining, the decentraction problem that unidirectional poppet valve core and unidirectional valve pocket produce.When flow liquid when P → A switches P → T, after unidirectional poppet valve core closes, because the concentricity problem, add the back pressure in system A chamber, make that unidirectional poppet valve core is stuck, flow liquid is realized going wrong when P → T switches P → A once more.And the generation that the form that adopts ball face sealing has just solved this phenomenon fully.
In an embodiment, the seal form of main valve plug and main valve housing is a plane type oil sealing structure, compares the response mutually of the valve port unlatching of original employing sliding valve style and conical surface type and wants sensitive, also oversimplifies than sliding valve style and conical surface type in production technology simultaneously.
In an embodiment, on pilot valve, also have solenoid valve, can under the switch pressure that pilot valve is set up, realize conversion arbitrarily from P → A or P → T.
The beneficial effects of the utility model are, the spool of the adjusting pressuring valve core of pilot valve and one-way valve has all been adopted the form of circular arc, eliminate original conical surface form downward modulation and pressed the vertical bamboo flute cry of spool generation and strengthened pilot valve pressure regulation stability, improved the sealability of one-way valve spool; Main valve plug and main valve housing have adopted the structure of plane oil sealing, improve rising of valve port and close performance.
Description of drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the utility model unloading overflow valve sectional view;
Fig. 2 is the utility model unloading overflow valve plan view;
Fig. 3 is a charged magnet valve unloading overflow valve sectional view of the present utility model;
Fig. 4 is the utility model pilot valve pressure regulation valve port partial sectional view;
Fig. 5 is a pilot valve conical surface spool pressure regulator valve mouth partial sectional view;
Fig. 6 is among the embodiment, the utility model pilot valve pressure regulation valve port partial sectional view;
Fig. 7 is among the embodiment, the utility model one-way valve valve port partial sectional view;
Fig. 8 is among the embodiment, the utility model main valve plug and main valve housing partial sectional view.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
1 one kinds of unloading overflow valves of embodiment
Referring to Fig. 1,2, a kind of unloading overflow valve is made up of the main valve and the one-way valve of pilot valve, band main valve plug, and wherein pilot valve comprises plug screw 1; Pilot valve body 2; Guide valve seat spool 3; Pilot valve flow controller 4; Guide valve seat 5; Ball valve core 6; Pressure spring chamber 7; Adjustment sleeve 8; Pressure adjusting spring 9; Spring seat 10; Jump ring 11; Packing ring 12; Nut 13; Regulating handle 14; Lock screw 15, one-way valve comprise control oil channel chamber 16; Unidirectional poppet valve core 17; Spring 18; Unidirectional valve pocket 19 and check valve body 29, main valve comprises screw plug 20; Chamber, interior oil extraction road 21; Balance spring 22; Main valve housing 23; Main valve plug 24; Valve body of main valve 25; Main valve plug flow controller 26 and efflux mouthfuls 27.
Referring to Fig. 3, be the charged magnet valve unloading overflow valve of the utility model sectional view, described solenoid valve 28 is arranged on the pilot valve;
Referring to Fig. 4-6, use the adjusting pressuring valve core conical surface instead steel ball, make its oil sealing surface change the line oil sealing into from the face oil sealing, improved the flow coefficient of flow liquid, eliminated the vertical bamboo flute cry that conical surface form lower valve core produces, the sensitivity that has also improved adjusting pressuring valve core has strengthened pressure regulation stability and has made.Also oversimplified in production technology simultaneously.
Referring to Fig. 1,7, in an embodiment, also can use the spool of check-valve port instead ball face sealing simultaneously, the principle basically identical of its principle and pilot valve pressure regulation valve port spool, mainly be to have solved part when machining, the decentraction problem that unidirectional poppet valve core 17 and unidirectional valve pocket 19 produce.When flow liquid when P → A switches P → T, after unidirectional poppet valve core 17 closes, because the concentricity problem, add the back pressure in system A chamber, make that unidirectional poppet valve core 17 is stuck, flow liquid is realized going wrong when P → T switches P → A once more.And the generation that the form that adopts ball face sealing has just solved this phenomenon fully.
Referring to Fig. 1,8, in an embodiment, also can be simultaneously the seal form of main valve plug 24 and main valve housing 23 should be plane type oil sealing structure, compare the response mutually that the valve port of original employing sliding valve style and conical surface type opens and want sensitive.Concerning the sliding valve style spool, its valve port position degree requires very strict; Conical surface oil sealing form, then the concentricity of the main valve housing pilot hole and the conical surface also requires extremely strictness, comprises the concentricity problem of the main valve plug guide surface and the conical surface, all can directly influence the performance of valve port unlatching and oil sealing.And adopt plane type oil sealing structure, and solved the above problem that both easily produce fully, also oversimplify in production technology simultaneously than sliding valve style and conical surface type.
The workflow of this unloading overflow valve is as follows:
1, the flow liquid of pump switches to P → T from P → A.
The liquid stream of pump output flows to A chamber P → A oil transportation through unidirectional poppet valve core 17 and gives system.The pressure of hydraulic fluid port A enters pilot-actuated valve by control oil channel chamber 16 and flows on the guide valve seat spool 3.The pressure of hydraulic fluid port P flows to the epicoele of main valve plug 24 by main valve plug flow controller (26) simultaneously, and acts on the ball valve core 6 through pilot valve flow controller 4 again.In case when the A mouth pressure reached the pressure unloading of pilot valve 2 setting, ball valve core 6 overcame pressure adjusting spring 9 and leaves guide valve seat 5, fluid is at this moment through main valve plug flow controller 26 and pilot valve flow controller 4 feed pressure spring chambers 7.The fluid in pressure spring chamber can be arranged in realize in chamber, interior oil extraction road 21, perhaps effluxes direct oil sump tank through effluxing mouthful 27 realizations.Because main valve plug flow controller 26 and pilot valve flow controller 4 allow main valve plug 24 upper and lower cavities have a pressure drop, thereby make main valve plug 24 leave the passage that main valve housing 23 is opened P to T.Unidirectional poppet valve core 17 is closed the hydraulic fluid port of A to P this moment.Ball valve core 6 this moment also with enter pilot-actuated valve through control oil channel chamber 16 and flow on the guide valve seat spool 3 pressure and be held open.So just finished flow liquid and switched to P → T from P → A.
2, the flow liquid of pump switches P → A from P → T.
The area of guide valve seat spool 3 is than the useful area that acts on guide valve seat 5 upper ball valve cores 6 big by 10% (or optional 17%).Thereby, act on effective force on the guide valve seat spool 6 than the effective force big 10% or 17% that acts on the ball valve core 6.When the system pressure drop-out value equal conversion than the time, pressure adjusting spring 9 is pushed against ball valve core 6 on the guide valve seat 5, act on pressure and balance spring 22 synergisms of main valve plug 24 spring-loaded sides this moment, closes main valve plug 24, the asphalt channel of partition P to T.The flow liquid of pump is once through unidirectional poppet valve core 17 input hydraulic pressure systems.Just the flow liquid of realizing pump switches P → A from P → T.
2 one kinds of charged magnet valve unloading overflow valves of embodiment
A kind of charged magnet valve unloading overflow valve is made up of the main valve and the one-way valve of pilot valve, solenoid valve, band main valve plug, and wherein pilot valve comprises plug screw 1; Pilot valve body 2; Guide valve seat spool 3; Pilot valve flow controller 4; Guide valve seat 5; Ball valve core 6; Pressure spring chamber 7; Adjustment sleeve 8; Pressure adjusting spring 9; Spring seat 10; Jump ring 11; Packing ring 12; Nut 13; Regulating handle 14; Lock screw 15, one-way valve comprise control oil channel chamber 16; Unidirectional poppet valve core 17; Spring 18; Unidirectional valve pocket 19 and check valve body 29, main valve comprises screw plug 20; Chamber, interior oil extraction road 21; Balance spring 22; Main valve housing 23; Main valve plug 24; Valve body of main valve 25; Main valve plug flow controller 26 and efflux mouthfuls 27 has individual solenoid valve 28 on the pilot valve 2.
The key property of this valve is identical with unloading overflow valve described in the embodiment 1, and individual solenoid valve 28 is just arranged on pilot valve 2, can realize the conversion from P → A or P → T under the switch pressure that pilot valve is set up arbitrarily.
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; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1, unloading overflow valve is made up of the main valve and the one-way valve of pilot valve, band main valve plug, it is characterized in that the adjusting pressuring valve core of described pilot valve is the form of circular arc.
2, unloading overflow valve according to claim 1 is characterized in that, the adjusting pressuring valve core of described pilot valve is the ball valve core.
3, unloading overflow valve according to claim 1 is characterized in that, the spool of described one-way valve is the form of circular arc.
4, unloading overflow valve according to claim 1 is characterized in that, the seal form of described main valve plug and main valve housing is a plane type oil sealing structure.
5, unloading overflow valve according to claim 1 is characterized in that, described unloading overflow valve also has solenoid valve, and described solenoid valve is arranged on the pilot valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820154317 CN201288713Y (en) | 2008-10-22 | 2008-10-22 | Unloading relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820154317 CN201288713Y (en) | 2008-10-22 | 2008-10-22 | Unloading relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201288713Y true CN201288713Y (en) | 2009-08-12 |
Family
ID=40980395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200820154317 Expired - Fee Related CN201288713Y (en) | 2008-10-22 | 2008-10-22 | Unloading relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201288713Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207112A (en) * | 2011-06-13 | 2011-10-05 | 江铃汽车股份有限公司 | Double electronic control pilot type electromagnetic relief valve |
| CN102444159A (en) * | 2011-09-22 | 2012-05-09 | 三一重机有限公司 | Method for protecting travel motor in extremely cold area |
| CN102575759A (en) * | 2009-10-19 | 2012-07-11 | 贺德克技术有限公司 | Device for releasing, in a pulsed manner, an amount of fluid that can be stored in an accumulator housing |
| CN103122881A (en) * | 2011-11-18 | 2013-05-29 | 广西柳工机械股份有限公司 | Pilot reducing valve |
| CN104100589A (en) * | 2014-07-04 | 2014-10-15 | 宁波雪隆王液压科技有限公司 | Fast multi-direction multifunctional liquid control valve |
| CN104864137A (en) * | 2015-05-20 | 2015-08-26 | 安徽理工大学 | Pilot-operated type water pressure overflow valve |
| CN105570501A (en) * | 2016-02-02 | 2016-05-11 | 石特阀门股份有限公司 | Novel gas pressure stabilizing and unloading valve |
| CN107489799A (en) * | 2017-08-31 | 2017-12-19 | 上海立新液压有限公司 | A kind of efficient precursor overflow valve |
| CN108518374A (en) * | 2018-06-22 | 2018-09-11 | 江苏恒立液压科技有限公司 | Unloading electromagnetic valve |
-
2008
- 2008-10-22 CN CN 200820154317 patent/CN201288713Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575759A (en) * | 2009-10-19 | 2012-07-11 | 贺德克技术有限公司 | Device for releasing, in a pulsed manner, an amount of fluid that can be stored in an accumulator housing |
| CN102207112A (en) * | 2011-06-13 | 2011-10-05 | 江铃汽车股份有限公司 | Double electronic control pilot type electromagnetic relief valve |
| CN102444159A (en) * | 2011-09-22 | 2012-05-09 | 三一重机有限公司 | Method for protecting travel motor in extremely cold area |
| CN102444159B (en) * | 2011-09-22 | 2013-08-14 | 三一重机有限公司 | Method for protecting travel motor in extremely cold area |
| CN103122881B (en) * | 2011-11-18 | 2016-01-27 | 广西柳工机械股份有限公司 | Guide's reduction valve |
| CN103122881A (en) * | 2011-11-18 | 2013-05-29 | 广西柳工机械股份有限公司 | Pilot reducing valve |
| CN104100589B (en) * | 2014-07-04 | 2016-06-08 | 宁波江东晟创工业产品设计有限公司 | A kind of multidirectional and multifunctional pilot operated valve device fast |
| CN104100589A (en) * | 2014-07-04 | 2014-10-15 | 宁波雪隆王液压科技有限公司 | Fast multi-direction multifunctional liquid control valve |
| CN104864137A (en) * | 2015-05-20 | 2015-08-26 | 安徽理工大学 | Pilot-operated type water pressure overflow valve |
| CN104864137B (en) * | 2015-05-20 | 2017-11-14 | 安徽理工大学 | Leading type water pressure overflow valve |
| CN105570501A (en) * | 2016-02-02 | 2016-05-11 | 石特阀门股份有限公司 | Novel gas pressure stabilizing and unloading valve |
| CN105570501B (en) * | 2016-02-02 | 2018-07-06 | 石特阀门股份有限公司 | A kind of new gas voltage stabilizing unloading valve |
| CN107489799A (en) * | 2017-08-31 | 2017-12-19 | 上海立新液压有限公司 | A kind of efficient precursor overflow valve |
| CN107489799B (en) * | 2017-08-31 | 2023-11-03 | 上海立新液压有限公司 | Efficient guide overflow valve |
| CN108518374A (en) * | 2018-06-22 | 2018-09-11 | 江苏恒立液压科技有限公司 | Unloading electromagnetic valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201288713Y (en) | Unloading relief valve | |
| CN101469725A (en) | Piloted unload valve | |
| CN202673874U (en) | Constant-pressure variable control system of load sensitive hydraulic pump | |
| CN205401290U (en) | Energy storage ware return circuit is with guide's off -load overflow valve | |
| CN201180705Y (en) | High-pressure high-volume hydraulic loop device | |
| CN204345010U (en) | Guide's overflow-type reduction valve | |
| CN208185101U (en) | A kind of big flow single channel double overflow three-way pressure compensating device | |
| CN104265716A (en) | Ultrahigh pressure pilot operated relief valve | |
| CN106783422A (en) | Hydraulic control valve and hydraulic actuating mechanism, breaker | |
| CN204344557U (en) | A kind of ultrahigh pressure pilot operated compound relief valve | |
| CN108223493A (en) | A kind of variable balanced valve of pilot ratio | |
| CN201851726U (en) | Pilot overflow valve | |
| CN105545850B (en) | A kind of load-sensitive duty valve and its banked direction control valves, hydraulic system, mini-excavator | |
| CN101761491B (en) | Multi-functional control valve of water pump | |
| CN201461568U (en) | Full-thread cartridge high-flow digital hydraulic speed control valve | |
| CN205047561U (en) | One -way buffering overflow valve and closed hydraulic pump | |
| CN203257776U (en) | Pilot-operated type electric-hydraulic proportional overflow valve based on plug-in mounting structure | |
| CN202187970U (en) | Proportional control multi-way valve for integration of load sensing shunting and converging system and integrally cast runner | |
| CN204083373U (en) | A kind of multi-way valve with off-load protection | |
| CN209012150U (en) | Load sensitive control system | |
| CN207960641U (en) | Electro-hydraulic reversing valve group for hydraulic support | |
| CN203796643U (en) | Adjustable throttling hydraulic lock of coal mining machine | |
| CN206458833U (en) | A kind of electromagnetic pilot-operated hydraulic two-way plug-in installed | |
| CN201359113Y (en) | Large-caliber two-position three-way reversing solenoid valve | |
| CN201065863Y (en) | Composite control valve for proportional pressure and flow |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 Termination date: 20161022 |