CN101469725A - Piloted unload valve - Google Patents
Piloted unload valve Download PDFInfo
- Publication number
- CN101469725A CN101469725A CN 200710173073 CN200710173073A CN101469725A CN 101469725 A CN101469725 A CN 101469725A CN 200710173073 CN200710173073 CN 200710173073 CN 200710173073 A CN200710173073 A CN 200710173073A CN 101469725 A CN101469725 A CN 101469725A
- Authority
- CN
- China
- Prior art keywords
- valve
- core
- main
- pressure
- valve core
- 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
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to the technical field of hydraulic valve, which particularly relates to a pilot operated unloading valve. The present invention provides a new pilot operated unloading valve which is composed by a pilot operated valve, a main valve with main valve core and a one-way valve, characterized in that the pressure regulator valve core of the pilot operated valve adopts circular arc; the pressure regulator valve core of the pilot operated valve and the valve core of the one-way valve adopt circular arc which dispels yelling generated by the pressure regulator valve core under form of original pyramidal face, enhances pressure regulating stability of the pilot operated valve, and improves sealing property of the one-way valve core; the main valve core and the main valve jacket adopt flat oil sealing structure which improves open and close performance of the valve port.
Description
Technical field
The present invention relates to the hydrovalve technical field, be specifically related to a kind of piloted unload 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 the O value is to realize some circuit controls and to improve oil pump life, the minimizing power consumption. in the loop, belongs 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.
Chinese patent 00206564.9 discloses a kind of preferential unloading valve, 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.
Summary of the invention
The object of the invention provides a kind of novel piloted unload valve.
A kind of piloted unload 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 pilot valve of the present invention 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 check-valve port of the present invention 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 present invention has all adopted the form of circular arc with the spool of the adjusting pressuring valve core of pilot valve and one-way valve, has eliminated original conical surface form downward modulation and has pressed the vertical bamboo flute cry that spool produces and strengthened pilot valve pressure regulation stability, has 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
Fig. 1 is a piloted unload valve sectional view of the present invention.
Fig. 2 is a piloted unload valve plan view of the present invention.
Fig. 3 is a charged magnet valve piloted unload valve sectional view of the present invention.
Fig. 4 is a pilot valve pressure regulation valve port partial sectional view of the present invention.
Fig. 5 is a pilot valve conical surface spool pressure regulator valve mouth partial sectional view.
Fig. 6 is among the embodiment, pilot valve pressure regulation valve port partial sectional view of the present invention.
Fig. 7 is among the embodiment, one-way valve valve port partial sectional view of the present invention.
Fig. 8 is among the embodiment, main valve plug of the present invention and main valve housing partial sectional view.
Embodiment
Below in conjunction with specific embodiment, further illustrate the present invention.Should be understood that these embodiments only to be used to the present invention is described and be not used in and limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example, usually according to normal condition, or the condition of advising according to manufacturer.Ratio and percentage are based on weight, unless stated otherwise.
1 one kinds of piloted unload valves of embodiment
Referring to Fig. 1,2, a kind of piloted unload 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. 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 piloted unload 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 piloted unload valves of embodiment
A kind of charged magnet valve piloted unload 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 piloted unload 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.
Scope of the present invention is not subjected to the restriction of described specific embodiments, and described embodiment is only desired also to comprise the method and the component of functional equivalent in the scope of the invention as the single example of illustrating All aspects of of the present invention.In fact, except content as herein described, those skilled in the art can easily grasp multiple improvement of the present invention with reference to above description and accompanying drawing.Described improvement also falls within the scope of appended claims.
Claims (5)
1. a piloted unload 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 its pilot valve is the form of circular arc.
2. piloted unload valve according to claim 1, the adjusting pressuring valve core that it is characterized in that described pilot valve is the ball valve heart.
3. piloted unload valve according to claim 1, the spool that it is characterized in that described one-way valve is the form of circular arc.
4. piloted unload valve according to claim 1, the seal form that it is characterized in that described main valve plug and main valve housing are plane type oil sealing structure.
5. piloted unload valve according to claim 1 is characterized in that also having solenoid valve, and this solenoid valve is on pilot valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710173073 CN101469725A (en) | 2007-12-26 | 2007-12-26 | Piloted unload valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710173073 CN101469725A (en) | 2007-12-26 | 2007-12-26 | Piloted unload valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101469725A true CN101469725A (en) | 2009-07-01 |
Family
ID=40827466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710173073 Pending CN101469725A (en) | 2007-12-26 | 2007-12-26 | Piloted unload valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101469725A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678645A (en) * | 2012-05-31 | 2012-09-19 | 常德中联重科液压有限公司 | Direct-acting overflow valve, direct-acting overflow valve group and hydraulic overflow loop |
| CN103122881A (en) * | 2011-11-18 | 2013-05-29 | 广西柳工机械股份有限公司 | Pilot reducing valve |
| CN104314805A (en) * | 2014-09-22 | 2015-01-28 | 刘国利 | Mine pump automatic unloading hydraulic control valve assembly |
| CN104989690A (en) * | 2015-06-29 | 2015-10-21 | 象山盛韵汽配科技有限公司 | Overload relief valve |
| CN105332966A (en) * | 2015-12-09 | 2016-02-17 | 东北石油大学 | High pressure unloading valve for hydraulic driving hydrostatic test |
| 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 |
| CN106837909A (en) * | 2017-03-30 | 2017-06-13 | 苏州日川精密仪器有限公司 | Easy adjustable type hydraulic valve assembly |
| CN108005984A (en) * | 2017-12-01 | 2018-05-08 | 宁波文泽机电技术开发有限公司 | A kind of guide type electromagnetic ball valve |
| CN108087364A (en) * | 2017-12-19 | 2018-05-29 | 番禺珠江钢管（珠海）有限公司 | A kind of double pressure unloading valves |
| CN108916151A (en) * | 2018-09-27 | 2018-11-30 | 邵延荣 | A kind of plug-in unloading valve |
| CN109026872A (en) * | 2018-09-27 | 2018-12-18 | 邵延荣 | A kind of inserted valve |
| CN111005906A (en) * | 2019-12-31 | 2020-04-14 | 华中科技大学无锡研究院 | Ultrahigh-pressure large-flow high-water-base unloading valve |
| CN113417900A (en) * | 2021-06-16 | 2021-09-21 | 中国矿业大学 | Integrated high-pressure large-flow proportional overflow type unloading valve |
-
2007
- 2007-12-26 CN CN 200710173073 patent/CN101469725A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122881A (en) * | 2011-11-18 | 2013-05-29 | 广西柳工机械股份有限公司 | Pilot reducing valve |
| CN103122881B (en) * | 2011-11-18 | 2016-01-27 | 广西柳工机械股份有限公司 | Guide's reduction valve |
| CN102678645B (en) * | 2012-05-31 | 2014-10-29 | 常德中联重科液压有限公司 | Direct-acting overflow valve, direct-acting overflow valve group and hydraulic overflow loop |
| CN102678645A (en) * | 2012-05-31 | 2012-09-19 | 常德中联重科液压有限公司 | Direct-acting overflow valve, direct-acting overflow valve group and hydraulic overflow loop |
| CN104314805A (en) * | 2014-09-22 | 2015-01-28 | 刘国利 | Mine pump automatic unloading hydraulic control valve assembly |
| CN104989690A (en) * | 2015-06-29 | 2015-10-21 | 象山盛韵汽配科技有限公司 | Overload relief valve |
| CN105332966A (en) * | 2015-12-09 | 2016-02-17 | 东北石油大学 | High pressure unloading valve for hydraulic driving hydrostatic test |
| 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 |
| CN106837909A (en) * | 2017-03-30 | 2017-06-13 | 苏州日川精密仪器有限公司 | Easy adjustable type hydraulic valve assembly |
| CN108005984B (en) * | 2017-12-01 | 2019-11-15 | 玉环华洲机械股份有限公司 | A kind of guide type electromagnetic ball valve |
| CN108005984A (en) * | 2017-12-01 | 2018-05-08 | 宁波文泽机电技术开发有限公司 | A kind of guide type electromagnetic ball valve |
| CN108087364A (en) * | 2017-12-19 | 2018-05-29 | 番禺珠江钢管（珠海）有限公司 | A kind of double pressure unloading valves |
| CN108087364B (en) * | 2017-12-19 | 2024-03-19 | 番禺珠江钢管（珠海）有限公司 | Double-pressure unloading valve |
| CN109026872A (en) * | 2018-09-27 | 2018-12-18 | 邵延荣 | A kind of inserted valve |
| CN108916151A (en) * | 2018-09-27 | 2018-11-30 | 邵延荣 | A kind of plug-in unloading valve |
| CN108916151B (en) * | 2018-09-27 | 2020-06-26 | 林忠达 | Cartridge formula off-load valve |
| CN111005906A (en) * | 2019-12-31 | 2020-04-14 | 华中科技大学无锡研究院 | Ultrahigh-pressure large-flow high-water-base unloading valve |
| CN113417900A (en) * | 2021-06-16 | 2021-09-21 | 中国矿业大学 | Integrated high-pressure large-flow proportional overflow type unloading valve |
| CN113417900B (en) * | 2021-06-16 | 2022-04-01 | 中国矿业大学 | Integrated high-pressure large-flow proportional overflow type unloading valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101469725A (en) | Piloted unload valve | |
| CN201288713Y (en) | Unloading relief valve | |
| CN201786795U (en) | Hydraulic pressure stop valve | |
| CN202673874U (en) | Constant-pressure variable control system of load sensitive hydraulic pump | |
| CN201180705Y (en) | High-pressure high-volume hydraulic loop device | |
| CN204345010U (en) | Guide's overflow-type reduction valve | |
| CN104265716B (en) | A kind of super-pressure pilot operated compound relief valve | |
| CN105545850B (en) | A kind of load-sensitive duty valve and its banked direction control valves, hydraulic system, mini-excavator | |
| CN204344557U (en) | A kind of ultrahigh pressure pilot operated compound relief valve | |
| CN106783422A (en) | Hydraulic control valve and hydraulic actuating mechanism, breaker | |
| CN201851726U (en) | Pilot overflow valve | |
| CN108223493A (en) | A kind of variable balanced valve of pilot ratio | |
| CN103573753B (en) | Transient test loop for hydraulic valve | |
| CN107883028B (en) | The ratio one-way flow valves of double-direction control | |
| CN203823173U (en) | Pilot relief valve | |
| CN209012150U (en) | Load sensitive control system | |
| CN106050779A (en) | Multi-way valve of forklift | |
| CN207879746U (en) | A kind of double pressure unloading valves | |
| CN101260845A (en) | One-valve multiple-door large flow single-stage pressure reducing regulator | |
| CN200975530Y (en) | Direct-action proportional relief pressure valve | |
| CN201065863Y (en) | Composite control valve for proportional pressure and flow | |
| CN2416266Y (en) | Priority unloading valve | |
| CN207715860U (en) | A kind of pressure reduction structure with check-valves | |
| CN103047212B (en) | Hydraulic control reversing valve | |
| CN208585232U (en) | A kind of trailer relay valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090701 |