CN102734244A - Priority valve of hydraulic excavator, using method and excavator - Google Patents
Priority valve of hydraulic excavator, using method and excavator Download PDFInfo
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- CN102734244A CN102734244A CN2012102148644A CN201210214864A CN102734244A CN 102734244 A CN102734244 A CN 102734244A CN 2012102148644 A CN2012102148644 A CN 2012102148644A CN 201210214864 A CN201210214864 A CN 201210214864A CN 102734244 A CN102734244 A CN 102734244A
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- hydraulic shovel
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Abstract
The invention discloses a priority valve of a hydraulic excavator, a using method and an excavator, and belongs to the field of hydraulic valves. The priority valve particularly comprises a valve body, wherein an output opening 1, a pressure relief opening 2, a first input opening 3 and a second input opening 4 are formed in the valve body; the first input opening 3 is connected with a first pressure detecting component; connection and disconnection of the second input opening 4 and the output opening 1 are controlled by a spool connected with the first pressure detecting component; and the priority valve also comprises a second pressure detecting component. According to the technical scheme, the priority valve has the advantages that priority time between composite actions can be quantitatively regulated, and the priority valve functions as long as the priority pressure of a priority action is greater than a first pressure preset value; priority pressure which pushes the spool of a second action control valve to move is quantitatively changed along the priority pressure of the priority action; and the priority pressure of a second action cannot be reduced without limitation, and the minimum value of the priority pressure can be set through a spring.
Description
Technical field
The present invention relates to a kind of hydraulic valve, especially a kind of hydraulic shovel pressure-gradient control valve and method for using and excavator.
Background technique
Excavator is claimed excavation machinery again, is to excavate with scraper bowl to be higher or lower than the material that holds machine side, and the haulage vehicle or unload the earth moving machinery to stocking yard of packing into.Along with the extensive development of infrastructure, excavator has been widely used in engineering fields such as building, water conservancy.Excavator work the time is to accomplish excavation, different operation such as smooth through cooperatively interacting of swing arm, dipper, scraper bowl and solid of rotation.The user is except improving constantly the excavator performance requirement, to the also raising day by day of operating characteristics requirement of complete machine.Excavator often needs to carry out composite move when work; The situation of the little or attonity of movement range in two actions that in the composite move implementation, be prone to take place to carry out simultaneously; Have a strong impact on the working efficiency of excavator, possibly cause potential safety hazard when serious.
Existing excavator through improving the main valve plug throttling groove, improves the preferential loop of valve class usually, reaches relative priority effect between the action, and the mode that perhaps between two action control valves of needs realization relative priority, connects pressure-gradient control valve realizes the relative priority effect.But through improving the main valve plug throttling groove, improve the preferential loop of valve class, reaching between the action relative priority effect need carry out bigger change to excavator main valve and oil circuit, and control is complicated, is difficult to realization.And the preferential starting point of existing pressure-gradient control valve, preferential time and pilot pressure are all uncontrollable, and its practicability is had a greatly reduced quality.
Summary of the invention
The problems referred to above that occur when carrying out composite move to existing excavator provide a kind of hydraulic shovel pressure-gradient control valve and method for using and excavator that is intended to realize controlling guide's starting point at present.
Concrete technological scheme is following:
A kind of hydraulic shovel pressure-gradient control valve comprises valve body, and wherein, said valve body is provided with delivery outlet 1, pressure relief opening 2, first inlet opening 3 and second inlet opening 4;
Said first inlet opening 3 is connected with first pressure detecting part, and whether said first pressure detecting part reaches the first pressure predetermined value in order to the incoming pressure that detects said first inlet opening 3;
Said second inlet opening 4 control through the spool that is connected with said first pressure detecting part and said delivery outlet 1 between break-make; The incoming pressure of said first pressure detecting part in said first inlet opening 3 makes said spool be in when not reaching the said first pressure predetermined value can not closing state, and the incoming pressure in said first inlet opening 3 makes said spool be in closable state when reaching the said first pressure predetermined value;
Also comprise second pressure detecting part; When the incoming pressure that said second pressure detecting part is used to said second inlet opening 4 reaches the second pressure predetermined value, increase with the incoming pressure of said second inlet opening 4 aperture that reduces said spool until close fully and with the incoming pressure of said second inlet opening 4 reduce and the aperture that increases said spool until opening fully.
Preferably, said first pressure detecting part mainly moves first poppet valve core 31 and first elastic member 32 forms by changing with the incoming pressure of said first inlet opening 3;
Said spool mainly changes second poppet valve core 41 that moves by the incoming pressure with said second inlet opening 4 and forms;
Said second pressure detecting part is mainly formed by second elastic member 42;
The elastic force that the incoming pressure of said first poppet valve core 31 in said first inlet opening 3 formed by said first elastic member 32 when not reaching the said first pressure predetermined value relies on the limit structure 5 in the said valve body; Said second poppet valve core 41 is positioned at a side of said dorsad first poppet valve core 31 of said limit structure 5; Said second elastic member 42 is supported between said first poppet valve core 31 and said second poppet valve core 41, and said second poppet valve core 41 said second elastic member 42 when the fully open position is in compressive state;
Said dorsad limit structure 5 moved when the incoming pressure of said first poppet valve core 31 in said first inlet opening 3 reached the said first pressure predetermined value;
Aperture reduced until closing gradually when said second poppet valve core 41 moved to said limit structure 5 directions.
Preferably, said first elastic member 32 is a spring.
Preferably, said second elastic member 42 is a spring.
A kind of method for using of hydraulic shovel pressure-gradient control valve wherein, comprises above-mentioned hydraulic shovel pressure-gradient control valve;
Selected one group of excavator composite move of forming by first action and second action;
The first rodding that needs is obtained the first preferential action control valve is connected with said first inlet opening;
Guide's intake line of the second action control valve is connected with said second inlet opening, and the spool of delivery outlet with the said second action control valve is connected.
A kind of method for using of hydraulic shovel pressure-gradient control valve wherein, comprises above-mentioned hydraulic shovel pressure-gradient control valve;
Selected one group of excavator composite move of forming by first action and second action;
The first rodding that needs is obtained the first preferential action control valve is connected with said first inlet opening;
Guide's intake line of the second action control valve is connected with said second inlet opening, and the spool of delivery outlet with the said second action control valve is connected.
Preferably, adjust the first pressure predetermined value through the elastic force of adjusting first elastic member 32.
Preferably, adjust the second pressure predetermined value through the elastic force of adjusting second elastic member 42.
A kind of excavator wherein, comprises above-mentioned hydraulic shovel pressure-gradient control valve, and is configured with the method for using of above-mentioned hydraulic shovel pressure-gradient control valve.
The beneficial effect of technique scheme is:
Can quantitatively regulate preferential opportunity between the composite move, have only when the pilot pressure that preferentially moves during greater than the first pressure predetermined value pressure-gradient control valve just work;
The pilot pressure of the promotion second action control valve valve core movement quantitatively changes with the pilot pressure of preferential action;
The pilot pressure of second action can unrestrictedly not reduce, and minimum value can be set through spring.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of a kind of hydraulic shovel pressure-gradient control valve in the embodiments of the invention;
Fig. 2 is the sectional structure schematic representation of a kind of hydraulic shovel pressure-gradient control valve in the embodiments of the invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further, but not as qualification of the present invention.
As shown in Figure 1, a kind of hydraulic shovel pressure-gradient control valve is provided in the embodiments of the invention, comprise valve body, wherein, valve body is provided with delivery outlet 1, pressure relief opening 2, first inlet opening 3 and second inlet opening 4; First inlet opening 3 is connected with first pressure detecting part, and whether first pressure detecting part reaches the first pressure predetermined value in order to the incoming pressure that detects first inlet opening 3; Second inlet opening 4 control through the spool that is connected with first pressure detecting part and delivery outlet 1 between break-make; The incoming pressure of first pressure detecting part in first inlet opening 3 makes spool be in when not reaching the first pressure predetermined value can not closing state, and the incoming pressure in first inlet opening 3 makes spool be in closable state when reaching the first pressure predetermined value; Also comprise second pressure detecting part; When the incoming pressure that second pressure detecting part is used to second inlet opening 4 reaches the second pressure predetermined value, increase with the incoming pressure of second inlet opening 4 aperture that reduces spool until close fully and with the incoming pressure of second inlet opening 4 reduce and the aperture that increases spool until opening fully.
The working principle of technique scheme is; Before the incoming pressure of first inlet opening 3 reaches the first pressure predetermined value; Spool is in can not closed condition, thereby makes second inlet opening 4 and delivery outlet 1 keep UNICOM, and pressure-gradient control valve was not worked when promptly the pilot pressure of preferential action reached the first pressure predetermined value.But spool is in closed condition when the incoming pressure of first inlet opening 3 reaches the first pressure predetermined value; Pressure-gradient control valve was started working when promptly the pilot pressure of preferential action reached the first pressure predetermined value; Whether closing of spool this moment by of the decrement decision of second pressure detecting part through incoming pressure with the spring 42 this moment of second inlet opening 4; Promptly pressure-gradient control valve is started working when the pilot pressure of second action possibly impact preferential action greater than the second pressure predetermined value; The spool aperture is reduced until closing fully with the incoming pressure increase of second inlet opening 4; Thereby limit the pilot pressure of second action, and with the incoming pressure of second inlet opening 4 reduce and the aperture that increases spool until opening fully, realize that the pilot pressure of second action is not more than the effect of the second pressure predetermined value.
Concrete, technique scheme can be implemented as follows, first pressure detecting part can be mainly by moving first poppet valve core 31 with the incoming pressure variation of first inlet opening 3 and first elastic member 32 forms; Spool mainly changes second poppet valve core 41 that moves by the incoming pressure with second inlet opening 4 and forms; Second pressure detecting part is mainly formed by second elastic member 42; The elastic force that is formed by first elastic member 32 when the incoming pressure of first poppet valve core 31 in first inlet opening 3 do not reach the first pressure predetermined value relies on the limit structure 5 in the valve body; Second poppet valve core 41 is positioned at limit structure 5 side of first poppet valve core 31 dorsad; Second elastic member 42 is supported between first poppet valve core 31 and second poppet valve core 41; Second poppet valve core 41, second elastic member 42 when the fully open position is in compressive state; Aperture reduced until closing gradually when second poppet valve core 41 moved to limit structure 5 directions, and the elastic force that therefore this moment second, poppet valve core 41 applied owing to second elastic member 42 is in can not closing state.When the incoming pressure of first poppet valve core 31 in first inlet opening 3 reaches the first pressure predetermined value dorsad limit structure 5 move because first poppet valve core 31 moves, second elastic member 42 is released; But second poppet valve core 31 is in closed condition; When the incoming pressure of second inlet opening 4 increases gradually, owing to first poppet valve core 31 moves, when second poppet valve core, 41 openings are closed fully; Second elastic member, 42 decrements reduce, and the delivery pressure of actual delivery outlet 1 reduces.Therefore the force value of second inlet opening 4 is limited to equate with the elastic force of second elastic member 42; The pilot pressure that is the action of second in the composite move can be regulated through the elastic force of adjusting second elastic member 42, and also can adjust through the elastic force of adjusting first elastic member 32 the preferential opportunity of same preferential action.What need explanation is that above-mentioned mode of execution only is used for explanation, does not limit mode of execution of the present invention and protection domain.
On the technique scheme basis, further, first elastic member 32 can be that spring, second elastic member 42 also can be springs.
The method for using that also comprises a kind of hydraulic shovel pressure-gradient control valve in the embodiments of the invention wherein, comprises above-mentioned hydraulic shovel pressure-gradient control valve;
Selected one group of excavator composite move of forming by first action and second action;
The first rodding that needs is obtained the first preferential action control valve is connected with first inlet opening 3;
Guide's intake line of the second action control valve is connected with second inlet opening 4, and the spool of delivery outlet 1 with the second action control valve is connected.
Preferably, adjust the first pressure predetermined value through the elastic force of adjusting first elastic member 32.
Preferably, adjust the second pressure predetermined value through the elastic force of adjusting second elastic member 42.
Also comprise a kind of excavator in the embodiments of the invention, wherein, comprise above-mentioned hydraulic shovel pressure-gradient control valve, and be configured with the method for using of above-mentioned hydraulic shovel pressure-gradient control valve.
The above is merely preferred embodiment of the present invention; Be not so limit claim of the present invention; So the equivalent structure that all utilizations specification of the present invention and diagramatic content have been done changes; Or the technological means that those skilled in the art habitually practise replaces, and all is included in protection scope of the present invention.
Claims (9)
1. a hydraulic shovel pressure-gradient control valve comprises valve body, it is characterized in that, said valve body is provided with delivery outlet (1), pressure relief opening (2), first inlet opening (3) and second inlet opening (4);
Said first inlet opening (3) is connected with first pressure detecting part, and whether said first pressure detecting part reaches the first pressure predetermined value in order to the incoming pressure that detects said first inlet opening (3);
Said second inlet opening (4) control through the spool that is connected with said first pressure detecting part and said delivery outlet (1) between break-make; The incoming pressure of said first pressure detecting part in said first inlet opening (3) makes said spool be in when not reaching the said first pressure predetermined value can not closing state, and the incoming pressure in said first inlet opening (3) makes said spool be in closable state when reaching the said first pressure predetermined value;
Also comprise second pressure detecting part; When the incoming pressure that said second pressure detecting part is used to said second inlet opening (4) reaches the second pressure predetermined value, increase with the incoming pressure of said second inlet opening (4) aperture that reduces said spool until close fully and with the incoming pressure of said second inlet opening (4) reduce and the aperture that increases said spool until opening fully.
2. hydraulic shovel pressure-gradient control valve according to claim 1 is characterized in that, said first pressure detecting part is mainly changed by the incoming pressure with said first inlet opening (3) and moves first poppet valve core (31) and first elastic member (32) forms;
Said spool mainly changes second poppet valve core (41) that moves by the incoming pressure with said second inlet opening (4) and forms;
Said second pressure detecting part is mainly formed by second elastic member (42);
The elastic force that the incoming pressure of said first poppet valve core (31) in said first inlet opening (3) formed by said first elastic member (32) when not reaching the said first pressure predetermined value relies on the limit structure (5) in the said valve body; Said second poppet valve core (41) is positioned at a side of said dorsad first poppet valve core of said limit structure (5) (31); Said second elastic member (42) is supported between said first poppet valve core (31) and said second poppet valve core (41), and said second poppet valve core (41) said second elastic member (42) when the fully open position is in compressive state;
Said dorsad limit structure (5) moved when the incoming pressure of said first poppet valve core (31) in said first inlet opening (3) reached the said first pressure predetermined value;
Said second poppet valve core (41) to said limit structure (5) when direction moves aperture reduce gradually until closing.
3. like the said hydraulic shovel pressure-gradient control valve of claim 2, it is characterized in that said first elastic member (32) is a spring.
4. like the said hydraulic shovel pressure-gradient control valve of claim 2, it is characterized in that said second elastic member (42) is a spring.
5. the method for using of a hydraulic shovel pressure-gradient control valve is characterized in that, comprises like arbitrary said hydraulic shovel pressure-gradient control valve among the claim 1-4;
Selected one group of excavator composite move of forming by first action and second action;
The first rodding that needs is obtained the first preferential action control valve is connected with said first inlet opening (3);
Guide's intake line of the second action control valve is connected with said second inlet opening (4), and the spool of delivery outlet (1) with the said second action control valve is connected.
6. the method for using of a hydraulic shovel pressure-gradient control valve is characterized in that, comprises like arbitrary said hydraulic shovel pressure-gradient control valve among the claim 2-4;
Selected one group of excavator composite move of forming by first action and second action;
The first rodding that needs is obtained the first preferential action control valve is connected with said first inlet opening (3);
Guide's intake line of the second action control valve is connected with said second inlet opening (4), and the spool of delivery outlet (1) with the said second action control valve is connected.
7. like the method for using of the said hydraulic shovel pressure-gradient control valve of claim 6, it is characterized in that, adjust the first pressure predetermined value through the elastic force of adjusting first elastic member (32).
8. like the method for using of the said hydraulic shovel pressure-gradient control valve of claim 6, it is characterized in that, adjust the second pressure predetermined value through the elastic force of adjusting second elastic member (42).
9. an excavator is characterized in that, comprises like arbitrary said hydraulic shovel pressure-gradient control valve among the claim 1-4, and is configured with the method for using of arbitrary said hydraulic shovel pressure-gradient control valve among the claim 6-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210214864.4A CN102734244B (en) | 2012-06-27 | 2012-06-27 | Priority valve of hydraulic excavator, using method and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210214864.4A CN102734244B (en) | 2012-06-27 | 2012-06-27 | Priority valve of hydraulic excavator, using method and excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102734244A true CN102734244A (en) | 2012-10-17 |
| CN102734244B CN102734244B (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210214864.4A Expired - Fee Related CN102734244B (en) | 2012-06-27 | 2012-06-27 | Priority valve of hydraulic excavator, using method and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102734244B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015473A (en) * | 2012-12-10 | 2013-04-03 | 三一重机有限公司 | Priority control method of excavator and movable arm to rotation and priority valve |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3308315A1 (en) * | 1983-03-09 | 1984-09-13 | Integral Hydraulik & Co, 4000 Düsseldorf | Priority valve |
| DE3320047A1 (en) * | 1983-06-03 | 1984-12-06 | Robert Bosch Gmbh, 7000 Stuttgart | Hydraulic valve arrangement |
| US4541451A (en) * | 1984-06-15 | 1985-09-17 | Deere & Company | Priority valve |
| JPH0828507A (en) * | 1994-07-12 | 1996-02-02 | Komatsu Ltd | Pilot pressure oil supplying device |
| JPH08199633A (en) * | 1995-01-20 | 1996-08-06 | Komatsu Ltd | Oil hydraulic circuit for hydraulic shovel |
| WO2000051873A1 (en) * | 1999-02-27 | 2000-09-08 | Mannesmann Rexroth Ag | Priority valve for a hydraulic steering circuit |
| CN201144911Y (en) * | 2007-12-10 | 2008-11-05 | 兰州理工大学 | Steering priority type flow amplifying valve |
| CN102410270A (en) * | 2011-11-09 | 2012-04-11 | 兰州理工大学 | Turning gradient control valve |
| CN202251181U (en) * | 2011-09-09 | 2012-05-30 | 湖州生力液压有限公司 | Priority valve assembly |
-
2012
- 2012-06-27 CN CN201210214864.4A patent/CN102734244B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3308315A1 (en) * | 1983-03-09 | 1984-09-13 | Integral Hydraulik & Co, 4000 Düsseldorf | Priority valve |
| DE3320047A1 (en) * | 1983-06-03 | 1984-12-06 | Robert Bosch Gmbh, 7000 Stuttgart | Hydraulic valve arrangement |
| US4541451A (en) * | 1984-06-15 | 1985-09-17 | Deere & Company | Priority valve |
| JPH0828507A (en) * | 1994-07-12 | 1996-02-02 | Komatsu Ltd | Pilot pressure oil supplying device |
| JPH08199633A (en) * | 1995-01-20 | 1996-08-06 | Komatsu Ltd | Oil hydraulic circuit for hydraulic shovel |
| WO2000051873A1 (en) * | 1999-02-27 | 2000-09-08 | Mannesmann Rexroth Ag | Priority valve for a hydraulic steering circuit |
| CN201144911Y (en) * | 2007-12-10 | 2008-11-05 | 兰州理工大学 | Steering priority type flow amplifying valve |
| CN202251181U (en) * | 2011-09-09 | 2012-05-30 | 湖州生力液压有限公司 | Priority valve assembly |
| CN102410270A (en) * | 2011-11-09 | 2012-04-11 | 兰州理工大学 | Turning gradient control valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015473A (en) * | 2012-12-10 | 2013-04-03 | 三一重机有限公司 | Priority control method of excavator and movable arm to rotation and priority valve |
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| Publication number | Publication date |
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| CN102734244B (en) | 2015-04-08 |
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Effective date of registration: 20160311 Address after: 215500 southeast Road, Changshu Southeast Economic Development Zone, Suzhou, Jiangsu, Changshou City Patentee after: Changshu Huawei Track Co.,Ltd. Address before: 201306, No. two, 318 Avenue, Lingang Industrial Park, Shanghai, Fengxian District, A Patentee before: Shanghai Sany Heavy Machinery Co., Ltd. |
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Effective date of registration: 20171205 Address after: 215500 southeast avenue of Changshu Southeast Economic Development Zone, Suzhou, Jiangsu Patentee after: Suote Transmission Equipment Co., Ltd. Address before: 215500 southeast Road, Changshu Southeast Economic Development Zone, Suzhou, Jiangsu, Changshou City Patentee before: Changshu Huawei Track Co.,Ltd. |
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Granted publication date: 20150408 Termination date: 20180627 |