CN103741763A - Excavator movable arm priority valve - Google Patents
Excavator movable arm priority valve Download PDFInfo
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- CN103741763A CN103741763A CN201410010094.0A CN201410010094A CN103741763A CN 103741763 A CN103741763 A CN 103741763A CN 201410010094 A CN201410010094 A CN 201410010094A CN 103741763 A CN103741763 A CN 103741763A
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- valve
- pilot
- movable arm
- rotary
- oil
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Abstract
The invention discloses an excavator movable arm priority valve. The excavator movable arm priority valve comprises a left rotary pilot valve and a right rotary pilot valve which are correspondingly communicated with left and right ends of a rotary valve block respectively, throttle valves are mounted at connecting positions between the left rotary pilot valve and the rotary valve block and between the right rotary pilot valve and the rotary valve block respectively, the throttle valves are mutually correspondingly communicated with two ends of a shuttle valve through oil channels respectively, the shuttle valve is communicated with a reversing valve through the oil channels, the reversing valve is communicated with a movable arm lifting pilot valve and an oil tank through the oil channels respectively, and the reversing valve is connected with the oil tank through the throttle valves. By means of the excavator movable arm priority valve, when combined actions of rotating and movable arm lifting are performed, parts of left and right rotary pilot oil channels flow into the rotary valve block to control a main valve element to slide, other parts of oil channels reach the two ends of the shuttle valve, at the moment, the reversing valve is in a conducting state when the movable arm lifting pilot pressure is larger than spring pressure in the reversing valve, left and right rotary pilot oil flows into the oil tank, and technical problems of limited lifting range and application, poor operation coordination, and low working efficiency in prior art are solved.
Description
technical fieldthe invention belongs to technical field of engineering machinery, be specifically related to a kind of excavator swing arm pressure-gradient control valve.
background technologyin prior art, excavator is when actual job, owing to being subject to driver's the difference of operating habit and work condition environment, when the composite move of excavator is turned round+swing arm lifting, there is different requirements, for example, when excavator is cleared up the operation of riverway sludge, mostly the scope of activities of swing arm is to be promoted to maximum height (riverbank) from excavating depth capacity (river bed), in this operating process, the expanded reach of excavator swing arm is large, need the activity duration long, if the speed of gyration of excavator is fast, swing arm may not reach the operation expanded reach of appointment, inefficiency, expanded reach is limited, the harmony of operation is low, apply limited, now need to adjust the relation of speed of gyration and swing arm hoisting velocity, when guaranteeing that swing arm expanded reach can meet requiring of operation, speed of gyration is adjusted, in this case, excavator swing arm pressure-gradient control valve need to be installed, to promote operating efficiency, operation action is coordinated more.
summary of the inventionthe object of the invention is to solve that prior art exists that expanded reach is limited, operational coordination is poor, inefficiency and the limited technical problem of application, provide a kind of excavator swing arm pressure-gradient control valve, to overcome the deficiencies in the prior art.
To achieve these goals, a kind of excavator swing arm pressure-gradient control valve of the present invention, it comprises left revolution pilot valve and the right-hand rotation pilot valve of connection corresponding to two ends, revolving valve piece left and right respectively; Its main points are that the junction of described left revolution pilot valve and right-hand rotation pilot valve and revolving valve piece is respectively equipped with choke valve; The two ends corresponding connection mutually with shuttle valve by oil circuit respectively of described choke valve; Described shuttle valve is communicated with reversal valve by oil circuit; Described reversal valve promotes pilot valve with swing arm respectively by oil circuit and fuel tank is communicated with; Between described reversal valve and fuel tank, by choke valve, be connected.
The present invention is rational in infrastructure, novel in design, because the junction of left revolution pilot valve and right-hand rotation pilot valve and revolving valve piece is respectively equipped with choke valve, when carrying out revolution+swing arm lifting composite move, a left and right revolution guide oil circuit part flows into the slippage of revolving valve piece control valve core of main valve, another part oil circuit arrives shuttle valve two ends, when left and right revolution, shuttle valve is opened, reversal valve conducting when if now swing arm lifting pilot pressure is greater than reversal valve medi-spring pressure, left and right revolution guide fluid flows into fuel tank; The present invention, by changing the opening degree of different choke valves, can realize the operation requirements of revolution+swing arm lifting, has solved that prior art expanded reach is limited, operational coordination is poor, inefficiency and the limited technical problem of application.
accompanying drawing explanationaccompanying drawing is structural principle schematic diagram of the present invention.
In figure 1, left revolution pilot valve 2, choke valve 3, revolving valve piece 4, right-hand rotation pilot valve 5, shuttle valve 6, reversal valve 7, choke valve 8, swing arm promote pilot valve 9, fuel tank
the specific embodimentwith reference to accompanying drawing, it comprises left revolution pilot valve 1 and the right-hand rotation pilot valve 4 of connection corresponding to revolving valve piece 3 two ends, left and right respectively the present invention; Described left revolution pilot valve 1 and right-hand rotation pilot valve 4 are respectively equipped with choke valve 2 with the junction of revolving valve piece 3; The two ends corresponding connection mutually with shuttle valve 5 by oil circuit respectively of described choke valve 2; Described shuttle valve 5 is communicated with reversal valve 6 by oil circuit; Described reversal valve 6 promotes pilot valve 8 with swing arm respectively by oil circuit and fuel tank 9 is communicated with; Between described reversal valve 6 and fuel tank 9, by choke valve 7, be connected.
Operating principle: on left and right revolution pilot valve 1,4 oil circuits, series throttle 2 is controlled the flow that flows to revolving valve piece 3 guide's parts respectively, when carrying out revolution+swing arm lifting composite move, an oil circuit part for left and right revolution pilot valve 1,4 flows into revolving valve piece 3 and controls valve core of main valve slippage, another part oil circuit arrives shuttle valve XD or YD end simultaneously, when carrying out left and right revolution, shuttle valve 5 is opened, reversal valve 6 conductings when if now swing arm lifting pilot valve 8 pressure are greater than reversal valve 6 medi-spring pressure, the fluid part of left and right revolution pilot valve 1,4 flows into fuel tank 9; By changing the different opening degree of choke valve 2,7, can realize the requirement that revolution+swing arm promotes.
The present invention, when swing arm promotes, turns round pilot pressure oil by part and lets out to fuel tank, and different amount of leakage can be realized the difference in identical angle of revolution downward moving arm hoisting depth; The adjusting of amount of leakage can realize by the different openings degree of choke valve; Under different job requirements, can make swing arm hoisting depth and speed of gyration remain in a suitable scope, improve the harmony of action, improve the function of excavator, improved operating efficiency, make the usage range of excavator wider, strong adaptability.
Claims (1)
1. an excavator swing arm pressure-gradient control valve, it comprises left revolution pilot valve and the right-hand rotation pilot valve of connection corresponding to two ends, revolving valve piece left and right respectively; The junction that it is characterized in that described left revolution pilot valve and right-hand rotation pilot valve and revolving valve piece is respectively equipped with choke valve; The two ends corresponding connection mutually with shuttle valve by oil circuit respectively of described choke valve; Described shuttle valve is communicated with reversal valve by oil circuit; Described reversal valve promotes pilot valve with swing arm respectively by oil circuit and fuel tank is communicated with; Between described reversal valve and fuel tank, by choke valve, be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410010094.0A CN103741763A (en) | 2014-01-10 | 2014-01-10 | Excavator movable arm priority valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410010094.0A CN103741763A (en) | 2014-01-10 | 2014-01-10 | Excavator movable arm priority valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103741763A true CN103741763A (en) | 2014-04-23 |
Family
ID=50498822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410010094.0A Pending CN103741763A (en) | 2014-01-10 | 2014-01-10 | Excavator movable arm priority valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103741763A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089763A (en) * | 2021-04-16 | 2021-07-09 | 徐州徐工挖掘机械有限公司 | Multi-stage safety handle control system and method for excavator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979908A (en) * | 1975-09-29 | 1976-09-14 | The Cessna Aircraft Company | Priority flow valve |
| US4098286A (en) * | 1975-12-19 | 1978-07-04 | J.C. Bamford Excavators Limited | Hydraulic control valve assembly |
| CN102003425A (en) * | 2010-11-29 | 2011-04-06 | 广西玉柴重工有限公司 | Priority valve for hydraulic excavator |
| CN202416430U (en) * | 2012-02-16 | 2012-09-05 | 熔盛机械有限公司 | Revolution buffering and arm movement priority control system in hydraulic control positive flow system of excavator |
| CN102704515A (en) * | 2012-06-26 | 2012-10-03 | 上海三一重机有限公司 | Priority control system and method of hydraulic excavator and excavator |
| CN203654371U (en) * | 2014-01-10 | 2014-06-18 | 山重建机(济宁)有限公司 | Movable arm priority valve for excvavtor |
-
2014
- 2014-01-10 CN CN201410010094.0A patent/CN103741763A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979908A (en) * | 1975-09-29 | 1976-09-14 | The Cessna Aircraft Company | Priority flow valve |
| US4098286A (en) * | 1975-12-19 | 1978-07-04 | J.C. Bamford Excavators Limited | Hydraulic control valve assembly |
| CN102003425A (en) * | 2010-11-29 | 2011-04-06 | 广西玉柴重工有限公司 | Priority valve for hydraulic excavator |
| CN202416430U (en) * | 2012-02-16 | 2012-09-05 | 熔盛机械有限公司 | Revolution buffering and arm movement priority control system in hydraulic control positive flow system of excavator |
| CN102704515A (en) * | 2012-06-26 | 2012-10-03 | 上海三一重机有限公司 | Priority control system and method of hydraulic excavator and excavator |
| CN203654371U (en) * | 2014-01-10 | 2014-06-18 | 山重建机(济宁)有限公司 | Movable arm priority valve for excvavtor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089763A (en) * | 2021-04-16 | 2021-07-09 | 徐州徐工挖掘机械有限公司 | Multi-stage safety handle control system and method for excavator |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140423 |