CN201507494U - Pilot valve block of loader operation device - Google Patents
Pilot valve block of loader operation device Download PDFInfo
- Publication number
- CN201507494U CN201507494U CN 200920224019 CN200920224019U CN201507494U CN 201507494 U CN201507494 U CN 201507494U CN 200920224019 CN200920224019 CN 200920224019 CN 200920224019 U CN200920224019 U CN 200920224019U CN 201507494 U CN201507494 U CN 201507494U
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- CN
- China
- Prior art keywords
- valve
- solenoid directional
- directional control
- way solenoid
- electro
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- 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
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- Operation Control Of Excavators (AREA)
Abstract
A pilot valve block of loader operation device belongs to a pilot valve block used by a wheel loader. An electro-hydraulic proportional relief valve, two three-position four-way electromagnetic directional valves and a two-position four-way electromagnetic directional valves of the pilot valve block are connected with the valve block. The two three-position four-way electromagnetic directional valves are provided in the middle. The electro-hydraulic proportional relief valve and the two-position four-way electromagnetic directional valves are provided at two sides. One port of the electro-hydraulic proportional relief valve is connected with a pilot oil control end. The output port of the electro-hydraulic proportional relief valve is simultaneously connected with the input ends of the two three-position four-way electromagnetic directional valves. One port of the electro-hydraulic proportional relief valve is simultaneously connected with one port of two three-position four-way electromagnetic directional valves and one end of the two-position four-way electromagnetic directional valves. The electro-hydraulic proportional relief valve, the two three-position four-way electromagnetic directional valves and the two-position four-way electromagnetic directional valves are correspondingly connected through the openings on the valve block. The pilot valve block of loader operation device has the following advantages: compact and simple structure, sensitive movement, good reliability, good sealing performance, and small vibration.
Description
Technical field
The utility model relates to the pilot valve piece that a kind of wheel loader is used, and particularly relates to a kind of working device of loader pilot valve piece.
Background technique
The driver needs the frequent operation hydraulic control system during loader operation, and the control valve of control swing arm, bucket cylinder was handled about 3200 times according to statistics in 8 hours, and the operator is tired easily, reduces efficiency.The working device of loader hydraulic control system generally is to use operating handle manually directly to control main reversing valve, and manually directly control main reversing valve action required power is big to use operating handle, and the operator is tired easily; Also having a kind of is operating handle manual control guide proportion reduction valve, then by guide proportion reduction valve hydraulic control main reversing valve.At present, loader mainly adopts manually directly control and hydraulic pilot control main reversing valve technology, and its shortcoming is: steering force is big, reversing impact is big, control performance is poor.
The model utility content
The purpose of this utility model is to provide a kind of: the working device of loader pilot valve piece that steering force is little, reversing impact is little, control performance is good.
The purpose of this utility model is achieved in that this working device of loader pilot valve piece includes electro-hydraulic proportional reducing valve (1), the 3-position 4-way solenoid directional control valve, two-position four-way solenoid directional control valve (4) and valve piece (5), electro-hydraulic proportional reducing valve (1), two 3-position 4-way solenoid directional control valves (2) and 3-position 4-way solenoid directional control valve (3), two-position four-way solenoid directional control valve (4) all is connected on the valve piece (5), in the middle of two 3-position 4-way solenoid directional control valves (2) and 3-position 4-way solenoid directional control valve (3) were positioned at, electro-hydraulic proportional reducing valve (1) and two-position four-way solenoid directional control valve (4) were positioned at two sides; Port of electro-hydraulic proportional reducing valve is connected with the guide oil control end, the output port of electro-hydraulic proportional reducing valve is connected with the input end of two 3-position 4-way solenoid directional control valves (2) with 3-position 4-way solenoid directional control valve (3) simultaneously, and a port of electro-hydraulic proportional reducing valve is connected and is communicated with fuel tank with an end of (3) ports of two 3-position 4-way solenoid directional control valves (2) and 3-position 4-way solenoid directional control valve and two-position four-way solenoid directional control valve (4) simultaneously; Being connected all of electro-hydraulic proportional reducing valve (1), two 3-position 4-way solenoid directional control valves (2) and 3-position 4-way solenoid directional control valve (3) and two-position four-way solenoid directional control valve (4) connects by the hole on the valve piece (5) is corresponding.
Beneficial effect, owing to adopted such scheme, electro-hydraulic proportional reducing valve to be positioned at a end on the valve piece, electro-hydraulic proportional reducing valve adopts plug-in type, and is simple in structure, is active in one's movements reliability and good airproof performance; Two 3-position 4-way solenoid directional control valves are placed on the centre of valve piece, the commutation of control boom cylinder and bucket cylinder, and the two-position four-way solenoid directional control valve is positioned at the other end of valve piece, controls floating of swing arm; Electro-hydraulic proportional reducing valve, 3-position 4-way solenoid directional control valve, two-position four-way solenoid directional control valve connect by the hole on the valve piece is corresponding, so just reduced the pipeline connection, the complexity of reduction system, increase the on-the-spot flexibility of adding and changing the loop, steering force is little, reversing impact is little, control performance is good, has reached the purpose of this utility model.
Advantage: adopt plug-in type, compact structure, simple uses element few, be active in one's movements, reliability and good airproof performance, safe, easy to maintenance, reveal less, vibration is little.Each selector valve is installed on the valve piece, and hydraulic control system is more reasonable, the efficient of whole loader significantly improves, and has reduced the pipeline that is connected between valve and the valve, and the hydraulic system heat producing losses is reduced, and also greatly reduces rate of fault simultaneously.
Description of drawings
Fig. 1 is the hydraulic system principle figure of working device of loader pilot valve piece
Fig. 2 is the plan view of working device of loader pilot valve piece
Fig. 3 is the plan view of working device of loader pilot valve piece
Among the figure, 1, electro-hydraulic proportional reducing valve; 2, solenoid directional control valve; 3, solenoid directional control valve; 4, solenoid directional control valve; 5, valve piece.
Embodiment
Embodiment 1: this working device of loader pilot valve piece includes electro-hydraulic proportional reducing valve 1,3-position 4-way solenoid directional control valve, two-position four-way solenoid directional control valve 4 and valve piece 5, electro-hydraulic proportional reducing valve 1, two 3-position 4-way solenoid directional control valves (2 and 3), two-position four-way solenoid directional control valves 4 all are connected on the valve piece 5, in the middle of two 3-position 4-way solenoid directional control valves 2 and 3-position 4-way solenoid directional control valve 3 were positioned at, electro-hydraulic proportional reducing valve 1 and two-position four-way solenoid directional control valve 4 were positioned at two sides; Filler opening of electro-hydraulic proportional reducing valve is connected with guide oil control mouth, the output oil port of electro-hydraulic proportional reducing valve is connected with the input hydraulic fluid port of two 3-position 4-way solenoid directional control valves 2 and 3-position 4-way solenoid directional control valve 3 simultaneously, and a return opening of electro-hydraulic proportional reducing valve is connected and is communicated with fuel tank with the return opening of two 3-position 4-way solenoid directional control valves 2 with 3-position 4-way solenoid directional control valve 3 return openings and two-position four-way solenoid directional control valve 4 simultaneously; Electro-hydraulic proportional reducing valve 1, two 3-position 4-way solenoid directional control valves 2 and connect being connected all of 3-position 4-way solenoid directional control valve 3 and two-position four-way solenoid directional control valve 4 by the hole on the valve piece 5 is corresponding.
The valve piece is used to control the commutation of main commutation multi-way valve, electro-hydraulic proportional reducing valve 1 provides can continually varying guide pilot pressure, two 3-position 4-way solenoid directional control valves 2 and 3-position 4-way solenoid directional control valve 3 are controlled the swing arm connection of main multi-way valve and the commutation that scraper bowl joins respectively, so just can control the speed of main multi-way reversing valve core commutation by the pilot pressure that changes electro-hydraulic proportional reducing valve, thereby control loader amplitude oil cylinder and bucket cylinder is flexible, this control mode has improved the control performance of loader greatly, especially fretting performance can be made meticulousr work.When loader under the place of highland injustice during operation, for preventing the destruction of scraper bowl to ground, need swing arm is placed the work operating mode of floating, give solenoid directional control valve 3 energisings, the oily hydraulic control mouth of opening Pilot operated check valve in the main valve of control makes the rod chamber and the rodless cavity conducting of boom cylinder, enters unsteady operating mode.
Claims (1)
1. working device of loader pilot valve piece, it is characterized in that: this working device of loader pilot valve piece includes electro-hydraulic proportional reducing valve (1), the 3-position 4-way solenoid directional control valve, two-position four-way solenoid directional control valve (4) and valve piece (5), electro-hydraulic proportional reducing valve (1), two 3-position 4-way solenoid directional control valves (2) and 3-position 4-way solenoid directional control valve (3), two-position four-way solenoid directional control valve (4) all is connected on the valve piece (5), in the middle of two 3-position 4-way solenoid directional control valves (2) and 3-position 4-way solenoid directional control valve (3) were positioned at, electro-hydraulic proportional reducing valve (1) and two-position four-way solenoid directional control valve (4) were positioned at two sides; Port of electro-hydraulic proportional reducing valve is connected with the guide oil control end, the output port of electro-hydraulic proportional reducing valve is connected with the input end of two 3-position 4-way solenoid directional control valves (2) with 3-position 4-way solenoid directional control valve (3) simultaneously, and a port of electro-hydraulic proportional reducing valve is connected and is communicated with fuel tank with an end of (3) ports of two 3-position 4-way solenoid directional control valves (2) and 3-position 4-way solenoid directional control valve and two-position four-way solenoid directional control valve (4) simultaneously; Being connected all of electro-hydraulic proportional reducing valve (1), two 3-position 4-way solenoid directional control valves (2) and 3-position 4-way solenoid directional control valve (3) and two-position four-way solenoid directional control valve (4) connects by the hole on the valve piece (5) is corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920224019 CN201507494U (en) | 2009-09-25 | 2009-09-25 | Pilot valve block of loader operation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920224019 CN201507494U (en) | 2009-09-25 | 2009-09-25 | Pilot valve block of loader operation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201507494U true CN201507494U (en) | 2010-06-16 |
Family
ID=42468621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920224019 Expired - Fee Related CN201507494U (en) | 2009-09-25 | 2009-09-25 | Pilot valve block of loader operation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201507494U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334463A (en) * | 2013-05-24 | 2013-10-02 | 龙工(上海)机械制造有限公司 | Electro-hydraulic proportional control system and method of working device of loader |
| CN103807243A (en) * | 2014-01-21 | 2014-05-21 | 广西柳工机械股份有限公司 | Electric proportional decompression cushion valve for engineering machines |
| CN106402059A (en) * | 2016-12-26 | 2017-02-15 | 徐工集团工程机械有限公司 | Load port individual valve, hydraulic bus control system and engineering machinery |
-
2009
- 2009-09-25 CN CN 200920224019 patent/CN201507494U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334463A (en) * | 2013-05-24 | 2013-10-02 | 龙工(上海)机械制造有限公司 | Electro-hydraulic proportional control system and method of working device of loader |
| CN103807243A (en) * | 2014-01-21 | 2014-05-21 | 广西柳工机械股份有限公司 | Electric proportional decompression cushion valve for engineering machines |
| CN106402059A (en) * | 2016-12-26 | 2017-02-15 | 徐工集团工程机械有限公司 | Load port individual valve, hydraulic bus control system and engineering machinery |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20160925 |