CN204570787U - excavator pilot pressure secondary control loop - Google Patents
excavator pilot pressure secondary control loop Download PDFInfo
- Publication number
- CN204570787U CN204570787U CN201420862634.3U CN201420862634U CN204570787U CN 204570787 U CN204570787 U CN 204570787U CN 201420862634 U CN201420862634 U CN 201420862634U CN 204570787 U CN204570787 U CN 204570787U
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- valve
- control valve
- pilot
- main control
- hydraulic
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a kind of excavator pilot pressure secondary control loop, comprise pilot control valve (1), main control valve (4), hydraulic pump (5), executive component (6), hydraulic oil container (7); Pilot control valve (1), hydraulic pump (5), executive component (6) and hydraulic oil container (7) are connected to main control valve (4) respectively by oil circuit, also comprise stop valve (2) and overflow valve (3), stop valve (2) and overflow valve (3) are connected to after connecting on the guide's oil circuit between pilot control valve (1) and main control valve (4).Beneficial effect is the restriction loss that can reduce working connection, and save energy, the control loop increased is closed when not using, namely system reverts to original system, does not need dismounting, avoids hydraulic system contaminated, further, the component size increased is little lightweight, convenient for installation and maintenance.
Description
Technical field
The utility model relates to a kind of excavator pilot pressure secondary control loop, belongs to excavator guide technical field of hydraulic pressure.
Background technology
Motor and oil cylinder are the executive components that excavator realizes various output action, specifically work for completing some, need to install specific function facility, and need to limit the speed of some executive components.And being design and supporting convenience, Hydraulic Main system is generally general; When Hydraulic Main system is constant, in order to mate the demand of specific function facility, the speed of executive component is limited, generally mainly realize by increasing restricting element such as the mode such as choke valve, flow speed control valve on oil supply bar road, adopting the defect existed in this way is: on oil supply bar road, increase restricting element, and the waste of energy and hydraulic oil temperature can be caused to raise; As recovered original system, also need to dismantle restricting element, increase the contaminated probability of hydraulic system, the restricting element volume weight installed on working connection is in addition comparatively large, installation and maintenance inconvenience.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of excavator pilot pressure secondary control loop, realizes resetting executive component speed easily.
To achieve these goals, the technical solution adopted in the utility model is: a kind of excavator pilot pressure secondary control loop, comprises pilot control valve, main control valve, hydraulic pump, executive component, hydraulic oil container; Pilot control valve, hydraulic pump, executive component and hydraulic oil container are connected to main control valve respectively by oil circuit, also comprise stop valve and overflow valve, and stop valve and overflow valve are connected to after connecting on the guide's oil circuit between pilot control valve and main control valve.
The pressure regulation spectrum of overflow valve is 0-4MPa.
Stop valve and overflow valve are integrated in a valve block.
The utility model can reduce the restriction loss of working connection, and save energy, the control loop increased is closed when not using, namely system reverts to original system, does not need dismounting, avoids hydraulic system contaminated, further, the component size increased is little lightweight, convenient for installation and maintenance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1, pilot control valve, 2, stop valve, 3, overflow valve, 4, main control valve, 5, hydraulic pump, 6, executive component, 7, hydraulic oil container.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1: the utility model comprises pilot control valve 1, main control valve 4, hydraulic pump 5, executive component 6, hydraulic oil container 7; Pilot control valve 1, hydraulic pump 5, executive component 6 and hydraulic oil container 7 are connected to main control valve 4 respectively by oil circuit, also comprise stop valve 2 and overflow valve 3, and stop valve 2 and overflow valve 3 are connected to after connecting on the guide's oil circuit between pilot control valve 1 and main control valve 4.The pressure of overflow valve 3 regulates 0-4MPa, and this pressure regulation spectrum can meet the demand of installing specific function facility.
Stop valve 2 and overflow valve 3 are integrated in a valve block, and structure is compacter, are also convenient to follow-up I&M.
The utility model in the course of the work, by stop valve 2 and overflow valve 3 pilot pressure linear quadratic control in series oil circuit.When excavator be in not need under common operating mode specific function facility are installed time, stop valve 2 is in closed condition, and pilot pressure linear quadratic control oil circuit is inoperative; When needing install specific function facility and need to reset the speed of executive component 6, stop valve 2 is opened, by the setting pressure of regulation relief valve 3, to control the guide oil pressure that pilot control valve 1 exports main control valve 4 to, thus control the aperture area of main control valve 4 spool, control to reach the object that main control valve 4 exports executive component 6 flow to, thus realize resetting executive component 6 speed.
Claims (3)
1. an excavator pilot pressure secondary control loop, comprises pilot control valve (1), main control valve (4), hydraulic pump (5), executive component (6), hydraulic oil container (7); Pilot control valve (1), hydraulic pump (5), executive component (6) and hydraulic oil container (7) are connected to main control valve (4) respectively by oil circuit, it is characterized in that, also comprise stop valve (2) and overflow valve (3), stop valve (2) and overflow valve (3) are connected to after connecting on the guide's oil circuit between pilot control valve (1) and main control valve (4).
2. a kind of excavator pilot pressure secondary control loop according to claim 1, it is characterized in that, the pressure regulation spectrum of overflow valve (3) is 0-4MPa.
3. a kind of excavator pilot pressure secondary control loop according to claim 1 and 2, is characterized in that, stop valve (2) and overflow valve (3) are integrated in a valve block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420862634.3U CN204570787U (en) | 2014-12-31 | 2014-12-31 | excavator pilot pressure secondary control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420862634.3U CN204570787U (en) | 2014-12-31 | 2014-12-31 | excavator pilot pressure secondary control loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204570787U true CN204570787U (en) | 2015-08-19 |
Family
ID=53863449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420862634.3U Active CN204570787U (en) | 2014-12-31 | 2014-12-31 | excavator pilot pressure secondary control loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204570787U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840295A (en) * | 2017-01-24 | 2017-06-13 | 徐州市产品质量监督检验中心 | A kind of excavator fuel economy intelligent checking system and method |
-
2014
- 2014-12-31 CN CN201420862634.3U patent/CN204570787U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840295A (en) * | 2017-01-24 | 2017-06-13 | 徐州市产品质量监督检验中心 | A kind of excavator fuel economy intelligent checking system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |