CN203570728U - High-low pressure assembly valve set - Google Patents
High-low pressure assembly valve set Download PDFInfo
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- CN203570728U CN203570728U CN201320662422.6U CN201320662422U CN203570728U CN 203570728 U CN203570728 U CN 203570728U CN 201320662422 U CN201320662422 U CN 201320662422U CN 203570728 U CN203570728 U CN 203570728U
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- valve
- logical
- outlet
- low pressure
- logical valve
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Abstract
The utility model belongs to the technical field of hydraulic valves, and relates to a high-low pressure assembly valve set. The high-low pressure assembly valve set comprises a check valve, a first logical valve, a second logical valve and a two-position four-way reversing valve, an inlet of the check valve is connected with a high-pressure oil pump, an outlet of the check valve is divided into two paths, one path is connected with a work oil cylinder, the other path is connected with an inlet of the first logical valve, an outlet of the first logical valve is connected with an oil tank, a control opening of the first logical valve is connected with an inlet of the two-position four-way reversing valve, an outlet of the two-position four-way reversing valve is connected with the oil tank, a work oil opening of the two-position four-way reversing valve is connected with the oil tank, an inlet of the second logical valve is connected with a low-pressure oil pump, and an outlet of the second logical valve is connected with the work oil cylinder.
Description
Technical field
The utility model belongs to hydrovalve technical field, especially designs a kind of high low pressure assembly valve group applying in double pump system.
Background technique
In the utilization of some oil circuits, many times all can use high low pressure double pump system, system comprises a high-pressure service pump and a low pressure pump, this oil circuit generally all comprises two kinds of working staties, high-pressure low-flow and low pressure and mass flows.During high-pressure low-flow operating mode, low pressure pump quits work, and high-pressure service pump will be exported high-voltage oil liquid in clutch release slave cylinder; During low pressure and mass flow operating mode, high-pressure service pump quits work, and low pressure pump is delivered to the fluid of output in clutch release slave cylinder.Originally, for this double pump system, do not have special integrated control valve group.
Summary of the invention
The utility model, for the deficiencies in the prior art, provides a kind of high low pressure assembly valve group, is specially adapted in high low pressure double pump system.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals: a kind of high low pressure assembly valve group, comprise one-way valve, the first logical valve, the second logical valve and two-position four way change valve, the import of described one-way valve is connected with high pressure oil pump, the outlet of described one-way valve is divided into two-way, one tunnel is connected with operating cylinder, another road is connected with the import of described the first logical valve, the outlet of described the first logical valve is connected with described fuel tank, the control mouth of described the first logical valve is connected with the import of described two-position four-way one-way valve, the outlet of described two-position four-way one-way valve is connected with fuel tank, an actuator port of described two-position four way change valve is connected with fuel tank, the import of described the second logical valve is connected with low pressure fuel pump, the outlet of described the second logical valve is connected with operating cylinder.During low pressure and mass flow work, import on two-position four way change valve is connected with fuel tank, this also just makes the first logical valve control mouth communicate with fuel tank, the fluid of the output of high-pressure service pump has directly been supplied to fuel tank, the fluid of low pressure pump output is transported to operating cylinder after the second logical valve in addition, realizes fuel feeding.During high-pressure low-flow work, low pressure pump cuts out, and two-position four way change valve switches, and the import of the first logical valve and outlet do not communicate, and the fluid of high-pressure service pump output directly arrives operating cylinder, realizes the work of high pressure low discharge.
In technique scheme, preferred, also comprise a relief valve, the import of described relief valve is connected with the control mouth of described the first logical valve, and the outlet of described relief valve is connected with described fuel tank.
In technique scheme, preferably, also comprise one the 3rd logical valve and equilibrium valve, be connected with the described low pressure fuel pump outlet of described the second logical valve of the import of described the 3rd logical valve is connected with described fuel tank, the control mouth of described the 3rd logical valve is connected with the import of described equilibrium valve, the outlet of described the 3rd logical valve is connected with described fuel tank, and the control mouth of described the 3rd logical valve is connected with described operating cylinder.When the load of system increases, the filler opening of equilibrium valve and oil outlet are communicated with, and this just makes the filler opening of the 3rd oiling valve and oil outlet be connected, and the fluid that low pressure pump flows out directly enters mailbox.
The utility model compared with prior art, there is following beneficial effect: during low pressure and mass flow work, import on two-position four way change valve is connected with fuel tank, this also just makes the first logical valve control mouth communicate with fuel tank, the fluid of the output of high-pressure service pump has directly been supplied to fuel tank, the fluid of low pressure pump output is transported to operating cylinder after the second logical valve in addition, realizes fuel feeding.During high-pressure low-flow work, low pressure pump cuts out, and two-position four way change valve switches, and the import of the first logical valve and outlet do not communicate, and the fluid of high-pressure service pump output directly arrives operating cylinder, realizes the work of high pressure low discharge.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment's schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Referring to Fig. 1, a kind of high low pressure assembly valve group, comprise one-way valve 1, the first logical valve 2, the second logical valve 3 and two-position four way change valve 4, the import of described one-way valve 1 is connected with high pressure oil pump 11, the outlet of described one-way valve 1 is divided into two-way, one tunnel is connected with operating cylinder 21, another road is connected with the import of described the first logical valve 2, the outlet of described the first logical valve 2 is connected with described fuel tank, the control mouth of described the first logical valve 2 is connected with the import of described two-position four-way one-way valve 4, the outlet of described two-position four-way one-way valve 4 is connected with fuel tank 31, an actuator port of described two-position four way change valve 4 is connected with fuel tank 31, the import of described the second logical valve 3 is connected with low pressure fuel pump 12, the outlet of described the second logical valve 3 is connected with operating cylinder 21.
Also comprise a relief valve 5, the import of described relief valve 5 is connected with the control mouth of described the first logical valve 2, and the outlet of described relief valve 5 is connected with described fuel tank.
Also comprise the 3rd logical valve 6 and equilibrium valve 7, be connected with the described low pressure fuel pump outlet of described the second logical valve 3 of the import of described the 3rd logical valve 6 is connected with described fuel tank, the control mouth of described the 3rd logical valve 3 is connected with the import of described equilibrium valve 7, the outlet of described the 3rd logical valve 6 is connected with described fuel tank, and the control mouth of described the 3rd logical valve 3 is connected with described operating cylinder.
Claims (3)
1. a high low pressure assembly valve group, it is characterized in that: comprise one-way valve (1), the first logical valve (2), the second logical valve (3) and two-position four way change valve (4), the import of described one-way valve (1) is connected with high pressure oil pump, the outlet of described one-way valve (1) is divided into two-way, one tunnel is connected with operating cylinder, another road is connected with the import of described the first logical valve (2), the outlet of described the first logical valve (2) is connected with described fuel tank, the control mouth of described the first logical valve (2) is connected with the import of described two-position four-way one-way valve (4), the outlet of described two-position four-way one-way valve (4) is connected with fuel tank, an actuator port of described two-position four way change valve (4) is connected with fuel tank, the import of described the second logical valve (3) is connected with low pressure fuel pump, the outlet of described the second logical valve (3) is connected with operating cylinder.
2. high low pressure assembly valve group according to claim 1, it is characterized in that: also comprise a relief valve (5), the import of described relief valve (5) is connected with the control mouth of described the first logical valve (2), and the outlet of described relief valve (5) is connected with described fuel tank.
3. high low pressure assembly valve group according to claim 1, it is characterized in that: also comprise the 3rd logical valve (6) and equilibrium valve (7), be connected with the described low pressure fuel pump outlet of described the second logical valve (3) of the import of described the 3rd logical valve (6) is connected with described fuel tank, the control mouth of described the 3rd logical valve (3) is connected with the import of described equilibrium valve (7), the outlet of described the 3rd logical valve (6) is connected with described fuel tank, and the control mouth of described the 3rd logical valve (3) is connected with described operating cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662422.6U CN203570728U (en) | 2013-10-25 | 2013-10-25 | High-low pressure assembly valve set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662422.6U CN203570728U (en) | 2013-10-25 | 2013-10-25 | High-low pressure assembly valve set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203570728U true CN203570728U (en) | 2014-04-30 |
Family
ID=50538461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320662422.6U Expired - Fee Related CN203570728U (en) | 2013-10-25 | 2013-10-25 | High-low pressure assembly valve set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203570728U (en) |
-
2013
- 2013-10-25 CN CN201320662422.6U patent/CN203570728U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20140430 Termination date: 20141025 |
|
| EXPY | Termination of patent right or utility model |