CN207047941U - A kind of small type hydraulic excavator pilot control valve group and small type hydraulic excavator - Google Patents
A kind of small type hydraulic excavator pilot control valve group and small type hydraulic excavator Download PDFInfo
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- CN207047941U CN207047941U CN201720764588.7U CN201720764588U CN207047941U CN 207047941 U CN207047941 U CN 207047941U CN 201720764588 U CN201720764588 U CN 201720764588U CN 207047941 U CN207047941 U CN 207047941U
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- control valve
- valve
- pressure
- solenoid directional
- directional control
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Abstract
The utility model discloses a kind of small type hydraulic excavator pilot control valve group and small type hydraulic excavator, the pilot control valve group includes pressure-reducing valve, pressure measuring tie-in, check valve, accumulator, the first solenoid directional control valve, the second solenoid directional control valve and overflow valve；The oil-out of the check valve is connected with the first solenoid directional control valve and accumulator respectively, and the oiler of the check valve is connected with pressure-reducing valve, pressure measuring tie-in, overflow valve, the second solenoid directional control valve respectively.Before check valve is placed in accumulator and the first solenoid directional control valve by the utility model, after remaining all valve group element hydraulic fluid port；During digging machine working connection not pressure release, the pressure of accumulator storage is due to the pressure maintaining effect of check valve, it will not be revealed by remaining hydraulic fluid port, when pressure release, in the state of engine stop operating and security solenoid valve have signal, pass through the first solenoid directional control valve pressure release, effectively increase the dwell time of pilot control valve group, maintenance is more convenient, reduces potential safety hazard.
Description
Technical field
A kind of small type hydraulic excavator leading oil source control valve group is the utility model is related to, belongs to hydraulic valve bank technology neck
Domain.
Background technology
The pilot control valve group that existing mini-excavator uses generally has an accumulator, and pilot pressure is stored during its work
In accumulator, it can be operated in engine stop and security solenoid valve has and temporarily provides pressure to pilot circuit in the state of signal
Power, so that digging machine major loop pressure release, machine is in a safe condition when the digging machine is not worked, and also provides peace for maintenance fluid pressure line
All risk insurance hinders.The pipeline being connected with accumulator is generally equipped with check valve, and the position of check valve is generally close in pilot control valve group
After interior pressure-reducing valve, before each standby hydraulic fluid port.And guiding valve is substantially belonged to the valve group that each standby hydraulic fluid port is connected, guiding valve is gap
Sealing, inside lets out larger, and energy storage pressure is revealed by guiding valve.Therefore the accumulator dwell time is universal very short, causes accumulator energy
Amount loss, working connection is often seted to be made troubles from pressure release for maintenance, and have potential safety hazard.
The content of the invention
In view of the above-mentioned problems of the prior art, the utility model provides a kind of small type hydraulic excavator guide oil source valve
Group, it can effectively increase the dwell time of pilot control valve group, make working connection pressure release.
The technical solution adopted in the utility model is：
A kind of small type hydraulic excavator pilot control valve group, the pilot control valve group include pressure-reducing valve, pressure measuring tie-in, unidirectional
Valve, accumulator, the first solenoid directional control valve, the second solenoid directional control valve and overflow valve；The oil-out of the check valve is respectively with first
Solenoid directional control valve is connected with accumulator, the oiler of the check valve respectively with pressure-reducing valve, pressure measuring tie-in, overflow valve, second
Solenoid directional control valve is connected.
Preferably, the pilot control valve group also includes filter, and the filter is connected with pressure-reducing valve.
Preferably, 2 mouthfuls of the oil-out of the filter and pressure-reducing valve are connected；1 mouthful of pressure-reducing valve, the 1 of overflow valve
Mouth, the MP interfaces of pressure measuring tie-in, 1 mouthful of check valve, 1 mouthful of the second solenoid directional control valve be interconnected；2 mouthfuls, accumulation of energy of check valve
Device, 1 mouthful of the first solenoid directional control valve be interconnected；3 mouthfuls of pressure-reducing valve, 2 mouthfuls of overflow valve, 3 mouthfuls of the second solenoid directional control valve,
3 mouthfuls of one solenoid directional control valve are interconnected.
Preferably, the pilot control valve group is provided with P interfaces, T interfaces, A interfaces, B interface and each standby hydraulic fluid port；It is each standby
It is connected with 1 mouthful of hydraulic fluid port and check valve；The oiler of P interfaces and filter connects；2 mouthfuls of connections of T interfaces and overflow valve；A
2 mouthfuls of interface and the second solenoid directional control valve are connected；2 mouthfuls of B interface and the first solenoid directional control valve are connected.
Preferably, each standby hydraulic fluid port is standby hydraulic fluid port I and standby hydraulic fluid port II.
Preferably, A interfaces are connected further through center steering body with running motor；B interface is connected with pilot handle again；T
Interface is connected with fuel tank again；Each standby hydraulic fluid port is connected with other valve blocks for needing pilot pressure again.
A kind of small type hydraulic excavator, including foregoing pilot control valve group.
The utility model beneficial effect：
Before check valve is placed in accumulator and the first solenoid directional control valve by the utility model, remaining all valve group element hydraulic fluid port
Afterwards；During digging machine working connection not pressure release, the pressure of accumulator storage will not pass through remaining hydraulic fluid port due to the pressure maintaining effect of check valve
Leakage, when pressure release, engine stop operating and in the state of security solenoid valve has signal is let out by the first solenoid directional control valve
Pressure, effectively increase the dwell time of pilot control valve group, be more convenient maintenance, reduce potential safety hazard.
Brief description of the drawings
Fig. 1 is hydraulic principle schematic diagram of the present utility model；
In figure：10th, filter, 20, pressure-reducing valve, 30, pressure measuring tie-in, 40, check valve, 50, accumulator, the 60, first electromagnetism
Reversal valve, the 70, second solenoid directional control valve, 80, overflow valve.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described by specific embodiment.
As shown in figure 1, a kind of small type hydraulic excavator pilot control valve group, the pilot control valve group include filter 10,
Pressure-reducing valve 20, pressure measuring tie-in 30, check valve 40, accumulator 50, the first solenoid directional control valve 60, the second solenoid directional control valve 70 and overflow
Valve 80 and provided with P interfaces, T interfaces, A interfaces, B interface, MP interfaces, standby hydraulic fluid port I and standby hydraulic fluid port II.
P interfaces are connected with the oiler of filter 10；2 mouthfuls of the oil-out of filter 10 and pressure-reducing valve 20 are connected；Subtract
1 mouthful of pressure valve 20,1 mouthful of overflow valve 80, the MP interfaces of pressure measuring tie-in 30, standby hydraulic fluid port I and standby hydraulic fluid port II, check valve 40
1 mouthful, 1 mouthful of the second solenoid directional control valve 70 is interconnected；2 mouthfuls of check valve 40, accumulator, 1 mouthful of the first solenoid directional control valve 60
It is interconnected；3 mouthfuls of pressure-reducing valve 20,2 mouthfuls of overflow valve 80,3 mouthfuls of the second solenoid directional control valve 70, first solenoid directional control valve 60
3 mouthfuls are interconnected；2 mouthfuls of T interfaces and overflow valve 80 are connected；2 mouthfuls of A interfaces and the second solenoid directional control valve 70 are connected；B interface with
2 mouthfuls of connections of the first solenoid directional control valve 60.
Before check valve 40 is placed in the solenoid directional control valve 60 of accumulator 50 and first by the utility model, remaining all valve group member
After part hydraulic fluid port.The course of work is：During digging machine working connection not pressure release, the pressure that accumulator 50 stores is due to the pressurize of check valve 40
Effect, will not be revealed by remaining hydraulic fluid port, when pressure release, engine stop operating and in the state of security solenoid valve has signal,
By the pressure release of the first solenoid directional control valve 60, effectively increase the dwell time of pilot control valve group, be more convenient maintenance, reduce peace
Full hidden danger.
A kind of small type hydraulic excavator, including pilot control valve group, the pilot control valve group include filter 10, pressure-reducing valve
20th, pressure measuring tie-in 30, check valve 40, accumulator 50, the first solenoid directional control valve 60, the second solenoid directional control valve 70 and overflow valve 80 with
And provided with P interfaces, T interfaces, A interfaces, B interface, MP interfaces, standby hydraulic fluid port I and standby hydraulic fluid port II.
P interfaces are connected with the oiler of filter 10；2 mouthfuls of the oil-out of filter 10 and pressure-reducing valve 20 are connected；Subtract
1 mouthful of pressure valve 20,1 mouthful of overflow valve 80, the MP interfaces of pressure measuring tie-in 30, standby hydraulic fluid port I and standby hydraulic fluid port II, check valve 40
1 mouthful, 1 mouthful of the second solenoid directional control valve 70 is interconnected；2 mouthfuls of check valve 40, accumulator, 1 mouthful of the first solenoid directional control valve 60
It is interconnected；3 mouthfuls of pressure-reducing valve 20,2 mouthfuls of overflow valve 80,3 mouthfuls of the second solenoid directional control valve 70, first solenoid directional control valve 60
3 mouthfuls are interconnected；2 mouthfuls of T interfaces and overflow valve 80 are connected；2 mouthfuls of A interfaces and the second solenoid directional control valve 70 are connected；B interface with
2 mouthfuls of connections of the first solenoid directional control valve 60.
A interfaces are connected further through center steering body with running motor, the first solenoid directional control valve 60 it is electric under the premise of, by the
The presence or absence of two solenoid directional control valves 70 electromagnetic signal switches high low speed walking；B interface is connected with pilot handle, when the first electromagnetic switch
When valve 60 obtains electric, 1 mouthful therein communicates with 2 mouthfuls, and for pilot pressure oil by pilot handle, control bound respectively joins valve element, realizes choosing
The action selected；If guide is increased to overflow valve pressure load pressure moment, overflow valve 80 is opened, the direct oil return box of pressure oil,
Protect pilot system.T interfaces are connected with fuel tank.Each standby hydraulic fluid port needs the valve block of pilot pressure to be connected with other.
Pressure oil is entered by P interfaces when digging machine works, and guide oil is gone to after filter 10 filters and pressure-reducing valve 20 depressurizes
Each hydraulic fluid port of source valve group, accumulator 50 absorb the pressure of guide's working oil, the impact in simultaneous buffering loop, due to check valve 40
Cut-off effect, the pressure of accumulator 50 will not pass through A interfaces and the connected guiding valve leakage loss of each standby hydraulic fluid port.When digging machine needs
Repair, or when the long period does not work, digging machine working connection needs pressure release, is operated in engine stop, the first electromagnetic switch
Valve 60 it is electric in the state of, i.e., 1 mouthful communicates with 2 mouthfuls, manipulates pilot handle and carries out each action, the pressure of the storage of accumulator 50 passes through
1 mouthful and 2 mouthfuls of first solenoid directional control valve 60, by pilot handle, so as to which control bound respectively joins valve element, make the pressure of working line
Oil is let out to fuel tank.Wherein check valve 40 is in before the solenoid directional control valve 60 of accumulator 50 and first, in pilot control valve group remaining
After the hydraulic fluid port of all elements, the pressure of accumulator 50 is effectively protected, extends its dwell time.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and deformation can also be made, these change
Enter and deform and also should be regarded as the scope of protection of the utility model.
Claims (7)
1. a kind of small type hydraulic excavator pilot control valve group, the pilot control valve group includes pressure-reducing valve（20）, pressure measuring tie-in
（30）, check valve（40）, accumulator（50）, the first solenoid directional control valve（60）, the second solenoid directional control valve（70）And overflow valve（80）；
It is characterized in that：
The check valve（40）Oil-out respectively with the first solenoid directional control valve（60）And accumulator（50）It is connected, it is described unidirectional
Valve（40）Oiler respectively with pressure-reducing valve（20）, pressure measuring tie-in（30）, overflow valve（80）, the second solenoid directional control valve（70）It is connected
It is logical.
A kind of 2. small type hydraulic excavator pilot control valve group according to claim 1, it is characterised in that：The pilot control
Valve group also includes filter（10）, the filter（10）With pressure-reducing valve（20）It is connected.
A kind of 3. small type hydraulic excavator pilot control valve group according to claim 2, it is characterised in that：The filter
（10）Oil-out and pressure-reducing valve（20）2 mouthfuls be connected；Pressure-reducing valve（20）1 mouthful, overflow valve（80）1 mouthful, pressure measuring tie-in
（30）MP interfaces, check valve（40）1 mouthful, the second solenoid directional control valve（70）1 mouthful be interconnected；Check valve（40）2 mouthfuls,
Accumulator, the first solenoid directional control valve（60）1 mouthful be interconnected；Pressure-reducing valve（20）3 mouthfuls, overflow valve（80）2 mouthfuls, second electricity
Magnetic reversal valve（70）3 mouthfuls, the first solenoid directional control valve（60）3 mouthfuls be interconnected.
A kind of 4. small type hydraulic excavator pilot control valve group according to claim 3, it is characterised in that：
The pilot control valve group is provided with P interfaces, T interfaces, A interfaces, B interface and each standby hydraulic fluid port；
Each standby hydraulic fluid port and check valve（40）1 mouthful be connected；P interfaces and filter（10）Oiler connection；T interfaces are with overflowing
Flow valve（80）2 mouthfuls connection；A interfaces and the second solenoid directional control valve（70）2 mouthfuls connection；B interface and the first solenoid directional control valve
（60）2 mouthfuls connection.
A kind of 5. small type hydraulic excavator pilot control valve group according to claim 4, it is characterised in that：Each standby hydraulic fluid port
For standby hydraulic fluid port I and standby hydraulic fluid port II.
A kind of 6. small type hydraulic excavator pilot control valve group according to claim 4, it is characterised in that：A interfaces lead to again
Center steering body is crossed with running motor to be connected；B interface is connected with pilot handle again；T interfaces are connected with fuel tank again.
A kind of 7. small type hydraulic excavator, it is characterised in that：Including the pilot control valve group described in any one of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720764588.7U CN207047941U (en) | 2017-06-28 | 2017-06-28 | A kind of small type hydraulic excavator pilot control valve group and small type hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720764588.7U CN207047941U (en) | 2017-06-28 | 2017-06-28 | A kind of small type hydraulic excavator pilot control valve group and small type hydraulic excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207047941U true CN207047941U (en) | 2018-02-27 |
Family
ID=61494338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720764588.7U Active CN207047941U (en) | 2017-06-28 | 2017-06-28 | A kind of small type hydraulic excavator pilot control valve group and small type hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207047941U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513472A (en) * | 2019-09-24 | 2019-11-29 | 洛阳智能农业装备研究院有限公司 | A kind of agricultural machinery automatic transmission control oil sources block |
| CN114198354A (en) * | 2021-11-30 | 2022-03-18 | 湖南三一中型起重机械有限公司 | Pilot control system, integrated valve block, and work machine |
-
2017
- 2017-06-28 CN CN201720764588.7U patent/CN207047941U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513472A (en) * | 2019-09-24 | 2019-11-29 | 洛阳智能农业装备研究院有限公司 | A kind of agricultural machinery automatic transmission control oil sources block |
| CN114198354A (en) * | 2021-11-30 | 2022-03-18 | 湖南三一中型起重机械有限公司 | Pilot control system, integrated valve block, and work machine |
| WO2023097882A1 (en) * | 2021-11-30 | 2023-06-08 | 湖南三一中型起重机械有限公司 | Pilot control system, integrated valve block and operation machine |
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