CN204299995U - Oil passage switching hydraulic circuit and switching control oil passage of working device, and excavator - Google Patents
Oil passage switching hydraulic circuit and switching control oil passage of working device, and excavator Download PDFInfo
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- CN204299995U CN204299995U CN201420733978.4U CN201420733978U CN204299995U CN 204299995 U CN204299995 U CN 204299995U CN 201420733978 U CN201420733978 U CN 201420733978U CN 204299995 U CN204299995 U CN 204299995U
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Abstract
The utility model discloses an oil circuit switching hydraulic circuit and switching control oil circuit, excavator of operation device. The oil circuit switching hydraulic circuit comprises a reversing valve and a control valve, in a first working state of the control valve, a second oil port of the control valve is communicated with a first oil return port, and a valve core of the reversing valve is located at a first position; in a second working state of the control valve, the first oil port and the second oil port of the control valve are communicated, and meanwhile, the valve core of the reversing valve is located at the first position or the second position. The oil circuit switching hydraulic circuit can realize quick switching of oil circuits suitable for different operation devices, meets actual construction requirements, and avoids pollution of a hydraulic system of the whole machine.
Description
Technical Field
The utility model relates to an engineering machine tool's operation technical field specifically, relates to an oil circuit switching hydraulic circuit of operation device, an operation device's switching control oil circuit and an excavator.
Background
When a construction machine such as an excavator is used for construction work, it is often necessary to replace different working devices such as a breaking hammer and a hydraulic shear to perform work of different needs due to the requirement of the construction work and the complexity of a work object.
At present, the high-pressure oil circuit of the existing excavator is not fully developed and designed, so that the high-pressure oil circuit of the excavator is only adapted to a single operation device, and one operation device is often only provided with a special operation device oil circuit, when another operation device needs to be replaced in construction, the corresponding operation device oil circuit needs to be redesigned to temporarily increase or replace, so that the operation process of a construction site is complicated, and time and labor are wasted. In addition, because the construction site has a severe environment and more dust, when the oil way of the operation device is replaced, the hydraulic system of the whole machine is easily polluted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an oil circuit switching hydraulic circuit of operation device, this oil circuit switching hydraulic circuit can realize being applicable to the fast switch over of the oil circuit of different operation devices, satisfies actual construction demand to avoid complete machine hydraulic system's pollution.
In order to achieve the above object, the present invention provides an oil circuit switching hydraulic circuit of an operating device, including a directional control valve and a control valve, wherein the control valve has a first oil port, a second oil port for communicating with a first oil end of the operating device, and a first oil return port for communicating with an oil return device; the reversing valve is provided with an oil inlet communicated with an oil supply device, a second oil return port communicated with the oil return device, a third oil port communicated with a second oil end of the operation device and a fourth oil port communicated with the first oil port of the control valve; when the valve core of the reversing valve is located at the first position, the oil inlet is communicated with the third oil port, and the second oil return port is communicated with the fourth oil port; when the valve core of the reversing valve is located at a second position, the oil inlet is communicated with the fourth oil port, and the second oil return port is communicated with the third oil port; when the valve core of the reversing valve is positioned at the middle position, the oil inlet and the second oil return port are both cut off; in a first working state of the control valve, the second oil port is communicated with the first oil return port, and meanwhile, the valve core of the reversing valve is located at the first position; in a second working state of the control valve, the first oil port is communicated with the second oil port, and meanwhile, the valve core of the reversing valve is located at the first position or the second position.
Through the technical scheme, the following working oil way can be formed:
when the control valve is in a first working state, the second oil port is communicated with the first oil return port, and the reversing valve is in a first position, so that a single-way high-pressure oil way of an oil supply device, an oil inlet, a third oil port, an operation device, the second oil port, the first oil return port and an oil return device can be formed;
when the control valve is in a second working state, the first oil port is communicated with the second oil port, and the reversing valve is in a first position to form a high-pressure oil path of an oil supply device, namely an oil inlet, a third oil port, another operation device, a second oil port, a first oil port, a fourth oil port, a second oil return port and an oil return device; or, the reversing valve is switched from the first position to the second position to form another high-pressure oil path of the oil supply device, the oil inlet, the fourth oil port, the first oil port, the second oil port, the other operation device, the third oil port, the second oil return port and the oil return device, that is, when the control valve is in the second working state, the valve core of the reversing valve is switched between the first position and the second position, and the two high-pressure oil paths can be formed.
Therefore, the oil circuit switching hydraulic circuit can quickly switch and select the oil circuit corresponding to the operation device according to different operation devices so as to meet the actual construction requirement and avoid the pollution of the hydraulic system of the whole machine.
Preferably, the control valve is an electromagnetic valve, and a control end of the electromagnetic valve is connected with a control switch, and the control switch controls the switching between the first working state and the second working state of the electromagnetic valve.
Preferably, a switch ball valve and an overflow valve which are connected in sequence are connected to a pipeline of the third oil port of the reversing valve and used for communicating with the second oil end of the operation device, and an oil outlet of the overflow valve is used for communicating with the oil return device; in a first working state of the control valve, the switch ball valve is closed or opened; and in a second working state of the control valve, the switch ball valve is closed or opened.
Preferably, two control ends of the directional control valve are respectively connected with a first pilot signal oil path and a second pilot signal oil path, and the first pilot signal oil path and the second pilot signal oil path control the switching of the first position and the second position of the spool of the directional control valve.
Furthermore, the oil supply device comprises an oil tank and a variable pump, an oil inlet of the variable pump is communicated with the oil tank, and an oil outlet of the variable pump is communicated with the oil inlet of the reversing valve.
Further, the oil return device is configured as the oil tank.
Further, the variable pump is coaxially connected with a power device and a pilot pump, an oil inlet of the pilot pump is communicated with the oil tank, and an oil outlet of the pilot pump is communicated with a pilot system oil way.
In addition, the utility model provides a switching control oil circuit of operation device, this switching control oil circuit include operation device, oil supply unit, oil return device and above-mentioned oil circuit switching hydraulic circuit, wherein, the first oil end of operation device with the second hydraulic fluid port of control valve communicates, the second oil end of operation device with the third hydraulic fluid port of switching-over valve communicates; the oil supply device is communicated with an oil inlet of the reversing valve; and the oil return device is communicated with the first oil return port of the control valve and the second oil return port of the reversing valve.
Preferably, the working device is a breaking hammer, wherein the control valve is in the first working state, and the valve core of the reversing valve is in the first position; or the working device is a hydraulic shear, wherein the control valve is in the second working state, and simultaneously, the valve core of the reversing valve is in the first position or the second position.
Furthermore, the utility model also provides an excavator, this excavator is provided with above the switching control oil circuit of operation device.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a switching control oil path of a working apparatus according to an embodiment of the present invention, wherein the switching control oil path is connected to an oil path switching hydraulic circuit.
Description of the reference numerals
1-a reversing valve, 2-a control valve, 3-a working device, 4-an oil return device, 5-an oil supply device, 6-a control switch, 7-a switch ball valve, 8-an overflow valve, 9-an oil tank, 10-a variable displacement pump, 11-an oil inlet, 12-a second oil return port, 13-a third oil port, 14-a fourth oil port, 15-a first pilot signal oil path, 16-a second pilot signal oil path, 17-a power device, 18-a pilot pump, 21-a first oil port, 22-a second oil port, 23-a first oil return port, 31-a first oil port and 32-a second oil port.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
As shown in fig. 1, the oil passage switching hydraulic circuit of the working device according to the embodiment of the present invention includes a selector valve 1 and a control valve 2, wherein,
the control valve 2 has a first oil port 21, a second oil port 22 for communicating with a first oil end 31 of the working device 3, and a first oil return port 23 for communicating with the oil return device 4; and
the reversing valve 1 is provided with an oil inlet 11 communicated with the oil supply device 5, a second oil return port 12 communicated with the oil return device 4, a third oil port 13 communicated with a second oil end 32 of the working device 3 and a fourth oil port 14 communicated with a first oil port 21 of the control valve 2; when the valve core of the reversing valve 1 is at the first position, the oil inlet 11 is communicated with the third oil port 13, and the second oil return port 12 is communicated with the fourth oil port 14; when the valve core of the reversing valve 1 is at the second position, the oil inlet 11 is communicated with the fourth oil port 14, and the second oil return port 12 is communicated with the third oil port 13; when the valve core of the reversing valve 1 is positioned at the middle position, the oil inlet 11 and the second oil return port 12 are both cut off;
in a first working state of the control valve 2, the second oil port 22 is communicated with the first oil return port 23, and the valve core of the reversing valve 1 is at a first position; in the second working state of the control valve 2, the first oil port 21 and the second oil port 22 are communicated, and the spool of the directional valve 1 is in the first position or the second position.
Thus, the following working oil passages can be formed:
when the control valve is in a first working state, the second oil port 22 is communicated with the first oil return port 23, and the reversing valve is in a first position, so that a single-way high-pressure oil way of the oil supply device 5, the oil inlet 11, the third oil port 13, the operation device 3, the second oil port 22, the first oil return port 23 and the oil return device 4 can be formed;
when the control valve is in a second working state, the first oil port 21 is communicated with the second oil port 22, and the reversing valve is in a first position to form a high-pressure oil path of the oil supply device 5, the oil inlet 11, the third oil port 13, the other operation device 3, the second oil port 22, the first oil port 21, the fourth oil port 14, the second oil return port 12 and the oil return device 4; or, the reversing valve is switched from the first position to the second position to form another high-pressure oil path of the oil supply device 5, the oil inlet 11, the fourth oil port 14, the first oil port 21, the second oil port 22, the other working device 3, the third oil port 13, the second oil return port 12 and the oil return device 4, that is, when the control valve is in the second working state, the valve core of the reversing valve is switched between the first position and the second position, so that the two high-pressure oil paths can be formed.
Therefore, the utility model discloses an oil circuit switches hydraulic circuit can be according to the operation device of difference, and the corresponding working oil circuit of selection and operation device is switched fast to satisfy actual construction demand, and avoid complete machine hydraulic system's pollution.
The utility model discloses an among the hydraulic circuit is switched to the oil circuit, the switching of control valve 2 between first operating condition and second operating condition can be realized through multiple mode, for example, control valve 2 can be the pilot operated valve to control the intercommunication of second hydraulic fluid port 22 and first hydraulic fluid port 21 through corresponding oil circuit, perhaps the intercommunication of second hydraulic fluid port 22 and first hydraulic fluid port 23.
Under the prerequisite that realizes basically the same functional effect, in order to reduce manufacturing cost and simplify the pipeline structure of oil circuit switching hydraulic circuit, as shown in fig. 1, in preferred embodiment, the utility model discloses a control valve 2 in the oil circuit switching hydraulic circuit is the solenoid valve, and the control end of this solenoid valve is connected with control switch 6, and control switch 6 controls the conversion of first operating condition and the second operating condition of this solenoid valve.
Preferably, the solenoid valve is configured to be in said first operating condition in the absence of an electrical power supply.
Thus, after the power device such as a motor is started, the control switch is not operated, at this time, the solenoid valve is in the first working state, and the second oil port 22 is communicated with the first oil return port 23 to form the above-mentioned one-way high-pressure oil path; when the control switch is operated to enable the electromagnetic valve to be electrified, the valve core of the electromagnetic valve acts to convert the electromagnetic valve from the first working state to the second working state, so that the first oil port 21 and the second oil port 22 are communicated, and at the moment, the two-way high-pressure oil way can be formed by converting the valve core of the reversing valve 1 between the first position and the second position.
In addition, in order to meet the difference of the maximum working pressures of different working devices 3 and protect the safety and stability of the whole oil circuit switching hydraulic circuit, preferably, as shown in fig. 1, a switching ball valve 7 and an overflow valve 8 which are connected in sequence are connected to a pipeline of the third oil port 13 of the reversing valve 1 and used for communicating with the second oil end 32 of the working device 3, and an oil outlet of the overflow valve 8 is used for communicating with the oil return device 4; wherein, in the first working state of the control valve 2, the switch ball valve 7 is closed or opened; in a second operating state of the control valve 2, the on-off ball valve 7 is closed or opened.
For example, regardless of whether the control valve 2 is in the first operation state or the second operation state, the work implement 3 may secure the maximum operation pressure using a relief valve of its own system in a case where the on-off ball valve 3 is closed. When the work implement 3 does not carry an overflow valve by itself or cannot ensure the maximum working pressure by using an overflow valve by itself, the switching ball valve 3 may be opened to ensure that the work implement 3 can satisfy the maximum working pressure.
In addition, in order to improve the stability and the accuracy of the switching-over of the reversing valve, preferably, the utility model discloses a reversing valve in the oil circuit switching hydraulic circuit is preferably configured as the pilot operated valve, and two control ends of this reversing valve 1 are connected with first pilot signal oil circuit 15 and second pilot signal oil circuit 16 respectively, first pilot signal oil circuit 15 and second pilot signal oil circuit 16 control the case of reversing valve 1 the first position with the conversion of second position.
Furthermore, as shown in fig. 1, in order to improve the capability of the oil supply device 5 to rapidly supply oil to the directional control valve and meet the pressure requirements of the hydraulic oil of different working devices, it is preferable that the oil supply device 5 comprises an oil tank 9 and a variable pump 10, an oil inlet of the variable pump 10 is communicated with the oil tank 9, and an oil outlet of the variable pump 10 is used for being communicated with an oil inlet 11 of the directional control valve 1, so that the variable pump 10 can provide the hydraulic oil of real-time pressure to the hydraulic oil of different working devices 3 according to the pressure requirements of the hydraulic oil.
Further, in order to achieve the rational line structure of the oil passage switching hydraulic circuit and to improve the utilization rate of the oil tank, it is preferable that the oil returning device 4 be configured as the oil tank 9.
In order to improve the utilization rate of the system control circuit of the construction machine to which the oil passage switching hydraulic circuit is applied, it is preferable that, as shown in fig. 1, the power unit 17 and the pilot pump 18 are coaxially connected to the variable displacement pump 10, an oil inlet of the pilot pump 18 is communicated with the oil tank 9, and an oil outlet of the pilot pump 18 is used to communicate with a pilot system oil passage of the construction machine, for example, a pilot system oil passage of a swing motor. Preferably, the power means 17 is an electric motor.
On the basis, the utility model provides a switching control oil circuit of a working device, as shown in figure 1, which comprises a working device 3, an oil supply device 5, an oil return device 4 and the oil circuit switching hydraulic circuit, wherein,
the first oil end 31 of the working device 3 is communicated with the second oil port 22 of the control valve 2, and the second oil end 32 of the working device 3 is communicated with the third oil port 13 of the reversing valve 1;
the oil supply device 5 is communicated with an oil inlet 11 of the reversing valve 1;
the oil return device 4 is communicated with the first oil return port 23 of the control valve 2 and the second oil return port 12 of the reversing valve 1.
Thus, the switching control oil path can provide a working oil path satisfying different working devices.
Further, in a specific application, the working device 3 is a breaking hammer, wherein the control valve 2 is in a first working state, and the spool of the reversing valve 1 is in a first position, so that a one-way high-pressure oil path of the oil supply device 5, the oil inlet 11, the third oil port 13, the oil inlet of the breaking hammer, the oil outlet of the breaking hammer, the second oil port 22, the first oil return port 23 and the oil return device 4 can be formed, and in the case that the on-off ball valve 7 and the overflow valve 8 are included, the on-off ball valve 7 can be closed because the breaking hammer can ensure the maximum working pressure by using the overflow valve of the system of the breaking hammer;
or,
in another specific application, the working device 3 is a hydraulic shear, wherein the control valve is in a second working state, and simultaneously, the valve core of the reversing valve 1 is in a first position to form a high-pressure oil path of the oil supply device 5, the oil inlet 11, the third oil port 13, the oil inlet of the large cavity of the hydraulic shear cylinder, the oil outlet of the small cavity of the hydraulic shear cylinder, the second oil port 22, the first oil port 21, the fourth oil port 14, the second oil return port 12 and the oil return device 4; or, the reversing valve is switched from the first position to the second position to form another high-pressure oil path of the oil supply device 5, namely the oil inlet 11, the fourth oil port 14, the first oil port 21, the second oil port 22, the hydraulic shearing cylinder small cavity oil inlet, the hydraulic shearing cylinder large cavity oil outlet, the third oil port 13, the second oil return port 12 and the oil return device 4, namely, when the control valve is in the second working state, the valve core of the reversing valve is switched between the first position and the second position, and the two high-pressure oil paths can be formed. In the two-way high-pressure oil way, under the condition of having the switch ball valve 7 and the overflow valve 8, the ball opening ball valve 7 can be opened so as to protect the large cavity of the hydraulic shear oil cylinder and ensure the maximum working pressure of the hydraulic shear.
Furthermore, the utility model also provides an excavator, this excavator is provided with above the switching control oil circuit of operation device. Therefore, the excavator can replace the corresponding working device according to different working conditions in construction, and quickly provide a proper working oil way for the working device.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (10)
1. An oil circuit switching hydraulic circuit of an operation device is characterized by comprising a reversing valve (1) and a control valve (2),
the control valve (2) is provided with a first oil port (21), a second oil port (22) communicated with a first oil end (31) of the working device (3), and a first oil return port (23) communicated with the oil return device (4);
the reversing valve (1) is provided with an oil inlet (11) communicated with an oil supply device (5), a second oil return port (12) communicated with the oil return device (4), a third oil port (13) communicated with a second oil end (32) of the working device (3), and a fourth oil port (14) communicated with the first oil port (21) of the control valve (2);
when the valve core of the reversing valve (1) is located at a first position, the oil inlet (11) is communicated with the third oil port (13), and the second oil return port (12) is communicated with the fourth oil port (14); when the valve core of the reversing valve (1) is located at a second position, the oil inlet (11) is communicated with the fourth oil port (14), and the second oil return port (12) is communicated with the third oil port (13); when the valve core of the reversing valve (1) is positioned at a middle position, the oil inlet (11) and the second oil return port (12) are both cut off;
in a first working state of the control valve (2), the second oil port (22) is communicated with the first oil return port (23), and meanwhile, the valve core of the reversing valve (1) is located at the first position;
in a second working state of the control valve (2), the first oil port (21) is communicated with the second oil port (22), and meanwhile, the valve core of the reversing valve (1) is located at the first position or the second position.
2. The oil circuit switching hydraulic circuit according to claim 1, wherein the control valve (2) is a solenoid valve, and a control switch (6) is connected to a control end of the solenoid valve, and the control switch (6) controls switching between the first operating state and the second operating state of the solenoid valve.
3. The oil circuit switching hydraulic circuit according to claim 1, wherein a pipeline of the third oil port (13) of the reversing valve (1) for communicating with the second oil end (32) of the working device (3) is connected with a switch ball valve (7) and an overflow valve (8) in turn, and an oil outlet of the overflow valve (8) is used for communicating with the oil return device (4);
in a first working state of the control valve (2), the on-off ball valve (7) is closed or opened;
in a second working state of the control valve (2), the on-off ball valve (7) is closed or opened.
4. The oil circuit switching hydraulic circuit according to claim 1, wherein a first pilot signal oil circuit (15) and a second pilot signal oil circuit (16) are connected to both control ends of the selector valve (1), respectively, and the first pilot signal oil circuit (15) and the second pilot signal oil circuit (16) control switching of the first position and the second position of the spool of the selector valve (1).
5. The oil circuit switching hydraulic circuit according to any one of claims 1 to 4, wherein the oil supply device (5) includes an oil tank (9) and a variable pump (10), an oil inlet of the variable pump (10) is communicated with the oil tank (9), and an oil outlet of the variable pump (10) is used for being communicated with the oil inlet (11) of the selector valve (1).
6. Oil circuit switching hydraulic circuit according to claim 5, characterized in that the oil return device (4) is configured as the oil tank (9).
7. The oil circuit switching hydraulic circuit according to claim 5, characterized in that the variable displacement pump (10) is coaxially connected with a power device (17) and a pilot pump (18), an oil inlet of the pilot pump (18) is communicated with the oil tank (9), and an oil outlet of the pilot pump (18) is used for being communicated with a pilot system oil circuit.
8. A switching control oil passage of a working device, characterized by comprising a working device (3), an oil supply device (5), an oil return device (4), and an oil passage switching hydraulic circuit according to any one of claims 1 to 7,
a first oil end (31) of the working device (3) is communicated with a second oil port (22) of the control valve (2), and a second oil end (32) of the working device (3) is communicated with a third oil port (13) of the reversing valve (1);
the oil supply device (5) is communicated with an oil inlet (11) of the reversing valve (1);
the oil return device (4) is communicated with a first oil return port (23) of the control valve (2) and a second oil return port (12) of the reversing valve (1).
9. The switching control circuit according to claim 8, characterized in that the working device (3) is a breaking hammer, wherein the control valve (2) is in the first operating state while the spool of the directional valve (1) is in the first position; or,
the working device (3) is a hydraulic shear, wherein the control valve (2) is in the second working state, and simultaneously, the valve core of the reversing valve (1) is in the first position or the second position.
10. An excavator provided with the switching control oil passage of the working device according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420733978.4U CN204299995U (en) | 2014-11-28 | 2014-11-28 | Oil passage switching hydraulic circuit and switching control oil passage of working device, and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420733978.4U CN204299995U (en) | 2014-11-28 | 2014-11-28 | Oil passage switching hydraulic circuit and switching control oil passage of working device, and excavator |
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| Publication Number | Publication Date |
|---|---|
| CN204299995U true CN204299995U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420733978.4U Expired - Fee Related CN204299995U (en) | 2014-11-28 | 2014-11-28 | Oil passage switching hydraulic circuit and switching control oil passage of working device, and excavator |
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| Country | Link |
|---|---|
| CN (1) | CN204299995U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061077A (en) * | 2017-12-11 | 2018-05-22 | 广州瑞立科密汽车电子股份有限公司 | Hydraulic controller dynamic analog detects oil-way switching apparatus |
| CN112483645A (en) * | 2020-11-20 | 2021-03-12 | 三一汽车制造有限公司 | Hydraulic control system for clutch transfer case and engineering mechanical equipment |
-
2014
- 2014-11-28 CN CN201420733978.4U patent/CN204299995U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061077A (en) * | 2017-12-11 | 2018-05-22 | 广州瑞立科密汽车电子股份有限公司 | Hydraulic controller dynamic analog detects oil-way switching apparatus |
| CN108061077B (en) * | 2017-12-11 | 2023-08-01 | 广州瑞立科密汽车电子股份有限公司 | Hydraulic controller dynamic simulation detection oil circuit switching device |
| CN112483645A (en) * | 2020-11-20 | 2021-03-12 | 三一汽车制造有限公司 | Hydraulic control system for clutch transfer case and engineering mechanical equipment |
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| CF01 | Termination of patent right due to non-payment of annual fee |