CN219795713U - Compound hydraulic control system of breaking hammer and tunnel construction equipment - Google Patents
Compound hydraulic control system of breaking hammer and tunnel construction equipment Download PDFInfo
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- CN219795713U CN219795713U CN202320294172.9U CN202320294172U CN219795713U CN 219795713 U CN219795713 U CN 219795713U CN 202320294172 U CN202320294172 U CN 202320294172U CN 219795713 U CN219795713 U CN 219795713U
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- 238000010276 construction Methods 0.000 title claims abstract description 15
- 150000001875 compounds Chemical class 0.000 title claims description 18
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 13
- 239000011435 rock Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 128
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a composite hydraulic control system of a breaking hammer and tunnel construction equipment, wherein when the composite hydraulic control system executes breaking action, a controller firstly controls an enabling valve to be electrified to cut off the enabling valve so as to load a first main pump and a second main pump, then controls a first electric proportional reducing valve to be electrified to enable a proportional direction valve to be switched to a left position, at the moment, oil is returned from an oil inlet A port and an oil return port B port of a breaking hammer motor, meanwhile, pressure oil is conveyed to a pilot port of a hydraulic control reversing valve so as to enable the pilot port to be in reversing connection with an oil path between an LS port and an electric proportional overflow valve, then a pressure sensor is used for detecting the pressure value of the A port of the breaking hammer motor, and the overflow pressure of the electric proportional overflow valve is controlled to be a corresponding fixed value so as to enable the hydraulic system to be switched from a load sensitive control mode to a constant pressure mode, thus the breaking action can stably run under any rock stratum condition, and the construction efficiency is greatly improved.
Description
Technical Field
The utility model relates to the technical field of hydraulic systems of breaking hammers, in particular to a composite hydraulic control system of a breaking hammer, and in addition, the utility model particularly relates to tunnel construction equipment adopting the composite hydraulic control system.
Background
The breaking hammer is used as a common excavation tool of tunnel construction equipment, and the working performance of the breaking hammer determines the tunnel construction efficiency to a great extent. At present, a hydraulic system of the breaking hammer generally adopts a load sensitive hydraulic control system, and can adapt to rock layer operations with different hardness. However, in the working process of the soft rock stratum, the stability of the breaking hammer in working is reduced due to large load change, so that the breaking action cannot be stably operated.
Disclosure of Invention
The utility model provides a composite hydraulic control system of a breaking hammer and tunnel construction equipment, which are used for solving the technical problem that the breaking action of the conventional hydraulic control system of the breaking hammer cannot stably run.
According to one aspect of the utility model, a compound hydraulic control system of a breaking hammer is provided, which comprises an oil tank, a first main pump, a second main pump, a pilot pump, an electric proportional overflow valve, an enabling valve, a hydraulic control reversing valve, a first electric proportional pressure reducing valve, a proportional direction valve, a shuttle valve, a controller and a pressure sensor, wherein oil inlets of the first main pump, the second main pump and the pilot pump are all connected with the oil tank, one path of pressure oil provided by the first main pump and the second main pump is output to a T port of the proportional direction valve after being converged, the other path of pressure oil flows back to the oil tank through the enabling valve, an A port and a B port of the proportional direction valve are respectively connected with an A port and a B port of a breaking hammer motor, a P port of the proportional direction valve is connected with the oil tank through the first electric proportional pressure reducing valve, an oil outlet of the pilot pump is connected with an oil port of the first electric proportional pressure reducing valve, an A port of the hydraulic control reversing valve is simultaneously connected with an A port of the breaking hammer motor and a P port of the hydraulic control reversing valve, and the hydraulic control reversing valve is used for detecting the pressure of the hydraulic control reversing valve is connected with the first electric proportional reversing valve and the pilot valve;
when the crushing action is executed, the controller firstly controls the enabling valve to be electrified so as to load the first main pump and the second main pump, then controls the first electric proportional pressure reducing valve to be electrified so as to enable the proportional direction valve to be switched to the left position, at the moment, oil is returned from the inlet A of the crushing hammer motor and the inlet B of the crushing hammer motor, meanwhile, pressure oil is output to the pilot port of the hydraulic control reversing valve so as to conduct reversing, the pressure value of the inlet A of the crushing hammer motor is detected through the pressure sensor, and the overflow pressure of the electric proportional overflow valve is controlled to be a fixed value so that the hydraulic system is in a constant pressure state.
Further, the hydraulic fluid pump further comprises a first overflow valve and a balance valve, wherein the first overflow valve is respectively connected with an A port and a B port of the breaking hammer motor, a working oil port of the balance valve is respectively connected with the breaking hammer motor, the B port of the proportional direction valve and the first overflow valve, a pilot oil port of the balance valve is also connected with the A port of the breaking hammer motor, when breaking action is stopped, the A port of the breaking hammer motor stops oil inlet, pilot control pressure of the balance valve is zero and is switched to a closed state, the B port of the breaking hammer motor is changed into a high-pressure side under inertial traction, and oil is replenished to the A port of the breaking hammer motor through the first overflow valve.
Further, the hydraulic oil system further comprises a first pressure maintaining balance valve group, a third pressure maintaining balance valve group, a second electric proportional pressure reducing valve and a fourth electric proportional pressure reducing valve, wherein pilot oil ports of the second electric proportional pressure reducing valve and the fourth electric proportional pressure reducing valve are connected with a pilot pump, working oil ports of the first pressure maintaining balance valve group are respectively connected with a rod cavity and an oil tank of a breaking hammer feeding oil cylinder, working oil ports of the third pressure maintaining balance valve group are respectively connected with rodless cavities of the breaking hammer feeding oil cylinder, oil outlets of the first main pump and the second main pump, the second electric proportional pressure reducing valve is connected with a control oil port of the first pressure maintaining balance valve group, the fourth electric proportional pressure reducing valve is connected with a control oil port of the third pressure maintaining balance valve group, when the second electric proportional pressure reducing valve and the fourth electric proportional pressure reducing valve are controlled to be powered on, the first pressure maintaining balance valve group and the third pressure maintaining balance valve group are conducted, oil inlets of the rodless cavities of the breaking hammer feeding oil cylinder, oil inlets of the rod cavities are powered, and the oil cylinders extend.
Further, the hydraulic control system further comprises a second pressure maintaining balance valve bank, a fourth pressure maintaining balance valve bank, a third electric proportional pressure reducing valve and a fifth electric proportional pressure reducing valve, pilot oil ports of the third electric proportional pressure reducing valve and the fifth electric proportional pressure reducing valve are connected with a pilot pump, working oil ports of the second pressure maintaining balance valve bank are respectively connected with a rodless cavity and an oil tank of a breaking hammer feeding oil cylinder, working oil ports of the fourth pressure maintaining balance valve bank are respectively connected with oil outlets of a rod cavity, a first main pump and a second main pump of the breaking hammer feeding oil cylinder, the third electric proportional pressure reducing valve is connected with a control oil port of the second pressure maintaining balance valve bank, the fifth electric proportional pressure reducing valve is connected with a control oil port of the fourth pressure maintaining balance valve bank, when the third electric proportional pressure reducing valve and the fifth electric proportional pressure reducing valve are controlled to be powered on, the rod cavity oil inlets and the rodless cavity oil inlets of the breaking hammer feeding oil cylinder are powered on, and the oil cylinders retract.
Further, each pressure maintaining balance valve group comprises at least two pressure maintaining balance valves.
Further, a right control oil port of the proportional direction valve is connected to the oil tank through a sixth electric proportional pressure reducing valve, the sixth electric proportional pressure reducing valve is electrically connected with the controller, when the sixth electric proportional pressure reducing valve is powered on, the proportional direction valve is switched to the right position, and at the moment, oil is fed into the oil inlet B and oil is fed into the oil return inlet A of the breaking hammer motor.
Further, the hydraulic control system further comprises a second relief valve arranged on a bypass pipeline of the pilot pump and used for controlling the pressure of the pilot oil way.
Further, both ports a and B of the breaking hammer motor are connected to the oil tank through a safety valve.
Further, the controller is in communication connection with the remote controller, and remote control is performed through the remote controller.
In addition, the utility model also provides tunnel construction equipment, and a composite hydraulic control system adopting the breaking hammer.
The utility model has the following effects:
when the composite hydraulic control system of the breaking hammer disclosed by the utility model is used for executing breaking action, the controller is used for controlling the enabling valve to be electrified firstly, so that the enabling valve is cut off, the first main pump and the second main pump are loaded, then controlling the first electric proportional pressure reducing valve to be electrified, so that the proportional direction valve is switched to the left position, at the moment, oil is returned from the oil inlet A and the oil inlet B of the breaking hammer motor, meanwhile, pressure oil is conveyed to the pilot port of the hydraulic control reversing valve, so that the oil way between the LS port and the electric proportional overflow valve is reversed and conducted, the pressure sensor is used for detecting the pressure value of the oil inlet A of the breaking hammer motor, and the overflow pressure of the electric proportional overflow valve is controlled to be a corresponding fixed value, so that the hydraulic system is switched from a load-sensitive control mode to a constant pressure mode, and the breaking action can stably run under any rock stratum condition, and the construction efficiency is greatly improved.
In addition, the tunnel construction equipment of the present utility model also has the above-described advantages.
In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 is a schematic hydraulic principle view of a compound hydraulic control system of a breaking hammer according to a preferred embodiment of the present utility model.
Description of the reference numerals
1. An oil tank; 2. a first main pump; 3. a second main pump; 4. a pilot pump; 5. an electric proportional overflow valve; 6. enabling the valve; 7. a hydraulically controlled reversing valve; 8. a first electro proportional pressure reducing valve; 9. a sixth electro-proportional pressure reducing valve; 10. a proportional directional valve; 11. a shuttle valve; 12. a controller; 13. a pressure sensor; 14. a first overflow valve; 15. a balancing valve; 16. a first pressure-maintaining balance valve group; 17. the second pressure maintaining balance valve group; 18. a third pressure maintaining balance valve group; 19. a fourth pressure maintaining balance valve group; 20. a second electro proportional pressure reducing valve; 21. a third electro proportional pressure reducing valve; 22. a fourth electro proportional pressure reducing valve; 23. a fifth electro proportional pressure reducing valve; 24. a second overflow valve; 25. a safety valve; 26. a first throttle; 27. a second restrictor; 100. a breaking hammer motor; 200. and a breaking hammer feeding oil cylinder.
Detailed Description
Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.
It will be appreciated that, as shown in fig. 1, the preferred embodiment of the present utility model provides a compound hydraulic control system of a breaking hammer, which includes an oil tank 1, a first main pump 2, a second main pump 3, a pilot pump 4, an electric proportional relief valve 5, an enabling valve 6, a pilot operated directional valve 7, a first electric proportional reducing valve 8, a proportional directional valve 10, a shuttle valve 11, a controller 12 and a pressure sensor 13, wherein oil inlets of the first main pump 2, the second main pump 3 and the pilot pump 4 are all connected with the oil tank 1, the first main pump 2 and the second main pump 3 provide a power oil source, the pilot pump 4 provides a pilot control oil source, one path of pressure oil provided by the first main pump 2 and the second main pump 3 is output to a T port of the proportional directional valve 10 after being combined, and the other path of pressure oil flows back to the oil tank 1 through the enabling valve 6. Wherein the enabling valve 6 is in an on state when not energized, the first main pump 2 and the second main pump 3 are not loaded. The port A and the port B of the proportional direction valve 10 are respectively connected with the port A and the port B of the breaking hammer motor 100, the port P of the proportional direction valve 10 is connected with the oil tank 1, and the left control oil port of the proportional direction valve 10 is connected with the oil tank 1 through the first electric proportional pressure reducing valve 8. When the first electric proportional reducing valve 8 is subjected to electric proportional loading, the proportional direction valve 10 is switched to the left position, and oil is fed into the port A and returned from the port B of the breaking hammer motor 100. The oil outlet of the pilot pump 4 is connected with the pilot oil port of the first electro-proportional pressure reducing valve 8, the shuttle valve 11 is simultaneously connected with the port A and the port B of the breaking hammer motor 100, the feedback oil ports of the first main pump 2 and the second main pump 3 and the port P of the hydraulic control reversing valve 7, and the shuttle valve 11 selects the A, B port high pressure of the breaking hammer motor 100 and feeds back the high pressure to the feedback oil ports of the first main pump 2 and the second main pump 3, so that the load sensitive control is realized. The port A of the hydraulic control reversing valve 7 is connected to the oil tank 1 through the electric proportional overflow valve 5, the port A of the proportional direction valve 10 is also connected with the pilot port of the hydraulic control reversing valve 7, when the port A of the breaking hammer motor 100 does not feed oil, the hydraulic control reversing valve 7 is not conducted, when the port A of the breaking hammer motor 100 feeds oil, the oil is conveyed to the pilot port of the hydraulic control reversing valve 7 to be reversed, and an oil way between the LS port and the electric proportional overflow valve 5 is conducted. The pressure sensor 13 is used for detecting the pressure of the opening a of the breaking hammer motor 100, and the pressure sensor 13, the first electro-proportional pressure reducing valve 8, the electro-proportional relief valve 5 and the enabling valve 6 are all electrically connected with the controller 12. In addition, a one-way valve is further arranged between the electric proportional overflow valve 5 and the oil inlet of the enabling valve 6, so that pressure oil loaded by the first main pump 2 and the second main pump 3 is prevented from being directly discharged through the electric proportional overflow valve 5. In addition, a check valve is also provided between the oil inlet of the enable valve 6 and the merging port of the first main pump 2 and the second main pump 3, preventing backflow.
It will be appreciated that when the crushing action is performed, the controller 12 firstly controls the enabling valve 6 to be electrified, so that the enabling valve 6 is cut off, so that the first main pump 2 and the second main pump 3 are loaded, then controls the first electric proportional pressure reducing valve 8 to be electrified, so that the proportional directional valve 10 is switched to the left position, at this time, oil is fed into the inlet A and the outlet B of the hammer motor 100 for oil return, meanwhile, pressure oil is conveyed to the pilot port of the hydraulic control reversing valve 7 for reversing and conducting, then the pressure sensor 13 detects the pressure value of the inlet A of the hammer motor 100, and controls the overflow pressure of the electric proportional overflow valve 5 to be a fixed value, so that the hydraulic system is switched from the load sensitive mode to the constant pressure state. Wherein, corresponding to different A mouth pressure values, the electric proportional relief valve 5 has different relief pressure fixed values.
It can be understood that, in the composite hydraulic control system of the breaking hammer of this embodiment, when the breaking action is performed, the controller 12 firstly controls the enabling valve 6 to be electrified, so that the enabling valve 6 is cut off, so that the first main pump 2 and the second main pump 3 are loaded, then controls the first electric proportional reducing valve 8 to be electrified, so that the proportional directional valve 10 is switched to the left position, at this time, the oil is returned from the inlet a and the outlet B of the breaking hammer motor 100, meanwhile, the pressure oil is conveyed to the pilot port of the hydraulic control reversing valve 7, so that the hydraulic control reversing valve reverses the oil path between the inlet LS and the electric proportional overflow valve 5, then the pressure sensor 13 detects the pressure value of the inlet a of the breaking hammer motor 100, and controls the overflow pressure of the electric proportional overflow valve 5 to be a corresponding fixed value, so that the hydraulic system is switched from the load sensitive control mode to the constant pressure mode, so that the breaking action can stably run under any rock stratum condition, and the construction efficiency is greatly improved.
In addition, the compound hydraulic control system further comprises a first overflow valve 14 and a balance valve 15, wherein the first overflow valve 14 is respectively connected with an A port and a B port of the breaking hammer motor 100, the working oil ports of the balance valve 15 are respectively connected with the breaking hammer motor 100, the B port of the proportional direction valve 10 and the first overflow valve 14, and the pilot oil port of the balance valve 15 is also connected with the A port of the breaking hammer motor 100. When the breaking operation is stopped, the inlet a of the breaking hammer motor 100 stops to feed oil, the pilot control pressure of the balance valve 15 is zero, the balance valve 15 is switched to a closed state, the inlet B of the breaking hammer motor 100 is rapidly raised to become a high pressure side under inertial traction, at this time, the first overflow valve 14 is opened, the inlet a (i.e., low pressure side) of the breaking hammer motor 100 is replenished with oil through the first overflow valve 14, suction of the low pressure side is prevented, and the breaking hammer motor 100 is stably stopped under the back pressure of the first overflow valve 14. Alternatively, the breaking hammer motor 100 may be stopped smoothly by controlling the proportional loading of the first electric proportional pressure reducing valve 8.
In addition, the right control oil port of the proportional directional valve 10 is connected to the oil tank 1 through a sixth electric proportional pressure reducing valve 9, the sixth electric proportional pressure reducing valve 9 is electrically connected to the controller 12, and when the sixth electric proportional pressure reducing valve 9 is powered on, the proportional directional valve 10 is switched to the right position, and at this time, oil is fed into the port B and returned into the port a of the breaking hammer motor 100.
In addition, the compound hydraulic control system further comprises a first pressure maintaining balance valve group 16, a third pressure maintaining balance valve group 18, a second electric proportional pressure reducing valve 20 and a fourth electric proportional pressure reducing valve 22, wherein pilot oil ports of the second electric proportional pressure reducing valve 20 and the fourth electric proportional pressure reducing valve 22 are connected with the pilot pump 4, working oil ports of the first pressure maintaining balance valve group 16 are respectively connected with a rod cavity of the breaking hammer feeding oil cylinder 200 and the oil tank 1, working oil ports of the third pressure maintaining balance valve group 18 are respectively connected with oil outlets of a rodless cavity of the breaking hammer feeding oil cylinder 200, the first main pump 2 and the second main pump 3, the second electric proportional pressure reducing valve 20 is connected with control oil ports of the first pressure maintaining balance valve group 16, and the fourth electric proportional pressure reducing valve 22 is connected with the control oil ports of the third pressure maintaining balance valve group 18. The second electro proportional pressure reducing valve 20 and the fourth electro proportional pressure reducing valve 22 are electrically connected to the controller 12. When the second electric proportional pressure reducing valve 20 and the fourth electric proportional pressure reducing valve 22 are controlled to be loaded in proportion, the first pressure maintaining balance valve group 16 and the third pressure maintaining balance valve group 18 are conducted, the rodless cavity of the breaking hammer feeding oil cylinder 200 is used for oil feeding and oil returning, the rod cavity is used for oil returning, the oil cylinder stretches out, so that the hammer head connected with the breaking hammer motor 100 is always propped against a working surface, automatic feeding breaking action is realized, and the stability of the breaking action is further improved.
Optionally, the compound hydraulic control system further includes a second pressure maintaining balance valve group 17, a fourth pressure maintaining balance valve group 19, a third electric proportional pressure reducing valve 21, and a fifth electric proportional pressure reducing valve 23, pilot oil ports of the third electric proportional pressure reducing valve 21 and the fifth electric proportional pressure reducing valve 23 are all connected with the pilot pump 4, working oil ports of the second pressure maintaining balance valve group 17 are respectively connected with a rodless cavity of the breaking hammer feeding cylinder 200 and the oil tank 1, working oil ports of the fourth pressure maintaining balance valve group 19 are respectively connected with oil outlets of the rod cavity of the breaking hammer feeding cylinder 200, the first main pump 2 and the second main pump 3, the third electric proportional pressure reducing valve 21 is connected with a control oil port of the second pressure maintaining balance valve group 17, and the fifth electric proportional pressure reducing valve 23 is connected with a control oil port of the fourth pressure maintaining balance valve group 19. Wherein, the third electric proportional pressure reducing valve 21 and the fifth electric proportional pressure reducing valve 23 are electrically connected with the controller 12. When the third electric proportional pressure reducing valve 21 and the fifth electric proportional pressure reducing valve 23 are controlled to be powered on, the second pressure maintaining balance valve group 17 and the fourth pressure maintaining balance valve group 19 are conducted, the rod cavity of the breaking hammer feeding oil cylinder 200 is used for oil feeding, the rod cavity is not used for oil returning, and the oil cylinder is retracted.
Preferably, each pressure maintaining balance valve group comprises at least two pressure maintaining balance valves so as to meet the requirement of large-flow oil supply of the oil cylinder.
In addition, the compound hydraulic control system further includes a second relief valve 24 provided on the bypass line of the pilot pump 4 for controlling the pilot oil line pressure. In addition, the port a and the port B of the breaking hammer motor 100 are both connected to the oil tank 1 through a safety valve 25, and when the oil inlet pressure of the port a or the port B of the breaking hammer motor 100 exceeds the set pressure value of the safety valve 25, the safety valve 25 is opened to directly discharge oil, thereby further ensuring the safety of the hydraulic system. In addition, both the rod-shaped and rodless chambers of the breaking hammer feed cylinder 200 are also connected to the oil tank 1 through one relief valve 25. In addition, the controller 12 is in communication connection with a remote controller, and is remotely controlled by the remote controller, so that an operator can remotely control the controller, and personal safety is guaranteed. In addition, a first restrictor 26 is arranged between the shuttle valve 11 and the feedback oil port of the first main pump 2, and a second restrictor 27 is arranged between the shuttle valve 11 and the feedback oil port of the second main pump 3, so that the pressure of the feedback loop can be stabilized, and the stability of the constant pressure system is further improved.
In addition, another embodiment of the utility model also provides tunnel construction equipment, preferably a composite hydraulic control system adopting the breaking hammer. The tunnel construction equipment can be any one of a tunnel boring machine, a tunnel tunneling and anchoring integrated machine, a tunnel tunneling and milling integrated machine and an excavator.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The utility model provides a compound hydraulic control system of quartering hammer, a serial communication port, including oil tank (1), first main pump (2), second main pump (3), pilot pump (4), electric proportion relief valve (5), enable valve (6), hydraulically controlled switching-over valve (7), first electric proportion relief valve (8), proportion direction valve (10), shuttle valve (11), controller (12) and pressure sensor (13), the oil inlet of first main pump (2), second main pump (3) and pilot pump (4) all is connected with oil tank (1), the T mouth of export to proportion direction valve (10) after the pressure oil confluence that first main pump (2) and second main pump (3) provided, another way flows back to oil tank (1) through enable valve (6), the A mouth, the B mouth of proportion direction valve (10) are connected with the A mouth, the B mouth of quartering hammer motor (100) respectively, the P mouth of proportion direction valve (10) is connected with oil tank (1), the left side control hydraulic fluid port of proportion direction valve (10) is connected to oil tank (1) through first electric proportion relief valve (8), the pressure relief valve (4) is connected with the first port of first main pump (2), the oil outlet of first main pump (3) and the pilot pump (2) are connected with the first port of pilot pump (2), the oil outlet of the first main pump (10) is connected with the first port of the pilot pump (2 simultaneously, the hydraulic control reversing valve (7) is connected to the oil tank (1) through the electric proportional overflow valve (5) at the port A, the proportional direction valve (10) is connected with the pilot port of the hydraulic control reversing valve (7), the pressure sensor (13) is used for detecting the pressure at the port A of the breaking hammer motor (100), and the pressure sensor (13), the first electric proportional pressure reducing valve (8), the electric proportional overflow valve (5) and the enabling valve (6) are electrically connected with the controller (12).
2. The compound hydraulic control system of the breaking hammer according to claim 1, further comprising a first overflow valve (14) and a balance valve (15), wherein the first overflow valve (14) is respectively connected with an A port and a B port of the breaking hammer motor (100), a working oil port of the balance valve (15) is respectively connected with the breaking hammer motor (100) and the B port of the proportional direction valve (10) and the first overflow valve (14), and a pilot oil port of the balance valve (15) is also connected with the A port of the breaking hammer motor (100).
3. The compound hydraulic control system of the breaking hammer according to claim 1, further comprising a first pressure maintaining balance valve group (16), a third pressure maintaining balance valve group (18), a second electric proportional pressure reducing valve (20) and a fourth electric proportional pressure reducing valve (22), wherein pilot oil ports of the second electric proportional pressure reducing valve (20) and the fourth electric proportional pressure reducing valve (22) are connected with the pilot pump (4), working oil ports of the first pressure maintaining balance valve group (16) are respectively connected with a rod cavity of a breaking hammer feeding oil cylinder (200) and an oil tank (1), working oil ports of the third pressure maintaining balance valve group (18) are respectively connected with oil outlets of a rodless cavity of the breaking hammer feeding oil cylinder (200), the first main pump (2) and the second main pump (3), the second electric proportional pressure reducing valve (20) is connected with a control oil port of the first pressure maintaining balance valve group (16), and the fourth electric proportional pressure reducing valve (22) is connected with a control oil port of the third pressure maintaining balance valve group (18).
4. The compound hydraulic control system of the breaking hammer according to claim 3, further comprising a second pressure maintaining balance valve group (17), a fourth pressure maintaining balance valve group (19), a third electric proportional pressure reducing valve (21) and a fifth electric proportional pressure reducing valve (23), wherein pilot oil ports of the third electric proportional pressure reducing valve (21) and the fifth electric proportional pressure reducing valve (23) are connected with the pilot pump (4), working oil ports of the second pressure maintaining balance valve group (17) are respectively connected with a rodless cavity of a breaking hammer feeding oil cylinder (200) and an oil tank (1), working oil ports of the fourth pressure maintaining balance valve group (19) are respectively connected with oil outlets of a rod cavity of the breaking hammer feeding oil cylinder (200), the first main pump (2) and the second main pump (3), the third electric proportional pressure reducing valve (21) is connected with a control oil port of the second pressure maintaining balance valve group (17), and the fifth electric proportional pressure reducing valve (23) is connected with a control oil port of the fourth pressure maintaining balance valve group (19).
5. The compound hydraulic control system of a breaking hammer of claim 4, wherein each dwell balancing valve block includes at least two dwell balancing valves therein.
6. The compound hydraulic control system of a breaking hammer according to claim 1, characterized in that the right control port of the proportional directional valve (10) is connected to the oil tank (1) through a sixth electro proportional pressure reducing valve (9), and the sixth electro proportional pressure reducing valve (9) is electrically connected to the controller (12).
7. The compound hydraulic control system of a breaking hammer according to claim 1, characterized by further comprising a second relief valve (24) arranged on the bypass line of the pilot pump (4) for controlling the pilot oil line pressure.
8. The compound hydraulic control system of a breaking hammer according to claim 1, characterized in that the opening a and the opening B of the breaking hammer motor (100) are each connected to the oil tank (1) via a safety valve (25).
9. The composite hydraulic control system of a breaking hammer according to claim 1, characterized in that the controller (12) is in communication with a remote control, by means of which remote control is performed.
10. Tunnel construction equipment, characterized by a compound hydraulic control system employing a breaking hammer according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320294172.9U CN219795713U (en) | 2023-02-23 | 2023-02-23 | Compound hydraulic control system of breaking hammer and tunnel construction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320294172.9U CN219795713U (en) | 2023-02-23 | 2023-02-23 | Compound hydraulic control system of breaking hammer and tunnel construction equipment |
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| Publication Number | Publication Date |
|---|---|
| CN219795713U true CN219795713U (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320294172.9U Active CN219795713U (en) | 2023-02-23 | 2023-02-23 | Compound hydraulic control system of breaking hammer and tunnel construction equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN219795713U (en) |
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2023
- 2023-02-23 CN CN202320294172.9U patent/CN219795713U/en active Active
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