Hydraulic system for a tunneling teaching machine

Abstract

The application provides a tunneling teaching machine hydraulic system, and belongs to the technical field of hydraulic systems. The tunneling teaching machine hydraulic system comprises a pushing module, a conveying module, a supporting module, an articulated module, an overbreak cutter module and a system power pump station for providing oil sources for the five modules. The application integrates all functions of actual tunneling, can complete testing of domestic control systems, can realize testing of the tunneling machine hydraulic system before being mounted, can complete preliminary testing of certain special working conditions, and can shorten the development cycle. Since it is simulation testing, each module does not need to be set to the actual size, and the layout of each module also does not need to be set to the actual layout, and can be as small as possible, which not only can meet the simulation of the working conditions of the actual tunneling hydraulic system, but also can greatly save the cost, improve the testing efficiency and reduce the time consumption. Meanwhile, by merging the power oil sources, the modules with similar pressure levels are integrated together, which can save the energy consumption and improve the energy utilization rate.

Description

Technical Field

[0001] This invention relates to a hydraulic system for a tunneling training machine, belonging to the field of hydraulic system technology. Background Technology

[0002] Currently, most hydraulic control systems for tunneling machines are still imported, resulting in high procurement cycles and maintenance costs for both hardware and software. The applicant has developed a domestically produced hydraulic control system; however, this new system requires a tunneling machine platform for functional verification and extensive operational testing. Although tunneling machine hydraulic systems are mature, their application in large-scale tunneling involves actual tunneling operations, necessitating on-site testing of the control system on a real tunneling machine. Given the massive size of actual tunneling machines, each module of the hydraulic system requires a dedicated power source. Using such systems for testing and verification would lead to high energy consumption, high costs, low efficiency, and long processing times.

[0003] Therefore, it is necessary to propose a hydraulic system for a tunneling teaching machine specifically designed for simulation testing. Summary of the Invention

[0004] The purpose of this invention is to provide a hydraulic system for a tunneling training machine specifically designed for simulation testing, in order to solve the problems of high energy consumption, high cost, low efficiency, and long time consumption caused by on-site testing on actual tunneling machines in the prior art.

[0005] To achieve the above objectives, the hydraulic system of the tunneling training machine in this invention adopts the following technical solution:

[0006] A hydraulic system for a tunneling training machine includes a propulsion module for simulating tunneling, a conveying module for simulating excavated soil conveying, a support module for simulating tunnel wall support, and a system power pump station that provides oil to at least the above three modules.

[0007] The beneficial effects of the above technical solution are as follows: The hydraulic system of the tunneling training machine of the present invention includes a propulsion module, a conveying module, a support module, and a system power pump station. The system power pump station can provide oil for the three modules, thereby realizing the simulation test of tunneling, excavated soil conveying, and tunnel wall support. It has the three most important functions of an actual tunneling machine. Since it is a simulation test, each module does not need to be set to the actual size, and the layout of each module does not need to be set to the actual layout. It can be minimized as much as possible, thereby reducing energy consumption, reducing costs, improving efficiency, and reducing time consumption.

[0008] Furthermore, the hydraulic system of the tunneling training machine also includes an articulated module for simulating test reversing. The system power pump station includes a first control pump for providing oil to the propulsion module and the articulated module. The system power pump station also includes a second control pump for providing oil to the conveying module and the support module. The rated working pressure of the first control pump is less than the rated working pressure of the second control pump.

[0009] The beneficial effects of the above technical solution are as follows: the hydraulic system of the tunneling training machine also includes an articulation module, which can also perform reversing simulation tests, making it more powerful; in addition, the system power pump station includes two control pumps. The propulsion module and articulation module have lower system pressure requirements, so the first control pump with a lower rated working pressure provides the oil source, while the conveying module and support module have higher system pressure requirements, so the second control pump with a higher rated working pressure provides the oil source. In this way, by merging the power oil source and integrating modules with similar system pressure levels together, it is possible to achieve the purpose of energy saving and cost reduction.

[0010] Furthermore, both the first control pump and the second control pump are constant power control pumps.

[0011] The beneficial effect of the above technical solution is that it has a better performance.

[0012] Furthermore, the rated operating pressure of the first control pump is 80 bar, and the rated operating pressure of the second control pump is 120 bar.

[0013] The advantages of the above technical solution are that the pressure is relatively small compared to that of actual tunneling machines, which can reduce equipment cost, size and energy consumption.

[0014] Furthermore, the hydraulic system of the tunneling training machine also includes an over-digging cutter module for simulating and testing the operation of the over-digging cutter, and the first control pump also provides oil to the over-digging cutter module.

[0015] The beneficial effects of the above technical solution are as follows: the hydraulic system of the tunneling training machine also includes an over-digging cutter module, which can also perform simulation tests of over-digging cutter operation, making it more powerful. At the same time, the system pressure requirement of the over-digging cutter module is relatively small, and the first control pump also provides oil to the over-digging cutter module, which can achieve the effects of energy saving and cost reduction.

[0016] Furthermore, the over-digging cutter module includes an inlet ball valve, a return check valve, a solenoid directional valve, a pressure reducing valve, a one-way throttle valve, a balance valve, and an over-digging cutter cylinder.

[0017] The beneficial effects of the above technical solution are as follows: the electromagnetic reversing valve can realize the reversing of the super excavator cutter cylinder, the one-way throttle valve can realize the oil inlet throttling speed regulation of the super excavator cutter module, the balance valve can realize the pressure holding function when there is no power source, and the pressure reducing valve can adjust the system pressure entering the super excavator cutter module.

[0018] Furthermore, the articulation module includes an inlet ball valve, a pressure reducing valve, a return check valve, and multiple identical articulation circuits. Each articulation circuit includes a solenoid directional valve, a one-way throttle valve, a balance valve, a pressure sensor, and an articulation cylinder.

[0019] The beneficial effects of the above technical solution are as follows: the pressure reducing valve can adjust the system pressure entering the articulation module, the electromagnetic reversing valve can realize the reversing of the articulation cylinder, the one-way throttle valve can realize inlet throttling speed regulation, and the balance valve can realize the pressure holding of the articulation cylinder when the electromagnetic reversing valve is in the neutral position.

[0020] Furthermore, the propulsion module includes an inlet ball valve, a return check valve, a proportional speed control valve, and multiple identical propulsion circuits. Each propulsion circuit includes a proportional pressure reducing valve, a solenoid directional valve, a hydraulic check valve, a circuit safety valve, and a propulsion cylinder.

[0021] The beneficial effects of the above technical solution are as follows: the electromagnetic reversing valve can control the oil inlet and outlet of the rod chamber and rodless chamber of the propulsion cylinder, and the proportional speed control valve and proportional pressure reducing valve can adjust the system flow and system pressure proportionally.

[0022] Furthermore, the conveying module is a screw conveyor module, which includes a rotary motor circuit, a rear door circuit, a front door circuit, and a telescopic cylinder circuit. The rotary motor circuit includes an inlet ball valve, a return check valve, a circuit safety valve, a proportional directional valve, a balance valve, and a rotary motor. The rear door circuit includes an inlet ball valve, a return check valve, a solenoid directional valve, a pressure reducing valve, a one-way throttle valve, a balance valve, a rear door cylinder, a rod-side ball valve, and a rodless-side ball valve. The front door circuit includes an inlet ball valve, a return check valve, a pressure reducing valve, a solenoid directional valve, a one-way throttle valve, a balance valve, and a front door cylinder. The telescopic cylinder circuit includes a solenoid directional valve, a one-way throttle valve, a balance valve, and a telescopic cylinder.

[0023] The beneficial effects of the above technical solution are as follows: the screw conveyor can realize the closed conveying of slag and soil, and the valves in the corresponding screw conveyor module can realize the simulation test of the rotary motor, rear door, front door and telescopic cylinder.

[0024] Furthermore, the support module is a segment assembly machine module, which includes a rotary motor circuit, an axial movement circuit, a blue cylinder circuit, a red cylinder circuit, and a gripping cylinder circuit. The rotary motor circuit includes an inlet ball valve, a return check valve, a circuit safety valve, a proportional directional valve, a balance valve, and a rotary motor. The axial movement circuit includes a circuit safety valve, a proportional directional valve, a balance valve, and an axial movement cylinder. The blue cylinder circuit and the red cylinder circuit include an inlet ball valve, a return check valve, a proportional directional valve, a balance valve, and a hydraulic cylinder. The gripping cylinder circuit includes an inlet ball valve, a return check valve, a solenoid directional valve, a pressure reducing valve, a one-way throttle valve, a balance valve, and a gripping cylinder.

[0025] The beneficial effects of the above technical solution are as follows: the segment assembly machine supports the tunnel wall by assembling segments, making the support more convenient and reliable. The corresponding segment assembly machine module can realize the simulation test of rotary motor, axial movement cylinder, blue cylinder, red cylinder and gripping cylinder. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the hydraulic system of the tunneling teaching machine in this invention.

[0027] Figure 2 This is a structural schematic diagram of the propulsion module, over-digging cutter module, and articulation module of the hydraulic system of the tunneling teaching machine in this invention;

[0028] Figure 3 This is a structural schematic diagram of the screw conveyor module and the segment assembly machine module of the hydraulic system of the tunneling teaching machine in this invention;

[0029] Figure 4 This is a schematic diagram of the system power pump station structure of the hydraulic system of the tunneling teaching machine in this invention.

[0030] In the diagram: 10. Propulsion module; 11. Inlet ball valve; 12. Return check valve; 13. Proportional speed control valve; 14. Proportional pressure reducing valve; 15. Solenoid directional valve; 16. Hydraulic check valve; 17. Circuit safety valve; 18. Propulsion cylinder; 20. Overhead cutter module; 21. Inlet ball valve; 22. Return check valve; 23. Solenoid directional valve; 24. Pressure reducing valve; 25. One-way throttle valve; 26. Balance valve; 27. Overhead cutter cylinder; 30. Screw conveyor module; 31. Rotary motor circuit; 311. Inlet ball valve; 312. Return check valve; 313. Circuit safety valve; 314. Proportional directional valve; 315. Balance valve; 316. Rotary motor; 32. Rear door circuit; 321. 322. Inlet ball valve; 323. Return check valve; 324. Solenoid directional valve; 325. Pressure reducing valve; 326. One-way throttle valve; 327. Balance valve; 328. Rod-type ball valve; 329. Rodless ball valve; 33. Rear compartment door cylinder; 33. Front compartment door circuit; 331. Inlet ball valve; 332. Return check valve; 333. Pressure reducing valve; 334. Solenoid directional valve; 335. One-way throttle valve; 336. Balance valve; 337. Front compartment door cylinder; 34. Telescopic cylinder circuit; 341. Solenoid directional valve; 342. One-way throttle valve; 343. Balance valve; 344. Telescopic cylinder; 40. Hinge module; 41. Inlet ball valve; 42. Return check valve; 43. Pressure reducing valve; 44. Electric 45. Magnetic directional valve; 46. One-way throttle valve; 47. Balance valve; 48. Pressure sensor; 59. Articulated cylinder; 50. Segment assembly machine module; 51. Rotary motor circuit; 511. Inlet ball valve; 512. Return check valve; 513. Circuit safety valve; 514. Proportional directional valve; 515. Balance valve; 516. Rotary motor; 52. Axial movement circuit; 521. Circuit safety valve; 522. Proportional directional valve; 523. Balance valve; 524. Axial movement cylinder; 53. Blue cylinder circuit; 531. Inlet ball valve; 532. Return check valve; 533. Circuit safety valve; 534. Proportional directional valve; 535. Balance valve; 536. Hydraulic cylinder; 54. Red cylinder circuit; 541. 542. Circuit safety valve; 543. Proportional directional valve; 544. Balance valve; 545. Hydraulic cylinder; 556. Grip cylinder circuit; 557. Inlet ball valve; 558. Return check valve; 559. Pressure reducing valve; 550. Solenoid directional valve; 551. One-way throttle valve; 552. Balance valve; 553. Grip cylinder; 60. System power pump station; 61. First constant power pump; 62. Second constant power pump; 63. First motor; 64. Second motor; 65. First suction filter; 66. First suction ball valve; 67. Second suction filter; 68. Second suction ball valve; 69. Thermometer; 610. Air filter; 611. Level gauge; 612. Return oil filter; 613. Return oil cooler. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0033] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0035] An embodiment of the hydraulic system of the tunneling training machine in this invention:

[0036] like Figure 1 As shown, the system includes a propulsion module 10 for simulating tunneling operation, an over-digger module 20 for simulating over-digger operation, a conveying module for simulating excavated soil transport, an articulated module 40 for simulating reversing, a support module for simulating tunnel wall support, and a system power pump station 60 that provides oil to the above five modules. Since the hydraulic system of the tunneling training machine in this embodiment simulates a tunnel boring machine (TBM), the conveying module is a screw conveyor module 30, and the support module is a segment assembly machine module 50.

[0037] Specifically, because the system pressure requirements of the propulsion module 10, the over-digger module 20, and the articulation module 40 are relatively low, while the system pressure requirements of the screw conveyor module 30 and the segment assembly machine module 50 are relatively high, the system power pump station 60 includes a first control pump for providing oil to the propulsion module 10, the over-digger module 20, and the articulation module 40, and a second control pump for providing oil to the screw conveyor module 30 and the segment assembly machine module 50. The rated operating pressure of the first control pump is lower than that of the second control pump. Both control pumps are constant power control pumps, such as... Figure 4 As shown, the first constant power pump 61 and the second constant power pump 62 are respectively, both with a displacement of 28 mL / r, to supply oil and output pressure to the five modules. Meanwhile, according to the different pressure requirements of the five modules, the rated working pressure of the first constant power pump 61 is set to 80 bar, and the rated working pressure of the second constant power pump 62 is set to 120 bar.

[0038] In this way, by merging the power oil source and integrating modules with similar pressure ratings, energy saving and cost reduction can be achieved. Furthermore, such as... Figure 4 As shown, the system power pump station 60 also includes a first motor 63 that drives the first constant power pump 61 and a second motor 64 that drives the second constant power pump 62. The power of the first motor 63 is 11kW, and the power of the second motor 64 is 15kW. The system power pump station 60 also includes a first suction filter 65, a first suction ball valve 66, a second suction filter 67, a second suction ball valve 68, a thermometer 69, an air filter 610, a level gauge 611, a return oil filter 612, and a return oil cooler 613.

[0039] like Figure 2 As shown, the propulsion module 10 includes an inlet ball valve 11, a return check valve 12, a proportional speed control valve 13, and four identical propulsion circuits. Each propulsion circuit includes a proportional pressure reducing valve 14, a solenoid directional valve 15, a hydraulically controlled check valve 16, a circuit safety valve 17, and a propulsion cylinder 18. The propulsion module 10 mainly realizes the extension and retraction of the propulsion cylinder 18. The four propulsion cylinders 18, distributed circumferentially, work together to propel the tunneling training machine forward. The solenoid directional valve 15 controls the inlet and outlet of the rod-side and rodless-side chambers of the propulsion cylinder 18. The circuit safety valve 17 is installed on the inlet and outlet circuits respectively, providing safety protection. The solenoid directional valve 15 has a Y-type function, and the hydraulically controlled check valve 16 is located in the large-chamber circuit, ensuring that the propulsion cylinder 18 will not fall down on its own when the solenoid directional valve 15 is not in the neutral position, thus providing safety protection. The proportional speed control valve 13 and the proportional pressure reducing valve 14 installed in front of the hydraulic cylinder 18 enable proportional regulation of the system flow and system pressure.

[0040] The over-digging tool module 20 implements simulation testing of the over-digging function, such as... Figure 2As shown, the system includes an inlet ball valve 21, a return check valve 22, a solenoid directional valve 23, a pressure reducing valve 24, a one-way throttle valve 25, a balance valve 26, and an over-digging cutter cylinder 27. The solenoid directional valve 23 enables the reversing of the over-digging cutter cylinder 27; the one-way throttle valve 25 regulates the inlet oil flow; and the balance valve 26 maintains pressure when there is no power source. A pressure reducing valve 24 is installed before the system, with a set pressure of 60 bar to ensure the pressure entering the over-digging cutter module.

[0041] like Figure 2 As shown, the articulated module 40 includes an inlet ball valve 41, a return check valve 42, a pressure reducing valve 43, and four identical articulated circuits. Each articulated circuit includes a solenoid directional valve 44, a one-way throttle valve 45, a balance valve 46, a pressure sensor 47, and an articulated cylinder 48. The pressure reducing valve 43, designed to operate at 60 bar before entering the system, ensures the system pressure. The solenoid directional valve 44 enables the articulated cylinder 48 to switch directions. The one-way throttle valve 45 in the circuit allows for inlet throttling and speed regulation. The balance valve 46 ensures that the articulated cylinder 48 can maintain pressure when the solenoid directional valve 44 is in the neutral position.

[0042] like Figure 3 As shown, the screw conveyor module 30 includes a rotary motor circuit 31, a rear door circuit 32, a front door circuit 33, and a telescopic cylinder circuit 34. The rotary motor circuit 31 includes an inlet ball valve 311, a return check valve 312, a circuit safety valve 313, a proportional directional valve 314, a balance valve 315, and a rotary motor 316. This circuit enables the rotation of the rotary motor 316, the proportional directional valve 314 enables proportional system adjustment, the balance valve 315 provides pressure maintenance, and the inlet and return circuit safety valves 313 provide protection.

[0043] The rear door circuit 32 includes an inlet ball valve 321, a return check valve 322, a solenoid directional valve 323, a pressure reducing valve 324, a one-way throttle valve 325, a balance valve 326, a rod-side ball valve 327, a rodless-side ball valve 328, and a rear door cylinder 329, which realizes the opening and closing of the rear door. Among them, the solenoid directional valve 323 realizes the reversing of the system, the pressure reducing valve 324 realizes that the oil source entering the system is 60 bar, the one-way throttle valve 325 in the system realizes the throttling speed regulation of the system inlet, and the balance valve 326 realizes the pressure maintenance of the rear door cylinder 329 system.

[0044] The front compartment door circuit 33 includes an inlet ball valve 331, a return check valve 332, a pressure reducing valve 333, a solenoid directional valve 334, a one-way throttle valve 335, a balance valve 336, and a front compartment door cylinder 337, which realizes the opening and closing of the front compartment door. Among them, the solenoid directional valve 334 realizes the system directional switching, the one-way throttle valve 335 realizes the system inlet oil throttling and speed regulation, the balance valve 336 realizes the pressure holding function of the system circuit, and the pressure reducing valve 333 in the system circuit realizes the system circuit pressure reduction.

[0045] The telescopic cylinder circuit 34 shares the inlet ball valve 331, return check valve 332, and pressure reducing valve 333 of the front door circuit 33. The telescopic cylinder circuit 34 includes a solenoid directional valve 341, a one-way throttle valve 342, a balance valve 343, and a telescopic cylinder 344, realizing the telescopic movement of the screw conveyor. The solenoid directional valve 341 enables system reversing, the one-way throttle valve 342 enables system inlet throttling and speed regulation, and the balance valve 343 enables the system circuit's pressure-maintaining function. Furthermore, both the telescopic cylinder circuit 34 and the front door circuit 33 include rod-side ball valves and rodless-side ball valves corresponding to the cylinders.

[0046] like Figure 3 As shown, the segment assembly machine module 50 includes a rotary motor circuit 51, an axial movement circuit 52, a blue cylinder circuit 53, a red cylinder circuit 54, and a gripping cylinder circuit 55. The rotary motor circuit 51 includes an inlet ball valve 511, a return check valve 512, a circuit safety valve 513, a proportional directional valve 514, a balance valve 515, and a rotary motor 516, completing the rotation for segment assembly. The proportional directional valve 514 enables system reversal, and the balance valve 515 maintains system pressure and can lock the rotary motor 516. Both the inlet and return circuits have circuit safety valves 513 for protection.

[0047] The axial movement circuit 52 includes a circuit safety valve 521, a proportional directional valve 522, a balance valve 523, and an axial movement cylinder 524, which completes the axial movement of the segment assembly. The proportional directional valve 522 realizes the proportional directional function of the system, the balance valve 523 realizes the system circuit pressure maintenance, and the circuit safety valve 521 for oil inlet and return realizes the safety protection function for oil inlet and outlet of the system.

[0048] The blue cylinder circuit 53 includes an inlet ball valve 531, a return check valve 532, a circuit safety valve 533, a proportional directional valve 534, a balance valve 535, and a hydraulic cylinder 536. The red cylinder circuit 54 shares the inlet ball valve 531 and the return check valve 532 of the blue cylinder circuit 53. The red cylinder circuit 54 includes a circuit safety valve 541, a proportional directional valve 542, a balance valve 543, and a hydraulic cylinder 544. The proportional directional valves 534 and 542 respectively realize system reversal, while the balance valves 535 and 543 respectively ensure the safety of the blue and red cylinder systems and prevent them from falling.

[0049] The gripping cylinder circuit 55 includes an inlet ball valve 551, a return check valve 552, a pressure reducing valve 553, a solenoid directional valve 554, a one-way throttle valve 555, a balance valve 556, and a gripping cylinder 557, realizing the gripping function of segment assembly. Among them, the solenoid directional valve 554 realizes the system reversal, the one-way throttle valve 555 realizes the inlet throttling speed regulation of the system, and the balance valve 556 ensures the oil pressure of the gripping cylinder 557 to prevent the mid-position function from falling.

[0050] In summary, the hydraulic system of the tunneling training machine of this invention integrates all the functions of actual tunneling by constructing a propulsion module 10, an over-digging cutter module 20, an articulation module 40, a screw conveyor module 30, and a segment assembly machine module 50. The various modules of the hydraulic system can be used to test the domestic control system and to perform pre-installation testing of the tunneling machine's hydraulic system, completing preliminary tests for certain special working conditions and shortening the development cycle. Since it is a simulation test, the modules do not need to be set to physical dimensions, and their layout does not need to be based on physical dimensions; they can be minimized as much as possible, with the overall length, width, and height not exceeding 2 meters. This not only satisfies the simulation of actual tunneling hydraulic system working conditions but also significantly saves costs, improves testing efficiency, and reduces time consumption. Simultaneously, by merging the power oil sources and integrating modules with similar pressure levels together, energy consumption is saved and energy utilization is improved.

[0051] In other embodiments of the hydraulic system of the tunneling training machine: the segment assembly machine module may include only one or more of the following: rotary motor circuit, axial movement circuit, blue cylinder circuit, red cylinder circuit, and gripping cylinder circuit. The valves in each circuit can also be configured or adjusted according to actual testing requirements.

[0052] In other embodiments of the hydraulic system of the tunneling training machine: the screw conveyor module may include only one or more of the following: rotary motor circuit, rear door circuit, front door circuit, and telescopic cylinder circuit. The valves in each circuit can also be configured or adjusted according to actual testing requirements.

[0053] In other embodiments of the hydraulic system of the tunneling training machine: the number of propulsion circuits in the propulsion module can also be two, three or more, and the valves in the propulsion circuits can also be configured or adjusted according to actual testing requirements.

[0054] In other embodiments of the hydraulic system of the tunneling teaching machine: the number of hinged circuits in the hinged module can also be two, three or more, and the valves in the hinged circuits can also be configured or adjusted according to actual testing requirements.

[0055] In other embodiments of the hydraulic system for a tunneling training machine: the hydraulic system for a tunneling training machine may not include an articulated module.

[0056] In other embodiments of the hydraulic system of the tunneling training machine: the valve in the over-digging cutter module can be configured or adjusted according to actual testing requirements, or in other embodiments, the over-digging cutter module may not be provided.

[0057] In other embodiments of the hydraulic system of the tunneling training machine: the rated working pressure of the first control pump and the second control pump may also be other values.

[0058] In other embodiments of the hydraulic system of the tunneling training machine: the first control pump and the second control pump can also be pressure-limiting variable pumps.

[0059] In other embodiments of the hydraulic system of the tunneling training machine: the five modules, namely the propulsion module, the screw conveyor module, the segment assembly machine module, the articulation module and the over-digging cutter module, can each be equipped with a separate oil source to achieve independent control of each circuit.

[0060] In other embodiments of the hydraulic system of the tunneling training machine: if the hydraulic system of the tunneling training machine only includes a propulsion module, a screw conveyor module, and a segment assembly machine module, the three modules can each be equipped with a separate oil source to achieve independent control of each circuit.

[0061] In other embodiments of the hydraulic system of the tunneling training machine: the hydraulic system of the tunneling training machine can also simulate and test other types of tunneling machines, such as TBM hard rock tunneling machines. In this case, the conveying module for simulating and testing the excavated soil conveying can also be a belt conveyor module. In addition, depending on the actual tunnel conditions, the support module for simulating and testing the tunnel wall support can also be a bracket support module or a mixed spraying support module.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A hydraulic system for a tunneling training machine, characterized in that, The system includes a propulsion module for simulating tunneling, a conveying module for simulating excavated soil transport, a segment assembly machine module for simulating tunnel wall support, and a system power pump station that provides oil for at least the above three modules. The propulsion module includes an inlet ball valve, a return check valve, a proportional speed control valve, and multiple identical and parallel propulsion circuits. Each propulsion circuit includes a proportional pressure reducing valve, a solenoid directional valve, a circuit safety valve, and a propulsion cylinder. The proportional speed control valve is connected in series with the proportional pressure reducing valve in each propulsion circuit and is connected to the rodless chamber oil circuit of the propulsion cylinder. The proportional speed control valve is connected in parallel with the solenoid directional valve in each propulsion circuit and shares an inlet ball valve. The solenoid directional valve in each propulsion circuit is a three-position four-way solenoid directional valve with Y-type center position function and is connected to the rodless chamber oil circuit and the rod chamber oil circuit of the propulsion cylinder. Each rodless chamber oil circuit and rod chamber oil circuit is equipped with a circuit safety valve, and the circuit safety valve is connected to the return oil circuit where the return check valve is located.

2. The hydraulic system of the tunneling training machine according to claim 1, characterized in that, The hydraulic system of the tunneling training machine also includes an articulated module for simulating test reversing. The system power pump station includes a first control pump for providing oil to the propulsion module and the articulated module. The system power pump station also includes a second control pump for providing oil to the conveying module and the segment assembly machine module. The rated working pressure of the first control pump is less than the rated working pressure of the second control pump.

3. The hydraulic system of the tunneling training machine according to claim 2, characterized in that, Both the first and second control pumps are constant power control pumps.

4. The hydraulic system of the tunneling training machine according to claim 2, characterized in that, The rated operating pressure of the first control pump is 80 bar, and the rated operating pressure of the second control pump is 120 bar.

5. The hydraulic system of the tunneling training machine according to any one of claims 2 to 4, characterized in that, The hydraulic system of the tunneling training machine also includes an over-digging cutter module for simulating and testing the operation of the over-digging cutter, and the first control pump also provides oil to the over-digging cutter module.

6. The hydraulic system of the tunneling training machine according to claim 5, characterized in that, The over-digging tool module includes an inlet ball valve, a return check valve, a solenoid directional valve, a pressure reducing valve, a one-way throttle valve, a balance valve, and an over-digging tool cylinder.

7. The hydraulic system of the tunneling training machine according to any one of claims 2 to 4, characterized in that, The articulated module includes an inlet ball valve, a pressure reducing valve, a return check valve, and multiple identical articulated circuits. Each articulated circuit includes a solenoid directional valve, a one-way throttle valve, a balance valve, a pressure sensor, and an articulated cylinder.

8. The hydraulic system of the tunneling training machine according to any one of claims 1 to 4, characterized in that, Each propulsion cylinder is equipped with a hydraulically controlled check valve in the rodless chamber oil circuit.

9. The hydraulic system of the tunneling training machine according to any one of claims 1 to 4, characterized in that, The conveying module is a screw conveyor module, which includes a rotary motor circuit, a rear door circuit, a front door circuit, and a telescopic cylinder circuit. The rotary motor circuit includes an inlet ball valve, a return check valve, a circuit safety valve, a proportional directional valve, a balance valve, and a rotary motor. The rear door circuit includes an inlet ball valve, a return check valve, a solenoid directional valve, a pressure reducing valve, a one-way throttle valve, a balance valve, a rear door cylinder, a rod-side ball valve, and a rodless-side ball valve. The front door circuit includes an inlet ball valve, a return check valve, a pressure reducing valve, a solenoid directional valve, a one-way throttle valve, a balance valve, and a front door cylinder. The telescopic cylinder circuit includes a solenoid directional valve, a one-way throttle valve, a balance valve, and a telescopic cylinder.

10. The hydraulic system of the tunneling training machine according to any one of claims 1 to 4, characterized in that, The segment assembly machine module includes a rotary motor circuit, an axial movement circuit, a blue cylinder circuit, a red cylinder circuit, and a gripping cylinder circuit. The rotary motor circuit includes an inlet ball valve, a return check valve, a circuit safety valve, a proportional directional valve, a balance valve, and a rotary motor. The axial movement circuit includes a circuit safety valve, a proportional directional valve, a balance valve, and an axial movement cylinder. The blue and red cylinder circuits include an inlet ball valve, a return check valve, a proportional directional valve, a balance valve, and a hydraulic cylinder. The gripping cylinder circuit includes an inlet ball valve, a return check valve, a solenoid directional valve, a pressure reducing valve, a one-way throttle valve, a balance valve, and a gripping cylinder.

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