A hydraulic system for synchronous assembly and translation compensation of tunnel segments in a tunnel boring machine.

Abstract

The hydraulic system provided by this invention for synchronous assembly and translation compensation of tunnel boring machine (TBM) segments includes an electromagnetic ball valve, a proportional flow valve, first and second check valves, and a speed regulating valve. The electromagnetic ball valve inlet is connected to the high-pressure oil circuit for synchronous assembly, and its outlet is connected to the inlet of the proportional flow valve. The outlet of the proportional flow valve is connected to the rodless chamber port of the TBM translation cylinder via the first check valve. The speed regulating valve inlet is connected to the rod chamber port of the TBM translation cylinder, and its outlet is connected to the hydraulic oil tank via the second check valve. The proportional flow valve receives command signals calculated by the control center based on the TBM's travel speed and can adjust the valve core opening and change the oil flow rate entering the rodless chamber port according to the command signals, thus matching the movement speed of the TBM translation cylinder with the TBM's travel speed and achieving translation compensation. This hydraulic system enables synchronization of tunneling and segment assembly actions, eliminating the need for repeated manual positioning, resulting in high construction efficiency and good safety.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine (TBM) technology, and specifically to a hydraulic system for synchronous assembly and translation compensation of TBM segments. Background Technology

[0002] Tunnel boring machines (TBMs) are large pieces of machinery used in tunnel construction. They excavate tunnels by tunneling, and then use an assembly machine to assemble tunnel segments onto the inner wall of the tunnel to form support. Most existing TBMs consist of components such as the shield body, the assembly machine, and propulsion cylinders. Figure 1 and Figure 2 As shown, the assembly machine can be moved along the shield axis and installed inside the shield body. It is used to clamp the segments to be assembled and transport them to the assembly area. Once the segments are in place, the segment assembly operation can be completed by tightening the segment connecting bolts.

[0003] In actual operation, the tunneling and segment assembly actions of conventional tunnel boring machines (TBMs) are two sequential actions that cannot be performed simultaneously, resulting in low construction efficiency. Some TBMs have developed a scheme for simultaneous tunneling and assembly, but these schemes mostly focus on the stable control of the TBM's attitude during synchronous assembly and do not pay attention to the installation of segment connecting bolts. As a result, when installing segment connecting bolts, the assembly machine is often in a state of advancing with the TBM, requiring the assembly machine operator to adjust the actual position of the assembly machine via remote control to keep the relative position of the assembly machine and the assembled segments unchanged. However, the accuracy of manual positioning is poor, and it is easy for the assembly machine to move too far forward or backward, requiring repeated adjustments in the forward and backward directions, resulting in low construction efficiency. At the same time, since the segments gripped by the assembly machine have a certain weight and large inertia, repeated movements pose a high safety hazard. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments. This hydraulic system can realize the synchronous operation of tunneling and segment assembly, and improve construction efficiency and safety.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is a hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments, comprising: an electromagnetic ball valve, a proportional flow valve, a first check valve, a second check valve, and a speed regulating valve;

[0006] The inlet of the electromagnetic ball valve is connected to the synchronous assembly high-pressure oil circuit, the outlet of the electromagnetic ball valve is connected to the inlet of the proportional flow valve, and the outlet of the proportional flow valve is connected to the rodless chamber oil port of the translating cylinder of the assembly machine through the first check valve; the inlet of the speed regulating valve is connected to the rod chamber oil port of the translating cylinder of the assembly machine, and the outlet of the speed regulating valve is connected to the hydraulic oil tank through the second check valve.

[0007] The proportional flow valve can receive command signals calculated by the control center based on the tunnel boring machine's travel speed, and adjust the valve core opening according to the command signals to change the flow rate of oil entering the rodless chamber oil port, so that the moving speed of the assembly machine translation cylinder matches the travel speed of the tunnel boring machine, thereby achieving translation compensation.

[0008] Preferably, the hydraulic system further includes a multi-way valve group connecting the conventional high-pressure oil circuit of the assembly machine to the translation cylinder of the assembly machine. The multi-way valve group is used to receive the control signal of the remote controller of the assembly machine and drive the translation cylinder of the assembly machine to move. The electromagnetic ball valve is interlocked with the remote controller of the assembly machine, and at any time, only one of the two can control the movement of the translation cylinder of the assembly machine.

[0009] More preferably, the hydraulic system further includes a balance valve group connected between the multi-way valve group and the assembly machine translation cylinder. When the tunnel boring machine stops tunneling, the balance valve group can balance the oil pressure in the rod chamber and the rodless chamber of the assembly machine translation cylinder.

[0010] Preferably, the second check valve is a hydraulically controlled check valve, and the control line of the second check valve is connected to the outlet of the solenoid ball valve.

[0011] Preferably, a manual ball valve, a high-pressure filter, and a pressure reducing valve are also provided between the electromagnetic ball valve and the synchronously assembled high-pressure oil circuit. The manual ball valve, the high-pressure filter, and the pressure reducing valve are arranged sequentially along the hydraulic oil flow direction, and the drain port of the pressure reducing valve is connected to the hydraulic oil tank.

[0012] Preferably, the electromagnetic ball valve has a return port connected to the hydraulic oil tank.

[0013] Preferably, the hydraulic system further includes a first relief valve, a second relief valve, and a third relief valve. The inlet of the first relief valve is connected to the outlet of the proportional flow valve. The second relief valve is connected between the second check valve and the hydraulic oil tank. The third relief valve is connected in parallel with the second relief valve. Both the first relief valve and the second relief valve are proportional relief valves.

[0014] More preferably, the hydraulic system further includes pressure sensors and pressure gauges. The pressure sensors include a first pressure sensor connected between the solenoid ball valve and the proportional flow valve, a second pressure sensor connected between the first check valve and the rodless chamber port, and a third pressure sensor connected between the speed control valve and the rod chamber port. The pressure gauges include a first pressure gauge connected between the solenoid ball valve and the proportional flow valve, a second pressure gauge connected between the proportional flow valve and the first check valve, a third pressure gauge connected between the first check valve and the rodless chamber port, a fourth pressure gauge connected between the speed control valve and the rod chamber port, and a fifth pressure gauge connected between the second check valve and the second relief valve.

[0015] More preferably, the pressure sensor is connected to the control center.

[0016] More preferably, the translation cylinder of the assembly machine has a built-in stroke sensor, which is used to detect the movement stroke of the translation cylinder of the assembly machine in real time and transmit it to the control center so as to correct the command signal.

[0017] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0018] The hydraulic system provided by this invention for synchronous assembly and translation compensation of tunnel boring machine segments includes an electromagnetic ball valve, a proportional flow valve, first and second check valves, and a speed regulating valve. The electromagnetic ball valve inlet is connected to the high-pressure oil circuit for synchronous assembly, and its outlet is connected to the inlet of the proportional flow valve. The outlet of the proportional flow valve is connected to the rodless chamber port of the translating cylinder of the assembler via the first check valve. The speed regulating valve inlet is connected to the rod chamber port of the translating cylinder of the assembler, and its outlet is connected to the hydraulic oil tank via the second check valve. The proportional flow valve receives command signals calculated by the control center based on the tunnel boring machine's travel speed. It can adjust the valve core opening and change the oil flow rate entering the rodless chamber port according to the command signals, matching the moving speed of the translating cylinder of the assembler with the travel speed of the tunnel boring machine, thus achieving translation compensation. This hydraulic system enables synchronous tunneling and segment assembly, eliminating the need for repeated manual positioning during segment connection bolt installation, resulting in high construction efficiency and good safety. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an existing tunnel boring machine.

[0020] Figure 2 yes Figure 1 A structural diagram of the assembly machine.

[0021] Figure 3 This is a schematic diagram of a preferred embodiment of the present invention.

[0022] The components include: 1. Shield body; 2. Assembly machine; 3. Propulsion cylinder; 4. Completed ring segment; 5. Segment to be assembled; 6. Lifting cylinder; 7. Translation cylinder; 8. K-block cylinder; 10. Solenoid ball valve; 11. Proportional flow valve; 12. First check valve; 13. Second check valve; 14. Speed ​​control valve; 15. Assembly machine translation cylinder; 16. Rodless chamber port; 17. Rod chamber port; 18. Hydraulic oil tank; 19. Multi-way valve group; 20. Balance valve group; 21. 21. Manual ball valve; 22. High-pressure filter; 23. Pressure reducing valve; 24. Oil return port; 25. First relief valve; 26. Second relief valve; 27. Third relief valve; 28. First pressure sensor; 29. ​​Second pressure sensor; 30. Third pressure sensor; 31. First pressure gauge; 32. Second pressure gauge; 33. Third pressure gauge; 34. Fourth pressure gauge; 35. Fifth pressure gauge; 36. Synchronously assembled high-pressure oil circuit; 37. Conventionally assembled high-pressure oil circuit. Detailed Implementation

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0024] like Figure 3 As shown, the hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments provided by the present invention includes: an electromagnetic ball valve 10, a proportional flow valve 11, a first check valve 12, a second check valve 13, and a speed regulating valve 14; wherein, the inlet of the electromagnetic ball valve 10 is connected to the synchronous assembly high-pressure oil circuit 36, the outlet of the electromagnetic ball valve 10 is connected to the inlet of the proportional flow valve 11, and the outlet of the proportional flow valve 11 is connected to the rodless chamber port 16 of the assembly machine translation cylinder 15 through the first check valve 12; the inlet of the speed regulating valve 14 is connected to the rod chamber port 17 of the assembly machine translation cylinder 15, and the outlet of the speed regulating valve 14 is connected to the rod chamber port 17 of the assembly machine translation cylinder 15. The hydraulic system is connected to the hydraulic oil tank 18 via the second check valve 13. The proportional flow valve 11 can receive the command signal calculated by the control center (not shown in the figure) based on the tunnel boring machine's travel speed, and adjust the valve core opening according to the command signal to change the oil flow rate entering the rodless chamber oil port 16, so that the moving speed of the assembly machine translation cylinder 15 matches the travel speed of the tunnel boring machine (equal in magnitude and opposite in direction), thus achieving translation compensation. This enables the hydraulic system to achieve synchronous tunneling and segment assembly, eliminating the need for repeated manual positioning when installing segment connection bolts, resulting in high construction efficiency and good safety.

[0025] In this embodiment, the hydraulic system also includes a multi-way valve group 19 that connects the conventional assembly high-pressure oil circuit 37 to the assembly machine translation cylinder 15. The multi-way valve group 19 is used to receive control signals from the assembly machine remote controller (not shown in the figure) and drive the assembly machine translation cylinder 15 to move. The electromagnetic ball valve 10 is interlocked with the assembly machine remote controller. This interlock means that at any given time, only one of the two can control the assembly machine translation cylinder 15 to move.

[0026] The advantage of this setup is that when aligning the segment connection bolts, the segments can be gradually brought closer together using the assembly machine remote control. Slight misalignment can be neutralized by the dimensional redundancy between the bolt holes and the connecting bolts, eliminating the need for repeated back-and-forth movements. Furthermore, when the operator is not controlling the assembly machine remote control to check the positional difference between the segment to be assembled and the connecting bolts, the solenoid ball valve 10 can immediately activate, keeping the relative position of the segment to be assembled and the connecting bolts unchanged, making it convenient to check.

[0027] In actual shield tunneling, the tunnel is not always straight; there are sometimes slopes in the vertical direction. In such terrain, the shield machine often needs to stop frequently for directional correction. At this time, the translating cylinder 15 of the assembly machine is prone to spontaneous action due to the oil pressure difference between the rod chamber and the rodless chamber. To avoid this phenomenon, in this embodiment, the hydraulic system also includes a balance valve group 20 connected between the multi-way valve group 19 and the translating cylinder 15 of the assembly machine. When the shield machine stops tunneling, the balance valve group 20 can balance the oil pressure in the rod chamber and the rodless chamber of the translating cylinder 15 of the assembly machine.

[0028] In this embodiment, the first check valve 12 prevents the tunnel boring machine from automatically retracting the translating cylinder 15 of the assembly machine due to the slope; the speed regulating valve 14 is used to limit the return oil flow to prevent the large flow of return oil from the conventional assembly high-pressure oil circuit 37 from damaging the electromagnetic ball valve 10 side of the hydraulic system; the second check valve 13 is a hydraulically controlled check valve, and the control pipeline of the second check valve 13 is connected to the outlet of the electromagnetic ball valve 10 to prevent malfunction and ensure that the hydraulic system can only work normally when the electromagnetic ball valve 10 is open.

[0029] In this embodiment, a manual ball valve 21, a high-pressure filter 22, and a pressure reducing valve 23 are also provided between the electromagnetic ball valve 10 and the synchronously assembled high-pressure oil circuit 36. The manual ball valve 21, the high-pressure filter 22, and the pressure reducing valve 23 are arranged sequentially along the hydraulic oil flow direction. The manual ball valve 21 is used to realize the opening or closing operation of the electromagnetic ball valve 10 side of the hydraulic system. The high-pressure filter 22 ensures the cleanliness of the oil. The drain port of the pressure reducing valve 23 is connected to the hydraulic oil tank 18. The pressure reducing valve 23 is used to prevent the high-pressure oil from impacting the electromagnetic ball valve 10 side of the hydraulic system. In order to protect the electromagnetic ball valve 10, the electromagnetic ball valve 10 further has a return port 24 connected to the hydraulic oil tank 18.

[0030] Because the remote control of the assembly machine requires a certain speed to control the movement of the translation cylinder 15, in order to balance lifting and positioning efficiency, while the solenoid ball valve 10 is basically in a creeping state when controlling the movement of the translation cylinder 15, the oil pressure of the conventional assembly high-pressure oil circuit 37 is much higher than that of the synchronous assembly high-pressure oil circuit 36 ​​(usually 3 to 4 times higher). Therefore, when the remote control is not activated, the high-pressure oil in the rod-side and rodless-side chambers of the translation cylinder 15 can easily generate a reverse impact on the solenoid ball valve 10 side of the hydraulic system. To eliminate this impact, in this embodiment... The hydraulic system also includes a first relief valve 25, a second relief valve 26, and a third relief valve 27. The inlet of the first relief valve 25 is connected to the outlet of the proportional flow valve 11. The second relief valve 26 is connected between the second check valve 13 and the hydraulic oil tank 18. The third relief valve 27 is connected in parallel with the second relief valve 26. In order to limit the maximum operating pressure on the side of the solenoid ball valve 10 of the hydraulic system and to provide back pressure for the hydraulic system to prevent the translating cylinder 15 of the assembly machine from automatically extending due to the slope, the first relief valve 25 and the second relief valve 26 are both proportional relief valves.

[0031] To facilitate oil pressure monitoring, in this embodiment, the hydraulic system further includes pressure sensors and pressure gauges. The pressure sensors include a first pressure sensor 28 connected between the solenoid ball valve 10 and the proportional flow valve 11, a second pressure sensor 29 connected between the first check valve 12 and the rodless chamber port 16, and a third pressure sensor 30 connected between the speed control valve 14 and the rod chamber port 17. The pressure gauges include a first pressure gauge 31 connected between the solenoid ball valve 10 and the proportional flow valve 11, a second pressure gauge 32 connected between the proportional flow valve 11 and the first check valve 12, a third pressure gauge 33 connected between the first check valve 12 and the rodless chamber port 16, a fourth pressure gauge 34 connected between the speed control valve 14 and the rod chamber port 17, and a fifth pressure gauge 35 connected between the second check valve 13 and the second relief valve 26.

[0032] To facilitate the control center's correction of the issued command signals, in this embodiment, all pressure sensors are connected to the control center to transmit pressure monitoring values. Furthermore, the assembly machine translation cylinder 15 has a built-in stroke sensor 37, which is used to detect the movement stroke of the assembly machine translation cylinder 15 in real time and transmit it to the control center for correction of the command signals.

[0033] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A hydraulic system for synchronous assembly and translation compensation of tunnel segments in a tunnel boring machine, comprising: The system comprises an electromagnetic ball valve, a proportional flow valve, a first check valve, a second check valve, and a speed control valve; characterized in that: The inlet of the electromagnetic ball valve is connected to the synchronous assembly high-pressure oil circuit, the outlet of the electromagnetic ball valve is connected to the inlet of the proportional flow valve, and the outlet of the proportional flow valve is connected to the rodless chamber oil port of the translating cylinder of the assembly machine through the first check valve; the inlet of the speed regulating valve is connected to the rod chamber oil port of the translating cylinder of the assembly machine, and the outlet of the speed regulating valve is connected to the hydraulic oil tank through the second check valve. The proportional flow valve can receive command signals calculated by the control center based on the tunnel boring machine's travel speed, and adjust the valve core opening according to the command signals to change the oil flow rate entering the rodless chamber oil port, so that the moving speed of the assembly machine translation cylinder matches the travel speed of the tunnel boring machine, achieving translation compensation; the hydraulic system also includes a multi-way valve group connecting the conventional assembly high-pressure oil circuit and the assembly machine translation cylinder, the multi-way valve group is used to receive control signals from the assembly machine remote controller to drive the assembly machine translation cylinder to move; the electromagnetic ball valve is interlocked with the assembly machine remote controller, and at any given time, only one of these two can control the movement of the assembly machine translation cylinder.

2. The hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments according to claim 1, characterized in that: The hydraulic system also includes a balance valve group connected between the multi-way valve group and the assembly machine translation cylinder. When the tunnel boring machine stops tunneling, the balance valve group can balance the oil pressure in the rod chamber and the rodless chamber of the assembly machine translation cylinder.

3. The hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments according to claim 1, characterized in that: The second check valve is a hydraulically controlled check valve, and the control line of the second check valve is connected to the outlet of the solenoid ball valve.

4. The hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments according to claim 1, characterized in that: A manual ball valve, a high-pressure filter, and a pressure reducing valve are also provided between the electromagnetic ball valve and the synchronously assembled high-pressure oil circuit. The manual ball valve, the high-pressure filter, and the pressure reducing valve are arranged in sequence along the hydraulic oil flow direction, and the drain port of the pressure reducing valve is connected to the hydraulic oil tank.

5. The hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments according to claim 1, characterized in that: The electromagnetic ball valve has a return port connected to the hydraulic oil tank.

6. The hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments according to claim 1, characterized in that: The hydraulic system further includes a first relief valve, a second relief valve, and a third relief valve. The inlet of the first relief valve is connected to the outlet of the proportional flow valve. The second relief valve is connected between the second check valve and the hydraulic oil tank. The third relief valve is connected in parallel with the second relief valve. Both the first relief valve and the second relief valve are proportional relief valves.

7. The hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments according to claim 6, characterized in that: The hydraulic system further includes pressure sensors and pressure gauges. The pressure sensors include a first pressure sensor connected between the solenoid ball valve and the proportional flow valve, a second pressure sensor connected between the first check valve and the rodless chamber port, and a third pressure sensor connected between the speed control valve and the rod chamber port. The pressure gauges include a first pressure gauge connected between the solenoid ball valve and the proportional flow valve, a second pressure gauge connected between the proportional flow valve and the first check valve, a third pressure gauge connected between the first check valve and the rodless chamber port, a fourth pressure gauge connected between the speed control valve and the rod chamber port, and a fifth pressure gauge connected between the second check valve and the second relief valve.

8. The hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments according to claim 7, characterized in that: The pressure sensor is connected to the control center.

9. The hydraulic system for synchronous assembly and translation compensation of tunnel boring machine segments according to any one of claims 1 to 8, characterized in that: The translation cylinder of the assembly machine is equipped with a stroke sensor. The stroke sensor is used to detect the movement stroke of the translation cylinder in real time and transmit it to the control center so as to correct the command signal.

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