TBM stabilizer hydraulic control system and control method

Abstract

The present invention discloses a TBM stabilizer hydraulic control system and control method, which solves the problem in the prior art that the stabilizer hydraulic control system cannot maintain the stability of the stabilizer device's tightening force under variable load conditions. The TBM stabilizer hydraulic control system of the present invention includes a left stabilizer cylinder and a right stabilizer cylinder connected to a valve block, the valve block including an electromagnetic switch valve connected to the valve block P1 port and a pressure reducing valve connected to the valve block P2 port; the electromagnetic switch valve is connected to a proportional pressure reducing valve through an oil circuit, the proportional pressure reducing valve is respectively connected to the rod chamber and the rodless chamber of the left stabilizer cylinder through a first valve group, and the pressure reducing valve is respectively connected to the rod chamber and the rodless chamber of the right stabilizer cylinder through a second valve group; a first sequence valve is connected in parallel to the first valve group, and a second sequence valve is connected in parallel to the second valve group. The present invention is equipped with two independently adjustable low-pressure, high-flow and high-pressure, low-flow circuits, which meet the requirements for multi-stage pressure setting of the stabilizer cylinder during the advancement and step-changing process of the TBM. The tightening force range of the stabilizer cylinder can be limited according to actual working conditions, adapting to load changes caused by TBM surrounding rock disturbances and main machine vibrations, thereby improving excavation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of TBM construction, and in particular to a hydraulic system for a TBM stabilizer. Background Art

[0002] Hard rock tunnel boring machines (TBMs) are widely used in tunnel construction due to their high excavation efficiency, high safety factor, ease of automation, and environmental protection. The stabilizer is a key component of the TBM mainframe, providing stable support. During excavation, the stabilizer applies low-pressure support to the tunnel wall to mitigate mainframe vibration. During step changes, high-pressure support is applied to the tunnel wall to stabilize the mainframe and prevent the cutterhead from being pulled back.

[0003] The stabilizer hydraulic control system must support both excavation and step-change pressure switching during TBM excavation. Furthermore, due to the high vibration and complex surrounding rock mass experienced during TBM excavation, the stabilizer device is subjected to variable loads. The stabilizer hydraulic control system also needs to be able to maintain a stable holding force. However, current stabilizer hydraulic control systems fail to meet these requirements. For example, the utility model patent application number 201621151424.9 discloses a pressure-adjustable stabilizer control valve assembly that can only set the safety valve pressure based on the high-pressure holding force required for step-change operation. During TBM excavation, the stabilizer device maintains low-pressure holding force against the tunnel wall. However, vibration from the main engine and other factors can cause the pressure in the rodless chamber of the stabilizer cylinder to rise. When this pressure does not reach the safety pressure, the stabilizer device maintains a high holding force, which in turn increases excavation resistance. Furthermore, the stabilizer device is subjected to high radial forces, which reduces the service life of the stabilizer cylinder and affects the equipment's excavation efficiency and stability. Therefore, a TBM stabilizer hydraulic control system is essential. Summary of the Invention

[0004] In response to the deficiencies in the above-mentioned background technology, the present invention proposes a TBM stabilizer hydraulic control system and control method, which solves the problem in the prior art that the stabilizer hydraulic control system cannot maintain stable stabilizer device tensioning force under variable load conditions.

[0005] The technical solution of the present invention is implemented as follows: a TBM stabilizer hydraulic control system includes a left stabilizer cylinder and a right stabilizer cylinder connected to a valve block, the valve block includes an electromagnetic switch valve connected to the P1 port of the valve block and a pressure reducing valve connected to the P2 port of the valve block; the electromagnetic switch valve is connected to a proportional pressure reducing valve through an oil circuit, the proportional pressure reducing valve is respectively connected to the rod chamber and the rodless chamber of the left stabilizer cylinder through a first valve group, and the pressure reducing valve is respectively connected to the rod chamber and the rodless chamber of the right stabilizer cylinder through a second valve group; a first sequence valve is connected in parallel to the first valve group, and a second sequence valve is connected in parallel to the second valve group.

[0006] Further preferably, the first valve group includes a first solenoid reversing valve, the P port of the first solenoid reversing valve is connected to the B port of the proportional pressure reducing valve through a first one-way valve; the A port of the first solenoid reversing valve is connected to the rodless chamber of the left stabilizer cylinder through a second one-way valve; the B port of the first solenoid reversing valve is connected to the rod chamber of the left stabilizer cylinder through a first balancing valve.

[0007] Further preferably, port A of the first sequence valve is connected to port B of the second one-way valve, port B of the first sequence valve is connected to port T1 of the valve block, and port C of the first sequence valve is connected to port A of the second one-way valve and port C of the first balancing valve.

[0008] Further preferably, the B port of the second one-way valve is connected to the MA1 port of the valve block, on which the first pressure sensor is provided. The T port of the first electromagnetic reversing valve and the C port of the proportional pressure reducing valve are both connected to the T1 port of the valve block.

[0009] Further preferably, the second valve group includes a second solenoid reversing valve, the P port of the second solenoid reversing valve is connected to the B port of the pressure reducing valve through a third one-way valve; the A port of the second solenoid reversing valve is connected to the rodless chamber of the right stabilizer cylinder through a fourth one-way valve; and the B port of the second solenoid reversing valve is connected to the rod chamber of the right stabilizer cylinder through a second balancing valve.

[0010] Further preferably, port A of the second sequence valve is connected to port B of the fourth one-way valve, port B of the second sequence valve is connected to port T2 of the valve block, and port C of the second sequence valve is connected to port A of the fourth one-way valve and port C of the second balancing valve.

[0011] Further preferably, the B port of the fourth one-way valve is connected to the MA2 port of the valve block, and the MA2 port of the valve block is provided with a second pressure sensor; the T port of the second electromagnetic reversing valve is connected to the T2 port of the valve block.

[0012] Further preferably, the P1 port of the valve block is connected to a high-pressure oil source, and the P2 port of the valve block is connected to a low-pressure, high-flow oil source.

[0013] A control method for a TBM stabilizer hydraulic control system includes a low-pressure tightening mode for a TBM stabilizer cylinder and a high-pressure tightening mode for a TBM stabilizer cylinder.

[0014] When the TBM stabilizer cylinder is in low-pressure tightening mode, when the stabilizer cylinder is required to tighten the tunnel wall at low pressure during TBM excavation, the solenoid switch valve loses power and is in a closed state, the proportional pressure reducing valve signal is zero, and the first solenoid reversing valve and the second solenoid reversing valve are energized in parallel; the low-pressure and high-flow oil source flows into the A port of the pressure reducing valve through the P2 port of the valve block, and the hydraulic oil flows out from its B port after being regulated by the pressure reducing valve. The hydraulic oil flowing out of the B port of the pressure reducing valve flows into the B port of the third check valve through the A port of the third check valve, and the hydraulic oil flowing out of the B port of the third check valve flows into the P port of the first solenoid reversing valve and the P port of the second solenoid reversing valve respectively. The hydraulic oil flows out from the A port of the first solenoid reversing valve after passing through the A port of the first solenoid reversing valve. The hydraulic oil flows to the second one-way valve, and at the same time, the hydraulic oil flowing out of the A port of the first solenoid reversing valve flows into the C port of the first balancing valve and the C port of the first sequence valve as the pilot oil, and the first balancing valve is opened; the hydraulic oil flowing out of the B port of the second one-way valve flows into the rodless chamber of the left stabilizer cylinder, and the left stabilizer cylinder extends; the hydraulic oil in the rod chamber of the left stabilizer cylinder flows into the B port of the first balancing valve, and the hydraulic oil flows out from its A port after passing through the first balancing valve. The hydraulic oil flowing out of the A port of the first balancing valve flows into the first solenoid reversing valve through the B port of the first solenoid reversing valve, and flows out from its T port after passing through the first solenoid reversing valve. The hydraulic oil flowing out of the T port of the first solenoid reversing valve flows to the external oil tank through the T2 port of the valve block. After the hydraulic oil passes through the second solenoid reversing valve, it flows out from its A port. The hydraulic oil flowing out of the A port of the second solenoid reversing valve flows forward into the fourth one-way valve through the A port of the fourth one-way valve. After the hydraulic oil passes through the fourth one-way valve, it flows out from its B port. At the same time, the hydraulic oil flowing out of the A port of the second solenoid reversing valve flows into the C port of the second balancing valve and the C port of the second sequence valve as pilot oil. The second balancing valve is opened, and the hydraulic oil flowing out of the B port of the fourth one-way valve flows into the rodless chamber of the right stabilizer cylinder, and the right stabilizer cylinder extends; the hydraulic oil in the rod chamber of the right stabilizer cylinder flows into the B port of the second balancing valve through its B port. After passing through the second balancing valve, the hydraulic oil flows out from its A port. The hydraulic oil flowing out of the A port of the second balancing valve flows into the second solenoid reversing valve through the B port of the second solenoid reversing valve. After passing through the second solenoid reversing valve, it flows out from its T port. The hydraulic oil flowing out of the T port of the second solenoid reversing valve goes to the external oil tank through the T2 port of the valve block. The first pressure sensor detects the pressure in the rodless cavity of the left stabilizer cylinder, and the second pressure sensor detects the pressure in the rodless cavity of the right stabilizer cylinder. After the left and right stabilizer cylinders extend and touch the hole wall, low-pressure tightening is achieved. At the same time, the pilot oil pressure of the C port of the first sequence valve is compared with the load pressure of its A port. When the difference is greater than the spring setting value of the first sequence valve, the hydraulic oil overflows from the B port of the first sequence valve to the T1 port of the valve block. Similarly, the pilot oil pressure of the C port of the second sequence valve is compared with the load pressure of its A port. When the difference between the two is greater than the spring setting value of the second sequence valve, the hydraulic oil overflows from the B port of the second sequence valve to the T2 port of the valve block, maintaining the low-pressure stability of the tightening force of the left and right stabilizer cylinders.

[0015] When the TBM stabilizer cylinder is in high-pressure tightening mode: when the stabilizer cylinder needs to tighten the cave wall with high pressure during the TBM step-changing process, the left stabilizer cylinder and the right stabilizer cylinder are first extended quickly and at low pressure through the above-mentioned TBM stabilizer cylinder low-pressure tightening mode, and then the high-pressure tightening is switched according to the pressure values ​​detected by the first pressure sensor and the second pressure sensor; at this time, the solenoid switch valve is energized, and the proportional pressure reducing valve is given a signal value according to the working condition, and the first solenoid reversing valve and the second solenoid reversing valve are energized in parallel; the high-pressure oil source flows into the A port of the solenoid switch valve through the P1 port of the valve block, and the high-pressure hydraulic oil flows out from its B port after passing through the solenoid switch valve, and the hydraulic oil flowing out of the B port of the solenoid switch valve flows into the A port of the proportional pressure reducing valve, and the high-pressure hydraulic oil flows out from its B port after being adjusted by the proportional pressure reducing valve, and the high-pressure hydraulic oil flowing out of the B port of the proportional pressure reducing valve flows into the A port of the first check valve, and the hydraulic After passing through the first one-way valve, the pressurized oil flows out from its B port. The hydraulic oil flowing out of the B port of the first one-way valve flows into the P port of the first solenoid reversing valve and the P port of the second solenoid reversing valve respectively. Then, the above-mentioned low-pressure tightening mode of the TBM stabilizer cylinder is operated. The high-pressure hydraulic oil enters the large chamber of the left stabilizer cylinder and the right stabilizer cylinder, and the hole wall is tightened with high pressure. At the same time, the pilot oil pressure of the C port of the first sequence valve is compared with the load pressure of its A port. When the difference is greater than the spring setting value of the first sequence valve, the hydraulic oil overflows from the B port to the T1 port of the valve block. Similarly, the pilot oil pressure of the C port of the second sequence valve is compared with the load pressure of its A port. When the difference between the two is greater than the spring setting value of the second sequence valve, the hydraulic oil overflows from the B port of the second sequence valve to the T2 port of the valve block, thereby maintaining the high-pressure stability of the tightening force of the left stabilizer cylinder and the right stabilizer cylinder during TBM construction.

[0016] The beneficial effects of the present invention are as follows: through the combined control of a proportional pressure reducing valve, a pressure reducing valve, and an electromagnetic reversing valve, the present invention can provide two independently adjustable low-pressure, high-flow, and high-pressure, low-flow oil sources, thereby achieving low-pressure and high-pressure tightening of the stabilizer cylinder, and realizing the multi-stage pressure setting requirements of the stabilizer cylinder during the advancement and step-changing processes of the TBM equipment. The present invention can adjust the set pressure of the sequence valve according to the actual working conditions, limit the difference between the load force and the tightening force of the stabilizer cylinder, adapt to the load changes of the stabilizer device caused by the vibration of the TBM main machine and the disturbance of the surrounding rock, maintain the stability of the tightening force of the stabilizer cylinder, and avoid the risk of the stabilizer cylinder being subjected to excessive radial force during the excavation process following the main machine, thereby improving the excavation efficiency and operational stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1Schematic diagram of the hydraulic system of the present invention. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 As shown in Example 1, a TBM stabilizer hydraulic control system includes a left stabilizer cylinder 16 and a right stabilizer cylinder 17 connected to a valve block 18. The valve block 18 includes a solenoid switch valve 1 connected to port P1 of the valve block 18 and a pressure reducing valve 4 connected to port P2 of the valve block 18. Port P1 of the valve block 18 is connected to a high-pressure oil source, while port P2 of the valve block 18 is connected to a low-pressure, high-flow oil source. The solenoid switch valve 1 is connected to a proportional pressure reducing valve 2 via an oil circuit. The proportional pressure reducing valve 2 is connected to the rod chamber and rodless chamber of the left stabilizer cylinder 16 via a first valve group, respectively. The pressure reducing valve 4 is connected to the rod chamber and rodless chamber of the right stabilizer cylinder 17 via a second valve group, respectively. A first sequence valve 10 is connected in parallel to the first valve group, and a second sequence valve 13 is connected in parallel to the second valve group. The sequence valves are connected to the rodless chamber of the corresponding stabilizer cylinder and can adjust the upper limit of the stabilizer cylinder's tightening force. The proportional pressure reducing valve regulates the high-pressure oil source pressure; the pressure reducing valve regulates the low-pressure oil source pressure. This hydraulic system, with two independently adjustable low-pressure, high-flow and high-pressure, low-flow circuits, meets the multi-stage pressure setting requirements of the stabilizer cylinders during TBM advancement and shifting, improving tunneling efficiency. This hydraulic control system limits the stabilizer cylinder's holding force according to the multi-stage pressure setting, adapting to load variations on the stabilizer caused by vibration of the TBM mainframe and surrounding rock disturbances, maintaining stable holding force and preventing the risk of sudden increases in radial force.

[0021] As an implementation, the first valve group in this embodiment includes a first solenoid reversing valve 6. The energization sequence of the first solenoid reversing valve determines the direction of movement of the left stabilizer cylinder. Port P of the first solenoid reversing valve 6 is connected to port B of the proportional pressure reducing valve 2 via a first check valve 3. Port A of the first solenoid reversing valve 6 is connected to the rodless chamber of the left stabilizer cylinder 16 via a second check valve 9. Port B of the first solenoid reversing valve 6 is connected to the rod chamber of the left stabilizer cylinder 16 via a first balancing valve 8. The balancing valve is connected to the rod chamber of the stabilizer cylinder.

[0022] Similarly, as an implementation, the second valve group in this embodiment includes a second solenoid reversing valve 7. The energization sequence of the second solenoid reversing valve determines the direction of movement of the right stabilizer cylinder. Port P of the second solenoid reversing valve 7 is connected to port B of the pressure reducing valve 4 via a third check valve 5. Port A of the second solenoid reversing valve 7 is connected to the rodless chamber of the right stabilizer cylinder 17 via a fourth check valve 12. Port B of the second solenoid reversing valve 7 is connected to the rod-loaded chamber of the right stabilizer cylinder 17 via a second balancing valve 11.

[0023] As described above, through the combined control of the proportional pressure reducing valve, the pressure reducing valve, and the solenoid reversing valve, two independently adjustable oil sources—low-pressure, high-flow, and high-pressure, low-flow—can be provided. This achieves low-pressure and high-pressure tensioning of the stabilizer cylinder, meeting the multi-stage pressure setting requirements of the stabilizer cylinder during the advancement and step-changing processes of the TBM equipment. Furthermore, the sequence valve set pressure—that is, the difference between the load force and the stabilizer cylinder tensioning force—can be adjusted according to actual operating conditions. This not only limits the safe pressure of the stabilizer cylinder rodless chamber during the TBM equipment's step-changing process, but also adapts to changes in the stabilizer device load caused by mainframe vibration and surrounding rock disturbance during tunneling, maintaining the stability of the stabilizer cylinder tensioning force and reducing the risk of the stabilizer cylinder being subjected to excessive radial force during the mainframe's tunneling. By controlling the pressure and flow in the stabilizer cylinder rod chamber through the balancing valve, automatic extension of the stabilizer cylinder caused by mainframe vibration can be avoided under no-load or low-load conditions, thereby improving the equipment's tunneling efficiency and operational smoothness.

[0024] Example 2, a TBM stabilizer hydraulic control system. Based on Example 1, this example is further optimized. In this example, port A of the first sequence valve 10 is connected to port B of the second one-way valve 9, port B of the first sequence valve 10 is connected to port T1 of the valve block 18, and port C of the first sequence valve 10 is connected to port A of the second one-way valve 9 and port C of the first balancing valve 8.

[0025] Port B of the second check valve 9 is connected to port MA1 of the valve block 18, which is equipped with a first pressure sensor 14. The valve block 18 has two MA1 ports, MA11 and MA12, with the first pressure sensor 14 located at MA12. The first pressure sensor 14 is connected to the rodless chamber of the left stabilizer cylinder to detect the pressure at that position. Port T of the first solenoid reversing valve 6 and port C of the proportional pressure reducing valve 2 are both connected to port T1 of the valve block 18.

[0026] As an embodiment, port A of the second sequence valve 13 is connected to port B of the fourth one-way valve 12, port B of the second sequence valve 13 is connected to port T2 of the valve block 18, and port C of the second sequence valve 13 is connected to port A of the fourth one-way valve 12 and port C of the second balancing valve 11.

[0027] Port B of the fourth one-way valve 12 is connected to port MA2 of the valve block 18, which is equipped with a second pressure sensor 15. The valve block 18 has two MA2 ports, MA21 and MA22. The second pressure sensor 15 is connected to MA22, which is connected to the rodless chamber of the right stabilizer cylinder to detect the pressure at that position. Port T of the second solenoid reversing valve 7 is connected to port T2 of the valve block 18.

[0028] For the convenience of distinction and description, the A / B port of the solenoid switch valve 1 is defined as 1A / 1B; the A / B / C port of the proportional pressure reducing valve 2 is 2A / 2B / 2C, the A / B port of the first check valve 3 is 3A / 3B; the A / B port of the pressure reducing valve 4 is 4A / 4B; the A / B port of the third check valve 5 is 5A / 5B; the A / B / T / P port of the first solenoid reversing valve 6 is 6A / 6B / 6T / 6P; the A / B / T / P port of the second solenoid reversing valve 7 is 7A / 7B / 7T / 7P, the A / B / C port of the first balancing valve 8 is 8A / 8B / 8C, and the A / The B port is 9A / 9B, the A / B / C port of the first sequence valve 10 is 10A / 10B / 10C, ​​the A / B / C port of the second balancing valve 11 is 11A / 11B / 11C, the A / B port of the fourth check valve 12 is 12A / 12B, the A / B / C port of the second sequence valve 13 is 13A / 13B / 13C, the rod chamber oil port of the left stabilizer cylinder 16 is 16B, and the rodless chamber oil port is 16A, the rod chamber oil port of the right stabilizer cylinder 17 is 17B, and the rodless chamber oil port is 17A.

[0029] The P1 port of the valve block 18 is connected to an external high-pressure oil source, and the P2 port is connected to an external low-pressure, high-flow oil source; the P1 port of the valve block 18 is connected to the 1A port of the electromagnetic switch valve 1; the 1B port of the electromagnetic switch valve 1 is connected to the 2A port of the proportional pressure reducing valve 2; the 2B port of the proportional pressure reducing valve 2 is connected to the 3A port of the first check valve 3; the 2C port of the proportional pressure reducing valve 2 is connected to the T1 port of the valve block 18; the 3B port of the first check valve 3 is connected to the 6P port of the first electromagnetic reversing valve 6 and the 7P port of the second electromagnetic reversing valve 7 respectively. P2 of the valve block 18 is connected to the 4A port of the pressure reducing valve 4; the 4B port of the pressure reducing valve 4 is connected to the 5A port of the third one-way valve 5; the 5B port of the third one-way valve 5 is respectively connected to the 7P port of the second solenoid reversing valve 7 and the 6P port of the first solenoid reversing valve 6; the 6A port of the solenoid reversing valve 6 is respectively connected to the 9A port of the second one-way valve 9, the 10C port of the first sequence valve 10, and the 8C port of the first balancing valve 8; the 9B port of the second one-way valve 9 is respectively connected to the 10A port of the first sequence valve 10, The A1 port of the valve block 18, the MA11 pressure measuring port and the MA12 pressure measuring port of the valve block 18 are connected; the A1 port of the valve block 18 is connected to the rodless chamber 16A port of the left stabilizer cylinder 16; the 6B port of the first solenoid reversing valve 6 is connected to the 8A port of the first balancing valve 8; the 8B port of the first balancing valve 8 is respectively connected to the B1 port and the MB1 pressure measuring port of the valve block 18, and the rod chamber 16B port of the left stabilizer cylinder 16; the first pressure sensor 14 is connected to the MA12 port of the valve block 18. The 7A port of the second electromagnetic reversing valve 7 is respectively connected to the 12A port of the fourth check valve 12, the 13C port of the second sequence valve 13, and the 11C port of the second balancing valve 11; the 12B port of the fourth check valve 12 is respectively connected to the 13A port of the sequence valve 13, the A2 port of the valve block 18, the MA21 pressure measuring port and the MA22 pressure measuring port of the valve block 18; the A2 port of the valve block 18 is connected to the 17A port of the rodless chamber of the right stabilizer cylinder 17; the 7B port of the second electromagnetic reversing valve 7 is respectively connected to the 13A port of the sequence valve 13, the A2 port of the valve block 18, and the MA21 pressure measuring port and the MA22 pressure measuring port of the valve block 18; the A2 port of the valve block 18 is connected to the 17A port of the rodless chamber of the right stabilizer cylinder 17; The port is connected to the 11A port of the second balancing valve 11; the 11B port of the second balancing valve 11 is respectively connected to the B2 port and MB2 pressure measurement of the valve block 18 and the rod chamber 17B port of the right stabilizer cylinder 17; the second pressure sensor 15 is connected to the MA22 port of the valve block 18; the T2 port of the valve block 18 is respectively connected to the 6T port of the first solenoid reversing valve 6, the 7T port of the second solenoid reversing valve 7, the 10B port of the first sequence valve 10, and the 13B port of the second sequence valve 13.

[0030] Embodiment 3, a control method of the TBM stabilizer hydraulic control system as described in embodiment 1 or 2, includes a TBM stabilizer cylinder low-pressure tightening mode and a TBM stabilizer cylinder high-pressure tightening mode.

[0031] When the TBM stabilizer cylinder is in low-pressure tightening mode, when the stabilizer cylinder is required to tighten the tunnel wall at low pressure during TBM excavation, the solenoid switch valve 1 loses power and is in a closed state, the signal of the proportional pressure reducing valve 2 is zero, and the first solenoid reversing valve 6 and the second solenoid reversing valve 7 are energized in parallel; the low-pressure and high-flow oil source flows into the A port of the pressure reducing valve 4 through the P2 port of the valve block 18, and the hydraulic oil flows out from its B port after being regulated by the pressure reducing valve 4. The hydraulic oil flowing out of the B port of the pressure reducing valve 4 flows into the B port of the third one-way valve 5 through the A port of the third one-way valve 5, and the hydraulic oil flowing out of the B port of the third one-way valve 5 flows into the P port of the first solenoid reversing valve 6 and the P port of the second solenoid reversing valve 7 respectively. The hydraulic oil flows out from the A port of the first solenoid reversing valve 6 after passing through the A port of the first solenoid reversing valve The oil flows to the second one-way valve 9, and at the same time, the hydraulic oil flowing out of the A port of the first solenoid reversing valve 6 flows into the C port of the first balancing valve 8 and the C port of the first sequence valve 10 as pilot oil, and the first balancing valve 8 is opened; the hydraulic oil flowing out of the B port of the second one-way valve 9 flows into the rodless chamber of the left stabilizer cylinder 16, and the left stabilizer cylinder 16 extends; the hydraulic oil in the rod chamber of the left stabilizer cylinder 16 flows into the B port of the first balancing valve 8, and the hydraulic oil flows out from its A port after passing through the first balancing valve 8. The hydraulic oil flowing out of the A port of the first balancing valve 8 flows into the first solenoid reversing valve 6 through the B port of the first solenoid reversing valve 6, and the hydraulic oil flows out from its T port after passing through the first solenoid reversing valve 6. The hydraulic oil flowing out of the T port of the first solenoid reversing valve 6 flows to the external oil tank through the T2 port of the valve block 18. The hydraulic oil flows out of the A port of the second solenoid reversing valve 7 after passing through the A port of the second solenoid reversing valve. The hydraulic oil flowing out of the A port of the second solenoid reversing valve 7 flows forward into the fourth one-way valve 12 through the A port of the fourth one-way valve 12. The hydraulic oil flows out of the B port of the fourth one-way valve 12 after passing through the B port of the fourth one-way valve 12. At the same time, the hydraulic oil flowing out of the A port of the second solenoid reversing valve 7 flows into the C port of the second balancing valve 11 and the C port of the second sequence valve 13 as the pilot oil. The second balancing valve 11 is opened, and the hydraulic oil flowing out of the B port of the fourth one-way valve 12 flows into the right stabilizer cylinder 1 7, the right stabilizer cylinder 17 extends; the hydraulic oil in the rod chamber of the right stabilizer cylinder 17 flows into the B port of the second balancing valve 11 through its B port, and the hydraulic oil flows out from its A port after passing through the second balancing valve 11. The hydraulic oil flowing out of the A port of the second balancing valve 11 flows into the second solenoid reversing valve 7 through the B port of the second solenoid reversing valve 7, and the hydraulic oil flows out from its T port after passing through the second solenoid reversing valve 7. The hydraulic oil flowing out of the T port of the second solenoid reversing valve 7 goes to the external oil tank through the T2 port of the valve block 18.The first pressure sensor 14 detects the pressure in the rodless cavity of the left stabilizer cylinder 16, and the second pressure sensor 15 detects the pressure in the rodless cavity of the right stabilizer cylinder 17. After the left stabilizer cylinder 16 and the right stabilizer cylinder 17 extend and touch the hole wall, low-pressure tightening is achieved. At the same time, the pilot oil pressure of the first sequence valve 10C port is compared with the load pressure of its A port. When the difference is greater than the spring setting value of the first sequence valve 10, the hydraulic oil overflows from the first sequence valve 10B port to the T1 port of the valve block 18. Similarly, the pilot oil pressure of the second sequence valve 13C port and The load pressures at port A are compared. When the difference between the two is greater than the spring setting value of the second sequence valve 13, oil overflows from port B of the second sequence valve 13 to port T2 of the valve block 18, maintaining the low-pressure stability of the tightening force of the left stabilizer cylinder 16 and the right stabilizer cylinder 17. This can avoid the increase in excavation resistance when the load force of the stabilizer device is too large due to the vibration of the main machine and the disturbance of the surrounding rock, thereby improving the excavation efficiency and operation stability of the TBM equipment, and also avoiding the risk of the left stabilizer cylinder 16 and the right stabilizer cylinder 17 being subjected to large radial forces during the excavation process following the main machine.

[0032] When the TBM stabilizer cylinder is in high-pressure tightening mode: when the stabilizer cylinder needs to tighten the tunnel wall at high pressure during the TBM step-changing process, the left stabilizer cylinder 16 and the right stabilizer cylinder 17 are first extended quickly and at low pressure through the above-mentioned TBM stabilizer cylinder low-pressure tightening mode, and then the high-pressure tightening is switched according to the pressure values ​​detected by the first pressure sensor 14 and the second pressure sensor 15; at this time, the solenoid switch valve 1 is energized, and the proportional pressure reducing valve 2 is given a signal value according to the working condition, and the first solenoid reversing valve 6 and the second solenoid reversing valve 7 are kept in parallel position and energized; the high-pressure oil source flows into the A port of the solenoid switch valve 1 through the P1 port of the valve block 18, and the high-pressure hydraulic oil flows out from its B port after passing through the solenoid switch valve 1, and the hydraulic oil flowing out of the B port of the solenoid switch valve 1 flows into the A port of the proportional pressure reducing valve 2, and the high-pressure hydraulic oil flows out from its B port after being adjusted by the proportional pressure reducing valve 2, and the high-pressure hydraulic oil flowing out of the B port of the proportional pressure reducing valve 2 flows into the A port of the first check valve 3, and the hydraulic oil flows out from its B port after passing through the first check valve 3. The liquid flowing out of the B port of the first check valve 3 The pressurized oil flows into the P port of the first solenoid reversing valve 6 and the P port of the second solenoid reversing valve 7 respectively, and then the TBM stabilizer cylinder low-pressure tightening mode is operated. The high-pressure hydraulic oil enters the large chambers of the left stabilizer cylinder 16 and the right stabilizer cylinder 17, and the high-pressure tightening of the tunnel wall is tightened. At the same time, the pilot oil pressure at the C port of the first sequence valve 10 is compared with the load pressure at its A port. When the difference is greater than the spring setting value of the first sequence valve 10, the hydraulic oil overflows from the B port to the T1 port of the valve block 18. Similarly, the pilot oil pressure at the C port of the second sequence valve 13 is compared with the load pressure at its A port. When the difference is greater than the spring setting value of the second sequence valve 13, the hydraulic oil overflows from the B port of the second sequence valve 13 to the T2 port of the valve block 18, maintaining the high-pressure stability of the tightening force of the left stabilizer cylinder 16 and the right stabilizer cylinder 17 during TBM construction. It can also limit the safety pressure value of the rodless chamber of the left stabilizer cylinder 16 and the right stabilizer cylinder 17 during the step-changing process of the TBM equipment to protect the stabilizer device.

[0033] As described above, the TBM stabilizer hydraulic control system of the present invention is suitable for use in stabilizer devices within TBM or shield machine mainframes. It primarily comprises a solenoid switch valve, a proportional pressure-reducing valve, a one-way valve, a solenoid reversing valve, a pressure-reducing valve, a balancing valve, and a sequence valve. This system, through the combined control of the proportional pressure-reducing valve, the pressure-reducing valve, and the solenoid reversing valve, achieves both low-pressure and high-pressure tensioning of the stabilizer cylinder, adapting to the multi-level pressure requirements during TBM excavation. The sequence valve set pressure can be adjusted based on actual operating conditions to maintain the stability of the stabilizer cylinder tensioning force and accommodate changes in load force caused by surrounding rock and mainframe vibration. Any device with the same application field as this hydraulic control system and that possesses some of its structures and functions shall be included within the scope of protection of the present invention.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A TBM stabilizer hydraulic control system, comprising a left stabilizer cylinder (16) and a right stabilizer cylinder (17) connected to a valve block (18), characterized in that: The valve block (18) includes an electromagnetic switch valve (1) connected to the P1 port of the valve block (18) and a pressure reducing valve (4) connected to the P2 port of the valve block (18); the electromagnetic switch valve (1) is connected to a proportional pressure reducing valve (2) via an oil circuit, the proportional pressure reducing valve (2) is respectively connected to the rod chamber and the rodless chamber of the left stabilizer oil cylinder (16) via a first valve group, and the pressure reducing valve (4) is respectively connected to the rod chamber and the rodless chamber of the right stabilizer oil cylinder (17) via a second valve group; a first sequence valve (10) is connected in parallel to the first valve group, and a second sequence valve (13) is connected in parallel to the second valve group; The first valve group includes a first electromagnetic reversing valve (6), wherein the P port of the first electromagnetic reversing valve (6) is connected to the oil outlet of the proportional pressure reducing valve (2) through a first one-way valve (3); the A port of the first electromagnetic reversing valve (6) is connected to the rodless cavity of the left stabilizer oil cylinder (16) through a second one-way valve (9); and the B port of the first electromagnetic reversing valve (6) is connected to the rod cavity of the left stabilizer oil cylinder (16) through a first balancing valve (8); The oil inlet of the first sequence valve (10) is connected to the oil outlet of the second one-way valve (9), the oil outlet of the first sequence valve (10) is connected to the T1 port of the valve block (18), the left oil control port of the first sequence valve (10) is connected to the oil inlet of the second one-way valve (9) and the oil control port of the first balancing valve (8); the right oil control port of the first sequence valve (10) is connected to the oil inlet of the first sequence valve (10); a spring is provided on the left side of the first sequence valve (10), and the pilot oil pressure of the left oil control port of the first sequence valve (10) is compared with the load pressure of its oil inlet. When the difference is greater than the spring setting value of the first sequence valve (10), the hydraulic oil overflows from the oil outlet of the first sequence valve (10) to the T1 port of the valve block (18); The second valve group includes a second electromagnetic reversing valve (7), wherein the P port of the second electromagnetic reversing valve (7) is connected to the oil outlet of the pressure reducing valve (4) through the third one-way valve (5); the A port of the second electromagnetic reversing valve (7) is connected to the rodless cavity of the right stabilizer oil cylinder (17) through the fourth one-way valve (12); and the B port of the second electromagnetic reversing valve (7) is connected to the rod cavity of the right stabilizer oil cylinder (17) through the second balancing valve (11); The oil inlet of the second sequence valve (13) is connected to the oil outlet of the fourth one-way valve (12), the oil outlet of the second sequence valve (13) is connected to the T2 port of the valve block (18), the left oil control port of the second sequence valve (13) is connected to the oil inlet of the fourth one-way valve (12) and the oil control port of the second balancing valve (11); the right oil control port of the second sequence valve (13) is connected to the oil inlet of the second sequence valve (13); a spring is provided on the left side of the second sequence valve (13), and the pilot oil pressure of the left oil control port of the second sequence valve (13) is compared with the load pressure of its oil inlet. When the difference between the two is greater than the spring setting value of the second sequence valve (13), oil overflows from the oil outlet of the second sequence valve (13) to the T2 port of the valve block (18).

2. The TBM stabilizer hydraulic control system according to claim 1, characterized in that: The oil outlet of the second one-way valve (9) is connected to the MA1 port of the valve block (18), and the MA1 port of the valve block (18) is provided with a first pressure sensor (14).

3. The TBM stabilizer hydraulic control system according to claim 2, characterized in that: The T port of the first electromagnetic reversing valve (6) and the C port of the proportional pressure reducing valve (2) are both connected to the T1 port of the valve block (18).

4. The TBM stabilizer hydraulic control system according to claim 3, characterized in that: The oil outlet of the fourth one-way valve (12) is connected to the MA2 port of the valve block (18), and the MA2 port of the valve block (18) is provided with a second pressure sensor (15); the T port of the second electromagnetic reversing valve (7) is connected to the T2 port of the valve block (18).

5. The TBM stabilizer hydraulic control system according to claim 4, characterized in that: The P1 port of the valve block (18) is connected to a high-pressure oil source, and the P2 port of the valve block (18) is connected to a low-pressure, high-flow oil source.

6. A control method for a TBM stabilizer hydraulic control system according to claim 5, characterized in that: Including TBM stabilizer cylinder low pressure tightening mode and TBM stabilizer cylinder high pressure tightening mode, When the TBM stabilizer cylinder is in low-pressure tightening mode, when the stabilizer cylinder is required to tighten the tunnel wall at low pressure during the TBM excavation process, the electromagnetic switch valve (1) loses power and is in a closed state, the proportional pressure reducing valve (2) signal is zero, and the first electromagnetic reversing valve (6) and the second electromagnetic reversing valve (7) are energized in parallel; the low-pressure and high-flow oil source flows into the A port of the pressure reducing valve (4) through the P2 port of the valve block (18), and the hydraulic oil flows out from the oil outlet of the pressure reducing valve (4) after being regulated by the pressure reducing valve (4). The hydraulic oil flowing out of the oil outlet of the pressure reducing valve (4) flows into the B port of the third one-way valve (5) through the A port of the third one-way valve (5), and the hydraulic oil flowing out of the B port of the third one-way valve (5) flows into the P port of the first electromagnetic reversing valve (6) and the P port of the second electromagnetic reversing valve (7) respectively. The hydraulic oil flows out from the A port of the first electromagnetic reversing valve (6) after passing through the first electromagnetic reversing valve (6). The hydraulic oil flowing out of the A port of the first electromagnetic reversing valve (6) flows to The second one-way valve (9) and the hydraulic oil flowing out of the A port of the first electromagnetic reversing valve (6) serve as the pilot oil and flow into the oil control port of the first balancing valve (8) and the left oil control port of the first sequence valve (10), and the first balancing valve (8) is opened; the hydraulic oil flowing out of the oil outlet of the second one-way valve (9) flows into the rodless chamber of the left stabilizer oil cylinder (16), and the left stabilizer oil cylinder (16) extends; the hydraulic oil in the rod chamber of the left stabilizer oil cylinder (16) flows into the B port of the first balancing valve (8), and the hydraulic oil flows out from the A port of the first balancing valve (8) through the B port of the first electromagnetic reversing valve (6), and the hydraulic oil flows out from the T port of the first electromagnetic reversing valve (6), and the hydraulic oil flows out from the T port of the first electromagnetic reversing valve (6) through the T1 port of the valve block (18) to the external oil tank; The hydraulic oil flows out of the A port of the second electromagnetic reversing valve (7) after passing through the A port of the second electromagnetic reversing valve (7). The hydraulic oil flows out of the A port of the second electromagnetic reversing valve (7) through the A port of the fourth one-way valve (12) in a positive direction. The hydraulic oil flows out of the oil outlet of the fourth one-way valve (12). At the same time, the hydraulic oil flows out of the A port of the second electromagnetic reversing valve (7) as the pilot oil into the oil control port of the second balancing valve (11) and the left oil control port of the second sequence valve (13). The second balancing valve (11) is opened, and the hydraulic oil flows out of the oil outlet of the fourth one-way valve (12) into the right stable The rodless chamber of the stabilizer oil cylinder (17) extends out of the right stabilizer oil cylinder (17); the hydraulic oil in the rod chamber of the right stabilizer oil cylinder (17) flows into the B port of the second balancing valve (11), and the hydraulic oil flows out from the A port of the second balancing valve (11) through the B port of the second electromagnetic reversing valve (7), and the hydraulic oil flows out from the T port of the second electromagnetic reversing valve (7) through the T2 port of the valve block (18) to the external oil tank; The first pressure sensor (14) detects the pressure of the rodless chamber of the left stabilizer oil cylinder (16), and the second pressure sensor (15) detects the pressure of the rodless chamber of the right stabilizer oil cylinder (17). After the left stabilizer oil cylinder (16) and the right stabilizer oil cylinder (17) extend and contact the hole wall, low-pressure tightening is achieved. At the same time, the pilot oil pressure of the left oil control port of the first sequence valve (10) is compared with the load pressure of its oil inlet. When the difference is greater than the spring setting value of the first sequence valve (10), the pressure of the pilot oil of the left oil control port is increased. When the hydraulic oil overflows from the oil outlet of the first sequence valve (10) to the T1 port of the valve block (18), the pilot oil pressure of the left oil control port of the second sequence valve (13) is compared with the load pressure of its oil inlet. When the difference between the two is greater than the spring setting value of the second sequence valve (13), the hydraulic oil overflows from the oil outlet of the second sequence valve (13) to the T2 port of the valve block (18), thereby maintaining the low pressure stability of the tensioning force of the left stabilizer cylinder (16) and the right stabilizer cylinder (17); When the TBM stabilizer cylinder is in high-pressure tightening mode: when the stabilizer cylinder is required to tighten the hole wall with high pressure during the step-changing process of the TBM, the left stabilizer cylinder (16) and the right stabilizer cylinder (17) are first extended quickly and at low pressure through the low-pressure tightening mode of the TBM stabilizer cylinder, and then the high-pressure tightening is switched according to the pressure values ​​detected by the first pressure sensor (14) and the second pressure sensor (15); at this time, the electromagnetic switch valve (1) is energized, and the proportional pressure reducing valve (2) is set according to the signal value given by the working condition, and the first The electromagnetic reversing valve (6) and the second electromagnetic reversing valve (7) are kept in parallel position and energized; the external high-pressure oil source flows into the A port of the electromagnetic switch valve (1) through the P1 port of the valve block (18), and the high-pressure hydraulic oil flows out from the B port of the electromagnetic switch valve (1). The hydraulic oil flowing out of the B port of the electromagnetic switch valve (1) flows into the A port of the proportional pressure reducing valve (2). The high-pressure hydraulic oil flows out from the oil outlet of the proportional pressure reducing valve (2) after being regulated. The high-pressure hydraulic oil flows into the At port A, the hydraulic oil flows out from port B after passing through the first one-way valve (3). The hydraulic oil flowing out of port B of the first one-way valve (3) flows into port P of the first electromagnetic reversing valve (6) and port P of the second electromagnetic reversing valve (7) respectively. Then, the high-pressure hydraulic oil enters the rodless cavity of the left stabilizer oil cylinder (16) and the right stabilizer oil cylinder (17), and the high pressure holds the hole wall tight. At the same time, the pilot oil pressure of the left oil control port of the first sequence valve (10) is compared with the load pressure of its oil inlet. When the difference is greater than the first sequence valve (10), When the spring setting value is reached, the hydraulic oil overflows from the oil outlet of the first sequence valve to the T1 port of the valve block (18). Similarly, the pilot oil pressure of the left oil control port of the second sequence valve (13) is compared with the load pressure of its oil inlet. When the difference between the two is greater than the spring setting value of the second sequence valve (13), the hydraulic oil overflows from the oil outlet of the second sequence valve (13) to the T2 port of the valve block (18), thereby maintaining the high pressure stability of the tensioning force of the left stabilizer cylinder (16) and the right stabilizer cylinder (17) during TBM construction.

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