Mud-water pressure balance shield tunneling machine

Abstract

The present invention relates to the field of shield tunneling, and specifically to a mud and water pressure balanced shield tunneling machine, comprising an outer shell, a cutter disc being arranged at one end of the outer shell, a segment assembly mechanism being arranged at the other end of the outer shell, a suction pipe being arranged inside the outer shell, and a partition being arranged inside the outer shell, a working chamber being formed between the side of the partition close to the cutter disc and the outer shell, and a balancing chamber being formed between the other side of the partition and the outer shell, a balancing mechanism being arranged in the balancing chamber, the balancing mechanism comprising a through hole connected to the outside of the outer shell and an auxiliary component being arranged on the partition for connecting the balancing chamber and the working chamber, the balancing mechanism guides external mud and water into the balancing chamber through the through hole and presses the mud and water into the working chamber through the auxiliary component, thereby balancing the internal and external pressures, so as to solve the problem in the prior art that the pressure is constant during the mud liquid transportation process, but when injected into the tunneling hole, the pressure changes due to the stress of the hole wall, and the pressure of the internal and external mud liquids is easily unbalanced to cause collapse.

Description

Technical Field

[0001] The invention relates to the technical field of shield tunneling, in particular to a mud-water pressure balanced shield tunneling machine. Background Art

[0002] A shield tunneling machine is a tunnel boring machine that uses the shield method. The shield construction method is that the tunnel boring machine builds (lays) the tunnel "shield" (referring to the supporting segments) while excavating, so it is different from the open construction method.

[0003] After searching, a Chinese patent discloses a mud-water pressure balancing device and a mud wall protection method (publication number CN117627562A). This patented technology is equipped with an automatic valve. During drilling, the automatic valve is closed, and the mud forms a protective layer on the hole wall to prevent collapse. During the drilling process, the automatic valve is opened to lower the mud level in the hole, thereby improving the stability and anti-destruction ability of the hole wall. However, the pressure of the mud is constant during transportation, and when it is injected into the excavated hole, the pressure changes due to the stress of the hole wall. The pressure of the mud inside and outside is easily unbalanced, causing collapse. Summary of the invention

[0004] In view of the above problems, an embodiment of the present invention provides a mud pressure balanced shield tunneling machine.

[0005] A mud and water pressure balanced shield tunneling machine provided in an embodiment of the present invention comprises an outer shell, a cutter disc is arranged at one end of the outer shell, a segment assembly mechanism is arranged at the other end of the outer shell, a suction pipe is arranged inside the outer shell, and a partition is also arranged inside the outer shell. A working chamber is formed between the side of the partition close to the cutter disc and the outer shell, and a balancing chamber is formed between the other side of the partition and the outer shell. A balancing mechanism is arranged in the balancing chamber. The balancing mechanism comprises a through hole connected to the outside of the outer shell and an auxiliary component arranged on the partition for connecting the balancing chamber and the working chamber. The balancing mechanism introduces external mud and water into the balancing chamber through the through hole and presses the mud and water into the working chamber through the auxiliary component to balance the internal and external pressures.

[0006] Optionally, the balancing mechanism also includes a mounting ring arranged on the partition, a balancing assembly is arranged on the outer peripheral surface of the mounting ring, the balancing assembly includes support blocks arranged at intervals on the mounting ring, a pressure regulating chamber is arranged in the support block and at one end away from the mounting ring, the pressure regulating chamber is connected to the outside through a through hole, a mounting plate is fixedly arranged in the pressure regulating chamber and close to the through hole, a support rod is arranged between the mounting plate and the inner wall of the opposite pressure regulating chamber, a pressure regulating plate is slidably arranged on the support rod, and the pressure regulating plate and the pressure regulating chamber are slidingly sealed, a through groove is opened on the side of the support rod close to the mounting plate, a through hole is opened on the side of the support block and away from the mounting plate, and the through hole connects the pressure regulating chamber and the balancing chamber.

[0007] Optionally, a gas storage cavity is provided on one side of the support block close to the mounting ring, a sliding seal is provided in the gas storage cavity with an extrusion plate, a connecting rod is provided on one side of the extrusion plate, the connecting rod penetrates into the pressure regulating cavity and is fixed to the pressure regulating plate, and the gas storage cavity on the other side of the extrusion plate is filled with an inert gas;

[0008] An adjusting chamber connected with the balancing chamber is arranged on one side of the supporting block on the mounting ring, an adjusting block is slidingly sealed in the adjusting chamber, a guide hole is connected between the gas storage chamber and the adjusting chamber, a positioning rod is slidingly fitted on the adjusting block, the positioning rod is fixedly connected with the adjusting chamber, and a first spring is arranged between the positioning rod and the adjusting block; when the extrusion plate squeezes the inert gas, the inert gas enters the adjusting chamber through the guide hole and pushes the adjusting block, and then compresses the space in the balancing chamber through the adjusting block.

[0009] Optionally, an airbag is embedded and installed on the side of the adjustment block close to the balance cavity. An injection tube is provided on the airbag. The injection tube passes through the adjustment block and is connected to the inside of the adjustment cavity. The sliding seal in the injection tube is matched with a sealing rod, and the sealing rod is fixed to the adjustment cavity.

[0010] Optionally, the auxiliary component includes a guide tube for connecting the balancing chamber and the working chamber, a fixed plate is arranged in the guide tube, an adjustment plate is arranged in the guide tube and in close contact with the fixed plate, the adjustment plate is rotatably connected to the guide tube through a rotating unit, and evenly distributed adjustment holes are provided on the fixed plate and the adjustment plate;

[0011] The outlet pipe is connected to the regulating chamber via a guide pipe, in which a pneumatic unit is arranged, and the pneumatic unit is transmission-connected with the rotating unit. When the inert gas enters the regulating chamber from the gas storage chamber, the inert gas flows into the guide pipe to push the pneumatic unit and then drives the regulating plate to rotate through the rotating unit, thereby completing the adjustment of the relative area between the regulating plate and the regulating hole on the fixed plate.

[0012] Optionally, the rotating unit includes a mounting shell arranged in the guide tube, a rotating shaft is rotatably arranged in the mounting shell, one end of the rotating shaft passes through the mounting shell and is fixedly connected to the adjustment plate, a gear is arranged on the rotating shaft and located in the mounting shell, a slide plate is slidably arranged in the mounting shell, and a rack meshing with the gear is arranged on the slide plate.

[0013] Optionally, the pneumatic unit includes a trigger chamber connected to the guide tube, a trigger plate is slidably fitted on the inner wall of the trigger chamber, a mounting rod is provided on the trigger plate, and the mounting rod is fixed to the slide plate; a second spring is provided on the mounting rod and between the trigger plate and the trigger chamber.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By setting up a balancing component and a partition, when the external mud and water pressure is greater than the mud and water pressure in the balancing chamber, the adjusting block can be lifted up to reduce the internal space of the balancing chamber, increase the pressure of the mud and water inside the balancing chamber, and achieve the effect of adaptively adjusting the balance of external and internal mud and water pressures. When the internal mud and water pressure is greater than the external mud and water pressure, the pressure regulating plate can release the mud and water inside the balancing chamber through the through groove when it moves to the through groove, thereby achieving the effect of releasing pressure and achieving pressure balance.

[0016] As more inert gas is injected into the adjusting chamber, the adjusting block can be gradually lifted to reduce the internal space of the balancing chamber and increase the pressure of the mud and water inside the balancing chamber. Part of the inert gas can be injected into the trigger chamber through the guide tube, thereby pushing the trigger plate to move up along the inner wall of the trigger chamber, and driving the slide plate to move the rack and drive the gear to rotate. Therefore, the rotation of the adjusting plate changes the connecting area between the adjusting hole on the adjusting plate and the adjusting hole on the fixed plate, thereby changing the speed at which the mud and water are discharged from the outlet pipe, which can further adjust the pressure inside the balancing chamber, achieve the effect of adaptively adjusting the balance of external and internal mud and water pressures, and can achieve the effect of multiple balancing adjustments, thereby increasing the range of balancing pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a slurry pressure balance shield tunneling machine provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the arrangement structure between the partition plate and the housing provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the distribution between the balancing components and the auxiliary components provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the connection between the balancing assembly and the mounting ring provided in an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the distribution of the pressure regulating chamber and the regulating chamber provided in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the connection between the auxiliary component and the regulating cavity provided in an embodiment of the present invention;

[0024] Figure 7 A schematic structural diagram of the gear, rack, rotating shaft and adjustment plate provided in an embodiment of the present invention.

[0025] Among them, 1. shell; 2. cutter head; 3. pipe segment assembly mechanism; 4. suction pipe; 5. partition; 6. balance mechanism; 7. through hole; 8. auxiliary component; 9. mounting ring; 10. balance component; 11. support block; 12. pressure regulating chamber; 13. mounting plate; 14. support rod; 15. pressure regulating plate; 16. through groove; 17. through hole; 18. air storage chamber; 19. extrusion plate; 20. connecting rod; 21. regulating chamber; 2 2. Adjustment block; 23. Guide hole; 24. Positioning rod; 25. First spring; 26. Airbag; 27. Injection tube; 28. Sealing rod; 29. ​​Export tube; 30. Fixing plate; 31. Adjustment plate; 32. Adjustment hole; 33. Guide tube; 34. Mounting shell; 35. Rotating shaft; 36. Gear; 37. Slide plate; 38. Rack; 39. Trigger chamber; 40. Trigger plate; 41. Mounting rod; 42. Second spring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0027] See also Figure 1-Figure 7 A mud water pressure balanced shield tunneling machine provided by an embodiment of the present invention comprises a shell 1, a cutter disc 2 is arranged at one end of the shell 1, a segment assembly mechanism 3 is arranged at the other end of the shell 1, a suction pipe 4 is arranged inside the shell 1, and a partition 5 is also arranged inside the shell 1. A working chamber is formed between the side of the partition 5 close to the cutter disc 2 and the shell 1, and a balancing chamber is formed between the other side of the partition 5 and the shell 1. A balancing mechanism 6 is arranged in the balancing chamber. The balancing mechanism 6 comprises a through hole 7 connected to the outside of the shell 1 and an auxiliary component 8 arranged on the partition 5 for connecting the balancing chamber and the working chamber. The balancing mechanism 6 introduces external mud water into the balancing chamber through the through hole 7 and presses the mud water into the working chamber through the auxiliary component 8, or introduces the mud water in the working chamber into the balancing chamber through the auxiliary component 8 and then discharges it to the outside through the through hole 7, thereby balancing the internal and external pressures.

[0028] During implementation, the balancing mechanism 6 also includes a mounting ring 9 arranged on the partition 5, and a balancing assembly 10 is arranged on the outer peripheral surface of the mounting ring 9. The balancing assembly 10 includes a support block 11 arranged at intervals on the mounting ring 9, and a pressure regulating chamber 12 is arranged in the support block 11 and at one end away from the mounting ring 9. The pressure regulating chamber 12 is connected to the outside through the through hole 7, and a mounting plate 13 is fixedly arranged in the pressure regulating chamber 12 and close to the through hole 7. A support rod 14 is arranged between the mounting plate 13 and the inner wall of the opposite pressure regulating chamber 12, and a pressure regulating plate 15 is slidably arranged on the support rod 14, and the pressure regulating plate 15 and the pressure regulating chamber 12 are slidably sealed. A through groove 16 is opened on the side of the support rod 14 close to the mounting plate 13, and a through hole 17 is opened on the side of the support block 11 and away from the mounting plate 13. The through hole 17 connects the pressure regulating chamber 12 with the balancing chamber.

[0029] The interior of the balance chamber is used for the ground mud and water conveying system, which conveys the mud and water to the balance chamber and then guides it into the working chamber through the auxiliary component 8. During the excavation process of the cutter head 2, the mud and water are guided from the working chamber into the excavated aperture, so that the mud and water are not only used to balance the water and soil pressure of the soil layer on the excavation surface, but also form an impermeable cement film on the surface of the soil layer on the excavation surface, so that the mud and water pressure can play an effective supporting role. In addition, the fine clay particles in the mud and water penetrate into the soil layer to a certain depth in a very short time, further improving the bearing capacity of the soil layer.

[0030] During the advancement of the cutter disc 2 and the outer shell 1, the external pressure can enter the pressure regulating chamber 12 by introducing mud and water into the borehole, and apply pressure to the pressure regulating plate 15 through the external mud and water. At this time, the external mud and water pressure is greater than the internal mud and water pressure, thereby pushing the pressure regulating plate 15 to move toward the mounting ring 9. Conversely, the internal mud and water pushes the pressure regulating plate 15 away from the mounting ring 9.

[0031] In practice, a gas storage chamber 18 is provided on one side of the support block 11 near the mounting ring 9, and a sliding seal is provided in the gas storage chamber 18 with an extrusion plate 19, and a connecting rod 20 is provided on one side of the extrusion plate 19, and the connecting rod 20 penetrates into the pressure regulating chamber 12 and is fixed to the pressure regulating plate 15, and the gas storage chamber 18 on the other side of the extrusion plate 19 is filled with an inert gas;

[0032] An adjusting chamber 21 connected to the balancing chamber is provided on one side of the supporting block 11 on the mounting ring 9, an adjusting block 22 is slidably sealed in the adjusting chamber 21, a guide hole 23 is connected between the air storage chamber 18 and the adjusting chamber 21, a positioning rod 24 is slidably fitted on the adjusting block 22, the positioning rod 24 is fixedly connected to the adjusting chamber 21, and a first spring 25 is provided between the positioning rod 24 and the adjusting block 22; when the extrusion plate 19 squeezes the inert gas, the inert gas enters the adjusting chamber 21 through the guide hole 23 and pushes the adjusting block 22, thereby compressing the space in the balancing chamber through the adjusting block 22.

[0033] During implementation, an airbag 26 is embedded and installed on the side of the adjustment block 22 close to the balance chamber. An injection tube 27 is provided on the airbag 26. The injection tube 27 passes through the adjustment block 22 and is connected to the inside of the adjustment chamber 21. The sliding seal in the injection tube 27 is matched with a sealing rod 28, and the sealing rod 28 is fixed to the adjustment chamber 21.

[0034] When the external muddy water pressure is greater than the internal muddy water pressure, the pressure regulating plate 15 can be pushed to move toward the mounting ring 9. At this time, the extrusion plate 19 can be driven by the connecting rod 20 to squeeze the inert gas stored in the gas storage chamber 18. The squeezed inert gas is injected into the inside of the regulating chamber 21 through the guide hole 23. Under normal conditions, the position of the regulating block 22 can be maintained under the action of the first spring 25, so that the sealing rod 28 blocks the injection pipe 27. As the amount of inert gas injected into the regulating chamber 21 increases, the regulating block 22 is gradually lifted up to reduce the internal space of the balancing chamber, increase the pressure of the muddy water inside the balancing chamber, and achieve the effect of adaptively adjusting the pressure balance between the external and internal muddy water.

[0035] The positioning rod 24 is used to limit the moving distance of the adjustment block 22 to prevent the adjustment block 22 from being pushed out of the adjustment cavity 21. When the adjustment block 22 reaches the maximum adjustment distance, the sealing rod 28 is separated from the injection pipe 27, and the inert gas can be injected into the airbag 26 through the injection pipe 27, thereby inflating the airbag 26 to further reduce the internal space of the balance cavity and increase the adjustment range.

[0036] When the internal muddy water pushes the pressure regulating plate 15 away from the mounting ring 9, the pressure regulating plate 15 moves to the through groove 16 and can release the muddy water inside the balance cavity through the through groove 16, thereby achieving the effect of releasing pressure and achieving pressure balance.

[0037] In the implementation, the auxiliary component 8 includes an outlet pipe 29 for connecting the balancing chamber and the working chamber, a fixed plate 30 is arranged in the outlet pipe 29, an adjustment plate 31 is arranged in the outlet pipe 29 and in close contact with the fixed plate 30, the adjustment plate 31 is rotatably connected to the outlet pipe 29 through a rotating unit, and uniformly distributed adjustment holes 32 are provided on the fixed plate 30 and the adjustment plate 31;

[0038] The outlet pipe 29 is connected to the regulating chamber 21 via a guide pipe 33, in which a pneumatic unit is arranged, and the pneumatic unit is transmission-connected with the rotating unit. When the inert gas enters the regulating chamber 21 from the gas storage chamber 18, the inert gas flows into the guide pipe 33 to push the pneumatic unit and then drives the regulating plate 31 to rotate through the rotating unit, thereby completing the adjustment of the relative area between the regulating plate 31 and the regulating hole 32 on the fixed plate 30.

[0039] During implementation, the rotating unit includes a mounting shell 34 arranged in the guide tube 33, a rotating shaft 35 is rotatably arranged in the mounting shell 34, one end of the rotating shaft 35 passes through the mounting shell 34 and is fixedly connected to the adjustment plate 31, a gear 36 is arranged on the rotating shaft 35 and located in the mounting shell 34, a slide plate 37 is slidably arranged in the mounting shell 34, and a rack 38 meshing with the gear 36 is arranged on the slide plate 37.

[0040] During implementation, the pneumatic unit includes a trigger chamber 39 connected to the guide tube 33, and a trigger plate 40 is slidably fitted on the inner wall of the trigger chamber 39. A mounting rod 41 is provided on the trigger plate 40, and the mounting rod 41 is fixed to the slide plate 37; a second spring 42 is provided on the mounting rod 41 and located between the trigger plate 40 and the inner wall of the trigger chamber 39.

[0041] When the adjustment block 22 reaches the maximum adjustment distance, the adjustment block 22 no longer blocks the guide tube 33, and part of the inert gas injected into the adjustment chamber 21 can be injected into the trigger chamber 39 through the guide tube 33, thereby pushing the trigger plate 40 to move up along the inner wall of the trigger chamber 39. In this process, the mounting rod 41 can be driven to move up, thereby driving the slide plate 37 to move up synchronously, so that it drives the rack 38 to drive the gear 36 to rotate. During the rotation of the gear 36, the shaft 35 can be driven to rotate. During the rotation of the shaft 35, the adjustment plate 31 can be driven to rotate. The connection area between the adjustment hole 32 on the adjustment plate 31 and the adjustment hole 32 on the fixed plate 30 is changed by the rotation of the adjustment plate 31, thereby changing the speed at which the muddy water is discharged from the outlet pipe 29, and the pressure inside the balance chamber can be further adjusted.

[0042] During the working process, when the cutter head 2 and the outer shell 1 are pushed forward, the external pressure can press the muddy water introduced into the borehole into the pressure regulating chamber 12 and apply pressure to the pressure regulating plate 15 through the external muddy water. At this time, the external muddy water pressure is greater than the internal muddy water pressure, thereby pushing the pressure regulating plate 15 to move toward the mounting ring 9 to squeeze the internal space of the balancing chamber. At the same time, the connecting rod 20 drives the squeezing plate 19 to squeeze the inert gas stored in the air storage chamber 18. The squeezed inert gas is injected into the interior of the regulating chamber 21 through the guide hole 23. As the amount of inert gas injected into the regulating chamber 21 increases, the regulating block 22 can be gradually lifted to reduce the internal space of the balancing chamber and increase the pressure of the muddy water inside the balancing chamber. When the regulating block 22 reaches the maximum adjustment distance, the sealing rod 28 is separated from the injection pipe 27, and the inert gas can be injected into the airbag through the injection pipe 27 26, thereby inflating the airbag 26 to further reduce the internal space of the balance chamber; at the same time, when the adjustment block 22 reaches the maximum adjustment distance, the adjustment block 22 no longer blocks the guide tube 33, and part of the inert gas injected into the adjustment chamber 21 can be injected into the trigger chamber 39 through the guide tube 33, thereby pushing the trigger plate 40 to move up along the inner wall of the trigger chamber 39, and in this process, the mounting rod 41 is driven to move up, thereby driving the slide plate 37 to move up synchronously, driving the rack 38 to drive the gear 36 to rotate, and in the process of the gear 36 rotating, the shaft 35 can be driven to rotate, and in the process of the shaft 35 rotating, the adjustment plate 31 can be driven to rotate, thereby changing the communication area between the adjustment hole 32 on the adjustment plate 31 and the adjustment hole 32 on the fixing plate 30, changing the speed at which the outlet pipe 29 discharges muddy water, and further increasing the range of the balance pressure;

[0043] When the internal mud and water pressure is greater than the external mud and water pressure, the internal mud and water push the pressure regulating plate 15 away from the mounting ring 9. When the pressure regulating plate 15 moves to the through groove 16, the mud and water inside the balance chamber can be released through the through groove 16, thereby achieving the effect of releasing pressure and achieving pressure balance. At the same time, the adjusting block 22 and the adjusting plate 31 are reset under the action of the first spring 25 and the second spring 42.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A slurry pressure balance shield tunneling machine, comprising a shell, a cutter head is arranged at one end of the shell, a segment assembly mechanism is arranged at the other end of the shell, and a suction pipe is arranged inside the shell, characterized in that: A partition is also provided inside the shell, a working chamber is formed between the side of the partition close to the cutter disc and the shell, and a balancing chamber is formed between the other side of the partition and the shell. A balancing mechanism is provided in the balancing chamber, and the balancing mechanism includes a through hole connected to the outside of the shell and an auxiliary component provided on the partition for connecting the balancing chamber and the working chamber. The balancing mechanism guides external muddy water into the balancing chamber through the through hole and presses the muddy water into the working chamber through the auxiliary component to balance the internal and external pressures. The balancing mechanism also includes a mounting ring arranged on the partition, a balancing assembly is arranged on the outer peripheral surface of the mounting ring, and the balancing assembly includes support blocks arranged at intervals on the mounting ring, a pressure regulating chamber is arranged in the support block and at one end away from the mounting ring, the pressure regulating chamber is connected to the outside through a through hole, a mounting plate is fixedly arranged in the pressure regulating chamber and close to the through hole, a support rod is arranged between the mounting plate and the inner wall of the opposite pressure regulating chamber, a pressure regulating plate is slidably arranged on the support rod, and the pressure regulating plate and the pressure regulating chamber are slidably sealed, a through groove is opened on the side of the support rod close to the mounting plate, a through hole is opened on the side of the support block and away from the mounting plate, and the through hole connects the pressure regulating chamber and the balancing chamber.

2. The slurry pressure balanced shield tunneling machine according to claim 1, characterized in that: An air storage cavity is arranged on one side of the support block close to the mounting ring, and an extrusion plate is provided in the air storage cavity for sliding sealing. A connecting rod is arranged on one side of the extrusion plate, and the connecting rod penetrates into the pressure regulating cavity and is fixed to the pressure regulating plate. The air storage cavity on the other side of the extrusion plate is filled with inert gas. An adjusting chamber connected with the balancing chamber is arranged on one side of the supporting block on the mounting ring, an adjusting block is slidingly sealed in the adjusting chamber, a guide hole is connected between the gas storage chamber and the adjusting chamber, a positioning rod is slidingly fitted on the adjusting block, the positioning rod is fixedly connected with the adjusting chamber, and a first spring is arranged between the positioning rod and the adjusting block; when the extrusion plate squeezes the inert gas, the inert gas enters the adjusting chamber through the guide hole and pushes the adjusting block, and then compresses the space in the balancing chamber through the adjusting block.

3. The slurry pressure balance shield tunneling machine according to claim 2, characterized in that: An airbag is embedded and installed on the side of the regulating block close to the balancing cavity. An injection tube is arranged on the airbag. The injection tube passes through the regulating block and is connected to the inside of the regulating cavity. A sealing rod is provided in the sliding seal of the injection tube, and the sealing rod is fixed to the regulating cavity.

4. The slurry pressure balance shield tunneling machine according to claim 2, characterized in that: The auxiliary component includes a guide tube for connecting the balance chamber and the working chamber, a fixed plate is arranged in the guide tube, an adjustment plate is arranged in the guide tube and in close contact with the fixed plate, the adjustment plate is rotatably connected to the guide tube through a rotating unit, and evenly distributed adjustment holes are provided on the fixed plate and the adjustment plate; The outlet pipe is connected to the regulating chamber via a guide pipe, in which a pneumatic unit is arranged, and the pneumatic unit is transmission-connected with the rotating unit. When the inert gas enters the regulating chamber from the gas storage chamber, the inert gas flows into the guide pipe to push the pneumatic unit and then drives the regulating plate to rotate through the rotating unit, thereby completing the adjustment of the relative area between the regulating plate and the regulating hole on the fixed plate.

5. The slurry pressure balanced shield tunneling machine according to claim 4, characterized in that: The rotating unit includes a mounting shell arranged in the guide tube, a rotating shaft is rotatably arranged in the mounting shell, one end of the rotating shaft passes through the mounting shell and is fixedly connected to the adjustment plate, a gear is arranged on the rotating shaft and located in the mounting shell, a slide plate is slidably arranged in the mounting shell, and a rack meshing with the gear is arranged on the slide plate.

6. The slurry pressure balance shield tunneling machine according to claim 5, characterized in that: The pneumatic unit includes a trigger chamber connected to the guide tube, a trigger plate is slidably fitted on the inner wall of the trigger chamber, a mounting rod is arranged on the trigger plate, and the mounting rod is fixed to the slide plate; a second spring is arranged on the mounting rod and between the trigger plate and the trigger chamber.

Images