Air cushion type direct slurry discharge shield

Abstract

The utility model relates to the technical field of slurry shield construction, in particular to an air cushion type direct-discharge slurry shield which comprises a cutterhead, a slurry bin and an air cushion bin, one side of the cutterhead is in bolted connection with the slurry bin, and the outer portion of the slurry bin is in bolted connection with a front partition plate for separating the slurry bin from the air cushion bin. A slurry discharging pipeline for discharging slag slurry in the muddy water bin out of the tunnel is inserted into the bottom of the muddy water bin, and a rear partition plate is fixed to the side, away from the front partition plate, of the air cushion bin through bolts; according to the slurry shield tunneling machine, the cutter head, the slurry bin, the air cushion bin, the air inlet pipeline, the exhaust pipeline, the slurry inlet pipeline, the right side air pressure communicating pipe, the left side air pressure communicating pipe, the right side bottom washing pipeline, the left side bottom washing pipeline, the slurry discharging pipeline and the pressure maintaining system are arranged; the pressure of slurry in the slurry bin is difficult to control, and stratum collapse is easily caused.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry shield construction, in particular to an air cushion type direct discharge slurry shield. Background Art

[0002] The slurry circulation system is an important system of the slurry shield machine. The conventional straight-discharge slurry shield machine has good slag discharge performance and high excavation efficiency during the excavation process. However, the pressure of the slurry in the slurry bin is unstable and fluctuates during the excavation process. For the air-cushion pure slurry shield, the slag must first pass through the air-cushion bin and then be discharged into the shield body. In addition, there is a lot of scouring in the air-cushion bin. After entering the air-cushion bin, the slurry enters the slurry discharge pipeline without being fully mixed with the slag, resulting in low slurry utilization.

[0003] Patent No. 202221764965.4 discloses a slurry shield machine, which uses a spiral unit to lift slag, and after crushing it through a crusher, it is discharged through a second row of slurry pipes, with high slag discharge efficiency and high excavation efficiency.

[0004] However, when the existing slurry shield machine is used, the mud pressure in the slurry bin fluctuates, and the slurry pressure in the slurry bin cannot be actively controlled. The mud pressure in the slurry bin is unstable, which can easily lead to ground collapse. Therefore, an air cushion type direct discharge slurry shield is set up. Summary of the Invention

[0005] The main purpose of the utility model is to provide an air cushion type direct discharge mud and water shield. The utility model solves the problem that the existing mud and water shield machine is difficult to control the mud pressure in the mud and water bin during use, which easily leads to ground collapse, by arranging a cutter head, a mud and water bin, an air cushion bin, an air intake pipe, an exhaust pipe, a slurry intake pipe, a right air pressure connecting pipe, a left air pressure connecting pipe, a right bottom flushing pipe, a left bottom flushing pipe, a slurry discharge pipe and a pressure maintaining system.

[0006] The technical solution adopted by the utility model to solve its technical problems is an air cushion type direct discharge mud and water shield, including a cutter disc, a mud and water bin and an air cushion bin, one side of the cutter disc is bolted to the mud and water bin, the outside of the mud and water bin is bolted to a front partition that separates the mud and water bin from the air cushion bin, the bottom of the mud and water bin is plugged with a discharge pipe for discharging the slurry in the mud and water bin to the outside of the tunnel, the side of the front partition away from the air cushion bin is bolted to a rear partition, one side of the mud and water bin is plugged with a slurry feed pipe for transporting mud outside the tunnel to the mud and water bin, and the slurry feed pipe passes through the front partition and the rear partition, the upper part of the mud and water bin is plugged with a right air pressure connecting pipe and a left air pressure connecting pipe. Connecting pipe, and the end of the right air pressure connecting pipe away from the mud and water bin extends to the lower right side of the air cushion bin, and the end of the left air pressure connecting pipe away from the mud and water bin extends to the lower left side of the air cushion bin, the outside of the air cushion bin is plugged with a right bottom flushing pipe and a left bottom flushing pipe, and the right bottom flushing pipe and the left bottom flushing pipe are both connected to the slurry inlet pipe, the outside of the air cushion bin is plugged with an air intake pipe and an exhaust pipe, and the air intake pipe is located on the upper side of the exhaust pipe, the air intake pipe and the exhaust pipe both extend through the upper part of the rear partition, and the air intake pipe and the exhaust pipe are provided with a pressure maintaining system for controlling the air pressure above the air cushion bin at one end away from the air cushion bin.

[0007] By adopting the above technical solution, the slurry pressure in the slurry bin is actively controlled during the excavation process to keep the pressure stable. At the same time, it also has the characteristics of high excavation efficiency of the direct-discharge slurry shield.

[0008] Specifically, the cross-section of the air cushion bin is a fan-shaped structure, the inlet of the slurry inlet pipe is located at the upper part of the rear partition, the inlets of the right air pressure connecting pipe and the left air pressure connecting pipe are located at the upper part of the front partition, the inlets of the air intake pipe and the exhaust pipe are at the top of the rear partition, the inlet of the slurry discharge pipe is located at the bottom of the front partition, and the inlets of the right bottom flushing pipe and the left bottom flushing pipe are located at the bottom of the rear partition.

[0009] By adopting the above technical solution, the cross-section of the air cushion chamber is fan-shaped. During the excavation process, the upper part of the air cushion chamber is pressurized air and the lower part is mud.

[0010] Specifically, the outer bolts of the exhaust pipe are connected to an automatic exhaust ball valve for reducing the air pressure in the air cushion chamber, and one side of the intake pipe is connected to an automatic intake ball valve for increasing the air pressure in the air cushion chamber.

[0011] By adopting the above technical solution, the automatic exhaust ball valve on the exhaust pipe controls the output of pressurized gas from the air cushion chamber;

[0012] The automatic air inlet ball valve on the air inlet pipe controls the input of pressurized gas into the air cushion chamber.

[0013] Specifically, one side of the slurry inlet pipeline is bolted with a slurry inlet ball valve that allows the slurry to enter the mud and water bin.

[0014] By adopting the above technical solution, the slurry inlet ball valve on the slurry inlet pipeline controls the entry of slurry into the mud and water tank.

[0015] Specifically, a slurry discharge ball valve is provided on one side of the slurry discharge pipeline to discharge the slurry.

[0016] By adopting the above technical solution, the slurry discharge ball valve on the slurry discharge pipeline controls the discharge of slurry in the slurry discharge pipeline.

[0017] Specifically, the outside of the right air pressure connecting pipe is bolted to the right air pressure connecting pipe gate valve, and one side of the left air pressure connecting pipe is bolted to the left air pressure connecting pipe gate valve.

[0018] By adopting the above technical solution, the right side air pressure connecting pipe gate valve can control the upper pressure of the mud and water tank to be transmitted to the right side of the air cushion tank;

[0019] The air pressure connecting pipe gate valve on the left side can control the pressure on the upper part of the mud and water tank to be transmitted to the left side of the air cushion tank.

[0020] Specifically, the left bottom flushing pipeline is externally bolted to a left bottom flushing ball valve, and the right bottom flushing pipeline is externally bolted to a right bottom flushing ball valve.

[0021] By adopting the above technical solution, the left bottom flushing ball valve on the left bottom flushing pipeline can control the mud in the slurry inlet pipeline to enter the left bottom of the air cushion chamber;

[0022] The right bottom flushing ball valve on the right bottom flushing pipeline can control the mud in the slurry inlet pipeline to enter the left bottom of the air cushion tank.

[0023] Beneficial effects of the utility model:

[0024] The utility model discloses an air cushion type direct discharge mud and water shield, which is provided with two groups of air pressure connecting pipes. The right air pressure connecting pipe and the left air pressure connecting pipe connect the mud pressure in the mud and water bin with the pressure of the air cushion bin, so that the pressures of the two are kept consistent.

[0025] The utility model describes an air cushion type direct discharge mud and water shield, in which there is pressurized air on the upper part of the air cushion bin and mud at the bottom, and the pressures of the two are the same. When the mud pressure in the mud and water bin suddenly increases or decreases, due to the action of the air pressure connecting pipe, the mud pressure at the bottom of the air cushion bin also changes accordingly. The pressure maintaining system can control the discharge or injection of air on the upper part of the air cushion bin to stabilize the air pressure on the upper part of the air cushion bin, and the air pressure on the upper part of the air cushion bin is the same as the mud pressure at the bottom, thereby achieving the purpose of controlling the mud pressure in the mud and water bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall structure of an air cushion type direct discharge slurry shield of the utility model;

[0028] Figure 2 This is a schematic diagram of the cross-sectional structure of an air cushion type direct discharge slurry shield of the utility model;

[0029] In the figure: 1. Cutter head; 2. Mud and water tank; 3. Air cushion tank; 4. Air inlet pipe; 41. Automatic air inlet ball valve; 5. Exhaust pipe; 51. Automatic exhaust ball valve; 6. Slurry inlet pipe; 61. Slurry inlet ball valve; 7. Right air pressure connecting pipe; 71. Right air pressure connecting pipe gate valve; 8. Left air pressure connecting pipe; 81. Left air pressure connecting pipe gate valve; 9. Right bottom flushing pipe; 91. Right bottom flushing ball valve; 10. Left bottom flushing pipe; 101. Left bottom flushing ball valve; 11. Slurry discharge pipe; 111. Slurry discharge ball valve; 12. Pressure maintaining system; 13. Front partition; 14. Rear partition. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] In order to improve the excavation efficiency, as an embodiment of the present invention, Figure 1 、 Figure 2 As shown, the utility model describes an air cushion type direct discharge mud and water shield, comprising a cutter head 1, a mud and water bin 2 and an air cushion bin 3, one side of the cutter head 1 is bolted to the mud and water bin 2, the outer side of the mud and water bin 2 is bolted to a front partition 13 that separates the mud and water bin 2 from the air cushion bin 3, a slurry discharge pipe 11 for discharging the slurry in the mud and water bin 2 to the outside of the tunnel is plugged into the bottom of the mud and water bin 2, a side of the air cushion bin 3 away from the front partition 13 is bolted to a rear partition 14, one side of the mud and water bin 2 is plugged with a slurry inlet pipe 6 for transporting mud outside the tunnel to the mud and water bin 2, and the slurry inlet pipe 6 passes through the front partition 13 and the rear partition 14, the upper part of the mud and water bin 2 is plugged with a right air pressure connecting pipe 7 and a left air pressure connecting pipe 8, and The right side air pressure connecting pipe 7 extends to the lower right side of the air cushion bin 3 at one end away from the mud and water bin 2, and the left side air pressure connecting pipe 8 extends to the lower left side of the air cushion bin 3 at one end away from the mud and water bin 2. The right side bottom flushing pipe 9 and the left side bottom flushing pipe 10 are connected to the outside of the air cushion bin 3, and the right side bottom flushing pipe 9 and the left side bottom flushing pipe 10 are both connected to the slurry inlet pipe 6. The air intake pipe 4 and the exhaust pipe 5 are connected to the outside of the air cushion bin 3, and the air intake pipe 4 is located on the upper side of the exhaust pipe 5. The air intake pipe 4 and the exhaust pipe 5 both extend through the upper part of the rear partition 14, and the air intake pipe 4 and the exhaust pipe 5 are both provided with a pressure maintaining system 12 for controlling the air pressure above the air cushion bin 3 at the end away from the air cushion bin 3.

[0032] When in use, the slurry pressure in the slurry bin 2 is actively controlled during the excavation process to keep the pressure stable. At the same time, it also has the characteristics of high excavation efficiency of the direct-discharge slurry shield.

[0033] In order to separate the pressurized air and the mud, for example, Figure 1 As shown, the utility model also includes that the cross-section of the air cushion bin 3 is a fan-shaped structure, the inlet of the slurry inlet pipe 6 is located at the upper part of the rear partition 14, the inlets of the right air pressure connecting pipe 7 and the left air pressure connecting pipe 8 are located at the upper part of the front partition 13, the inlets of the air intake pipe 4 and the exhaust pipe 5 are at the top of the rear partition 14, the inlet of the slurry discharge pipe 11 is located at the bottom of the front partition 13, and the inlets of the right bottom flushing pipe 9 and the left bottom flushing pipe 10 are located at the bottom of the rear partition 14.

[0034] When in use, the cross section of the air cushion chamber 3 is fan-shaped. During the excavation process, the upper part of the air cushion chamber 3 is pressurized air and the lower part is mud.

[0035] In order to control the output and input of pressurized gas in the air cushion chamber 3, for example, Figure 1 As shown, the present invention also includes that the exhaust pipe 5 is externally bolted with an automatic exhaust ball valve 51 for reducing the air pressure in the air cushion chamber 3 , and one side of the intake pipe 4 is bolted with an automatic intake ball valve 41 for increasing the air pressure in the air cushion chamber 3 .

[0036] When in use, the automatic exhaust ball valve 51 on the exhaust line 5 controls the output of pressurized gas from the air cushion chamber 3;

[0037] The automatic air inlet ball valve 41 on the air inlet pipeline 4 controls the input of pressurized gas into the air cushion chamber 3 .

[0038] In order to control the entry of mud into the mud and water tank 2, for example, Figure 1 As shown, the present invention further includes a slurry inlet ball valve 61 bolted to one side of the slurry inlet pipeline 6 for allowing the slurry to enter the mud and water bin 2 .

[0039] When in use, the slurry inlet ball valve 61 on the slurry inlet pipeline 6 controls the entry of slurry into the mud and water bin 2 .

[0040] In order to control the discharge of slurry in the slurry discharge pipeline 11, for example, Figure 1 As shown, the present invention further includes that a slurry discharge ball valve 111 is provided on one side of the slurry discharge pipeline 11 for discharging the slurry.

[0041] When in use, the slurry discharge ball valve 111 on the slurry discharge pipeline 11 controls the discharge of slurry in the slurry discharge pipeline 11 .

[0042] In order to control the pressure on the upper part of the mud and water tank 2 to be transmitted to the left side of the air cushion tank 3, for example, Figure 1As shown, the present invention further includes that the outside of the right air pressure connecting pipe 7 is bolted to a right air pressure connecting pipe gate valve 71 , and one side of the left air pressure connecting pipe 8 is bolted to a left air pressure connecting pipe gate valve 81 .

[0043] When in use, the right side air pressure connecting pipe gate valve 71 can control the upper pressure of the mud and water tank 2 to be transmitted to the right side of the air cushion tank 3;

[0044] The left side air pressure connecting pipe gate valve 81 can control the upper pressure of the mud and water tank 2 to be transmitted to the left side of the air cushion tank 3.

[0045] In order to control the mud in the slurry inlet pipe 6 to enter the bottom left side of the air cushion chamber 3, for example, Figure 1 As shown, the present invention further includes that the left bottom flushing pipeline 10 is externally bolted to a left bottom flushing ball valve 101 , and the right bottom flushing pipeline 9 is externally bolted to a right bottom flushing ball valve 91 .

[0046] When in use, the left bottom flushing ball valve 101 on the left bottom flushing pipeline 10 can control the mud in the slurry inlet pipeline 6 to enter the left bottom of the air cushion chamber 3;

[0047] The right bottom flushing ball valve 91 on the right bottom flushing pipeline 9 can control the mud in the slurry inlet pipeline 6 to enter the left bottom of the air cushion chamber 3.

[0048] When the present invention is in use, when the requirements for ground settlement are high, the air cushion direct discharge mode can be used for excavation. The mud and water tank 2 contains a full tank of mud, the top of the air cushion tank 3 is pressurized air, and the bottom is mud. Open the slurry inlet ball valve 61 to allow the mud outside the tunnel to enter the mud and water tank 2 through the slurry inlet pipeline 6, open the slurry discharge ball valve 111 to allow the slurry in the mud and water tank 2 to be discharged through the slurry discharge pipeline 11, open the right air pressure connecting pipe gate valve and the left air pressure connecting pipe gate valve, so that the mud pressure at the top of the mud and water tank 2 and the mud pressure at the bottom of the air cushion tank 3 are kept consistent through the right air pressure connecting pipe and the left air pressure connecting pipe. When the mud pressure in the mud and water tank 2 increases or decreases, the right air pressure connecting pipe 7 and the left air pressure connecting pipe 8 can transmit the mud pressure to the bottom of the air cushion tank 3, and the mud pressure at the bottom of the air cushion tank 3 also changes accordingly. The mud pressure at the bottom of the air cushion tank 3 is consistent with the upper air pressure. The air pressure at the upper part of the air cushion tank 3 can be controlled by the pressure maintaining system 12. When the air pressure When the air pressure at the top of the cushion bin 3 increases, the automatic exhaust ball valve 51 opens to reduce the air pressure at the top of the air cushion bin 3; when the air pressure at the top of the air cushion bin 3 decreases, the automatic air inlet ball valve 41 opens to increase the air pressure at the top of the air cushion bin 3. When the air pressure at the top of the air cushion bin 3 is adjusted, the mud pressure at the bottom also changes accordingly, thereby achieving the purpose of controlling the mud pressure in the mud and water bin 2. When slurry is deposited at the bottom of the air cushion bin 3, the left bottom flushing ball valve 101 and the right bottom flushing ball valve 91 are opened to allow the mud in the slurry inlet pipeline 6 to enter the air cushion bin 3, surging the slurry at the bottom of the air cushion bin 3, and preventing the left air pressure connecting pipe and the right air pressure connecting pipe from being blocked by slurry, thereby causing the mud pressure in the air cushion bin 3 and the mud and water bin 2 to be inconsistent.

[0049] When the requirements for stratum settlement are low, direct discharge mode can be used for excavation to improve excavation efficiency. The right air pressure connecting pipe gate valve 71 and the left air pressure connecting pipe gate valve 81 on the top of the air cushion chamber 3 are closed to close the mud and water chamber 2, the automatic inlet ball valve 41 and the automatic exhaust ball valve 51 are closed, the right bottom flushing ball valve 91 and the left bottom flushing ball valve 101 are closed, and the cutter head 1 rotates to make the stones or soil in the front stratum fall into the mud to form slurry. The mud and water chamber 2 contains a full warehouse of mud. Open the slurry inlet ball valve 61 to allow the mud outside the tunnel to enter the mud and water chamber 2 through the slurry inlet pipeline 6, and open the slurry discharge ball valve 111 to allow the slurry in the mud and water chamber 2 to be discharged through the slurry discharge pipeline 11.

[0050] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An air cushion type direct discharge mud water shield, characterized in that: The invention comprises a cutter head (1), a mud and water tank (2) and an air cushion tank (3), wherein one side of the cutter head (1) is bolted to the mud and water tank (2), the outside of the mud and water tank (2) is bolted to a front partition (13) for separating the mud and water tank (2) from the air cushion tank (3), a slurry discharge pipeline (11) for discharging slurry from the mud and water tank (2) to the outside of the tunnel is plugged into the bottom of the mud and water tank (2), a rear partition (14) is bolted to one side of the front partition (13) away from the air cushion tank (3), a slurry inlet pipeline (6) for transporting slurry outside the tunnel to the mud and water tank (2) is plugged into one side of the mud and water tank (2), and the slurry inlet pipeline (6) passes through the front partition (13) and the rear partition (14), a right air pressure connecting pipe (7) and a left air pressure connecting pipe (8) are plugged into the upper part of the mud and water tank (2), and the right air pressure connecting pipe (7) is away from the rear partition (14). One end of the mud and water bin (2) extends to the lower right side of the air cushion bin (3), and the end of the left air pressure connecting pipe (8) away from the mud and water bin (2) extends to the lower left side of the air cushion bin (3). The air cushion bin (3) is externally connected with a right bottom flushing pipeline (9) and a left bottom flushing pipeline (10), and the right bottom flushing pipeline (9) and the left bottom flushing pipeline (10) are both connected to the slurry inlet pipeline (6). The air cushion bin (3) is externally connected with an air intake pipeline (4) and an exhaust pipeline (5), and the air intake pipeline (4) is located on the upper side of the exhaust pipeline (5). The air intake pipeline (4) and the exhaust pipeline (5) both extend through the upper part of the rear partition (14), and the ends of the air intake pipeline (4) and the exhaust pipeline (5) away from the air cushion bin (3) are both provided with a pressure maintaining system (12) for controlling the air pressure above the air cushion bin (3).

2. The air cushion type direct discharge mud water shield according to claim 1, characterized in that: The cross section of the air cushion bin (3) is a fan-shaped structure. The inlet of the pulp inlet pipeline (6) is located at the upper part of the rear partition (14). The inlets of the right air pressure connecting pipe (7) and the left air pressure connecting pipe (8) are located at the upper part of the front partition (13). The inlets of the air inlet pipeline (4) and the exhaust pipeline (5) are at the top of the rear partition (14). The inlet of the pulp discharge pipeline (11) is located at the bottom of the front partition (13). The inlets of the right bottom flushing pipeline (9) and the left bottom flushing pipeline (10) are located at the bottom of the rear partition (14).

3. The air cushion type direct discharge mud water shield according to claim 1, characterized in that: The exhaust pipe (5) is externally bolted to an automatic exhaust ball valve (51) for reducing the air pressure in the air cushion chamber (3), and one side of the intake pipe (4) is bolted to an automatic intake ball valve (41) for increasing the air pressure in the air cushion chamber (3).

4. The air cushion type direct discharge mud water shield according to claim 1, characterized in that: One side of the slurry inlet pipeline (6) is bolted with a slurry inlet ball valve (61) for allowing slurry to enter the slurry water bin (2).

5. The air cushion type direct discharge mud water shield according to claim 1, characterized in that: A slurry discharge ball valve (111) is provided on one side of the slurry discharge pipeline (11) for discharging slurry.

6. The air cushion type direct discharge mud water shield according to claim 1, characterized in that: The right air pressure connecting pipe (7) is externally bolted to a right air pressure connecting pipe gate valve (71), and one side of the left air pressure connecting pipe (8) is bolted to a left air pressure connecting pipe gate valve (81).

7. The air cushion type direct discharge mud water shield according to claim 1, characterized in that: The left bottom flushing pipeline (10) is externally bolted to a left bottom flushing ball valve (101), and the right bottom flushing pipeline (9) is externally bolted to a right bottom flushing ball valve (91).

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