Large-diameter shield mud film pressure building grouting device

Abstract

The present application relates to the field of shield machine equipment, especially to a large-diameter shield mud membrane pressure building grouting device. The present application can effectively avoid that bentonite blocks the pipeline, and can fully pump out the bentonite after grouting is completed, effectively avoid that different bentonites are mixed together to affect the formation of mud membrane, thereby improving the success rate of mud membrane. The present application comprises a shell, a tunneling module and a jack, etc.; the tunneling module is fixedly connected to the shell, and the jack is fixedly connected to the tunneling module. The present application makes low-viscosity bentonite, medium-viscosity bentonite and high-viscosity bentonite alternately injected, and the used conveying pipe is cleaned, so as to avoid that the bentonite stays in the conveying pipe for too long and causes the conveying pipe to be blocked, and at the same time, avoid that different bentonites are mixed together to affect the formation of mud membrane, thereby improving the overall grouting efficiency.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine equipment, and in particular to a large-diameter tunnel boring machine mud film pressure injection device. Background Technology

[0002] The shield tunneling method is a fully mechanized construction method within the cut-and-cover tunneling technique. It involves advancing a tunnel boring machine (TBM) underground, using the shield shell and tunnel segments to support the surrounding rock and prevent collapse into the tunnel. Simultaneously, cutting devices excavate the soil in front of the excavation face, transporting the excavated material out of the tunnel using haulage machinery. Jacks then apply pressure from the rear to propel the TBM forward, assembling precast concrete segments to form the tunnel structure. The TBM serves both as a construction machine and a powerful temporary support structure. During tunnel excavation, the TBM uses cutting tools to cut soil and break up rock. After long-distance excavation, the cutting tools need to be replaced.

[0003] If the stratum at the cutterhead replacement location of the tunnel boring machine (TBM) is not dense, has large voids, leaks air, and is not pressurized, then cutterhead replacement is not feasible. In this case, mud film injection is required inside the soil chamber. Low-viscosity, medium-viscosity, and high-viscosity bentonite should be injected sequentially to replace and fill the stratum pores, allowing the bentonite in the stratum voids to diffuse to more distant strata, thereby forming a mud film inside the soil chamber and maintaining stable chamber pressure, increasing the self-stability of the soil, before the cutterhead can be replaced. Currently, when injecting different types of bentonite into the soil chamber, bentonite easily remains in the delivery pipes, mixing with other bentonite, which affects the diffusion of bentonite and reduces the success rate of mud film replacement. Moreover, bentonite easily clogs the delivery pipes, and manual unblocking is inconvenient. When pumping bentonite out of the pipes, negative pressure is generated, affecting pumping efficiency and thus reducing construction efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned technical problems by providing a large-diameter shield tunneling mud film pressure injection device, which can effectively prevent bentonite from clogging the pipeline and ensure that the bentonite can be fully pumped out after grouting. This effectively prevents different types of bentonite from mixing together and affecting the formation of the mud film, thereby improving the success rate of mud film formation.

[0005] The technical solution of this invention is as follows: A large-diameter shield tunneling mud film pressure grouting device, comprising a shell, a tunneling module, jacks, a screw conveyor, a jetting pipe, a solenoid valve, a connecting rod, a heavy-duty push rod, a switching mechanism, and a sealing mechanism. The tunneling module is fixedly connected to the shell and is equipped with cutting tools. The jacks are fixedly connected to the tunneling module and are located inside the shell, and are fixedly connected to both the shell and the tunneling module. The screw conveyor is fixedly connected to the jacks, and one end of the screw conveyor is fixedly connected to the tunneling module. Next, two injection pipes are fixedly connected to the jack. Both injection pipes are fixedly connected to the outer shell and to the tunneling module. The two injection pipes are staggered. Each injection pipe has twelve grouting pipes. Solenoid valves are fixedly connected to each injection pipe. Two connecting rods are fixedly connected to the side of the tunneling module near the jack. The two connecting rods are symmetrically arranged. Heavy-duty push rods are fixedly connected to each connecting rod. Switching mechanisms are provided on both solenoid valves. Sealing mechanisms are provided on both switching mechanisms.

[0006] As a preferred embodiment of the present invention, the switching mechanism includes a connecting pipe, a guide frame, a baffle, and a conveying pipe. The two solenoid valves are fixedly connected to the connecting pipes, and the telescopic rods of the two heavy-duty push rods are fixedly connected to the guide frame. Each connecting pipe is slidably connected to two baffles, and the two baffles located on the same connecting pipe form a group. Each baffle is slidably connected to the guide frame. The two connecting pipes are fixedly connected to the conveying pipes, and each conveying pipe is connected to the connecting pipe.

[0007] As a preferred embodiment of the present invention, each of the conveying pipes is provided with a vent hole.

[0008] As a preferred embodiment of the present invention, the sealing mechanism includes a movable frame, a retaining ring, a guide rod, a movable lever, and a compression spring. A movable frame is slidably connected to each of the baffles, and two movable frames form a group. A retaining ring is fixedly connected to the vent hole of each of the conveying pipes. A guide rod is fixedly connected to the side of each conveying pipe near the retaining ring. The movable frame is slidably connected to the guide rod. A movable lever is slidably connected to each of the retaining rings. The movable lever passes through the vent hole of the conveying pipe and contacts the conveying pipe. A compression spring is connected between the movable frame and the movable lever.

[0009] As a preferred embodiment of the present invention, it further includes a stirring mechanism. Each of the sealing mechanisms is provided with a stirring mechanism, which includes a stirring rod, a moving rod, a limiting rod, a stop rod, and a connecting spring. Each moving rod is rotatably connected to a stirring rod, and one end of the stirring rod is located inside the conveying pipe. Each moving frame is fixedly connected to a moving rod, and the moving rod and the stirring rod are connected by a thread. Each retaining ring is fixedly connected to a limiting rod, and each limiting rod is slidably connected to a stop rod. The stop rod contacts the moving frame, and two of the stop rods contact two of the moving rods. A connecting spring connects the limiting rod and the stop rod.

[0010] As a preferred embodiment of the present invention, it further includes a pressurizing mechanism. Each of the sealing mechanisms is provided with a pressurizing mechanism, which includes a push plate, a sealing rod, a pressurizing chamber, and a piston cylinder. A push plate is fixedly connected to each of the moving rods. A sealing rod is slidably connected to the side of each delivery pipe near the solenoid valve. The sealing rod is fixedly connected to the moving rod. Each of the sealing rods has a through hole. A pressurizing chamber is fixedly connected to each of the retaining rings. A piston cylinder is fixedly connected to each delivery pipe. The piston cylinder is fixedly connected to the retaining ring and communicates with the pressurizing chamber. The push plate is slidably connected to the piston cylinder. The sealing rod is in contact with the piston cylinder.

[0011] As a preferred embodiment of the present invention, it further includes a slide and a torsion spring. Each of the moving rods is slidably connected to a slide, the slide is in contact with the stirring rod, and a torsion spring is connected between the slide and the stirring rod.

[0012] As a preferred embodiment of the present invention, it further includes a support rod, and each of the movable frames is fixedly connected to a support rod.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, low-viscosity bentonite is first injected into two of the delivery pipes to fill the loose voids in the stratum. After the injection is completed, medium-viscosity bentonite is injected into the other two delivery pipes to replace the low-viscosity bentonite. The residual soil in the two delivery pipes is then quickly cleaned. After the injection is completed, high-viscosity bentonite is injected into the two cleaned delivery pipes to replace the medium-viscosity bentonite. At the same time, the residual soil in the other two delivery pipes is quickly cleaned. Thus, low-viscosity bentonite, medium-viscosity bentonite, and high-viscosity bentonite are injected alternately, and the used delivery pipes are cleaned to prevent bentonite from remaining in the delivery pipes for too long, which could cause the delivery pipes to become blocked. At the same time, different types of bentonite are prevented from mixing together, which could affect the formation of the mud film, thereby improving the overall grouting efficiency.

[0014] 2. In this invention, after injecting low-viscosity bentonite, medium-viscosity bentonite, and high-viscosity bentonite in sequence, the moving frame moves towards the side closer to the guide frame, which in turn moves the moving rod. The moving rod then rotates the stirring rod, which agitates the low-viscosity, medium-viscosity, or high-viscosity bentonite remaining in the delivery pipe. This prevents the low-viscosity, medium-viscosity, or high-viscosity bentonite from clogging the delivery pipe, ensuring that the low-viscosity, medium-viscosity, or high-viscosity bentonite can be fully extracted after each grouting. This effectively prevents different types of bentonite from mixing together and affecting the formation of the mud film, thereby improving the success rate of the mud film and increasing construction efficiency.

[0015] 3. In this invention, when low-viscosity bentonite, medium-viscosity bentonite, and high-viscosity bentonite are injected sequentially, the moving rod moves away from the guide frame, causing the sealing rod to move. This creates negative pressure in the piston cylinder and pressurization chamber, allowing the moving rod to more stably block the vent hole of the delivery pipe. After the low-viscosity, medium-viscosity, and high-viscosity bentonite are injected sequentially, the moving rod moves closer to the guide frame, causing the sealing rod to move. The moving sealing rod compresses the air in the piston cylinder, thus pressurizing the vent hole of the delivery pipe. When the moving rod moves and drives the push plate to move, the air in the pressurization chamber quickly clears the vent hole, continuously clearing the vent hole of the delivery pipe while simultaneously pressurizing the blocked vent hole, making it more stably blocked and more effectively maintaining the chamber pressure. This improves the replacement quality of the low-viscosity, medium-viscosity, or high-viscosity bentonite in the delivery pipe, thereby improving the overall grouting effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the first partial three-dimensional structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the partially disassembled three-dimensional structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the second partial three-dimensional structure of the present invention.

[0020] Figure 5 For the present invention Figure 4 A magnified three-dimensional structural diagram of A in the middle.

[0021] Figure 6 This is a schematic diagram of a first partial three-dimensional structure of the sealing mechanism, stirring mechanism and pressurizing mechanism of the present invention.

[0022] Figure 7 This is a partial cross-sectional three-dimensional structural diagram of the switching mechanism, sealing mechanism and stirring mechanism of the present invention.

[0023] Figure 8 This is a second partial three-dimensional structural diagram of the sealing mechanism, stirring mechanism and pressurizing mechanism of the present invention.

[0024] Figure 9 This is a partial cross-sectional perspective view of the sealing mechanism, agitation mechanism, and pressurization mechanism of the present invention. The labels in the drawing are: 1-outer shell, 2-tunneling module, 3-jack, 4-screw conveyor, 51-jet pipe, 52-solenoid valve, 53-connecting rod, 54-heavy-duty push rod, 61-connecting pipe, 63-guide frame, 64-baffle, 65-conveying pipe, 71-moving frame, 72-retaining ring, 73-guide rod, 74-moving lever, 75-compression spring, 81-agitating rod, 82-moving lever, 83-limiting rod, 84-stop rod, 85-connecting spring, 91-push plate, 92-sealing rod, 93-pressurization chamber, 94-piston cylinder, 101-slide, 102-torsion spring, 11-support rod. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1: A large-diameter shield tunneling mud film pressure injection device, such as Figures 1-7As shown, the system includes a housing 1, a tunneling module 2, a jack 3, a screw conveyor 4, a jetting pipe 51, a solenoid valve 52, a connecting rod 53, a heavy-duty push rod 54, a switching mechanism, and a sealing mechanism. The tunneling module 2 is fixedly connected to the housing 1 and is equipped with cutting tools. The jack 3 is bolted to the tunneling module 2 and is located inside the housing 1, and is fixedly connected to both the housing 1 and the tunneling module 2. The screw conveyor 4 is bolted to the jack 3, and one end of the screw conveyor 4 is fixedly connected to the tunneling module 2. A screw is bolted to the jack 3. Two injection pipes 51 are bolted together, both of which are fixedly connected to the outer casing 1 and the tunneling module 2. The two injection pipes 51 are staggered and each of them has twelve grouting pipes. Solenoid valves 52 are bolted to each of the two injection pipes 51. Two connecting rods 53 are fixedly connected to the side of the tunneling module 2 near the jack 3. The two connecting rods 53 are symmetrically arranged and each of them has a heavy-duty push rod 54 fixedly connected to it. Both of the solenoid valves 52 have a switching mechanism and a sealing mechanism.

[0027] The switching mechanism includes a connecting pipe 61, a guide frame 63, a baffle 64, and a conveying pipe 65. The connecting pipe 61 is fixedly connected to both solenoid valves 52. The guide frame 63 is bolted to the telescopic rods of both heavy-duty push rods 54. Two baffles 64 are slidably connected to each connecting pipe 61. Two baffles 64 located on the same connecting pipe 61 form a group. Each baffle 64 is slidably connected to the guide frame 63. The conveying pipe 65 is fixedly connected to both connecting pipes 61, and each conveying pipe 65 is connected to the connecting pipe 61.

[0028] Each of the conveying pipes 65 is provided with a vent hole.

[0029] The sealing mechanism includes a movable frame 71, a retaining ring 72, a guide rod 73, a movable lever 74, and a compression spring 75. Each of the baffles 64 is slidably connected to a movable frame 71, and two movable frames 71 form a group. Each of the conveying pipes 65 is fixedly connected to a vent hole with a retaining ring 72. Each of the conveying pipes 65 is fixedly connected to a guide rod 73 on the side near the retaining ring 72. The movable frame 71 is slidably connected to the guide rod 73. Each retaining ring 72 is slidably connected to a movable lever 74. The movable lever 74 passes through the vent hole of the conveying pipe 65 and contacts the conveying pipe 65. A compression spring 75 is connected between the movable frame 71 and the movable lever 74.

[0030] Initially, four movable levers 74 blocked the vent holes on the four conveying pipes 65, two compression springs 75 were in a compressed state, and two baffles 64 blocked one side of the two connecting pipes 61. In actual application, the workers started the tunneling module 2, jacks 3, and screw conveyors 4 to excavate the tunnel. When the tunneling module 2 needed to change the cutting tools during tunnel excavation, but the strata inside the tunnel were loose, the workers first shut down the tunneling module 2, allowing jacks 3 and screw conveyors 4 to continue conveying the original soil inside the tunnel to transport it out. Then, they opened two solenoid valves 52 to inject low-viscosity bentonite into two of the unblocked conveying pipes 65, maintaining a balance between the injection of low-viscosity bentonite and the discharge of the original soil. Initially, the low-viscosity bentonite... Low-viscosity bentonite is introduced into the injection pipe 51 through two connecting pipes 61 and solenoid valve 52. Then, the twelve injection pipes of the injection pipe 51 evenly inject the low-viscosity bentonite into the inner wall of the tunnel, allowing it to diffuse and fill the loose voids in the stratum. The injection continues for 2 hours. Because the moving lever 74 blocks the delivery pipe 65, the delivery pipe 65 will not depressurize during the injection of low-viscosity bentonite, thus maintaining pressure in the chamber. After the low-viscosity bentonite has filled the voids in the stratum, the workers stop injecting the low-viscosity bentonite and activate two heavy-duty push rods 54. The retraction of the telescopic rods of the heavy-duty push rods 54 will move the guide frame 63 towards the side closer to the connecting rod 53. The movement of the guide frame 63 will push the... One baffle 64 moves towards the side closer to the solenoid valve 52, pushing another baffle 64 away from the solenoid valve 52, closing one side of the connecting pipe 61 and opening the other side, thereby closing two of the conveying pipes 65 for conveying low-viscosity bentonite and opening the other two conveying pipes 65. As one baffle 64 moves, it pushes one of the moving frames 71 towards the side closer to the guide frame 63. The movement of one moving frame 71 will no longer compress one of the compression springs 75, causing the compression spring 75 to reset and move one of the moving levers 74. The movement of one moving lever 74 will no longer block the vent hole on one of the conveying pipes 65, thereby opening the vent holes on two of the conveying pipes 65. The other baffle... As 64 moves, it pushes another moving frame 71 to move away from the guide frame 63. The movement of the other moving frame 71 compresses another compression spring 75, causing it to be compressed. Simultaneously, under the elastic force of the compression spring 75, the other moving lever 74 firmly blocks the vent hole on one of the delivery pipes 65, thereby stably sealing the vent holes on the other two delivery pipes 65. Then, the operator closes the two heavy-duty push rods 54 and injects medium-viscosity bentonite into the other two delivery pipes 65 to replace the low-viscosity bentonite. At the same time, the remaining low-viscosity bentonite in the two delivery pipes 65 is extracted. Since the vent holes of the two delivery pipes 65 are now open, the pressure in the two delivery pipes 65 can be balanced.This allows for faster extraction of low-viscosity bentonite from two of the delivery pipes 65, facilitating cleaning of the pipes. Simultaneously, because the vent holes of the other two delivery pipes 65 are sealed, pressure is not released during the injection of medium-viscosity bentonite, thus maintaining chamber pressure. After the medium-viscosity bentonite replacement is completed, the chamber pressure is increased by 20 kPa, and continuous injection is performed for 2 hours. This allows the low-viscosity bentonite in the formation pores to diffuse to more distant formations, adhering to the outer soil of the mud film and expanding the mud film sealing range. After the medium-viscosity bentonite has filled the formation pores, the two heavy-duty push rods 54 are activated again. The extension of the telescopic rods of the heavy-duty push rods 54 causes the guide frame 63 to move away from the connecting rod 53. The movement of baffle 64 will push one of the baffles 64 away from the solenoid valve 52 and push the other baffle 64 closer to the solenoid valve 52, thereby opening one side of the connecting pipe 61 and closing the other side, thus closing the other two conveying pipes 65 that are conveying bentonite and opening the two cleaned conveying pipes 65. While one baffle 64 is moving, it will first push one of the moving frames 71 away from the guide frame 63, causing one of the moving frames 71 to block the vent hole of one of the conveying pipes 65. As one baffle 64 continues to move, it will compress one of the compression springs 75, causing the compression spring 75 to be compressed. Simultaneously, under the elastic force of the compression spring 75, one of the moving levers 74 will firmly... The vent holes on the conveying pipe 65 are blocked, thus blocking the vent holes on two of the conveying pipes 65. As the other baffle 64 moves, it pushes another moving frame 71 to move closer to the guide frame 63. The movement of the other moving frame 71 first resets the compression spring 75, and then the compression spring 75 drives the other moving frame 71 to move. The movement of the other moving frame 71 will no longer block the vent hole on the other conveying pipe 65, thus opening the vent holes on the other two conveying pipes 65. Then, the operator closes the two heavy-duty push rods 54 again and injects high-viscosity bentonite into two of the conveying pipes 65 to replace the medium-viscosity bentonite. Simultaneously, the remaining medium-viscosity bentonite in the other two conveying pipes 65 is extracted. Because the other two conveying pipes 65... All the vent holes were opened, allowing for pressure balance and faster extraction of the medium-viscosity bentonite from the other two delivery pipes 65. Simultaneously, because the vent holes in two of the delivery pipes 65 were blocked, pressure was not released during the injection of high-viscosity bentonite, thus maintaining chamber pressure during the injection process. After the high-viscosity bentonite replacement was completed, the pressure was increased by 20 kPa, and injection continued for 2 hours, allowing the medium-viscosity bentonite in the formation voids to diffuse to more distant formations and adhere to the outer ring of the mud film. After the high-viscosity bentonite injection was completed, the workers activated two heavy-duty pushers 54 to open the vent holes on two of the delivery pipes 65 used for high-viscosity bentonite injection, and cleaned any remaining high-viscosity bentonite from the two delivery pipes 65.To prevent bentonite residue from clogging the delivery pipe 65 and affecting subsequent work, low-viscosity, medium-viscosity, and high-viscosity bentonite are injected alternately. Used delivery pipes 65 are cleaned to prevent prolonged bentonite retention and blockage, and to avoid mixing different types of bentonite, which could hinder mud film formation, thereby improving overall grouting efficiency.

[0031] Example 2: Based on Example 1, such as Figures 1-9 As shown, it also includes an agitation mechanism. Each of the sealing mechanisms is equipped with an agitation mechanism, which includes an agitation rod 81, a moving rod 82, a limiting rod 83, a stop rod 84, and a connecting spring 85. Each moving rod 74 is rotatably connected to an agitation rod 81, and one end of the agitation rod 81 is located inside the conveying pipe 65. Each moving frame 71 is bolted to a moving rod 82, and the moving rod 82 is threaded to the agitation rod 81. Each retaining ring 72 is fixedly connected to a limiting rod 83, and each limiting rod 83 is slidably connected to a stop rod 84. The stop rod 84 contacts the moving frame 71, and two of the stop rods 84 contact two of the moving rods 74. A connecting spring 85 connects the limiting rod 83 and the stop rod 84.

[0032] As one of the movable frames 71 moves closer to the guide frame 63, it also moves one of the movable rods 82. Since one of the stop rods 84 blocks one of the movable rods 74, the movable rod 74 will not move, and the compression spring 75 is stretched. The movement of one of the movable rods 82 will cause one of the agitating rods 81 to rotate, thereby causing two of the agitating rods 81 to rotate and agitate the low-viscosity, medium-viscosity, or high-viscosity bentonite remaining in the two conveying pipes 65. This prevents the low-viscosity, medium-viscosity, or high-viscosity bentonite from clogging the conveying pipes 65, thus allowing the low-viscosity bentonite to... High-viscosity, medium-viscosity, or high-viscosity bentonite can be fully extracted. One of the moving frames 71 continues to move and contacts one of the stop levers 84, pushing the stop lever 84 away from the moving lever 74. One of the connecting springs 85 is stretched, and the moving stop lever 84 no longer blocks one of the moving levers 74. At this point, the compression spring 75 resets, causing one of the moving levers 74 to move and no longer blocking the vent hole of one of the delivery pipes 65. This opens the vent holes of two of the delivery pipes 65, allowing the low-viscosity bentonite inside to be extracted. When bentonite, medium-viscosity bentonite, or high-viscosity bentonite is extracted, another moving frame 71 moves away from the guide frame 63, which in turn moves another moving rod 82. The movement of the other moving rod 82 causes another stirring rod 81 to rotate, and simultaneously, the other moving rod 82 disengages from the other limiting rod 83. When one moving frame 71 moves away from the guide frame 63, it moves one of the moving rods 82, which in turn causes one of the stirring rods 81 to rotate. The other moving frame 71 moves closer to the guide frame 63. This will cause another moving rod 82 to move. Since another stop rod 84 blocks another moving rod 74 at this time, the other moving rod 74 will not move. The compression spring 75 is stretched. The movement of the other moving rod 82 will cause another stirring rod 81 to rotate. The rotation of the other stirring rod 81 will agitate the bentonite remaining in the other conveying pipe 65. This process is repeated to continuously agitate the bentonite remaining in the conveying pipe 65, so that the bentonite remaining in the conveying pipe 65 can be fully discharged, effectively preventing different bentonites from mixing together and affecting the formation of the mud film, thereby improving the success rate of mud film formation.

[0033] Example 3: Based on Example 2, such as Figures 4-9As shown, it also includes a pressurizing mechanism. Each of the sealing mechanisms is equipped with a pressurizing mechanism, which includes a push plate 91, a sealing rod 92, a pressurizing chamber 93, and a piston cylinder 94. Each of the moving rods 82 is bolted to a push plate 91. Each of the conveying pipes 65 is slidably connected to a sealing rod 92 on the side near the solenoid valve 52. The sealing rod 92 is fixedly connected to the moving rod 74. Each of the sealing rods 92 has a through hole. Each of the retaining rings 72 is fixedly connected to a pressurizing chamber 93. Each of the conveying pipes 65 is fixedly connected to a piston cylinder 94. The piston cylinder 94 is fixedly connected to the retaining ring 72 and communicates with the pressurizing chamber 93. The push plate 91 is slidably connected to the piston cylinder 94, and the sealing rod 92 is in contact with the piston cylinder 94.

[0034] Initially, the push plate 91 blocked the piston cylinder 94. During the injection of low-viscosity, medium-viscosity, or high-viscosity bentonite, it easily overflowed into the vent hole of the delivery pipe 65, blocking the vent hole and preventing air from entering or leaving. As the moving rod 82 moves closer to the guide frame 63, it also moves the sealing rod 92. The movement of the sealing rod 92 compresses the air in the piston cylinder 94, allowing it to flow into the pressurization chamber 93, thus pressurizing the vent hole of the delivery pipe 65. Simultaneously, the movement of the moving lever 74 moves the push plate 91, and the movement of the moving lever 74 removes the blockage of the vent hole of the delivery pipe 65, allowing the air in the pressurization chamber 93 to quickly clear the vent hole. As the push plate 91 continues to move, it will no longer block the piston cylinder 94, and the pressure inside the piston cylinder 94 will be restored. As the moving rod 82 moves away from the guide frame 63, it will drive the sealing rod 92 to move. The movement of the sealing rod 92 will draw air out of the piston cylinder 94, creating a negative pressure in the piston cylinder 94 and the pressurization chamber 93. This will allow the moving rod 74 to more stably block the vent hole of the delivery pipe 65. This process is repeated to continuously clear the vent hole of the delivery pipe 65 and pressurize the blocked vent hole, making it more stably block the vent hole of the delivery pipe 65 and more effectively maintain the chamber pressure. This will improve the replacement quality of low-viscosity bentonite, medium-viscosity bentonite, or high-viscosity bentonite in the delivery pipe 65 and improve the overall grouting effect.

[0035] Example 4: Based on Example 3, such as Figures 4-9 As shown, it also includes a slide 101 and a torsion spring 102. Each of the moving rods 82 is slidably connected to the slide 101. The slide 101 is in contact with the stirring rod 81, and a torsion spring 102 is connected between the slide 101 and the stirring rod 81.

[0036] When the stirring rod 81 rotates, the torsion spring 102 will be twisted. When the stirring rod 81 moves to the side closer to the guide frame 63, it will drive the slide 101 to move. When the stirring rod 81 rotates in the reverse direction, it will no longer twist the torsion spring 102. At the same time, under the torsion of the torsion spring 102, the stirring rod 81 can quickly rotate in the reverse direction, so that the moving rod 82 can be better reset and prevent the moving rod 82 from getting stuck when the stirring rod 81 reverses.

[0037] Example 5: Based on Example 4, such as Figures 4-8 As shown, it also includes a support rod 11, and each of the movable frames 71 is fixedly connected to a support rod 11.

[0038] If the movable lever 74 gets stuck when it moves away from the guide frame 63, it will move away from the guide frame 63 and move with the support rod 11, pushing the support rod 11 to move, which in turn pushes the movable lever 74 to move away from the guide frame 63 and blocks the vent hole of the delivery pipe 65, thereby effectively preventing accidents from happening during the injection of low-viscosity bentonite, medium-viscosity bentonite or high-viscosity bentonite.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-diameter shield tunneling mud film pressure grouting device, characterized in that: The system includes a housing (1), a tunneling module (2), a jack (3), a screw conveyor (4), a jet pipe (51), a solenoid valve (52), a connecting rod (53), a heavy-duty push rod (54), a switching mechanism, and a sealing mechanism. The tunneling module (2) is fixedly connected to the housing (1). The tunneling module (2) is equipped with cutting tools. The jack (3) is fixedly connected to the tunneling module (2). The jack (3) is located inside the housing (1) and is fixedly connected to the housing (1). The jack (3) is fixedly connected to the tunneling module (2). The screw conveyor (4) is fixedly connected to the jack (3). One end of the screw conveyor (4) is fixedly connected to the tunneling module (2). 3) Two injection pipes (51) are fixedly connected to the upper part. Both injection pipes (51) are fixedly connected to the outer shell (1). Both injection pipes (51) are fixedly connected to the tunneling module (2). The two injection pipes (51) are staggered. Each injection pipe (51) is provided with twelve grouting pipes. Both injection pipes (51) are fixedly connected with solenoid valves (52). The tunneling module (2) is fixedly connected with two connecting rods (53) on the side near the jack (3). The two connecting rods (53) are symmetrically arranged. Both connecting rods (53) are fixedly connected with heavy push rods (54). Both solenoid valves (52) are provided with switching mechanisms. Both switching mechanisms are provided with sealing mechanisms. The switching mechanism includes a connecting pipe (61), a guide frame (63), a baffle (64), and a delivery pipe (65). The two solenoid valves (52) are fixedly connected to the connecting pipe (61). The telescopic rods of the two heavy push rods (54) are fixedly connected to the guide frame (63). Each connecting pipe (61) is slidably connected to two baffles (64). The two baffles (64) located on the same connecting pipe (61) form a group. Each baffle (64) is slidably connected to the guide frame (63). The two connecting pipes (61) are fixedly connected to the delivery pipe (65), and each delivery pipe (65) is connected to the connecting pipe (61). The sealing mechanism includes a movable frame (71), a retaining ring (72), a guide rod (73), a movable lever (74), and a compression spring (75). Each of the baffles (64) is slidably connected to a movable frame (71), and two movable frames (71) form a group. Each of the conveying pipes (65) has a retaining ring (72) fixedly connected to its vent hole. Each of the conveying pipes (65) has a guide rod (73) fixedly connected to the side of the retaining ring (72). The movable frame (71) is slidably connected to the guide rod (73). Each retaining ring (72) has a movable lever (74) slidably connected to it. The movable lever (74) passes through the vent hole of the conveying pipe (65) and contacts the conveying pipe (65). A compression spring (75) is connected between the movable frame (71) and the movable lever (74).

2. The large-diameter shield tunneling mud film pressure injection device as described in claim 1, characterized in that: Each of the conveying pipes (65) is provided with a vent hole.

3. The large-diameter shield tunneling mud film pressure injection device as described in claim 1, characterized in that: It also includes an agitation mechanism. Each of the sealing mechanisms is provided with an agitation mechanism. The agitation mechanism includes an agitation rod (81), a moving rod (82), a limiting rod (83), a stop rod (84), and a connecting spring (85). Each moving rod (74) is rotatably connected to an agitation rod (81), and one end of the agitation rod (81) is located inside the conveying pipe (65). Each moving frame (71) is fixedly connected to a moving rod (82). The moving rod (82) and the agitation rod (81) are connected by a thread. Each retaining ring (72) is fixedly connected to a limiting rod (83). Each limiting rod (83) is slidably connected to a stop rod (84). The stop rod (84) contacts the moving frame (71). Two of the stop rods (84) contact two of the moving rods (74). A connecting spring (85) connects the limiting rod (83) and the stop rod (84).

4. The large-diameter shield tunneling mud film pressure injection device as described in claim 3, characterized in that: It also includes a pressurizing mechanism. Each of the sealing mechanisms is equipped with a pressurizing mechanism. The pressurizing mechanism includes a push plate (91), a sealing rod (92), a pressurizing chamber (93), and a piston cylinder (94). Each of the moving rods (82) is fixedly connected to a push plate (91). Each of the conveying pipes (65) is slidably connected to a sealing rod (92) on the side near the solenoid valve (52). The sealing rod (92) is fixedly connected to the moving rod (74). Each of the sealing rods (92) has a through hole. Each of the retaining rings (72) is fixedly connected to a pressurizing chamber (93). Each of the conveying pipes (65) is fixedly connected to a piston cylinder (94). The piston cylinder (94) is fixedly connected to the retaining ring (72) and communicates with the pressurizing chamber (93). The push plate (91) is slidably connected to the piston cylinder (94). The sealing rod (92) is in contact with the piston cylinder (94).

5. The large-diameter shield tunneling mud film pressure injection device as described in claim 4, characterized in that: It also includes a slide (101) and a torsion spring (102), with a slide (101) slidably connected to each of the moving rods (82), the slide (101) contacting the stirring rod (81), and a torsion spring (102) connecting the slide (101) and the stirring rod (81).

6. The large-diameter shield tunneling mud film pressure injection device as described in claim 5, characterized in that: It also includes a support rod (11), and each of the movable frames (71) is fixedly connected to a support rod (11).

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