A protective device for an automatic pressure-maintaining system of a tunnel boring machine

Abstract

This utility model relates to the field of tunnel boring machine (TBM) technology, specifically a protective device for an automatic pressure-maintaining system of a TBM. It includes a TBM soil chamber plate, a connecting pipe, a valve, and operating wheels. A valve is fitted to the end of the connecting pipe furthest from the TBM soil chamber plate, located on one side of the soil chamber plate. The lower part of the soil chamber plate near the valve has a slot for mounting a mounting plate. The mounting plate is a vertically arranged rectangular plate structure. A support plate for mounting support components is vertically welded to the upper part of the mounting plate furthest from the soil chamber plate. A reinforcing rib for supporting the support plate is fixedly welded to the center of the lower end face of the support plate. The weight of the connecting pipe and valve is transferred to the column via the positioning seat, then distributed by the column to the support plate and mounting plate, and finally transmitted to the TBM soil chamber plate. This avoids the long-term concentrated action of the connecting pipe and valve's own weight on a single connection point of the TBM soil chamber plate, effectively alleviating local structural stress.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine technology, and specifically to a protection device for an automatic pressure-maintaining system of a tunnel boring machine. Background Technology

[0002] A tunnel boring machine (TBM), also known as a shield tunneling machine or full-face tunnel boring machine, is a type of tunnel boring machine that uses the shield method. The TBM construction method involves laying supporting tunnel segments while the machine is excavating. This machine is characterized by its ability to complete the tunnel excavation in a single operation, handling everything from excavation and advancement to support. It can increase the efficiency of subway tunneling by 8 to 10 times.

[0003] Application number CN202421377808.7 discloses a protective device for an automatic pressure-holding system of a tunnel boring machine. This innovatively modifies the commonly used open, unprotected automatic connection port by utilizing buoyancy and air bubbles generated by the automatic pressure-holding system's exhaust to prevent mud and water from entering the tunnel boring machine's soil chamber, thus protecting the automatic pressure-holding system. By employing the buoyancy of hollow rubber balls, the balls can move freely up and down within the bell-shaped opening, reducing the cross-sectional area of ​​the passage at the opening and increasing the flow velocity of compressed air, effectively blowing away the mud and water. Simultaneously, the rubber material provides good resistance to splashed rock debris generated by the cutting tools squeezing rocks within the soil chamber, reducing wear and increasing the service life of the hollow rubber balls. However, the above design still has shortcomings. In the connecting pipe structure of the device, a control valve is installed at the end away from the soil plate of the tunnel boring machine, but the connecting pipe as a whole is not equipped with any support mechanism. In actual application scenarios, the weight of the connecting pipe itself and the valve lacks effective bearing capacity, and it only relies on the connection part with the soil plate to bear the force. Long-term use is prone to deformation and displacement of the connecting pipe, and may even affect the sealing performance of the connection with the soil plate, thereby posing a potential risk to the normal operation of the automatic pressure holding system.

[0004] Therefore, we propose a protection device for the automatic pressure-maintaining system of tunnel boring machines. Utility Model Content

[0005] The main objective of this invention is to provide a protective device for an automatic pressure-holding system of a tunnel boring machine (TBM). The device, through the coordinated action of the mounting plate, support plate, and support components, constructs a complete load transfer path. The weight of the connecting pipes and valves is transferred to the column via the positioning seat, then distributed from the column to the support plate and mounting plate, and finally transmitted to the TBM soil chamber plate. This avoids the long-term concentrated action of the connecting pipes and valves on a single connection point of the TBM soil chamber plate due to their own weight, effectively alleviating local structural stress and ensuring the structural stability of the automatic pressure-holding system. This effectively solves the problems in the background technology.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A protective device for an automatic pressure-maintaining system of a tunnel boring machine (TBM) includes a TBM soil chamber plate, a connecting pipe, a valve, and an operating wheel. A horizontally installed connecting pipe is fixedly mounted through the TBM soil chamber plate. A valve is fitted to the end of the connecting pipe away from the TBM soil chamber plate. An operating wheel is connected to the top of the valve. The valve is located on one side of the TBM soil chamber plate. A slot for mounting a mounting plate is provided on the lower part of the TBM soil chamber plate near the valve. The mounting plate is a vertically arranged rectangular plate structure. A support plate for mounting a support assembly is vertically welded to the upper part of the mounting plate on the side away from the TBM soil chamber plate. A reinforcing rib for supporting the support plate is fixedly welded to the center of the lower end face of the support plate. The support assembly includes a column, a positioning seat, a fastener, and a first bolt. The upper surface of the support plate is also equipped with a protection mechanism for protecting the valve. The protection mechanism includes a protective cover, a mesh plate, a movable door, and a second bolt. The protective cover is fastened to both sides of the upper surface of the support plate from top to bottom. The bottom end of the protective cover is snapped into the two sides of the upper surface of the support plate. The protective cover is fixedly connected to the support plate by the second bolt.

[0007] By adopting the above technical solution, the device constructs a complete load transfer path through the synergistic effect of the mounting plate, support plate, and support components. The weight of the connecting pipe and valve is transferred to the column via the positioning seat, and then distributed from the column to the support plate and mounting plate, and finally transmitted to the shield machine soil chamber plate. This avoids the connecting pipe and valve from acting on a single connection point of the shield machine soil chamber plate due to their own weight for a long time, effectively alleviating local structural stress and ensuring the structural stability of the automatic pressure holding system.

[0008] Specifically, mesh plates are fixedly embedded on both sides of the protective cover, and two mesh plates are arranged in parallel with each other, with the valve located between the two mesh plates.

[0009] Specifically, the protective cover is an inverted U-shaped structure with openings at both ends and an operating port at the center of the top. A movable door is rotatably connected to the top of the protective cover on the side of the operating port.

[0010] Specifically, the mounting plate has a protrusion at the center of the side away from the support plate. The end of the protrusion away from the mounting plate is inserted into the slot. The mounting plate is fixedly connected to one side of the tunnel boring machine's soil chamber plate by a third bolt. A rubber pad is fixedly glued to the side of the mounting plate near the protrusion.

[0011] Specifically, two sets of support components are arranged in parallel, the valve is located between the two sets of support components, and multiple columns are arranged in parallel, with the top of the column vertically inserted into both ends of the bottom of the positioning seat.

[0012] Specifically, the top of the positioning seat is provided with an arc-shaped groove that matches the connecting pipe, and a fastener is installed on the top of the positioning seat. Both ends of the fastener are fixedly connected to the top of the positioning seat by a first bolt.

[0013] The beneficial effects of this utility model are as follows: The shield machine automatic pressure holding system protection device described in this utility model constructs a complete load transfer path through the synergistic action of the mounting plate, support plate, and support components. The weight of the connecting pipe and valve is transferred to the column via the positioning seat, and then distributed by the column to the support plate and mounting plate, and finally transmitted to the shield machine soil chamber plate. This avoids the long-term concentrated action of the connecting pipe and valve on a single connection point of the shield machine soil chamber plate due to their own weight, effectively alleviating local structural stress and ensuring the structural stability of the automatic pressure holding system. The mesh plates on both sides of the protective cover form an effective physical protective barrier, which can directly block the impact of debris such as stone chips, mud, and metal fragments splashed in the shield machine's operating environment on the valves, thereby extending the service life of the valves. Through the design of the operating port and movable door at the top of the protective cover, the device can maintain a long-term protective state by closing the movable door without disassembling the protective cover, and can quickly open the movable door when the valve needs to be operated. The operating wheel can be conveniently controlled through the operating port, avoiding the decrease in protective efficiency and component wear caused by frequent disassembly of the protective cover. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a perspective view of the positioning seat of this utility model; In the diagram: 1. Shield machine soil chamber plate; 2. Connecting pipe; 3. Valve; 4. Operating wheel; 5. Protection mechanism; 6. Protective cover; 7. Mesh plate; 8. Operating port; 9. Movable door; 10. Slot; 11. Mounting plate; 12. Rubber pad; 13. Support assembly; 14. Support plate; 15. Column; 16. Positioning seat; 17. Fastener; 18. First bolt; 19. Protrusion; 20. Reinforcing rib; 21. Arc groove. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] As one embodiment of this utility model, such as Figures 1-3As shown, the present invention discloses an automatic pressure-maintaining system protection device for a tunnel boring machine, comprising a tunnel boring machine soil chamber plate 1, a connecting pipe 2, a valve 3, and an operating wheel 4. The connecting pipe 2 is fixedly installed through the tunnel boring machine soil chamber plate 1. The valve 3 is fitted at the end of the connecting pipe 2 away from the tunnel boring machine soil chamber plate 1. The operating wheel 4 is connected to the top of the valve 3. The valve 3 is located on one side of the tunnel boring machine soil chamber plate 1. The lower part of the tunnel boring machine soil chamber plate 1 near the valve 3 is provided with a slot 10 for mounting a mounting plate 11. The mounting plate 11 is a vertically arranged rectangular plate structure. A support plate 14 for mounting a support assembly 13 is vertically welded to the upper part of the mounting plate 11 away from the tunnel boring machine soil chamber plate 1. A reinforcing rib 20 for supporting the support plate 14 is fixedly welded at the center of the lower end face of the support plate 14. The support assembly 13 includes a column 15, a positioning seat 16, a fastener 17, and a first bolt 18. The upper surface of the support plate 14 is also equipped with a protection mechanism 5 for protecting the valve 3. The protection mechanism 5 includes a protective cover 6, a mesh plate 7, a movable door 9, and a second bolt. The protective cover 6 is fastened to both sides of the upper surface of the support plate 14 from top to bottom. The bottom end of the protective cover 6 is snapped into the two sides of the upper surface of the support plate 14. The protective cover 6 is fixedly connected to the support plate 14 by the second bolt.

[0018] In use, valve 3 is located between two sets of support components 13, and connecting pipe 2 is located in the arc groove 21 at the top of positioning seat 16. Fastener 17 is placed over the connection between connecting pipe 2 and positioning seat 16. Fastener 17 is fixedly connected to the top of positioning seat 16 at both ends by first bolt 18. The weight of connecting pipe 2 and valve 3 is transferred to column 15 through positioning seat 16, and then transferred to support plate 14 and mounting plate 11 by column 15, and finally distributed to shield machine soil chamber plate 1.

[0019] This utility model also includes that mesh plates 7 are fixedly embedded on both sides of the protective cover 6, and two mesh plates 7 are arranged in parallel with each other, with the valve 3 located between the two mesh plates 7.

[0020] The present invention also includes that the protective cover 6 is an inverted U-shaped structure, with openings at both ends of the protective cover 6, an operation port 8 at the center of the top of the protective cover 6, and a movable door 9 rotatably connected to the top of the protective cover 6 on one side of the operation port 8.

[0021] The present invention also includes a protrusion 19 provided in the center of the side of the mounting plate 11 away from the support plate 14, the end of the protrusion 19 away from the mounting plate 11 being inserted into the slot 10, the mounting plate 11 being fixedly connected to one side of the shield machine soil chamber plate 1 by a third bolt, and a rubber pad 12 being fixedly glued to the side of the mounting plate 11 near the protrusion 19.

[0022] This utility model also includes two sets of support components 13 arranged in parallel, the valve 3 located between the two sets of support components 13, and multiple columns 15 arranged in parallel, with the top of the column 15 vertically inserted into both ends of the bottom of the positioning seat 16.

[0023] The present invention also includes an arc-shaped groove 21 at the top of the positioning seat 16 that is adapted to the connecting pipe 2, and a fastener 17 installed at the top of the positioning seat 16. Both ends of the fastener 17 are fixedly connected to the top of the positioning seat 16 by a first bolt 18.

[0024] In use, the shield machine soil hopper plate 1 has a slot 10 on the lower part of the side near the valve 3. The protrusion 19 on the center of the side of the mounting plate 11 connected to the support plate 14 is precisely inserted into the slot 10. The mounting plate 11 is fixedly connected to the side of the shield machine soil hopper plate 1 using the third bolt. The lower end face of the support plate 14 is fixedly welded with a reinforcing rib 20. The setting of the reinforcing rib 20 can greatly improve the load-bearing capacity of the support plate 14. Two sets of relatively parallel support components 13 are installed on the upper end face of the support plate 14. The valve 3 is located between the two sets of support components 13. The connecting pipe 2 is located in the arc groove 21 at the top of the positioning seat 16. The fastener 17 is covered at the connection between the connecting pipe 2 and the positioning seat 16. The two ends of the fastener 17 are fixedly connected to the top of the positioning seat 16 by the first bolt 18. The weight of the connecting pipe 2 and the valve 3 is transmitted to the column 15 through the positioning seat 16, and then transmitted to the support plate 14 and the mounting plate 11 by the column 15, and finally distributed on the shield machine soil hopper plate 1. Both sides of the protective cover 6 are fixedly inlaid with mesh plates 7, and the valve 3 is located between the two mesh plates 7. The mesh plates 7 can not only block the impact of debris such as stone chips and mud water splashed in the working environment of the tunnel boring machine on the valve 3, but also ensure the air circulation and prevent the valve 3 from rusting due to being in a closed environment for a long time. The protective cover 6 has an operating port 8 at the top center. When it is necessary to rotate the operating wheel 4 to control the valve 3, the movable door 9 connected to the top of the protective cover 6 at the side of the operating port 8 can be opened. The valve can be easily operated through the operating port 8. After the operation is completed, the movable door 9 is closed to continue to protect the valve 3.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A protective device for an automatic pressure-maintaining system of a tunnel boring machine, characterized in that, The shield machine includes a soil chamber plate (1), a connecting pipe (2), a valve (3), and an operating wheel (4). A horizontally installed connecting pipe (2) is fixedly installed through the soil chamber plate (1). A valve (3) is installed at the end of the connecting pipe (2) away from the soil chamber plate (1). An operating wheel (4) is connected to the top of the valve (3). The valve (3) is located on one side of the soil chamber plate (1). A mounting plate (1) is provided on the lower part of the soil chamber plate (1) near the valve (3). 1) The slot (10), the mounting plate (11) is a vertically arranged rectangular plate structure, the mounting plate (11) has a support plate (14) for installing the support assembly (13) vertically welded on the upper part of the side away from the shield machine soil plate (1), the support plate (14) has a reinforcing rib (20) for supporting the support plate (14) fixedly welded at the center of the lower end face of the support plate (14), the support assembly (13) includes a column (15), a positioning seat (16), a fastener (17) and a first bolt (18); The upper end face of the support plate (14) is also equipped with a protection mechanism (5) for protecting the valve (3). The protection mechanism (5) includes a protective cover (6), a mesh plate (7), a movable door (9), and a second bolt. The protective cover (6) is fastened to both sides of the upper end face of the support plate (14) from top to bottom. The bottom end of the protective cover (6) is snapped into the two sides of the upper end face of the support plate (14). The protective cover (6) is fixedly connected to the support plate (14) by the second bolt.

2. The shield machine automatic pressure-maintaining system protection device according to claim 1, characterized in that, The protective cover (6) has mesh plates (7) fixedly embedded on both sides. Two mesh plates (7) are arranged in parallel with each other, and the valve (3) is located between the two mesh plates (7).

3. The shield machine automatic pressure-maintaining system protection device according to claim 2, characterized in that, The protective cover (6) is an inverted U-shaped structure. Both ends of the protective cover (6) are provided with openings. The top of the protective cover (6) is provided with an operation port (8) in the middle. The top of the protective cover (6) is rotatably connected to the operation port (8) on one side.

4. The shield machine automatic pressure-maintaining system protection device according to claim 1, characterized in that, The mounting plate (11) has a protrusion (19) in the center on the side away from the support plate (14). The end of the protrusion (19) away from the mounting plate (11) is inserted into the slot (10). The mounting plate (11) is fixedly connected to one side of the shield machine soil chamber plate (1) by a third bolt. A rubber pad (12) is fixedly glued to the side of the mounting plate (11) near the protrusion (19).

5. The shield machine automatic pressure-maintaining system protection device according to claim 1, characterized in that, The support components (13) are arranged in two parallel groups, the valve (3) is located between the two groups of support components (13), and multiple columns (15) are arranged in parallel. The top of the column (15) is inserted vertically into both ends of the bottom of the positioning seat (16).

6. The shield machine automatic pressure-maintaining system protection device according to claim 5, characterized in that, The top of the positioning seat (16) is provided with an arc groove (21) that is compatible with the connecting pipe (2). The top of the positioning seat (16) is equipped with a fastener (17). Both ends of the fastener (17) are fixedly connected to the top of the positioning seat (16) by the first bolt (18).

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