A shield tunneling in-bay visualization device

Abstract

The application discloses a kind of shield bin visualization devices, specifically relates to the technical field of shield machine, including support, support fixed installation is at the bottom of shield bin, support is installed with the mesh that can rotate around its own axis, the upper side of mesh is provided with processing box, when mesh rotates, top linear velocity direction points to processing box, so that mesh will foreign matter push into processing box when rotating, processing box is provided with visualization monitoring device, visualization monitoring device is connected with PC communication.This application when muck passes through mesh, mesh rotates constantly, and because foreign matter is larger, so mesh can lift foreign matter upward to the front side of upper portion of mesh, and because top linear velocity direction of mesh points to processing box, so mesh can also push foreign matter into processing box in the process of rotating to facilitate discharge, by visualization monitoring device, foreign matter in processing box is monitored in real time, when foreign matter or more foreign matter appears, can open bin processing.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine technology, and more specifically, to a visualization device for the tunnel boring machine chamber. Background Technology

[0002] A tunnel boring machine (TBM) mainly consists of a cutterhead, main drive unit, front shield, middle shield, propulsion cylinders, articulated cylinders, segment installer, pressure chamber, and screw conveyor. It is used to excavate, advance, remove muck, and install segments along the tunnel. During operation, the excavated soil from the cutterhead enters the soil chamber through openings on the cutterhead. Inside the soil chamber, the soil is mixed and improved into a fluid state. The thrust of the TBM propulsion cylinders is transferred to the soil chamber through pressure-bearing baffles, and then to the excavation face to balance the groundwater pressure and soil pressure, thus maintaining the stability of the excavation face. The screw conveyor extends into the soil chamber through openings in the pressure-bearing baffles to remove excavated soil.

[0003] With the further expansion of tunnel applications, tunnel boring machines (TBMs), as one of the main construction methods, are being used more and more frequently. At the same time, the geological conditions encountered during TBM construction are becoming more complex (uneven strata, weak and fractured strata, bedrock protrusions, etc.) and the environment is also more complex (crossing pile foundations, existing pipelines, etc.), often requiring the cutting of foreign objects such as reinforcing bars and boulders. When foreign objects, boulders, or reinforcing bars become stuck in the TBM's soil chamber, if they are not removed or handled in a timely manner, it can lead to equipment damage, affect spoil removal, and reduce construction efficiency.

[0004] Currently, foreign objects are inside the tunnel boring machine (TBM) chamber and cannot be easily removed. However, due to a lack of understanding of the situation inside the chamber, timely opening and handling are not possible, thus affecting construction efficiency. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a visualization device for tunnel boring machine chamber, which can remove foreign objects inside the tunnel boring machine chamber and perform visual monitoring.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A visualization device for tunnel boring machine (TBM) chambers includes a support frame, which is fixedly installed at the bottom of the TBM chamber. A mesh plate that can rotate around its own axis is mounted on the support frame. A processing box is provided on one side of the upper part of the mesh plate. When the mesh plate rotates, the linear velocity direction of its top end points towards the processing box, thereby pushing foreign objects into the processing box when the mesh plate rotates. A visualization monitoring device is provided on the processing box, and the visualization monitoring device is communicatively connected to a PC.

[0008] Preferably, the mesh plate consists of a ring and mesh rods fixedly installed inside the ring. Multiple mesh rods are provided and arranged in a crisscross pattern. The edge of the ring is located inside the support and is rotatably connected to the support.

[0009] Preferably, each pole has multiple protrusions along its length.

[0010] Preferably, the mesh plate is located in front of the bottom end of the screw conveyor of the tunnel boring machine.

[0011] Preferably, a flexible shaft is fixedly connected to the middle of the mesh plate, and the mesh plate is fixedly connected to the hinge shaft of the screw conveyor of the tunnel boring machine through the flexible shaft.

[0012] Preferably, the upper end of the mesh plate is inclined toward the screw conveyor and the inclination angle ranges from 30° to 60°.

[0013] Preferably, the processing box includes a slag inlet box and a slag outlet box located above the slag inlet box and tilted downwards. The bottom of the slag inlet box has a slag inlet. After foreign objects enter through the slag inlet box, they enter the slag outlet box through the slag inlet box.

[0014] Preferably, a baffle is fixedly connected to the bottom of the slag inlet, one side of the baffle is located on the front surface of the screen plate, and the end of the baffle near the middle of the screen plate is inclined upward, and the bottom of the inner side of the slag inlet box is an arc-shaped surface.

[0015] Preferably, the upper end of the slag inlet box is provided with an extrusion assembly, which includes a movable shaft that is movably inserted into the upper end of the slag inlet box. A pressure plate is fixedly connected to the bottom end of the movable shaft. A fixed cylinder is fixedly connected to the upper end of the slag inlet box. A spring is provided inside the fixed cylinder, and the two ends of the spring press against the ends of the fixed cylinder and the movable shaft.

[0016] Preferably, the visual monitoring device includes camera one and camera two, with camera one installed on the side wall of the slag inlet box and camera two installed on the side wall of the slag outlet box.

[0017] The technical effects and advantages of this invention are as follows:

[0018] 1. When the excavated soil passes through the mesh plate, the mesh plate rotates continuously. Because the foreign object is large, the mesh plate can lift the foreign object to the front side of the upper part of the mesh plate. Since the linear velocity direction of the top of the mesh plate is pointing towards the processing box, the mesh plate can also push the foreign object into the processing box for easy discharge during the rotation process.

[0019] 2. Foreign objects inside the processing box can be monitored in real time through a visual monitoring device. When foreign objects are found or there are many foreign objects, the box can be opened for processing.

[0020] 3. Using the existing screw conveyor of the tunnel boring machine to drive the mesh plate rotation can save costs and will not hinder the entry of excavated soil into the screw conveyor. Alternatively, a separate power unit can be set up, but this will inevitably affect the flow of excavated soil.

[0021] 4. The baffles serve several purposes: firstly, they scrape the mesh to ensure the smooth flow of excavated soil; secondly, they prevent foreign objects from clogging the mesh openings; and thirdly, when the mesh pushes foreign objects into the slag inlet box, the baffles act as guides, and the upward-sloping baffles accelerate the entry of foreign objects into the slag inlet box for easy removal. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment.

[0023] Figure 2 This is a schematic diagram of the structure for installing the mesh panel in an example.

[0024] Figure 3 for Figure 2 A sectional view.

[0025] Figure 4 This is a schematic diagram of the processing box.

[0026] Figure 5 for Figure 4 Cross-section Figure 1 .

[0027] Figure 6 for Figure 4 Cross-section Figure 2 .

[0028] The attached figures are labeled as follows:

[0029] 1. Support frame; 2. Mesh plate; 21. Ring; 22. Mesh rod; 23. Protrusion; 3. Flexible shaft; 4. Processing box; 41. Slag inlet box; 411. Slag inlet; 412. Baffle; 413. Arc-shaped surface; 42. Slag outlet box; 421. Box door; 43. Extrusion assembly; 431. Movable shaft; 432. Pressure plate; 433. Fixed cylinder; 434. Spring; 5. Visual monitoring device; 51. Camera 1; 52. Camera 2; 6. Screw conveyor. Detailed Implementation

[0030] Example

[0031] like Figures 1 to 6 As shown, this embodiment provides a visualization device inside the shield tunnel chamber, including a bracket 1. The bracket 1 is fixedly installed at the bottom of the shield tunnel chamber. A mesh plate 2 that can rotate around its own axis is installed on the bracket 1. A processing box 4 is provided on one side of the upper part of the mesh plate 2. When the mesh plate 2 rotates, the linear velocity direction of the top end points to the processing box 4, so that the mesh plate 2 pushes foreign objects into the processing box 4 when rotating. A visualization monitoring device 5 is provided on the processing box 4, and the visualization monitoring device 5 is communicatively connected to a PC.

[0032] The shield chamber, also known as the shield soil chamber, contains foreign objects such as reinforcing bars, boulders, and broken shield cutterheads that cannot be discharged. The mesh plate 2 is located in front of the bottom of the screw conveyor 6 of the shield machine. During the discharge of excavated soil, the soil first passes through the mesh plate 2 and then enters the screw conveyor 6 for discharge. As the soil passes through the mesh plate 2, the mesh plate 2 rotates continuously. Due to the large size of the foreign objects, the mesh plate 2 can lift them upwards to the front of its upper part. Since the linear velocity direction of the top of the mesh plate 2 points towards the processing box 4, the mesh plate 2 can also push the foreign objects into the processing box 4 for easy discharge during rotation. The visual monitoring device 5 monitors the foreign objects in the processing box 4 in real time. When foreign objects are present or there are many foreign objects, the chamber can be opened for processing.

[0033] In this embodiment, as Figure 1 and Figure 2 As shown, the mesh panel 2 consists of a circular ring 21 and mesh rods 22 fixedly installed inside the circular ring 21. Multiple mesh rods 22 are arranged in a crisscross pattern. The edge of the circular ring 21 is located inside the support 1 and is rotatably connected to the support 1. The crisscrossing mesh rods 22 form a grid mesh, through which excavated soil passes, while larger foreign objects cannot pass.

[0034] Furthermore, each mesh pole 22 is provided with multiple protrusions 23 along its length. The protrusions 23 increase the friction between the pole and the foreign object, making it easier to lift the foreign object upward when the mesh plate 2 rotates.

[0035] Furthermore, a flexible shaft 3 is fixedly connected to the middle of the mesh plate 2, and the mesh plate 2 is fixedly connected to the hinge shaft of the screw conveyor 6 of the tunnel boring machine via the flexible shaft 3. That is, using the existing device to drive the mesh plate 2 to rotate can save costs and will not hinder the entry of the excavated soil into the screw conveyor 6. Alternatively, a separate power unit can be set up, but it will inevitably affect the flow of the excavated soil.

[0036] Furthermore, the upper end of the mesh plate 2 is inclined towards the screw conveyor 6, and the inclination angle ranges from 30° to 60°. Preferably, it is 45°. The inclined mesh plate 2 can facilitate the passage of slag and soil, and accelerate the lifting of foreign objects.

[0037] In this embodiment, as Figure 4 and Figure 5 As shown, the processing box 4 includes a slag inlet box 41 and a slag outlet box 42 located above the slag inlet box 41 and tilted downwards. The bottom of the slag inlet box 41 has a slag inlet 411. Foreign objects enter through the slag inlet 411 and then enter the slag outlet box 42. After entering the slag outlet box 42, it is convenient for staff to open and process the foreign objects. A door 421 for opening and closing the slag outlet box 42 can be provided at the outlet of the slag outlet box 42.

[0038] Furthermore, a baffle 412 is fixedly connected to the bottom of the slag inlet 411. One side of the baffle 412 is located on the front surface of the mesh plate 2, and the end of the baffle 412 near the middle of the mesh plate 2 is inclined upwards. The bottom of the inner side of the slag inlet box 41 is an arc-shaped surface 413. On the one hand, the baffle 412 can scrape the mesh plate 2 to ensure the flow effect of the slag through the mesh plate 2. On the other hand, it can prevent foreign objects from blocking the mesh holes. Furthermore, when the mesh plate 2 pushes foreign objects into the slag inlet box 41, the baffle 412 acts as a guide. The upwardly inclined baffle 412 can accelerate the entry of foreign objects into the interior of the slag inlet box 41, so as to facilitate the removal of foreign objects.

[0039] Furthermore, an extrusion assembly 43 is provided at the upper end of the slag inlet box 41. The extrusion assembly 43 includes a movable shaft 431 movably inserted into the upper end of the slag inlet box 41. A pressure plate 432 is fixedly connected to the bottom end of the movable shaft 431. A fixed cylinder 433 is fixedly connected to the upper end of the slag inlet box 41. A spring 434 is provided inside the fixed cylinder 433. The two ends of the spring 434 press against the ends of the fixed cylinder 433 and the movable shaft 431. The pressure plate 432 blocks the upper end of the slag inlet box 41. When foreign objects are discharged upward from the slag inlet box 41, they squeeze the pressure plate 432, and the spring 434 is compressed. After being squeezed to a certain extent, the pressure plate 432 opens the upper end of the slag inlet box 41, and foreign objects can enter the interior of the slag outlet box 42. The extrusion assembly 43 ensures that the earth pressure inside the shield chamber is maintained within a reasonable range.

[0040] In this embodiment, as Figure 5 As shown, the visual monitoring device 5 includes camera 51 and camera 52. Camera 51 is installed on the side wall of the slag inlet box 41, and camera 52 is installed on the side wall of the slag outlet box 42. Cameras 51 and 52 monitor foreign objects in the slag inlet box 41 and slag outlet box 42 respectively, and the images are visualized through the image processing system of a PC, thus allowing staff to monitor the foreign object situation in real time.

[0041] Working principle:

[0042] When the tunnel boring machine is working, the excavated soil flows through the mesh plate 2 to the bottom of the screw conveyor 6, and is then discharged by the screw conveyor 6. When the internal hinge shaft of the screw conveyor 6 rotates, it can drive the mesh plate 2 to rotate through the flexible shaft 3. Foreign objects are filtered out by the mesh plate 2 and are driven upward by the rotation of the mesh plate 2 (lifted upward). Since the linear velocity direction of the top of the mesh plate 2 points towards the processing box 4, the foreign objects will continuously accumulate towards the slag inlet 411 of the slag inlet box 41. During the continuous pushing process, the foreign objects will flow upward along the slag inlet box 41, squeezing the pressure plate 432. When the squeezing reaches a certain degree, the pressure plate 432 opens, and the foreign objects enter the interior of the slag outlet box 42 for collection. The internal conditions of the slag inlet box 41 and the slag outlet box 42 are monitored by camera 1 51 and camera 2 52 to facilitate the opening and processing by the staff.

[0043] Alternatively, a pressure sensor can be installed at the position of spring 434 to monitor the elastic force of spring 434. Based on the pressure, it can be determined whether there are foreign objects stuck inside the slag inlet box 41 that cannot enter the slag outlet box 42. If so, the box can be opened in time for processing.

Claims

1. A visualization device for tunnel boring machine (TBM) chambers, comprising a support frame (1), characterized in that: The bracket (1) is fixedly installed at the bottom of the shield chamber. A mesh plate (2) that can rotate around its own axis is installed on the bracket (1). A processing box (4) is provided on one side of the upper part of the mesh plate (2). When the mesh plate (2) rotates, the linear velocity direction of the top end points to the processing box (4), so that the mesh plate (2) pushes foreign objects into the processing box (4) when rotating. A visual monitoring device (5) is provided on the processing box (4). The visual monitoring device (5) is connected to a PC. The mesh plate (2) consists of a ring (21) and mesh rods (22) fixedly installed inside the ring (21). Multiple mesh rods (22) are provided and arranged in a crisscross pattern. The edge of the ring (21) is located inside the bracket (1) and is rotatably connected to the bracket (1). Each of the aforementioned poles (22) has multiple protrusions (23) along its length. The mesh plate (2) is located in front of the bottom end of the screw conveyor (6) of the tunnel boring machine; A flexible shaft (3) is fixedly connected to the middle of the mesh plate (2), and the mesh plate (2) is fixedly connected to the hinge shaft of the screw conveyor (6) of the tunnel boring machine through the flexible shaft (3). The upper end of the mesh plate (2) is inclined toward the screw conveyor (6); The processing box (4) includes a slag inlet box (41) and a slag outlet box (42) located above the slag inlet box (41) and tilted downwards. Foreign objects enter through the slag inlet (411) and then enter the slag outlet box (42) through the slag inlet box (41). The bottom of the slag inlet (411) is fixedly connected to a baffle (412). One side of the baffle (412) is located on the front surface of the screen (2), and the end of the baffle (412) near the middle of the screen (2) is inclined upward. The bottom of the inner side of the slag inlet box (41) is an arc-shaped surface (413). The upper end of the slag inlet box (41) is provided with an extrusion assembly (43). The extrusion assembly (43) includes a movable shaft (431) that is movably inserted into the upper end of the slag inlet box (41). The bottom end of the movable shaft (431) is fixedly connected with a pressure plate (432). The upper end of the slag inlet box (41) is fixedly connected with a fixed cylinder (433). The inner side of the fixed cylinder (433) is provided with a spring (434). The two ends of the spring (434) press against the ends of the fixed cylinder (433) and the movable shaft (431). The bottom of the slag inlet box (41) is provided with a slag inlet (411). When the screen plate (2) rotates, the linear velocity direction of its top end points to the slag inlet (411) of the processing box (4), so that the rotating screen plate (2) can lift the intercepted foreign objects upward and push them laterally into the processing box (4).

2. The visualization device inside a tunnel boring machine chamber according to claim 1, characterized in that: The upper end of the mesh plate (2) is inclined at an angle of 30°-60° toward the screw conveyor (6).

3. The visualization device inside a tunnel boring machine chamber according to claim 1, characterized in that: The visualization monitoring device (5) includes a camera one (51) and a camera two (52). The camera one (51) is installed on the side wall of the slag inlet box (41), and the camera two (52) is installed on the side wall of the slag outlet box (42).

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