Shield tail brush apparatus for narrow environments

Abstract

The utility model relates to a shield tail brush device for narrow environment belongs to shield tail brush device technical field, especially a kind of shield tail brush device for narrow environment. Its including bottom plate, lower bending piece, steel wire bundle layer, upper bending piece subassembly and cover plate, the length of lower bending piece is shorter than the length of steel wire bundle layer, the length of steel wire bundle layer is shorter than the length of upper bending piece subassembly, to form multistage ladder structure. The utility model has the beneficial effects that: the length of bottom plate, lower bending piece, steel wire bundle layer and upper bending piece subassembly is optimized in this technical scheme, forms multistage ladder structure, effectively reduces the occupied space of overall device, so that it can adapt to the installation demand of narrow environment.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine technology, and in particular to a shield tail brush device for use in narrow environments. Background Technology

[0002] With the development of tunnel boring machine (TBM) technology, the tail brush, as an important component of the TBM's sealing system, plays a crucial role in preventing groundwater and sediment from seeping into the tunnel. However, current technologies lack real-time monitoring methods for the stress experienced by the tail brush during actual operation, making it impossible to promptly grasp its wear, deformation, or failure status, thus affecting the safety and efficiency of TBM construction.

[0003] Currently, during the use of tunnel boring machines (TBMs), the standard-sized tail brush often deforms due to the entry of gravel or semi-solid oil, necessitating replacement of the corresponding tail brush. However, the space for the original standard-sized tail brush may be reduced due to semi-solid oil or compression, making it impossible to install or resulting in poor sealing.

[0004] A search revealed a shield tail sealing brush and shield tail sealing structure with patent number CN108868792B, published on February 27, 2024. This design utilizes a multi-layered sealing structure formed by a front elastic plate, a middle elastic plate, and a rear elastic plate, with a sealing block sandwiched between adjacent elastic plates. This improves sealing performance and durability, making it suitable for various burial depths and pressure environments. However, this structure has limitations in confined spaces: the combination of multiple elastic plates and sealing blocks creates a complex and large structure, making it difficult to adapt to space constraints caused by localized compression or foreign object intrusion, leading to installation difficulties or decreased sealing performance.

[0005] In addition, a patent with patent number CN113944471B, concerning a tunnel boring machine and its tail sealing brush, was found, with an authorization announcement date of 2024-01-19. This invention employs a design combining wire brushes with front and rear protective brushes. The protective brushes are composed of alternately stacked support plates, partition plates, and integral plates, enhancing elasticity and fit, thereby improving the sealing effect. However, this structure also suffers from large size and high rigidity. In situations where space is limited in the tail brush installation area due to geological changes or equipment wear, effective installation and sealing are difficult to achieve, limiting its application in confined environments.

[0006] The aforementioned problems indicate that existing tail brush devices generally suffer from issues such as mismatched structural dimensions, installation difficulties, and reduced sealing performance when facing narrow installation environments caused by complex geological conditions, limited space, or local deformation. These shortcomings make it difficult to meet the actual needs of modern tunnel boring machines for highly adaptable sealing systems. Therefore, this invention provides a tail brush device for narrow environments to overcome these deficiencies and offer a more compact, flexible, and adaptable new solution. Utility Model Content

[0007] The purpose of this invention is to provide a shield tail brush device for use in confined environments, in order to overcome the aforementioned shortcomings of the existing technology.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A shield tail brush device for use in confined environments includes a base plate, a lower bending plate, a wire bundle layer, an upper bending plate assembly, and a cover plate. The device is characterized in that the length of the lower bending plate is shorter than the length of the wire bundle layer, and the length of the wire bundle layer is shorter than the length of the upper bending plate assembly, thereby forming a multi-level stepped structure.

[0010] Preferably, the base plate is located at the bottom layer and is provided with a plurality of positioning holes; the lower bending piece is located above the base plate and is curved toward the side opposite to the base plate; the steel wire bundle layer is located above the lower bending piece; the upper bending piece assembly is located above the steel wire bundle layer; and the cover plate is located at the top layer and is fixedly connected to the base plate by bolts.

[0011] Preferably, the upper bending sheet assembly includes a left inner protective sheet, a right inner protective sheet, and an outer front protective sheet.

[0012] Preferably, the left inner protective sheet and the right inner protective sheet are arranged alternately, with their ends overlapping each other, and the outer front protective sheet is located between the left inner protective sheet and the right inner protective sheet.

[0013] Preferably, the tilt angle of the lower folded piece is 10° to 50°.

[0014] Preferably, the wire bundle layer is composed of several highly elastic steel wires.

[0015] Preferably, the top of the cover plate is provided with several through holes, which correspond to the positioning holes on the bottom plate. High-strength bolts are used to pass through the through holes and cooperate with the positioning holes.

[0016] Preferably, the length of the base plate is shorter than the length of the lower bending piece.

[0017] Preferably, a spring plate is also provided below the lower bent piece.

[0018] The beneficial effects of this utility model are: by optimizing the length of the base plate, lower bending plate, steel wire bundle layer and upper bending plate assembly, this technical solution forms a multi-level stepped structure, which effectively reduces the space occupied by the overall device and enables it to adapt to the installation requirements of narrow environments.

[0019] By shortening the length of the lower bending piece and reducing the turning radius, it can be installed smoothly in space-constrained conditions and cover other components in sequence, thus solving the installation difficulties caused by space reduction in the prior art.

[0020] By setting up a superimposed structure of left inner protective plate, right inner protective plate and outer front protective plate, the stability and protection performance of the overall device are enhanced. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a shield tail brush device for use in confined environments according to the present invention;

[0022] Figure 2 This is a schematic diagram of the surface structure of the equipment frame of a shield tail brush device for use in confined environments according to the present invention;

[0023] Figure 3 This is a schematic diagram of a robotic arm module for a shield tail brush device used in confined environments according to the present invention.

[0024] Figure 4 This is a cross-sectional schematic diagram of the suction unit of a shield tail brush device for use in confined environments according to the present invention;

[0025] In the diagram: 1. Base plate; 2. Lower bending plate; 3. Steel wire bundle layer; 4. Upper bending plate assembly; 5. Cover plate; 6. Left inner protective plate; 7. Right inner protective plate; 8. Outer front protective plate; 9. Spring plate. Detailed Implementation

[0026] Reference Figures 1 to 4 A shield tail brush device for use in confined environments includes a base plate 1, a lower bending plate 2, a steel wire bundle layer 3, an upper bending plate assembly 4, and a cover plate 5.

[0027] The base plate 1 is located at the bottom of the entire tail shield brush, and is used to support other components and provide basic support. The lower folded plate 2 is set above the base plate 1, and it is curved upwards on the side away from the base plate 1 to form a certain arc to adapt to the actual working requirements of the tail shield brush. The wire bundle layer 3 is set above the lower folded plate 2, and as the core working part of the tail shield brush, it is used to contact the tunnel wall and achieve the sealing function. The upper folded plate assembly 4 is set above the wire brush assembly 3, and it is also curved upwards on the side away from the base plate 2.

[0028] The base plate 1 is located at the bottom of the entire tail brush assembly, and as the closest mounting part, it directly contacts the installation position of the tunnel boring machine. The bottom of the base plate 1 has several positioning holes for securing it to the installation position on the tunnel boring machine using bolts or other fasteners. The base plate 1 is designed to be the shortest part of the entire assembly, and different lengths of base plate 1 can be replaced to adapt to different installation environments. In practical applications, the function of the base plate 1 is to provide a stable foundation for the entire tail brush assembly and ensure that other components can be stacked on top of it.

[0029] The downward folding plate 2 has an upward angle of 10° to 50°. This angle is designed to allow the downward folding plate 2 to better adapt to the need for the tail shield brush to conform to the tunnel wall during actual operation. The length of the downward folding plate 2 is slightly longer than that of the base plate 1, but still relatively short compared to other components. This length difference constitutes the first stage of the multi-level stepped structure. The main function of the downward folding plate 2 is to provide flexibility in adapting to the space during device installation, especially in situations where space is limited, its turning radius can effectively avoid interference with obstacles.

[0030] The wire bundle layer 3 is positioned above the lower bending plate 2, and its length is longer than that of the lower bending plate 2, forming the second stage of a multi-level stepped structure. The wire bundle layer 3 is composed of several highly elastic steel wires, with a spacing of 1mm to 3mm between the wires and a thickness of 5mm to 10mm. The steel wire material of the wire bundle layer 3 is selected from alloy steel with high elasticity and wear resistance to ensure its sealing performance and deformation capacity under complex geological conditions. The main function of the wire bundle layer 3 is to serve as the core working part of the shield tail brush, directly contacting the tunnel wall to achieve a sealing effect. Simultaneously, its special wire spacing design allows for a certain degree of deformation, thus adapting to the irregularities of the tunnel wall surface.

[0031] In addition, since the steel wire bundle layer 3 is composed of several groups of steel wires, it can form a multi-level stepped shape, that is, the side closest to the lower bending piece 2 is the shortest, and the length gradually increases to form a stepped arrangement.

[0032] The upper bending plate assembly 2 includes a left inner protective plate 6, a right inner protective plate 7, and an outer front protective plate 8. The left inner protective plate 6 and the right inner protective plate 7 are arranged alternately on the left and right sides, and their ends overlap each other to form a complete protective structure. The outer front protective plate 8 is located in front of the left inner protective plate 6 and the right inner protective plate 7 and is placed between them, which serves to further enhance the structural stability and protection.

[0033] The cover plate 5 is located at the top of the entire tail brush device, and its top has several through holes corresponding to the positioning holes on the base plate 1. High-strength bolts pass through these through holes and mate with the positioning holes on the base plate 1, tightly pressing all components together to ensure the stability of the overall structure. The high-strength bolts have a diameter of 6mm to 10mm to provide sufficient fixing strength. The cover plate 5 is made of high-strength steel to withstand external pressure during construction.

[0034] A spring plate 9 is also provided below the lower bending piece 2, and the spring plate 9 assists in resetting.

[0035] refer to Figure 3 In actual construction, the installation sequence of the shield tail brush device is as follows: first, the base plate 1 is fixed to the installation position of the tunnel boring machine with bolts; then, the lower bending plate 2, the wire bundle layer 3, and the upper bending plate assembly 4 are stacked in sequence; finally, all components are fixed together with the cover plate 5. In narrow environments, due to the shorter length and moderate tilt angle of the lower bending plate 2, its turning radius is small, allowing it to be easily accommodated in the reduced space and subsequently covered by other components. The wire bundle layer 3 is in direct contact with the tunnel wall during operation; its highly elastic steel wires can undergo slight deformation according to the irregularities of the tunnel wall surface, thereby achieving a sealing effect. The upper bending plate assembly 4 not only enhances the stability of the overall device but also provides additional protection due to its longest length, preventing the intrusion of external gravel or silt.

[0036] The advantages of this utility model are that the technical solution optimizes the length of the base plate, lower bending plate, steel wire bundle layer and upper bending plate assembly to form a multi-level stepped structure, which effectively reduces the space occupied by the overall device and enables it to adapt to the installation requirements of narrow environments.

[0037] By shortening the length of the lower bending piece and reducing the turning radius, it can be installed smoothly in space-constrained conditions and cover other components in sequence, thus solving the installation difficulties caused by space reduction in the prior art.

[0038] By setting up a superimposed structure of left inner protective plate, right inner protective plate and outer front protective plate, the stability and protection performance of the overall device are enhanced.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A shield tail brush device for use in confined environments, comprising a base plate (1), a lower bending plate (2), a wire bundle layer (3), an upper bending plate assembly (4), and a cover plate (5), characterized in that: The length of the lower bending piece (2) is shorter than the length of the wire bundle layer (3), and the length of the wire bundle layer (3) is shorter than the length of the upper bending piece assembly (4), thereby forming a multi-level stepped structure.

2. The shield tail brush device for confined environments according to claim 1, characterized in that: The bottom plate (1) is located at the bottom layer and is provided with several positioning holes; the lower bending piece (2) is located above the bottom plate (1) and is raised to the side facing away from the bottom plate (1); the steel wire bundle layer (3) is located above the lower bending piece (2); the upper bending piece assembly (4) is located above the steel wire bundle layer (3); and the cover plate (5) is located at the top layer and is fixedly connected to the bottom plate (1) by bolts.

3. A shield tail brush device for confined environments according to claim 1, characterized in that: The upper bending piece assembly (4) includes a left inner protective piece (6), a right inner protective piece (7), and an outer front protective piece (8).

4. A shield tail brush device for confined environments according to claim 3, characterized in that: The left inner protective plate (6) and the right inner protective plate (7) are arranged alternately on the left and right sides, with their ends overlapping each other. The outer front protective plate (8) is located between the left inner protective plate (6) and the right inner protective plate (7).

5. A shield tail brush device for confined environments according to claim 1, characterized in that: The upward angle of the lower bending piece (2) is 10° to 50°.

6. A shield tail brush device for confined environments according to claim 1, characterized in that: The wire bundle layer (3) is composed of several highly elastic steel wires.

7. A shield tail brush device for confined environments according to claim 1, characterized in that: The top of the cover plate (5) is provided with several through holes, which correspond to the positioning holes on the bottom plate (1). High-strength bolts are used to pass through the through holes and cooperate with the positioning holes.

8. A shield tail brush device for confined environments according to claim 1, characterized in that: The length of the base plate (1) is shorter than the length of the lower bending piece (2).

9. A shield tail brush device for confined environments according to claim 1, characterized in that: A spring plate (9) is also provided below the lower bending piece (2).

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