Shield tail brush device for narrow environment

Abstract

The invention relates to the technical field of shield tunneling machines, in particular to a shield tail brush device for a narrow environment. The invention discloses a multi-stage ladder-shaped structure which comprises a bottom plate, a lower bending piece, a steel wire bundle layer, an upper bending piece assembly and a cover plate, the length of the lower bending piece is smaller than that of the steel wire bundle layer, and the length of the steel wire bundle layer is smaller than that of the upper bending piece assembly, so that the multi-stage ladder-shaped structure is formed. The beneficial effects are that according to the technical scheme, the lengths of the bottom plate, the lower bending sheet, the steel wire bundle layer and the upper bending sheet assembly are optimally designed to form a multi-stage ladder-shaped structure, so that the occupied space of the whole device is effectively reduced, and the device can adapt to the installation requirement of a narrow environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield machines, and particularly relates to a shield tail brush device for narrow environments. BACKGROUND

[0002] With the development of shield machine technology, the shield tail brush, as an important part of the sealing system of the shield machine, plays a key role in preventing groundwater and silt from seeping into the tunnel interior. However, in the prior art, there is a lack of real-time monitoring means for the stress conditions that the shield tail brush is subjected to during actual operation, which makes it impossible to timely grasp its wear, deformation or failure state, thereby affecting the safety and efficiency of shield construction.

[0003] At present, during the use of the shield machine, the normal size shield tail brush deforms due to the entry of gravel or semi-solid oil stains during use, thereby requiring replacement of the shield tail brush at the corresponding position. However, the original placement of the normal size shield tail brush is small due to the semi-solid oil stains or extrusion, so that the normal shield tail brush cannot be installed or the sealing effect is not good.

[0004] After searching, a shield tail sealing brush and shield tail sealing structure with patent number CN108868792B are disclosed, and the patent application publication date is February 27, 2024. This scheme sets up front, middle and rear elastic sheets, and clamps sealing blocks between adjacent elastic sheets to form a multi-layer sealing structure, which improves the sealing performance and durability, and is suitable for different burial depths and pressure environments. However, this structure has certain limitations when facing narrow spaces: the structure formed by the combination of multiple elastic sheets and sealing blocks is relatively complex and bulky, which is difficult to adapt to the situation of limited space caused by local extrusion or foreign matter intrusion, resulting in difficult installation or reduced sealing performance.

[0005] In addition, a shield machine and its shield tail sealing brush with patent number CN113944471B are also searched, and the authorization announcement date is January 19, 2024. This invention adopts a design combining steel wire brushes with front and rear protective brushes, in which the protective brushes are alternately stacked by support plates, partition plates and integral plates, which enhances the elasticity and adhesion, thereby improving the sealing effect. However, this structure also has the problems of large volume and high rigidity, which makes it difficult to achieve effective installation and sealing in the case of limited space in the shield tail brush installation area due to geological changes or equipment wear, limiting its application in narrow environments.

[0006] The above problems show that the existing shield tail brush device generally has problems such as mismatching of structure size, difficulty in installation, and decline in sealing performance when facing narrow installation environments caused by complex geological conditions, limited space, or local deformation, and is difficult to meet the actual needs of modern shield engineering for high-adaptability sealing systems. Therefore, the present application provides a shield tail brush device for narrow environments to overcome these deficiencies and provide a more compact, flexible, and highly adaptable new solution. SUMMARY

[0007] The purpose of the present application is to provide a shield tail brush device for narrow environments to overcome the above-mentioned deficiencies of the prior art.

[0008] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: A shield tail brush device for narrow environments, comprising a bottom plate, a lower bending piece, a steel wire bundle layer, an upper bending piece assembly, and a cover plate, characterized in that the length of the lower bending piece is shorter than the length of the steel wire bundle layer, and the length of the steel wire bundle layer is shorter than the length of the upper bending piece assembly, thereby forming a multi-stage stepped structure.

[0009] Preferably, the bottom plate is located at the bottommost layer and is provided with a plurality of positioning holes; the lower bending piece is arranged above the bottom plate and is raised towards the side away from the bottom plate; the steel wire bundle layer is arranged above the lower bending piece; the upper bending piece assembly is arranged above the steel wire bundle layer, and the cover plate is located at the uppermost layer and is fixedly connected to the bottom plate by bolts.

[0010] Preferably, the upper bending piece assembly comprises a left inner protection piece, a right inner protection piece, and an outer front protection piece.

[0011] Preferably, the left inner protection piece and the right inner protection piece are arranged alternately left and right, respectively, and the end portions of the two are overlapped with each other, and the outer front protection piece is located between the left inner protection piece and the right inner protection piece.

[0012] Preferably, the angle of the lower bending piece is 10° to 50°.

[0013] Preferably, the steel wire bundle layer is composed of a plurality of high-elasticity steel wires.

[0014] Preferably, the top of the cover plate is provided with a plurality of through holes corresponding to the positioning holes on the bottom plate, and the through holes are penetrated by high-strength bolts and matched with the positioning holes.

[0015] Preferably, the length of the bottom plate is shorter than the length of the lower bending piece.

[0016] Preferably, a spring plate is further arranged below the lower bending plate.

[0017] The beneficial effects of the present application are: the technical scheme optimizes the length of the bottom plate, the lower bending piece, the steel wire bundle layer and the upper bending piece assembly, forms a multi-stage stepped structure, effectively reduces the occupied space of the overall device, and can adapt to the installation requirements of narrow environment; By shortening the length of the lower bending piece, the turning radius is reduced, which can be smoothly installed in the case of limited space, and other components are covered in turn, solving the installation difficulty problem caused by the reduction of space in the prior art; By setting the overlapping structure of the left inner protection piece, the right inner protection piece and the outer front protection piece, the stability and protection performance of the overall device are enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure of the shield tail brush device for narrow environment of the present application is shown in the figure; Figure 2 The equipment rack surface structure of the shield tail brush device for narrow environment of the present application is shown in the figure; Figure 3 The mechanical hand module of the shield tail brush device for narrow environment of the present application is shown in the figure; Figure 4 The suction unit cross section of the shield tail brush device for narrow environment of the present application is shown in the figure; In the figure: 1, bottom plate; 2, lower bending piece; 3, steel wire bundle layer; 4, upper bending piece assembly; 5, cover plate; 6, left inner protection piece; 7, right inner protection piece; 8, outer front protection piece; 9, spring plate. DETAILED DESCRIPTION

[0019] REFERENCE Figures 1 to 4 A shield tail brush device for narrow environment, comprising a bottom plate 1, a lower bending piece 2, a steel wire bundle layer 3, an upper bending piece assembly 4 and a cover plate 5; The bottom plate 1 is located at the bottom layer of the entire shield tail brush, used for bearing other components and providing basic support; the lower bending plate 2 is arranged above the bottom plate 1, which is tilted up towards the side away from the bottom plate 1, forming a certain curvature to adapt to the actual working requirements of the shield tail brush; the steel wire bundle layer 3 is arranged above the lower bending plate 2, which is the core working part of the shield tail brush, used for contacting the tunnel wall and realizing the sealing function; the upper bending plate assembly 4 is arranged above the steel brush group 3, which is also tilted up towards the side away from the bottom plate 2.

[0020] The bottom plate 1 is located at the bottom layer of the entire shield tail brush device, and it directly contacts the installation position of the shield tunneling machine as the closest part. The bottom of the bottom plate 1 is provided with a plurality of positioning holes, which are used to fix the bottom plate on the installation part of the shield tunneling machine through bolts or other fasteners. The length of the bottom plate 1 is designed to be the shortest part in the entire device, and different lengths of the bottom plate 1 can be replaced according to actual needs to adapt to different installation environments. In actual application, the bottom plate 1 provides a stable foundation for the entire shield tail brush device and ensures that other components can be stacked one after another above it.

[0021] The upturned angle of the lower bending piece 2 is designed to be 10° to 50°, and this angle is designed to enable the lower bending piece 2 to better adapt to the requirement that the shield tail brush needs to fit the tunnel wall in actual work. The length of the lower bending piece 2 is slightly longer than that of the bottom plate 1, but it still remains relatively short compared to other components, and this length difference constitutes the first level of the multi-level stepped structure. The main function of the lower bending piece 2 is to provide flexibility in adapting space during device installation, especially in the case of limited space, and its turning radius can effectively avoid interference with obstacles.

[0022] The steel wire bundle layer 3 is arranged above the lower bending piece 2, and its length is longer than that of the lower bending piece 2, constituting the second level of the multi-level stepped structure. The steel wire bundle layer 3 is composed of a plurality of high-elasticity steel wires, and the spacing between the steel wires is 1mm to 3mm, and the thickness is 5mm to 10mm. The steel wire material of the steel wire bundle layer 3 is selected to be high-elasticity and wear-resistant alloy steel to ensure its sealing performance and deformation ability under complex geological conditions. The main function of the steel wire bundle layer 3 is to serve as the core working part of the shield tail brush, directly contacting the tunnel wall and achieving sealing effect, and its special steel wire spacing design allows a certain deformation ability, thereby adapting to the irregularity of the tunnel wall surface. In addition, since the steel wire bundle layer 3 is composed of a plurality of groups of steel wires, it can form a multi-level stepped shape, i.e., the side close to the lower bending piece 2 has the shortest length, and the length gradually increases in steps; The upper bending piece assembly 2 includes a left inner protection plate 6, a right inner protection plate 7, and an outer front protection plate 8. The left inner protection plate 6 and the right inner protection plate 7 are arranged alternately left and right, and the end portions of the two are overlapped with each other to form a complete protection structure, and the outer front protection plate 8 is located in front of the left inner protection plate 6 and the right inner protection plate 7 and is placed between the two, which serves to further enhance the stability and protection of the structure.

[0023] The cover plate 5 is located at the uppermost layer of the whole shield tail brush device, and a plurality of through holes are arranged at the top of the cover plate 5 and correspond to the positioning holes on the bottom plate 1. The cover plate 5 is penetrated through the through holes and matched with the positioning holes on the bottom plate 1 by high-strength bolts, so that all the components are tightly stacked together, and the stability of the whole structure is ensured. The diameter of the high-strength bolt is 6mm to 10mm, so as to provide sufficient fixing strength. The material of the cover plate 5 is selected from high-strength steel, so as to bear the external pressure in the construction process.

[0024] A spring plate 9 is further arranged below the lower bending plate 2, and the spring plate 9 is used for assisting the reset through the elastic force.

[0025] Reference Figure 3 In the actual construction process, the installation sequence of the shield tail brush device is that the bottom plate 1 is fixed on the installation position of the shield tunneling machine through bolts, then the lower bending sheet 2, the steel wire bundle layer 3 and the upper bending sheet assembly 4 are sequentially stacked, and finally all the components are fixed as a whole through the cover plate 5. In a narrow environment, the lower bending sheet 2 can be smoothly accommodated into the reduced space and sequentially covered by other components due to the small turning radius caused by the short length and moderate angle of the lower bending sheet 2. The steel wire bundle layer 3 is in direct contact with the tunnel wall during work, and the high-elasticity steel wire can be slightly deformed along the irregularity of the tunnel wall surface, so that the sealing effect is realized. The upper bending sheet assembly 4 not only enhances the stability of the whole device, but also provides an additional protection effect due to the longest length, so as to prevent the invasion of external gravel or silt.

[0026] The beneficial effects of the present application are that the length of the bottom plate, the lower bending sheet, the steel wire bundle layer and the upper bending sheet assembly is optimized to form a multi-stage ladder-shaped structure, so that the occupied space of the whole device is effectively reduced, and the installation demand in a narrow environment can be met. The length of the lower bending sheet is shortened, and the turning radius is reduced, so that the lower bending sheet can be smoothly installed in the case of limited space and sequentially cover other components, and the installation difficulty problem caused by the reduction of space in the prior art is solved. The overlapping structure of the left inner protection sheet, the right inner protection sheet and the outer front protection sheet is arranged, so that the stability and protection performance of the whole device are enhanced.

[0027] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

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 tilt 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 plate (2).

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