Double-shield TBM telescopic hard air pipe

Abstract

The utility model relates to a double-shield TBM telescopic hard air pipe, and belongs to the technical field of double-shield TBMs. The front-end hard air pipe is installed on the main machine, the rear-end hard air pipe is installed on the tackle, the butt-joint hard air pipe is telescopically inserted in the front-end hard air pipe, the tail end of the butt-joint hard air pipe is connected with the rear-end hard air pipe, a gap meeting the requirement for mutual swinging during steering is reserved between the butt-joint hard air pipe and the front-end hard air pipe, and the sealing rubber plate is installed at the front end of the butt-joint hard air pipe. The sealing rubber plate is in contact with the inner wall of the front-end hard air pipe to form sealing; the telescopic requirement of the air guide pipe is met through telescopic sleeving of the front-end hard air pipe and the butt-joint hard air pipe, the problems that the service life of the air guide pipe is affected due to deformation, blockage and vibration of the flexible air pipe are solved, and the problem that the flexible air pipe naturally droops is solved due to the fact that the butt-joint hard air pipe is a hard pipe; the turning requirement of the shield tunneling machine is met through the gap between the butt-joint hard air pipe and the front-end hard air pipe, the butt-joint hard air pipe and the front-end hard air pipe are sealed through the sealing rubber plate, the dust removal effect is guaranteed, and the construction efficiency is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of dual-shield TBM technology, specifically relating to a retractable rigid air duct for dual-shield TBMs. Background Technology

[0002] During the tunneling process, the cutterhead of a TBM generates a large amount of dust as it cuts through the rock, significantly impacting the tunnel construction environment. If this dust is not promptly removed, it can harm the health of workers inside the tunnel and, over time, affect the normal operation of the equipment. Therefore, dust collectors are needed to remove and filter the dust. TBM equipment is typically equipped with dust collectors, which connect to the muck outlet of the conveyor belt via flexible and rigid ducts to extract and treat the dust generated at the excavation face.

[0003] In existing technology, the two ends of the duct are rigid ducts, connecting to the dust collector fan and the slag outlet of the belt conveyor, respectively. The middle section is a flexible duct located at the connection between the main unit and the trolley. The main unit moves the trolley forward via a hydraulic cylinder. When the hydraulic cylinder extends, the flexible duct extends, and the dust collector fan can normally extract dust. However, when the hydraulic cylinder retracts, the distance between the main unit and the trolley decreases, causing the flexible duct to droop naturally. Under the negative pressure generated by the dust collector fan, the flexible duct deforms and folds, blocking the dust collection duct. This results in reduced dust collection efficiency, poor air extraction by the dust collector fan, and severe deformation and vibration of the flexible duct, affecting its service life and the overall construction efficiency of the tunnel boring machine. Summary of the Invention

[0004] To overcome the problems in the prior art where the reduced distance between the main unit and the trolley causes the flexible duct to sag naturally, deforming and folding under the negative pressure of the dust collector fan, thus blocking the dust collection duct, reducing dust collection efficiency, hindering the dust collector fan's airflow, and causing severe deformation and vibration of the flexible duct, affecting its service life and the overall construction efficiency of the tunnel boring machine, this utility model provides a telescopic rigid duct for a double-shield TBM. The telescopic connection between the front rigid duct 1 and the connecting rigid duct 3 satisfies the expansion and contraction requirements of the air guide duct, solving the problems of deformation, blockage, and vibration of the flexible duct, which affect its service life. The connecting rigid duct 3 is a rigid pipe, solving the problem of the flexible duct sags naturally. The gap 5 between the connecting rigid duct 3 and the front rigid duct 1 meets the turning requirements of the tunnel boring machine. The sealing rubber plate 4 forms a seal between the connecting rigid duct 3 and the front rigid duct 1, ensuring dust collection efficiency and effectively improving construction efficiency.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A double-shield TBM retractable rigid air duct mainly includes a front rigid air duct 1, a rear rigid air duct 2, a connecting rigid air duct 3, and a sealing rubber plate 4. The front rigid air duct 1 is installed on the main unit, the rear rigid air duct 2 is installed on the trolley, and the connecting rigid air duct 3 is retractably inserted into the front rigid air duct 1. The end of the connecting rigid air duct 3 is connected to the rear rigid air duct 2. A gap 5 is left between the connecting rigid air duct 3 and the front rigid air duct 1 to allow for mutual swinging during turning. A sealing rubber plate 4 is installed at the front end of the connecting rigid air duct 3, and the sealing rubber plate 4 contacts the inner wall of the front rigid air duct 1 to form a seal.

[0006] Furthermore, the sealing rubber plate 4 is detachably installed on the connecting rigid air duct 3 by bolts.

[0007] Furthermore, the rear rigid air duct 2 and the connecting rigid air duct 3 are connected by flanges and bolts.

[0008] Furthermore, a flexible hose 6 is fitted onto the connecting rigid air duct 3, with both ends of the flexible hose 6 connected to the end of the front rigid air duct 1 and the front end of the rear rigid air duct 2, respectively.

[0009] Furthermore, the sealing rubber plate 4 is a rubber sleeve with an integrally formed flared structure.

[0010] The beneficial effects of this utility model are:

[0011] This invention solves the problems of deformation, blockage, and vibration of flexible air ducts, which affect their service life, by using a telescopic connection between the front-end rigid air duct and the connecting rigid air duct to meet the expansion and contraction requirements of the air guide duct. The connecting rigid air duct is a rigid pipe, which solves the problem of the flexible air duct naturally sagging. The gap between the connecting rigid air duct and the front-end rigid air duct meets the turning requirements of the tunnel boring machine. The sealing rubber plate forms a seal between the connecting rigid air duct and the front-end rigid air duct, ensuring the dust removal effect and effectively improving construction efficiency. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0013] Figure 2 This is a three-dimensional schematic diagram of the present invention.

[0014] Figure 3 This is a three-dimensional schematic diagram of the non-telescopic flexible hose of this utility model. Detailed Implementation

[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0016] This utility model discloses a retractable rigid air duct for a dual-shield TBM. The retractable rigid air duct mainly includes a front rigid air duct 1, a rear rigid air duct 2, a connecting rigid air duct 3, and a sealing rubber plate 4. The front rigid air duct 1 is mounted on the main unit, the rear rigid air duct 2 is mounted on the trolley, and the connecting rigid air duct 3 is retractably inserted into the front rigid air duct 1. The end of the connecting rigid air duct 3 is connected to the rear rigid air duct 2. A gap 5 is provided between the connecting rigid air duct 3 and the front rigid air duct 1 to allow for mutual swinging during turning. A sealant is installed at the front end of the connecting rigid air duct 3. The sealing rubber sheet 4 forms a seal with the inner wall of the front rigid air duct 1. The telescopic connection between the front rigid air duct 1 and the connecting rigid air duct 3 meets the expansion and contraction requirements of the air duct, solving the problems of deformation, blockage, and vibration of the flexible air duct, which affect its service life. The connecting rigid air duct 3 is a rigid pipe, which solves the problem of the flexible air duct naturally sagging. The gap 5 between the connecting rigid air duct 3 and the front rigid air duct 1 meets the turning requirements of the tunnel boring machine. The sealing rubber sheet 4 forms a seal between the connecting rigid air duct 3 and the front rigid air duct 1, ensuring the dust removal effect and effectively improving construction efficiency.

[0017] In this embodiment, the sealing rubber plate 4 is detachably installed on the connecting rigid air duct 3 by bolts, and the sealing rubber plate 4 is easy to disassemble and replace when it is worn.

[0018] In this embodiment, the rear rigid air duct 2 and the connecting rigid air duct 3 are connected by flanges and bolts, and the connecting rigid air duct 3 can be disassembled to facilitate the replacement of the sealing rubber plate 4.

[0019] In this embodiment, a telescopic hose 6 is fitted onto the connecting rigid air duct 3. The two ends of the telescopic hose 6 are respectively connected to the end of the front rigid air duct 1 and the front of the rear rigid air duct 2. The telescopic hose 6 can effectively prevent debris such as soil and gravel from entering the gap 5 between the connecting rigid air duct 3 and the front rigid air duct 1, thus avoiding affecting the relative movement between the connecting rigid air duct 3 and the front rigid air duct 1. The telescopic hose 6 can extend and retract with the front rigid air duct 1. When the telescopic hose 6 retracts, it is supported by the top of the connecting rigid air duct 3, which can prevent the telescopic hose 6 from drooping naturally.

[0020] In this embodiment, the sealing rubber plate 4 is an integrally molded flared rubber sleeve with a good sealing effect and is easy and quick to replace.

[0021] Work process:

[0022] The telescopic connection between the front rigid air duct 1 and the connecting rigid air duct 3 satisfies the expansion and contraction requirements of the air guide duct, solving the problems of deformation, blockage, and vibration of the flexible air duct, which affect its service life. The connecting rigid air duct 3 is a rigid pipe, which solves the problem of the flexible air duct naturally sagging. The gap 5 between the connecting rigid air duct 3 and the front rigid air duct 1 meets the turning requirements of the tunnel boring machine. The sealing rubber plate 4 forms a seal between the connecting rigid air duct 3 and the front rigid air duct 1, ensuring the dust removal effect and effectively improving construction efficiency. The telescopic hose 6 can effectively prevent soil, stone chips and other debris from entering the gap 5 between the connecting rigid air duct 3 and the front rigid air duct 1, avoiding affecting the relative movement of the connecting rigid air duct 3 and the front rigid air duct 1. The telescopic hose 6 can expand and contract with the front rigid air duct 1. When the telescopic hose 6 is retracted, it is supported by the top of the connecting rigid air duct 3, which can prevent the telescopic hose 6 from sagging naturally.

[0023] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A double shield TBM telescopic hard-sluice, characterized in that: The retractable rigid air duct of the dual-shield TBM includes a front rigid air duct (1), a rear rigid air duct (2), a connecting rigid air duct (3), and a sealing rubber plate (4). The front rigid air duct (1) is installed on the main unit, the rear rigid air duct (2) is installed on the trolley, and the connecting rigid air duct (3) is retractably inserted into the front rigid air duct (1). The end of the connecting rigid air duct (3) is connected to the rear rigid air duct (2). A gap (5) is left between the connecting rigid air duct (3) and the front rigid air duct (1) to allow them to swing back and forth when turning. A sealing rubber plate (4) is installed at the front end of the connecting rigid air duct (3). The sealing rubber plate (4) contacts the inner wall of the front rigid air duct (1) to form a seal.

2. A dual shield TBM telescopic hard-sluice as claimed in claim 1, characterized in that: The sealing rubber sheet (4) is detachably installed on the connecting rigid air duct (3) by bolts.

3. A double-shield TBM retractable rigid duct as described in claim 1 or 2, characterized in that: The rear rigid air duct (2) and the connecting rigid air duct (3) are connected by flanges and bolts.

4. A double shield TBM telescopic hard-sluice as claimed in claim 3, characterized in that: The connecting rigid air duct (3) is fitted with a telescopic flexible hose (6), and the two ends of the telescopic flexible hose (6) are respectively connected to the end of the front rigid air duct (1) and the front end of the rear rigid air duct (2).

5. A telescopic hard duct for a double shield TBM according to any one of claims 1, 2, 4, characterized in that: The sealing rubber sheet (4) is a rubber sleeve with an integrally formed flared mouth structure.

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