Split type steel arch mounting mechanism for TBM (tunnel boring machine)

Abstract

The utility model discloses a split type steel arch mounting mechanism for a TBM (tunnel boring machine). The split type steel arch mounting mechanism comprises a shield body panel, winches, roller assemblies, traction ropes, a working platform, auxiliary supporting frames and supporting frame assemblies, wherein the winches are symmetrically mounted; through split type layout and modular design, a main beam and a walking track are omitted, the axial length is shortened, and occupied space is optimized; and the bracket assembly adopts a linkage structure of a telescopic oil cylinder and a clamping jaw, so that the mounting precision and the deformation resistance of the steel arch are improved. The utility model is suitable for the rapid support of hard rock tunnel, and has the advantages of simple structure, convenient maintenance and strong adaptability.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering machinery technology, specifically to a split steel arch frame installation mechanism for a full-face hard rock tunnel boring machine (TBM). Background Technology

[0002] Full-face hard rock tunnel boring machines (TBMs) are core equipment in tunnel construction, used for excavation, support, and muck removal in hard rock tunnels. In the initial support phase of the tunnel, the installation of the annular steel arch frame requires a steel arch frame installation mechanism. Existing steel arch frame installation mechanisms are mostly integral structures, relying on a main beam or traveling rail to achieve functions such as lifting, rotating, and positioning of the steel arch frame. However, such structures have the following drawbacks: large space occupation: the integral design limits the minimum turning radius of the TBM, affecting construction flexibility; complex structure: high manufacturing cost, difficult daily maintenance and repair; poor deformation resistance: prone to integral structural deformation or fracture in accidents such as rock bursts and arch collapses. Therefore, there is an urgent need for a steel arch frame installation mechanism that occupies less space, has a simplified structure, and strong deformation resistance. Utility Model Content

[0003] To address the problems of large space occupation, complex structure, and insufficient deformation resistance of existing integral steel arch frame installation mechanisms, this utility model provides a split steel arch frame installation mechanism for TBMs.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a split-type steel arch frame installation mechanism for a TBM, including a shield panel as the installation base; a first winch and a second winch symmetrically installed at a lower position slightly below the center of the circumference of the shield panel; ten sets of roller assemblies symmetrically distributed on the circumference of the shield panel; a traction rope led out from the first winch, passes through the ten sets of roller assemblies in sequence, and connects to the second winch to form a closed-loop traction path; a working platform is fixed to the right side of the shield panel; two sets of auxiliary supports symmetrically installed at the lower center of the circumference of the shield panel; and six sets of support assemblies symmetrically distributed on the circumference of the shield panel.

[0006] The first winch and the second winch achieve counterclockwise traction and clockwise reset of the traction rope (4) through a synchronous control system.

[0007] Furthermore, the closed-loop path of the traction rope is defined as a circumferential track by the roller assembly, which includes a guide wheel and a limiting groove to constrain the movement trajectory of the traction rope and ensure its stable operation along the preset path.

[0008] Furthermore, the work platform is a foldable structure, connected to the shield panel via hinges, and the platform surface is equipped with anti-slip textures and safety railings to improve the safety and convenience of operation for workers.

[0009] Furthermore, the auxiliary support frame includes a hydraulic cylinder and an adjustable support leg. The telescopic end of the hydraulic cylinder is hinged to a limiting block for temporary fixing and posture adjustment of the steel arch frame, ensuring the stability of the steel arch frame during installation.

[0010] Furthermore, the support frame assembly is an integral structure, including a support frame base plate, a telescopic hydraulic cylinder, and a telescopic claw. The inner arc surface of the telescopic claw matches the outer contour of the steel arch frame, and its surface is provided with a wear-resistant coating.

[0011] Furthermore, the steel arch frame is installed segment by segment using traction ropes, specifically including the following steps: A single steel arch frame is hooked onto the traction rope via a lifting lug; the second winch retracts and the first winch releases the traction rope, driving the steel arch frame to move counterclockwise along the circumferential track of the roller assembly; the limiting block of the auxiliary support frame and the telescopic claw of the support assembly work together to support and position the steel arch frame; after the steel arch frame moves to the target position, the operator fixes it on the work platform using bolts or welding, and releases the hook of the traction rope; subsequently, the first winch retracts and the second winch releases the traction rope, restoring the traction path to its initial state, repeating the above steps until five steel arch frames form a ring; finally, the telescopic cylinders of the six sets of support assemblies extend synchronously, pushing the telescopic claws to tighten the ring of steel arch frames against the tunnel wall, completing the support.

[0012] The beneficial effects of this utility model through the above technical solution are:

[0013] This invention provides a split-type steel arch frame installation mechanism for TBMs. By directly mounting the steel arch frame installation mechanism onto the shield body, the main beam and traveling track required in traditional integral arch frame installation mechanisms are eliminated, thus significantly shortening the axial length of the installation mechanism. This design effectively solves the problem of the large space occupation of integral steel arch frame installation mechanisms, while significantly reducing the limitation on the minimum turning radius of the tunneling machine. Furthermore, through optimized structural design, this invention effectively prevents the risk of deformation or breakage of the steel arch frame installation mechanism due to adverse geological conditions (such as rock bursts, arch collapse, etc.), significantly improving the stability and reliability of the equipment.

[0014] This utility model also significantly simplifies the system structure and reduces manufacturing costs by modularizing key components such as winches, rollers and supports. At the same time, it facilitates daily maintenance and repair of the equipment, solving the industry pain points of complex structure and difficult maintenance of traditional integral arch frame installation mechanisms. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 A schematic diagram of the structure of the support assembly (7);

[0017] Figure 3 This is a schematic diagram of the steel arch frame traction and positioning process;

[0018] Figure 4 This is a schematic diagram showing the state of the five steel arch frames after they are formed into a ring.

[0019] Figure 5 A schematic diagram of the support assembly (7) for tightening the steel arch frame.

[0020] In the diagram: 1-Shield body panel, 2-First winch, 3-Roller assembly, 4-Traction rope, 5-Working platform, 6-Auxiliary support frame, 7-Support frame assembly, 701-Support frame base plate, 702-Telescopic cylinder, 703-Telescopic claw, 8-Second winch. Detailed Implementation

[0021] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] To facilitate understanding of the embodiments of the present invention, the relevant technologies are first described. In the prior art, steel arch frame installation mechanisms mostly adopt an integral structure, whose technical characteristics and defects are as follows: the integral structure relies on the main beam or traveling track as the installation base, resulting in excessive axial length, large space occupation, and severely limiting the minimum turning radius of the tunneling machine; the movement of the steel arch frame depends on the longitudinal movement and radial contraction of the integral frame, resulting in high hydraulic pipeline integration, complex structure, and increased manufacturing costs by 30%-40%, and fault repair requires disassembling the integral frame, taking up to 8-12 hours; the integral structure is prone to frame deformation or even breakage during rock bursts or arch collapses, leading to a decrease in the installation accuracy of the steel arch frame, requiring machine shutdown for repair, and affecting the continuity of construction; the traction path is fixed and cannot be adjusted, failing to adapt to changes in tunnel curvature; the support mechanism lacks real-time feedback, relying on manual adjustment, which is inefficient and poses safety hazards. Therefore, there is an urgent need for a steel arch frame installation mechanism that occupies less space, has a simplified structure, and strong resistance to deformation. Based on this, this application provides a split-type steel arch frame installation mechanism for TBMs.

[0023] like Figures 1-5 As shown, a split steel arch frame installation mechanism for a TBM includes: a shield panel 1, a first winch 2 and a second winch 8 symmetrically fixed on the shield panel 1, ten sets of roller assemblies 3 distributed along the circumference of the shield panel 1, a traction rope 4 connecting the first winch 2 and the second winch 8, a working platform 5 located on the right side of the shield panel 1, two sets of symmetrically distributed auxiliary supports 6, and six sets of symmetrically distributed support assemblies 7.

[0024] The first winch 2 and the second winch 8 are connected by a synchronous control system to achieve counterclockwise traction and clockwise reset of the traction rope 4.

[0025] In this embodiment, the support assembly 7 includes: a support base plate 701, a telescopic cylinder 702, and a telescopic claw 703; the two ends of the telescopic cylinder 702 are respectively hinged to the support base plate 701 and the telescopic claw 703, and the support base plate 701 is welded and fixed to the shield panel 1.

[0026] Specifically, the first winch 2 and the second winch 8 are symmetrically arranged at the lower center of the circumference of the shield panel 1, and the distance between them is adjusted according to the length of the steel arch frame; the ten sets of roller assemblies 3 are evenly distributed along the upper center of the circumference of the shield panel 1, and the installation angle of each set of roller assemblies 3 matches the closed path of the traction rope 4; the traction rope 4 is led out by the first winch 2, passes through the guide groove of the ten sets of roller assemblies 3 in sequence, and is connected to the second winch 8 to form a closed-loop motion track.

[0027] In this embodiment, the auxiliary support frame 6 is symmetrically distributed in the lower part of the circumference of the shield panel 1, and the inner arc surface of its limiting plate is in contact with the outer edge of the steel arch frame to provide lateral constraint when the steel arch frame rotates; the working platform 5 is fixed to the right side of the shield panel 1, and the edge of the platform is equipped with a guardrail for workers to stand and operate.

[0028] Specifically, the axis of the telescopic cylinder 702 of the support assembly 7 is consistent with the radial direction of the shield body, and the inner arc surface of the telescopic claw 703 is adapted to the outer arc of the steel arch frame; the six sets of support assemblies 7 are symmetrically distributed on both sides of the shield body panel 1, and the radial tensioning and resetting of the ring steel arch frame is realized by synchronously controlling the telescopic cylinder 702.

[0029] In this embodiment, the steel arch frame installation process includes the following steps:

[0030] S1. Hook the lifting lug of the single steel arch frame to the traction rope 4, start the second winch 8 to retract the traction rope 4, and at the same time, the first winch 2 releases the traction rope 4. The traction rope 4 moves counterclockwise along the roller assembly 3, driving the steel arch frame to rotate.

[0031] S2. During the rotation of the steel arch frame, its outer edge contacts the limiting plate of the auxiliary support 6 and the telescopic claw 703 of the support assembly 7 in sequence. The auxiliary support 6 provides lateral limiting and the support assembly 7 provides radial support.

[0032] S3. When the steel arch frame rotates to the predetermined position, the operator connects the steel arch frame to the adjacent steel arch frame on the work platform 5 with bolts, and then releases the hook between the lifting lug and the traction rope 4.

[0033] S4. The first winch 2 retracts the traction rope 4, and the second winch 8 releases the traction rope 4, so that the traction rope 4 returns to its initial position.

[0034] S5. Repeat the above steps to install five steel arch frames in sequence and connect them into a ring;

[0035] S6 and the telescopic cylinders 702 of the six sets of support assemblies 7 extend synchronously, pushing the telescopic claws 703 to tighten the ring steel arch frame to the tunnel wall, thus completing the support.

[0036] In this embodiment, the reset and cyclic operation is as follows: after the single-ring steel arch support is completed, the telescopic cylinder 702 retracts, and the traction rope 4 is driven clockwise by two winches to reset; the installation angle of the roller assembly 3 is adjusted to adapt to different tunnel curvatures to ensure that the movement path of the traction rope 4 is always in contact with the roller groove.

[0037] Specifically, the surface of the work platform 5 is provided with an anti-slip coating and is equipped with an emergency braking button; if the traction rope 4 deviates, the position of the steel arch frame can be manually corrected through the auxiliary support 6.

[0038] In this embodiment, the modular design of the support assembly 7 allows each component to be disassembled and repaired independently, reducing maintenance costs; the split layout avoids deformation of the overall structure due to rock bursts or collapses, improving its resistance to accidents.

[0039] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. All equivalent substitutions or improvements made in accordance with the technical solutions described in the claims of this utility model should be included within the scope of protection of this utility model.

Claims

1. A split steel arch installation mechanism for a TBM, characterized by, It includes: Shield body panel (1) as installation base; First winch (2) and second winch (8) are symmetrically installed in the lower part of the circumference of the shield body panel (1); Ten groups of roller assembly (3) are symmetrically distributed on the shield body panel (1); The traction rope (4) is drawn out by the first winch (2), sequentially passes through the ten groups of roller assembly (3), and is connected to the second winch (8), forming a closed loop traction path; The working platform (5) is fixed to the right side of the shield body panel (1); Two groups of auxiliary support frame (6) are symmetrically installed in the lower part of the circumference of the shield body panel (1); Six groups of support assembly (7) are symmetrically distributed on the circumference of the shield body panel (1), the support assembly (7) includes support base plate (701), telescopic oil cylinder (702) and telescopic jaw (703), the telescopic oil cylinder (702) is connected with the support base plate (701) and the telescopic jaw (703) at both ends, used for supporting the steel arch. Wherein, the first winch (2) and the second winch (8) realize the counterclockwise traction and the clockwise reset of the traction rope (4) through the synchronous control system.

2. The split steel arch installation mechanism for a TBM of claim 1, wherein, The closed loop path of the traction rope (4) is defined as a circumferential track by the roller assembly (3), which includes a guide wheel and a limiting groove for restricting the movement track of the traction rope (4).

3. The split arched steel jacking mechanism for a TBM of claim 1, wherein, The working platform (5) is a foldable structure connected with the shield body panel (1) through a hinge, and the platform surface is provided with anti-skid lines and safety guardrails.

4. The split arched steel jacking mechanism for a TBM of claim 1, wherein, The auxiliary support frame (6) includes a hydraulic cylinder and an adjusting foot, and the telescopic end of the hydraulic cylinder is hinged with a limiting block for temporary fixing and posture adjustment of the steel arch.

5. The split arched steel jacking mechanism for a TBM of claim 1, wherein, The support assembly (7) is an integral structure, including support base plate (701), telescopic oil cylinder (702) and telescopic jaw (703), the inner arc surface of the telescopic jaw (703) matches the outer contour of the steel arch, and the surface is provided with a wear-resistant coating.

6. The split arched steel jacking mechanism for a TBM of claim 1, wherein, The steel arch is installed in sections by the traction rope (4), and the auxiliary support frame (6) and the support assembly (7) are used for supporting and positioning and supporting and fixing, the telescopic oil cylinder (702) of the support assembly (7) is synchronously extended, the telescopic jaw (703) is pushed to support the ring steel arch to the wall, and the support is completed.

Images