A shield tunnel segment hoisting tool

Abstract

The utility model relates to the technical field of shield machine construction tools, more specifically, is a shield machine segment hoisting tool. Including hoisting crossbeam, install the hoisting arm of hoisting crossbeam both ends and connect the hoisting claw under hoisting arm both ends, the both ends of hoisting crossbeam are provided with the lifting lug, hoisting crossbeam is the groove shape structure of opening downward, the both ends of hoisting crossbeam are provided with end cover, the inner chamber of hoisting crossbeam is provided with horizontal shaft, both ends of horizontal shaft are installed on end cover through bearing, the middle segment of horizontal shaft is connected with the transmission of the drive arrangement installed on the outer wall of hoisting crossbeam through worm and worm gear mechanism, be provided with screw section on horizontal shaft, the sliding block of screw section is sleeved through thread cooperation, the upper end of hoisting arm is fixedly connected on sliding block, the outer wall of sliding block and hoisting crossbeam inner wall sliding fit. The hoisting tool simple and reasonable in structure has automatic grabbing and automatic locking function, is favorable for improving the work efficiency and safety performance of shield machine segment hoisting.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel boring machine (TBM) construction tools, and more specifically, to a TBM segment hoisting tool. Background Technology

[0002] Tunnel boring machine (TBM) segments are the main assembly components in TBM construction, typically an arc-shaped plate structure. TBM segments stockpiled at the material yard need to be lifted by crane onto specialized transport vehicles and transported to the construction site. Traditional wire rope binding and lifting methods are inefficient and unsafe; while cage lifting offers higher safety, it requires manual loading and unloading, resulting in similarly low efficiency. Chinese patent application number 2023114093532, publication number CN117262990A, discloses "A TBM Segment Lifting Support Device," which includes a support frame and a connecting plate. Connecting ropes are attached to the surface of the support frame, and lifting rings are movably connected to the surface of the connecting plate. A control mechanism includes a connecting chamber fixedly connected to the bottom end of the connecting plate, and a level sensor fixedly connected to the upper surface of the support frame. This invention achieves control over the length of the connecting rope through the winding connection of the rotating wheel and the connecting rope, thereby adjusting the angle of the support frame. With the connection of the level sensor and the support frame, the levelness of the support frame is detected, achieving angle control for segment hoisting. Through the sliding connection of the telescopic rod and telescopic cylinder, and the action of the support spring, the angle between the connecting plate and the support frame is adjusted, improving hoisting performance and ease of assembly. However, this hoisting support device has a complex structure and lacks automatic gripping function, still requiring manual loading during use. It can only be used for short-distance hoisting during segment transport inside the tunnel boring machine before segment assembly. Utility Model Content

[0003] The purpose of this utility model is to provide a shield tunneling machine segment hoisting tool with a simple and reasonable structure and automatic gripping function, so as to improve the working efficiency and safety performance of shield tunneling machine segment hoisting.

[0004] The technical solution adopted by this utility model to solve the technical problem is:

[0005] The shield tunnel segment hoisting tool of this utility model includes a hoisting beam, hoisting arms installed at both ends of the hoisting beam, and hoisting claws connected to the lower ends of the hoisting arms. The hoisting beam has lifting lugs at both ends and is a downward-opening groove-shaped structure. End caps are provided at both ends of the hoisting beam. A horizontal shaft is installed in the inner cavity of the hoisting beam. Both ends of the horizontal shaft are mounted on the end caps via bearings. The middle section of the horizontal shaft is connected to a drive device installed on the outer wall of the hoisting beam via a worm gear mechanism. A screw section is provided on the horizontal shaft, and a slider is threadedly fitted onto the screw section. The upper end of the hoisting arm is fixedly connected to the slider, and the outer wall of the slider slides against the inner wall of the hoisting beam.

[0006] This solution provides a simple and reasonable lifting tool with automatic grabbing and locking functions, which helps improve the efficiency and safety of tunnel segment lifting.

[0007] Preferably, the worm gear mechanism includes a worm wheel fixedly mounted on a horizontal shaft and a worm fixedly connected to the output end of the drive device and meshing with the worm wheel. The worm passes through the lifting beam and is supported on the side wall of the lifting beam by bearings.

[0008] With this solution, the worm gear mechanism drives the horizontal shaft to rotate and locks the horizontal shaft through the self-locking performance of the worm gear mechanism, thereby locking the position of the slider.

[0009] Preferably, the lifting claw is an arc-shaped plate fixedly connected to the lower end of the lifting arm, and the axis of the lifting arm is perpendicular to the plate surface of the lifting claw.

[0010] With this solution, the lifting claw can hook onto the edge of the tunnel segment.

[0011] Preferably, the two screw segments with opposite helical directions are symmetrically arranged on both sides of the worm gear mechanism, and the two sliders are symmetrically arranged and respectively mounted on the two screw segments.

[0012] This solution enables the worm gear mechanism to drive two sliders to move in opposite directions to grab or release segments.

[0013] Due to the adoption of the above structure, the hoisting tool has a simple and reasonable structure, and has automatic grabbing and automatic locking functions, which is conducive to improving the working efficiency and safety performance of tunnel segment hoisting. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0015] Figure 1This is a schematic diagram of the usage state structure of one embodiment of the present invention.

[0016] Figure 2 yes Figure 1 A schematic diagram of the AA cross-sectional structure.

[0017] Figure 3 yes Figure 1 Schematic diagram of the BB cross-section structure. Detailed Implementation

[0018] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0019] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0020] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0022] like Figure 1 , Figure 2 As shown, the shield tunnel segment hoisting tool of this utility model includes a hoisting beam 1, hoisting arms 2 installed at both ends of the hoisting beam 1, and hoisting claws 3 connected to the lower ends of the hoisting arms 2. Lifting lugs 12 are provided at both ends of the hoisting beam 1. In use, the hoisting beam 1 is horizontally positioned and connected to the crane wire rope through the lifting lugs 12 at both ends. The hoisting beam 1 is a downward-opening groove-shaped structure, welded from steel plates, or a channel steel of appropriate length can be directly cut as the hoisting beam 1. End caps 11 are provided at both ends of the hoisting beam 1. A horizontal shaft 4 is provided in the inner cavity of the hoisting beam 1. The two ends of the horizontal shaft 4 are mounted on the end caps 11 through bearings. A bearing mounting hole is provided in the middle of the end cap 11, and a bearing is embedded in the bearing mounting hole. The end of the horizontal shaft 4 is inserted into the inner ring surface of the bearing, allowing it to rotate without obstruction. The middle section of the horizontal shaft 4 is connected to the drive device 5 installed on the outer wall of the hoisting beam 1 through a worm gear mechanism. The drive device 5 can be an ordinary motor or a motor assembly with a reduction gear. The drive device 5 drives the horizontal shaft 4 to rotate through the worm gear mechanism. At the same time, due to the characteristics of the worm gear mechanism itself, once it stops running, it can lock the horizontal shaft 4 to prevent the horizontal shaft 4 from rotating out of control due to external force.

[0023] A screw section 41 is provided on the horizontal shaft 4. The outer wall of the screw section 41 has external threads. A slider 21 is threadedly fitted onto the screw section 41. When the horizontal shaft 4 rotates, the slider 21 moves axially along the screw section 41. The length of the screw section 41 satisfies the maximum stroke of the slider 21, which depends on the width of the tunnel segment to be hoisted and the length of the hoisting claw 3. To prevent the slider 21 from exceeding its limit position, limiting blocks can be provided at both ends of the screw section 41. These limiting blocks can be fixed to the horizontal shaft 4 or to corresponding positions on the inner wall of the hoisting beam 1. Limiting the stroke of the slider 21 with limiting blocks is a conventional technique in this field and will not be described in detail here. The upper end of the hoisting arm 2 is fixedly connected to the slider 21. The hoisting arm 2 is a rectangular square steel or a steel plate of a certain thickness, and its lower end is welded with the hoisting claw 3. The lifting claw 3 is an arc-shaped plate fixedly connected to the lower end of the lifting arm 2. The curvature of the arc-shaped plate is approximately the same as the curvature of the tunnel segment to be lifted, allowing it to fit well against the inner wall of the tunnel segment. The outer end face of the lifting claw 3 is welded to the inner side of the lifting arm 2, and the two are connected at a right angle, making the axis of the lifting arm 2 perpendicular to the plate surface of the lifting claw 3. The outer wall of the slider 21 slides in engagement with the inner wall of the lifting beam 1. In this embodiment, the width of the slider 21 is approximately equal to the width of the inner cavity of the lifting beam 1, so that the two side walls of the lifting beam 1 constrain the slider 21. The slider 21 can move axially within the inner cavity of the lifting beam 1 without flipping over with the rotation of the horizontal axis 4.

[0024] As a further improvement of this utility model, two screw segments 41 with opposite helical directions are symmetrically arranged on both sides of the worm gear mechanism, and two sliders 21 are symmetrically arranged and respectively mounted on the two screw segments 41. When the horizontal axis 4 rotates, the two sliders 21 drive the lifting claws 3 to move inward or outward simultaneously. When the two lifting claws 3 move inward simultaneously, the distance between them gradually decreases, allowing them to be inserted under the tunnel segment from both sides and clamped at the end face of the segment by the inner side of the lifting arm 2, thus grasping the segment; conversely, when the two lifting claws 3 move outward simultaneously, the distance between them gradually increases, allowing them to be removed from under the segment, thus releasing the segment.

[0025] like Figure 1 , Figure 2 , Figure 3As shown, the worm gear mechanism includes a worm wheel 6 fixedly mounted on a horizontal shaft 4 and a worm 7 fixedly connected to the output end of the drive device 5 and meshing with the worm wheel 6. The horizontal shaft 4 passes through the center of the worm wheel 6 and the two are fixedly connected together by interference fit or welding. Alternatively, in another embodiment of this invention, an external spline can be provided in the middle section of the horizontal shaft 4, and a mounting hole can be provided in the center of the worm wheel 6. An internal spline can be provided in the mounting hole, and the worm wheel 6 and the horizontal shaft 4 can be fixedly connected together by the interference fit between the internal and external splines, ensuring that the worm wheel 6 drives the horizontal shaft 4 to rotate synchronously when it rotates. The worm 7 can be positioned above or below the worm wheel 6 as shown in this embodiment. The worm 7 passes through the lifting beam 1 and is supported on the side wall of the lifting beam 1 by bearings. One end of the worm 7 extends out of the side wall of the lifting beam 1 and is connected to the drive device 5.

[0026] like Figure 1 , Figure 2 As shown, during use, the lifting beam 1 is connected to the crane wire rope 8 via the lifting lugs 12 at both ends. For the tunnel boring machine segment 9 stacked on the ground, after determining its length, the drive device 5 is activated to drive the horizontal shaft 4 to rotate, causing the slider 21 to move outward until the minimum distance between the two lifting claws 3 is greater than the length of the tunnel boring machine segment 9. The lifting tool is then lowered so that the height of the lifting claws 3 is slightly lower than the tunnel boring machine segment 9, and the horizontal position of the lifting claws 3 is located on the central axis of the tunnel boring machine segment 9. Subsequently, the drive device 5 drives the horizontal shaft 4 to rotate in the opposite direction, causing the slider 21 to move inward. The two lifting claws 3 move inward simultaneously and insert under the tunnel boring machine segment 9 until the inner wall of the lifting arm 2 clamps the end face of the tunnel boring machine segment 9. At this time, the two sets of lifting claws 3, together with the lifting arm 2, have firmly clamped the tunnel boring machine segment 9, and the tunnel boring machine segment 9 can be lifted to the required position. After the tunnel segment 9 is hoisted into place, the drive unit 5 is activated again to rotate the horizontal shaft 4, which will release the tunnel segment 9. This will not be described again here.

[0027] While specific embodiments of the present invention have been described in detail above, those skilled in the art should understand that these examples are for illustrative purposes only and not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A tunnel boring machine segment hoisting tool, comprising a hoisting beam (1), hoisting arms (2) installed at both ends of the hoisting beam (1), and hoisting claws (3) connected to the lower ends of the hoisting arms (2), wherein lifting lugs (12) are provided at both ends of the hoisting beam (1), characterized in that The lifting beam (1) is a groove-shaped structure with an opening facing downwards. End caps (11) are provided at both ends of the lifting beam (1). A horizontal shaft (4) is provided in the inner cavity of the lifting beam (1). The two ends of the horizontal shaft (4) are mounted on the end caps (11) through bearings. The middle section of the horizontal shaft (4) is connected to the drive device (5) installed on the outer wall of the lifting beam (1) through a worm gear mechanism. A screw section (41) is provided on the horizontal shaft (4). A slider (21) is fitted on the screw section (41) through a threaded fit. The upper end of the lifting arm (2) is fixedly connected to the slider (21). The outer wall of the slider (21) slides with the inner wall of the lifting beam (1).

2. The tunnel segment hoisting tool for a tunnel boring machine according to claim 1, characterized in that, The worm gear mechanism includes a worm wheel (6) fixedly mounted on a horizontal shaft (4) and a worm (7) fixedly connected to the output end of the drive device (5) and meshing with the worm wheel (6). The worm (7) passes through the hoisting beam (1) and is supported on the side wall of the hoisting beam (1) by bearings.

3. The tunnel segment hoisting tool for a tunnel boring machine according to claim 1 or 2, characterized in that, The lifting claw (3) is an arc-shaped plate fixedly connected to the lower end of the lifting arm (2), and the axis of the lifting arm (2) is perpendicular to the plate surface of the lifting claw (3).

4. A tunnel boring machine segment hoisting tool according to claim 1 or 2, characterized in that, Two screw segments (41) with opposite helical directions are symmetrically arranged on both sides of the worm gear mechanism, and two sliders (21) are symmetrically arranged and respectively mounted on the two screw segments (41).

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