Hoisting pin fixer for pipe jacking hoisting

Abstract

The utility model is applicable to the technical field of hoisting pins, and provides a hoisting pin fixer for jacking pipe hoisting, which comprises a mounting plate capable of being detachably connected with the side wall of a jacking pipe, a connecting block is fixedly connected with one side surface of the mounting plate, a hoisting rope hole is formed in the surface of the connecting block in a penetrating manner, and a connecting shaft is fixedly connected with the other side surface of the mounting plate. The surface of the connecting shaft is movably sleeved with a lifting pin sleeve matched with the pipe jacking preformed hole, and a counter bore is formed in the other end face of the lifting pin sleeve. According to the hoisting pin fixer for the pipe jacking crane, a plurality of jacking pipes can be repeatedly hoisted into the bottom of a tunnel pit by disassembling the mounting plate and disassembling the hoisting pin sleeves from the interiors of the hoisting pin connectors, and in the long-time hoisting use process, counter bores can be disassembled when the surfaces of the hoisting pin sleeves are abraded to have large errors with the hoisting pin connectors; and therefore, the lifting pin sleeve can be detached from the surface of the connecting shaft, and the lifting pin sleeve can be conveniently and independently replaced.

Description

Technical Field

[0001] This utility model belongs to the field of lifting pin technology, and in particular relates to a lifting pin fixing device for pipe jacking cranes. Background Technology

[0002] A tunnel boring machine (TBM) is a core piece of equipment for tunnel construction. It integrates mechanical, electrical, hydraulic, sensor, and information technologies, and can complete the entire process of tunneling, excavation, and lining underground, earning it the nickname "underground aircraft carrier."

[0003] When a tunnel boring machine (TBM) is working, it needs to be spliced ​​together with several jacking pipes to move the TBM and continuously excavate the tunnel. During the splicing of the jacking pipes, a lifting pin retainer is needed to connect the lifting equipment to the jacking pipe for hoisting. After hoisting to the bottom of the pit, the lifting pin retainer inside the square pipe lifting pin interface needs to be disassembled. During long-term use, the surface of the lifting pin retainer is prone to wear. When the accuracy of the positioning pin and the hole position is mismatched, the force transmission during the hoisting process is uneven, which requires replacing the entire lifting pin retainer. This results in high maintenance costs and is not conducive to hoisting operations. Summary of the Invention

[0004] This utility model provides a lifting pin fixing device for pipe jacking, which aims to solve the problem that when the positioning pin and hole position accuracy match large errors during long-term use of the lifting pin fixing device, the force transmission during the lifting process is uneven, and the entire lifting pin fixing device needs to be replaced.

[0005] This utility model is implemented as follows: a pipe jacking crane uses a lifting pin fixing device, which includes an installation plate that can be detachably connected to the side wall of the pipe jacking. A connecting block is fixedly connected to one side of the installation plate, and a lifting rope hole is opened through the surface of the connecting block. A connecting shaft is fixedly connected to the other side of the installation plate, and a lifting pin sleeve that matches the reserved hole of the pipe jacking is movably sleeved on the surface of the connecting shaft.

[0006] The other end face of the lifting pin sleeve is provided with a countersunk hole, and a disassembly bolt is provided inside the countersunk hole. One end of the disassembly bolt extends into the inner cavity of the lifting pin sleeve, and the other end of the connecting shaft is provided with an internal thread hole that is compatible with the disassembly bolt.

[0007] Preferably, a key is fixedly connected to the side wall of the connecting shaft, and a keyway adapted to the key is provided on the inner wall surface of the hanging pin sleeve.

[0008] Preferably, a sealing ring adapted to the lifting pin sleeve is fixedly connected to one end of the side wall of the connecting shaft.

[0009] Preferably, a plurality of reinforcing ribs are fixedly connected between one side of the mounting plate and the side wall of the connecting block.

[0010] Preferably, the surface of the mounting plate has several through holes, and the interior of each through hole is provided with a connecting bolt that is compatible with the bolt hole of the jacking pipe.

[0011] Preferably, the surface of the suspension sleeve is coated with a tungsten carbide coating.

[0012] Beneficial effects

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a pipe jacking crane using a lifting pin fixing device. After the lifting pin sleeve is fitted onto the surface of the connecting shaft, and the countersunk hole and the internal threaded hole are threaded together, the lifting pin sleeve can be installed on the surface of the connecting shaft for use. After the lifting rope passes through the inside of the lifting rope hole, the lifting pin sleeve is embedded inside the lifting pin interface on the pipe. After being fixed by the mounting plate to the pipe, the pipe can be lifted. After the pipe enters the pit bottom, the mounting plate is removed, and the lifting pin sleeve is removed from the inside of the lifting pin interface. This allows for the repeated lifting of several pipes into the tunnel pit bottom. During long-term lifting use, when the surface of the lifting pin sleeve wears down to a point where the error with the lifting pin interface is large, the countersunk hole can be removed, and the lifting pin sleeve can be removed from the surface of the connecting shaft. This facilitates individual replacement of the lifting pin sleeve, reduces the maintenance cost of the device, and allows for the installation of lifting pin sleeves of different diameters, facilitating connection and fixing with different specifications of lifting pin interfaces, ensuring uniform force transmission, and benefiting the pipe jacking operation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the lifting pin sleeve and sealing ring in this utility model;

[0016] Figure 3 This is a schematic diagram of the disassembly and assembly bolts and countersunk holes in this utility model;

[0017] Figure 4 This is a schematic diagram of the pin and keyway structure in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the lifting pin sleeve and the tungsten carbide coating in this utility model.

[0019] In the diagram: 1. Mounting plate; 2. Connecting block; 3. Lifting rope hole; 4. Reinforcing rib; 5. Through hole; 6. Connecting bolt; 7. Connecting shaft; 8. Lifting pin sleeve; 9. Removal bolt; 10. Countersunk hole; 11. Internal threaded hole; 12. Pin key; 13. Keyway; 14. Sealing ring; 15. Tungsten carbide coating. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Please see Figure 1-3 This utility model provides a technical solution: a lifting pin fixing device for a jacking pipe, including an installation plate 1 that can be detachably connected to the side wall of the jacking pipe, a connecting block 2 that is fixedly connected to one side of the installation plate 1, a lifting rope hole 3 that is opened through the surface of the connecting block 2, a connecting shaft 7 that is fixedly connected to the other side of the installation plate 1, and a lifting pin sleeve 8 that is movably sleeved on the surface of the connecting shaft 7 and adapted to the reserved hole of the jacking pipe.

[0022] The other end face of the lifting pin sleeve 8 is provided with a countersunk hole 10, and a disassembly bolt 9 is provided inside the countersunk hole 10. One end of the disassembly bolt 9 extends into the inner cavity of the lifting pin sleeve 8, and the other end of the connecting shaft 7 is provided with an internal threaded hole 11 that is compatible with the disassembly bolt 9.

[0023] After the lifting pin sleeve 8 is fitted onto the surface of the connecting shaft 7, and the countersunk hole 10 is threadedly connected to the internal threaded hole 11, the lifting pin sleeve 8 can be installed on the surface of the connecting shaft 7 for use. After the lifting rope passes through the inside of the lifting rope hole 3, the lifting pin sleeve 8 is embedded in the lifting pin interface on the jacking pipe. After the mounting plate 1 is connected and fixed to the jacking pipe, the jacking pipe can be lifted.

[0024] After the pipe jacking enters the bottom of the pit, the installation plate 1 is removed, and the lifting pin sleeve 8 is removed from the inside of the lifting pin interface. Then, several pipe jackings can be repeatedly lifted into the bottom of the tunnel pit.

[0025] During long-term lifting use, when the surface of the lifting pin sleeve 8 wears down to the point where there is a large error with the lifting pin interface, the countersunk hole 10 can be removed, and the lifting pin sleeve 8 can be removed from the surface of the connecting shaft 7, making it convenient to replace the lifting pin sleeve 8 separately and reducing the maintenance cost of the device.

[0026] It can install lifting pin sleeves of different diameters, which is convenient for connecting and fixing different specifications of lifting pin interfaces, ensuring the uniformity of force transmission and facilitating the lifting of pipes.

[0027] Furthermore, a key 12 is fixedly connected to the side wall of the connecting shaft 7, and a keyway 13 adapted to the key 12 is opened on the inner wall surface of the hanging pin sleeve 8.

[0028] In this embodiment, when the lifting pin sleeve 8 is installed between the connecting shaft 7, the key 12 is embedded in the keyway 13, which can guide and limit the installation of the lifting pin sleeve 8.

[0029] Furthermore, a sealing ring 14 adapted to the lifting pin sleeve 8 is fixedly connected to one end of the side wall of the connecting shaft 7. The sealing ring 14 facilitates sealing after the lifting pin sleeve 8 is installed, preventing impurities from entering the gap between the connecting shaft 7 and the lifting pin sleeve 8.

[0030] Furthermore, a number of reinforcing ribs 4 are fixedly connected between one side of the mounting plate 1 and the side wall of the connecting block 2, and the reinforcing ribs 4 improve the connection strength between the mounting plate 1 and the connecting block 2.

[0031] Furthermore, the surface of the mounting plate 1 is provided with several through holes 5, and the inside of the through holes 5 is provided with connecting bolts 6 that are compatible with the bolt holes of the jacking pipe. After the connecting bolts 6 are connected to the bolt holes on the jacking pipe, the mounting plate 1 and the jacking pipe can be connected and fixed.

[0032] Furthermore, the surface of the pin sleeve 8 is coated with a tungsten carbide coating 15, which improves the wear resistance of the pin sleeve 8.

[0033] The working principle and usage process of this utility model are as follows: After the utility model is installed, the lifting pin sleeve 8 is fitted onto the surface of the connecting shaft 7. After the countersunk hole 10 is threadedly connected to the internal threaded hole 11, the lifting pin sleeve 8 can be installed on the surface of the connecting shaft 7 for use. After the lifting rope passes through the inside of the lifting rope hole 3, the lifting pin sleeve 8 is embedded in the lifting pin interface on the jacking pipe. After the mounting plate 1 is connected and fixed to the jacking pipe, the jacking pipe can be lifted. After the jacking pipe enters the bottom of the pit, the mounting plate 1 is removed, and the lifting pin sleeve 8 is removed from the inside of the lifting pin interface. Several jacking pipes can be repeatedly lifted into the bottom of the tunnel pit. During long-term lifting and use, when the surface of the lifting pin sleeve 8 is worn to the point that the error with the lifting pin interface is large, the countersunk hole 10 can be removed, and then the lifting pin sleeve 8 can be removed from the surface of the connecting shaft 7 for easy replacement of the lifting pin sleeve 8 individually.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting pin fixing device for a pipe jacking crane, comprising a mounting plate (1) detachably connected to the side wall of the pipe jacking, characterized in that: A connecting block (2) is fixedly connected to one side of the mounting plate (1), and a rope hole (3) is opened through the surface of the connecting block (2). A connecting shaft (7) is fixedly connected to the other side of the mounting plate (1), and a lifting pin sleeve (8) that matches the reserved hole of the jacking pipe is movably sleeved on the surface of the connecting shaft (7). The other end face of the lifting pin sleeve (8) is provided with a countersunk hole (10), and a disassembly bolt (9) is provided inside the countersunk hole (10). One end of the disassembly bolt (9) extends into the inner cavity of the lifting pin sleeve (8), and the other end of the connecting shaft (7) is provided with an internal threaded hole (11) that is compatible with the disassembly bolt (9).

2. The pipe jacking crane using a lifting pin fixing device as described in claim 1, characterized in that: The side wall of the connecting shaft (7) is fixedly connected with a key (12), and the inner wall surface of the hanging pin sleeve (8) is provided with a keyway (13) that matches the key (12).

3. The lifting pin fixing device for pipe jacking as described in claim 1, characterized in that: One end of the side wall of the connecting shaft (7) is fixedly connected to a sealing ring (14) that is compatible with the hanging pin sleeve (8).

4. The lifting pin fixing device for a pipe jacking crane as described in claim 1, characterized in that: A number of reinforcing ribs (4) are fixedly connected between one side of the mounting plate (1) and the side wall of the connecting block (2).

5. A lifting pin fixing device for a pipe jacking crane as described in claim 1, characterized in that: The surface of the mounting plate (1) is provided with several through holes (5), and the inside of the through holes (5) is provided with connecting bolts (6) that are compatible with the bolt holes of the jacking pipe.

6. The lifting pin fixing device for pipe jacking as described in claim 1, characterized in that: The surface of the lifting pin sleeve (8) is coated with a tungsten carbide coating (15).

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