Device for preventing the pipe jacking machine body from twisting when entering a hole

Abstract

The application discloses a device for preventing torsion of a machine body of a pipe jacking machine, and belongs to the technical field of underground engineering pipe jacking construction. The device comprises two symmetrical anti-torsion split mechanisms arranged on the left and right sides of the machine body of the pipe jacking machine. The anti-torsion split mechanism comprises an upper shaft force transmission assembly, a lower shaft force transmission assembly, an anti-torsion rope assembly and a sliding trolley. The upper shaft force transmission assembly is installed on the machine body of the pipe jacking machine, and the lower shaft force transmission assembly is installed on a guide rail chassis of the pipe jacking machine. The two ends of the anti-torsion rope assembly are respectively slidably connected with the upper shaft force transmission assembly and the lower shaft force transmission assembly, and are movably arranged along the axial direction of the machine body. The sliding trolley is connected with the anti-torsion rope assembly and is provided with wheels in contact with the machine body. The application can effectively prevent torsion or derailment of the machine body when the machine body turns or swings to cut the hole door support pile at the beginning of pipe jacking construction, so as to avoid safety accidents.

Description

Technical Field

[0001] This invention relates to the field of underground engineering pipe jacking construction technology, specifically to a device for preventing the pipe jacking machine body from twisting when entering the tunnel. Background Technology

[0002] Pipe jacking is an underground pipeline construction method that developed after shield tunneling. Compared with shield tunneling, it has unique advantages in the construction of small-diameter tunnels, underground pipelines, integrated utility tunnels, and old city renovation in urban centers, and its development space is getting bigger and bigger. Mechanical pipe jacking technology is also becoming more and more mature, and the construction pipe diameter is developing towards large diameter and ultra-large diameter, showing a trend of replacing small shield tunnels.

[0003] Pipe jacking is a complex engineering project involving multiple stages and various factors, and very few projects proceed smoothly throughout the entire process. Based on past pipe jacking experiences, when the pipe jacking machine enters the tunnel portal, the rotation or swing of the cutterhead exerts a torque on the portal support piles (soil), while the portal support piles simultaneously exert a reaction force on the cutterhead. Currently, many pipe jacking machines lack anti-torsion devices. For example, Chinese patent application CN119860239A discloses an automatic pipe jacking machine for pipe jacking construction. This machine effectively avoids equipment displacement or damage caused by sudden geological changes through an intelligent monitoring and early warning system, significantly reducing construction risks and ensuring operational safety and efficiency. However, this device lacks an anti-torsion device. When the friction between the machine body and the guide rails of the pipe jacking platform is low, the reaction force of the portal support piles can easily cause the machine body to twist, potentially leading to derailment and a safety accident.

[0004] Therefore, developing a device to prevent the fuselage from twisting when the fuselage rotates or swings to cut the portal support piles has become an urgent problem to be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a device for preventing the body of a pipe jacking machine from twisting when entering the tunnel, in order to solve the problem that the body of the existing pipe jacking machine is subjected to the reaction force of the tunnel portal support pile when its cutterhead rotates or swings to cut the portal support pile. The reaction force will cause the body to twist, which may lead to derailment and safety accidents in severe cases.

[0006] The technical solution adopted by this invention to solve its technical problem is: a device for preventing twisting of the pipe jacking machine body during tunnel entry, comprising two anti-twist split mechanisms symmetrically arranged on the left and right sides of the pipe jacking machine body. The anti-twist split mechanism includes an upper shaft force transmission assembly, a lower shaft force transmission assembly, an anti-twist rope assembly, and a sliding carriage. The upper shaft force transmission assembly is installed on the pipe jacking machine body, and the lower shaft force transmission assembly is installed on the guide rail base frame of the pipe jacking machine. The two ends of the anti-twist rope assembly are slidably connected to the upper shaft force transmission assembly and the lower shaft force transmission assembly, and are movable relative to the machine body along the axial direction of the machine body. The sliding carriage is connected to the anti-twist rope assembly and has wheels that contact the machine body.

[0007] Furthermore, the upper shaft force transmission assembly has an upper force transmission shaft and an upper sliding sleeve structure that slides on the upper force transmission shaft, and the lower shaft force transmission assembly has a lower force transmission shaft and a lower sliding sleeve structure that slides on the lower force transmission shaft. The axes of the upper force transmission shaft and the lower force transmission shaft are both parallel to the axis of the machine body; the anti-twist rope assembly connects the upper sliding sleeve structure and the lower sliding sleeve structure.

[0008] Furthermore, the upper force transmission shaft is detachably mounted on the machine body, and the lower force transmission shaft is detachably mounted on the guide rail base frame.

[0009] Furthermore, both ends of the upward force shaft are connected to the machine body via two upper fixed seats, and both ends of the upward force shaft pass through the two upper fixed seats respectively. The upward force shaft is provided with an upper lifting lug structure for convenient hoisting and handling of the upward force shaft and an upper pin for preventing the upward force shaft from detaching from the machine body. The upper lifting lug structure is located at one end of the upward force shaft, and the upper pin is positioned adjacent to the upper lifting lug structure. The upper pin and the upper lifting lug structure are respectively located on both sides of one of the upper fixed seats. Both ends of the downward force shaft are connected to the guide rail base frame via two lower fixed seats, and both ends of the downward force shaft pass through the two lower fixed seats respectively. The downward force shaft is provided with a lower lifting lug structure for convenient hoisting and handling of the downward force shaft and a lower pin for preventing the downward force shaft from detaching from the guide rail base frame. The lower lifting lug structure is located at one end of the downward force shaft, and the lower pin is positioned adjacent to the lower lifting lug structure. The lower pin and the lower lifting lug structure are respectively located at both ends of one of the lower fixed seats.

[0010] Furthermore, the upper sliding sleeve structure includes at least two upper bearings connected sequentially along the axial direction of the force transmission shaft; the upper sliding sleeve structure has annular upper support plates on both sides, and the anti-twist rope assembly is sleeved on the upper sliding sleeve structure and located between the two upper support plates.

[0011] Furthermore, the sliding sleeve structure includes at least two lower bearings connected sequentially along the axial direction of the lower force transmission shaft; the sliding sleeve structure has annular lower support plates on both sides, and the anti-twist rope assembly is sleeved on the sliding sleeve structure and located between the two lower support plates.

[0012] Furthermore, the anti-twist rope assembly includes an upper main force rope that is slidably connected to the upper shaft force transmission assembly, a lower adjusting rope that is slidably connected to the lower shaft force transmission assembly, and a tension adjustment structure that connects the upper main force rope and the lower adjusting rope.

[0013] Furthermore, the sliding vehicle includes a frame, wheels mounted on the frame, and a rope-blocking mechanism mounted on the frame. A guide groove for the anti-twist rope assembly is located at the middle of the frame, with the opening of the guide groove facing away from the machine body. The rope-blocking mechanism includes two screw assemblies and a baffle. The two screw assemblies are symmetrically arranged on both sides of the guide groove. Each screw assembly includes a fixing cap fixed to the frame, a screw connecting the fixing cap, a nut threaded to the screw, and a spring sleeved on the screw. The nut is located on the side of the fixing cap away from the frame, and the spring is located between the fixing cap and the nut. The baffle faces the opening of the guide groove, and both ends of the baffle are respectively sleeved on the two screws and located between the spring and the fixing cap.

[0014] Furthermore, the vehicle frame is frog-shaped, including a first main shaft and a second main shaft. There are two first main shafts, which are located on both sides of the guide groove and are mirror images of each other. The first main shaft is bow-shaped, including a bow tip, two bow abutments, and two bow ferrules. The two bow abutments are perpendicularly connected to the two ends of the bow tip, and the two bow ferrules are perpendicularly connected to the two bow abutments. The bow ferrules are located on the side of the bow tip away from the guide groove and extend away from the bow abutments. The wheels are mounted on each bow ferrule. The two ends of the second main shaft are respectively connected to the bow tips of the two first main shafts. The guide groove is located on the second main shaft and is arc-shaped to match the anti-twist rope assembly.

[0015] Furthermore, the baffle is provided with a through hole and a U-shaped opening at both ends, and the screws of the two screw assemblies pass through the through hole and the U-shaped opening respectively.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention employs two anti-torsion split mechanisms located on the left and right sides of the machine body. Each anti-torsion split mechanism includes an upper shaft force transmission component mounted on the machine body, a lower shaft force transmission component mounted on a guide rail base, and an anti-torsion rope component. The two ends of the anti-torsion rope component are respectively connected to the upper and lower shaft force transmission components and are slidably positioned relative to the machine body along its axial direction. This allows the two anti-torsion split mechanisms to symmetrically pull the machine body along a direction perpendicular to its axis without affecting the machine body's pushing action. When the jacking machine body twists, the resulting torque is directly transmitted to the guide rail base through the anti-torsion split mechanisms on both sides of the machine body, and then further transmitted to the concrete at the bottom of the working shaft, thus achieving an anti-torsion effect. Therefore, this invention effectively prevents safety accidents caused by twisting or derailment of the machine body during the initial stage of pipe jacking construction when the cutterhead rotates or swings while cutting the portal support piles. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a device for preventing twisting of the body of a pipe jacking machine during tunnel entry, as shown in an embodiment of the present invention, installed on the pipe jacking machine. Figure 2 This is a three-dimensional structural schematic diagram of the upper shaft force transmission component shown in an embodiment of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the lower shaft force transmission component shown in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the upper sliding sleeve structure shown in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the sliding sleeve structure shown in an embodiment of the present invention; Figure 6 This is a top view of the sliding vehicle shown in an embodiment of the present invention; Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure obtained by viewing the sliding trolley along line AA; Figure 8 This is a top view of the baffle structure shown in an embodiment of the present invention.

[0018] Explanation of the reference numerals in the figure: 10. Machine body; 20. Guide rail base frame; 30. Upper shaft force transmission assembly; 31. Upper fixed seat; 32. Upper force transmission shaft; 33. Upper lifting lug structure; 34. Upper pin; 35. Upper sliding sleeve structure; 351. Upper bearing; 352. Upper support plate; 40. Lower shaft force transmission assembly; 41. Lower fixed seat; 42. Lower force transmission shaft; 43. Lower lifting lug structure; 44. Lower pin; 45. Lower sliding sleeve structure; 451. Lower bearing; 452. Lower support plate; 50. Anti-twist rope assembly; 51. Upper main rope; 52. Lower adjusting rope; 53. Tension adjustment structure; 60. Sliding carriage; 61. First main shaft; 611. Bow saddle; 612. Bow awl; 613. Bow tip; 62. Second main shaft; 621. Guide groove; 63. Wheel; 64. Rope blocking mechanism; 65. Screw assembly; 651. Fixing cap; 652. Screw; 653. Nut; 654. Washer; 655. Spring; 66. Baffle; 661. Perforation; 662. U-shaped opening. Detailed Implementation

[0019] To make the technical problems, solutions, and advantages of this invention clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a locking connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Reference Figures 1 to 8 This invention provides a device for preventing twisting of the pipe jacking machine body during tunnel entry. The device includes two symmetrically arranged anti-twist split mechanisms on the left and right sides of the pipe jacking machine body. Each anti-twist split mechanism includes an upper shaft force transmission assembly 30, a lower shaft force transmission assembly 40, an anti-twist rope assembly 50, and a sliding carriage 60. The upper shaft force transmission assembly 30 is mounted on the pipe jacking machine body 10, and the lower shaft force transmission assembly 40 is mounted on the guide rail base 20 of the pipe jacking machine. The two ends of the anti-twist rope assembly 50 are slidably connected to the upper shaft force transmission assembly 30 and the lower shaft force transmission assembly 40, respectively, and are positioned relative to the machine body 10 along the axial direction of the machine body 10. The device is movable so that the anti-twist rope assembly 50 does not affect the pipe-jacking movement of the machine body 10. The sliding carriage 60 is connected to the anti-twist rope assembly 50 and has wheels 63 that contact the machine body 10. The sliding carriage 60 can prevent the anti-twist rope assembly 50 from directly contacting the machine body 10. In addition, the sliding carriage 60 is connected to the machine body 10 through the wheels 63, so that the sliding carriage can move along the axis of the machine body 10 together with the anti-twist rope assembly 50. Moreover, the friction generated on the machine body 10 is very small, and the resistance to the pipe-pushing movement of the machine body 10 is very small, which can ensure that the machine body 10 can smoothly carry out the pipe-jacking operation.

[0023] This invention employs two anti-torsion split mechanisms located on the left and right sides of the machine body 10. Each anti-torsion split mechanism includes an upper shaft force transmission component 30, a lower shaft force transmission component 40, and an anti-torsion rope component 50. The two ends of the anti-torsion rope component 50 are connected to the upper shaft force transmission component 30 and the lower shaft force transmission component 40, respectively, and are slidably positioned relative to the machine body 10 along its axial direction. This allows the two anti-torsion split mechanisms to symmetrically pull the machine body 10 in a direction perpendicular to its axial direction without affecting the pushing movement of the machine body 10. When the jacking machine body 10 twists, the resulting torque is directly transmitted to the guide rail base 20 through the anti-torsion split mechanisms on both sides of the machine body 10, and then further transmitted to the concrete at the bottom of the working shaft via the guide rail base 20, thus achieving an anti-torsion effect. Therefore, this invention effectively prevents safety accidents caused by twisting or derailment of the machine body 10 during the initial stage of pipe jacking construction when the cutterhead rotates or swings to cut the portal support piles.

[0024] In this embodiment, as Figure 1 , Figure 4 and Figure 5 As shown, the upper shaft force transmission assembly 30 has an upper force transmission shaft 32 and an upper sliding sleeve structure 35 that slides on the upper force transmission shaft 32, and the lower shaft force transmission assembly 40 has a lower force transmission shaft 42 and a lower sliding sleeve structure 45 that slides on the lower force transmission shaft 42. The axes of the upper force transmission shaft 32 and the lower force transmission shaft 42 are both parallel to the axis of the machine body 10. The anti-twist rope assembly 50 connects the upper sliding sleeve structure 35 and the lower sliding sleeve structure 45 so that when the machine body 10 moves the jacking pipe, the anti-twist rope assembly 50 can move on the upper force transmission shaft 32 and the lower force transmission shaft 42, so as to achieve the purpose that the anti-twist rope assembly 50 will not affect the movement of the machine body 10.

[0025] In order to allow the upper force shaft 32 and the lower force shaft 42 to be disassembled and installed on the machine body 10, the upper force shaft 32 is detachably installed on the machine body 10, and the lower force shaft 42 is detachably installed on the guide rail base frame 20.

[0026] In this embodiment, the two ends of the uploading force shaft 32 are respectively connected to the machine body 10 through two upper fixing seats 31 (i.e., the original two rear suspension points of the machine body), and the two ends of the uploading force shaft 32 pass through the two upper fixing seats 31 respectively; as Figure 2As shown, the uploading force shaft 32 is provided with an upper lifting lug structure 33 for convenient hoisting and transportation of the uploading force shaft 32, and an upper pin 34 (with a pin hole on the uploading force shaft 32) for preventing the uploading force shaft 32 from detaching from the machine body 10. The upper lifting lug structure 33 is located at one end of the uploading force shaft 32, and the upper pin 34 is located adjacent to the upper lifting lug structure 33. The upper pin 34 and the upper lifting lug structure 33 are respectively located on both sides of one of the upper fixed seats 31. The two ends of the lower force shaft 42 are respectively connected to the guide rail base 20 through two lower fixed seats 41 (i.e., lifting points on the guide rail base 20). The two ends of the lower force shaft 42 pass through the two lower fixed seats 41 respectively. Figure 3 As shown, the lower force transmission shaft 42 is provided with a lower lifting lug structure 43 for facilitating the hoisting and transportation of the lower force transmission shaft 42, and a lower pin 44 (with a pin hole on the lower force transmission shaft 42) for preventing the lower force transmission shaft 42 from detaching from the guide rail base frame 20. The lower lifting lug structure 43 is located at one end of the lower force transmission shaft 42, and the lower pin 44 is located adjacent to the lower lifting lug structure 43. The lower pin 44 and the lower lifting lug structure 43 are respectively located at both ends of one of the lower fixing seats 41.

[0027] In this embodiment, both the upper force shaft 32 and the lower force shaft 42 are steel shafts, preferably A5 steel shafts.

[0028] In this embodiment, as Figure 4 As shown, the upper sliding sleeve structure 35 includes at least two upper bearings 351 connected sequentially along the axial direction of the force transmission shaft 32; annular upper support plates 352 are provided on both sides of the upper sliding sleeve structure 35; the anti-twist rope assembly 50 is sleeved on the upper sliding sleeve structure 35 and located between the two upper support plates 352. The two upper support plates 352 can prevent the anti-twist rope assembly 50 from detaching from the upper sliding sleeve structure 35, thereby fixing the anti-twist rope assembly 50 on the upper sliding sleeve structure 35. In this embodiment, the number of upper bearings 351 is selected as 2-3, and the upper support plates 352 are made of Q345 steel plate material.

[0029] In this embodiment, as Figure 5 As shown, the sliding sleeve structure 45 includes at least two lower bearings 451 connected sequentially along the axial direction of the lower force transmission shaft 42; annular lower support plates 452 are provided on both sides of the sliding sleeve structure 45; the anti-twist rope assembly 50 is sleeved on the sliding sleeve structure 45 and located between the two lower support plates 452. The two lower support plates 452 can prevent the anti-twist rope assembly 50 from detaching from the sliding sleeve structure 45, thereby fixing the anti-twist rope assembly 50 on the sliding sleeve structure 45. In this embodiment, the number of lower bearings 451 is selected as 2-3, and the lower support plates 452 are made of Q345 steel plate material.

[0030] In this embodiment, both the upper bearing 351 and the lower bearing 451 are radial bearings.

[0031] In this embodiment, the upper bearings 351 and the lower bearings 451 are connected by welding.

[0032] In this embodiment, as Figure 1 As shown, the anti-twist rope assembly 50 includes an upper main force rope 51 slidably connected to the upper shaft force transmission assembly 30, a lower adjusting rope 52 slidably connected to the lower shaft force transmission assembly 40, and a tension adjustment structure 53 connecting the upper main force rope 51 and the lower adjusting rope 52. The tension adjustment structure 53 is used to adjust the tension of the entire anti-twist rope assembly 50. During installation, the upper main force rope 51 and the lower adjusting rope 52 are first installed on the upper shaft force transmission assembly 30 and the lower shaft force transmission assembly 40, respectively. Then, the upper main force rope 51 and the lower adjusting rope 52 are connected through the tension adjustment structure 53. Then, the upper main force rope 51 and the lower adjusting rope 52 are stretched taut through the tension adjustment structure 53. At this time, the upper main force rope 51 and the machine body 10 form a tangent point. A mark is made at the tangent point of the upper main force rope 51. After marking, the tension is adjusted by loosening the tension adjustment structure 53. Loosen the entire anti-twist rope assembly 50 by adjusting the tensioning structure 53, and install the trolley at the marked position on the upper main force rope 51; then tighten the entire anti-twist rope assembly 50 by adjusting the tensioning structure 53, and at the same time adjust the position of the trolley 60 to ensure that the trolley 60 is exactly at the tangent point between the upper main force rope 51 and the machine body 10 after the entire anti-twist rope assembly 50 is pre-tightened. After that, continue to pre-tighten the entire anti-twist rope assembly 50 until you can feel that it is taut when you gently shake the anti-twist rope assembly 50 by hand.

[0033] In this embodiment, the tension adjustment structure 53 is a chain hoist.

[0034] In this embodiment, as Figure 6 and Figure 7As shown, the sliding vehicle 60 includes a frame, wheels 63 mounted on the frame, and a rope-blocking mechanism 64 mounted on the frame. A guide groove 621 for the anti-twist rope assembly 50 to pass through is provided at the middle position of the frame, with the opening of the guide groove 621 facing away from the machine body 10. The rope-blocking mechanism 64 includes two screw assemblies 65 and a baffle 66. The two screw assemblies 65 are symmetrically arranged on both sides of the guide groove 621. Each screw assembly 65 includes a fixing cap 651 fixed to the frame and a screw 66 connecting the fixing cap 651. 52. A nut 653 threadedly engaged with the screw 652 and a spring 655 fitted around the screw 652. The nut 653 is located on the side of the fixing cap 651 away from the frame, and the spring 655 is located between the fixing cap 651 and the nut 653. A baffle 66 faces the opening of the guide groove 621. The two ends of the baffle 66 are respectively fitted onto the two screws 652 and are located between the spring 655 and the fixing cap 651. It is used to block the anti-twist rope assembly 50 within the guide groove 621, thereby connecting the anti-twist rope assembly 50 to the sliding cart. Moreover, this structural design of the sliding cart allows it to move on the anti-twist rope assembly 50, enabling the sliding cart to be placed at a position tangent to the machine body 10 and the anti-twist rope assembly 50, making adjustment very convenient.

[0035] In this embodiment, the vehicle frame is frog-shaped, including a first main shaft 61 and a second main shaft 62. There are two first main shafts 61, located on opposite sides of a guide groove 621, mirror-image positioned about the guide groove 621. Each first main shaft 61 is bow-shaped, including a bow handle 611 (the central handhold of the bow, commonly called the bow handle), two bow tips 612 (the slightly curved section between the bow handle and the bow tips, commonly called the bow arms), and two bow tips 613 (the two ends of the bow, commonly called the bow tips). Two bow tips 612 are vertically connected to the two ends of the bow 611, and two bow axles 613 are vertically connected to the two bow axles 612. The bow tips 613 are located on the side of the bow 611 away from the guide groove 621, and the bow tips 613 extend in a direction away from the bow axle 612. The wheels 63 are mounted on each bow tip 613. The two ends of the second main shaft 62 are respectively connected to the bow tips 611 of the two first main shafts 61. The guide groove 621 is provided on the second main shaft 62 and is in the shape of an arc matching the anti-twist rope assembly 50. Preferably, there are at least two second main shafts 62, and correspondingly, there are at least two rope-blocking mechanisms 64. The second main shafts 62 and the rope-blocking mechanisms 64 are arranged in a one-to-one correspondence. In this embodiment, there are two second main shafts 62 and two rope-blocking mechanisms 64.

[0036] In this embodiment, in order to better compress the spring 655, the screw assembly 65 further includes a washer 654, which is disposed between the nut 653 and the spring 655.

[0037] In this embodiment, asFigure 8 As shown, the baffle 66 has a through hole 661 and a U-shaped opening 662 at both ends, and the screws 652 of the two screw assemblies 65 pass through the through hole 661 and the U-shaped opening 662 respectively. This design facilitates the installation and removal of the anti-twist rope assembly 50 on the vehicle frame. When installing the anti-twist rope assembly 50 on the vehicle frame, the end of the baffle 66 with the through hole 661 is used as a fulcrum. By rotating the baffle 66, the end of the baffle 66 with the U-shaped opening 662 can be disengaged from the screw assembly 65 or installed on the screw assembly 65. When the end of the baffle 66 with the U-shaped opening 662 is in the disengaged state, it is convenient to remove the anti-twist rope assembly 50 from the guide groove 621, thus separating the anti-twist rope assembly 50 from the sliding carriage 60. It is also convenient to place the anti-twist rope assembly 50 into the guide groove 621. After placement, the baffle 66 is rotated again, so that the screw 652 of the screw assembly 65 re-enters into the U-shaped opening 662 of the baffle 66. This allows the anti-twist rope assembly 50 to be blocked again in the guide groove 621, completing the connection between the anti-twist rope assembly 50 and the sliding carriage 60.

[0038] In this embodiment, the diameter of the first spindle 61 is Φ22, the distance between the two first spindles 61's ends 611 is 5cm, the diameter of the second spindle 62 is Φ10, the maximum depth of the guide groove 621 is 2cm, and the thickness of the baffle 66 is 5mm. Of course, the dimensions of the above components are not limited to these; in other feasible embodiments, the dimensions of the above components are selected according to actual needs.

[0039] During use, once one-third of the length of the pipe jacking machine has entered the soil, the anti-torsion device described in this embodiment can be removed for subsequent construction.

[0040] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for preventing twisting of the pipe jacking machine body during tunnel entry, characterized in that: The system includes two symmetrically arranged anti-torsion split mechanisms on the left and right sides of the pipe jacking machine body. Each anti-torsion split mechanism includes an upper shaft force transmission assembly, a lower shaft force transmission assembly, an anti-torsion rope assembly, and a sliding carriage. The upper shaft force transmission assembly is mounted on the pipe jacking machine body, and the lower shaft force transmission assembly is mounted on the guide rail base frame of the pipe jacking machine. The two ends of the anti-torsion rope assembly are slidably connected to the upper shaft force transmission assembly and the lower shaft force transmission assembly, respectively, and are movable relative to the machine body along the axial direction of the machine body. The sliding carriage is connected to the anti-torsion rope assembly and has wheels that contact the machine body.

2. The device for preventing twisting of the pipe jacking machine body during tunnel entry according to claim 1, characterized in that: The upper shaft force transmission assembly has an upper force transmission shaft and an upper sliding sleeve structure that slides on the upper force transmission shaft; the lower shaft force transmission assembly has a lower force transmission shaft and a lower sliding sleeve structure that slides on the lower force transmission shaft; the axes of the upper and lower force transmission shafts are both parallel to the axis of the machine body; the anti-twist rope assembly connects the upper sliding sleeve structure and the lower sliding sleeve structure.

3. The device for preventing twisting of the pipe jacking machine body during tunnel entry according to claim 2, characterized in that: The upper force shaft is detachably mounted on the machine body, and the lower force shaft is detachably mounted on the guide rail base frame.

4. The device for preventing twisting of the pipe jacking machine body during tunnel entry according to claim 3, characterized in that: The two ends of the uploading force shaft are connected to the machine body via two upper fixed seats, and the two ends of the uploading force shaft pass through the two upper fixed seats respectively. The uploading force shaft is provided with an upper lifting lug structure for easy hoisting and handling of the uploading force shaft and an upper pin for preventing the uploading force shaft from detaching from the machine body. The upper lifting lug structure is located at one end of the uploading force shaft, and the upper pin is located adjacent to the upper lifting lug structure. The upper pin and the upper lifting lug structure are located on both sides of one of the upper fixed seats respectively. The two ends of the lower transmission force shaft are connected to the guide rail base frame via two lower fixed seats, and the two ends of the lower transmission force shaft pass through the two lower fixed seats respectively. The lower transmission force shaft is provided with a lower lifting lug structure for easy hoisting and handling of the lower transmission force shaft and a lower pin for preventing the lower transmission force shaft from detaching from the guide rail base frame. The lower lifting lug structure is located at one end of the lower transmission force shaft, and the lower pin is located adjacent to the lower lifting lug structure. The lower pin and the lower lifting lug structure are located at both ends of one of the lower fixed seats respectively.

5. The device for preventing twisting of the pipe jacking machine body during tunnel entry according to claim 2, characterized in that: The upper sliding sleeve structure includes at least two upper bearings connected sequentially along the axial direction of the force transmission shaft; the upper sliding sleeve structure has annular upper support plates on both sides, and the anti-twist rope assembly is sleeved on the upper sliding sleeve structure and located between the two upper support plates.

6. The device for preventing twisting of the pipe jacking machine body during tunnel entry according to claim 2, characterized in that: The sliding sleeve structure includes at least two lower bearings connected sequentially along the axial direction of the lower force transmission shaft; the sliding sleeve structure has annular lower support plates on both sides, and the anti-twist rope assembly is sleeved on the sliding sleeve structure and located between the two lower support plates.

7. The device for preventing twisting of the pipe jacking machine body during tunnel entry according to claim 1, characterized in that: The anti-twist rope assembly includes an upper main force rope that can be slidably connected to the upper shaft force transmission assembly, a lower adjusting rope that can be slidably connected to the lower shaft force transmission assembly, and a tension adjustment structure that connects the upper main force rope and the lower adjusting rope.

8. The device for preventing twisting of the pipe jacking machine body during tunnel entry according to claim 1, characterized in that: The sliding vehicle includes a frame, wheels mounted on the frame, and a rope-blocking mechanism mounted on the frame. A guide groove for the anti-twist rope assembly is located at the center of the frame, with the opening of the guide groove facing away from the machine body. The rope-blocking mechanism includes two screw assemblies and a baffle. The two screw assemblies are symmetrically arranged on both sides of the guide groove. Each screw assembly includes a fixing cap fixed to the frame, a screw connecting the fixing cap, a nut threaded to the screw, and a spring fitted around the screw. The nut is located on the side of the fixing cap away from the frame, and the spring is located between the fixing cap and the nut. The baffle faces the opening of the guide groove, and its two ends are respectively fitted onto the two screws and located between the spring and the fixing cap.

9. The device for preventing twisting of the pipe jacking machine body during tunnel entry according to claim 8, characterized in that: The vehicle frame is frog-shaped and includes a first main shaft and a second main shaft. There are two first main shafts, which are located on both sides of the guide groove and are mirror images of each other. The first main shaft is bow-shaped and includes a bow base, two bow abutments, and two bow tips. The two bow abutments are perpendicularly connected to the two ends of the bow base, and the two bow tips are perpendicularly connected to the two bow abutments. The bow tips are located on the side of the bow base away from the guide groove and extend away from the bow abutments. The wheels are mounted on each bow tip. The two ends of the second main shaft are respectively connected to the bow bases of the two first main shafts. The guide groove is located on the second main shaft and is arc-shaped to match the anti-twist rope assembly.

10. The device for preventing twisting of the pipe jacking machine body during tunnel entry according to claim 8, characterized in that: The baffle has a through hole and a U-shaped opening at both ends, and the screws of the two screw assemblies pass through the through hole and the U-shaped opening respectively.

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