A rear-mounted, retractable slurry pipe jacking machine

Abstract

This utility model discloses a rear-mounted, retractable slurry pipe jacking machine, comprising a cutterhead, a shield, a slurry balancing mechanism, and a power unit. The cutterhead is located at the front end of the shield. The power unit includes a power shaft and a drive mechanism. The drive mechanism is located at the rear of the shield. The power shaft is located within the shield, with its front end connected to the cutterhead and its rear end connected to the drive mechanism. The slurry balancing mechanism is mounted on the power shaft and located within the shield. This utility model externalizes the power unit by placing it at the rear of the device and transmitting power through the power shaft. Because external power is not limited by space, and the transmission path of the power shaft can bear greater power and torque, the overall operating power of the cutterhead is increased by more than two times, making the cutterhead suitable for various complex geological formations.

Description

Technical Field

[0001] This utility model relates to the field of pipe jacking machine technology, specifically to a rear-mounted, retractable slurry pipe jacking machine with a rear-mounted power source. Background Technology

[0002] The trenchless construction technology of slurry balance pipe jacking has significant advantages in avoiding surface structures, reducing surface disturbance, and shortening the construction period, thus it is widely used in densely built-up areas. However, existing slurry balance pipe jacking equipment has several shortcomings in use. Its power system is generally built-in, with the cutterhead drive usually installed in the center of the machine head. Constrained by space and heat dissipation, it cannot be equipped with high-power motors and heavy-duty reducers, thus limiting torque and resulting in insufficient overall cutting ability, making it difficult to traverse complex obstacles such as boulders and concrete. Furthermore, it mainly relies on a closed slurry chamber, maintaining positive pressure balance by adjusting the slurry inlet and outlet system, which suffers from delayed slurry outlet control and low response speed, making it unsuitable for rapidly changing soil conditions and high-risk shallow overburden situations. Moreover, after construction is completed or the machine is stopped due to an obstacle, the equipment is generally dismantled using a receiving well, increasing construction costs and making recovery inconvenient; there is also the drawback of difficulty in adjusting and correcting direction during the jacking process. This utility model provides a rear-mounted, retractable slurry balance pipe jacking machine to solve the above problems. Utility Model Content

[0003] This utility model provides a rear-mounted, retractable slurry pipe jacking machine, which solves the technical problems of insufficient power and inability to adjust slurry balance. It also adopts a modular structure, which effectively improves the efficiency of assembly and disassembly.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: A rear-mounted, retractable slurry pipe jacking machine includes a cutterhead, a shield, a slurry balancing mechanism, and a power unit. The cutterhead is located at the front end of the shield. The power unit includes a power shaft and a drive mechanism. The drive mechanism is located at the rear of the shield. The power shaft is located inside the shield. The front end of the power shaft is connected to the cutterhead, and the rear end is connected to the drive mechanism. The slurry balancing mechanism is located on the power shaft and inside the shield.

[0005] The shield body includes a directional pipe section, a standard pipe section, and a directional cylinder. The directional pipe section is located in front of the standard pipe section and is connected to the standard pipe section through the directional cylinder. The cutterhead is located on the directional pipe section.

[0006] The power shaft includes a drive shaft and radial supports. The radial supports are spaced apart on the drive shaft and are located in the directional pipe section and the standard pipe section, and are in contact with the inner walls of the directional pipe section and the standard pipe section. The front end of the directional cylinder is connected to the radial support located in the directional pipe section, and its rear end is connected to the radial support located in the standard pipe section.

[0007] Furthermore, the radial support includes a bearing mechanism, a support frame, an adjusting support plate, and a telescopic power mechanism. The bearing mechanism is located at the center of the support frame, the transmission shaft is located in the bearing mechanism, the adjusting support plate and the telescopic power mechanism are located in the support frame, the adjusting support plate is located at the outer end of the telescopic power mechanism, and the extension length of the adjusting support plate is adjusted by the telescopic power mechanism.

[0008] Furthermore, the slurry balancing mechanism includes a bearing mechanism, a sealing plate, and a pressure regulating component. The bearing mechanism on the slurry balancing mechanism is located at the center of the sealing plate. The outer periphery of the sealing plate contacts the inner wall of the standard pipe section to seal the standard pipe section. The pressure regulating component is located on the sealing plate and is used to regulate the slurry pressure inside the standard pipe section.

[0009] Furthermore, the pressure regulating assembly includes a slurry discharge pipe, a sealing valve, a sealing plate, and a sealing power mechanism. The slurry discharge pipe is located on the sealing plate and extends through both the front and rear sides of the sealing plate. The sealing valve is located on the rear side of the sealing plate. The rear end of the slurry discharge pipe is located in the sealing valve. The sealing plate is located in the sealing valve and connected to the sealing power mechanism. The sealing plate is used to seal the slurry outlet of the slurry discharge pipe.

[0010] Furthermore, multiple pressure regulating components are provided and are centrally symmetrically arranged on the rear side of the sealing plate.

[0011] Furthermore, the support frame is cross-shaped, and the adjusting support plates are symmetrically arranged on the support frame.

[0012] Furthermore, the cutter head includes a cutting cutter head, a fixed tool, and a reaming tool, wherein the fixed tool and the reaming tool are disposed on the surface of the cutting cutter head.

[0013] Furthermore, the reaming tool includes a reaming head, a mounting base, and a telescopic mechanism. The cutting disc has a reaming groove on its surface, the mounting base is located in the reaming groove, the telescopic mechanism is located on the rear side of the cutting disc and connected to the mounting base, and the reaming head is located on the mounting base.

[0014] Furthermore, the outer diameter of the cutting disc is the same as the inner diameter of the directional pipe section, and the pipe diameter of the directional pipe section is the same as the pipe diameter of the standard pipe section.

[0015] Furthermore, the drive mechanism includes a track frame, a jacking plate, a jacking cylinder, a jacking frame, a reducer, and a rotary drive motor. The shield body is mounted on the track frame, the jacking cylinder is mounted on the jacking frame, the output end of the jacking cylinder is connected to the jacking plate, the jacking plate is connected to the shield body, and the rotary drive motor is mounted on the jacking frame and connected to the power shaft through the reducer.

[0016] The beneficial effects of this utility model are as follows: By placing the power unit at the rear of the device to achieve external power and transmitting power through the power shaft, the external power is not limited by space, and the transmission path of the power shaft can also carry greater power and torque. Therefore, the overall working power of the cutterhead is increased by more than 2 times, making the cutterhead suitable for various complex formations. A slurry balance mechanism is installed in the shield body to actively control the pressure inside the chamber, ensuring the balance between the pressure inside the chamber and the pressure inside the ground, and realizing timely adjustment of the pressure inside the chamber, making it suitable for rapidly changing soil conditions and high-risk shallow overburden conditions, and ensuring operational safety. The shield's directional pipe section and standard pipe section adopt a split structure, which, together with the retractable hole-reaming cutter, enables the shield head to be retracted and recovered, achieving recovery without the need for a receiving well, effectively improving construction efficiency and reducing costs. The shield body can be flexibly and precisely oriented by using a combination of directional pipe sections and standard pipe sections, thereby enabling real-time correction of the jacking posture during tunneling and avoiding the risks caused by accumulated deviations during the tunneling process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the construction status of this utility model; Figure 3 This is a schematic diagram of the power shaft connection state of this utility model; Figure 4 This is a schematic diagram of the cutter head structure of this utility model; Figure 5 This is a schematic diagram showing the configuration of the reaming head of this utility model. Figure 6 This is a schematic diagram of the hole-reaming cutter head structure of this utility model; Figure 7 This is a schematic diagram of the front side of the mud-water balance structure of this utility model; Figure 8 This is a schematic diagram of the rear side of the mud-water balance structure of this utility model; Figure 9 This is a schematic diagram of the internal structure of the mud-water balance of this utility model; Figure 10 This is a schematic diagram showing the configuration of the slurry discharge pipe of this utility model. Figure 11 This is a schematic diagram of the radial support structure of this utility model; Figure 12 This is a schematic diagram of the internal structure of the radial support of this utility model.

[0018] Reference numerals: 1. Cutterhead; 11. Cutting cutterhead; 12. Fixed cutter; 13. Reamer; 131. Reamer head; 132. Mounting base; 133. Telescopic mechanism; 2. Shield body; 21. Orienting pipe section; 22. Standard pipe section; 23. Orienting cylinder; 3. Slurry balance mechanism; 31. Sealing plate; 32. Pressure regulating component; 321. Slurry discharge pipe; 322. Sealing valve; 323. Sealing plate; 324. Sealing power mechanism; 4. Power unit; 41. Power shaft; 411. Transmission shaft; 412. Radial support; 4121. Bearing mechanism; 4122. Support frame; 4123. Adjustable support plate; 4124. Telescopic power mechanism; 42. Drive mechanism. Detailed Implementation

[0019] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0021] like Figure 1 , 2 As shown in Figure 3, a rear-mounted, retractable slurry pipe jacking machine includes a cutterhead 1, a shield 2, a slurry balancing mechanism 3, and a power unit 4. The cutterhead 1 is located at the front end of the shield 2. The power unit 4 includes a power shaft 41 and a drive mechanism 42. The drive mechanism 42 is located at the rear of the shield 2. The power shaft 41 is located inside the shield 2. The front end of the power shaft 41 is connected to the cutterhead 1, and the rear end is connected to the drive mechanism 42. The power of the rear-mounted drive mechanism 42 is transmitted to the cutterhead 1 through the power shaft 41. Because the drive mechanism 42 has a larger installation space, it can provide greater power and torque, thereby improving the cutting ability of the cutterhead 1 and enabling the pipe jacking machine to be used in more complex strata. The slurry balancing mechanism 3 is located on the power shaft 41 and inside the shield 2.

[0022] The slurry balance mechanism 3 of this invention can actively regulate the pressure inside the slurry chamber through active control, ensuring safety during operation. The shield body 2 is set as a combination of directional pipe section 21 and standard pipe section 22. By adjusting the directional pipe section 21, the jacking posture can be corrected during the tunneling process, ensuring operational accuracy. Furthermore, both the directional pipe section 21 and the standard pipe section 22 adopt a split structure. The outer shell can be left in the soil as a jacking pipe, while the inner pipe, cutterhead 1, and power shaft 41 can be withdrawn and recovered from the outer pipe, enabling recovery without the need for a receiving well, effectively reducing costs and improving construction efficiency.

[0023] like Figure 1 , 2 As shown in Figure 3, the shield body 2 further includes a directional pipe section 21, a standard pipe section 22, and a directional hydraulic cylinder 23. The directional pipe section 21 is located in front of the standard pipe section 22. The directional pipe section 21 is connected to the standard pipe section 22 through the directional hydraulic cylinder 23. By extending and retracting the directional hydraulic cylinder 23 at different positions, the direction of the directional pipe section 21 can be adjusted, thereby changing the tunneling direction of the directional pipe section 21 and the cutterhead 1 on it, correcting the tunneling posture, and avoiding the risk of accumulated deviation of the tunneling path. The cutterhead 1 is located on the directional pipe section 21.

[0024] like Figure 1 , 2 As shown in Figure 3, further, the power shaft 41 includes a transmission shaft 411 and a radial support 412. The radial support 412 is spaced apart on the transmission shaft 411, and multiple sets are provided for positioning and adjusting the transmission shaft 411 to ensure that the transmission shaft 411 is always centered and maintains a stable state. The radial support 412 is located in the directional pipe section 21 and the standard pipe section 22 and is in contact with the inner wall of the directional pipe section 21 and the standard pipe section 22. The front end of the directional cylinder 23 is connected to the radial support 412 located in the directional pipe section 21, and its rear end is connected to the radial support 412 located in the standard pipe section 22.

[0025] like Figure 11 , 12 As shown, the radial support 412 further includes a bearing mechanism 4121, a support frame 4122, an adjusting support plate 4123, and a telescopic power mechanism 4124. The bearing mechanism 4121 is located at the center of the support frame 4122, and the transmission shaft 411 is located in the bearing mechanism 4121. The bearing mechanism 4121 is used to realize transmission and sealing functions. The adjusting support plate 4123 and the telescopic power mechanism 4124 are located in the support frame 4122. The adjusting support plate 4123 is located at the outer end of the telescopic power mechanism 4124, and the extension length of the adjusting support plate 4123 is adjusted by the telescopic power mechanism 4124.

[0026] like Figure 11 , 12 As shown, the support frame 4122 is cross-shaped, and the adjusting support plates 4123 are symmetrically arranged on the support frame 4122. Two adjusting support plates 4123 are symmetrically arranged on each support frame 4122 to fix the transmission shaft 411 and adjust the position of the transmission shaft 411, so that the transmission shaft 411 is always in a centered state.

[0027] like Figure 1 , 2 As shown in Figures 3, 7, and 8, the slurry balancing mechanism 3 is further disposed in the standard pipe section 22, including a bearing mechanism 4121, a sealing plate 31, and a pressure regulating component 32. The bearing mechanism 4121 on the slurry balancing mechanism 3 is disposed at the center of the sealing plate 31. The outer periphery of the sealing plate 31 contacts the inner wall of the standard pipe section 22 to seal the standard pipe section 22. The pressure regulating component 32 is disposed on the rear side of the sealing plate 31 and is used to regulate the slurry pressure in the standard pipe section 22.

[0028] like Figure 7 , 8 As shown in Figures 9 and 10, furthermore, four sets of pressure regulating components 32 are provided and are centrally symmetrically arranged on the rear side of the sealing plate 31. The opening and closing control also adopts a centrally symmetrical approach, and the pressure regulating components 32 are synchronously adjusted. Through the centrally symmetrical arrangement and synchronous adjustment, when balancing the slurry pressure, the shield body will not have safety hazards due to pressure differences at different positions of the pressure regulating components 32, thereby ensuring the safety of construction.

[0029] like Figure 7 , 8 As shown in Figures 9 and 10, the pressure regulating assembly 32 further includes a slurry discharge pipe 321, a sealing valve 322, a sealing plate 323, and a sealing power mechanism 324. The slurry discharge pipe 321 is mounted on the sealing plate 31 and is perpendicular to the sealing plate 31. The slurry discharge pipe 321 extends through both the front and rear sides of the sealing plate 31. The sealing valve 322 is located on the rear side of the sealing plate 31. The rear end of the slurry discharge pipe 321 is located in the sealing valve 322. The sealing plate 323 is located in the sealing valve 322 and is connected to the sealing power mechanism 324. The sealing plate 323 is used to seal the slurry outlet of the slurry discharge pipe 321. When the pressure is reduced, the sealing plate 323 increases the opening of the slurry outlet of the slurry discharge pipe 321 under the action of the sealing power mechanism 324. When the pressure is increased, the sealing plate 323 decreases the opening of the slurry outlet of the slurry discharge pipe 321 under the action of the sealing power mechanism 324.

[0030] like Figure 4 , 5As shown, the cutter head 1 further includes a cutting cutter head 11, a fixed cutter 12, and a reaming cutter 13. The fixed cutter 12 and the reaming cutter 13 are disposed on the surface of the cutting cutter head 11. The reaming cutters 13 are arranged in pairs and symmetrically. The outer diameter of the cutter head 1 is the same as the inner diameter of the shield body 2, so that the cutter head 1 is retracted from the shield body 2 when the reaming cutter 13 is retracted. After the reaming cutter 13 is extended, it can perform reaming operations.

[0031] like Figure 4 , 5 As shown in Figure 6, the reaming tool 13 includes a reaming head 131, a mounting base 132, and a telescopic mechanism 133. The cutting disc 11 has a reaming groove on its surface, which is arranged radially along the disc surface. Therefore, when the reaming head 131 extends outward radially along the disc surface, it can achieve reaming when rotated. The mounting base 132 is located in the reaming groove. The telescopic mechanism 133 is located on the rear side of the cutting disc 11 and is connected to the mounting base 132. The reaming head 131 is mounted on the mounting base 132.

[0032] Furthermore, the outer diameter of the cutting disc 11 is the same as the inner diameter of the directional pipe section 21, and the pipe diameter of the directional pipe section 21 is the same as the pipe diameter of the standard pipe section 22. The setting of the pipe diameter enables the retraction of the cutting disc and the inner pipe, which is suitable for overall retraction after construction is completed. Moreover, when the cutting disc malfunctions and needs to be replaced, it can also be replaced by retraction, which saves more costs.

[0033] like Figure 1 As shown, the drive mechanism 42 further includes a track frame, a jacking plate, a jacking cylinder, a jacking frame, a reducer, and a rotary drive motor. The shield body 2 is mounted on the track frame, the jacking cylinder is mounted on the jacking frame, the output end of the jacking cylinder is connected to the jacking plate, the jacking plate is connected to the shield body 2, and the jacking cylinder pushes the jacking plate to push the shield body 2 to achieve jacking. The rotary drive motor is mounted on the jacking frame and is connected to the power shaft 41 through the reducer. The rotary drive motor and the jacking plate move synchronously.

[0034] A method for using a rear-mounted, retractable slurry pipe jacking machine includes the following steps: S1, Equipment Assembly: Lower the cutterhead 1, shield 2, slurry balance mechanism 3 and power unit 4 into the well and assemble them into a whole in sequence; S2, Pipe jacking: Control the pressure regulating component 32 to open the slurry outlet of the slurry pipe 321 to the maximum, and then start the drive mechanism 42 to jack; During the tunneling process, the jacking cylinder pushes the jacking plate and drives the shield 2 to move forward. At the same time, the rotation drive motor starts and transmits power to the power shaft 41 through the reducer. The rotation of the power shaft 41 drives the cutterhead 1 to rotate for cutting and tunneling. The cutting and jacking of the cutterhead 1 are carried out simultaneously to realize the pipe jacking construction. During construction, the tunneling direction is constantly monitored, and the jacking direction is corrected by controlling the directional pipe section 21. At the same time, when hole enlargement is required, the hole enlargement tool 13 is extended to enlarge the hole. S3, Earth pressure regulation: When the slurry pressure in front of the slurry balance mechanism 3 is unbalanced during the tunneling process, the pressure regulation component 32 is controlled to adjust the opening of the slurry outlet of the slurry pipe 321 to balance the slurry pressure in front of the slurry balance mechanism 3. When the slurry chamber pressure is high, the opening of the slurry outlet of the slurry pipe 321 is increased; when the slurry chamber pressure is low, the opening of the slurry outlet of the slurry pipe 321 is decreased. S4, Equipment Recovery: After the jacking construction is completed, control the retracting cutter 13 to retract, first recover and lift out the drive mechanism 42, then pull the power shaft 41 to pull it and the mud-water balance mechanism 3 out of the shield body 2, and at the same time drive the cutter head 1 to withdraw, and then disassemble and lift it out.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A rear-mounted, retractable slurry pipe jacking machine, characterized in that: The shield includes a cutterhead (1), a shield body (2), a mud-water balance mechanism (3), and a power unit (4). The cutterhead (1) is located at the front end of the shield body (2). The power unit (4) includes a power shaft (41) and a drive mechanism (42). The drive mechanism (42) is located at the rear side of the shield body (2). The power shaft (41) is located in the shield body (2). The front end of the power shaft (41) is connected to the cutterhead (1), and the rear end is connected to the drive mechanism (42). The mud-water balance mechanism (3) is located on the power shaft (41) and is located in the shield body (2). The shield body (2) includes a directional pipe section (21), a standard pipe section (22) and a directional cylinder (23). The directional pipe section (21) is located on the front side of the standard pipe section (22) and is connected to the standard pipe section (22) through the directional cylinder (23). The cutter head (1) is located on the directional pipe section (21). The power shaft (41) includes a transmission shaft (411) and a radial support (412). The radial support (412) is spaced on the transmission shaft (411). The radial support (412) is located in the directional pipe section (21) and the standard pipe section (22) and contacts the inner wall of the directional pipe section (21) and the standard pipe section (22). The front end of the directional cylinder (23) is connected to the radial support (412) located in the directional pipe section (21), and its rear end is connected to the radial support (412) located in the standard pipe section (22).

2. The rear-mounted, retractable slurry pipe jacking machine according to claim 1, characterized in that: The radial support (412) includes a bearing mechanism (4121), a support frame (4122), an adjusting support plate (4123), and a telescopic power mechanism (4124). The bearing mechanism (4121) is located at the center of the support frame (4122), and the transmission shaft (411) is located in the bearing mechanism (4121). The adjusting support plate (4123) and the telescopic power mechanism (4124) are located in the support frame (4122). The adjusting support plate (4123) is located at the outer end of the telescopic power mechanism (4124), and the extension length of the adjusting support plate (4123) is adjusted by the telescopic power mechanism (4124).

3. A rear-mounted, retractable slurry pipe jacking machine according to claim 1, characterized in that: The mud-water balance mechanism (3) includes a bearing mechanism (4121), a sealing plate (31), and a pressure regulating component (32). The bearing mechanism (4121) on the mud-water balance mechanism (3) is located at the center of the sealing plate (31). The outer periphery of the sealing plate (31) contacts the inner wall of the standard pipe section (22) to seal the standard pipe section (22). The pressure regulating component (32) is located on the sealing plate (31) and is used to regulate the mud-water pressure in the standard pipe section (22).

4. A rear-mounted, retractable slurry pipe jacking machine according to claim 3, characterized in that: The pressure regulating component (32) includes a slurry discharge pipe (321), a sealing valve (322), a sealing plate (323), and a sealing power mechanism (324). The slurry discharge pipe (321) is located on the sealing plate (31) and passes through the front and rear sides of the sealing plate (31). The sealing valve (322) is located on the rear side of the sealing plate (31). The rear end of the slurry discharge pipe (321) is located in the sealing valve (322). The sealing plate (323) is located in the sealing valve (322) and is connected to the sealing power mechanism (324). The sealing plate (323) is used to seal the slurry outlet of the slurry discharge pipe (321).

5. A rear-mounted, retractable slurry pipe jacking machine according to claim 3, characterized in that: Multiple pressure regulating components (32) are provided and are centrally symmetrically arranged on the rear side of the sealing plate (31).

6. A rear-mounted, retractable slurry pipe jacking machine according to claim 2, characterized in that: The support frame (4122) is cross-shaped, and the adjusting support plate (4123) is symmetrically arranged on the support frame (4122).

7. A rear-mounted, retractable, slurry pipe jacking machine according to claim 1, characterized in that: The cutter head (1) includes a cutting cutter head (11), a fixed cutter (12) and a reaming cutter (13), which are disposed on the surface of the cutting cutter head (11).

8. A rear-mounted, retractable slurry pipe jacking machine according to claim 7, characterized in that: The reaming tool (13) includes a reaming head (131), a mounting base (132), and a telescopic mechanism (133). The cutting disc (11) has a reaming groove on its surface. The mounting base (132) is located in the reaming groove. The telescopic mechanism (133) is located on the rear side of the cutting disc (11) and is connected to the mounting base (132). The reaming head (131) is located on the mounting base (132).

9. A rear-mounted, retractable slurry pipe jacking machine according to claim 7, characterized in that: The outer diameter of the cutting disc (11) is the same as the inner diameter of the directional pipe section (21), and the pipe diameter of the directional pipe section (21) is the same as the pipe diameter of the standard pipe section (22).

10. A rear-mounted, retractable slurry pipe jacking machine according to claim 1, characterized in that: The drive mechanism (42) includes a track frame, a jacking plate, a jacking cylinder, a jacking frame, a reducer, and a rotary drive motor. The shield body (2) is mounted on the track frame, the jacking cylinder is mounted on the jacking frame, the output end of the jacking cylinder is connected to the jacking plate, the jacking plate is connected to the shield body (2), and the rotary drive motor is mounted on the jacking frame and connected to the power shaft (41) through the reducer.

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