A trenchless cable construction jacking pipe

Abstract

The application relates to the technical field of construction pipe jacking, in particular to a trenchless cable construction pipe jacking device, which comprises a backrest block, an oil cylinder frame is installed on the outer wall of the backrest block, a rotating shaft is driven by a first electric control hydraulic cylinder to push a second fixed block to run to one side, so that the second fixed block exerts a pushing force on a sliding guide rail, when a connecting block is inserted into the inner wall of a sliding shell, the connecting block can only slide on the inner wall of the sliding shell, a second electric control hydraulic cylinder is displaced to one side, the sliding guide rail is moved to a set position, and installation is relatively simple; a first hydraulic jacking rod is pressurized to push a second pipeline to move a distance, then one end of a second hydraulic jacking rod drives the first hydraulic jacking rod to contract onto the inner wall of an inner shell, then a double-shaft servo motor drives a wheel hub to rotate, so that the device can move on the inner wall of the pipeline, then a rear relay interval assembly is pressurized to fill the left gap, and the relay interval assembly is sequentially removed for recycling, and the practicability is better.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking technology, specifically to a trenchless cable jacking method. Background Technology

[0002] Trenchless technology refers to the laying, repairing, and replacing of pipelines using geotechnical drilling techniques without excavation or with only a small number of working pits. It is highly efficient, of high quality, moderately cost-effective, and environmentally friendly, offering advantages such as no disruption to traffic and no environmental pollution. In many cases, it has a shorter construction cycle, lower overall cost, and better safety than open-cut methods. It has become a major method in urban municipal construction and is widely used for laying pipelines for gas, electricity, telecommunications, cable television lines, oil, natural gas, heating, and drainage in areas where excavation is not permitted or prohibited, such as crossing highways, railways, buildings, rivers, urban areas, historical sites, and agricultural and vegetation protection zones. Pipe jacking is an underground pipeline construction method developed after shield tunneling. It does not require surface excavation and can cross highways, railways, rivers, surface buildings, underground structures, and various underground pipelines. Pipe jacking construction utilizes the thrust of the main jacking cylinder and intermediate sections between pipelines to propel the tool pipe or excavated pipe. The jacking machine is pushed from the working shaft through the layer of soil to the receiving shaft and then lifted. However, the most prominent feature of existing pipe jacking construction is its adaptability. Different geological conditions, construction conditions, and design requirements necessitate the selection of appropriate pipe jacking methods, the correct choice of jacking machine and supporting equipment, and the subsequent assembly of the jacking components. Assembling the jacking machine in the launch pit is extremely inconvenient, requiring the supporting equipment to be placed into the launch pit sequentially for assembly. This involves numerous construction steps, is time-consuming, and delays the construction progress. Furthermore, in long-distance pipe jacking construction, the distance is too great, resulting in insufficient thrust on the jacking machine at the far end. Therefore, relay stations are needed to supplement thrust. These relay stations can be either retrievable or non-retrievable. However, retrievable relay stations increase construction difficulty by requiring the disassembly of hydraulic cylinders, increasing labor costs. Conversely, non-retrievable relay stations increase material costs. There is no efficient and economical method for retrievable relay stations, and the structure still needs improvement, as detailed below:

[0003] In this scheme, when the trenchless cable jacking construction pipe is used for pipe jacking construction, the supporting equipment for pipe jacking, such as backrest, hydraulic cylinder, guide rail and equalizing ring, can be quickly assembled, which can save construction time. However, the recovery method between the relays is relatively time-consuming and labor-intensive. Therefore, a trenchless cable jacking pipe is needed to improve the above problems. Summary of the Invention

[0004] To address the time-consuming assembly of auxiliary equipment and the high manpower and time costs associated with the recovery of intermediate relays during trenchless cable jacking construction, this invention provides a trenchless cable jacking system to solve these problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A trenchless cable jacking method includes a backrest block, a cylinder frame mounted on the outer wall of the backrest block, an electrically controlled cylinder mounted on the inner wall of the cylinder frame, a guide rail assembly mounted on the outer wall of the backrest block, an equalizing ring mounted at one end of the electrically controlled cylinder, a first pipe mounted on the outer wall of the equalizing ring, a relay assembly mounted at the port of the first pipe, a second pipe mounted at one end of the relay assembly, a jacking machine mounted at one end of the second pipe, a laser theodolite mounted on one side of the cylinder frame and on the outer wall of the backrest block, a sludge pump mounted on the other side of the cylinder frame and on the base surface of the backrest block, and a controller mounted on the outer wall of the sludge pump.

[0007] The guide rail assembly includes a first universal joint and a sliding housing. The first universal joint is mounted on the outer wall of the backrest block. A first fixing block is mounted on one end of the first universal joint. A rotating shaft is mounted on the inner wall of the first fixing block opposite to it. A first electro-hydraulic cylinder is rotatably connected to the outer wall of the rotating shaft. A rotating shaft is mounted on one end of the first electro-hydraulic cylinder. A second fixing block is rotatably connected to the outer wall of the rotating shaft. A second universal joint is mounted on the outer wall of the second fixing block. A sliding guide rail is mounted on one end of the second universal joint. A connecting block is mounted on one end of the sliding guide rail. The sliding housing is mounted on the side wall of the backrest block. A connecting block is slidably connected to the inner wall of the sliding housing. A second electro-hydraulic cylinder is mounted on the side wall of the sliding guide rail.

[0008] The relay assembly includes a housing, which is installed at the port of the first pipeline. A first hydraulic push rod is installed on the inner wall of the housing. A positioning block is installed at one end of the first hydraulic push rod. A ball bearing is embedded in the outer wall of the positioning block. A fixing plate is installed on the outer wall of the first hydraulic push rod. A second hydraulic push rod is installed on the outer wall of the fixing plate. An inner shell is installed at one end of the second hydraulic push rod. A through hole is opened on the outer wall of the inner shell. An mounting plate is installed on one side of the through hole and on the outer wall of the inner shell. An electrically controlled cylinder clamp is installed on the outer wall of the mounting plate. A dual-axis servo motor is installed at one end of the electrically controlled cylinder clamp. The drive shaft of the dual-axis servo motor is connected to a hub. A rubber ring is installed on the outer wall of the hub.

[0009] As a preferred embodiment of the present invention, the controller is connected to an electric hydraulic cylinder, a pipe jacking machine, a laser theodolite, a sludge pump, a first electric hydraulic cylinder, a second electric hydraulic cylinder, a first hydraulic jacking rod, a second hydraulic jacking rod, an electric cylinder clamp, and a dual-axis servo motor via wires, and the connection method is electrical connection. The cross-section of the backrest block is an L-shaped structure.

[0010] As a preferred embodiment of the present invention, the cylinder frame is provided in two sets and is located on the outer wall of the backrest block respectively; the electrically controlled cylinder is provided in multiple sets and is located on the outer wall of the backrest block respectively; the laser theodolite is facing the through hole; the sludge pump is connected to the pipe jacking machine through a conduit; and the first universal joint is provided in two sets and is located on the outer wall of the backrest block respectively.

[0011] As a preferred embodiment of the present invention, the first fixed block and the rotating shaft are connected by a rotatable connection, the first electro-hydraulic cylinder and the rotating shaft are connected by a rotatable connection, the sliding guide rail is located directly below the first pipe and is connected by a sliding connection, and the sliding guide rail is located directly below the outer casing and is connected by a sliding connection.

[0012] As a preferred embodiment of the present invention, the cross-section of the connecting block is F-shaped, the sliding housing is provided in two sets and is located on the side wall of the backrest block respectively, the cross-section of the sliding housing is C-shaped, and the connection between one end of the connecting block and the sliding housing is a rotatable connection.

[0013] As a preferred embodiment of the present invention, the second electro-hydraulic cylinder is provided in two sets and is located on the side wall of the sliding guide rail respectively. The outer shell is annular and made of plastic. The inner shell is made of 304# stainless steel and the outer diameter of the inner shell is the same as the inner diameter of the first pipe and the second pipe respectively.

[0014] As a preferred embodiment of the present invention, the inner shell is connected to the first pipe and the second pipe by a sliding connection, the first hydraulic push rod is provided in multiple sets and is located on the inner wall of the outer shell, and the positioning block is provided in two sets and is located on the opposite end faces of the first hydraulic push rod.

[0015] As a preferred embodiment of the present invention, the ball bearings are arranged in multiple sets and are respectively located on the outer wall of the positioning block. The positioning block is located at the port of the first pipe. The ball bearings and the first pipe are connected by a sliding connection. The second hydraulic push rods are arranged in multiple sets and are respectively located on the outer wall of the inner shell.

[0016] As a preferred embodiment of the present invention, the mounting plate is provided in multiple sets and is located on the outer wall of the inner shell respectively; the electrically controlled cylinder clamp is provided in multiple sets and is located on the outer wall of the mounting plate respectively; and the rubber ring and the first pipe are connected by a sliding connection.

[0017] Compared with existing technologies, this invention, by setting a first electro-hydraulic cylinder in the trenchless cable jacking pipe to drive a rotating shaft to push a second fixed block to one side, causes the second fixed block to apply a thrust to the sliding guide rail. When one end of the connecting block is inserted into the inner wall of the sliding housing, the connecting block can rotate on the inner wall of the sliding housing. When the connecting block is fully inserted into the inner wall of the sliding housing, the connecting block can only slide to one side on the inner wall of the sliding housing. At the same time, the sliding guide rail drives the second universal joint to rotate, causing the second electro-hydraulic cylinder to shift to one side, so that the sliding guide rail moves to the set position. The installation of the device is simpler, eliminating the need to assemble the accessories in the launch pit one by one, which greatly saves construction time. This solves the problem of assembling jacking pipe components, which is inconvenient because it requires assembling the jacking pipe in the launch pit, requiring the supporting equipment to be placed in the launch pit one by one for assembly, resulting in many construction steps, which is time-consuming and delays the construction progress.

[0018] The first hydraulic jacking rod pressurizes and pushes the second pipe a short distance. Then, one end of the second hydraulic jacking rod drives the first hydraulic jacking rod to retract onto the inner wall of the inner shell. The dual-axis servo motor drives the hub to rotate, allowing the device to move on the inner wall of the pipe. The subsequent relay assembly applies pressure forward, filling the gap left by the moved relay assembly. The same process is repeated to remove the relay assemblies for recycling, which saves construction costs. This solves the problem that in long-distance pipe jacking construction, the distant pipe jacking machine may not have enough force due to the long distance, thus requiring the use of relays to supplement thrust. However, retrieving the relay assembly increases the construction difficulty, and there is no efficient and economical way to retrieve the relay assembly.

[0019] The controller controls the operation of the first hydraulic jacking rod by contacting the port of the second pipeline with the positioning block. This pressurizes the first hydraulic jacking rod, causing one end of the first hydraulic jacking rod to exert a thrust on the second pipeline through the positioning block. This pushes the second pipeline to one side, causing the pipe jacking machine to move. When the pipe jacking machine is running, it will deviate. Although a correction cylinder is installed inside the pipe jacking machine to correct it in time, the pipeline behind the pipe jacking machine will still deviate. This causes the pipeline on one side of the relay room to deviate. Since the relay room is located at the port of the pipeline, the pipeline deviation will cause one end of the first hydraulic jacking rod inside the relay room to move. This deviation of the first hydraulic jacking rod will greatly affect the service life of the device. The ball bearing greatly reduces the impact of the pipeline end face deviation on the first hydraulic jacking rod, thus solving the problem of the relay room cylinder being affected by pipeline deviation during pipe jacking construction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the first pipeline cross-sectional structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the sliding guide rail structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the inter-relay component structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the guide rail assembly structure of the present invention.

[0025] In the diagram: 1. Backrest block; 2. Cylinder bracket; 3. Electro-hydraulic cylinder; 4. Guide rail assembly; 401. First universal joint; 402. Sliding housing; 403. First fixed block; 404. Rotating shaft; 405. First electro-hydraulic cylinder; 406. Rotating shaft; 407. Second fixed block; 408. Second universal joint; 409. Sliding guide rail; 410. Connecting block; 411. Second electro-hydraulic cylinder; 5. Pressure equalizing ring; 6. First pipe; 7. Middle Intercalation assembly; 701, outer shell; 702, first hydraulic jacking rod; 703, positioning block; 704, ball bearing; 705, fixing plate; 706, second hydraulic jacking rod; 707, inner shell; 708, through hole; 709, mounting plate; 710, electrically controlled cylinder clamp; 711, dual-axis servo motor; 712, hub; 713, rubber ring; 8, second pipe; 9, pipe jacking machine; 10, laser theodolite; 11, sludge pump; 12, controller. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Example: Please refer to Figure 1-5 The trenchless cable jacking method shown includes a backrest block 1, a cylinder frame 2 installed on the outer wall of the backrest block 1, an electrically controlled cylinder 3 installed on the inner wall of the cylinder frame 2, a guide rail assembly 4 installed on the outer wall of the backrest block 1, an equalizing ring 5 installed at one end of the electrically controlled cylinder 3, a first pipe 6 installed on the outer wall of the equalizing ring 5, a relay assembly 7 installed at the port of the first pipe 6, a second pipe 8 installed at one end of the relay assembly 7, a jacking machine 9 installed at one end of the second pipe 8, a laser theodolite 10 installed on one side of the cylinder frame 2 and on the outer wall of the backrest block 1, and a sludge pump 11 installed on the other side of the cylinder frame 2 and on the base surface of the backrest block 1, with a controller 12 installed on the outer wall of the sludge pump 11.

[0028] In this embodiment, specific references Figure 1 and Figure 5 The guide rail assembly 4 includes a first universal joint 401 and a sliding housing 402. The first universal joint 401 is mounted on the outer wall of the backrest block 1. Two sets of the first universal joint 401 are provided and are located on the outer wall of the backrest block 1 respectively. A first fixing block 403 is mounted on one end of the first universal joint 401. A rotating shaft 404 is mounted on the inner wall of the first fixing block 403 opposite to it. The first fixing block 403 and the rotating shaft 404 are connected by a rotatable connection. A first electro-hydraulic cylinder 405 is rotatably connected to the outer wall of the rotating shaft 404. A rotating shaft 406 is mounted on one end of the first electro-hydraulic cylinder 405. The first electro-hydraulic cylinder 405 and the rotating shaft 406 are connected by a rotatable connection. A second fixing block 407 is rotatably connected to the outer wall of the rotating shaft 406. A second universal joint 408 is mounted on the outer wall of the second fixing block 407. A sliding guide rail 409 is installed at one end. The sliding guide rail 409 is located directly below the first pipe 6 and is connected by a sliding connection. The sliding guide rail 409 is located directly below the outer shell 701 and is connected by a sliding connection. A connecting block 410 is installed at one end of the sliding guide rail 409. A sliding housing 402 is installed on the side wall of the backrest block 1. Two sets of sliding housings 402 are provided and are located on the side wall of the backrest block 1 respectively. The cross-section of the sliding housing 402 is C-shaped. A connecting block 410 is slidably connected to the inner wall of the sliding housing 402. The cross-section of the connecting block 410 is F-shaped. One end of the connecting block 410 is connected to the sliding housing 402 by a rotational connection. A second electro-hydraulic cylinder 411 is installed on the side wall of the sliding guide rail 409. Two sets of the second electro-hydraulic cylinder 411 are provided and are located on the side wall of the sliding guide rail 409 respectively.

[0029] The sliding guide rail 409 is connected to the protrusion of the connecting block 410. When the protrusion of the connecting block 410 is located on one side of the sliding housing 402, the device can rotate freely. When the connecting block 410 is fully inserted into the inner wall of the sliding housing 402, the protrusion of the connecting block 410 is stuck at the port of the sliding housing 402, and the connecting block 410 can only drive the sliding guide rail 409 to slide.

[0030] In this embodiment, specific references Figure 2 and Figure 4The relay assembly 7 includes a housing 701, which is installed at the port of the first pipe 6. The housing 701 has an annular structure and is made of plastic. Multiple sets of first hydraulic push rods 702 are installed on the inner wall of the housing 701. Two sets of positioning blocks 703 are installed at one end of each first hydraulic push rod 702, located on opposite end faces of the first hydraulic push rod 702. A ball bearing 704 is embedded in the outer wall of the positioning block 703. The ball bearing 704 and the first pipe 6 are connected by a sliding connection. Multiple sets of ball bearings 704 are provided and are located on the outer wall of the positioning block 703. The positioning block 703 is located at the port of the first pipe 6. A fixing plate 705 is installed on the outer wall of the first hydraulic push rod 702. A second hydraulic push rod 706 is installed on the outer wall of the fixing plate 705. Multiple sets of second hydraulic push rods 706 are provided and are located on the outer wall of the inner shell 707. An inner shell 707 is installed at one end of the pressure rod 706. The inner shell 707 is made of 304# stainless steel. The outer diameter of the inner shell 707 is the same as the inner diameter of the first pipe 6 and the second pipe 8. The inner shell 707 is slidably connected to the first pipe 6 and the second pipe 8. A through hole 708 is opened on the outer wall of the inner shell 707. The laser theodolite 10 is directly opposite the position of the through hole 708. An mounting plate 709 is installed on one side of the through hole 708 and on the outer wall of the inner shell 707. Multiple sets of electric cylinder clamps 709 are provided and are located on the outer wall of the inner shell 707. An electric cylinder clamp 710 is installed on the outer wall of the mounting plate 709. Multiple sets of electric cylinder clamps 710 are provided and are located on the outer wall of the mounting plate 709. A dual-axis servo motor 711 is installed at one end of the electric cylinder clamp 710. The drive shaft of the dual-axis servo motor 711 is connected to a hub 712. A rubber ring 713 is installed on the outer wall of the hub 712. The rubber ring 713 and the first pipe 6 are connected by a sliding connection.

[0031] The controller 12 is connected to the electric hydraulic cylinder 3, the pipe jacking machine 9, the laser theodolite 10, the sludge pump 11, the first electric hydraulic cylinder 405, the second electric hydraulic cylinder 411, the first hydraulic jacking rod 702, the second hydraulic jacking rod 706, the electric cylinder clamp 710, and the dual-axis servo motor 711 via wires. The device is powered by the controller 12. The backrest block 1 has an L-shaped cross-section, which facilitates the installation of accessories. The cylinder frame 2 is provided in two sets and is located on the outer wall of the backrest block 1. The cylinder frame 2 is a frame structure. The electric hydraulic cylinder 3 is provided in multiple sets and is located on the outer wall of the backrest block 1. The sludge pump 11 is connected to the pipe jacking machine 9 via a conduit, which facilitates the suction of the sludge crushed by the pipe jacking machine 9.

[0032] In this trenchless cable jacking method, the backrest block 1 of the device is placed on the inner wall of the launching pit. Then, the switch of the controller 12 is turned on, causing the controller 12 to control the first electro-hydraulic cylinder 405 to operate. This causes the length of the first electro-hydraulic cylinder 405 to change, so that one end of the first electro-hydraulic cylinder 405 rotates on the outer wall of the rotating shaft 404, while the other end of the first electro-hydraulic cylinder 405 rotates on the outer wall of the rotating shaft 406. This causes the first electro-hydraulic cylinder 405 to drive the rotating shaft 406 to push the second fixed block 407 towards... When one side rotates, the second fixed block 407 applies a pushing force to the sliding guide rail 409, causing the sliding guide rail 409 to drive the connecting block 410 to rotate on the inner wall of the sliding housing 402. Two sets of connecting blocks 410 are provided on the side walls of the rear backrest block 1 in the sliding housing 402. The sliding housing 402 has a C-shaped cross-section. The connection between one end of the connecting block 410 and the sliding housing 402 is a rotatable connection. Under the action of this action, the controller 12 controls the second electro-hydraulic cylinder 411 to operate. When the second electro-hydraulic cylinder 411 operates, the second electro-hydraulic cylinder 411... The two ends of the sliding guide rail 409 are respectively pushed to move to predetermined positions on both sides, so that the sliding guide rail 409 drives the connecting block 410 to slide to one side on the inner wall of the sliding housing 402. Since the cross-section of the connecting block 410 is F-shaped, when one end of the connecting block 410 is inserted into the inner wall of the sliding housing 402, the connecting block 410 can rotate on the inner wall of the sliding housing 402. When the entire connecting block 410 is inserted into the inner wall of the sliding housing 402, under the limiting effect of the protrusion of the connecting block 410, the connecting block 410 can only move on the inner wall of the sliding housing 402. The inner wall of component 2 slides to one side, while the sliding guide rail 409 drives the second universal joint 408 to rotate, causing the first electro-hydraulic cylinder 405 to shift to one side. At the same time, the sliding guide rail 409 moves to the set position. The installation of the device is simpler, and there is no need to put the accessories into the launch pit one by one for assembly, which greatly saves construction time. This solves the problem of assembling the jacking pipe components, which is very inconvenient because the jacking pipe needs to be assembled in the launch pit one by one. The supporting equipment needs to be put into the launch pit one by one for assembly, which involves many construction steps and is time-consuming and delays the construction progress.

[0033] The controller 12 controls the operation of the electric hydraulic cylinder 3, which pushes the equalizing ring 5 to one side. With the sliding guide rail 409 located directly below the first pipe 6 and connected in a sliding manner, and the sliding guide rail 409 located directly below the outer casing 701 and connected in a sliding manner, the equalizing ring 5 drives the first pipe 6 to move to one side. The first pipe 6 then pushes the relay assembly 7 and the second pipe 8 to one side in sequence. At the same time, the controller 12 controls the pipe jacking machine 9 to operate and cut and crush the soil and gravel. Then, with the sludge pump 11 connected to the pipe jacking machine 9 through the conduit, the sludge produced by the pipe jacking machine 9 is sucked out by the sludge pump 11 through the conduit for treatment. At the same time, the controller 12 controls the operation of the laser theodolite 10 to generate laser. With the laser theodolite 10 facing the through hole 708, the laser is emitted through the through hole 708 and irradiates the laser receiving end of the pipe jacking machine 9 for position calibration, so that the pipe jacking machine 9 can carry out pipe jacking construction.

[0034] A first hydraulic jacking rod 702 is installed on the inner wall of the outer casing 701. A positioning block 703 is installed at one end of the first hydraulic jacking rod 702. Under the action of ball bearings 704 embedded in the outer wall of the positioning block 703, the positioning block 703 contacts the port of the second pipe 8. The controller 12 controls the operation of the first hydraulic jacking rod 702, causing the first hydraulic jacking rod 702 to be pressurized. This causes one end of the first hydraulic jacking rod 702 to apply a thrust to the second pipe 8 through the positioning block 703, causing the second pipe 8 to push the pipe jacking machine 9 to one side. When the pipe jacking machine 9 enters the receiving well, it is first hoisted and moved away. Then, the controller 12 controls the movement of the second hydraulic jacking rod 706, causing the second hydraulic jacking rod 706 to move the fixing plate 705 to one side. The fixing plate 705 then moves the first hydraulic jacking rod 702 to the inner wall of the inner shell 707. Since the outer diameter of the inner shell 707 is the same as the inner diameter of the first pipe 6 and the second pipe 8, and the inner shell 707 is connected to the first pipe 6 and the second pipe 8 by a sliding connection, the first hydraulic jacking rod 702 is completely retracted. On the inner wall of the inner shell 707, with the outer shell 701 made of plastic and the inner shell 707 made of 304# stainless steel, when the first hydraulic push rod 702 retracts, the ball bearing 704 better facilitates the sliding of the positioning block 703, causing the outer shell 701 to be damaged and detached. The plastic material of the outer shell 701 does not affect the fit of the pipe. At the same time, the controller 12 controls the operation of the electric cylinder clamp 710. A dual-axis servo motor 711 is installed at one end of the electric cylinder clamp 710, and the drive shaft of the dual-axis servo motor 711 is connected to the hub 712. With the rubber ring 713 installed on the outer wall of the hub 712, one end of the electric cylinder clamp 710 applies force to the dual-axis servo motor 711 and moves. The hub 712 drives the rubber ring 713 to adhere to the inner wall of the first pipe 6. Then, simply turn on the drive switch of the controller 12 to make the dual-axis servo motor 711 drive the hub 712 to rotate, so that the relay assembly 7 as a whole applies thrust. Moreover, the inner shell 707 and the second pipe 8 are connected by a sliding connection, so that the relay assembly 7 can be moved out of the inner wall of the second pipe 8.

[0035] By simply pressurizing the first hydraulic jacking rod 702 in the relay assembly 7 near the receiving well to push the second pipe 8 a short distance, one end of the second hydraulic jacking rod 706 drives the first hydraulic jacking rod 702 to retract onto the inner wall of the inner shell 707. Then, the dual-axis servo motor 711 drives the hub 712 to rotate, allowing the device to move on the inner wall of the pipe. Then, the subsequent relay assembly 7 applies pressure forward, filling the gap left by the moved relay assembly 7. Similarly, the relay assemblies 7 are moved out one by one for recycling, which saves construction costs. This solves the problem that in long-distance pipe jacking construction, the long distance makes the far-end pipe jacking machine insufficient in force, so relays are needed to supplement thrust. Relays include recyclable relays and non-recyclable relays. However, recycling relays increases construction difficulty, requiring disassembly of the hydraulic cylinders and increasing labor costs, while not recycling increases construction material costs. There is no efficient and economical relay recycling method.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A trenchless cable jacking pipe, comprising a backrest block (1), characterized in that: A cylinder frame (2) is installed on the outer wall of the backrest block (1), an electric cylinder (3) is installed on the inner wall of the cylinder frame (2), a guide rail assembly (4) is installed on the outer wall of the backrest block (1), a pressure equalizing ring (5) is installed at one end of the electric cylinder (3), a first pipe (6) is installed on the outer wall of the pressure equalizing ring (5), a relay assembly (7) is installed at the port of the first pipe (6), a second pipe (8) is installed at one end of the relay assembly (7), a pipe jacking machine (9) is installed at one end of the second pipe (8), a laser theodolite (10) is installed on one side of the cylinder frame (2) and on the outer wall of the backrest block (1), a sludge pump (11) is installed on the other side of the cylinder frame (2) and on the base surface of the backrest block (1), and a controller (12) is installed on the outer wall of the sludge pump (11). The guide rail assembly (4) includes a first universal joint (401) and a sliding housing (402). The first universal joint (401) is mounted on the outer wall of the backrest block (1). A first fixing block (403) is mounted on one end of the first universal joint (401). A rotating shaft (404) is mounted on the inner wall opposite to the first fixing block (403). A first electro-hydraulic cylinder (405) is rotatably connected to the outer wall of the rotating shaft (404). A rotating shaft (406) is mounted on one end of the first electro-hydraulic cylinder (405). A second fixed block (407) is rotatably connected to the outer wall. A second universal joint (408) is installed on the outer wall of the second fixed block (407). A sliding guide rail (409) is installed at one end of the second universal joint (408). A connecting block (410) is installed at one end of the sliding guide rail (409). The sliding housing (402) is installed on the side wall of the backrest block (1). The connecting block (410) is slidably connected to the inner wall of the sliding housing (402). A second electro-hydraulic cylinder (411) is installed on the side wall of the sliding guide rail (409). The relay assembly (7) includes a housing (701) installed at the port of the first pipe (6). A first hydraulic push rod (702) is installed on the inner wall of the housing (701). A positioning block (703) is installed at one end of the first hydraulic push rod (702). A ball bearing (704) is embedded in the outer wall of the positioning block (703). A fixing plate (705) is installed on the outer wall of the first hydraulic push rod (702). A second hydraulic push rod (706) is installed on the outer wall of the fixing plate (705). An inner shell (707) is installed at one end of (706). A through hole (708) is provided on the outer wall of the inner shell (707). An mounting plate (709) is installed on one side of the through hole (708) and on the outer wall of the inner shell (707). An electric cylinder clamp (710) is installed on the outer wall of the mounting plate (709). A dual-axis servo motor (711) is installed at one end of the electric cylinder clamp (710). A hub (712) is connected to the drive shaft of the dual-axis servo motor (711). A rubber ring (713) is installed on the outer wall of the hub (712).

2. The trenchless cable jacking pipe according to claim 1, characterized in that: The controller (12) is connected to the electric hydraulic cylinder (3), the pipe jacking machine (9), the laser theodolite (10), the sludge pump (11), the first electric hydraulic cylinder (405), the second electric hydraulic cylinder (411), the first hydraulic jacking rod (702), the second hydraulic jacking rod (706), the electric cylinder clamp (710), and the dual-axis servo motor (711) via wires, and the connection method is electrical connection. The backrest block (1) has an L-shaped cross-section.

3. The trenchless cable jacking pipe according to claim 1, characterized in that: The cylinder frame (2) is provided in two sets and is located on the outer wall of the backrest block (1). The electric control cylinder (3) is provided in multiple sets and is located on the outer wall of the backrest block (1). The laser theodolite (10) is facing the through hole (708). The sludge pump (11) is connected to the pipe jacking machine (9) through a conduit. The first universal joint (401) is provided in two sets and is located on the outer wall of the backrest block (1).

4. The trenchless cable jacking pipe according to claim 1, characterized in that: The first fixed block (403) and the rotating shaft (404) are connected by a rotatable connection. The first electro-hydraulic cylinder (405) and the rotating shaft (406) are connected by a rotatable connection. The sliding guide rail (409) is located directly below the first pipe (6) and is connected by a sliding connection. The sliding guide rail (409) is located directly below the outer shell (701) and is connected by a sliding connection.

5. The trenchless cable jacking pipe according to claim 1, characterized in that: The connecting block (410) has an F-shaped cross-section. The sliding housing (402) has two sets located on the side wall of the backrest block (1). The sliding housing (402) has a C-shaped cross-section. The connection between one end of the connecting block (410) and the sliding housing (402) is a rotatable connection.

6. The trenchless cable jacking pipe according to claim 1, characterized in that: The second electro-hydraulic cylinder (411) is provided in two sets and is located on the side wall of the sliding guide rail (409). The outer shell (701) is annular and made of plastic. The inner shell (707) is made of 304# stainless steel and the outer diameter of the inner shell (707) is the same as the inner diameter of the first pipe (6) and the second pipe (8).

7. The trenchless cable jacking pipe according to claim 1, characterized in that: The inner shell (707) is connected to the first pipe (6) and the second pipe (8) by a sliding connection. The first hydraulic push rod (702) is provided in multiple sets and is located on the inner wall of the outer shell (701). The positioning block (703) is provided in two sets and is located on the opposite end faces of the first hydraulic push rod (702).

8. The trenchless cable jacking pipe according to claim 1, characterized in that: The ball bearings (704) are arranged in multiple sets and are respectively located on the outer wall of the positioning block (703). The positioning block (703) is located at the port of the first pipe (6). The ball bearings (704) and the first pipe (6) are connected by a sliding connection. The second hydraulic push rods (706) are arranged in multiple sets and are respectively located on the outer wall of the inner shell (707).

9. The trenchless cable jacking pipe according to claim 1, characterized in that: The mounting plate (709) is provided in multiple sets and is located on the outer wall of the inner shell (707). The electric cylinder clamp (710) is provided in multiple sets and is located on the outer wall of the mounting plate (709). The rubber ring (713) and the first pipe (6) are connected by a sliding connection.

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