Steel pipe jacking device

Abstract

This utility model relates to the field of construction equipment technology, specifically a steel pipe jacking pullback device, including a pipe jacking machine, a fixed slide rail, and a pullback housing. This utility model uses an electrically controlled cylinder to drive a limiting mechanism to move laterally, causing the outer support plate to expand outwards and open the inner wall of the fixed pipe section, forming a support structure to distribute the force on the pipe jacking machine head. During the pipe jacking machine pullback process, the control system uses a steel cable winder to reel in and unwind the steel cable to achieve the pullback operation, and dynamically adjusts the length of the steel cable to lift the pulled-back pipe section out of the working shaft. One end of an electrically controlled telescopic cylinder drives a pressure rod to move downwards. When the pressure rod moves downwards, it causes the pressure rod to drive the fixed plate downwards. The fixed plate applies a downward pushing force to the gripper, causing the gripper to rotate on the outer wall of the rotating rod, causing one end of the gripper to lift up and lock onto the outer wall of the top ring for fixation. The pullback assembly is connected to the top ring in the pipe jacking machine and is driven back by the pipe jacking machine.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment technology, specifically a steel jacking pipe pullback device. Background Technology

[0002] Pipe jacking is a trenchless or minimally excavated pipeline laying technology that solves the problems of damage to urban buildings and traffic congestion caused by pipeline laying. It also has advantages in stabilizing soil layers and protecting the environment. Existing steel pipe jacking pullback devices are standalone units. Due to the limited space at the bottom of the construction shaft, when the pipe jacking machine head pulls back, the hydraulic cylinder and support must be retrieved before the pullback device can be placed into the construction shaft. The installation process is cumbersome. For example, consider a pipe jacking fault pullback device (publication number CN212203) in the prior art. The existing technology represented by 366U involves setting the pullback base as a hexagonal steel plate, which is placed inside the working shaft with its larger surface facing the pipe jacking machine head. The pulling mechanism consists of several axially detachable pulling rods, with the first end connected to the pipe jacking machine head and the second end connected to the larger surface of the pullback base. A jack is positioned between the larger surface of the pullback base facing the pipe jacking machine head and the working shaft, and the jack pushes the pullback base away from the pipe jacking machine head. By using the pulling rods, pullback base, and pipe jacking machine head as a single unit, the jack is used to pull out the pipe section by section within the space between the pullback base and the working shaft, thereby removing the faulty pipe jacking machine head. This device has a simple structure, is easy to operate, improves work efficiency, and saves labor costs, effectively solving the problems of existing technologies. However, its structure still needs improvement, specifically as follows:

[0003] In this scheme, the pulling mechanism is connected to the pipe jacking head for fixation, and then the pipe jacking machine body is pulled back. When the pipe jacking head is damaged, pulling back the pipe jacking head also needs to consider that the multiple sets of pipe sections behind the pipe jacking head will increase the traction force of the pipe jacking head. Directly pulling back the pipe jacking machine body will cause the pipe jacking head to hit the joint. Since there are many pipe sections, directly pulling the pipe jacking head requires a huge pulling force, which will lead to the pipe jacking head being damaged by excessive force. Therefore, a steel pipe jacking pullback device is needed to improve the above problems. Utility Model Content

[0004] This invention provides a steel jacking pipe pullback device to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A steel pipe jacking pullback device includes a pipe jacking machine, fixed slide rails, and a pullback housing. Fixed slide rails are symmetrically arranged on the side wall of the pipe jacking machine. A pullback assembly is slidably connected to the outer wall of the fixed slide rails. A pullback housing is slidably connected to one side of the pullback assembly and located on the outer wall of the fixed slide rails. An electrically controlled cylinder is installed on the inner wall of the pullback housing. A fixed seat is installed on one side of the electrically controlled cylinder and located at the port of the pullback housing. A limit bracket is installed on the outer wall of the fixed seat. Opposite to the inner wall of the limit bracket are... The device has a rotating shaft, on the outer wall of which an outer support plate is rotatably connected. A rotating shaft is installed on one side of the rotating shaft and on the outer wall of the outer support plate. One end of the rotating shaft is rotatably connected to a limiting plate. One end of the limiting plate passes through a fixed seat and extends to the inner wall of the fixed seat, where a limiting base is connected. The limiting plate and the fixed seat are connected by a sliding connection. An electric control cylinder is connected to the limiting base. An adjusting rod is plugged into one side of the limiting plate and on the outer wall of the fixed seat. One end of the adjusting rod is equipped with a jacking drill bit connector.

[0007] As a preferred embodiment of this utility model, the pullback assembly includes a sliding housing, which is slidably connected to the outer wall of the fixed slide rail. An installation groove is formed in an annular shape on the inner wall of the sliding housing, and a fixing block is installed on the inner wall of the installation groove.

[0008] As a preferred embodiment of this utility model, a rotating rod is rotatably connected to the opposing inner walls of the fixed block, and an electrically controlled telescopic cylinder is rotatably connected to the outer wall of the rotating rod. A pressure rod is installed at one end of the electrically controlled telescopic cylinder.

[0009] As a preferred embodiment of this utility model, an mounting base is provided in an annular manner on the inner wall of the sliding housing, and a rotating rod is rotatably connected to the inner wall opposite to the mounting base, and a gripper is installed on the outer wall of the rotating rod.

[0010] As a preferred embodiment of this utility model, a fixing plate is installed at one end of the gripper, wherein a rotating rod is rotatably connected to the inner wall of the fixing plate, and two sets of fixing plates are provided and are respectively located on the outer wall of the gripper.

[0011] As a preferred embodiment of this utility model, a steel cable winder is installed at the port of the sliding housing, wherein a steel cable is provided on the inner wall of the steel cable winder, and one end of the steel cable is connected to the outer wall of the pullback housing.

[0012] As a preferred embodiment of the present invention, the pipe jacking machine further includes a pipe jacking base, and a hydraulic cylinder is provided on the outer wall of the pipe jacking base, wherein multiple sets of hydraulic cylinders are provided and are respectively located on the outer wall of the pipe jacking base.

[0013] As a preferred embodiment of this utility model, a top ring is installed at one end of the hydraulic cylinder. The top ring is located on one side of the sliding housing and is slidably connected to the outer wall of the fixed slide rail. Two sets of fixed slide rails are provided and are respectively located on the outer wall of the pipe jacking machine. A control cabinet is provided on the side wall of the pipe jacking base. The control cabinet is connected to the hydraulic cylinder, the electric telescopic cylinder, the steel cable winder and the electric cylinder through wires, and the connection method is electrical connection.

[0014] Compared with existing technologies, this utility model uses an external support rod in the steel pipe jacking pullback device to support the inner wall of the pipe section, thereby reducing the stress on the pipe jacking head. The limit mechanism is driven by an electric cylinder to move laterally, causing the external support plate to open outward and fix the inner wall of the pipe section, forming a support structure to distribute the stress on the pipe jacking head. During the pipe jacking pullback process, the control system uses a steel cable winder to wind and unwind the steel cable to achieve the pullback operation. By dynamically adjusting the length of the steel cable, the pulled-back pipe section is lifted out of the working shaft. Finally, by repeating the above actions, the pipe jacking head is gradually pulled back to the working shaft. This solves the problem that directly pulling back the pipe jacking machine body will cause the pipe jacking head to hit the joint. When there are many pipe sections, directly pulling the pipe jacking head requires a huge pullback force, which will lead to the pipe jacking head being damaged by excessive stress.

[0015] This invention, by incorporating a pullback assembly into a steel pipe jacking pullback device, enables the pullback assembly to be connected to the top ring of the pipe jacking machine. This allows the pipe jacking machine to drive the pullback assembly. One end of the electrically controlled telescopic cylinder drives the pressure rod downwards. When the pressure rod moves downwards, it causes the fixing plate to move downwards as well. The fixing plate applies a downward pushing force to the gripper, causing the gripper to rotate on the outer wall of the rotating rod. This causes one end of the gripper to lift up, securing it to the outer wall of the top ring. Since the pullback assembly is connected to the top ring in the pipe jacking machine, the pullback can be driven by the pipe jacking machine, reducing the size of the pullback device and facilitating pullback construction. This solves the problem that existing steel pipe jacking pullback devices are separate pieces of equipment. Due to limited space at the bottom of the construction shaft, when the pipe jacking machine head pulls back, the hydraulic cylinder and support must be retrieved before the pullback device can be placed into the construction shaft, making the installation process cumbersome. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a top view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the pullback component structure of this utility model;

[0019] Figure 4 This utility model Figure 3 Enlarged schematic diagram of structure A;

[0020] Figure 5 This is a schematic diagram of the pullback shell structure of this utility model.

[0021] In the diagram: 1. Pipe jacking machine; 101. Pipe jacking base; 102. Hydraulic cylinder; 103. Top ring; 2. Fixed slide rail; 3. Pull-back housing; 4. Pull-back assembly; 401. Sliding housing; 402. Mounting groove; 403. Fixing block; 404. Rotating rod; 405. Electrically controlled telescopic cylinder; 406. Pressure rod; 407. Mounting base; 408. Rotating rod; 409. Gripper; 410. Fixing plate; 411. Steel cable winder; 412. Steel cable one; 5. Electrically controlled cylinder; 6. Fixing seat; 7. Limiting bracket; 8. Rotating shaft; 9. Outer support plate; 10. Rotating shaft; 11. Limiting plate; 12. Limiting base; 13. Adjusting rod; 14. Pipe jacking drill bit connector; 15. Control cabinet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Example: Please refer to Figure 1-5 The steel pipe jacking pullback device shown includes a pipe jacking machine 1, a fixed slide rail 2, and a pullback housing 3. The fixed slide rail 2 is symmetrically arranged on the side wall of the pipe jacking machine 1. A pullback assembly 4 is slidably connected to the outer wall of the fixed slide rail 2. A pullback housing 3 is slidably connected to one side of the pullback assembly 4, located on the outer wall of the fixed slide rail 2. An electrically controlled cylinder 5 is installed on the inner wall of the pullback housing 3. A fixed seat 6 is installed on one side of the electrically controlled cylinder 5, located at the port of the pullback housing 3. A limit bracket 7 is installed on the outer wall of the fixed seat 6. A rotating shaft 8 is arranged on the inner wall opposite to the limit bracket 7. An outer support plate 9 is rotatably connected to the outer wall of the shaft 8. A rotating shaft 10 is installed on one side of the shaft 8 and on the outer wall of the outer support plate 9. A limiting plate 11 is rotatably connected to one end of the rotating shaft 10. One end of the limiting plate 11 passes through the fixed seat 6 and extends to the inner wall of the fixed seat 6, where a limiting base 12 is connected. The limiting plate 11 and the fixed seat 6 are connected by a sliding connection. An electric control cylinder 5 is connected to the limiting base 12. An adjusting rod 13 is plugged and pulled onto one side of the limiting plate 11 and on the outer wall of the fixed seat 6. A jacking drill bit connector 14 is installed at one end of the adjusting rod 13.

[0024] In this embodiment, specific references Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The pullback assembly 4 includes a sliding housing 401, which is slidably connected to the outer wall of the fixed slide rail 2. An annular mounting groove 402 is formed on the inner wall of the sliding housing 401. A fixing block 403 is mounted on the inner wall of the mounting groove 402. A rotating rod 404 is rotatably connected to the opposite inner wall of the fixing block 403. An electrically controlled telescopic cylinder 405 is rotatably connected to the outer wall of the rotating rod 404. A pressure rod 406 is mounted at one end of the electrically controlled telescopic cylinder 405. An annular mounting base 407 is formed on the inner wall of the sliding housing 401. A rotating rod 408 is rotatably connected to the inner wall opposite to the seat 407. A gripper 409 is installed on the outer wall of the rotating rod 408. A fixing plate 410 is installed at one end of the gripper 409. The rotating rod 408 is rotatably connected to the inner wall of the fixing plate 410. Two sets of fixing plates 410 are provided and are located on the outer wall of the gripper 409 respectively. A steel cable winder 411 is installed at the port of the sliding housing 401. A steel cable 412 is provided on the inner wall of the steel cable winder 411, and one end of the steel cable 412 is connected to the outer wall of the pullback housing 3.

[0025] The pipe jacking machine 1 also includes a pipe jacking base 101. A hydraulic cylinder 102 is installed on the outer wall of the pipe jacking base 101. Multiple sets of hydraulic cylinders 102 are located on the outer wall of the pipe jacking base 101. A top ring 103 is installed at one end of each hydraulic cylinder 102. The top ring 103 is located on one side of the sliding housing 401 and is slidably connected to the outer wall of the fixed slide rail 2. Two sets of fixed slide rails 2 are located on the outer wall of the pipe jacking machine 1. A control cabinet 15 is installed on the side wall of the pipe jacking base 101. The control cabinet 15 is electrically connected to the hydraulic cylinders 102, the electrically controlled telescopic cylinder 405, the steel cable winder 411, and the electrically controlled cylinder 5 via wires. This electrical connection enables the device to be powered on, thereby allowing the control cabinet 15 to control the operation of the hydraulic cylinders 102, the electrically controlled telescopic cylinder 405, the steel cable winder 411, and the electrically controlled cylinder 5.

[0026] In this scheme, the steel pipe jacking pullback device operates by turning on the switch of the control cabinet 15, which in turn controls the operation of the electrically controlled telescopic cylinder 405. This causes one end of the cylinder 405 to move the pressure rod 406 downwards. As the pressure rod 406 moves downwards, it causes the fixing plate 410 to move downwards as well. The fixing plate 410 applies a downward pushing force to the gripper 409, causing the gripper 409 to rotate on the outer wall of the rotating rod 408. This causes one end of the gripper 409 to lift up, thus lifting the gripper 409. 9 is fixed on the outer wall of the top ring 103 and connected to the top ring 103 in the pipe jacking machine 1 through the pullback assembly 4. This allows the pipe jacking machine 1 to drive the pullback during the pullback process, reducing the size of the pullback device and facilitating the pullback construction. This solves the problem that the existing steel pipe jacking pullback device is a separate piece of equipment. Due to the limited space at the bottom of the construction shaft, when the pipe jacking machine head pulls back, the pipe jacking hydraulic cylinder and support also need to be recovered before the pullback device can be placed into the construction shaft. The installation steps of the device are all cumbersome.

[0027] By pushing the pullback housing 3 into the inner cavity of the jacking pipe, when the pullback housing 3 is located on one side of the jacking head, and after the jacking head is fixedly connected by the jacking drill bit connector 14, the switch of the control cabinet 15 is turned on, so that the control cabinet 15 controls the electric cylinder 5 to operate. One end of the electric cylinder 5 pushes the limit base 12 to move laterally, so that the limit base 12 moves on the inner wall of the pullback housing 3, thereby causing the limit base 12 to drive the limit plate 11 to move, which will cause the limit plate 11 to move outward on the inner wall of the fixed seat 6. The limit plate 11 applies a pushing force to the outer support plate 9 through the rotating shaft 10, thereby causing the outer support plate 9 to rotate outward on the outer wall of the limit bracket 7 through the rotating shaft 8, thereby causing the outer support plate 9 to open outward and press against the inner wall of the pipe section for fixation.

[0028] When the pipe jacking machine 1 is jacked out by the pullback assembly 4, the control cabinet 15 will control the steel cable winder 411 to operate, thereby causing the steel cable winder 411 to take in the steel cable 412. Then, when the pipe jacking machine 1 is pulled back by the pullback assembly 4, the pullback assembly 4 will pull back the pullback housing 3 by the steel cable 412. Since the outer support plate 9 applies tension to the inner wall of the pipe section, the stress on the pipe jacking machine head is reduced. When the pipe jacking has moved a certain distance, the length of the steel cable 412 is adjusted, and the pulled-back pipe section is lifted out of the working shaft. Then the above actions are repeated until the entire pipe jacking machine head is completely pulled back to the working shaft. This solves the problem that directly pulling back the pipe jacking machine body will cause the pipe jacking machine head to hit the joint. When there are many pipe sections, directly pulling back the pipe jacking machine head requires a huge pullback force, which will cause the pipe jacking machine head to be damaged by a large force.

[0029] The hydraulic cylinder 102, electrically controlled telescopic cylinder 405, steel cable winder 411, electrically controlled cylinder 5, and control cabinet 15 used in this utility model are all existing known electrical equipment, and can all be purchased and used directly on the market. Their structure, circuit, and control principle are all existing known technologies. Therefore, the structure, circuit, and control principle of the hydraulic cylinder 102, electrically controlled telescopic cylinder 405, steel cable winder 411, electrically controlled cylinder 5, and control cabinet 15 will not be described in detail here.

[0030] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0031] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel pipe jacking pullback device, comprising a pipe jacking machine (1), a fixed slide rail (2), and a pullback housing (3), characterized in that: The pipe jacking machine (1) is symmetrically provided with fixed slide rails (2) on its side wall. A pullback assembly (4) is slidably connected to the outer wall of the fixed slide rail (2). A pullback housing (3) is slidably connected to one side of the pullback assembly (4) and located on the outer wall of the fixed slide rail (2). An electric control cylinder (5) is installed on the inner wall of the pullback housing (3). A fixed seat (6) is installed on one side of the electric control cylinder (5) and located at the port of the pullback housing (3). A limit bracket (7) is installed on the outer wall of the fixed seat (6). A rotating shaft (8) is provided on the inner wall opposite to the limit bracket (7). An outer support plate (9) is rotatably connected to the outer wall of the rotating shaft (8). A rotating shaft (10) is installed on one side of the rotating shaft (8) and on the outer wall of the outer support plate (9). One end of the rotating shaft (10) is rotatably connected to a limiting plate (11). One end of the limiting plate (11) passes through the fixed seat (6) and extends to the inner wall of the fixed seat (6) to connect to a limiting base (12). The limiting plate (11) and the fixed seat (6) are connected by a sliding connection. The limiting base (12) is connected to an electric control cylinder (5). An adjusting rod (13) is inserted and pulled on one side of the limiting plate (11) and on the outer wall of the fixed seat (6). One end of the adjusting rod (13) is equipped with a jacking drill bit connector (14).

2. The steel pipe jacking pullback device according to claim 1, characterized in that: The pullback assembly (4) includes a sliding housing (401), which is slidably connected to the outer wall of the fixed slide rail (2). An installation groove (402) is provided in an annular shape on the inner wall of the sliding housing (401), and a fixing block (403) is installed on the inner wall of the installation groove (402).

3. A steel pipe jacking pullback device according to claim 2, characterized in that: A rotating rod (404) is rotatably connected to the opposing inner wall of the fixed block (403), and an electrically controlled telescopic cylinder (405) is rotatably connected to the outer wall of the rotating rod (404). A pressure rod (406) is installed at one end of the electrically controlled telescopic cylinder (405).

4. A steel pipe jacking pullback device according to claim 3, characterized in that: An mounting base (407) is arranged in a ring on the inner wall of the sliding housing (401). A rotating rod (408) is rotatably connected to the inner wall opposite to the mounting base (407). A gripper (409) is installed on the outer wall of the rotating rod (408).

5. A steel pipe jacking pullback device according to claim 4, characterized in that: A fixing plate (410) is installed at one end of the gripper (409), wherein a rotating rod (408) is rotatably connected to the inner wall of the fixing plate (410), and two sets of fixing plates (410) are provided and are respectively located on the outer wall of the gripper (409).

6. A steel pipe jacking pullback device according to claim 5, characterized in that: A cable winder (411) is installed at the port of the sliding housing (401), wherein a steel cable (412) is provided on the inner wall of the cable winder (411), and one end of the steel cable (412) is connected to the outer wall of the pullback housing (3).

7. A steel pipe jacking pullback device according to claim 6, characterized in that: The pipe jacking machine (1) also includes a pipe jacking base (101), and a hydraulic cylinder (102) is provided on the outer wall of the pipe jacking base (101). Multiple sets of hydraulic cylinders (102) are provided and are located on the outer wall of the pipe jacking base (101).

8. A steel pipe jacking pullback device according to claim 7, characterized in that: One end of the hydraulic cylinder (102) is equipped with a top ring (103). The top ring (103) is located on one side of the sliding housing (401) and is slidably connected to the outer wall of the fixed slide rail (2). The fixed slide rail (2) is provided in two sets and is located on the outer wall of the pipe jacking machine (1). The side wall of the pipe jacking base (101) is provided with a control cabinet (15). The control cabinet (15) is connected to the hydraulic cylinder (102), the electric telescopic cylinder (405), the steel cable winder (411) and the electric cylinder (5) through wires and the connection method is electrical connection.

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