A remediation device that can pre-treat pipe deformation prior to trenchless pipe repair

Abstract

The application relates to a correction device which can pre-treat pipeline deformation before pipeline trenchless repair, and the correction device comprises a correction mechanism for pipeline deformation correction and an oil pump mechanism for powering the correction mechanism, the oil pump mechanism is connected with the correction mechanism through a pipeline, the correction mechanism comprises a frame, two arc-shaped correction plates for pipeline correction and a tensioning and releasing assembly for tensioning and releasing the arc-shaped correction plates, one end of the arc-shaped correction plate close to the frame is hingedly connected with the frame, the tensioning and releasing assembly is installed on the frame, and the tensioning and releasing assembly is connected with the arc-shaped correction plate. Through the combined design of the correction mechanism and the oil pump mechanism, the pipeline deformation can be pre-treated from the inside of the pipeline without excavating the road surface and damaging the surface facilities, the influence of construction on traffic, environment and resident life is greatly reduced, and the engineering cost and complexity are reduced.

Description

Technical Field

[0001] This application relates to the field of pipeline repair technology, and in particular to a corrective device that can pre-treat pipeline deformation before trenchless pipeline repair. Background Technology

[0002] With the acceleration of urbanization, the safe operation of underground pipelines is becoming increasingly important. Traditional pipeline repair methods often require road excavation, which is not only costly and time-consuming, but also has a serious impact on traffic, the environment, and residents' lives. In recent years, trenchless repair technology has gradually become mainstream, but its prerequisite is that pipeline deformation needs to be corrected in advance. At present, the industry's pretreatment technology for pipeline deformation is not yet mature, and there is an urgent need for efficient and precise correction devices.

[0003] In existing technologies, pipeline deformation pretreatment mainly employs methods such as mechanical jacking, airbag expansion, or manual tapping for correction. Mechanical jacking forcibly resets the pipeline using rigid supports, but it is prone to causing secondary damage; airbag expansion relies on uniform air pressure application, but its effectiveness is limited for severe deformations; manual tapping is inefficient and difficult to control in terms of precision. These methods generally suffer from problems such as uneven force application, poor adaptability, or complex operation.

[0004] Regarding the aforementioned technologies, existing technologies cannot simultaneously achieve precise force application and flexible adjustment, which can easily lead to pipe wall rupture or inadequate correction; moreover, they rely on manual experience, resulting in low construction efficiency. Summary of the Invention

[0005] To address the problems of existing technologies being unable to balance precise force application and flexible adjustment, which can easily lead to pipe wall rupture or inadequate correction, and relying on manual experience resulting in low construction efficiency, this application provides a correction device that can pre-treat pipe deformation before trenchless pipe repair.

[0006] This application provides a corrective device for pre-treating pipeline deformation before trenchless pipeline repair, employing the following technical solution:

[0007] A correction device for pre-treating pipeline deformation before trenchless pipeline repair includes a correction mechanism for correcting pipeline deformation and an oil pump mechanism for powering the correction mechanism. The oil pump mechanism is connected to the correction mechanism via a pipeline. The correction mechanism includes a frame, two arc-shaped correction plates for pipeline correction, and a tensioning assembly for opening and closing the arc-shaped correction plates. The end of the arc-shaped correction plate near the frame is hinged to the frame. The tensioning assembly is mounted on the frame and connected to the arc-shaped correction plates.

[0008] By adopting the above technical solution, the oil pump mechanism allows the hydraulic system to precisely control the magnitude and speed of the applied force. The operator can apply the corrective force smoothly and gradually according to the degree of deformation and the condition of the pipeline, avoiding secondary damage to the pipeline. One end of the arc-shaped correction plate is hinged to the frame, allowing the correction plate to open and close around the hinge point. This structure ensures the certainty of the movement trajectory while also providing a certain degree of flexibility. It allows the opening and closing components to directly drive the arc-shaped plate, resulting in a short force transmission path, high efficiency, and a relatively simple structure. It is easy to arrange and operate within the limited space of the pipeline, and also reduces the number of failure points. At the same time, through the combined design of the correction mechanism and the oil pump mechanism, the deformation can be pre-treated from inside the pipeline without excavating the road surface or damaging surface facilities, greatly reducing the impact of construction on traffic, the environment, and residents' lives, and lowering the project cost and complexity.

[0009] Preferably, the tensioning assembly includes a hydraulic telescopic component, a first connecting block, a connecting rod, and a second connecting block. One end of the hydraulic telescopic component is connected to the frame, and the other end of the hydraulic telescopic component is connected to the first connecting block. The first connecting block is hinged to the connecting rod, and the end of the connecting rod away from the first connecting block is hinged to the second connecting block. The top of the second connecting block is connected to the upper arc-shaped correction plate.

[0010] By adopting the above technical solution, a linkage mechanism is formed between the connecting rod and the first and second connecting blocks. The thrust of the hydraulic telescopic component is converted into a larger opening and closing stroke or a larger force of the arc-shaped correction plate through the linkage mechanism, so that the upper arc-shaped correction plate can pre-repair the deformed pipe. During the opening and closing process, it can form surface contact (rather than point contact) with the deformed part of the pipe, so that the correction force is evenly distributed on the inner wall of the pipe, reducing local stress concentration and protecting the pipe body from additional damage.

[0011] Preferably, the correction mechanism further includes a support assembly for auxiliary support of the lower arc-shaped correction plate and a reinforcement assembly for support of the upper arc-shaped correction plate.

[0012] By adopting the above technical solutions, when working inside the pipeline, the lower arc-shaped correction plate often bears a greater reaction force (especially the load in the direction of gravity). The support component can provide additional support points for the lower correction plate by contacting the inner wall of the bottom of the pipeline or other fixed structures, offsetting part of the counter-thrust force during deformation correction, preventing the entire correction mechanism from tilting or shaking downwards due to excessive force, and ensuring the stability of the device's position inside the pipeline. The reinforcement component enhances the connection strength between the upper correction plate and the frame, reduces the deformation of the upper correction plate caused by bending under force, and extends the service life of the device.

[0013] Preferably, the support assembly includes a support rod, a first slider, a guide rod, and a connecting plate. One end of the support rod is connected to a first connecting block, and the other end of the support rod is connected to the first slider. The first slider is sleeved and connected to the guide rod. Both ends of the guide rod are connected to the connecting plate, and the bottom of the connecting plate is connected to the lower arc-shaped correction plate.

[0014] By adopting the above technical solution, when the hydraulic telescopic component drives the upper correction plate to move, the displacement of the first connecting block will synchronously drive the lower support structure to adjust through the support rod, ensuring that the lower support can "respond in real time" when the upper correction force is applied, forming a dynamic balance of "upper force application - lower support", avoiding correction deviation caused by support lag. The support component, through the design of "linkage force transmission + sliding adaptation + rigid dispersion", not only ensures efficient transmission of support force and directional stability, but also flexibly adapts to the complex deformation of the bottom of the pipeline, while simplifying operation and maintenance, and providing reliable lower support guarantee for the pre-treatment before trenchless pipeline repair.

[0015] Preferably, a spring for buffering the first slider is sleeved on the guide rod, and the spring is located between the first slider and the connecting plate.

[0016] By adopting the above technical solution, during the pipeline correction process, when the hydraulic telescopic component drives the opening and closing assembly to move, the thrust of the upper arc-shaped correction plate on the pipeline will be transmitted to the lower support assembly through mechanical linkage, which may generate instantaneous impact force. The spring can absorb this impact force through its own elastic deformation, avoiding wear, deformation or breakage of components such as the first slider, guide rod, and connecting plate due to rigid collision, and extending the service life of the equipment.

[0017] Preferably, the reinforcement assembly includes a reinforcement rod, a second slider, a guide post, and a fixing plate. One end of the reinforcement rod is hinged to the first connecting block, and the other end of the reinforcement rod is hinged to the second slider. The second slider is sleeved and connected to the guide post. Both ends of the guide post are connected to the fixing plate, and the fixing plate is connected to the upper arc-shaped correction plate.

[0018] By adopting the above technical solution, one end of the reinforcing rod is hinged to the first connecting block of the tensioning assembly, and the other end is connected to the upper arc-shaped correction plate through the second slider, guide post, and fixing plate. Together with the original tensioning assembly, it forms a triangular stable structure of "dual-path force transmission". Part of the force is transmitted to the first connecting block through the connecting rod, and the other part is transmitted to the first connecting block synchronously through the reinforcing rod. This avoids the bending or breakage of a single connecting rod due to excessive force, and significantly improves the thrust bearing capacity of the upper correction plate against stubborn deformation.

[0019] Preferably, the oil pump mechanism includes a machine body, an oil pump body, a solenoid valve, and an oil pressure gauge. The oil pump body is installed on the top of the machine body, and the solenoid valve and the oil pressure gauge are both installed on the machine body.

[0020] By adopting the above technical solution, the oil pump mechanism achieves structural simplification through integrated design, and realizes precise control and safety monitoring of hydraulic power through the synergistic effect of solenoid valve and oil pressure gauge, providing stable, controllable and efficient power guarantee for pipeline correction operations.

[0021] Preferably, the bottom end of the machine body is provided with mounting holes, and the number of mounting holes is several, and the mounting holes are evenly distributed on the machine body.

[0022] By adopting the above technical solution and using a "multiple quantity + even distribution" layout of mounting holes, the adaptability and flexibility of the equipment are maximized while ensuring installation stability. This not only meets the fixed requirements of different operating scenarios but also provides convenience for later maintenance and functional expansion.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The oil pump mechanism allows the hydraulic system to precisely control the magnitude and speed of the applied force. The operator can apply the corrective force smoothly and gradually according to the degree of deformation and the condition of the pipeline, avoiding secondary damage to the pipeline. One end of the arc-shaped correction plate is hinged to the frame, allowing the correction plate to open and close around the hinge point. This structure ensures both the certainty of the movement trajectory and a certain degree of flexibility, allowing the opening and closing components to directly drive the arc-shaped plate. The force transmission path is short, the efficiency is high, and the structure is relatively simple. It is easy to arrange and operate in the limited space inside the pipeline, and it also reduces the number of failure points. At the same time, through the combined design of the correction mechanism and the oil pump mechanism, the deformation can be pre-treated from the inside of the pipeline without excavating the road surface or damaging the surface facilities, which greatly reduces the impact of construction on traffic, environment and residents' lives, and reduces the cost and complexity of the project.

[0025] 2. When the hydraulic telescopic component drives the opening and closing assembly to move, the thrust of the upper arc-shaped correction plate on the pipeline will be transmitted to the lower support assembly through mechanical linkage, which may generate instantaneous impact force. The spring can absorb this impact force through its own elastic deformation, avoiding wear, deformation or breakage of components such as the first slider, guide rod, and connecting plate due to rigid collision, thus extending the service life of the equipment.

[0026] 3. One end of the reinforcing rod is hinged to the first connecting block of the tensioning assembly, and the other end is connected to the upper arc-shaped correction plate through the second slider, guide post, and fixing plate. Together with the original tensioning assembly, it forms a triangular stable structure of "dual-path force transmission". Part of the force is transmitted to the first connecting block through the connecting rod, and the other part is transmitted to the first connecting block synchronously through the reinforcing rod. This avoids the single connecting rod from bending or breaking due to excessive force, and significantly improves the thrust bearing capacity of the upper correction plate against stubborn deformation. Attached Figure Description

[0027] Figure 1 This is a front-view perspective view of the correction device;

[0028] Figure 2 This is a left-side stereoscopic view of the correction device;

[0029] Figure 3 This is a right-side sectional view of the correction device;

[0030] Figure 4 This is a left-side sectional view of the correction device;

[0031] Figure 5 This is a bottom sectional view of the correction mechanism.

[0032] Reference numerals: 100, Correction mechanism; 110, Frame; 120, Arc-shaped correction plate; 130, Tensioning assembly; 131, Hydraulic telescopic component; 132, First connecting block; 133, Connecting rod; 134, Second connecting block; 140, Support assembly; 141, Support rod; 142, First slider; 143, Guide rod; 144, Connecting plate; 145, Spring; 150, Reinforcing assembly; 151, Reinforcing rod; 152, Second slider; 153, Guide column; 154, Fixing plate; 200, Oil pump mechanism; 210, Body; 211, Mounting hole; 220, Oil pump body; 230, Solenoid valve; 240, Oil pressure gauge. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail.

[0034] This application discloses a correction device that can pre-treat pipeline deformation before trenchless pipeline repair.

[0035] Reference Figure 1 and Figure 2A correction device for pre-treating pipeline deformation before trenchless pipeline repair includes a correction mechanism 100 for correcting pipeline deformation and an oil pump mechanism 200 for powering the correction mechanism 100. The oil pump mechanism 200 is detachably connected to the correction mechanism 100 via a pipeline. The correction mechanism 100 includes a frame 110 for supporting the correction mechanism 100, two arc-shaped correction plates 120 for pipeline correction, and a tensioning assembly 130 for opening and closing the arc-shaped correction plates 120. The ends of the two arc-shaped correction plates 120 near the frame 110 are hinged to the frame 110. The tensioning assembly is mounted on the frame 110 and the two arc-shaped correction plates 120, and is located between the two arc-shaped correction plates 120. The oil pump mechanism 200 allows the hydraulic system to precisely control the magnitude and speed of the applied force. The operator can apply corrective force smoothly and gradually according to the degree of deformation and the condition of the pipeline, avoiding secondary damage to the pipeline. One end of the arc-shaped correction plate 120 is hinged to the frame 110, allowing the correction plate to open and close around the hinge point. This structure ensures the certainty of the movement trajectory while also providing a certain degree of flexibility. The opening and closing component 130 directly drives the arc-shaped plate, resulting in a short force transmission path, high efficiency, and a relatively simple structure. It is easy to arrange and operate in the limited space inside the pipeline, and also reduces the number of failure points. At the same time, through the combined design of the correction mechanism 100 and the oil pump mechanism 200, the deformation can be pre-treated from inside the pipeline without excavating the road surface or damaging surface facilities, greatly reducing the impact of construction on traffic, the environment, and residents' lives, and lowering the project cost and complexity.

[0036] The oil pump mechanism 200 includes a body 210, an oil pump body 220, a solenoid valve 230, and an oil pressure gauge 240. The oil pump body 220 is mounted on the top of the body 210. The solenoid valve 230 and the oil pressure gauge 240 are both mounted on the body 210. The bottom end of the body 210 has mounting holes 211, which are evenly distributed on the body 210. This oil pump mechanism 200 achieves structural simplification through integrated design. With the synergistic effect of the solenoid valve 230 and the oil pressure gauge 240, it achieves precise control and safety monitoring of hydraulic power, providing stable, controllable, and efficient power guarantee for pipeline correction operations. At the same time, through the "multiple + evenly distributed" mounting hole layout, it maximizes the adaptability and flexibility of the equipment while ensuring installation stability. It not only meets the fixed requirements of different operating scenarios but also provides convenience for later maintenance and functional expansion.

[0037] refer to Figure 2 and Figure 3The tensioning mechanism includes a hydraulic telescopic component 131, a first connecting block 132, a connecting rod 133, and a second connecting block 134. One end of the hydraulic telescopic component 131 is fixedly connected to the frame 110, and the other end of the hydraulic telescopic component 131 is fixedly connected to the first connecting block 132. The first connecting block 132 is concave and is hinged to the connecting rod 133. The end of the connecting rod 133 away from the first connecting block 132 is hinged to the second connecting block 134. The second connecting block 134 is located on the side near the upper arc-shaped correction plate 120. It is fixedly connected to the upper arc-shaped correction plate 120; a linkage mechanism is formed between the connecting rod 133 and the first connecting block 132 and the second connecting block 134. The thrust of the hydraulic telescopic component 131 is converted into a larger opening and closing stroke or a larger force of the arc-shaped correction plate 120 through the linkage mechanism, so that the upper arc-shaped correction plate 120 can pre-repair the deformed pipe. During the opening and closing process, it can form surface contact with the deformed part of the pipe rather than point contact, so that the correction force is evenly distributed on the inner wall of the pipe, reducing local stress concentration and protecting the pipe body from additional damage.

[0038] refer to Figure 3 and Figure 4 The correction mechanism 100 also includes a support assembly 140 for auxiliary support of the lower arc-shaped correction plate 120 and a reinforcement assembly 150 for supporting the lower arc-shaped correction plate 120. Both the reinforcement assembly 150 and the support assembly 140 are connected to the first connecting block 132 on the hydraulic telescopic member 131. The reinforcement assembly 150 and the support assembly 140 are located between the two arc-shaped correction plates 120. When operating inside the pipeline, the lower arc-shaped correction plate 120 often bears a greater reaction force. The support assembly 140 can provide additional support points for the lower correction plate by contacting the inner wall of the bottom of the pipeline or other fixed structures, offsetting part of the counter-thrust force during deformation correction, preventing the entire correction mechanism 100 from tilting or shaking downwards due to excessive force, and ensuring the stability of the device's position inside the pipeline. The reinforcement assembly 150 reduces the deformation of the upper correction plate caused by bending under force by enhancing the connection strength between the upper correction plate and the frame 110, thus extending the service life of the device.

[0039] refer to Figure 4The support assembly 140 includes a support rod 141, a first slider 142, a guide rod 143, and a connecting plate 144. One end of the support rod 141 near the first connecting block 132 is fixedly connected to the first connecting block 132, and the other end of the support rod 141 is fixedly connected to the first slider 142. The first slider 142 is sleeved on the guide rod 143, allowing the guide rod 143 to guide the first slider 142. Both ends of the guide rod 143 are fixedly connected to the connecting plate 144, and the bottom end of the connecting plate 144 is fixedly connected to the lower arc-shaped correction plate 120. When the hydraulic telescopic component 131 is driven upwards... When the square correction plate moves, the displacement of the first connecting block 132 will synchronously drive the lower support structure to adjust through the support rod 141, ensuring that the lower support can "respond in real time" when the upper correction force is applied, forming a dynamic balance of "upper force application - lower support", avoiding correction deviation caused by support lag. The support component 140, through the design of "linkage force transmission + sliding adaptation + rigid dispersion", not only ensures efficient transmission of support force and directional stability, but also flexibly adapts to the complex deformation of the bottom of the pipeline, while simplifying operation and maintenance, and providing reliable lower support guarantee for the pre-treatment before trenchless pipeline repair.

[0040] A spring 145 for buffering the first slider 142 is sleeved on the guide rod 143. The spring 145 is located between the first slider 142 and the connecting plate 144. During the pipeline correction process, when the hydraulic telescopic component 131 drives the tensioning assembly 130 to move, the thrust of the upper arc-shaped correction plate 120 on the pipeline will be transmitted to the lower support assembly 140 through mechanical linkage, which may generate instantaneous impact force. The spring 145 can absorb this impact force through its own elastic deformation, so as to prevent the first slider 142, guide rod 143, connecting plate 144 and other components from being worn, deformed or broken due to rigid collision, thus extending the service life of the equipment.

[0041] refer to Figure 5The reinforcing assembly 150 includes a reinforcing rod 151, a second slider 152, a guide post 153, and a fixing plate 154. One end of the reinforcing rod 151 near the first connecting block 132 is hinged to the first connecting rod 133, and the other end of the reinforcing rod 151 is hinged to the second slider 152. The second slider 152 is sleeved on the surface of the guide post 153. Both ends of the guide post 153 are fixedly connected to the fixing plate 154. The side of the fixing plate 154 near the upper arc-shaped correction plate 120 is fixedly connected to the upper arc-shaped correction plate 120. The reinforcing rod 151... One end is hinged to the first connecting block 132 of the tensioning assembly 130, and the other end is connected to the upper arc-shaped correction plate 120 through the second slider 152, guide post 153, and fixing plate 154. Together with the original tensioning assembly 130, it forms a triangular stable structure of "dual-path force transmission". Part of the force is transmitted to the first connecting block 132 through the connecting rod 133, and the other part is transmitted to the first connecting block 132 simultaneously through the reinforcing rod 151. This avoids the single connecting rod 133 from bending or breaking due to excessive force, and significantly improves the thrust bearing capacity of the upper correction plate for stubborn deformation.

[0042] The implementation principle of this application embodiment is as follows: During implementation, when pre-treatment correction of the pipeline is required, the correction mechanism 100 on the device is connected to the oil pump mechanism 200 via a hose. Then, the correction mechanism 100 is placed inside the pipeline, positioned at the location requiring pre-treatment correction, so that the lower arc-shaped correction plate 120 on the correction mechanism 100 contacts the inner wall of the pipeline. Then, the oil pump mechanism 200 is activated, causing the hydraulic telescopic component 131 on the correction mechanism 100 to operate. The hydraulic telescopic component 131 extends and retracts, driving the first connecting block 132 to move. The first connecting block 132 drives the connecting rod 133, the support assembly 140, and the reinforcement assembly 150 to move. The connecting rod 133 pushes the second connecting block 134 to move, and the second connecting block 134 pushes the upper arc-shaped correction plate 120. The upper arc-shaped correction plate 120 is opened, pushing the deformed part of the pipe upward to correct and restore the pipe. The reinforcing rod 151 also moves with the upper arc-shaped correction plate 120 and reinforces and pushes it, so that the upper arc-shaped correction plate 120 can better correct the pipe. The support assembly 140 supports the lower arc-shaped correction plate 120, so that the lower arc-shaped correction plate 120 is always in contact with the inner wall of the pipe. Thus, when the hydraulic telescopic component 131 drives the upper correction plate to move, the displacement of the first connecting block 132 will be synchronously driven by the support rod 141 to adjust the lower support structure. This ensures that when the upper correction force is applied, the lower support can "respond in real time", forming a dynamic balance of "upper force - lower support" and avoiding correction deviation caused by support lag.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A corrective device for pre-treating pipeline deformation before trenchless pipeline repair, characterized in that, The device includes a correction mechanism (100) for correcting pipe deformation and an oil pump mechanism (200) for powering the correction mechanism (100). The oil pump mechanism (200) is connected to the correction mechanism (100) via a pipe. The correction mechanism (100) includes a frame (110), two arc-shaped correction plates (120) for correcting pipe deformation, and a tensioning assembly (130) for opening and closing the arc-shaped correction plates (120). The arc-shaped correction plates (120) are hinged to the frame (110) at one end near the frame (110). The tensioning assembly (130) is mounted on the frame (110) and is connected to the arc-shaped correction plates (120).

2. The corrective device for pre-treating pipeline deformation before trenchless pipeline repair according to claim 1, characterized in that, The tensioning assembly (130) includes a hydraulic telescopic component (131), a first connecting block (132), a connecting rod (133), and a second connecting block (134). One end of the hydraulic telescopic component (131) is connected to the frame (110), and the other end of the hydraulic telescopic component (131) is connected to the first connecting block (132). The first connecting block (132) is hinged to the connecting rod (133), and the end of the connecting rod (133) away from the first connecting block (132) is hinged to the second connecting block (134). The top of the second connecting block (134) is connected to the upper arc-shaped correction plate (120).

3. The corrective device for pre-treating pipeline deformation before trenchless pipeline repair according to claim 2, characterized in that, The correction mechanism (100) also includes a support assembly (140) for auxiliary support of the lower arc-shaped correction plate (120) and a reinforcement assembly (150) for support of the upper arc-shaped correction plate (120).

4. The corrective device for pre-treating pipeline deformation before trenchless pipeline repair according to claim 3, characterized in that, The support assembly (140) includes a support rod (141), a first slider (142), a guide rod (143), and a connecting plate (144). One end of the support rod (141) is connected to the first connecting block (132), and the other end of the support rod (141) is connected to the first slider (142). The first slider (142) is sleeved and connected to the guide rod (143). Both ends of the guide rod (143) are connected to the connecting plate (144), and the bottom of the connecting plate (144) is connected to the lower arc-shaped correction plate (120).

5. The corrective device for pre-treating pipeline deformation before trenchless pipeline repair according to claim 4, characterized in that, A spring (145) for buffering the first slider (142) is sleeved on the guide rod (143), and the spring (145) is located between the first slider (142) and the connecting plate (144).

6. The corrective device for pre-treating pipeline deformation before trenchless pipeline repair according to claim 3, characterized in that, The reinforcement component (150) includes a reinforcement rod (151), a second slider (152), a guide post (153), and a fixing plate (154). One end of the reinforcement rod (151) is hinged to the first connecting block (132), and the other end of the reinforcement rod (151) is hinged to the second slider (152). The second slider (152) is sleeved and connected to the guide post (153). Both ends of the guide post (153) are connected to the fixing plate (154), and the fixing plate (154) is connected to the upper arc-shaped correction plate (120).

7. The corrective device for pre-treating pipeline deformation before trenchless pipeline repair according to claim 1, characterized in that, The oil pump mechanism (200) includes a body (210), an oil pump body (220), a solenoid valve (230), and an oil pressure gauge (240). The oil pump body (220) is mounted on the top of the body (210), and the solenoid valve (230) and the oil pressure gauge (240) are both mounted on the body (210).

8. The corrective device for pre-treating pipeline deformation before trenchless pipeline repair according to claim 7, characterized in that, The bottom end of the body (210) is provided with mounting holes (211), and the number of mounting holes (211) is several, and the mounting holes (211) are evenly distributed on the body (210).

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