Device and method for replacing overhead pipe

Abstract

The invention discloses a replacement device and a replacement method for an overhead pipe. Comprising a working platform arranged at the tail end of a pipeline needing to be replaced, a winch and a crane. The working platform comprises a supporting platform for placing a pipeline, and a first pulley and a second pulley are further arranged on the working platform; the pulling direction of the pull rope is the same as the pipeline laying direction; in a pipeline dismounting state, a pull rope of the winch sequentially penetrates through the first pulley and the second pulley and is connected with a to-be-dismounted pipeline; in the state of installing the renewal pipeline, a pull rope of the winch sequentially penetrates through the first pulley, the second pulley and the third pulley to be connected with the renewal pipeline. And in addition, the pipeline is pulled out through the winch, and unified hoisting is carried out after cutting, so that the efficiency is higher, the problem that a main rolling line construction site and travelling cranes are short is solved, and the construction method is labor-saving, time-saving and labor-saving.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline installation, and in particular to an overhead pipe replacement device and a replacement method. Background Art

[0002] Process media pipelines are used to meet the needs of specific production processes, connecting various equipment and systems. They transport substances such as water and compressed air. To save space within factories, these pipelines are often installed on pipe corridors designed between the columns of the factory building. The pipes are supported by the corridor supports, and these pipelines are called overhead piping. For example, in the main plant of the pickling and rolling mill, the corridor supports are used to arrange various production media pipelines. Due to long-term production environment factors, the overhead pipelines suffer from severe corrosion and frequent leakage. Therefore, the overhead pipelines need to be replaced during technical transformation.

[0003] All pipeline corridors are fully enclosed welded structures, and a lifting port needs to be cut on the corridor support. Since the pipeline corridor is located in a position where the crane cannot directly lift it, a lifting device needs to be made to lift the pipeline. Then the pipeline is cut in sequence and the pipeline is pulled to the lifting port by a winch for lifting. Conversely, the pipeline installation is hoisted in reverse order. The welder needs to cut and weld on the pipeline corridor. After the pipeline is hoisted, the cut pipeline corridor support needs to be restored. There are a lot of high-altitude operations, which are very unsafe and difficult to ensure welding quality. In short, the existing technology has low construction efficiency when replacing pipelines, which further extends the construction period. In addition, during the technical transformation period, the construction site and the use of cranes are also very tight.

[0004] Therefore, there is an urgent need for a pipeline replacement method that can improve pipeline replacement efficiency and welding quality. Summary of the Invention

[0005] The purpose of this application is to solve the problems of inconvenience and low replacement efficiency of overhead pipelines in the prior art. Therefore, this application provides an overhead pipe replacement device and replacement method. A support platform is set at the end of the pipeline, the pipeline is pulled onto the support platform, and then the pipeline is cut and connected. The disassembled pipeline can be placed on the support platform and then hoisted uniformly, which is more efficient and has better quality.

[0006] To achieve the above objectives, in a first aspect, the present invention provides an overhead pipe replacement device, comprising a working platform, a winch, and a crane arranged at the end of the pipe to be replaced;

[0007] The working platform includes a supporting platform for placing the pipeline, and the working platform is also provided with a first pulley and a second pulley;

[0008] The second pulley can be moved and locked along the width direction of the pipeline. The first pulley is arranged near the hoist to receive the pull rope of the hoist. The first pulley can be angularly deflected in the moving direction of the second pulley to adapt to the movement of the second pulley.

[0009] The third pulley is arranged on the end of the pipeline corridor away from the working platform, and can be moved and locked along the width direction of the pipeline to adapt to the movement of the second pulley so that the pulling direction of the pull rope is the same as the laying direction of the pipeline;

[0010] When the overhead pipe is being dismantled, the pull rope of the hoist passes through the first pulley and the second pulley in sequence to connect to the pipe to be dismantled;

[0011] When the overhead pipe is installed and updated, the pull rope of the winch passes through the first pulley, the second pulley and the third pulley in sequence to connect the updated pipeline.

[0012] It should be noted that the pipe corridor is the original support for the pipeline, which is supported from the bottom of the pipeline. Because the pipeline is long, when pulling out the pipeline, it is necessary to pull out a section of the pipeline first, cut this section, and then pull out another section of the pipeline and cut it, gradually pulling out all the pipeline. When installing, it is also necessary to pull in a section of pipeline first, then connect the two new sections of pipeline, and then pull it into the pipe corridor, gradually pulling the entire pipeline into the pipeline corridor. The pipeline is arranged along the width of the pipeline. The laying direction is the horizontal extension direction of the pipeline.

[0013] Typically, multiple pipes are placed side by side in a pipe corridor. Consequently, if the pull cord's pulling direction remains constant, the pipes can tilt, making them difficult to adjust. By adopting the above technical solution, the pulling direction is aligned with the pipe laying direction, allowing for faster pipe removal and preventing them from tilting or getting stuck. It also allows the pipe to return to its designated position when a new pipe is pulled in, preventing it from tilting.

[0014] Using the above technical solution, the present application first pulls the pipeline onto a support platform before cutting the pipe and then allowing workers to operate the pipe. This improves the safety and efficiency of replacement operations. During installation (typically using welding), this also facilitates welding for welders, improving weld quality. During pulling, a second pulley adjusts the pull rope's direction to prevent the pipe from tilting. Furthermore, a winch is used to pull the pipe out, and after cutting, it is hoisted together, resulting in a more efficient construction method that saves labor, time, and effort. In some embodiments, the crane is a hot coil span crane, reducing the need for a main rolling line crane. This method is also being used in other technical improvement projects, significantly reducing construction time.

[0015] In some embodiments, the working platform further includes a standing platform for people to stand on, and the standing platform is arranged below the supporting platform.

[0016] By adopting the above solution, workers can stand on the working platform, which makes it convenient for them to perform cutting and welding work and improves the construction quality.

[0017] In some embodiments, the support platform includes support rods, cross bars and blocks; multiple support rods are supported on the upper surface of the standing platform, and the cross bars are arranged on the support rods to form a portal support frame, and the height of the portal support frame corresponds to the pipe corridor. Multiple portal support frames are arranged along the length direction of the pipe to support the pipe pulled out of the pipe corridor; blocks are provided at both ends of the cross bars.

[0018] By adopting the above technical solution, multiple portal frames are formed by cooperating with multiple support rods and cross bars. The portal frames support the pipes, which are not only light in weight but also have sufficient strength. In addition, blocks are provided on the edges of the portal frames to prevent the pipes from sliding off the cross bars.

[0019] In some embodiments, a handrail is also provided at the edge of the standing platform.

[0020] By adopting the above technical solution, the standing platform is protected by the railing.

[0021] In some embodiments, a ladder is provided between the standing platform and the ground, the arrangement direction of the ladder is the same as the pipeline laying direction, and the handrail is provided at the edge of the ladder.

[0022] The stairs make it convenient for people to go up and down the standing platform. Setting the direction of the stairs in this way can also save space.

[0023] In some embodiments, the hoist is disposed below the working platform;

[0024] The working platform is also provided with a pulley support frame, and the pulley support frame is located on a side of the working platform away from the pipeline corridor;

[0025] The first pulley is arranged at the bottom of the pulley support frame, opposite to the winch. The second pulley is arranged above the first pulley, and the pull rope passing through the second pulley is slightly higher than the pipe to prevent jamming when pulling the pipe.

[0026] The above solution is adopted, and the pulley is supported by a pulley support frame. The first pulley is located opposite to the winch and receives the pull rope coming out of the winch. In addition, the second pulley is slightly higher than the pipe to prevent jamming when pulling the pipe, making it more convenient to pull the pipe with the rope.

[0027] In some embodiments, the second pulley is fixed to the pulley support frame through a pulley fixing bolt hole, and a plurality of pulley fixing bolt holes are provided on the pulley support frame along the arrangement direction of the plurality of pipes, so that the second pulley can be displaced, adjusted and fixed along the pulley support frame.

[0028] By adopting the above solution, the position of the second pulley can be conveniently adjusted.

[0029] In a second aspect, the present invention further provides a method for replacing an overhead pipe, using the above-mentioned overhead pipe replacement device, comprising the following steps:

[0030] S1: Remove the connections and U-bolts at both ends of the pipe to be replaced;

[0031] S2: Pulling the pipeline from the pipeline gallery to the support platform by a winch;

[0032] S3: cutting the pipe and rolling the cut pipe to one side of the working platform;

[0033] S4: Using a crane to lift the cut pipe away;

[0034] S5: Repeat steps S2-S4 until the pipeline is completely removed;

[0035] S6: Lift the new pipeline onto the supporting platform;

[0036] S7: Passing the pull rope of the hoist around the third pulley and returning it to the support platform, and connecting it to the new pipeline;

[0037] S8: Pull the new pipeline into the pipeline corridor by a winch;

[0038] S9: Grind the groove and connect the two new pipes;

[0039] S10: Repeat steps S8 and S9 until the new pipeline is installed.

[0040] By adopting the above technical solution, the pipeline is first pulled onto the platform, cut on the platform, and then hoisted, and the new pipeline is also connected on the platform. This arrangement can speed up the pipeline replacement.

[0041] In some embodiments, in step S2 and step S8, the pulling direction of the winch rope is adjusted so that the pulling direction is the same as the laying direction of the pipeline.

[0042] The pulling direction is the same as the pipeline laying direction, which makes it easier to pull the pipeline out of the pipeline corridor. The pipeline is not easy to tilt, and the pipeline can be directly pulled into the position where it needs to be installed during installation.

[0043] In some embodiments, before step S2 , a loop is formed at the end of the pull rope of the hoist, and the loop is connected to the end of the pipeline.

[0044] The above solution makes it easier to connect the pipe and the pull rope.

[0045] In some embodiments, when the pipeline is connected to the pull rope of the winch, the connection is made through a shackle; in step S8, when the pipeline is pulled into the pipeline corridor, the head of one end of the pipeline in the moving direction is set to be conical.

[0046] The above solution makes it easier to pull the pipeline in and prevents the pipeline from getting stuck in the pipeline corridor.

[0047] Existing pipelines are often composed of multiple pipes welded together. When pulling out the old pipeline, it is necessary to cut it every time a section is pulled out. When installing, welding is also performed every time a section is installed. Therefore, it is necessary to connect and disassemble the pipeline and the pull rope many times. The above solution can be used to connect and disassemble more quickly.

[0048] In summary, compared to the prior art, the present invention provides a novel method for replacing overhead pipes. This method utilizes a multifunctional platform to support the pipe, provide a standing platform for personnel, and pull the pipe. This ensures that the pull rope is always pulled along the pipe, is highly adaptable to replacing multiple pipes arranged side by side, and improves pipe replacement efficiency for workers. This method is a labor-saving, time-saving, and energy-saving method for pipe replacement.

[0049] Other features and corresponding beneficial effects of the present application are described in the latter part of the specification, and it should be understood that at least some of the beneficial effects become obvious from the description in the specification of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention and its features, configurations, and advantages will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not necessarily drawn to scale, emphasis being placed on illustrating the subject matter of the present invention.

[0051] Figure 1 This is a front view of an overhead pipe replacement device in an embodiment of the present invention in a pipe extraction state;

[0052] Figure 2 A top view of an overhead pipe replacement device in an embodiment of the present invention in a pipe extraction state;

[0053] Figure 3For an embodiment of the present invention, the overhead pipe replacement device is a front view of the pipe loading state;

[0054] Figure 4 Schematic diagram of the conical end of the pipeline when the pipeline is pulled into the pipeline corridor in one embodiment of the present invention.

[0055] Description of reference numerals:

[0056] 1. Pipeline; 11. Pipe corridor; 21. Standing platform; 22. Support platform; 221. Support rod; 222. Cross bar; 223. Block; 3. Pulley support frame; 31. First pulley; 32. Second pulley; 33. Third pulley; 34. Safety cover; 4. Winch; 41. Pull rope; 5. Ladder; 6. Railing; 7. Crane. DETAILED DESCRIPTION

[0057] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0058] In the description of the present invention, it should be noted that the terms "upper," "lower," "horizontal," "front," and "rear" and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present application and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implicitly specify the number of the technical features referred to. Therefore, features defined as "first," "second," and the like may explicitly or implicitly include one or more of such features. Furthermore, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, for example, to mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances. In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0059] Example

[0060] See also Figure 1-3This embodiment provides an overhead pipeline replacement device, including a working platform arranged at the end of the pipeline 1 to be replaced, a winch 4 and a crane 7;

[0061] The working platform includes a support platform 22 for placing the pipeline 1, and a first pulley 31 and a second pulley 32 are also provided on the working platform;

[0062] The second pulley 32 can be moved and locked along the width direction of the pipeline 1. The first pulley 31 is arranged near the hoist 4 to receive the pull rope 41 of the hoist 4. The first pulley 31 can be angularly deflected in the moving direction of the second pulley 32 to adapt to the movement of the second pulley 32.

[0063] The third pulley 33 is arranged on the end of the pipeline corridor 11 away from the working platform. It can be moved and locked along the width direction of the pipeline 1 to adapt to the movement of the second pulley 32 so that the pulling direction of the pull rope 41 is the same as the laying direction of the pipeline 1;

[0064] When the pipe 1 is being disassembled, the pull rope 41 of the hoist 4 passes through the first pulley 31 and the second pulley 32 in sequence to connect to the pipe to be disassembled;

[0065] When the updated pipeline 1 is installed, the pull rope 41 of the hoist 4 passes through the first pulley 31, the second pulley 32 and the third pulley 33 in sequence to connect the updated pipeline.

[0066] It should be noted that the pipeline corridor is the original support of the pipeline, which is supported below the pipeline. The existing method of dismantling the pipeline 1 is to operate the pipeline 1 directly on the pipeline corridor 11. The pipeline corridor 11 is entirely welded structure, so it is necessary to cut a lifting port on the corridor support. Since the crane 7 cannot directly lift the pipeline corridor 11, it is also necessary to make a lifting device to lift the pipeline 1, and lay the lifting device through the lifting port; then the pipeline 1 is cut in turn, and the winch 4 is used to pull the pipeline 1 to the lifting port for lifting. On the contrary, the installation of the pipeline 1 is lifted in reverse order, and the welder needs to cut and weld on the pipeline corridor 11. After the pipeline 1 is lifted, the cut pipeline corridor 11 support needs to be restored. There are a lot of high-altitude operations, which are very unsafe and difficult to ensure welding quality. In addition, there are many contents in the transformation of the main rolling line, and the construction site and the use of the crane 7 are also very tight.

[0067] Specifically, the solution of the present application further includes a standing platform 21 . The standing platform 21 is arranged below the supporting platform 22 .

[0068] The solution of this application provides a standing platform 21 and a support platform 22, on which workers can handle the pipe 1. Pipe 1 is placed on the support platform 22, making it more convenient to handle the pipe 1. Cut pipes 1 are placed on the side corners of the support platform 22 or the standing platform 21 and can be centrally lifted by a crane. New pipes 1 can also be lifted onto the platform all at once using a crane 7. Crane 7 does not need to wait for a long time at the end of the pipe 1, saving crane 7 usage time and improving construction efficiency. In some embodiments, crane 7 can be configured as a hot coil cross crane, reducing the use of the main rolling line crane. This can be used for other technical improvement projects, significantly shortening the construction period.

[0069] Compared with the prior art in which construction is performed directly on the pipeline corridor 11 , this device significantly improves the efficiency of construction through the standing platform 21 and the supporting platform 22 .

[0070] Specifically, a standing platform 21 and a support platform 22 are located at the left end of the pipe 1 to be replaced. The standing platform 21 is preferably constructed of overlapping steel members. The height of the standing platform 21 is determined by the height of the pipe corridor 11, leaving enough space for workers to stand and for the pipe 1 to be placed. Typically, the height is approximately 800 mm. A ladder 5 is located in front of the standing platform 21, positioned horizontally to conserve space. Safety railings 6 are provided at the edges of the ladder 5 and the standing platform 21.

[0071] A pulley support frame 3 is also provided on the left side of the standing platform 21. Preferably, the pulley support frame 3 is also made of steel materials. A plurality of pulley fixing bolt holes (not shown in the figure) are provided on the top of the pulley support frame 3 along the arrangement direction of the plurality of pipes 1. The pulley support frame 3 is provided with a second pulley 32 so that the second pulley can be adjusted and fixed along the pulley support frame 3. When all the pipes 1 at a position on the pipe corridor 11 are pulled out, the position of the second pulley 32 is adjusted so that the second pulley 32 can face the pipe 1 to be pulled out, and the second pulley 32 is slightly higher than the height of the pipe 1, so that the pull rope 41 pulls the pipe 1 at a slightly upward angle to prevent the pipe 1 from getting stuck when being pulled. The first pulley 31 is arranged below the second pulley 32 and is used to receive the pull rope 41 pulled out from the winch 4. The winch 4 is arranged at the bottom of the platform or other suitable position. Therefore, the first pulley 31 is arranged at the bottom of the pulley support frame 3, and the second pulley 32 is installed at the top of the pulley support frame 3, so that the pull rope is guided by the first pulley 31 and the second pulley 32 to move the pipeline in and out of the pipeline corridor.

[0072] join Figure 4When the pipe 1 is pulled into the pipe corridor 11, the head of the pipe 1 is made into a cone. In one embodiment, the specific manufacturing process is as follows: multiple cuts are made longitudinally in the pipe 1, and then the uncut part is smashed toward the center of the pipe 1 to form a cone. The top of the cone is provided with a shackle connection hole, and the pipe 1 is connected to the pull rope 41 through the shackle. This facilitates the pulling of the pipe into the pipe corridor 1.

[0073] See also Figure 3 The third pulley 33 is arranged on the other end of the pipeline corridor 11 away from the working platform, and can be moved and locked in the front-to-back direction to adapt to the movement of the second pulley 32. When the pipeline 1 needs to be pulled into the pipeline corridor, the pull rope 41 passes around the third pulley 33 and returns to the position of the support platform. When the pipeline 1 is pulled into the pipeline corridor 11, the pull rope 41 passes through the first pulley 31, the second pulley 32 and the third pulley 33 in sequence and is connected to the pipeline 1. Specifically, the third pulley 33 is also fixed to the pipeline corridor 11 through the pulley fixing bolt hole, and the pipeline corridor 11 is provided with a plurality of pulley fixing bolt holes.

[0074] Specifically, a support platform 22 for supporting the pipeline 1 is provided on the standing platform 21, including a support rod 221, a cross bar 222 and a block 223; two support rods 221 are supported on the upper surface of the standing platform 21, and the cross bar 222 is provided on the support rod 221 to form a portal support frame. The height of the portal support frame corresponds to the pipeline corridor 11. Multiple portal support frames are arranged along the length direction of the pipeline 1 to support the pipeline 1 pulled out of the pipeline corridor 11.

[0075] Specifically, both ends of the crossbar 222 are provided with stoppers 223. The stoppers 223 are fixed to both ends of the crossbar 222 and are higher than the crossbar 222. When the pipe 1 is supported on the crossbar 222, the stoppers 223 can prevent the pipe 1 from sliding off the crossbar 222.

[0076] The present application also provides an overhead pipe replacement method: the specific pipeline replacement process is as follows: 1. Install the standing platform 21 and the supporting platform 22, and install the pulley and winch 4; 2. Weave the rope end of the winch 4 into a ring to facilitate connection with the pipeline 1; 3. Confirm the listing by the three parties (production party, inspection party, and construction party); 4. Cut and replace the end of the pipeline 1 and the TOP point interface and remove the U-bolt of the pipeline 1, disconnect all connections of the pipeline 1, and facilitate the pulling out of the pipeline 1; 5. Cut a round hole at the end of the pipeline 1 and use a shackle to connect the pull rope 41 to the pipeline 1; 6. Operate the winch 4 to pull the steel pipe a certain distance to the supporting platform 22 7. Cut the pipe 1 and roll it to the side of the support platform 22 for storage; 8. Repeat steps (5-7) to remove the pipe 1; 9. Use the crane 7 to lift the removed pipe 1; 10. Use the crane 7 to lift the new pipe 1 to the support platform 22; 11. Pass the pull rope 41 around the third pulley 33 and return it to the support platform 22, then use the shackle to connect the pull rope 41 to the pipe 1; 12. Operate the winch 4 to pull the new steel pipe part into the pipe corridor 11; 13. Grind the groove and weld the pipe 1; 14. Repeat steps (12-13) to replace the second pipe 1 in sequence until the replacement of the pipe 1 is completed. It should be noted that in the process of pulling the pipe 1, the pulling direction of the pull rope 41 needs to be the same as the setting direction of the pipe 1.

[0077] Those skilled in the art should understand that those skilled in the art can implement variations in combination with the prior art and the above-mentioned embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present invention and will not be described in detail here. The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the equipment and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. An overhead pipe replacement device, characterized in that: It comprises a working platform, a winch (4) and a crane (7) arranged at the end of the pipeline (1) to be replaced, wherein the working platform comprises a supporting platform (22) on which the pipeline (1) is placed; The working platform is also provided with a first pulley (31) and a second pulley (32); The second pulley (32) can be moved and locked along the width direction of the pipeline (1); the first pulley (31) is arranged at a position close to the hoist (4) to receive the pull rope (41) of the hoist (4); the first pulley (31) can be angularly deflected in the moving direction of the second pulley (32) to adapt to the movement of the second pulley (32); The third pulley (33) is arranged on the end of the pipeline corridor (11) away from the working platform, and can be moved and locked along the width direction of the pipeline (1) to adapt to the movement of the second pulley (32) so that the pulling direction of the pull rope (41) is the same as the laying direction of the pipeline (1); When the pipeline (1) is being disassembled, the pull rope (41) of the hoist (4) passes through the first pulley (31) and the second pulley (32) in sequence to connect the pipeline (1) to be disassembled; When the updated pipeline (1) is installed, the pull rope (41) of the winch (4) passes through the first pulley (31), the second pulley (32) and the third pulley (33) in sequence to connect the updated pipeline (1).

2. The device for replacing an overhead pipe according to claim 1, characterized in that; The working platform further comprises a standing platform (21) for people to stand on, the standing platform (21) being arranged below the supporting platform (22), and a handrail (6) being arranged at the edge of the standing platform (21).

3. The device for replacing an overhead pipe according to claim 2, It is characterized by: The support platform (22) comprises a support rod (221), a cross rod (222) and a stopper (223); a plurality of the support rods (221) are supported on the upper surface of the standing platform (21); the cross rods (222) are arranged on the support rods (221) to form a portal support frame; the height of the portal support frame corresponds to the pipe gallery (11); a plurality of the portal support frames are arranged along the length direction of the pipe (1) to support the pipe (1) pulled out of the pipe gallery (11); Stoppers (223) are provided at both ends of the crossbar (222).

4. The device for replacing an overhead pipe according to claim 2, characterized in that: A ladder (5) is provided between the standing platform (21) and the ground, the arrangement direction of the ladder (5) is the same as the laying direction of the pipeline (1), and the handrail (6) is provided at the edge of the ladder (5).

5. The device for replacing an overhead pipe according to claim 1, characterized in that; A pulley support frame (3) is also provided on the working platform, and the pulley support frame (3) is located on a side of the working platform away from the pipeline corridor (11); The first pulley (31) is arranged at the bottom of the pulley support frame (3) and is opposite to the winch (4). The second pulley (32) is arranged above the first pulley (31), and the height of the pull rope (41) passing through the second pulley (32) is higher than the pipe (1), so as to prevent the pipe (1) from getting stuck when being pulled.

6. The device for replacing an overhead pipe according to claim 5, It is characterized by: The second pulley (32) is fixed to the pulley support frame (3) via a pulley fixing bolt hole, and a plurality of pulley fixing bolt holes are provided on the pulley support frame (3) along the arrangement direction of the plurality of pipes (1), so that the second pulley (32) can be displaced, adjusted and fixed along the pulley support frame (3).

7. A method for replacing an overhead pipe, characterized in that: Using the replacement device for the overhead pipe according to any one of claims 1 to 6 comprises the following steps: S1: removing the connections at both ends of the pipeline (1) to be replaced and the connection between the pipeline (1) and the pipeline corridor (11); S2: Pulling the pipeline (1) out of the pipeline gallery (11) onto the support platform (22) by means of a winch (4); S3: cutting the pipe (1), and rolling the cut pipe (1) to one side of the working platform; S4: using a crane (7) to lift the cut pipe (1); S5: Repeat steps S2-S4 until the pipeline (1) is completely dismantled; S6: hoisting the new pipeline (1) onto the supporting platform (22); S7: The pull rope (41) of the winch (4) is passed around the third pulley (33) and returned to the support platform (22), and connected to the new pipeline (1); S8: Pulling the new pipeline (1) into the pipeline gallery (11) by means of a winch (4); S9: grinding the groove and connecting the two new pipes (1); S10: Repeat steps S8 and S9 until the new pipeline (1) is installed.

8. The method for replacing an overhead pipe according to claim 7, characterized in that: In step S2 and step S8, the pulling direction of the pull rope (41) of the winch (4) is adjusted so that the pulling direction is the same as the laying direction of the pipeline (1).

9. The method for replacing an overhead pipe according to claim 7, characterized in that: Before step S2, a ring is formed at the end of the pull rope (41) of the hoist (4), and the ring is connected to the end of the pipeline (1).

10. The method for replacing an overhead pipe according to claim 7, characterized in that: When the pipeline (1) is connected to the pull rope (41) of the winch (4), the connection is made via a shackle; In step S8, when the pipeline (1) is pulled into the pipeline corridor (11), the head of one end of the pipeline (1) in the moving direction is set to be conical.

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