A pipeline pipe surface pretreatment rust removal device suitable for multi-pipe diameter

Abstract

A kind of pipeline pipe surface pretreatment rust removal device suitable for multiple pipe diameters.Pertains to water conservancy pipeline processing field.Existing pipeline rust removal device is mostly fixed pipe diameter design, only single or small range pipe diameter can be adapted to pipeline, face different engineering scene diversification pipe specification, need frequently change equipment.The utility model discloses a hanger, installation crossbeam, left page turn clamping plate, right page turn clamping plate, T type roof, threaded sleeve, lead screw and turn plate pressure wheel;Hanger is connected with left page turn clamping plate and right page turn clamping plate, lead screw is rotated in threaded sleeve by screw thread structure, when lead screw rotates, threaded sleeve is moved along lead screw;Turn plate pressure wheel is symmetrically arranged on T type roof, turn plate pressure wheel is used in cooperation between left page turn clamping plate and right page turn clamping plate, when T type roof drives turn plate pressure wheel vertically moves up and down, the rotation angle between left page turn clamping plate and right page turn clamping plate is changed, and the pipeline of different pipe diameters is clamped.The utility model is applied to water conservancy pipeline rust removal field.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy pipeline processing, specifically to a rust removal device for pretreatment of pipe surfaces suitable for multi-diameter pipes. Background Technology

[0002] As a core infrastructure in fields such as fluid transportation and engineering construction, pipelines are susceptible to serious corrosion, which can severely affect their service life, sealing performance, and transportation safety. Therefore, pretreatment and rust removal of the pipeline surface is a crucial step in pipeline installation and maintenance.

[0003] Most pipe rust removal devices on the market are designed for fixed pipe diameters and can only be adapted to pipes with a single or small range of diameters. When faced with diverse pipe specifications in different engineering scenarios, it is necessary to frequently replace equipment or adjust the structure, which not only increases construction costs but also significantly reduces rust removal efficiency.

[0004] Meanwhile, traditional rust removal devices are mostly fixed installations with poor mobility, making them difficult to adapt to complex construction environments such as outdoor areas and large sites. Furthermore, the rust removal components of some devices are inconvenient to install and disassemble, resulting in high subsequent maintenance costs, and they cannot meet the needs for efficient and convenient pipeline pretreatment. Utility Model Content

[0005] This invention addresses the problem that existing pipe rust removal devices are mostly designed for fixed pipe diameters, only suitable for pipes with a single or small range of diameters. Faced with diverse pipe specifications in different engineering scenarios, frequent equipment replacement or structural adjustments are required. Therefore, this invention provides a pipe surface pretreatment rust removal device suitable for multiple pipe diameters.

[0006] The technical solution of this utility model is:

[0007] A pipe surface pretreatment and rust removal device suitable for multi-diameter pipes includes a hanger, a mounting beam, a left-side rotating clamp, a right-side rotating clamp, a T-shaped top frame, a threaded sleeve, a lead screw, and a rotating plate pressure roller;

[0008] The top of the hanger is fixedly connected to the bottom of the crossbeam as an integral structure. The hanger is rotatably connected to the left and right page rotating plates respectively, and the left and right page rotating plates are symmetrically arranged. The T-shaped top frame is set between the left and right page rotating plates. The T-shaped top frame is set inside the hanger, and the threaded sleeve has a threaded hole along the longitudinal direction. The lead screw is screwed into the threaded hole of the threaded sleeve through the threaded structure. When the lead screw rotates, it drives the threaded sleeve to move vertically up and down along the lead screw.

[0009] The rotating plate pressure rollers are symmetrically arranged on the T-shaped top frame. The rotating plate pressure rollers are rotatably connected to the T-shaped top frame. The rotating plate pressure rollers are used in conjunction with the left and right rotating clamping plates respectively. When the T-shaped top frame drives the rotating plate pressure rollers to move vertically up and down, the rotation angle between the left and right rotating clamping plates is changed to clamp pipes of different diameters.

[0010] Furthermore, it also includes columns and casters;

[0011] The number of columns is four, and the columns are made of square steel. The top of the columns is vertically fixed to the installation beam to form the main frame. The bottom of the columns is connected to casters, which drive the main frame to move.

[0012] Furthermore, it also includes the handwheel and the lead screw bearing housing;

[0013] The handwheel is connected to the lead screw, which is fixedly mounted on the inner ring surface of the lead screw bearing seat. The housing of the lead screw bearing seat is fixed on the mounting beam. A baffle is connected to the bottom of the lead screw. The lead screw rotates along the lead screw bearing seat. When the handwheel drives the lead screw to rotate, the threaded sleeve on the lead screw moves vertically up and down.

[0014] Furthermore, this also includes rust-removing wire wheels;

[0015] The rust-removing wire wheels are detachably rotatably connected to the bottom of the left page rotating clamp, the right page rotating clamp, and the T-shaped top frame, and the pipe is clamped between the rust-removing wire wheels on the left page rotating clamp, the right page rotating clamp, and the T-shaped top frame.

[0016] Furthermore, the left and right page rotating clamps have the same structure, and the left and right page rotating clamps are provided with holes for installing the rotating shaft. The upper part of the left and right page rotating clamps is located inside the hanger, and the lower part is located outside the hanger.

[0017] Furthermore, the hanger consists of a front cover and a rear cover, and a set of mounting holes are provided on the hanger, with a cavity structure in the middle of the hanger.

[0018] Furthermore, the base point rotation portion of the left and right page rotating clamps is located at the strip hole below the hanger, and the left and right page rotating clamps rotate within the length range of the strip hole, changing the distance between the lower ends of the left and right page rotating clamps.

[0019] Furthermore, the T-shaped top frame is composed of a horizontal frame and a vertical frame, which are an integral structure. The horizontal frame is located inside the hanger, and the bottom of the vertical frame is located outside the hanger.

[0020] Furthermore, the intersection of the transverse and longitudinal frames of the T-shaped top frame is fixedly connected to a threaded sleeve, which moves the T-shaped top frame when the threaded sleeve moves.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] This utility model is adaptable to multiple pipe diameters and has strong versatility. It drives the T-shaped top frame and rotating plate pressure roller to move through the screw-driven threaded sleeve. The rotation angle of the left and right rotating clamps can be flexibly adjusted to achieve stable clamping of pipes of different diameters. It can meet diverse rust removal needs without changing equipment and reduce construction costs.

[0023] This utility model is simple to operate and highly efficient. The screw can be driven to rotate by turning the handwheel, thereby completing the pipe diameter adaptation adjustment, simplifying the operation process. Rust-removing steel wire wheels are set on the left and right page clamps and the bottom of the T-shaped top frame, which can remove rust from the pipe surface from multiple directions at the same time, improving the efficiency and effect of rust removal.

[0024] This invention features three rust-removing wire wheels arranged in a triangular pattern, allowing simultaneous contact with the pipe surface from both sides and top, covering key areas along the pipe's circumference. Compared to grinding with a single wheel one by one, this significantly reduces the rust removal time for a single pipe, making it particularly suitable for batch pipe pretreatment on-site. It effectively improves overall construction efficiency, ensuring more thorough rust removal and a higher surface smoothness. When the triangularly arranged wire wheels contact the pipe, they create a stable clamping force. Combined with the angle adjustment of the left and right rotating plates, this firmly secures pipes of different diameters, preventing pipe displacement and shaking during rust removal. This improves rust removal accuracy and reduces operational risks. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the present invention;

[0026] Figure 2 This is a structural diagram illustrating the rust removal process for pipes of different diameters.

[0027] Figure 3 This is a structural diagram of the T-shaped top frame and the rotating plate pressure roller;

[0028] Figure 4 yes Figure 3 Top view;

[0029] Figure 5 yes Figure 1 A schematic diagram of the structure without the left and right page transfer clips installed.

[0030] Figure 6 This is a schematic diagram of the structure of this utility model;

[0031] In the diagram: 1. Hanger, 2. Mounting beam, 3. Left page rotating clamp, 4. Right page rotating clamp, 5. T-shaped top frame, 6. Threaded sleeve, 7. Lead screw, 8. Turning plate pressure roller, 9. Column, 10. Caster wheel, 11. Hand wheel, 12. Lead screw bearing seat, 13. Rust-removing steel wire wheel, 14. Pipe, 15. Strip hole, 16. Baffle;

[0032] 51. Horizontal frame; 52. Vertical frame. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0034] Specific implementation method one: Combining Figure 1 and Figure 2 This embodiment describes a pipe surface pretreatment and rust removal device suitable for multi-diameter pipes, including a hanger 1, a mounting beam 2, a left-side rotating clamp 3, a right-side rotating clamp 4, a T-shaped top frame 5, a threaded sleeve 6, a lead screw 7, and a rotating plate pressure roller 8.

[0035] The top of the hanger 1 is fixedly connected to the bottom of the crossbeam 2 as an integral structure. The hanger 1 is rotatably connected to the left page rotating clamp 3 and the right page rotating clamp 4 respectively, and the left page rotating clamp 3 and the right page rotating clamp 4 are symmetrically arranged. The T-shaped top frame 5 is set between the left page rotating clamp 3 and the right page rotating clamp 4. The T-shaped top frame 5 is set inside the hanger 1, and the threaded sleeve 6 has a threaded hole along the longitudinal direction. The lead screw 7 is screwed into the threaded hole of the threaded sleeve 6 through the threaded structure. When the lead screw 7 rotates, it drives the threaded sleeve 6 to move vertically up and down along the lead screw 7.

[0036] The rotating plate pressure rollers 8 are symmetrically arranged on the T-shaped top frame 5. The rotating plate pressure rollers 8 are rotatably connected to the T-shaped top frame 5. The rotating plate pressure rollers 8 are used in conjunction with the left page rotating clamping plate 3 and the right page rotating clamping plate 4 respectively. When the T-shaped top frame 5 drives the rotating plate pressure rollers 8 to move vertically up and down, the rotation angle between the left page rotating clamping plate 3 and the right page rotating clamping plate 4 is changed to clamp pipes of different diameters.

[0037] The core components of this embodiment include a hanger 1, a mounting beam 2, a left-side rotating clamp 3, a right-side rotating clamp 4, a T-shaped top frame 5, a threaded sleeve 6, a lead screw 7, and a rotating plate pressure roller 8. The top of the hanger 1 is fixedly connected to the bottom of the mounting beam 2, forming a stable integrated structure that provides basic support for the subsequent installation of components.

[0038] The hanger 1 is rotatably connected to the left page rotating clamp 3 and the right page rotating clamp 4 respectively, and the two are arranged symmetrically to ensure balanced force when the pipe is clamped.

[0039] The T-shaped top frame 5 is positioned between the left page turning plate 3 and the right page turning plate 4, and is located inside the hanger 1. Its position design allows for precise control of the angle adjustment of the plates.

[0040] The threaded sleeve 6 has a threaded hole along the longitudinal direction. The lead screw 7 is screwed into the threaded hole through the thread structure. When the lead screw 7 rotates, it will drive the threaded sleeve 6 to move up and down in the vertical direction along the lead screw 7 through the thread transmission.

[0041] The rotating pressure rollers 8 are symmetrically mounted on the T-shaped top frame 5 and maintain a rotatable connection with the T-shaped top frame 5 to ensure reduced component wear during adjustment. The rotating pressure rollers 8 are used in conjunction with the left page rotating clamping plate 3 and the right page rotating clamping plate 4 respectively. When the T-shaped top frame 5 drives the rotating pressure rollers 8 to move vertically up and down, it will push the left page rotating clamping plate 3 and the right page rotating clamping plate 4 to rotate around their connection point, thereby changing the rotation angle between them and ultimately achieving stable clamping of pipes of different diameters.

[0042] Specific Implementation Method Two: Combining Figure 1 and Figure 2 This embodiment describes a pipe surface pretreatment and rust removal device suitable for multi-diameter pipes, which also includes a column 9 and casters 10.

[0043] There are four columns 9, and the columns 9 are made of square steel. The top of each column 9 is vertically and fixedly connected to the mounting beam 2 to form the main frame. The bottom of each column 9 is connected to casters 10, which drive the main frame to move. This ensures that the main frame can move flexibly.

[0044] Four uprights 9 are installed, constructed of square steel, possessing high strength and good stability, effectively supporting the overall weight of the device. The bottom of the uprights 9 is connected to casters 10. Utilizing the flexible steering and rolling characteristics of the casters 10, the entire main frame can be moved freely, breaking through the limitations of traditional fixed-installation rust removal devices. This facilitates adjustment of the working position in outdoor and complex construction environments, improving the convenience and flexibility of construction.

[0045] Specific implementation method three: Combining Figure 1 and Figure 2 This embodiment describes a pipe surface pretreatment and rust removal device suitable for multi-diameter pipes, which also includes a handwheel 11 and a lead screw bearing seat 12.

[0046] The handwheel 11 is connected to the lead screw 7, which is fixedly mounted on the inner ring surface of the lead screw bearing seat 12. The housing of the lead screw bearing seat 12 is fixed on the mounting beam 2. A baffle 16 is connected to the bottom of the lead screw 7. The lead screw 7 rotates along the lead screw bearing seat 12. When the handwheel 11 drives the lead screw 7 to rotate, the threaded sleeve 6 on the lead screw 7 moves vertically up and down.

[0047] The handwheel 11 is directly connected to the lead screw 7, serving as the core component for manual operation, allowing operators to control the movement of the lead screw 7 by manual rotation. The lead screw 7 is fixedly mounted on the inner ring surface of the lead screw bearing seat 12, while the housing of the lead screw bearing seat 12 is fixed on the mounting beam 2. This achieves stable installation of the lead screw 7 and reduces frictional resistance during rotation, ensuring smooth rotation.

[0048] A baffle 16 is connected to the bottom of the lead screw 7, which can effectively limit the movement range of the threaded sleeve 6, prevent the threaded sleeve 6 from falling off the bottom of the lead screw 7, and improve the safety of the device.

[0049] When the operator turns the handwheel 11, it will drive the lead screw 7 to rotate along the lead screw bearing seat 12. Since the lead screw 7 and the threaded sleeve 6 are engaged by the thread structure, the rotation of the lead screw 7 will drive the threaded sleeve 6 to move vertically up and down along the lead screw 7, thereby realizing the subsequent position adjustment of the T-shaped top frame 5 and the rotating plate pressure roller 8.

[0050] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment describes a pipe surface pretreatment and rust removal device suitable for multi-diameter pipes, which also includes a rust removal wire wheel 13.

[0051] The rust-removing wire wheel 13 is detachably connected to the bottom of the left page rotating clamp 3, the right page rotating clamp 4 and the T-shaped top frame 5, and the pipe 14 is clamped between the rust-removing wire wheels 13 on the left page rotating clamp 3, the right page rotating clamp 4 and the T-shaped top frame 5.

[0052] The rust-removing wire wheels 13 are detachably installed, rotatably connecting to the bottom of the left page rotating clamp 3, the right page rotating clamp 4, and the T-shaped top frame 5. In actual use, a clamping space is formed between the rust-removing wire wheels 13 on the left page rotating clamp 3, the right page rotating clamp 4, and the T-shaped top frame 5. The rust-removing pipe 14 is placed within this space, ensuring that the pipe surface of the pipe 14 is tightly fitted with the three rust-removing wire wheels 13. Through the rotation of the rust-removing wire wheels 13, rust removal can be performed on the pipe surface of the pipe 14 simultaneously from multiple directions, effectively improving rust removal efficiency and effect, and avoiding incomplete rust removal.

[0053] Specific Implementation Method Five: Combining Figure 1 and Figure 2This embodiment describes a rust removal device for pretreatment of pipe surfaces in multi-diameter pipes. The left and right rotating clamps 3 and 4 have the same structure, and holes for mounting a rotating shaft are provided on the left and right rotating clamps 3 and 4. The upper parts of the left and right rotating clamps 3 and 4 are located inside the hanger 1, and the lower parts are located outside the hanger 1.

[0054] Specific Implementation Method Six: Combination Figure 1 and Figure 2 This embodiment describes a rust removal device for pretreatment of pipe surfaces suitable for multi-diameter pipes. The hanger 1 consists of a front cover and a rear cover, and a set of mounting holes are provided on the hanger 1. The middle of the hanger 1 is a cavity structure.

[0055] The hanger 1 is composed of a front cover and a rear cover. This modular structure facilitates the installation, disassembly, and maintenance of subsequent components, reducing maintenance difficulty. A set of mounting holes is provided on the hanger 1 for fastening the front and rear covers together, ensuring precise and secure installation of each component. The middle of the hanger 1 is a cavity structure, which provides installation and movement space for internal components such as the T-shaped top frame 5 and the rotating plate pressure roller 8, preventing interference between components and ensuring smooth overall operation of the device.

[0056] Specific implementation method seven: Combining Figure 1 and Figure 2 This embodiment describes a rust removal device for pretreatment of pipe surfaces in multi-diameter pipes. The base point rotation portion of the left and right rotating clamps 3 and 4 is located at the strip hole 15 below the hanger 1, and the left and right rotating clamps 3 and 4 rotate within the length range of the strip hole 15, changing the distance between the lower ends of the left and right rotating clamps 3 and 4.

[0057] The base rotation points of the left-page rotating clamp 3 and the right-page rotating clamp 4 are located at the slotted hole 15 below the hanger 1, providing a reasonable range of motion for the clamp rotation. The left-page rotating clamp 3 and the right-page rotating clamp 4 can rotate freely within the length of the slotted hole 15. By adjusting the distance between their lower ends through rotation, they can accommodate pipes 14 of different diameters. This design ensures both the flexibility of the clamp rotation and limits the rotation angle through the slotted hole 15.

[0058] Specific implementation method eight: Combination Figure 1 and Figure 2 This embodiment describes a pipe surface pretreatment and rust removal device suitable for multi-diameter pipes. The T-shaped top frame 5 consists of a horizontal frame 51 and a vertical frame 52, which are an integral structure. The horizontal frame 51 is installed inside the hanger 1, and the bottom of the vertical frame 52 is installed on the outside of the hanger 1.

[0059] Specific Implementation Method Nine: Combining Figure 1 and Figure 2 This embodiment describes a rust removal device for pretreatment of pipe surfaces in multi-diameter pipes. The intersection of the transverse frame 51 and the longitudinal frame 52 of the T-shaped top frame 5 is fixedly connected to the threaded sleeve 6. When the threaded sleeve 6 moves, it drives the T-shaped top frame 5 to move.

[0060] Working principle:

[0061] Pipe diameter adaptation adjustment: According to the pipe diameter of the pipe 14 to be derusted, turn the handwheel 11. The handwheel 11 drives the screw 7 to rotate along the screw bearing seat 12. Since the screw 7 and the threaded sleeve 6 are connected by a threaded structure, when the screw 7 rotates, it will drive the threaded sleeve 6 to move vertically up and down along the screw 7, thereby driving the T-shaped top frame 5 and the rotating plate pressure roller 8, which are fixedly connected to the threaded sleeve 6, to move up and down synchronously.

[0062] Pipe clamping and fixing: When the rotating plate pressure roller 8 moves up and down, it will push the left page rotating clamp 3 and the right page rotating clamp 4 to rotate around their axis within the range of the strip hole 15 below the hanger 1, thereby changing the distance between the lower ends of the left page rotating clamp 3 and the right page rotating clamp 4, so that the left page rotating clamp 3, the right page rotating clamp 4 and the rust-removing wire wheel 13 at the bottom of the T-shaped top frame 5 form a clamping space that matches the diameter of the pipe 14 to be rusted. The pipe 14 is placed in this space to ensure that the pipe 14 is tightly fitted with the three rust-removing wire wheels 13, thus completing the pipe clamping and fixing.

[0063] Movement and rust removal operation: By pushing the main frame, the device is moved above the welding roller frame using the casters 10 at the bottom. The welding roller frame drives the pipe to rotate, so that the three rust removal wire wheels 13 simultaneously and slowly push the device to move along the length of the pipe 14, so as to achieve all-round and efficient rust removal on the surface of the pipe 14.

[0064] Subsequent maintenance and adjustment: When the rust removal wire wheel 13 is severely worn, it can be directly disassembled and replaced; if rust removal is required for pipes of different diameters, repeat steps 1-3 without disassembling other parts.

[0065] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present utility model's technical solution, based on the technical essence of the present utility model and within the spirit and principles of the present utility model, shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A pretreatment and rust removal device for pipe surfaces of multiple diameters, characterized in that, Includes hanger (1), mounting beam (2), left page rotating clamp (3), right page rotating clamp (4), T-shaped top frame (5), threaded sleeve (6), lead screw (7) and rotating plate pressure roller (8); The top of the hanger (1) is fixedly connected to the bottom of the crossbeam (2) as an integral structure. The hanger (1) is rotatably connected to the left page rotating clamp (3) and the right page rotating clamp (4) respectively, and the left page rotating clamp (3) and the right page rotating clamp (4) are arranged symmetrically. The T-shaped top frame (5) is set between the left page rotating clamp (3) and the right page rotating clamp (4). The T-shaped top frame (5) is set inside the hanger (1), and the threaded sleeve (6) has a threaded hole along the longitudinal direction. The screw (7) is screwed into the threaded hole of the threaded sleeve (6) through the threaded structure. When the screw (7) rotates, it drives the threaded sleeve (6) to move vertically up and down along the screw (7). The rotating plate pressure roller (8) is symmetrically arranged on the T-shaped top frame (5). The rotating plate pressure roller (8) is rotatably connected to the T-shaped top frame (5). The rotating plate pressure roller (8) is used in conjunction with the left page rotating clamp (3) and the right page rotating clamp (4). When the T-shaped top frame (5) drives the rotating plate pressure roller (8) to move vertically up and down, the rotation angle between the left page rotating clamp (3) and the right page rotating clamp (4) is changed to clamp pipes of different diameters.

2. The pipe surface pretreatment and rust removal device suitable for multi-diameter pipes according to claim 1, characterized in that, It also includes a column (9) and casters (10); The number of columns (9) is four, and the columns (9) adopt a square steel structure. The top of the columns (9) is vertically fixedly connected to the installation beam (2) to form the main frame. The bottom of the columns (9) is connected to the casters (10), and the casters (10) drive the main frame to move.

3. The pipe surface pretreatment and rust removal device suitable for multi-diameter pipes according to claim 1, characterized in that, It also includes a handwheel (11) and a lead screw bearing housing (12); The handwheel (11) is connected to the lead screw (7). The lead screw (7) is fixedly mounted on the inner ring surface of the lead screw bearing seat (12). The housing of the lead screw bearing seat (12) is fixed on the mounting beam (2). A baffle (16) is connected to the bottom of the lead screw (7). The lead screw (7) rotates along the lead screw bearing seat (12). When the handwheel (11) drives the lead screw (7) to rotate, the threaded sleeve (6) on the lead screw (7) moves vertically up and down.

4. The pipe surface pretreatment and rust removal device suitable for multi-diameter pipes according to claim 1, characterized in that, It also includes rust-removing wire wheels (13); The rust-removing wire wheel (13) is detachably connected to the bottom of the left page rotating clamp (3), the right page rotating clamp (4) and the T-shaped top frame (5), and the pipe (14) is clamped between the rust-removing wire wheel (13) on the left page rotating clamp (3), the right page rotating clamp (4) and the T-shaped top frame (5).

5. The pipe surface pretreatment and rust removal device suitable for multi-diameter pipes according to claim 4, characterized in that, The left page turning plate (3) and the right page turning plate (4) have the same structure, and the left page turning plate (3) and the right page turning plate (4) are provided with holes for installing the rotating shaft. The upper part of the left page turning plate (3) and the right page turning plate (4) are set inside the hanger (1), and the lower part is set outside the hanger (1).

6. The pipe surface pretreatment and rust removal device suitable for multi-diameter pipes according to claim 5, characterized in that, The hanger (1) consists of a front cover and a rear cover, and a set of mounting holes are provided on the hanger (1). The middle of the hanger (1) is a cavity structure.

7. The pipe surface pretreatment and rust removal device suitable for multi-diameter pipes according to claim 5, characterized in that, The base point rotation part of the left page rotating clamp (3) and the right page rotating clamp (4) is set at the strip hole (15) below the hanger (1), and the left page rotating clamp (3) and the right page rotating clamp (4) rotate within the length range of the strip hole (15) to change the distance between the lower ends of the left page rotating clamp (3) and the right page rotating clamp (4).

8. The pipe surface pretreatment and rust removal device suitable for multi-diameter pipes according to claim 1, characterized in that, The T-shaped top frame (5) consists of a horizontal frame (51) and a vertical frame (52). The horizontal frame (51) and the vertical frame (52) are an integral structure. The horizontal frame (51) is set inside the hanger (1), and the bottom of the vertical frame (52) is set outside the hanger (1).

9. The pipe surface pretreatment and rust removal device suitable for multi-diameter pipes according to claim 8, characterized in that, The T-shaped top frame (5) is fixedly connected to the threaded sleeve (6) at the intersection of the horizontal frame (51) and the vertical frame (52). When the threaded sleeve (6) moves, it drives the T-shaped top frame (5) to move.

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