Rust removal device for pressure steel pipe production

Abstract

The invention belongs to the technical field of steel pipe production, and discloses a pressure steel pipe acting rust removal device which comprises a base and a steel pipe. Through cooperation of structures such as rust removal assemblies II and a flow guide assembly, the flow guide assembly communicates with the air outlet end of an air pump, air is exhausted outwards through an arc-shaped pipe, the multiple rust removal assemblies II are pushed according to the pressure of airflow, a steel brush II rotates to rub the inner wall of a steel pipe, rust is separated, and the flow guide assembly and the rust removal assemblies II are pushed to move; rust on the inner wall of a steel pipe can be better removed, the labor cost in a factory is reduced, the rust removal time of workers is shortened, according to the Bernoulli principle, the pressure difference enables the end of a flow guide pipe obliquely inserted into an arc-shaped pipe to generate suction force, powder scratched by a second steel brush is sucked to a material filtering plate on a wooden handle and a plurality of filtering plates, and dust on the inner wall of the steel pipe is removed. The rust is prevented from returning to the interior of the steel pipe, and meanwhile, the subsequent cleaning time of workers is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of steel pipe production, and specifically relates to a rust removal device for manufacturing pressure steel pipes. Background Art

[0002] A pressure steel pipe is a type of pipe used to withstand internal or external pressure, and it is usually applied in water conservancy projects, the oil and natural gas industries, the chemical industry, and the power industry, etc. Anticorrosive paint is also sprayed on the inner and outer walls of the steel pipe to improve the service life of the steel pipe. However, during the waiting time for spraying the steel pipe, it may develop rust due to humid air and mechanical damage during transportation, and this rust will directly affect the subsequent spraying work. Therefore, before spraying, it is necessary to manually inspect the steel pipe.

[0003] It should be noted that the internal stress generated during the rolling or welding of the steel pipe may concentrate at the ends, and the structure at the weld is uneven, making it prone to becoming a "weak point" for corrosion. Rust may extend along the weld. Since the inner diameter value of some pipelines is small, the internal space is not sufficient for operators to perform rapid rust removal work such as polishing. The narrow internal space of the steel pipe may also prevent workers from freely moving their hands and feet to pick up rust removal tools, thereby reducing the production efficiency of the steel pipe. For this reason, we provide a rust removal device for manufacturing pressure steel pipes. Summary of the Invention

[0004] To solve the problems raised in the above background art, the invention provides a rust removal device for manufacturing pressure steel pipes, which solves the problems that operators cannot perform rapid rust removal work inside the steel pipe and that it also prevents workers from freely moving their hands and feet to pick up rust removal tools.

[0005] To achieve the above object, the invention provides the following technical solution: A rust removal device for manufacturing pressure steel pipes, including a base and a steel pipe, and further including;

[0006] A positioning component disposed on the side of the base;

[0007] A diversion component clamped on the base;

[0008] A plurality of rust removal components two circumferentially and equiangularly installed on the outer periphery of the diversion component;

[0009] The rust removal component two includes a protection block elastically connected to the diversion component through a spring piece two. An arc-shaped pipe communicating with the inside of the diversion component is installed inside the protection block. The air outlet end of the arc-shaped pipe faces the inner wall of the steel pipe. The vertical part of the arc-shaped pipe is obliquely connected to a diversion pipe. Filter plates are equidistantly installed inside the diversion pipe. A steel brush two is connected to the top of the protection block through a wooden handle, and the top of the diversion pipe is communicated with the inside of the wooden handle;

[0010] The outer periphery of each of the steel brushes is supported by a steel pipe;

[0011] The positioning assembly is used to support the end of the steel pipe;

[0012] Two limit assemblies symmetrically arranged inside the base;

[0013] A rust removal component 1 is installed together with the limiting component, and the guide component is used to inject air into the arc tube.

[0014] Preferably, a filter plate is provided on the top of the wooden handle, the second steel brush is mounted on the filter plate, and an opening is provided on the side of the wooden handle, which is sealed by a nut and a cover plate.

[0015] Preferably, the flow guide assembly includes a transfer box, the second spring sheet is installed on the transfer box, the arc tube is movably sleeved on the transfer box and is connected to the inside of the transfer box, the outside of the transfer box is connected to a metal tube, the end of the metal tube is rotatably sleeved with a sealing sleeve, and the sealing sleeve is connected to the output end of the air pump through a rubber tube.

[0016] Preferably, a bracket is installed on the outer periphery of the metal tube, and the rust removal component includes a limit plate installed on the bracket, and a guide plate is installed on the limit plate for circular equal-angle sliding. A steel brush is provided at the bottom of the guide plate, and the track on the side of the limit plate for the guide plate to slide is facing the axis of the steel tube, and every two adjacent steel brushes are elastically connected by a spring sheet.

[0017] Preferably, the limit assembly includes a limit shaft fixedly mounted inside the base, a metal rod is wound around the outer circumference of the limit shaft, the outer circumference of the limit shaft is threadedly connected to the limit plate, the two ends of the metal rod are respectively supported on the inner wall of the base and the side of the limit plate, and the rust removal assembly also includes two brackets movably clamped on the edge of the limit plate, each of the brackets is rotatably connected to a guide cylinder, the two guide cylinders are transmission-connected to the guide plate through a transmission belt, and the inner wall of the guide cylinder is rotatably mounted on the outer circumference of the limit shaft through a plurality of metal plates arranged at equal angles in a circumferential direction.

[0018] Preferably, the metal rod is made of high-strength steel, the metal rod is spiral-shaped and the metal plate is inserted in the threaded seam.

[0019] Preferably, the positioning assembly includes a positioning plate movably clamped on the side of the base, a support plate is rotatably installed on the outer side of the positioning plate, and a plurality of support blocks are rotatably installed on the side of the positioning plate at equal angles, one side of the support block is slidably installed on the side of the support plate, and the other side of the support block is supported on the inner wall of the steel pipe.

[0020] Preferably, the side of the support block that is slidably connected to the support plate is vertical, and the other side of the support block is in the shape of a water droplet with a rounded end.

[0021] Preferably, the positioning assembly further includes a clockwork spring. The outer side of the positioning plate is elastically connected to the support plate through the clockwork spring, and a rotatable knob cover is installed on the outer side of the support plate.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] Through the cooperation of structures such as the rust removal assembly II and the diversion assembly, the present invention connects the diversion assembly to the air outlet end of the air pump, and the gas is discharged outward through the arc-shaped pipe. Several rust removal assemblies II are pushed according to the air flow pressure, and the steel brush II rotates and rubs against the inner wall of the steel pipe, causing the rust to fall off. The diversion assembly and the rust removal assembly II are pushed to move, which can better remove the rust on the inner wall of the steel pipe, reduce the labor cost in the factory and the rust removal time of the staff. According to Bernoulli's principle, the pressure difference causes suction at the end of the diversion pipe obliquely inserted on the arc-shaped pipe, and the powder scraped by the steel brush II is sucked onto the filter plate on the wooden handle and several filter plates, preventing the rust from returning to the inside of the steel pipe again, and at the same time reducing the subsequent cleaning time of the workers.

[0024] Through the cooperation of structures such as the rust removal assembly I and the rust removal assembly II, when the steel pipe is in the working position, the steel brush I closely adheres to the outside of the steel pipe, and the steel brush II closely adheres to the inner wall of the steel pipe. When the steel brush II is pushed by air pressure to rotate, it drives the limiting plate to rotate through the diversion assembly and the bracket. At this time, the steel brush I can scrape and remove the rust on the outside of the steel pipe, thus further shortening the rust removal time of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the external structure of the present invention;

[0026] Figure 2 is a schematic diagram of the internal structure of the base of the present invention;

[0027] Figure 3 is a schematic diagram of the internal structure of the steel pipe of the present invention;

[0028] Figure 4 is a schematic diagram of the structural cooperation between the diversion assembly and the rust removal assembly II of the present invention;

[0029] Figure 5 is a schematic diagram of the structural cooperation between the rust removal assembly II and the rust removal assembly I of the present invention;

[0030] Figure 6 is a schematic diagram of the structural cooperation between the diversion pipe and the arc-shaped pipe of the present invention;

[0031] Figure 7Schematic diagram of the structural cooperation between rust removal component 1 and rust removal component 2 of the present invention;

[0032] Figure 8 Schematic diagram of the structural cooperation between the guiding cylinder and the wooden handle of the present invention;

[0033] Figure 9 Schematic diagram of the structural cooperation between the positioning plate and the base of the present invention;

[0034] Figure 10 Schematic diagram of the structural cooperation between the support plate and the support block of the present invention.

[0035] In the figure: 1. Base; 2. Steel pipe; 3. Rust removal component 1; 31. Limit plate; 32. Guide plate; 33. Steel brush 1; 34. Spring piece 1; 35. Bracket; 36. Guiding cylinder; 37. Transmission belt; 4. Limit component; 41. Limit shaft; 42. Metal rod; 5. Positioning component; 51. Positioning plate; 52. Support plate; 53. Hairspring; 54. Support block; 6. Diversion component; 61. Transfer box; 62. Sealing sleeve; 63. Metal pipe; 7. Rust removal component 2; 71. Protection block; 72. Wooden handle; 73. Steel brush 2; 74. Arc-shaped pipe; 75. Diversion pipe; 76. Filter plate; 77. Spring piece 2; 8. Bracket. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] As Figures 1 to 8 shown, the present invention provides a rust removal device for the production of pressure steel pipes, including a base 1 and a steel pipe 2, characterized in that: it further includes;

[0038] A positioning component 5 arranged on the side of the base 1;

[0039] A diversion component 6 clamped on the base 1;

[0040] A plurality of rust removal components 2 7 circumferentially and equiangularly installed on the outer periphery of the diversion component 6;

[0041] The rust removal component II 7 includes a protection block 71 elastically connected to the diversion component 6 through a spring piece II 77. An arc-shaped pipe 74 communicating with the inside of the diversion component 6 is installed inside the protection block 71. The air outlet end of the arc-shaped pipe 74 faces the inner wall of the steel pipe 2. A diversion pipe 75 is obliquely connected to the vertical part of the arc-shaped pipe 74. Filter plates 76 are installed at equal intervals inside the diversion pipe 75. A second steel brush 73 is connected to the top of the protection block 71 through a wooden handle 72. The top of the diversion pipe 75 communicates with the inside of the wooden handle 72;

[0042] The outer periphery of each second steel brush 73 propping against the steel pipe 2;

[0043] The positioning component 5 is used to prop against the end of the steel pipe 2;

[0044] Two limiting components 4 symmetrically arranged inside the base 1;

[0045] The rust removal component I 3 jointly installed on the limiting component 4, and the diversion component 6 is used to inject air into the arc-shaped pipe 74.

[0046] A filter material plate is arranged at the top of the wooden handle 72. The second steel brush 73 is installed on the filter material plate. An opening is arranged on the side of the wooden handle 72, and the opening is sealed by a nut and a cover plate.

[0047] Adopting the above scheme: Connect the diversion component 6 to the air outlet end of the air pump. The gas is discharged outward through the arc-shaped pipe 74. Since the air outlet end of the arc-shaped pipe 74 faces the inner wall of the steel pipe 2, and several rust removal components II 7 are respectively arranged at equal angles circumferentially on the outer periphery of the diversion component 6, several rust removal components II 7 can be pushed by the pressure of the air flow. At this time, the second steel brush 73 will rotate and rub against the inner wall of the steel pipe 2. By pushing the diversion component 6 to displace, the rust removal component II 7 also moves forward, so as to remove the rust on the inner wall of the steel pipe 2. And because the storage time of the steel pipe 2 in the factory is not long and the rust on it is not serious, the second steel brush 73 can relatively easily handle the iron rust, thereby reducing the labor cost in the factory and the rust removal time of the staff. Further, according to Bernoulli's principle:

[0048] When the arc-shaped pipe 74 quickly discharges air outward, the air flow velocity inside the arc-shaped pipe 74 is greater than the air flow velocity inside the diversion pipe 75. The pressure difference generated by the two makes the end of the diversion pipe 75 obliquely inserted on the arc-shaped pipe 74 generate suction. The suction is transmitted to the second steel brush 73 through the outer chamber of the wooden handle 72 and the filter material plate. The powder scraped by the second steel brush 73 will be sucked to the filter material plate on the wooden handle 72. Further, the extracted air will also pass through several filter plates 76, so that the rust powder is adsorbed again, and at the same time, it prevents the iron rust from returning to the inside of the steel pipe 2 again, and also reduces the subsequent cleaning time of the workers.

[0049] As Figures 1 - 4As shown, the diversion assembly 6 includes a transfer box 61. The second spring piece 77 is installed on the transfer box 61. The arc-shaped pipe 74 is movably sleeved on the transfer box 61 and is communicated with the inside of the transfer box 61. A metal pipe 63 is communicated with the outside of the transfer box 61. A sealing sleeve 62 is rotatably sleeved at the end of the metal pipe 63. The sealing sleeve 62 is connected to the output end of the air pump through a rubber pipe.

[0050] With the above solution: Connect the sealing sleeve 62 to the air outlet end of the air pump. Workers can push the transfer box 61 and the second rust removal assembly 7 thereon through the metal pipe 63, so as to ensure that all rust stains existing on the inner wall of the steel pipe 2 can be brushed off by the second steel brush 73.

[0051] As Figures 1 - 6 As shown, a bracket 8 is installed on the outer periphery of the metal pipe 63. The first rust removal assembly 3 includes a limiting plate 31 installed on the bracket 8. Guide plates 32 are slidably installed on the limiting plate 31 at equal angles in the circumferential direction. A first steel brush 33 is arranged at the bottom of the guide plate 32. The track for the guide plate 32 to slide on the side of the limiting plate 31 faces the axis of the steel pipe 2. Every two adjacent first steel brushes 33 are elastically connected by a first spring piece 34.

[0052] With the above solution: After the steel pipe 2 is in the working position, the first spring piece 34 tightens the first steel brush 33 to make it close to the outside of the steel pipe 2, and the second steel brush 73 is close to the inner wall of the steel pipe 2. When the second steel brush 73 is pushed by air pressure to rotate, it drives the limiting plate 31 to rotate through the transfer box 61, the metal pipe 63 and the bracket 8. At this time, the first steel brush 33 can scrape the outside of the steel pipe 2 and remove rust stains, thus further shortening the rust removal time of the staff.

[0053] As Figures 1 - 8 As shown, the limiting assembly 4 includes a limiting shaft 41 fixedly installed inside the base 1. A metal rod 42 is wound around the outer periphery of the limiting shaft 41. A limiting piece 43 is threadedly connected to the outer periphery of the limiting shaft 41. The two ends of the metal rod 42 respectively abut against the inner wall of the base 1 and the side surface of the limiting piece 43. The first rust removal assembly 3 further includes two brackets 35 movably clamped at the edge of the limiting plate 31. A guide cylinder 36 is rotatably connected to each of the brackets 35. The two guide cylinders 36 are in transmission connection with the guide plate 32 through a transmission belt 37. The inner wall of the guide cylinder 36 is rotatably installed on the outer periphery of the limiting shaft 41 through a plurality of metal plates arranged at equal angles in the circumferential direction.

[0054] The metal rod 42 is made of high-strength steel. The metal rod 42 is spiral-shaped and the metal plates are inserted into the thread grooves.

[0055] Adopting the above solution: When the guide plate 32 rotates around the steel pipe 2, it drives the two guide cylinders 36 to rotate in the same direction through the transmission belt 37. Each guide cylinder 36 can be smoothly displaced through the metal plate on its inner wall and the spiral metal rod 42. The guide cylinder 36 drives the limit plate 31 and the guide plate 32 thereon to move through the bracket 35. The limit plate 31 drives the rust removal assembly 7 to rotate and displace through the bracket 8 and the diversion assembly 6, thereby improving the efficiency and effect of rust removal;

[0056] More preferably, the spiral metal rod 42 can be replaced by a thread groove opened on the limit shaft 41 to improve the stability of the device.

[0057] As Figures 1 - 10 shown, the positioning assembly 5 includes a positioning plate 51 movably clamped to the side of the base 1. A support plate 52 is rotatably installed on the outside of the positioning plate 51. A plurality of support blocks 54 are circumferentially and equally angularly rotatably installed on the side of the positioning plate 51. One side of the support block 54 is slidably installed on the side of the support plate 52, and the other side of the support block 54 abuts against the inner wall of the steel pipe 2.

[0058] The side of the support block 54 slidably connected to the support plate 52 is vertical, and the other side of the support block 54 is in a water droplet shape and the end is arc-shaped.

[0059] The positioning assembly 5 further includes a hairspring 53. The outside of the positioning plate 51 is elastically connected to the support plate 52 through the hairspring 53. A knob cover for rotation is installed on the outside of the support plate 52.

[0060] Adopting the above solution: When the steel pipe 2 is in the working position, its own weight presses on the support block 54 through the inner wall, which makes the position of the steel pipe 2 fixed. The hairspring 53 always keeps the position of the support plate 52 able to hold the support block 54 on the inner wall of the steel pipe 2. When the rust removal work is completed, by rotating the support plate 52 through the knob cover, the hairspring 53 can be tightened, and each support block 54 rotates. The steel pipe 2 is no longer fixed. Pull the positioning plate 51 so that it no longer clings to the side of the steel pipe 2, and the staff can take out the steel pipe 2, which makes the device applicable to steel pipes 2 with different inner diameter values and can also take out or place the steel pipe 2 more conveniently.

[0061] The working principle and usage process of the present invention:

[0062] Connect the metal pipe 63 to the air outlet end of the air pump, and the gas is discharged outward through the arc-shaped pipe 74. Several rust removal assemblies II 7 can be pushed by the pressure of the air flow, and the steel brush II 73 will rotate and rub the inner wall of the steel pipe 2 to remove rust.

[0063] When the arc-shaped tube 74 quickly discharges air outward, the air flow rate inside the arc-shaped tube 74 is greater than that inside the diversion tube 75. The pressure difference generated by the two causes suction at the end of the diversion tube 75 obliquely inserted on the arc-shaped tube 74. The suction is transmitted to the second steel brush 73 through the outer chamber of the wooden handle 72 and the filter plate. The powder scraped by the second steel brush 73 will be sucked onto the filter plate on the wooden handle 72;

[0064] The filter plate can be replaced with non-woven fabric.

[0065] The second neodymium magnet 78 is close to the first neodymium magnet 38, and there is an attractive force between the two, which makes the first steel brush 33 closely adhere to the outside of the steel pipe 2, and the second steel brush 73 closely adhere to the inner wall of the steel pipe 2. When the second steel brush 73 is pushed by air pressure to rotate, it drives the limit plate 31 to rotate through the transfer box 61, the metal pipe 63 and the bracket 8. At this time, the first steel brush 33 can scrape the outside of the steel pipe 2 and remove rust.

[0066] When the guide plate 32 rotates around the steel pipe 2, it drives the two guide cylinders 36 to rotate in the same direction through the transmission belt 37. Each guide cylinder 36 moves smoothly through the metal plate and the metal rod 42 on its inner wall, and the second rust removal assembly 7 also moves;

[0067] When the rust removal work is completed, by rotating the support plate 52 through the knob cover, the clockwork spring 53 can be tightened, and each support block 54 rotates. The steel pipe 2 is no longer fixed. Pull the positioning plate 51 so that it no longer closely adheres to the side of the steel pipe 2, and the staff can take out the steel pipe 2.

[0068] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0069] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure steel pipe rust removal device, comprising a base (1) and a steel pipe (2), characterized in that: Also includes; A positioning assembly (5) disposed on a side of the base (1); A flow guide assembly (6) clamped on the base (1); A plurality of rust removal components (7) are installed at equal angles in the annular direction on the outer periphery of the guide component (6); The second rust removal component (7) comprises a protection block (71) elastically connected to the guide component (6) through a second spring sheet (77); an arc tube (74) connected to the inside of the guide component (6) is installed inside the protection block (71); the air outlet end of the arc tube (74) faces the inner wall of the steel pipe (2); the vertical part of the arc tube (74) is obliquely connected to a guide tube (75); filter plates (76) are equidistantly installed inside the guide tube (75); the top of the protection block (71) is connected to a second steel brush (73) through a wooden handle (72); the top of the guide tube (75) is connected to the inside of the wooden handle (72); The outer periphery of each of the second steel brushes (73) is supported by a steel pipe (2); The positioning assembly (5) is used to support the end of the steel pipe (2); Two limit assemblies (4) symmetrically arranged inside the base (1); A rust removal component (3) is installed together with the limiting component (4), and the flow guide component (6) is used to inject air into the arc tube (74).

2. The pressure steel pipe rust removal device according to claim 1 is characterized in that: A filter plate is arranged on the top of the wooden handle (72), and the second steel brush (73) is mounted on the filter plate. An opening is arranged on the side of the wooden handle (72), and the opening is sealed by a nut and a cover plate.

3. The pressure steel pipe rust removal device according to claim 2 is characterized in that: The flow guide assembly (6) comprises a transfer box (61), the second spring sheet (77) is mounted on the transfer box (61), the arc tube (74) is movably sleeved on the transfer box (61) and is connected to the inside of the transfer box (61), the outer side of the transfer box (61) is connected to a metal tube (63), the end of the metal tube (63) is rotatably sleeved with a sealing sleeve (62), and the sealing sleeve (62) is connected to the output end of the air pump through a rubber tube.

4. The pressure steel pipe rust removal device according to claim 3 is characterized in that: A bracket (8) is installed on the outer periphery of the metal tube (63), and the rust removal component (3) includes a limit plate (31) installed on the bracket (8), a guide plate (32) is installed on the limit plate (31) to slide at an equal angle in an annular direction, a steel brush (33) is arranged at the bottom of the guide plate (32), and a track on the side of the limit plate (31) for the guide plate (32) to slide is oriented toward the axis of the steel tube (2), and every two adjacent steel brushes (33) are elastically connected by a spring sheet (34).

5. The pressure steel pipe rust removal device according to claim 4 is characterized in that: The limiting assembly (4) comprises a limiting shaft (41) fixed inside the base (1), a metal rod (42) is wound around the outer circumference of the limiting shaft (41), the outer circumference of the limiting shaft (41) is threadedly connected to the limiting plate (43), and the two ends of the metal rod (42) are respectively supported on the inner wall of the base (1) and the side of the limiting plate (43), and the rust removal assembly (3) also comprises two brackets (35) movably connected to the edge of the limiting plate (31), each of the brackets (35) is rotatably connected to a guide cylinder (36), and the two guide cylinders (36) are transmission-connected to the guide plate (32) through a transmission belt (37), and the inner wall of the guide cylinder (36) is rotatably mounted on the outer circumference of the limiting shaft (41) through a plurality of metal plates arranged at equal angles in a circumferential direction.

6. The pressure steel pipe rust removal device according to claim 5, characterized in that: The metal rod (42) is made of high-strength steel, the metal rod (42) is spiral-shaped, and the metal plate is inserted in the thread seam.

7. The pressure steel pipe rust removal device according to claim 6 is characterized in that: The positioning assembly (5) comprises a positioning plate (51) movably clamped on the side of the base (1); a support plate (52) is rotatably mounted on the outer side of the positioning plate (51); a plurality of support blocks (54) are rotatably mounted on the side of the positioning plate (51) at equal angles; one side of the support block (54) is slidably mounted on the side of the support plate (52); and the other side of the support block (54) is supported on the inner wall of the steel pipe (2).

8. The pressure steel pipe rust removal device according to claim 7, characterized in that: One side of the support block (54) that is slidably connected to the support plate (52) is vertical, and the other side of the support block (54) is teardrop-shaped with an arc-shaped end.

9. The pressure steel pipe rust removal device according to claim 8, characterized in that: The positioning assembly (5) further comprises a spring (53), the outer side of the positioning plate (51) is elastically connected to the support plate (52) via the spring (53), and a knob cover for rotation is installed on the outer side of the support plate (52).

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