Crack, rust and leakage repair equipment for metal storage tanks and pipeline equipment

By designing automated rust removal and repair equipment, safety hazards caused by metal storage tanks and pipeline equipment due to rust and cracks are solved, and automatic rust removal, cleaning and repair are achieved to ensure the safety of equipment and facilities and avoid high-risk operations.

CN222696819UActive Publication Date: 2025-04-01GUANGDONG JIANHAO PETROCHEMICAL ENG CO LTD
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Patent Information

Application Number
CN202421049306.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-14
Publication Date
2025-04-01
Estimated Expiration
2034-05-14

AI Technical Summary

Technical Problem

During the use of metal storage tanks and pipeline equipment, due to rust, cracks, rust leakage and other problems, it leads to safety hazards in equipment and facilities, and it is difficult for the existing technology to carry out fire and welding repair in flammable and explosive dangerous areas.

Method used

An automated rust removal and repair equipment is designed, including brackets, sliders, push components, rust removal wheels, bristles, spray heads and repair agent components, which can achieve rust removal, cleaning and repair through automated processes to avoid fire and welding operations.

Benefits of technology

The entire process of automatic rust removal and repair of metal storage tanks and pipeline equipment has been realized, ensuring the safety of equipment and facilities, avoiding high-risk operations, and improving production efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a crack, rust and leakage repairing device for metal storage tanks and pipeline equipment, and relates to the technical field of metal processing, including a bracket, a first slide and a second slide, the bracket is provided with two groups, the first slide and the second slide are respectively movably mounted on the two groups of the brackets, and a push plate is installed on the lower inner side of the first slide and the upper and lower inner sides of the second slide through a pushing assembly; the utility model places the material to be repaired on the inner side of a rotating circle for fixing, and rotates the circle to direct the rusted or leaking part of the material toward a rust removing wheel, the second slide is adjusted, and the pushing assembly pushes the rust removing wheel to remove the surface rust layer, and the brush bristles contact the rust removal part to clean it, and then the circle is rotated to direct the repair point of the material toward the first slide, and the spray head is adjusted to spray the repair agent onto the treated repair point surface, and the first slide moves in coordination with the pushing assembly to push the scraper to contact the spraying part for scraping, thereby achieving the full process of automated rust removal and repair, and solving the repair problem.
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Description

Technical Field

[0001] The utility model relates to the technical field of metal processing, in particular to equipment for repairing cracks, rust and leakage of metal storage tanks and pipeline equipment. Background Art

[0002] Before manufacturing and use, all kinds of metal storage and transportation equipment and facilities have been well protected from corrosion on the outer or inner surfaces. However, after being put into use, due to the external environment or the erosion of natural phenomena such as wind, rain, frost and snow all year round, or the load and pressure during use, extremely high or low temperature, or the storage and transportation of corrosive materials, or the use of materials and gases that are corrosive to the environment, the equipment and facilities will rust to varying degrees, bringing potential hidden dangers to production safety. At the same time, because the external environment of the production and operation of many equipment and facilities belongs to the flammable and explosive dangerous area, the materials produced, transported and stored are dangerous chemicals. The repair work carried out in these areas and on equipment not only involves high-risk operations such as hot work, equipment cleaning and cleaning operations, and even confined space operations, which requires enterprises to invest a lot of manpower, material and financial resources, but also requires the equipment to be shut down for a long time, which greatly affects production efficiency.

[0003] In order to solve the problem of metal equipment being unsuitable for hot work and welding repair due to pits caused by rust, or defects such as rust perforation, weld debonding, cracks, sand holes, etc., which are caused by pits caused by rust, and ensure the safety of equipment and facilities, the utility model proposes a crack, rust and leakage repair device for metal storage tanks and pipeline equipment to solve the problems existing in the prior art. Utility Model Content

[0004] In view of the above problems, the utility model proposes a crack, rust and leakage repair device for metal storage tanks and pipeline equipment. The crack, rust and leakage repair device for metal storage tanks and pipeline equipment achieves the full process of automated rust removal and repair, solves the repair problem, and ensures the safety of equipment and facilities.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a crack, rust and leakage repairing device for metal storage tanks and pipeline equipment, comprising a bracket, a first slide and a second slide, the bracket is provided with two groups, the first slide and the second slide are movably mounted on the two groups of the brackets respectively, a push plate is installed at the lower part of the inner side of the first slide and at the upper and lower parts of the inner side of the second slide through a pushing assembly, an axis plate is provided on the push plate at the lower part of the inner side of the second slide, and a rust removing wheel is rotatably provided on the inner side of the axis plate, a cleaning block is provided on the push plate at the upper part of the inner side of the second slide, and bristles are provided on the inner side of the cleaning block, a scraper is provided on the push plate at the lower part of the inner side of the first slide, and a first hydraulic rod is provided at the upper part of the inner side of the first slide, a spray head is connected to the output end of the first hydraulic rod, and the spray head is connected to the repair agent assembly;

[0006] A connecting plate is provided below the inner side of the two groups of brackets, and a rotating circle is rotatably provided on the connecting plate, and a clamping assembly is provided on the inner side of the rotating circle.

[0007] Further improvements are: an inner groove is provided at the middle position of the outer side of the two groups of brackets, and a rack is provided inside the inner groove, and side plates are provided on the outer sides of the first slide and the second slide, and gears matching the racks are rotatably provided on the inner sides of the side plates, and the gears are driven to rotate by a servo motor.

[0008] A further improvement is that the pushing and extending assembly includes a second hydraulic rod and a guide rod, a second hydraulic rod is provided below the inner side of the first slide and above and below the inner side of the second slide, the push plate is provided at the output end of the second hydraulic rod, guide rods are provided at both ends of the outer side of the push plate, guide blocks are provided below the two ends of the first slide and above and below the two ends of the second slide, and the guide rod is used to movably pass through the guide block.

[0009] A further improvement is that: a blowing hole is provided on one side of the cleaning block, and a plurality of blowing holes are provided. A fan is provided above the cleaning block, and an input end of the fan is communicated with the blowing hole.

[0010] A further improvement is that a mounting block is provided on the push plate at the lower inner side of the first slide seat, and the scraper is inserted into the interior of the mounting block and fixed by fastening bolts.

[0011] A further improvement is that the repair agent assembly includes a repair agent tank and a pressure pump, the repair agent tank is filled with repair agent, the input end of the pressure pump is connected to the repair agent tank, and the output end of the pressure pump is connected to a stretching tube, and the output end of the stretching tube is connected to the spray head.

[0012] A further improvement is that a gear ring is provided below the rotating circle, and the gear ring is rotatably provided on a connecting plate, a motor is provided on one side of the bottom of the connecting plate, and the output end of the motor passes through the connecting plate and is provided with a driving gear, the driving gear is matched with the gear ring, and support plates are connected between the two sides of the bottom of the connecting plate and the brackets on both sides.

[0013] A further improvement is that the clamping assembly includes an electric telescopic rod and a clamping piece, the electric telescopic rod is arranged on both sides of the rotating circle, and the output end of the electric telescopic rod passes through the rotating circle, and the output end of the electric telescopic rod is connected to the clamping piece.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model places the material to be repaired on the inner side of the rotating circle and fixes it through the clamping assembly, and rotates in a circle to direct the rusted or leaked part of the material toward the rust removing wheel. After the second slide seat adjusts its position, the pushing assembly pushes the rust removing wheel to remove the rust layer on the surface of the rusted or leaked part. The second slide seat moves in coordination with the pushing assembly to push the bristles to contact the rust removal part for cleaning. Then, the repair point of the material is directed toward the first slide seat through rotating in a circle. After the spray head is adjusted, the repair agent in the repair agent assembly is sprayed onto the treated repair point surface. The first slide seat moves in coordination with the pushing assembly to push the scraper to contact the sprayed part for scraping, thereby achieving the full process of automated rust removal and repair, solving the repair problem, and ensuring the safety of equipment and facilities.

[0016] 2. During the brush cleaning process, the utility model uses the fan and the blowing hole to blow away the dust during cleaning, ensuring that there is no visible grease and dirt on the surface of the material, and no loosely attached oxide scale, rust, paint coating and other attachments, so the repair effect is better.

[0017] 3. The utility model can dismantle or install the scraper by means of the mounting block and the fastening bolts, so that it is convenient to replace the scraper adapted to the current repair material, and the functions are diversified. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the utility model;

[0019] Figure 2 This is a schematic diagram of a cleaning block of the utility model;

[0020] Figure 3 This is a schematic diagram of the installation of the scraper of the utility model;

[0021] Figure 4 It is a schematic diagram of the repair agent component of the utility model;

[0022] Figure 5 It is a schematic diagram of the rotating installation of the utility model.

[0023] Among them: 1. bracket; 2. first slide; 3. second slide; 4. push plate; 5. shaft plate; 6. rust removal wheel; 7. cleaning block; 8. bristles; 9. scraper; 10. first hydraulic rod; 11. spray head; 12. connecting plate; 13. rotating circle; 14. inner groove; 15. side plate; 16. gear; 17. servo motor; 18. second hydraulic rod; 19. guide rod; 20. guide block; 21. blowing hole; 22. fan; 23. mounting block; 24. fastening bolt; 25. repair agent tank; 26. pressure pump; 27. stretching tube; 28. gear ring; 29. ​​motor; 30. driving gear; 31. electric telescopic rod; 32. clip; 33. support plate. DETAILED DESCRIPTION

[0024] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention. Example

[0025] according to Figure 1 , 2 As shown in Figures 3, 4 and 5, this embodiment proposes a crack, rust and leakage repairing device for metal storage tanks and pipeline equipment, including a bracket 1, a first slide 2 and a second slide 3. The bracket 1 is provided with two groups, and the first slide 2 and the second slide 3 are movably installed on the two groups of brackets 1 respectively. A push plate 4 is installed at the lower part of the inner side of the first slide 2 and the upper and lower parts of the inner side of the second slide 3 through a pushing assembly. A shaft plate 5 is provided on the push plate 4 at the lower part of the inner side of the second slide 3, and a rust removing wheel 6 is rotatably provided on the inner side of the shaft plate 5. A cleaning block 7 is provided on the push plate 4 at the upper part of the inner side of the second slide 3, and bristles 8 are provided on the inner side of the cleaning block 7. A scraper 9 is provided on the push plate 4 at the lower part of the inner side of the first slide 2, and a first hydraulic rod 10 is provided at the upper part of the inner side of the first slide 2. The output end of the first hydraulic rod 10 is connected to a spray head 11, and the spray head 11 is connected to a repair agent assembly.

[0026] A connecting plate 12 is provided below the inner side of the two groups of brackets 1, and a rotating circle 13 is rotatably provided on the connecting plate 12, and a clamping assembly is provided inside the rotating circle 13. When in use, the material to be repaired (metal storage tanks, pipelines and other equipment) is placed inside the rotating circle 13 and fixed by the clamping assembly, and the rusted or leaked part of the material is turned toward the rust removal wheel 6 by rotating the rotating circle 13. After the second slide 3 is adjusted in position, the pushing assembly pushes the rust removal wheel 6 to remove the rust layer on the surface of the rusted or leaked part. The second slide 3 moves in coordination with the pushing assembly to push the bristles 8 to contact the rust removal part for cleaning. Then, the repair point of the material is rotated toward the first slide 2 by rotating the rotating circle 13. After the spray head 11 is adjusted in position, the repair agent in the repair agent assembly is sprayed onto the treated repair point surface. The first slide 2 moves in coordination with the pushing assembly to push the scraper 9 to contact the sprayed part for scraping, thereby achieving the full process of automated rust removal and repair, and solving the repair problem.

[0027] An inner groove 14 is provided at the middle position of the outer side of the two groups of brackets 1, and a rack is provided inside the inner groove 14. Side plates 15 are provided on the outer sides of the first slide 2 and the second slide 3, and a gear 16 adapted to the rack is rotatably provided inside the side plate 15, and the gear 16 is driven to rotate by a servo motor 17. When in use, the servo motor 17 drives the gear 16 to rotate and mesh with the rack, driving the first slide 2 and the second slide 3 to move along the bracket 1, which is convenient for changing the position and also convenient for the operation of the bristles 8 and the scraper 9.

[0028] The push-out assembly includes a second hydraulic rod 18 and a guide rod 19. The second hydraulic rod is provided below the inner side of the first slide 2 and above and below the inner side of the second slide 3. The push plate 4 is provided at the output end of the second hydraulic rod 18. The two ends of the outer side of the push plate 4 are provided with guide rods 19. The two ends of the first slide 2 and above and below the two ends of the second slide 3 are provided with guide blocks 20. The guide rod 19 is used to move through the guide blocks 20. When in use, the second hydraulic rod 18 pushes the push plate 4 to move, and the guide rod 19 moves inside the guide block 20 to improve stability. The push plate 4 moves so that the bristles 8, the scraper 9, and the rust removal wheel 6 contact the repair point.

[0029] A blowing hole 21 is provided on one side of the cleaning block 7, and the blowing hole 21 is provided with a plurality of groups. A fan 22 is provided above the cleaning block 7, and the input end of the fan 22 is connected to the blowing hole 21. During the cleaning process of the bristles 8, air is blown by the fan 22 and the blowing hole 21 to blow away the dust during cleaning, ensuring that there is no visible grease and dirt on the surface of the material, and no loosely attached oxide scale, rust, paint coating and other attachments, so that the repair effect is better.

[0030] A mounting block 23 is provided on the push plate 4 at the lower inner side of the first slide seat 2, and the scraper 9 is inserted into the mounting block 23 and fixed by a fastening bolt 24. When in use, the scraper 9 can be removed or installed by cooperating with the mounting block 23 and the fastening bolt 24, so that the scraper 9 adapted to the current repair material can be replaced easily, and the functions are diversified.

[0031] The repair agent assembly includes a repair agent tank 25 and a pressure pump 26. The repair agent tank 25 is filled with a repair agent. The input end of the pressure pump 26 is connected to the repair agent tank 25, and the output end of the pressure pump 26 is connected to a stretching tube 27. The output end of the stretching tube 27 is connected to the spray head 11. When in use, the pressure pump 26 is pressurized to input the repair agent in the repair agent tank 25 into the stretching tube 27 to the spray head 11, and the repair agent in the repair agent assembly is sprayed onto the treated repair point surface. The stretching tube 27 can be stretched to adapt to the movement of the first slide 2. Example

[0032] according to Figure 1 , 2As shown in Figures 3, 4 and 5, this embodiment proposes a crack, rust and leakage repairing device for metal storage tanks and pipeline equipment, including a bracket 1, a first slide 2 and a second slide 3. The bracket 1 is provided with two groups, and the first slide 2 and the second slide 3 are movably installed on the two groups of brackets 1 respectively. A push plate 4 is installed at the lower part of the inner side of the first slide 2 and the upper and lower parts of the inner side of the second slide 3 through a pushing assembly. A shaft plate 5 is provided on the push plate 4 at the lower part of the inner side of the second slide 3, and a rust removing wheel 6 is rotatably provided on the inner side of the shaft plate 5. A cleaning block 7 is provided on the push plate 4 at the upper part of the inner side of the second slide 3, and bristles 8 are provided on the inner side of the cleaning block 7. A scraper 9 is provided on the push plate 4 at the lower part of the inner side of the first slide 2, and a first hydraulic rod 10 is provided at the upper part of the inner side of the first slide 2. The output end of the first hydraulic rod 10 is connected to a spray head 11, and the spray head 11 is connected to a repair agent assembly.

[0033] A connecting plate 12 is provided below the inner side of the two groups of brackets 1, and a rotating circle 13 is rotatably provided on the connecting plate 12, and a clamping assembly is provided inside the rotating circle 13. When in use, the material to be repaired (metal storage tanks, pipelines and other equipment) is placed inside the rotating circle 13 and fixed by the clamping assembly, and the rusted or leaked part of the material is turned toward the rust removal wheel 6 by rotating the rotating circle 13. After the second slide 3 is adjusted in position, the pushing assembly pushes the rust removal wheel 6 to remove the rust layer on the surface of the rusted or leaked part. The second slide 3 moves in coordination with the pushing assembly to push the bristles 8 to contact the rust removal part for cleaning. Then, the repair point of the material is rotated toward the first slide 2 by rotating the rotating circle 13. After the spray head 11 is adjusted in position, the repair agent in the repair agent assembly is sprayed onto the treated repair point surface. The first slide 2 moves in coordination with the pushing assembly to push the scraper 9 to contact the sprayed part for scraping, thereby achieving the full process of automated rust removal and repair, and solving the repair problem.

[0034] A gear ring 28 is provided below the rotating circle 13, and the gear ring 28 is rotatably provided on the connecting plate 12. A motor 29 is provided on one side of the bottom of the connecting plate 12, and the output end of the motor 29 passes through the connecting plate 12 and is provided with a driving gear 30. The driving gear 30 is adapted to the gear ring 28. Support plates 33 are connected between the two sides of the bottom of the connecting plate 12 and the brackets 1 on both sides. The clamping assembly includes an electric telescopic rod 31 and a clip 32. The electric telescopic rod 31 is provided on both sides of the rotating circle 13, and the output end of the electric telescopic rod 31 passes through the rotating circle 13. The output end of the electric telescopic rod 31 is connected to the clip 32. When in use, an opening is provided on the connecting plate 12, and the material to be processed can be inserted into the opening of the connecting plate 12 inside the rotating circle 13, and the clamp 32 is pushed by the electric telescopic rod 31 to clamp the material. The driving gear 30 is driven to rotate by the motor 29, driving the gear ring 28 and the rotating circle 13 to rotate, which can change the direction of the repair point on the material, thereby facilitating the processing of the components on the first slide 2 and the second slide 3 on both sides.

[0035] It is suitable for repairing safety defects such as rust pits, perforations, weld desoldering, cracks, sand holes, etc. produced in equipment and components made of various metal pig iron, cast iron, stainless steel, aluminum alloy, zinc alloy, hard PVC, etc. After repair, it has excellent properties such as waterproof, gasoline-resistant, wear-resistant, corrosion-resistant, high temperature-resistant, vibration-resistant, aging-resistant, and fatigue-resistant.

[0036] The utility model puts the material to be repaired into the inner side of the rotating circle 13 and fixes it through the clamping assembly. The rotating circle 13 rotates to direct the rusted or leaked part of the material toward the rust removal wheel 6. After the second slide 3 adjusts its position, the extension assembly pushes the rust removal wheel 6 to remove the rust layer on the surface of the rusted or leaked part. The second slide 3 moves in coordination with the extension assembly to push the bristles 8 to contact the rust removal part and clean it. Then, the repair point of the material is directed toward the first slide 2 through the rotating circle 13. After the spray head 11 is adjusted, the repair agent in the repair agent assembly is sprayed onto the surface of the treated repair point. The first slide 2 moves in coordination with the extension assembly to push the scraper 9 to contact the spraying part for scraping, thereby achieving the full process of automated rust removal and repair, solving the repair problem, and ensuring the safety of equipment and facilities. In addition, during the cleaning process of the bristles 8, the fan 22 blows air and the blowing hole 21 blows air to blow away the dust during cleaning, ensuring that there is no visible grease and dirt on the surface of the material, and there are no loosely attached oxide scales, rust, paint coatings and other attachments, so that the repair effect is better. At the same time, the scraper 9 can be disassembled or installed by the mounting block 23 and the fastening bolts 24, so that the scraper 9 suitable for the current repair material can be replaced easily, and the functions are diversified. At the same time, the utility model controls the distance between the scraper 9 and the repair point for the first scraping, fills the holes and cracks below the surface, checks that there are no bubbles or debris on the surface of the repair agent, and then waits for the repair agent to solidify, scrapes another layer of the repair agent, expands the scraping area of ​​the repair agent, makes the holes and cracks bulge, forms a slope on the surface of the body, and increases the thickness of the force-bearing part, thereby ensuring the strength of the repaired part.

[0037] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A crack, rust and leakage repair device for metal storage tanks and pipeline equipment, comprising a bracket (1), a first slide seat (2) and a second slide seat (3), characterized in that: The bracket (1) is provided with two groups, the first slide (2) and the second slide (3) are movably mounted on the two groups of brackets (1), respectively; a push plate (4) is mounted below the inner side of the first slide (2) and above and below the inner side of the second slide (3) through a pushing assembly; an axis plate (5) is provided on the push plate (4) below the inner side of the second slide (3), and a rust removal wheel (6) is rotatably provided on the inner side of the axis plate (5); a cleaning block (7) is provided on the push plate (4) above the inner side of the second slide (3), and bristles (8) are provided on the inner side of the cleaning block (7); a scraper (9) is provided on the push plate (4) below the inner side of the first slide (2), and a first hydraulic rod (10) is provided above the inner side of the first slide (2); an output end of the first hydraulic rod (10) is connected to a spray head (11), and the spray head (11) is connected to a repair agent assembly; A connecting plate (12) is provided below the inner side of the two groups of brackets (1), and a rotating circle (13) is rotatably provided on the connecting plate (12), and a clamping assembly is provided on the inner side of the rotating circle (13).

2. The crack, rust and leakage repair equipment for metal storage tanks and pipeline equipment according to claim 1 is characterized by: An inner groove (14) is provided at the middle position of the outer side of the two groups of brackets (1), and a rack is provided inside the inner groove (14). Side plates (15) are provided on the outer sides of the first slide seat (2) and the second slide seat (3), and a gear (16) matching the rack is rotatably provided on the inner side of the side plate (15), and the gear (16) is driven to rotate by a servo motor (17).

3. The crack, rust and leakage repair equipment for metal storage tanks and pipeline equipment according to claim 1 is characterized by: The pushing and extending assembly comprises a second hydraulic rod (18) and a guide rod (19). The second hydraulic rod is provided below the inner side of the first slide (2) and above and below the inner side of the second slide (3). The push plate (4) is provided at the output end of the second hydraulic rod (18). Both ends of the outer side of the push plate (4) are provided with guide rods (19). Guide blocks (20) are provided below the two ends of the first slide (2) and above and below the two ends of the second slide (3). The guide rod (19) is used to movably penetrate the guide block (20).

4. The crack, rust and leakage repair equipment for metal storage tanks and pipeline equipment according to claim 1 is characterized by: A blowing hole (21) is provided on one side of the cleaning block (7), and a plurality of blowing holes (21) are provided. A fan (22) is provided above the cleaning block (7), and an input end of the fan (22) is communicated with the blowing hole (21).

5. The crack, rust and leakage repair equipment for metal storage tanks and pipeline equipment according to claim 1 is characterized by: A mounting block (23) is provided on the push plate (4) at the lower inner side of the first slide seat (2), and the scraper (9) is inserted into the interior of the mounting block (23) and fixed by means of fastening bolts (24).

6. The crack, rust and leakage repair equipment for metal storage tanks and pipeline equipment according to claim 1 is characterized by: The repair agent assembly comprises a repair agent tank (25) and a pressure pump (26), wherein the repair agent tank (25) is filled with a repair agent, an input end of the pressure pump (26) is connected to the repair agent tank (25), and an output end of the pressure pump (26) is connected to a stretch tube (27), and an output end of the stretch tube (27) is connected to the spray head (11).

7. The crack, rust and leakage repair equipment for metal storage tanks and pipeline equipment according to claim 1 is characterized by: A gear ring (28) is provided below the rotating circle (13), and the gear ring (28) is rotatably provided on the connecting plate (12). A motor (29) is provided on one side of the bottom of the connecting plate (12), and the output end of the motor (29) passes through the connecting plate (12) and is provided with a driving gear (30). The driving gear (30) is matched with the gear ring (28). Support plates (33) are connected between the two sides of the bottom of the connecting plate (12) and the brackets (1) on both sides.

8. The crack, rust and leakage repair equipment for metal storage tanks and pipeline equipment according to claim 7 is characterized by: The clamping assembly comprises an electric telescopic rod (31) and a clamping piece (32); the electric telescopic rod (31) is arranged on both sides of the rotating circle (13); the output end of the electric telescopic rod (31) passes through the rotating circle (13); and the output end of the electric telescopic rod (31) is connected to the clamping piece (32).

Citation Information

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