Device for repairing sunken part of steel pipe

Abstract

The utility model provides a device for repairing a sunken part of a steel pipe, and belongs to the field of steel pipe repairing. The device comprises a main frame, the main frame is provided with a connecting column extending transversely, a repairing device is arranged at the end, away from the main frame, of the connecting column, a first hydraulic cylinder is arranged in the repairing device, an output shaft of the first hydraulic cylinder is upwards placed, and an upward jacking device is arranged on the output shaft of the first hydraulic cylinder; the steel pipe repairing device has the advantages that in the repairing process, due to the shape of the upper jacking shaft, the tangent line at the uppermost end of the upper jacking shaft abuts against the concave area, the upper jacking shaft can accurately abut against the concave area, and the situation that the concave area is jacked out of a steel pipe in the repairing process due to the fact that the contact face is too wide is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of steel pipe repair, and in particular relates to a device for repairing dents in steel pipes. Background Technology

[0002] Stainless steel welded pipe repair fixtures are specialized equipment and tools used to repair dents on the surface of stainless steel welded pipes. Stainless steel welded pipes are widely used in industrial production and daily life due to their durability and aesthetic appeal. However, due to various reasons, such as collisions and compression, dents may appear on the surface of stainless steel welded pipes, affecting their appearance and performance. In such cases, stainless steel welded pipe repair fixtures are needed for timely repair and maintenance. Existing steel pipe surface dent repair devices have limitations when repairing steel pipes of different inner diameters. The curvature of the repair area is difficult to perfectly match the inner wall of the pipe, leading to uneven force application during repair. This can result in incomplete repair or over-repair, causing expansion of the pipe body near the dent.

[0003] For example, Chinese patent literature discloses a novel steel pipe surface dent correction and repair device [patent application number: CN201811156244.3], which includes a hydraulic oil pump, hydraulic oil pipe, hydraulic oil cylinder, tie rod, cylinder base, and inner repair mold. The feature is that it also includes an outer repair mold. The hydraulic oil pump, hydraulic oil pipe, and hydraulic oil cylinder are connected in sequence. The lower part of the hydraulic oil cylinder is set on the cylinder base. The inner repair mold is set on the top of the hydraulic oil cylinder. The tie rod is connected to the cylinder base. The outer repair mold is composed of an upper mold groove and a lower mold groove, which are hinged together. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a device for repairing dents in steel pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for repairing dents in steel pipes includes a main frame, the main frame having a laterally extending connecting column, a repair device being provided at the end of the connecting column away from the main frame, a first hydraulic cylinder being provided inside the repair device, the output shaft of the first hydraulic cylinder being placed upward and having an upward lifting device on the output shaft of the first hydraulic cylinder.

[0007] In the aforementioned device for repairing dents in steel pipes, the upper jacking device includes a support frame connected to the output shaft of a first hydraulic cylinder, a rotating shaft is provided at the top of the support frame, and an upper jacking shaft is rotatably connected to the rotating shaft.

[0008] In the aforementioned device for repairing dents in steel pipes, the repair device is rotatably connected to a connecting column, a rotating motor is installed inside the connecting column, the output shaft of the rotating motor is connected to the repair device, a support groove is installed inside the connecting column, and a support ring is installed in the repair device, the support ring extending into the support groove and slidably connected thereto.

[0009] In the aforementioned device for repairing dents in steel pipes, the main frame includes a support column, the support column has a support groove, the connecting column extends into the support groove and is slidably connected thereto, the support column has a linear actuator, and the output shaft of the linear actuator is connected to the connecting column.

[0010] In the aforementioned device for repairing dents in steel pipes, the main frame further includes a base connected to a support column, and the bottom of the support column is provided with a movable structure.

[0011] In the aforementioned device for repairing dents in steel pipes, a second hydraulic cylinder is provided inside the base, and the output shaft of the second hydraulic cylinder is connected to the support column.

[0012] In the aforementioned device for repairing dents in steel pipes, the support column is further provided with a horizontally placed inner support rod, which slides within the outer support rod, and the outer support rod is connected to the connecting column.

[0013] In the aforementioned device for repairing dents in steel pipes, the movable structure includes two pairs of opposing movable wheels.

[0014] In the aforementioned device for repairing dents in steel pipes, the bottom of the support column is provided with a horizontally placed support column extending toward the repair device, and the bottom of the end of the horizontal support column away from the support column is also provided with a set of movable structures.

[0015] In the aforementioned device for repairing dents in steel pipes, the rotation range of the repair device is -30° to 30°.

[0016] Compared with the existing technology, the advantages of this utility model are:

[0017] 1. During the repair process, the shape of the top shaft ensures that the tangent at the top of the top shaft abuts against the recessed area, allowing it to accurately abut against the recessed area and preventing the steel pipe from being pushed out of the recessed area during the repair process due to an excessively wide contact surface.

[0018] 2. The rotation center of the repair device coincides with the center line of the steel pipe. The repair device rotates under the operation of the rotating motor. Therefore, the swing area of ​​the upper shaft is the arc surface of the inner wall of the steel pipe, so it can continuously repair the dented area. After the repair is completed, there will be no problem of the steel pipe being pushed out. Since the dented area is often not a point but an area, the rotation of the upper shaft can repair the area at the same time.

[0019] 3. Since the steel pipes that need to be repaired are often of different sizes, the repair device is moved vertically by the second hydraulic cylinder, and finally moved to a position where its rotation center coincides with the center line of the steel pipe, thus improving the compatibility. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure;

[0021] Figure 2 yes Figure 1 A schematic diagram of the upper and middle top device.

[0022] In the diagram: Main frame 10, connecting column 11, repair device 12, first hydraulic cylinder 13, top lifting device 14, support frame 15, rotating shaft 16, top lifting shaft 17, rotating motor 18, support groove 19, support ring 20, support column 21, support slide 22, linear actuator 23, base 24, second hydraulic cylinder 25, inner support rod 26, outer support rod 28, moving wheel 29, transverse support column 30. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] This utility model provides a device for repairing dents in steel pipes, combined with... Figure 1-2 As shown, it includes a main frame 10, the main frame 10 is provided with a horizontally extending connecting column 11, the end of the connecting column 11 away from the main frame 10 is provided with a repair device 12, the repair device 12 is provided with a first hydraulic cylinder 13, the output shaft of the first hydraulic cylinder 13 is placed upward and the output shaft of the first hydraulic cylinder 13 is provided with an upward lifting device 14.

[0025] In this embodiment, when the steel pipe is dented and needs repair, the repair device is placed inside the steel pipe, and the repair device 12 is moved directly below the area to be repaired. Then, the first hydraulic cylinder 13 works to move the upper lifting device 14 upward and abut against the dented area. As the first hydraulic cylinder 13 continues to work, the upper lifting device 14 continues to move upward and pushes the dented area upward to achieve the repair effect.

[0026] The upper lifting device 14 includes a support frame 15 connected to the output shaft of the first hydraulic cylinder 13. The top of the support frame 15 is provided with a rotating shaft 16, and an upper lifting shaft 17 is rotatably connected to the rotating shaft 16.

[0027] In this embodiment, during the repair process, the shape of the upper top shaft 17 causes the tangent at the uppermost end of the upper top shaft 17 to abut against the recessed area, so that it can accurately abut against the recessed area, preventing the steel pipe from being pushed out of the recessed area during the repair process due to an excessively wide contact surface.

[0028] The repair device 12 is rotatably connected to the connecting column 11. The connecting column 11 is equipped with a rotating motor 18. The output shaft of the rotating motor 18 is connected to the repair device 12. The connecting column 11 is equipped with a support groove 19. The repair device 12 is equipped with a support ring 20. The support ring 20 extends into the support groove 19 and is slidably connected to it.

[0029] In this embodiment, during the repair process, the rotation center of the repair device 12 coincides with the center line of the steel pipe. During the repair process, the upper top shaft 17 abuts against the recessed area. The repair device 12 rotates under the operation of the rotating motor 18, thereby causing the upper top shaft 17 to rotate along the center line of the steel pipe. Since the rotation center of the upper top shaft 17 coincides with the center line of the steel pipe, the swing area of ​​the upper top shaft 17 is the arc surface of the inner wall of the steel pipe, so that the recessed area can be continuously repaired. After the repair is completed, there will be no problem of the steel pipe being pushed out. Since the recessed area is often not a point but an area, the rotation of the upper top shaft 17 can repair the area at the same time.

[0030] The main frame 10 includes a support column 21, a support groove 22 is provided in the support column 21, a connecting column 11 extends into the support groove 22 and is slidably connected to it, a linear actuator 23 is provided in the support column 21, and the output shaft of the linear actuator 23 is connected to the connecting column 11.

[0031] In this embodiment, when there is more than one dented area on the steel pipe, in order to ensure accuracy and prevent multiple angle adjustments, without moving the main frame 10, only the linear actuator 23 needs to work to move the connecting column 11, thereby driving the repair device 12 to move. Due to the rotation of the repair device 12, the repair range is greatly increased, and even if the next dented area is not in the same position as the previous one, no angle adjustment is required.

[0032] The main frame 10 also includes a base 24 connected to the support column 21, and the bottom of the support column 21 is provided with a movable structure.

[0033] In this embodiment, the movable structure enables the entire device to move within the steel pipe.

[0034] The base 24 is equipped with a second hydraulic cylinder 25, and the output shaft of the second hydraulic cylinder 25 is connected to the support column 21.

[0035] In this embodiment, since the steel pipes that need to be repaired are often of different sizes, the repair device 12 is moved vertically by the second hydraulic cylinder 25, and finally the repair device 12 is moved to a position where its rotation center coincides with the center line of the steel pipe, thereby improving the compatibility.

[0036] The support column 21 is also provided with a horizontally placed inner support rod 26, which slides inside the outer support rod 28, and the outer support rod 28 is connected to the connecting column 11.

[0037] In this embodiment, since the horizontal distance between the repair device 12 and the support column 21 is relatively long, the support force of the repair device 12 is distributed through the connection of the outer support rod 28 and the inner support rod 26. Part of the support force is provided by the front end of the support column 21, and the other part is provided by the rear end of the support column 21 through the outer support rod 28 and the inner support rod 26, which can prevent the repair device 12 from shaking during operation.

[0038] The movable structure includes two pairs of opposing movable wheels 29.

[0039] The bottom of the support column 21 is provided with a horizontal support column 30 that is placed horizontally and extends toward the repair device 12. The bottom end of the horizontal support column 30 away from the support column 21 is also provided with a set of movable structures.

[0040] In this embodiment, since the horizontal distance between the repair device 12 and the support column 21 is relatively long, and the repair device 12 has a certain weight, the horizontal support column 30 can prevent the entire device from tipping over.

[0041] The rotation range of the repair device 12 is -30° to 30°.

[0042] In this embodiment, since the rotating motor 18 needs to be connected to the circuit and the first hydraulic cylinder 13 needs to be connected to the oil circuit, limiting the rotation range of the repair device 12 can prevent the oil circuit from getting tangled and damaged.

[0043] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0044] Although this article frequently uses terms such as main frame 10, connecting column 11, repair device 12, first hydraulic cylinder 13, top lifting device 14, support frame 15, rotating shaft 16, top lifting shaft 17, rotating motor 18, support groove 19, support ring 20, support column 21, support slide 22, linear actuator 23, base 24, second hydraulic cylinder 25, inner support rod 26, outer support rod 28, moving wheel 29, and transverse support column 30, these terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A device for repairing dents in steel pipes, comprising a main frame (10), characterized in that, The main frame (10) is provided with a horizontally extending connecting column (11). The end of the connecting column (11) away from the main frame (10) is provided with a repair device (12). The repair device (12) is provided with a first hydraulic cylinder (13). The output shaft of the first hydraulic cylinder (13) is placed upward and an upper lifting device (14) is provided on the output shaft of the first hydraulic cylinder (13).

2. The device for repairing dents in steel pipes according to claim 1, characterized in that, The upper lifting device (14) includes a support frame (15) connected to the output shaft of the first hydraulic cylinder (13). The top of the support frame (15) is provided with a rotating shaft (16), and an upper lifting shaft (17) is rotatably connected to the rotating shaft (16).

3. The device for repairing dents in steel pipes according to claim 2, characterized in that, The repair device (12) is rotatably connected to the connecting column (11). The connecting column (11) is equipped with a rotating motor (18). The output shaft of the rotating motor (18) is connected to the repair device (12). The connecting column (11) is equipped with a support groove (19). The repair device (12) is equipped with a support ring (20). The support ring (20) extends into the support groove (19) and is slidably connected to it.

4. The device for repairing dents in steel pipes according to claim 3, characterized in that, The main frame (10) includes a support column (21), a support groove (22) is provided in the support column (21), a connecting column (11) extends into the support groove (22) and is slidably connected thereto, a linear driver (23) is provided in the support column (21), and the output shaft of the linear driver (23) is connected to the connecting column (11).

5. The device for repairing dents in steel pipes according to claim 4, characterized in that, The main frame (10) also includes a base (24) connected to the support column (21), and the bottom of the support column (21) is provided with a movable structure.

6. The device for repairing dents in steel pipes according to claim 5, characterized in that, The base (24) is equipped with a second hydraulic cylinder (25), and the output shaft of the second hydraulic cylinder (25) is connected to the support column (21).

7. The device for repairing dents in steel pipes according to claim 6, characterized in that, The support column (21) is also provided with a horizontally placed inner support rod (26), which slides inside the outer support rod (28), and the outer support rod (28) is connected to the connecting column (11).

8. The device for repairing dents in steel pipes according to claim 5, characterized in that, The moving structure includes two pairs of opposing moving wheels (29).

9. The device for repairing dents in steel pipes according to claim 8, characterized in that, The bottom of the support column (21) is provided with a horizontal support column (30) that is placed horizontally and extends toward the repair device (12). The bottom of the end of the horizontal support column (30) away from the support column (21) is also provided with a set of movable structures.

10. The device for repairing dents in steel pipes according to claim 8, characterized in that, The rotation range of the repair device (12) is -30° to 30°.

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