A welding repair device and repair method for damaged oil cylinder seal

Abstract

The present invention discloses a welding repair device for a damaged oil cylinder seal and a repair method thereof, and belongs to the technical field of oil cylinder repair. The welding repair device for a damaged oil cylinder seal and a repair method thereof of the present invention include a first fixing plate, and the four corners of the lower end of the first fixing plate are provided with support rods; a pair of first connecting blocks are longitudinally provided, and one end of the two first connecting blocks is fixedly connected by a sliding ring, and a first hydraulic telescopic rod is provided on one side of the outer side of the sliding ring. The present invention solves the problem that a large force during clamping and fixing of the existing rail welding repair device may cause damage to the oil cylinder. The present invention has a first adapting transmission belt and a first adapting roller fit the oil cylinder. The present invention has a first shock absorber shrink the caliber of the adapting oil cylinder, and the clamping is used for auxiliary fixing. The first adapting roller carries the weight to assist in clamping and fixing, thereby reducing the clamping and fixing, and avoiding the large force generated by the clamping to cause further damage to the oil cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of oil cylinder repair, and in particular to a welding repair device for damaged oil cylinder seal and a repair method thereof. Background Art

[0002] The oil cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. When the inner wall of the oil cylinder is cracked after long-term use, the internal medium will be exposed. In this case, people often fix it by welding, and process and repair the gap position by welding;

[0003] A Chinese patent with publication number CN208104923U discloses a seamless track rail welding and repair vehicle, comprising a main frame, a driver's cab being arranged on the main frame, couplers being arranged at both ends of the main frame, and a running gear, an air compressor, a water tank, a hydraulic pump station and a tool box, and hydraulic legs being arranged in sequence from front to rear at the lower part of the main frame; a work shop covering the upper part of the main frame is arranged behind the driver's cab, and the main frame is loaded with new rails. The seamless track rail welding and repair vehicle provided by the utility model can complete operations such as sawing off severely damaged rails, end surface processing of new rails and finishing of welding head shape, and is also equipped with a rail welding machine and a rail adjustment device, which can complete the connection of new rails with existing lines.

[0004] The welding repair device of the above patent is mainly used for clamping and fixing strip-shaped objects during actual use. In the actual fixing process of the strip-shaped oil cylinder, the two sides of the strip-shaped oil cylinder are often clamped. Clamping and preventing it from falling off will require a large force during the clamping process, and a large force will cause further damage to the oil cylinder; therefore, it does not meet the existing needs. We have proposed a welding repair device for damaged cylinder seals and a repair method thereof. Summary of the invention

[0005] The object of the present invention is to provide a welding repair device for a damaged cylinder seal and a repair method thereof. The first hydraulic telescopic rod is extended and pushed to push the clamping gasket to fit on both sides of the cylinder. After the fitting and auxiliary fixation are completed, the rotating sliding ring can drive the first adapting roller and the external first adapting transmission belt to move to the upper and lower ends of the cylinder, move and first fit the cylinder by the first adapting transmission belt and the first adapting roller, and the first shock absorber shrinks the caliber of the adapting cylinder to adapt to and bear most of the overall mass of the cylinder. During the overall fixation and welding process, auxiliary fixation is performed by clamping, and the first adapting roller is used to carry the weight to assist clamping and fixing, thereby reducing clamping and fixing, and avoiding the large force generated by clamping to cause further damage to the cylinder, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a welding repair device for a damaged oil cylinder seal and a repair method thereof, comprising a first fixing plate, support rods are arranged at the four corners of the lower end of the first fixing plate, and a device base is arranged at the lower ends of the two support rods, and the device base, the support rods and the first fixing plate are welded and fixed;

[0007] It also includes a first connecting block, which is arranged on both sides of the upper end of the first fixed plate, a pair of the first connecting blocks are longitudinally arranged, one ends of the two first connecting blocks are fixedly connected by a sliding ring, a first hydraulic telescopic rod is arranged on one side of the outside of the sliding ring, an annular sliding rail is arranged on one side of the inside of the first hydraulic telescopic rod, the inside of the annular sliding rail is slidably connected to one side of the outside of the sliding ring, the insides of the two first connecting blocks are both provided with longitudinal sliding rails, the front ends of the two first connecting blocks are provided with longitudinal bearing plates, and the inside of the longitudinal sliding rails is slidably connected to one end of the longitudinal bearing plate through a third connecting block.

[0008] Preferably, three first shock absorbers are transversely arranged at the lower end of the longitudinal supporting plate, first adapting rollers are arranged on both sides of the lower ends of the three first shock absorbers, a supporting ring is arranged in the middle of the upper end of the outer part of the first fixing plate, three second shock absorbers are transversely arranged at the upper end of the supporting ring, second adapting rollers are arranged on both sides of the outer parts of the three second shock absorbers, and the two second adapting rollers and the two first adapting rollers are fixedly connected by a connecting rod.

[0009] Preferably, one of the connecting rods is rotationally connected to the second shock absorber via a second support frame, another of the connecting rods is rotationally connected to the first shock absorber via a second connecting block, the three of the first adapting rollers are rotationally connected to each other via a first adapting transmission belt, and the three of the second adapting rollers are transmission connected to each other via a second adapting transmission belt.

[0010] Preferably, a clamping gasket is provided at one end of the first hydraulic telescopic rod, and the clamping gasket is rotatably connected to one end of the first hydraulic telescopic rod via a second rotating connecting shaft, a length-adapting sliding plate is provided at the lower end of the outside of the first hydraulic telescopic rod, and two-way threaded rods are provided on both sides of the lower end of the outside of the length-adapting sliding plate, and the outside of the two-way threaded rod is threadedly matched with both sides of the lower end of the inside of the length-adapting sliding plate, and a transverse sliding rail is provided on the outside of the two-way threaded rod, and the transverse sliding rail is slidably connected to the lower end of the outside of the length-adapting sliding plate.

[0011] Preferably, a second hydraulic telescopic rod is provided at the four corners of the lower end of the carrying ring, the four second hydraulic telescopic rods are fixedly connected by a third fixing plate, a third hydraulic telescopic rod is provided between the third fixing plate and the carrying ring, the third hydraulic telescopic rod is fixedly connected to the third fixing plate and the carrying ring, and a storage cavity is provided on the outside of the second hydraulic telescopic rod.

[0012] Preferably, a first support frame is provided on one side outside the first fixing plate, a second fixing plate is provided on one side outside the first supporting frame, the second fixing plate and the first supporting frame are rotatably connected via a first rotating connecting shaft, a fixing ring is provided on the upper end of the second fixing plate, a one-way transmission threaded rod is provided inside the fixing ring, a sliding block is provided on one side outside the one-way transmission threaded rod, and the sliding block cooperates with the external thread of the one-way transmission threaded rod.

[0013] Preferably, a welding repair gun is provided on one side of the outside of the sliding block, and one end of the welding repair gun is rotatably connected to the sliding block via a third rotating connecting shaft.

[0014] Preferably, the second hydraulic telescopic rod is fixedly connected to the first fixing plate via a connecting plate.

[0015] The repair method of the oil cylinder seal damaged welding repair device comprises the following steps:

[0016] Step 1: The motor drives the bidirectional threaded rod to rotate. The rotation of the bidirectional threaded rod can generate relative motion with the length adaptation sliding plate. The length adaptation sliding plate is restricted by the bidirectional threaded rod and converted from rotational motion to linear motion. The two length adaptation sliding plates move relative to each other to adapt to the length of the oil cylinder to be repaired by welding.

[0017] Step 2: The first hydraulic telescopic rod is extended and retracted to drive the clamping gasket to fit the two ends of the oil cylinder, and the longitudinal bearing piece is pushed by the telescopic device to slide longitudinally in the longitudinal sliding rail through the third connecting block. The longitudinal sliding can drive the first shock absorber to support, and then a pair of opposite first adapter rollers are attached to the two sides of the outside of one end of the oil cylinder through the first adapter transmission belt;

[0018] Step 3: The second fixing plate is slid horizontally through the first support frame on one side outside the horizontal sliding rail to the position to be welded and repaired. The position of the welding repair gun is adjusted at the welding repair position. When the welding repair gun overlaps with the longitudinal bearing plates at both ends, the length of the longitudinal bearing plates at the overlapping position is adapted to the horizontal movement of the sliding plate to avoid overlapping. At the same time, the contraction of the second hydraulic telescopic rod drives the bearing ring to move upward;

[0019] Step 4: The upward movement of the carrying ring can drive the second adapting roller and the second adapting transmission belt to fit the lower end of the outer side of the oil cylinder, and fit and fix them with one pair of longitudinal carrying sheets;

[0020] Step 5: While fixing, the rotation of the first adapting roller and the second adapting roller can respectively drive the first adapting transmission belt and the second adapting transmission belt to rotate, and the second adapting transmission belt and the first adapting transmission belt that are in contact with the oil cylinder can drive the oil cylinder to rotate, and the clamping gasket is rotated and matched with one end of the first hydraulic telescopic rod through the second rotating connecting shaft to rotate, and the position and direction to be welded are adjusted by rotation;

[0021] Step 6. The sliding block is driven to slide longitudinally on one side of the outside of the fixed ring by rotating the one-way transmission threaded rod. While sliding, the welding repair gun rotates on one side of the outside of the sliding block with the third rotating connecting axis as the center, fits the welding repair position to complete the heating, and performs the cylinder welding repair position.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention provides a length-adapting sliding plate on both sides of the upper end of the outer side of the first fixing plate, and longitudinal bearing plates are provided at both ends of one side of the outer side of the length-adapting sliding plate, and one end of the two longitudinal bearing plates is provided with a first connecting block, and the two first connecting blocks are fixedly connected by a sliding ring. In the actual clamping and fixing process, the first hydraulic telescopic rod is extended and pushed to fit the two sides of the oil cylinder. After the auxiliary fixing is completed, the rotating sliding ring can drive the first adapting roller and the first external adapting transmission belt to move to the upper and lower ends of the oil cylinder. The first adapting transmission belt and the first adapting roller are moved and first fit the oil cylinder, and the first shock absorber shrinks the caliber of the adapting oil cylinder to adapt to and bear most of the overall mass of the oil cylinder. In the process of overall fixing and welding, clamping is used for auxiliary fixing, and the first adapting roller is used to carry weight to assist clamping and fixing, thereby reducing clamping and fixing, and avoiding that a large force generated by clamping causes further damage to the oil cylinder.

[0024] 2. The present invention is provided with four second hydraulic telescopic rods at the lower end of the outside of the first fixed plate, and the upper ends of the four second hydraulic telescopic rods are provided with load-bearing rings, and second adapting rollers are provided on both sides of the upper ends of the load-bearing rings. A second adapting transmission belt is provided on the outside of the second adapting rollers. In actual use, the welding repair position of the columnar oil cylinder can be clamped and restricted by a pair of longitudinal load-bearing plates and load-bearing rings on both sides of the upper end of the first fixed plate. The two parts of the columnar oil cylinder are clamped and restricted to expose the position to be welded and repaired, which is convenient for welding and repairing the oil cylinder. It is convenient for users to use it according to the welding needs of users and the actual welding position, and the welding efficiency is improved.

[0025] 3. The present invention provides a clamping gasket between two longitudinal bearing plates, and the clamping gasket is rotatably connected to one end of the first hydraulic telescopic rod through a second rotating connecting shaft. In actual use, the rotation of the fitted first adapter roller and the second adapter roller can drive the clamping and carrying strip cylinder to rotate and drive the cylinder to be welded and repaired to adjust its rotation direction, so that the angle of the cylinder can be adjusted without adjusting the clamping structure, and the rotation of the second rotating connecting shaft can avoid friction caused by rotation, thereby improving the welding repair efficiency of the device for the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a stereoscopic diagram of the overall external structure of the present invention;

[0027] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A area;

[0028] Figure 3 A three-dimensional diagram of the external structure of the length-adapting sliding plate of the present invention;

[0029] Figure 4 For the present invention Figure 3 A partial enlarged view of the middle B area;

[0030] Figure 5 It is a three-dimensional diagram of the positional relationship between the carrying ring and the second hydraulic telescopic rod of the present invention.

[0031] In the figure: 1, first fixing plate; 2, device base; 3, support rod; 4, storage chamber; 5, transverse sliding rail; 6, bidirectional threaded rod; 7, length adaptation sliding plate; 8, first hydraulic telescopic rod; 9, longitudinal bearing plate; 10, bearing ring; 11, first support frame; 12, second fixing plate; 13, first rotating connecting shaft; 14, first connecting block; 15, sliding ring; 16, annular sliding rail; 17, first shock absorber; 18, second connecting block; 19, first adaptation roller; 20, first adaptation Transmission belt; 21. longitudinal sliding rail; 22. third connecting block; 23. clamping gasket; 24. second rotating connecting shaft; 25. second hydraulic telescopic rod; 26. third fixing plate; 27. third hydraulic telescopic rod; 28. connecting plate; 29. ​​second shock absorber; 30. second support frame; 31. second adapting roller; 32. second adapting transmission belt; 33. connecting rod; 34. fixing ring; 35. sliding block; 36. welding repair gun; 37. one-way transmission threaded rod; 38. third rotating connecting shaft. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] To further understand the content of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , this embodiment provides the following technical solutions:

[0034] A welding repair device for a damaged oil cylinder seal and a repair method thereof, comprising a first fixing plate 1, support rods 3 are arranged at the four corners of the lower end of the first fixing plate 1, a device base 2 is arranged at the lower ends of the two support rods 3, and the device base 2, the support rods 3 and the first fixing plate 1 are welded and fixed;

[0035] It also includes a first connecting block 14, which is arranged on both sides of the upper end of the first fixed plate 1. A pair of first connecting blocks 14 are longitudinally arranged. One ends of the two first connecting blocks 14 are fixedly connected by a sliding ring 15. A first hydraulic telescopic rod 8 is arranged on one side outside the sliding ring 15. An annular sliding rail 16 is arranged on one side inside the first hydraulic telescopic rod 8. The inside of the annular sliding rail 16 is slidably connected to one side outside the sliding ring 15. A longitudinal sliding rail 21 is arranged inside the two first connecting blocks 14. A longitudinal bearing plate 9 is arranged at the front end of the two first connecting blocks 14. The inside of the longitudinal sliding rail 21 is slidably connected to one end of the longitudinal bearing plate 9 through a third connecting block 22.

[0036] In order to solve the technical problem that the existing welding repair device needs a large force to clamp and prevent it from falling off during actual use, and the large force will cause further damage to the cylinder, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , this embodiment provides the following technical solutions:

[0037] Three first shock absorbers 17 are transversely arranged at the lower end of the longitudinal supporting plate 9, and first adapting rollers 19 are arranged on both sides of the lower ends of the three first shock absorbers 17. A supporting ring 10 is arranged in the middle of the upper end of the outer part of the first fixed plate 1, and three second shock absorbers 29 are transversely arranged on the upper end of the supporting ring 10, and second adapting rollers 31 are arranged on both sides of the outer parts of the three second shock absorbers 29. The two second adapting rollers 31 and the two first adapting rollers 19 are fixedly connected by a connecting rod 33.

[0038] Specifically, the first adapting transmission belt 20 and the first adapting roller 19 are first fitted to the oil cylinder, and the first shock absorber 17 shrinks the diameter of the adapting oil cylinder to adapt to and bear most of the overall mass of the oil cylinder. During the overall fixing and welding process, clamping is used for auxiliary fixation, and the first adapting roller 19 is used to carry the weight to assist in clamping and fixing, thereby reducing clamping and fixing, and avoiding large force generated by clamping to cause further damage to the oil cylinder.

[0039] For further information, see Figure 1 and Figure 5 , this embodiment provides the following technical solutions:

[0040] One of the connecting rods 33 is rotationally connected to the second shock absorber 29 via a second support frame 30, another connecting rod 33 is rotationally connected to the first shock absorber 17 via a second connecting block 18, the three first adapting rollers 19 are rotationally connected via a first adapting transmission belt 20, and the three second adapting rollers 31 are transmission connected via a second adapting transmission belt 32.

[0041] Specifically, the connection of the second connecting block 18 and the cooperation with the first shock absorber 17 can assist the first adapting transmission belt 20 to fit, and can adapt and fit the outer wall of the oil cylinder to improve the stability of clamping.

[0042] For further information, see Figure 1 and Figure 3 , this embodiment provides the following technical solutions:

[0043] A clamping gasket 23 is provided at one end of the first hydraulic telescopic rod 8, and the clamping gasket 23 is rotatably connected to one end of the first hydraulic telescopic rod 8 through a second rotating connecting shaft 24. A length-adapting sliding plate 7 is provided at the lower end of the outside of the first hydraulic telescopic rod 8, and bidirectional threaded rods 6 are provided on both sides of the lower end of the outside of the length-adapting sliding plate 7. The outside of the bidirectional threaded rod 6 is threadedly matched with both sides of the lower end of the inside of the length-adapting sliding plate 7, and a transverse sliding rail 5 is provided on the outside of the bidirectional threaded rod 6. The transverse sliding rail 5 is slidably connected to the lower end of the outside of the length-adapting sliding plate 7.

[0044] Specifically, the rotation of the clamping gasket 23 and the second rotating connecting shaft 24 can avoid friction when the oil cylinder is rotated, which is convenient for adjusting the angle during clamping.

[0045] For further information, see Figure 1 and Figure 5 , this embodiment provides the following technical solutions:

[0046] A second hydraulic telescopic rod 25 is provided at the four corners of the lower end of the carrying ring 10. The four second hydraulic telescopic rods 25 are fixedly connected by a third fixing plate 26. A third hydraulic telescopic rod 27 is provided between the third fixing plate 26 and the carrying ring 10. The third hydraulic telescopic rod 27 is fixedly connected to the third fixing plate 26 and the carrying ring 10. A storage cavity 4 is provided outside the second hydraulic telescopic rod 25.

[0047] Specifically, the contraction of the second hydraulic telescopic rod 25 can raise the height of the carrying ring 10, the second adapting roller 31 and the second adapting transmission belt 32. The height adjustment can support the oil cylinder to adapt to the welding repair position.

[0048] For further information, see Figure 1 and Figure 2 , this embodiment provides the following technical solutions:

[0049] A first support frame 11 is provided on one side outside the first fixing plate 1, a second fixing plate 12 is provided on one side outside the first support frame 11, the second fixing plate 12 is rotatably connected to the first support frame 11 via a first rotating connecting shaft 13, a fixing ring 34 is provided on the upper end of the second fixing plate 12, a one-way transmission threaded rod 37 is provided inside the fixing ring 34, a sliding block 35 is provided on one side outside the one-way transmission threaded rod 37, and the sliding block 35 cooperates with the external thread of the one-way transmission threaded rod 37.

[0050] Specifically, the rotation connection of the first rotation connection shaft 13 can assist in supporting the welding repair gun 36 and facilitate adjustment of the angle of the welding repair gun 36 .

[0051] For further information, see Figure 1 , this embodiment provides the following technical solutions:

[0052] A welding repair gun 36 is disposed on one side of the outside of the sliding block 35 , and one end of the welding repair gun 36 is rotatably connected to the sliding block 35 via a third rotatable connecting shaft 38 .

[0053] Specifically, the angle of the welding repair gun 36 can be adjusted to suit the position to be repaired by welding, thereby improving welding efficiency and welding effect.

[0054] For further information, see Figure 1 and Figure 5 , this embodiment provides the following technical solutions:

[0055] The second hydraulic telescopic rod 25 is fixedly connected to the first fixing plate 1 via a connecting plate 28 .

[0056] Specifically, the third fixing plate 26 and the upper carrying ring 10 , the second adapting roller 31 and the second adapting transmission belt 32 can be suspended and supported through the connection of the connecting plate 28 .

[0057] In order to better demonstrate the repair process of the oil cylinder seal damaged welding repair device, this embodiment proposes a repair method of the oil cylinder seal damaged welding repair device, including the following steps:

[0058] Step 1: The motor drives the bidirectional threaded rod 6 to rotate. The rotation of the bidirectional threaded rod 6 can generate relative motion with the length adaptation sliding plate 7. The length adaptation sliding plate 7 is restricted by the bidirectional threaded rod 6 and then converted from rotational motion to linear motion. The two length adaptation sliding plates 7 move relative to each other to adapt to the length of the oil cylinder to be repaired by welding.

[0059] Step 2: The first hydraulic telescopic rod 8 is extended and retracted to drive the clamping gasket 23 to fit the two ends of the oil cylinder, and the longitudinal bearing sheet 9 is pushed by the telescopic device to slide longitudinally in the longitudinal sliding rail 21 through the third connecting block 22. The longitudinal sliding can drive the first shock absorber 17 to support, and then a pair of opposite first adapting rollers 19 are attached to the two sides of the outside of one end of the oil cylinder through the first adapting transmission belt 20;

[0060] Step 3: The second fixing plate 12 slides horizontally on one side outside the horizontal sliding rail 5 through the first supporting frame 11 to the position to be welded and repaired. The position of the welding repair gun 36 is adjusted at the welding repair position. When the welding repair gun 36 overlaps with the longitudinal bearing plates 9 at both ends, the length of the longitudinal bearing plates 9 at the overlapping position is adapted to the horizontal movement of the sliding plate 7 to avoid overlapping. At the same time, the contraction of the second hydraulic telescopic rod 25 drives the bearing ring 10 to move upward;

[0061] Step 4: The upward movement of the carrying ring 10 can drive the second adapting roller 31 and the second adapting transmission belt 32 to fit the lower end of the outer portion of the oil cylinder, and fit and fix with one pair of longitudinal carrying sheets 9;

[0062] Step 5: While fixing, the first adapting roller 19 and the second adapting roller 31 can respectively drive the first adapting transmission belt 20 and the second adapting transmission belt 32 to rotate, and the second adapting transmission belt 32 and the first adapting transmission belt 20 that are in contact with the oil cylinder can drive the oil cylinder to rotate, and the clamping gasket 23 is rotated at one end of the first hydraulic telescopic rod 8 through the second rotating connecting shaft 24 to rotate and adjust the position and direction to be welded;

[0063] Step 6: The sliding block 35 is driven to slide longitudinally on one side of the outside of the fixed ring 34 by the rotation of the one-way transmission threaded rod 37. While sliding, the welding repair gun 36 rotates on one side of the outside of the sliding block 35 with the third rotating connecting shaft 38 as the center, fits the position to be welded and repaired to complete heating, and performs cylinder welding and repairing.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding repair device for a damaged oil cylinder seal, comprising a first fixing plate (1), support rods (3) are arranged at the four corners of the lower end of the first fixing plate (1), and a device base (2) is arranged at the lower ends of the two support rods (3), and the device base (2), the support rods (3) and the first fixing plate (1) are fixed by welding, characterized in that ； It also includes a first connecting block (14), which is arranged on both sides of the upper end of the first fixing plate (1), a pair of the first connecting blocks (14) are longitudinally arranged, one end of the two first connecting blocks (14) is fixedly connected via a sliding ring (15), a first hydraulic telescopic rod (8) is arranged on one side of the outside of the sliding ring (15), an annular sliding rail (16) is arranged on one side of the inside of the first hydraulic telescopic rod (8), the inside of the annular sliding rail (16) is slidably connected to the side of the outside of the sliding ring (15), the inside of the two first connecting blocks (14) are both provided with a longitudinal sliding rail (21), the front ends of the two first connecting blocks (14) are provided with a longitudinal bearing plate (9), the inside of the longitudinal sliding rail (21) is slidably connected to one end of the longitudinal bearing plate (9) via a third connecting block (22), and three first shock absorbers (17) are transversely arranged at the lower end of the longitudinal bearing plate (9), the three first shock absorbers (17) are arranged on the lower end of the longitudinal bearing plate (9), and the three first shock absorbers (17) are arranged on the lower end of the longitudinal bearing plate (9). First adapting rollers (19) are arranged on both sides of the lower end of the shock absorber (17); a carrying ring (10) is arranged in the middle of the upper end of the first fixing plate (1); three second shock absorbers (29) are arranged transversely on the upper end of the carrying ring (10); second adapting rollers (31) are arranged on both sides of the outer sides of the three second shock absorbers (29); two second adapting rollers (31) and two first adapting rollers (19) are fixedly connected via a connecting rod (33); one of the connecting rods (33) is rotatably connected to the second shock absorber (29) via a second supporting frame (30); another of the connecting rods (33) is rotatably connected to the first shock absorber (17) via a second connecting block (18); the three first adapting rollers (19) are rotatably connected via a first adapting transmission belt (20); and the three second adapting rollers (31) are transmission-connected via a second adapting transmission belt (32).

2. The device for welding and repairing damaged oil cylinder seal according to claim 1, characterized in that: A clamping gasket (23) is provided at one end of the first hydraulic telescopic rod (8), and the clamping gasket (23) is rotatably connected to one end of the first hydraulic telescopic rod (8) via a second rotating connecting shaft (24); a length-adapting sliding plate (7) is provided at the lower end of the outside of the first hydraulic telescopic rod (8); bidirectional threaded rods (6) are provided on both sides of the lower end of the outside of the length-adapting sliding plate (7); the outside of the bidirectional threaded rod (6) is threadedly matched with both sides of the lower end of the inside of the length-adapting sliding plate (7); a transverse sliding rail (5) is provided on the outside of the bidirectional threaded rod (6), and the transverse sliding rail (5) is slidably connected to the lower end of the outside of the length-adapting sliding plate (7).

3. The device for welding and repairing damaged oil cylinder seal according to claim 2, characterized in that: A second hydraulic telescopic rod (25) is arranged at each of the four corners of the lower end of the carrying ring (10); the four second hydraulic telescopic rods (25) are fixedly connected via a third fixing plate (26); a third hydraulic telescopic rod (27) is arranged between the third fixing plate (26) and the carrying ring (10); the third hydraulic telescopic rod (27) is fixedly connected to the third fixing plate (26) and the carrying ring (10); and a storage chamber (4) is arranged outside the second hydraulic telescopic rod (25).

4. The device for repairing damaged oil cylinder seal by welding according to claim 3, characterized in that: A first support frame (11) is arranged on one side outside the first fixing plate (1), a second fixing plate (12) is arranged on one side outside the first support frame (11), the second fixing plate (12) and the first support frame (11) are rotatably connected via a first rotating connecting shaft (13), a fixing ring (34) is arranged on the upper end of the second fixing plate (12), a one-way transmission threaded rod (37) is arranged inside the fixing ring (34), a sliding block (35) is arranged on one side outside the one-way transmission threaded rod (37), and the sliding block (35) cooperates with the external thread of the one-way transmission threaded rod (37).

5. The device for repairing damaged oil cylinder seal by welding according to claim 4, characterized in that: A welding repair gun (36) is provided on one side of the outside of the sliding block (35), and one end of the welding repair gun (36) is rotatably connected to the sliding block (35) via a third rotating connection shaft (38).

6. The device for repairing damaged oil cylinder seal by welding according to claim 5, characterized in that: The second hydraulic telescopic rod (25) is fixedly connected to the first fixing plate (1) via a connecting plate (28).

7. The repair method of the oil cylinder seal damaged welding repair device according to claim 6 is characterized in that: The steps include: Step 1: The motor drives the bidirectional threaded rod (6) to rotate, and the rotation of the bidirectional threaded rod (6) can generate relative motion with the length adaptation sliding plate (7). The length adaptation sliding plate (7) is restricted by the bidirectional threaded rod (6) and the rotational motion is converted into linear motion. The two length adaptation sliding plates (7) are adapted to the length of the oil cylinder to be welded and repaired by relative motion; Step 2: The first hydraulic telescopic rod (8) is extended and retracted to drive the clamping gasket (23) to fit the two ends of the oil cylinder, and the longitudinal bearing plate (9) is pushed by the telescopic device to slide longitudinally in the longitudinal sliding rail (21) through the third connecting block (22). The longitudinal sliding can drive the first shock absorber (17) to support, and then a pair of opposite first adapting rollers (19) are attached to the two sides of the outside of one end of the oil cylinder through the first adapting transmission belt (20); Step 3, the second fixing plate (12) is slid transversely on one side of the outside of the transverse sliding rail (5) through the first support frame (11) to the position to be welded and repaired, and the position of the welding repair gun (36) is adjusted at the welding and repair position. When the welding repair gun (36) overlaps with the longitudinal bearing plates (9) at both ends, the length of the longitudinal bearing plates (9) at the overlapping position is adapted to the transverse movement of the sliding plate (7), and the bearing ring (10) is driven upward by the contraction of the second hydraulic telescopic rod (25) to avoid overlapping. Step 4: The upward movement of the carrying ring (10) can drive the second adapting roller (31) and the second adapting transmission belt (32) to fit the lower end of the outer portion of the oil cylinder, and the two are fitted and fixed with one pair of longitudinal carrying sheets (9); Step 5: While being fixed, the first adapting roller (19) and the second adapting roller (31) can respectively drive the first adapting transmission belt (20) and the second adapting transmission belt (32) to rotate, and the second adapting transmission belt (32) and the first adapting transmission belt (20) that are in contact with the oil cylinder can drive the oil cylinder to rotate, and the clamping gasket (23) is rotated at one end of the first hydraulic telescopic rod (8) through the second rotating connecting shaft (24), and the position and direction to be welded are adjusted by rotation; Step 6: The sliding block (35) is driven to slide longitudinally on one side of the outside of the fixing ring (34) by the rotation of the one-way transmission threaded rod (37). While sliding, the welding repair gun (36) is rotated on one side of the outside of the sliding block (35) with the third rotating connecting shaft (38) as the center of the circle, and is fitted to the position to be welded and repaired to complete heating, and the cylinder welding repair position is performed.

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