CN110886928A - Auxiliary device for welding and repairing large-scale pipelines - Google Patents

Abstract

The invention discloses an auxiliary device for welding and repairing large-scale pipelines. A motor is fixedly installed on one side of the top surface, and a reducer is installed at the side end of the motor. The reducer is fixedly installed on the top surface of the counterweight plate. The input shaft of the reducer is fixedly connected to the output shaft of the motor through a coupling. A support plate is fixed on the other side of the top surface. Through the arrangement of electric telescopic rod, motor, first motor and hydraulic cylinder, the device can remotely control the above machinery to press the arc-shaped steel plate to the damaged pipe without manual pressing, which not only saves the labor of workers, but also effectively It prevents the leakage of the conveying medium and splashes on the workers, and the personal safety of the workers is guaranteed, and the setting of the hot air blower can quickly dry the leaked material at the welding place, thereby improving the work efficiency.

Description

Auxiliary device for welding and repairing large-scale pipelines

technical field

The invention relates to the field of pipeline repair, in particular to an auxiliary device for welding and repairing large-scale pipelines.

Background technique

At present, pipelines are usually used to realize long-distance liquid and gas transportation, which are widely used in surface or underground engineering, shipbuilding or offshore oil platforms, water, gas or natural gas supply, electricity, industrial production, sewage treatment and maintenance and other fields, such as crude oil pipelines , water supply/drainage lines, etc. During the use of the pipeline, due to factors such as itself or external factors, leakage or damage may occur, and emergency repairs are required. The repair process is completed under the normal transmission of the medium inside the pipeline. In the prior art, a pipeline repairer or a welding patch is often used to repair the damaged part of the pipeline. The long-term use of the pipeline repairer will inevitably reduce the sealing reliability until it completely fails, resulting in secondary leakage of the maintenance pipeline. Therefore, welding is mostly used. The patch technology is used to repair the damaged part of the pipeline. However, when this technology is implemented, it is difficult to manually press the patch steel plate on the damaged part of the pipeline due to the pressure of the conveying medium in the pipeline, and sometimes the conveying medium in the pipeline can be dangerous to people, so Direct contact is not possible, so an auxiliary device for welding and repairing large-scale pipelines is urgently needed to achieve the above-mentioned problems.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems, the present invention provides an auxiliary device for welding and repairing large-scale pipelines.

The present invention is achieved through the following technical solutions:

An auxiliary device for welding and repairing large pipelines, comprising a counterweight plate, electric telescopic rods are respectively fixed at the four corners of the edge of the counterweight plate, and a universal wheel is fixedly installed at the bottom end of the output end of the electric telescopic rod. A motor is fixedly installed on one side of the top surface of the weight plate, the side end of the motor is provided with a reducer, the reducer is fixedly installed on the top surface of the counterweight plate, and the input shaft of the reducer passes through the coupling and the motor. The output shaft is fixedly connected, a support plate is fixed on the other side of the top surface of the counterweight plate, a rotating block is embedded in the side wall of the support plate, and the rotating block is rotatably connected at the contact point of the support plate, and the side of the rotating block is A lead screw is fixed at one end, and the other end of the lead screw is fixedly connected with the output shaft of the reducer through a coupling. A battery and a hydraulic station are symmetrically arranged on both sides of the bar, and the battery and the hydraulic station are fixedly installed on the top surface of the counterweight plate. A T-shaped slider slides in the T-shaped chute, the top of the T-shaped slider protrudes from the T-shaped chute and is fixedly connected to the bottom end of the lead screw nut, the top of the lead screw nut is fixed with a cylinder, and the cylinder It is formed by splicing a first arc-shaped plate and a second arc-shaped plate, one end of the first arc-shaped plate and the second arc-shaped plate is hingedly arranged through a hinge, and the other end of the first arc-shaped plate is fixed with a transverse plate. The other end of the horizontal plate is provided with a U-shaped opening, the other end of the second arc-shaped plate is fixed with a fixed rod, and the other end of the fixed rod is hinged with a threaded rod through a pin, and the top of the threaded rod passes through A locking nut is screwed through the U-shaped opening, an internal gear is fixedly sleeved in the cylinder, the internal gear is arranged on one side of the inner arc surface of the cylinder, and the center of the inner arc surface of the cylinder is annularly opened with a first gear. A T-shaped chute, a first T-shaped sliding block slides in the first T-shaped sliding groove, the top of the first T-shaped sliding block protrudes from the first T-shaped sliding groove and a mounting plate is fixed, and the mounting plate is The bottom is an arc-shaped surface, a first motor is fixedly installed on the top surface of the mounting plate, a first reducer is arranged on one side of the first motor, and the first reducer is fixedly installed on the top surface of the mounting plate, so The input shaft of the first reducer is fixedly connected with the output shaft of the first motor through a coupling, the output shaft of the first reducer is fixedly sleeved with a gear, the gear meshes with the internal gear, and the first motor The other side is provided with a hydraulic cylinder, the hydraulic cylinder is fixedly installed on the top surface of the mounting plate, the side end of the first motor is provided with a hot air blower, the hot air blower is fixedly installed on the top surface of the mounting plate, and the hydraulic A disc is fixedly installed on the top of the output end of the cylinder, and a square spring cylinder is fixed at the center of the top surface of the disc. A plurality of nozzles are evenly fixed on the top surface of the ring, the nozzles communicate with the inner cavity of the ring, and a connecting pipe is fixed at the side end of the ring, the connecting pipe communicates with the internal cavity of the ring, and the connecting pipe The other end is fixedly connected with a telescopic hose, and the other end of the telescopic hose is communicated with the air outlet of the hot air blower. A square slider is slidably arranged in the square spring cylinder, and the bottom end of the square slider is connected to the inner bottom of the square spring cylinder. A spring is fixed between the ends, and the spring It is arranged in a square spring cylinder, the top of the square slider is fixed with a sliding rod, the top of the sliding rod protrudes from the square spring cylinder and is fixed with a fixed plate, the top surface of the fixed plate is an arc-shaped concave surface, and the bottom end of the fixed plate is The four corners are respectively screwed with locking bolts, the top surface of the fixing plate is fitted with an arc-shaped steel plate, and the bottom surface of the arc-shaped steel plate is provided with four threaded holes, and the four threaded holes are respectively connected with the four locking bolts Correspondingly, the top ends of the four locking bolts are respectively inserted into the four threaded holes and are threadedly connected with them. A mounting groove is formed in the center of the inner arc surface of the arc-shaped steel plate, and a rubber pad is fixed in the mounting groove.

Preferably, the hydraulic cylinder is connected to the pipeline of the hydraulic station through a conduit.

Preferably, the electric telescopic rod, the motor, the first motor and the hot air blower are respectively electrically connected to the battery through wires.

Preferably, both the motor and the first motor are YLT160M-4/11KW waterproof motors.

Preferably, the hot air blower is a COLOR 3000 watt warm air blower.

Compared with the prior art, the beneficial effect of the present invention is that: the device can remotely control the above machinery to press the arc-shaped steel plate to the damaged part of the pipeline through the arrangement of the electric telescopic rod, the motor, the first motor and the hydraulic cylinder. Manual pressing is required, which not only saves the labor of the workers, but also effectively prevents the leakage of the conveying medium and splashes on the workers. The personal safety of the workers is guaranteed, and the setting of the hot air blower can quickly dry and speed up the welding. The leakage of material liquid at the place, thereby improving the work efficiency.

Description of drawings

Fig. 1 is the structure diagram of the structure of the present invention;

Fig. 2 is the side view of the structure Fig. 1 of the present invention;

Fig. 3 is an enlarged view of part A of Fig. 2 of the structure according to the present invention.

In the picture: counterweight plate 1, electric telescopic rod 2, universal wheel 3, motor 4, reducer 5, support plate 6, rotating block 7, lead screw 8, lead screw nut 9, T-shaped chute 10, T-shaped Slider 11, cylinder 12, first arc plate 12-1, second arc plate 12-2, hinge 13, fixed rod 14, pin 15, transverse plate 16, threaded rod 17, lock nut 18, U-shaped opening 19 , first T-shaped chute 20 , first T-shaped sliding block 21 , internal gear 22 , mounting plate 23 , first motor 24 , first reducer 25 , gear 26 , hydraulic cylinder 27 , hot air blower 28 , disc 29, ring 30, spray head 31, connecting pipe 32, telescopic hose 33, square spring cylinder 34, square slider 35, spring 36, sliding rod 37, fixed plate 38, curved steel plate 39, rubber pad 40 , Locking bolt 41, threaded hole 42, installation slot 43, battery 44, hydraulic station 45.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

As shown in Figures 1, 2 and 3, an auxiliary device for welding and repairing large pipelines includes a counterweight plate 1, and electric telescopic rods 2 are respectively fixed at the four corners of the edge of the counterweight plate 1. The electric telescopic rods A universal wheel 3 is fixedly installed at the bottom end of the output end of 2, a motor 4 is fixedly installed at one side of the top surface of the counterweight plate 1, and a reducer 5 is installed at the side end of the motor 4, and the reducer 5 is fixedly installed On the top surface of the counterweight plate 1, the input shaft of the reducer 5 is fixedly connected to the output shaft of the motor 4 through a coupling, and a support plate 6 is fixed on the other side of the top surface of the counterweight plate 1. The said A rotating block 7 is embedded on the side wall of the support plate 6, and the rotating block 7 is rotatably connected to the contact point of the support plate 6. The side end of the rotating block 7 is fixed with a lead screw 8, and the other end of the lead screw 8 passes through a coupling It is fixedly connected with the output shaft of the reducer 5, the lead screw 8 is covered with a lead screw nut 9, the lead screw nut 9 is threadedly connected with the lead screw 8, and the two sides of the lead screw 8 are respectively provided with a battery 44 and a battery. The hydraulic station 45, the battery 44 and the hydraulic station 45 are fixedly installed on the top surface of the counterweight plate 1, and a T-shaped chute 10 is opened on the top surface of the counterweight plate 1 at the lower end of the lead screw 8. A T-shaped sliding block 11 slides in the sliding slot 10. The top of the T-shaped sliding block 11 protrudes from the T-shaped sliding slot 10 and is fixedly connected to the bottom end of the screw nut 9. The top end of the screw nut 9 is fixed with a cylinder 12. , the cylinder 12 is formed by splicing a first arc-shaped plate 12-1 and a second arc-shaped plate 12-2, and one end of the first arc-shaped plate 12-1 and the second arc-shaped plate 12-2 passes through The hinge 13 is hingedly arranged, a transverse plate 16 is fixed at the other end of the first arc-shaped plate 12-1, a U-shaped opening 19 is opened at the other end of the transverse plate 16, and the second arc-shaped plate 12-2 A fixed rod 14 is fixed at the other end, a threaded rod 17 is hinged at the other end of the fixed rod 14 through a pin 15, and the top of the threaded rod 17 is screwed with a locking nut 18 through the U-shaped opening 19. 12 is fixedly sleeved with an internal gear 22, the internal gear 22 is arranged at one side of the inner arc surface of the cylinder 12, and a first T-shaped chute 20 is annularly opened at the center of the inner arc surface of the cylinder 12. A first T-shaped sliding block 21 slides in a T-shaped sliding slot 20. The top of the first T-shaped sliding block 21 protrudes from the first T-shaped sliding groove 20 and is fixed with a mounting plate 23. The bottom of the mounting plate 23 is an arc. A first motor 24 is fixedly installed on the top surface of the mounting plate 23 , a first reducer 25 is arranged on one side of the first motor 24 , and the first reducer 25 is fixedly installed on the top surface of the mounting plate 23 , the input shaft of the first reducer 25 is fixedly connected to the output shaft of the first motor 24 through a coupling, and the output shaft of the first reducer 25 is fixedly sleeved with a gear 26, and the gear 26 is connected to the inner The gears 22 are engaged, the other side of the first motor 24 is provided with a hydraulic cylinder 27, the hydraulic cylinder 27 is fixedly installed on the top surface of the mounting plate 23, and the side end of the first motor 24 is provided with a hot air blower 28, so The hot air blower 28 is fixedly installed on the top surface of the mounting plate 23, and the top of the output end of the hydraulic cylinder 27 is fixedly installed with a disc 29. A square spring cylinder 34 is fixed at the center of the surface, a circular ring 30 is sleeved on the outer side of the square spring cylinder 34, a cavity is arranged in the wall of the circular ring 30, and a plurality of nozzles are evenly fixed on the top surface of the circular ring 30 31. The spray head 31 communicates with the inner cavity of the ring 30, the side end of the ring 30 is fixed with a connecting pipe 32, the connecting pipe 32 communicates with the inner cavity of the ring 30, and the other end of the connecting pipe 32 is A telescopic hose 33 is fixedly connected, and the other end of the telescopic hose 33 is communicated with the air outlet of the hot air blower 28. A square slider 35 is slidably arranged in the square spring cylinder 34, and the bottom end of the square slider 35 is connected to the square spring. A spring 36 is fixed between the inner and bottom ends of the cylinder 34, the spring 36 is arranged in the square spring cylinder 34, the top of the square slider 35 is fixed with a sliding rod 37, and the top of the sliding rod 37 protrudes from the square spring cylinder 34 A fixed plate 38 is fixed, the top surface of the fixed plate 38 is an arc-shaped concave surface, the four corners of the bottom end of the fixed plate 38 are respectively screwed with locking bolts 41, and the top surface of the fixed plate 38 is fitted with an arc-shaped surface. The steel plate 39 has four threaded holes 42 on the bottom surface of the curved steel plate 39. The four threaded holes 42 are respectively arranged corresponding to the four locking bolts 41, and the tops of the four locking bolts 41 are respectively inserted into the four threaded holes 42. A mounting groove 43 is formed at the center of the inner arc surface of the arc-shaped steel plate 39, and a rubber pad 40 is fixed in the mounting groove 43.

The hydraulic cylinder 27 is connected to the hydraulic station 45 via a pipeline.

The electric telescopic rod 2 , the motor 4 , the first motor 24 and the hot air blower 28 are respectively electrically connected to the battery 44 through wires.

The motor 4 and the first motor 24 are both YLT160M-4/11KW waterproof motors.

The hot air blower 28 is a COLOR 3000 watt heater.

Working principle: when the present invention is in use, first loosen the lock nut 18, and swing the top end of the threaded rod 17 counterclockwise with the pin 15 as the axis, so that the threaded rod 17 will open from the U-shaped opening at the side end of the horizontal plate 16. 19 slide out, and then manually lift one end of the first arc-shaped plate 12-1 through the horizontal plate 16, so that the other end of the first arc-shaped plate 12-1 rotates clockwise with the hinge 13 as the axis, thereby making the The first arc-shaped plate 12-1 is moved from the top of the second arc-shaped plate 12-2 to its side end, and then the device is manually pushed, and the worker can easily push the device to the required position through the setting of the universal wheel 3. The lower end of the pipeline is repaired, so that the counterweight plate 1 is located at the right lower end of the pipeline repair place, and the second arc plate 12-2 is located at the side end of the pipeline repair place, so that the conveying medium in the pipeline will not pass through damage. It leaks to the second arc-shaped plate 12-2, which will not affect the adjustment work of the second arc-shaped plate 12-2. When the device is pushed to the lower end of the pipeline to be repaired, the electric telescopic rod 2. Connect with the battery 44 through the wire, and simultaneously start the output ends of the four electric telescopic rods 2 to extend or retract, so that the distance between the counterweight plate 1 and the ground changes, so the second arc plate 12-2 The distance between the pipe and the pipe will also change, and then the distance between the inner arc surface of the second arc plate 12-2 and the pipe can be adjusted by controlling the electric telescopic rod 2, so that the second arc plate 12-2 can be effectively made. The axis line of 2 is adjusted to be consistent with the axis line of the pipeline, and then the first arc-shaped plate 12-1 is put back in its original position, so that the first arc-shaped plate 12-1 and the second arc-shaped plate 12-2 are composed of A complete cylinder 12, then slide the threaded rod 17 into the U-shaped opening 19, and tighten the lock nut 18, so that the splicing of the first arc-shaped plate 12-1 and the second arc-shaped plate 12-2 is tightly attached Then, according to the external radian of the pipeline to be repaired, an arc-shaped steel plate 39 that matches the external radian of the pipeline is selected, and the arc-shaped steel plate 39 is fixed to the arc-shaped concave on the top surface of the fixing plate 38 through the locking bolt 41. Then start the motor 4, and drive the reducer 5 to run through the motor 4, so that the output shaft of the reducer 5 will drive the lead screw 8 to rotate, and when the lead screw 8 rotates, it can drive the lead screw nut 9 to move left and right, and the lead screw nut 9. When moving left and right, the cylinder 12 is driven to move synchronously, and then the cylinder 12 can be moved to the damaged pipe through the motor 4, and then the first motor 24 and the hot air blower 28 are respectively activated. After the first motor 24 is activated, it passes through the first deceleration The gear 25 drives the gear 26 to rotate. When the gear 26 rotates, it will rotate along the inner arc surface of the internal gear 22. Since the mounting plate 23 is fixedly connected with the first T-shaped slider 21, the gear 26 will simultaneously drive the mounting plate 23 to rotate around the pipe. In this way, when the inner arc surface of the arc-shaped steel plate 39 is directly opposite to the damaged part of the pipeline, the operation of the first motor 24 is stopped, and the output end of the hydraulic cylinder 27 is controlled by the hydraulic station 45 to extend, so that the inner arc surface of the arc-shaped steel plate 39 is Fit the damaged part of the pipeline, so that the rubber pad 40 in the installation groove 43 on the inner arc surface of the arc-shaped steel plate 39 will squeeze the pipeline Due to the setting of the square spring cylinder 34, the spring 36 provided in it can effectively buffer the force of the hydraulic cylinder 27 to move the pipeline, thereby effectively playing a protective role, and the hot air blower The hot air blown from 28 will pass through the telescopic hose 33, the connecting pipe 32, the ring 30 and the nozzle 31 in turn to the contact point between the arc-shaped steel plate 39 and the pipeline, which can effectively speed up the leakage of the leakage medium at the contact point between the arc-shaped steel plate 39 and the pipeline. The drying work can speed up the welding work between the arc-shaped steel plate 39 and the pipeline, so that when the leakage of the conveying medium at the damaged part of the pipeline is stopped, and the leakage medium at the contact between the arc-shaped steel plate 39 and the pipeline is dried, it can be Perform the welding work between the arc-shaped steel plate 39 and the pipeline. According to the above, this auxiliary device for welding and repairing large pipelines can use the electric telescopic rod 2, the motor 4, the first motor 24 and the hydraulic cylinder 27 to weld the arc-shaped steel plate 39. Pressing to the damaged part of the pipeline does not require manual pressing, which not only saves the labor of the workers, but also effectively prevents the leakage of the conveying medium and splashes on the workers. The personal safety of the workers is guaranteed. The setting can quickly dry the leaked material at the welding place, thereby improving the work efficiency. After the welding between the arc-shaped steel plate 39 and the pipeline is completed, the locking bolt 41 is loosened, and the fixing plate 38 and the arc-shaped steel plate 39 are separated to complete the auxiliary work of welding and repairing the damaged part of the pipeline.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. An auxiliary device for welding and repairing large-scale pipelines, comprising a counterweight plate (1), characterized in that: electric telescopic rods (2) are respectively fixed at the four corners of the edge of the counterweight plate (1), and the electric telescopic rods A universal wheel (3) is fixedly installed at the bottom end of the output end of (2), a motor (4) is fixedly installed at one side of the top surface of the counterweight plate (1), and a speed reducer is installed at the side end of the motor (4). The speed reducer (5) is fixedly installed on the top surface of the counterweight plate (1), and the input shaft of the speed reducer (5) is fixedly connected with the output shaft of the motor (4) through a coupling, A support plate (6) is fixed on the other side of the top surface of the counterweight plate (1), a rotating block (7) is embedded on the side wall of the support plate (6), and the rotating block (7) is connected to the support plate (6) The contact point is connected in rotation, the side end of the rotating block (7) is fixed with a lead screw (8), and the other end of the lead screw (8) is fixedly connected with the output shaft of the reducer (5) through a coupling, The lead screw (8) is covered with a lead screw nut (9), the lead screw nut (9) is threadedly connected with the lead screw (8), and batteries (44) are symmetrically arranged on both sides of the lead screw (8). ) and a hydraulic station (45), the battery (44) and the hydraulic station (45) are fixedly installed on the top surface of the counterweight plate (1), and the counterweight plate (1) at the lower end of the lead screw (8) A T-shaped sliding groove (10) is opened on the top surface, a T-shaped sliding block (11) slides in the T-shaped sliding groove (10), and the top of the T-shaped sliding block (11) protrudes from the T-shaped sliding groove ( 10) It is fixedly connected with the bottom end of the lead screw nut (9), the top end of the lead screw nut (9) is fixed with a cylinder (12), and the cylinder (12) is composed of the first arc plate (12-1) and The second arc-shaped plate (12-2) is spliced together, and one end of the first arc-shaped plate (12-1) and the second arc-shaped plate (12-2) is hingedly arranged through a hinge (13), and the A transverse plate (16) is fixed at the other end of the first arc-shaped plate (12-1), a U-shaped opening (19) is opened at the other end of the transverse plate (16), and the second arc-shaped plate (12- 2) A fixing rod (14) is fixed at the other end, a threaded rod (17) is hinged at the other end of the fixing rod (14) through a pin (15), and the top end of the threaded rod (17) passes through the U-shaped opening ( 19) A locking nut (18) is screwed, an internal gear (22) is fixedly sleeved in the cylinder (12), and the internal gear (22) is arranged on one side of the inner arc surface of the cylinder (12), A first T-shaped chute (20) is annularly opened at the center of the inner arc surface of the cylinder (12), and a first T-shaped slider (21) slides in the first T-shaped chute (20), so The top of the first T-shaped slider (21) protrudes from the first T-shaped chute (20) and is fixed with a mounting plate (23), the bottom of the mounting plate (23) is an arc surface, and the mounting plate (23) A first motor (24) is fixedly installed on the top surface, a first reducer (25) is arranged on one side of the first motor (24), and the first reducer (25) is fixedly installed on the mounting plate (23) On the top surface, the input shaft of the first reducer (25) is connected to the first motor (24) through a coupling ) is fixedly connected to the output shaft of the first reducer (25), a gear (26) is fixedly sleeved on the output shaft of the first reducer (25), the gear (26) meshes with the internal gear (22), and the first motor (24) The other side is provided with a hydraulic cylinder (27), the hydraulic cylinder (27) is fixedly installed on the top surface of the mounting plate (23), and the side end of the first motor (24) is provided with a hot air blower (28), so The hot air blower (28) is fixedly installed on the top surface of the mounting plate (23), the top of the output end of the hydraulic cylinder (27) is fixedly installed with a disk (29), and the center of the top surface of the disk (29) is fixed There is a square spring cylinder (34), a circular ring (30) is sleeved on the outer side of the square spring cylinder (34), a cavity is provided in the wall of the circular ring (30), and the top surface of the circular ring (30) is provided A plurality of spray heads (31) are evenly fixed, the spray heads (31) communicate with the inner cavity of the ring (30), and a connecting pipe (32) is fixed on the side end of the ring (30). The connecting pipe (32) ) is communicated with the inner cavity of the ring (30), the other end of the connecting pipe (32) is fixedly connected with a telescopic hose (33), and the other end of the telescopic hose (33) is connected to the air outlet of the hot air blower (28). A square slider (35) is slidably arranged in the square spring cylinder (34), and a spring (36) is fixed between the bottom end of the square slider (35) and the inner bottom end of the square spring cylinder (34). , the spring (36) is arranged in the square spring cylinder (34), the top of the square slider (35) is fixed with a sliding rod (37), and the top of the sliding rod (37) protrudes from the square spring cylinder (34) A fixing plate (38) is fixed, the top surface of the fixing plate (38) is an arc-shaped concave surface, and four corners of the bottom end of the fixing plate (38) are respectively screwed with locking bolts (41). ) An arc-shaped steel plate (39) is placed on the top surface, and four threaded holes (42) are formed on the bottom surface of the arc-shaped steel plate (39), and the four threaded holes (42) are respectively connected with four locking bolts ( 41) Correspondingly, the top ends of the four locking bolts (41) are respectively inserted into the four threaded holes (42) and are threadedly connected with them, and a mounting groove ( 43), a rubber pad (40) is fixed in the installation groove (43). 2 . The auxiliary device for welding and repairing large pipelines according to claim 1 , wherein the hydraulic cylinder ( 27 ) is connected to the pipeline of the hydraulic station ( 45 ) through a conduit. 3 . 3. An auxiliary device for welding and repairing large pipelines according to claim 1, characterized in that: the electric telescopic rod (2), the motor (4), the first motor (24) and the hot air blower (28) are respectively It is electrically connected to the battery (44) through wires. 4. An auxiliary device for welding and repairing large pipelines according to claim 1, wherein the motor (4) and the first motor (24) are both YLT160M-4/11KW waterproof motors. 5. An auxiliary device for welding and repairing large pipelines according to claim 1, characterized in that: the hot air blower (28) is a COLOR 3000 watt warm air blower.

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