Auxiliary device for girth welding of pressure steel pipe of pumped storage power station

Abstract

The invention discloses a pumped storage power station pressure steel pipe girth welding auxiliary device which comprises a machine base, a pipe opening roller, a movable machine frame, a chain block, a rotating supporting arm, a welding equipment supporting plate, a balance weight, a rolling wheel and a roller and can be matched with a rolling frame to drive a pressure steel pipe to rotate. The machine base is arranged in the axial direction of the steel pipe. The end pipe opening rollers bear the pipe opening end and allow the steel pipe to rotate around the shaft. The movable rack is supported on the longitudinal main beam of the machine base through rolling wheels and moves in the axial direction to achieve welding position centering. The rotating support arm is hinged to the rack, and the chain block is vertically hung to the rack and the support arm so as to adjust and maintain the pitch angle. The supporting plate is rotationally connected to the free end of the supporting arm so that circumferential fine adjustment can be achieved and welding equipment can be borne. The balance weight improves stability, and the roller assists smooth movement to adapt to pipe joints with different lengths. According to the method, the labor intensity of welders can be effectively reduced, and the uniformity and stability of the welding quality of the girth between pipe joints of the pressure steel pipe are guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydropower engineering construction, and particularly relates to a penstock ring joint welding auxiliary device for pumped storage power station. BACKGROUND

[0002] In the installation process of the penstock of the pumped storage power station, the ring joint welding is one of the key processes. The traditional welding method mainly relies on manual operation of the welding gun, which is not only labor-intensive and low in efficiency, but also greatly affected by the technical level of the welder, and the consistency of the weld is difficult to guarantee. In addition, the diameter of the penstock is large, and the wall thickness is thick, so the position of the welding gun needs to be frequently adjusted during the welding process, which is inconvenient to operate and easy to cause welding defects. At present, although there are some welding auxiliary devices, they are complex in structure and high in cost, and cannot meet the needs of rapid installation and adjustment on site. Specifically, the existing auxiliary devices often lack the ability to continuously adjust the spatial position (axial, radial and pitch angle) of the welding gun in an integrated and mechanized manner, or are difficult to be stably locked after adjustment, which still requires frequent manual intervention during the welding process, and it is difficult to truly realize mechanized operation with high quality and high efficiency. Therefore, a welding auxiliary device with simple structure, flexible operation and low cost is needed to improve the efficiency and quality of ring joint welding. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a penstock ring joint welding auxiliary device for pumped storage power station, which can effectively reduce the labor intensity of welders and guarantee the uniformity and stability of the ring joint welding quality of the penstock.

[0004] The technical scheme of the present application is as follows: A penstock ring joint welding auxiliary device for pumped storage power station, comprising a base, a pipe opening roller, a movable frame, a hand-operated hoist, a rotating support arm, a welding equipment support plate, a counterweight, a rolling wheel and a roller, the base is arranged along the axial direction of the penstock, the pipe opening roller is arranged at one end of the base and used to support the pipe opening end of the penstock, the movable frame is arranged above the base and moves along the length direction of the base, the bottom of the movable frame is provided with rolling wheels on both sides, and the rolling wheels are rolling supported on the longitudinal girder of the base; the top of the movable frame is provided with a hand-operated hoist hanging point, one end of the rotating support arm is hinged to the movable frame, the upper end of the hand-operated hoist is connected to the hand-operated hoist hanging point, and the lower end of the hand-operated hoist is connected to the hanging point on the rotating support arm; the welding equipment support plate is arranged at the free end of the rotating support arm and used to support the welding equipment, the counterweight is arranged on the movable frame, and the roller is arranged at the lower part of the movable frame.

[0005] Further, the base comprises a steel plate, a support H-shaped steel, a square steel pipe one, a round steel pipe one, an H-shaped steel one, an H-shaped steel two, a roller support plate and an H-shaped steel three, the steel plate is placed on the ground and is fixedly connected with one end of the support H-shaped steel perpendicularly, the other end of the support H-shaped steel is fixedly connected with the longitudinal main beam of the base; the longitudinal main beam of the base is composed of two long H-shaped steels one arranged in parallel and at intervals, the H-shaped steel three, the round steel pipe one and the square steel pipe one are sequentially arranged at intervals along the longitudinal direction between the H-shaped steels one, the H-shaped steel two is fixedly connected with the side surface of the H-shaped steel three; the roller support plate is fixedly connected with the H-shaped steel two, and the pipe roller is arranged on the roller support plate.

[0006] Further, the mobile frame is a door-shaped frame structure, comprising a rolling wheel support plate one, a square steel pipe two, a rolling wheel support plate two, a round steel one, a square steel pipe three, a square steel pipe four, a hand-operated hoist lug one, a rotating support arm fixed plate and a square steel pipe five, the two ends of the square steel pipe three are fixedly connected with one end of the two square steel pipes five perpendicularly to form a door-shaped structure, the other end of the square steel pipe five is fixedly connected with one end of the square steel pipe two perpendicularly; the rolling wheel support plate one and the rolling wheel support plate are fixedly connected below the two ends of the square steel pipe two respectively, and the rolling wheels are arranged on the rolling wheel support plate one and the rolling wheel support plate; the hand-operated hoist lug one is fixedly connected with the top end of the square steel pipe four, the bottom end of the square steel pipe four is fixedly connected with the side surface of the square steel pipe three perpendicularly; the rotating support arm fixed plate is fixedly connected with the side surface of the square steel pipe five; the round steel one is fixedly connected with the upper side surface of the square steel pipe two and corresponds to the mounting position of the counterweight, and the round steel one passes through the limiting hole on the counterweight.

[0007] Further, the rotating support arm comprises a square steel pipe six, a hand-operated hoist lug two, a steel pipe, a steel plate, a round steel two and a steel strip, two square steel pipes six are arranged in parallel as main arms and are fixedly connected through the round steel two and the steel strip welded therebetween; the steel pipe is rotatably connected with one end of the main arm, the steel pipe serves as a rotating shaft and is hingedly connected with the rotating support arm fixed plate on the mobile frame; the round steel two serves as a mounting shaft for the welding equipment support plate to be sleeved, the steel plate is welded between the two square steel pipes six transversely, and the hand-operated hoist lug is fixedly connected with the steel plate.

[0008] Further, the welding equipment support plate comprises a support steel plate and a round steel pipe two, the round steel pipe two is fixedly connected with one side edge of the support steel plate and is sleeved outside the round steel two at the end of the rotating support arm, so as to form a rotating connection.

[0009] Further, a rolling frame is further included, the rolling frame is arranged on one side of the base, the pipe wall of the pressure steel pipe is connected with the rollers on the rolling frame, and the pressure steel pipe rotates around its axis through the rollers on the rolling frame.

[0010] The present application has at least the following beneficial effects relative to the prior pressure steel pipe girth welding auxiliary mode relying on manual alignment and repeated adjustment: 1. Faster and more accurate axial positioning: the moving frame rolls on the longitudinal main beam of the machine base through the rolling wheels and can move along the axial direction of the steel pipe, realizing the axial alignment of the welding equipment at the girth, reducing the error accumulation and time consumption caused by repeated measurement and review and moving.

[0011] 2. Adjustable and maintainable welding gun posture: the rotating arm is hinged to the moving frame, and the hoist is hung up and down to form a controllable pitch adjustment mechanism, which can realize continuous adjustment of the welding gun angle under different pipe diameters and different bevel postures, and can be stably maintained at the target angle, reducing the weld forming fluctuation caused by angle drift during welding.

[0012] 3. Improved centring accuracy of circumferential fine adjustment: the support plate of the welding equipment is rotatably connected at the free end of the arm, which can make circumferential fine adjustment of the welding gun, so that the welding gun is more easily aligned with the center line of the bevel and the root position, improving the fusion quality and reducing the probability of defects such as undercut, incomplete penetration and offset welding.

[0013] 4. Higher overall stability and greater safety margin: the counterweight is arranged on the moving frame to form an anti-overturning moment, which can offset the unbalanced load caused by the extension of the arm and the weight of the welding equipment, making the device more stable under the conditions of angle adjustment, welding and steel pipe rotation vibration, and reducing the risk of overturning and displacement.

[0014] 5. Adapt to different lengths of pipe sections and reduce downtime adjustment: the roller is arranged at the lower part of the moving frame to assist the smooth movement of the frame, which can quickly complete the re-alignment when the axial position of the girth changes due to the change of the length of the pipe section, improving the efficiency of section replacement and sequence change.

[0015] 6. Simplified construction organization and lower comprehensive cost: the device adopts a modular structure of the machine base and the frame, which is easy to set up and disassemble on site, can reduce the high-intensity manual support and temporary support, reduce the labor input and rework risk, and improve the continuity and consistency of the welding operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of a pressure steel pipe girth welding auxiliary device for pumped storage power stations of the present application.

[0017] Figure 2 is a structural schematic view of a machine base of a pressure steel pipe girth welding auxiliary device for pumped storage power stations of the present application.

[0018] Figure 3 is a structural schematic view of a pipe opening roller of a pressure steel pipe girth welding auxiliary device for pumped storage power stations of the present application.

[0019] Figure 4This is a schematic diagram of the structure of a pumped storage power station pressure steel pipe circumferential weld auxiliary device on a moving frame according to the present invention.

[0020] Figure 5 This is a schematic diagram of the rotating support arm of an auxiliary device for circumferential welding of pressure steel pipes in a pumped storage power station according to the present invention.

[0021] Figure 6 This is a schematic diagram of the welding equipment support plate of an auxiliary device for circumferential welding of pressure steel pipes in a pumped storage power station according to the present invention.

[0022] Figure 7 This is a schematic diagram of the counterweight structure of an auxiliary device for circumferential welding of pressure steel pipes in a pumped storage power station according to the present invention.

[0023] Figure 8 This is a schematic diagram of the structure of the rolling wheel of an auxiliary device for circumferential welding of pressure steel pipes in a pumped storage power station according to the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of a drum in an auxiliary device for circumferential welding of pressure steel pipes in a pumped storage power station, according to the present invention.

[0025] Figure 10 This is a schematic diagram of the working state of an auxiliary device for circumferential welding of pressure steel pipes in a pumped storage power station according to the present invention.

[0026] In the diagram: 1-Base, 2-Pipe roller, 3-Mobile frame, 4-Hand-operated hoist, 5-Rotating support arm, 6-Welding equipment support plate, 7-Counterweight, 8-Rolling wheel, 9-Roller, 10-Pressure steel pipe, 11-Rolling frame, 11-Steel plate, 12-H-beam support leg, 13-Square steel pipe one, 14-Round steel pipe one, 15-H-beam one, 16-H-beam two, 17-Roller support plate, 18-H-beam three, 3 1-Rolling wheel support plate one, 32-Square steel pipe two, 33-Rolling wheel support plate two, 34-Round steel one, 35-Square steel pipe three, 36-Square steel pipe four, 37-Hand-operated hoist lifting lug one, 38-Rotating arm fixing plate, 39-Square steel pipe five, 51-Square steel pipe six, 52-Hand-operated hoist lifting lug two, 53-Steel pipe, 54-Steel plate, 55-Round steel two, 56-Steel bar, 61-Support steel plate, 62-Round steel pipe two. Detailed Implementation

[0027] like Figures 1-10 As shown, this embodiment provides an auxiliary device for circumferential welding of pressure steel pipes in a pumped storage power station. It is used to provide welding equipment support, centering adjustment and welding stability for circumferential welding of pressure steel pipes 10. The auxiliary device mainly includes a base 1, pipe end rollers 2, a movable frame 3, a hand-operated hoist 4, a rotating support arm 5, a welding equipment support plate 6, a counterweight 7, rolling wheels 8 and a roller 9, and works with a rolling frame 11 to realize the rotation of pressure steel pipes 10.

[0028] For the convenience of description, the axial direction of the pressure steel pipe 10 is defined as the longitudinal direction of the device, the base 1 is arranged along the longitudinal direction, the moving frame 3 moves on the base 1 along the longitudinal direction to complete the axial alignment of the welding position, the vertical direction is defined as the height direction, the rotating arm 5 swings in the vertical plane around the hinge between the rotating arm 5 and the moving frame 3 to adjust the height position and the pitch angle of the welding equipment, and the welding equipment support plate 6 rotates around the rotating connection axis between the rotating arm 5 and the free end of the rotating arm 5 to realize the circumferential fine adjustment of the welding equipment.

[0029] The base 1 is a floor type bearing platform, the bottom of which is provided with a steel plate 11, the steel plate 11 is placed on the ground and serves as the bottom bearing surface of the base, the steel plate 11 is fixedly connected perpendicularly with one end of an H-shaped steel 12, the other end of the H-shaped steel 12 is fixedly connected with the longitudinal main beam of the base 1, thereby forming a stable floor support structure.

[0030] The longitudinal main beam of the base 1 is composed of two parallel and spaced H-shaped steels one 15, the two H-shaped steels one 15 extend along the longitudinal direction and are located on both sides of the base 1, a plurality of transverse connecting members including H-shaped steels three 18, round steel pipes one 14 and square steel pipes one 13 are arranged and fixedly connected in sequence along the longitudinal direction between the two H-shaped steels one 15, and the above-mentioned transverse connecting members are welded and fixed with the two H-shaped steels one 15 to form a space frame, which is used to improve the overall stiffness and torsional resistance of the base 1 in the longitudinal and transverse directions.

[0031] An H-shaped steel two 16 is arranged at one end of the base 1, the H-shaped steel two 16 is fixedly connected with the side surface of the H-shaped steel three 18, so that the end mounting area is rigidly connected with the base body as a whole, a roller support plate 17 is arranged on the end mounting area of the base 1, the roller support plate 17 is fixedly connected with the H-shaped steel two 16, and the pipe mouth roller 2 is mounted on the roller support plate 17.

[0032] A counterweight mounting area is further arranged on the base 1, the counterweight mounting area is located at a position below the side of the moving frame 3, and is used to mount the corresponding bearing and limiting structure of the counterweight 7, so that the gravity of the counterweight 7 is transmitted to the base 1 through the moving frame 3.

[0033] The pipe mouth roller 2 is arranged at one end of the base 1 and is specifically mounted on the roller support plate 17, the roller support plate 17 is fixedly connected with the H-shaped steel two 16, the wheel shaft of the pipe mouth roller 2 is rotatably mounted on the roller support plate 17, so that the pipe mouth roller 2 rotates relative to the roller support plate 17, the pipe mouth roller 2 is located at a supporting position below the pipe mouth end of the pressure steel pipe 10, and in use, the outer circumference of the pipe mouth end of the pressure steel pipe 10 falls on the pipe mouth roller 2, which provides support and allows the pressure steel pipe 10 to rotate around its own axis.

[0034] The mobile frame 3 is arranged above the base 1 and is a portal frame structure, including rolling wheel support plate one 31, square steel tube two 32, rolling wheel support plate two 33, round steel one 34, square steel tube three 35, square steel tube four 36, hand chain block lifting lug one 37, rotating support arm fixing plate 38 and square steel tube five 39.

[0035] The upper beam of the portal frame adopts the square steel tube three 35, which is arranged in the transverse direction. Two square steel tube fives 39 are used as the two side columns of the portal frame. The two ends of the square steel tube three 35 are fixedly connected with the one end of the two square steel tube fives 39 in the vertical direction, forming a door-shaped upper frame. The other end of the two square steel tube fives 39 is fixedly connected with the one end of the square steel tube two 32 in the vertical direction. The square steel tube two 32 is arranged in the longitudinal direction and is used as the bottom connecting beam of the portal frame. Thus, the square steel tube three 35, the square steel tube five 39 and the square steel tube two 32 form a closed portal main frame. The square steel tube four 36 is an auxiliary column component, the bottom end of which is fixedly connected with the top side of the square steel tube three 35 in the vertical direction. The top end of the square steel tube four 36 is used for mounting the hand chain block lifting lug one 37.

[0036] The rolling wheel support plate one 31 and the rolling wheel support plate two 33 are fixedly connected below the two ends of the square steel tube two 32. The rolling wheels 8 are mounted on the rolling wheel support plate one 31 and the rolling wheel support plate two 33 respectively. The wheel shaft of the rolling wheel 8 is connected with the corresponding rolling wheel support plate, so that the rolling wheel 8 rotates relative to the support plate. During assembly, the outer circular surface of the rolling wheel 8 is seated on the flange of the two H-shaped steel one 15 of the base 1, so that the mobile frame 3 can move in the longitudinal direction of the base 1. The dead weight of the mobile frame 3, the rotating support arm 5 and the load of the welding equipment are transmitted to the rolling wheel 8 through the square steel tube frame, and then transmitted to the flange of the long H-shaped steel one 15 by the rolling wheel 8, forming a clear load bearing and guiding path.

[0037] The rotating support arm fixing plate 38 is fixedly connected with the side surface of the square steel tube five 39, which is used for providing a hinged mounting surface for the rotating support arm 5. The hand chain block lifting lug one 37 is fixedly connected with the top end of the square steel tube four 36. The hand chain block lifting lug one 37 is located on the upper part of the portal frame and is in the upper region of the hinged point of the rotating support arm 5, which is convenient for the upper end of the hand chain block 4 to be hung.

[0038] The round steel one 34 is fixedly connected with the upper side of the square steel tube two 32. The round steel one 34 is arranged in the vertical direction and corresponds to the mounting position of the counterweight 7. The counterweight 7 is provided with a limiting hole. The round steel one 34 passes through the limiting hole of the counterweight 7, which is used for limiting the relative sliding of the counterweight 7 in the transverse and longitudinal directions. The counterweight 7 moves integrally with the mobile frame 3 and keeps the mounting position stable.

[0039] The roller 9 is arranged at the lower part of the moving frame 3, and specifically, the roller 9 is installed between the two square steel tubes 32, with the rotating axis arranged in the transverse direction. The roller 9 is rotationally connected with the lower part of the moving frame 3, so that the roller 9 can rotate relative to the moving frame 3. During the longitudinal movement of the moving frame 3 along the base 1, the roller 9 forms rolling contact with the upper surface of the base 1 or the contact position of the longitudinal main beam of the base, so as to provide auxiliary rolling support, reduce the moving resistance, and improve the smoothness of the axial adaptive movement.

[0040] The rotating arm 5 comprises square steel tubes 51, hoisting lugs 52, steel tubes 53, steel plates 54, round steel 55, and steel bars 56.

[0041] The two square steel tubes 51 are arranged in parallel and serve as the main arm of the rotating arm 5. The two square steel tubes 51 are fixedly connected through the round steel 55 and the steel bars 56 welded therebetween, so that the main arm forms an integral force structure and improves the torsional and bending stiffness.

[0042] The steel tube 53 is rotationally connected to one end of the main arm, with the axis arranged in the transverse direction. The steel tube 53 is hinged to the rotating arm fixing plate 38 on the moving frame 3 as a rotating shaft. After being hinged, the rotating arm 5 can swing in the vertical plane about the axis of the steel tube 53. The hinge point bears the main bending moment and shear force of the rotating arm 5 and the welding equipment, and transmits the load to the moving frame 3, and then to the base 1 through the rolling wheels 8.

[0043] The round steel 55 forms a mounting shaft for mounting the welding equipment support plate 6 at the free end region of the rotating arm 5. The axis of the round steel 55 is arranged in the transverse direction and is fixed relative to the two square steel tubes 51.

[0044] The upper end of the hoist 4 is connected to the hoisting lug 37 on the top of the moving frame 3, and the lower end of the hoist 4 is connected to the hoisting lug 52 on the rotating arm 5. By winding and unwinding the chain of the hoist 4, the effective distance between the lug 37 and the lug 52 is changed, so as to drive the rotating arm 5 to rotate about the hinge rotating shaft steel tube 53, realize continuous adjustment of the pitch angle, and maintain the force state of the hoist 4 after the target angle is adjusted, so as to maintain the angle position of the rotating arm 5.

[0045] The welding equipment support plate 6 comprises a support steel plate 61 and a round steel pipe two 62 fixedly connected to one side edge of the support steel plate 61, the round steel pipe two 62 is sleeved on the outer periphery of the round steel two 55 at the end of the rotating support arm 5 as a shaft sleeve, the shaft sleeve is rotationally connected with the round steel two 55, so that the welding equipment support plate 6 can rotate around the axis of the round steel two 55, thereby realizing the small angle fine adjustment of the welding equipment in the circumferential direction; the support steel plate 61 forms a supporting surface of the welding equipment, after the welding equipment is installed on the support steel plate 61, the weight and welding process load are transmitted to the round steel pipe two 62 and the steel bar 56 through the support steel plate 61, and then transmitted to the round steel two 55, and finally borne by the rotating support arm 5, the moving frame 3 and the base 1.

[0046] The rolling frame 11 is arranged on one side of the base 1 and located in the other side area of the pressure steel pipe 10, the pipe wall of the pressure steel pipe 10 is connected with the rollers on the rolling frame 11, the rollers on the rolling frame 11 are in rolling contact with the outer periphery of the pressure steel pipe 10, the rolling frame 11 is used for supporting and driving the pressure steel pipe 10 to rotate around its own axis, and the pipe end of the pressure steel pipe 10 is supported and matched by the pipe end roller 2 to form a multi-point support, so as to ensure the stability during rotation.

[0047] During construction, first, the base 1 is arranged along the pressure steel pipe 10 in the axial direction and leveled, the end where the pipe end roller 2 is located is aligned with the position below the pipe end of the pressure steel pipe 10, the pressure steel pipe 10 is placed on the rollers of the pipe end roller 2 and the rolling frame 11, so that the pressure steel pipe 10 is stably supported and has the freedom of rotation, then the moving frame 3 is erected on the flanges of the two H-shaped steel one 15 of the base 1 through the rolling wheel 8, so that the moving frame 3 can move in the longitudinal direction to the axial position of the girth weld, the rotating support arm 5 is hingedly installed through the steel pipe 53 and the rotating support arm fixing plate 38 of the moving frame 3, the upper end of the hand-operated hoist 4 is hung on the lifting lug one 37, and the lower end is hung on the lifting lug two 52, the welding equipment support plate 6 is sleeved on the round steel two 55 through the round steel pipe two 62 to form a rotating connection, and the welding equipment is installed on the support steel plate 61. Finally, the counterweight 7 is passed through the round steel one 34 and positioned on the moving frame 3, so that the counterweight 7 moves with the moving frame 3 and does not slide relatively.

[0048] During welding, first, the moving frame 3 is pushed to move in the longitudinal direction of the base 1, so as to realize the axial alignment of the welding equipment with the girth weld, then the hand-operated hoist 4 is operated to adjust the pitch angle of the rotating support arm 5, so that the end of the welding gun is aligned with the center line of the groove and reaches the required welding angle, then the welding equipment support plate 6 is rotated to finely adjust the welding equipment in the circumferential direction of the round steel two 55, finally the pressure steel pipe 10 is uniformly rotated around its own axis by the rolling frame 11, the welding equipment maintains the posture to complete the continuous welding of the girth weld, if the length of the pressure steel pipe 10 changes, the auxiliary rolling support provided by the roller 9 is used to make the moving frame 3 more smoothly adjusted in the longitudinal direction, so as to quickly complete the new axial alignment.

[0049] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structure or equivalent process conversion made by using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An auxiliary device for welding the circumferential seam of pressure steel pipes in a pumped storage power station, characterized in that, The system includes a base (1), pipe end rollers (2), a movable frame (3), a hand-operated hoist (4), a rotating support arm (5), a welding equipment support plate (6), a counterweight (7), rolling wheels (8), and a roller (9). The base (1) is arranged along the axial direction of the pressure steel pipe (10). The pipe end rollers (2) are located at one end of the base (1) to support the pipe end of the pressure steel pipe (10). The movable frame (3) is located above the base (1) and moves along the length of the base (1). Rolling wheels (8) are respectively provided on both sides of the bottom of the movable frame (3). Rolling wheel (8) is rolled on the longitudinal main beam of the base (1); the top of the mobile frame (3) is provided with a hand chain hoist hanging point, one end of the rotating arm (5) is hinged to the mobile frame (3), the upper end of the hand chain hoist (4) is connected to the hand chain hoist hanging point, and the lower end of the hand chain hoist (4) is connected to the hanging point on the rotating arm (5); the welding equipment support plate (6) is set at the free end of the rotating arm (5) and is used to support the welding equipment, the counterweight (7) is set on the mobile frame (3), and the roller (9) is set at the lower part of the mobile frame (3).

2. The auxiliary device according to claim 1, characterized in that, The base (1) includes a steel plate (11), H-beams for the legs (12), a square steel pipe (13), a round steel pipe (14), an H-beam (15), an H-beam (16), a roller support plate (17), and an H-beam (18). The steel plate (11) is placed on the ground and is vertically fixed to one end of the H-beams for the legs (12). The other end of the H-beams for the legs (12) is fixedly connected to the longitudinal main beam of the base (1). 1) The longitudinal main beam is composed of two parallel and spaced long H-beams (15). H-beams (18), round steel pipes (14) and square steel pipes (13) are arranged in sequence along the longitudinal direction between the H-beams (15). The side of the H-beams (16) is fixedly connected to the side of the H-beams (18). The roller support plate (17) is fixedly connected to the H-beams (16). The pipe roller (2) is set on the roller support plate (17).

3. The auxiliary device according to claim 1, characterized in that, The mobile frame (3) is a portal frame structure, including a first rolling wheel support plate (31), a second square steel pipe (32), a second rolling wheel support plate (33), a first round steel bar (34), a third square steel pipe (35), a fourth square steel pipe (36), a first hand-operated hoist lifting lug (37), a rotating support arm fixing plate (38), and a fifth square steel pipe (39). The two ends of the third square steel pipe (35) are respectively vertically fixedly connected to one end of the two fifth square steel pipes (39) to form a portal-shaped structure. The other end of the fifth square steel pipe (39) is vertically fixedly connected to one end of the second square steel pipe (32). The first rolling wheel support plate (31) and the second rolling wheel support plate (33) The first and second ends of the square steel pipe (32) are fixedly connected to the bottom of the two ends of the square steel pipe (32). The first and second rolling wheel support plates (31 and 33) are both equipped with rolling wheels (8). The first hand hoist lifting lug (37) is fixedly connected to the top of the square steel pipe (36). The bottom end of the square steel pipe (36) is vertically fixedly connected to the side of the steel pipe (35). The rotating support arm fixing plate (38) is fixedly connected to the side of the square steel pipe (39). The first round steel (34) is fixedly connected to the upper side of the square steel pipe (32) and corresponds to the installation position of the counterweight (7). The first round steel (34) passes through the limiting hole on the counterweight (7).

4. The auxiliary device according to claim 1, characterized in that, The rotating support arm (5) includes a square steel pipe (51), a hand-operated hoist lug (52), a steel pipe (53), a steel plate (54), a round steel bar (55), and a steel bar (56). The two square steel pipes (51) are arranged in parallel as the main arm and are connected and fixed by the round steel bar (55) and the steel bar (56) welded between them. The steel pipe (53) is rotatably connected to one end of the main arm. The steel pipe (53) serves as a pivot and is hinged to the rotating support arm fixing plate (38) on the mobile frame (3). The round steel bar (55) serves as an installation shaft for the welding equipment support plate (6) to be fitted. The steel plate (54) is welded across the two square steel pipes (51). The hand-operated hoist lug (52) is fixedly connected to the steel plate (54).

5. The auxiliary device according to claim 1, characterized in that, The welding equipment support plate (6) includes a support steel plate (61) and a round steel pipe (62). The round steel pipe (62) is fixedly connected to one side edge of the support steel plate (61) and sleeved on the outer periphery of the round steel pipe (55) at the end of the rotating support arm (5) to form a rotating connection.

6. The auxiliary device according to claim 1, characterized in that, It also includes a rolling frame (11), which is located on one side of the base (1). The wall of the pressure steel pipe (10) is connected to the rollers on the rolling frame (11), and the pressure steel pipe (10) rotates around its own axis through the rollers on the rolling frame (11).

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