Positioning welding equipment and process for supporting columns of suspended steel platforms

Abstract

The present application relates to a positioning welding device and process for a column supporting a suspended steel platform, wherein the main technical solution is a positioning welding device, which includes a circular track, a traveling mechanism, a welding gun, a power source and an auxiliary bracket, wherein the power source is used to be arranged on the steel platform, the auxiliary bracket is used to be installed in the inner cavity of the column, the circular track is used to be installed on the inner circumference of the column, the traveling mechanism moves around the column circumferentially along the circular track, the welding gun is arranged on the traveling mechanism, the welding gun is provided with a wire for connecting to the power source, the auxiliary bracket is used to suspend the wire, and the auxiliary bracket is provided with a wire feeding mechanism for feeding welding wire to the welding gun. The present application realizes automatic welding in the narrow inner cavity of the column by arranging a traveling mechanism and a welding gun.

Description

Technical Field

[0001] The present application relates to the field of steel platform column construction, and in particular to a positioning welding device and process for a column used to support a suspended steel platform. Background Art

[0002] As a steel structure building, the steel platform has the advantages of fast construction, reduced environmental pollution, and high supporting strength. It is suitable for light rail transfer platforms, stair platforms and other load-bearing platforms.

[0003] The steel platform often requires supporting structures such as columns to support it in the air, and the existing columns and the steel platform are fixed by manual welding.

[0004] With respect to the above-mentioned related technologies, the inventors believe that when the columns are arranged in a narrow space, it is difficult for operators to be located near the connection point between the columns and the steel platform. If welding is performed from the inner edge of the columns, since the inner cavity of the columns is also relatively narrow, it is difficult for operators to enter for welding. In other words, it is difficult to complete the welding and fixation between the columns and the steel platform in a narrow space. Summary of the invention

[0005] In order to facilitate the welding and fixing between the column and the steel platform in a narrow space, the present application provides a positioning welding device and process for the column used for supporting a suspended steel platform.

[0006] The present application provides a positioning welding device for a column for supporting a suspended steel platform, which adopts the following technical solution:

[0007] A positioning welding device for a column supporting a suspended steel platform, comprising a circular track, a traveling mechanism, a welding gun, a power supply and an auxiliary bracket, wherein the power supply is used to be set on the steel platform, the auxiliary bracket is used to be installed in the inner cavity of the column, the circular track is used to be installed on the inner circumferential surface of the column, the traveling mechanism moves circumferentially around the column along the circular track, the welding gun is arranged on the traveling mechanism, the welding gun is provided with an electric wire for connecting to the power supply, the auxiliary bracket is used to suspend the electric wire, and the auxiliary bracket is provided with a wire feeding mechanism for feeding welding wire to the welding gun.

[0008] By adopting the above technical solution, when in use, the circular track, the traveling mechanism, the welding gun, and the auxiliary bracket are pre-installed in the inner cavity of the column, and it is ensured that the wires of the welding gun are located on the auxiliary bracket, and the power supply is pre-set on the steel platform; then the column is hoisted or lifted so that the column is erected directly below the steel platform, and it is ensured that the upper end of the column abuts against the lower surface of the steel platform; then the wires are pulled to the power supply, and then the traveling mechanism and the welding gun are started, so that the welding gun moves along the weld route between the column and the steel platform and welds until one circle is welded, thereby realizing automatic welding in the narrow inner cavity of the column.

[0009] Optionally, the annular track includes an annular rack and an annular support plate, the rack is arranged on the inner wall of the column along the inner circumference of the column, the tooth grooves of the rack are arranged inwardly, and the support plate is used to support the walking mechanism; the walking mechanism includes a driving motor and a vertical plate, wherein the driving motor is installed on the vertical plate, the welding gun is connected to the vertical plate through a clamp, and the vertical output shaft of the driving motor is fixed with a first gear, and the first gear is meshed with the rack; the support plate is fixed with a vertical side plate, and the side plate abuts against the side of the vertical plate away from the rack.

[0010] By adopting the above technical solution, the walking mechanism is realized by the meshing of the first gear and the rack, and the walking stability is ensured by setting a support plate. Secondly, through the detachable cooperation between the walking mechanism and the circular track, when the welding is completed, the wire can be pulled upward to detach the walking mechanism from the circular track, and the walking mechanism can be taken out through the gap between the steel structures on the steel platform, thereby realizing the recovery of the walking mechanism.

[0011] Optionally, the side panels are made of rubber.

[0012] By adopting the above technical solution, the side plates have a certain elasticity, thereby facilitating the walking mechanism to leave the circular track.

[0013] Optionally, a first auxiliary ball is provided at the center of the lower wheel surface of the first gear, and a second auxiliary ball is provided at the lower end of the vertical plate; and a first track groove for adapting the first auxiliary ball and a second track groove for adapting the second auxiliary ball are provided on the upper surface of the supporting plate.

[0014] By adopting the above technical solution and arranging the coordination between the auxiliary balls and the rail grooves, the moving linearity of the walking mechanism is improved.

[0015] Optionally, the housing of the driving motor is fixed with a horizontally arranged first connecting plate, and the vertical plate is fixed with a horizontally arranged second connecting plate, and the first connecting plate, the clamp and the second connecting plate are connected by vertically arranged bolts; a linkage structure is provided on the vertical plate, and the linkage structure is used to transmit the reverse torque of the driving motor to the bolts; the first connecting plate is provided with a first traction rope, and the second connecting plate is provided with a second traction rope.

[0016] By adopting the above technical solution, after welding is completed, the drive motor rotates in the opposite direction, and the linkage structure transmits the reverse torque of the drive motor to the bolt to simultaneously unlock the first connecting plate, the clamp and the second connecting plate, and then pulls the first traction rope and the second traction rope upward in turn to respectively remove the vertical plate and the drive motor from the inner cavity of the column for recovery.

[0017] That is, the walking mechanism is broken down into smaller parts to reduce the possibility that the walking mechanism is too large to be taken out from the gaps in the complex steel structure.

[0018] Optionally, the linkage structure includes a second gear, the vertical plate is provided with a vertically arranged rotating shaft, the second gear is sleeved on the rotating shaft, and a one-way bearing is provided between the second gear and the rotating shaft, the second gear is meshed with the first gear, an eccentric rod is provided on the upper wheel surface of the second gear, and a vertically arranged sliding groove is provided on the outer peripheral surface of the lower end of the bolt, and the upper end of the eccentric rod is connected to the sliding groove along a vertical sliding manner.

[0019] By adopting the above technical solution, when the output shaft of the driving motor rotates forward, the torque of the first gear is transmitted to the second gear and the first gear, and the second gear is idling. When the output shaft of the driving motor rotates reversely, the second gear transmits the torque of the driving motor to the rotating shaft, and the bolt is loosened through the cooperation of the eccentric rod and the slide groove, thereby unlocking the first connecting plate, the clamp and the second connecting plate.

[0020] Optionally, a supporting cylinder is provided at the horizontal center of the auxiliary bracket, a rotating rod is rotatably connected inside the supporting cylinder, the rotating rod is provided with the wire feeding mechanism and the vertical rod, the vertical rod is provided with a supporting half-cylinder, and the wire passes through the supporting half-cylinder.

[0021] By adopting the above technical solution, the wire feeding mechanism and the electric wire can be rotated, so they can move according to the different positions of the traveling mechanism.

[0022] Optionally, the rotating rod includes a first half rod and a second half rod which are arranged in halves, the wire feeding mechanism is arranged on the first half rod, and the second half rod is connected to the vertical rod.

[0023] By adopting the above technical solution, the first half rod is pulled out upwards to remove the wire feeding mechanism from the gap in the steel structure of the steel platform, that is, the wire feeding mechanism is first recovered, and then the second half rod is pulled out upwards for recovery. In this way, the whole is broken down into parts and the difficulty of recovery is greatly reduced.

[0024] Optionally, the second half rod is made of rubber, the vertical rod is a telescopic rod, and the ends of the first traction rope and the second traction rope are both fixed to the upper end of the telescopic rod.

[0025] By adopting the above technical solution, when the first half rod is taken out from the supporting tube, the second half rod has a higher degree of freedom, and then the vertical pole is stretched so that the upper end of the vertical pole extends out of the gap in the steel structure and enters above the steel platform. During this period, the first connecting plate and the second connecting plate are detached from the circular track, and then the vertical pole is rotated, so that the vertical pole rotates eccentrically around the center line of the supporting tube (the looseness of the second half rod makes the vertical pole have an eccentric degree of freedom), and the torque of the eccentric rotation is large, thereby forcing the first traction rope and the second traction rope to be quickly wound around the vertical pole, and also making the walking mechanism wound around the vertical pole, and then the vertical pole is lifted up, so that the vertical pole and the walking mechanism can be easily taken out from the inner cavity of the column, which is convenient and quick.

[0026] The present application also provides a positioning welding process for a column for supporting a suspended steel platform, which adopts the following technical solution:

[0027] A positioning welding process for a column used for supporting a suspended steel platform comprises the following steps:

[0028] S1. Pre-install the circular track, walking mechanism, welding gun and auxiliary bracket in the inner cavity of the column, and ensure that the wires of the welding gun are located on the auxiliary bracket, and the power supply is pre-set on the steel platform;

[0029] S2. Hoist or lift the column so that it stands upright directly below the steel platform and ensure that the upper end of the column abuts against the lower surface of the steel platform;

[0030] S3, pulling the wire through the gap of the steel structure on the steel platform to connect the wire to the power supply on the steel platform, and then starting the welding gun and the driving motor. At this time, the output shaft of the driving motor rotates forward, and the vertical plate is driven to move along the length direction of the rack through the meshing of the first gear and the rack, so that the welding gun moves along the welding line between the column and the steel platform and welds until one circle is welded;

[0031] S4. After welding is completed, the drive motor rotates in the opposite direction, and the linkage structure transmits the reverse torque of the drive motor to the bolt to simultaneously unlock the first connecting plate, the clamp and the second connecting plate, and then pulls the wire upward to remove the clamp and the welding gun from the walking mechanism, and takes them to the steel platform through the steel structure gap on the steel platform, and then pulls the first traction rope and the second traction rope upward in turn to respectively remove the vertical plate and the drive motor from the inner cavity of the column for reuse.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. Automatic welding in the narrow inner cavity of the column can be realized by setting the walking mechanism and welding gun;

[0034] 2. Through the detachable cooperation between the walking mechanism and the circular track, when the welding is completed, the wire can be pulled upward to detach the walking mechanism from the circular track, and the walking mechanism can be taken out through the gap of the steel structure on the steel platform, so as to realize the recovery of the walking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the positioning welding equipment of this embodiment after installation.

[0036] Figure 2 It is a cross-sectional view of a column used to reflect the specific structure of the positioning welding equipment of this embodiment.

[0037] Figure 3 2 is a cross-sectional view of a column of this embodiment.

[0038] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0039] Description of reference numerals: 1, circular track; 2, walking mechanism; 3, welding gun; 4, power supply; 5, auxiliary bracket; 10, column; 11, supporting plate; 111, first rail groove; 112, second rail groove; 12, rack; 13, side plate; 20, steel platform; 201, steel structure gap; 21, driving motor; 211, first connecting plate; 212, battery; 213, first traction rope; 214, second traction rope; 22, Vertical plate; 221, second connecting plate; 222, second auxiliary ball; 223, rotating shaft; 23, first gear; 231, first auxiliary ball; 241, bolt; 242, second gear; 243, one-way bearing; 244, eccentric rod; 245, slide groove; 31, clamp; 41, electric wire; 51, supporting cylinder; 521, first half rod; 522, second half rod; 53, wire feeding mechanism; 54, vertical rod; 55, supporting half cylinder. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-4 This application is described in further detail.

[0041] The embodiment of the present application discloses a positioning welding device for a column used for supporting a suspended steel platform.

[0042] Reference Figure 1 and Figure 2 The positioning welding equipment for the supporting column of the suspended steel platform includes a circular track 1, a walking mechanism 2, a welding gun 3, a power supply 4 and an auxiliary bracket 5, wherein the power supply 4 is placed on the steel platform 20, and the power supply 4 is used to power the welding gun 3.

[0043] like Figure 2 , Figure 3As shown, the annular track 1 includes an annular rack 12 and an annular supporting plate 11. The rack 12 is adhered to the inner wall of the column 10 along the inner circumference of the column 10. If the column 10 is circular, the circumference of the rack 12 is circular, and the tooth groove of the rack 12 faces the center line of the column 10; the supporting plate 11 is horizontally arranged, and the supporting plate 11 is fixed on the inner circumference of the column 10. The supporting plate 11 is provided with a rubber side plate 13 along its own circumference, and a space for accommodating the walking mechanism 2 is formed between the side plate 13 and the rack 12.

[0044] like Figure 4 As shown, the walking mechanism 2 includes a driving motor 21 and a vertical plate 22, wherein the driving motor 21 is vertically arranged, and a first connecting plate 211 arranged horizontally is fixed to the housing of the driving motor 21, and the first connecting plate 211 is provided with a battery 212 for powering the driving motor 21, and a second connecting plate 221 arranged horizontally is fixed to the vertical plate 22, and the second connecting plate 221 and the first connecting plate 211 are stacked up and down, and the first connecting plate 211 and the second connecting plate 221 are connected by vertically arranged bolts 241, and at the same time, a clamp 31 is provided on the second connecting plate 221, and the clamp 31 is used to clamp the welding gun 3 so that the welding gun 3 is tilted upward, and the clamp 31 and the second connecting plate 221 are also connected by bolts 241; at the same time, the welding gun 3 is provided with an electric wire 41, and the electric wire 41 can pass through the steel structure gap 201 of the steel platform 20 and be connected to the power source 4, so that the power supply 4 to the welding gun 3 is realized.

[0045] like Figure 4 As shown, the output shaft of the driving motor 21 is fixed with a first gear 23, and the first gear 23 is meshed with the rack 12, so as to realize the movement of the walking mechanism 2 along the length direction of the rack 12; at the same time, a first auxiliary ball 231 is provided at the center of the lower wheel surface of the first gear 23, and a second auxiliary ball 222 is provided at the lower end of the vertical plate 22; the upper surface of the supporting plate 11 is provided with a first rail groove 111 and a second rail groove 112, and through the cooperation of the first auxiliary ball 231 and the first rail groove 111, and the cooperation of the second auxiliary ball 222 and the second rail groove 112, the movement of the walking mechanism 2 is more stable.

[0046] The vertical plate 22 is provided with a vertically arranged rotating shaft 223, on which a second gear 242 is sleeved, a one-way bearing 243 is provided between the second gear 242 and the rotating shaft 223, and the second gear 242 is meshed with the first gear 23; the upper wheel surface of the second gear 242 is provided with two vertically arranged eccentric rods 244, the outer peripheral surface of the lower end of the bolt 241 is provided with a vertically arranged sliding groove 245, and the upper end of the eccentric rod 244 is connected to the sliding groove 245 along the vertical sliding.

[0047] like Figure 3As shown, the auxiliary bracket 5 is fixed in the inner cavity of the column 10, and a wire feeding mechanism 53 for feeding welding wire to the welding gun 3 is provided on the auxiliary bracket 5. The wire feeding mechanism 53 can be a structure composed of a motor and a roller frame to realize automatic feeding of welding wire to the welding gun 3. Specifically, a vertically arranged supporting cylinder 51 is provided at the horizontal center of the auxiliary bracket 5. The lower end of the supporting cylinder 51 is closed and the upper end is open. The supporting cylinder 51 is directly below the steel structure gap 201 of the steel platform 20. A rotating rod is rotatably connected in the supporting cylinder 51, and the rotating rod includes There are two halves of a first half rod 521 and a second half rod 522, wherein a wire feeding mechanism 53 is arranged on the first half rod 521, and the second half rod 522 is made of rubber. A vertical rod 54 is arranged on the upper end of the second half rod 522, and the vertical rod 54 is a telescopic rod. The telescopic rod is magnetic, and a supporting half cylinder 55 is arranged on the upper end of the telescopic rod. The wire 41 passes through the supporting half cylinder 55, that is, the supporting half cylinder 55 can place the wire 41 in a position close to the gap 201 of the steel structure, so that the operator can directly pull the wire 41 to complete the connection of the power supply 4.

[0048] In addition, the first connecting plate 211 is provided with a first traction rope 213 , and the second connecting plate 221 is provided with a second traction rope 214 . The other ends of the first traction rope 213 and the second traction rope 214 are both fixed to the upper end of the telescopic rod.

[0049] The present application also discloses a column positioning welding process using the above-mentioned positioning welding equipment, including the following steps:

[0050] S1. Pre-install the circular track 1, the traveling mechanism 2, the welding gun 3, and the auxiliary bracket 5 in the inner cavity of the column 10, and ensure that the wires 41 of the welding gun 3 are located in the supporting half cylinder 55; the steel platform 20 is supported by a temporary bracket, and then the power supply 4 is pre-set on the steel platform 20.

[0051] S2. A lifting cylinder is provided on the steel platform 20 to lift the column 10 upwards so that the column 10 stands upright directly below the steel platform 20 and ensures that the upper end of the column 10 abuts against the lower surface of the steel platform 20. At this time, the supporting half cylinder 55 extends into the gap 201 of the steel structure.

[0052] S3. The operator's hand passes through the steel structure gap 201 on the steel platform 20 to pull the wire 41 upwards, so that the wire 41 is connected to the power supply 4 on the steel platform 20, and then starts the welding gun 3 and the drive motor 21. The output shaft of the drive motor 21 rotates forward, and through the engagement of the first gear 23 and the rack 12, the vertical plate 22 is driven to move along the length direction of the rack 12, so that the welding gun 3 moves along the weld route between the column 10 and the steel platform 20 and welds until one circle is welded.

[0053] S4. After welding is completed, the drive motor 21 rotates in the reverse direction. When the output shaft of the drive motor 21 rotates in the reverse direction, the second gear 242 transmits the torque of the drive motor 21 to the rotating shaft 223, and the eccentric rod 244 and the slide groove 245 cooperate to loosen the bolt 241, thereby unlocking the first connecting plate 211, the clamp 31 and the second connecting plate 221, and then the wire 41 is pulled upward to remove the clamp 31 and the welding gun 3 from the walking mechanism 2, and the clamp 31 and the welding gun 3 are taken to the steel platform 20 through the steel structure gap 201 on the steel platform 20, so as to realize the recovery of the clamp 31 and the welding gun 3.

[0054] Then, using auxiliary tools such as hooks, the wire feeding mechanism 53 and the first half rod 521 are fished out from the inner cavity of the column 10. At this time, only the second half rod 522 is located in the supporting tube 51, and the second half rod 522 has a higher degree of freedom. Then, the vertical rod 54 is stretched so that the upper end of the vertical rod 54 extends out of the steel structure gap 201 and enters above the steel platform 20. During this period, the upward movement of the vertical rod 54 drives the first connecting plate 211 and the second connecting plate 221 to disengage from the circular track 1, and then the vertical rod 54 is rotated so that the vertical rod 54 rotates eccentrically around the center line of the supporting tube 51 (the looseness of the second half rod 522 makes the vertical rod 54 have an eccentric degree of freedom), and the torque of the eccentric rotation is large, thereby forcing the first traction rope 213 and the second traction rope 214 to quickly wrap around the vertical rod 54, and also makes the walking mechanism 2 wrap around the vertical rod 54. Then, the vertical rod 54 is lifted up, and the vertical rod 54 and the walking mechanism 2 can be easily taken out from the inner cavity of the column 10 for reuse.

[0055] The implementation principle of the embodiment of the present application is: first, automatic welding is achieved in the narrow inner cavity of the column 10 through automatic welding, which is convenient and quick; then, various detachable connections are set to break the whole into parts, and the convergence effect of the vertical rod 54 is cooperated to reduce the volume of the walking mechanism 2, and it can be recycled together to effectively reduce the cost.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A positioning welding device for a column supporting a suspended steel platform, characterized in that: The invention comprises an annular track (1), a traveling mechanism (2), a welding gun (3), a power source (4) and an auxiliary bracket (5), wherein the power source (4) is arranged on a steel platform (20), the auxiliary bracket (5) is arranged in an inner cavity of a column (10), the annular track (1) is arranged on an inner peripheral surface of the column (10), the traveling mechanism (2) moves circumferentially around the column (10) along the annular track (1), the welding gun (3) is arranged on the traveling mechanism (2), the welding gun (3) is provided with an electric wire (41) for connecting to the power source (4), the auxiliary bracket (5) is used to suspend the electric wire (41), and the auxiliary bracket (5) is provided with a wire feeding mechanism (41) for feeding welding wire to the welding gun (3). 53); the annular track (1) comprises an annular rack (12) and an annular support plate (11); the rack (12) is arranged on the inner wall of the column (10) along the inner circumference of the column (10); the tooth groove of the rack (12) is arranged inwardly; the support plate (11) is used to support the walking mechanism (2); the walking mechanism (2) comprises a driving motor (21) and a vertical plate (22); the driving motor (21) is installed on the vertical plate (22); the welding gun (3) is connected to the vertical plate (22) through a clamp (31); the vertical output shaft of the driving motor (21) is fixed with a first gear (23), and the first gear (23) is meshed with the rack (12); the support plate (11) is fixed with a vertical side plate ( 13), the side plate (13) abuts against the side of the vertical plate (22) away from the rack (12); the side plate (13) is made of rubber; the housing of the drive motor (21) is fixed with a horizontally arranged first connecting plate (211), the vertical plate (22) is fixed with a horizontally arranged second connecting plate (221), the first connecting plate (211), the clamp (31) and the second connecting plate (221) are connected by vertically arranged bolts (241); a linkage structure is provided on the vertical plate (22), and the linkage structure is used to transmit the reverse torque of the drive motor (21) to the bolt (241); the first connecting plate (211) is provided with a first traction rope (213), The second connecting plate (221) is provided with a second traction rope (214); the linkage structure includes a second gear (242); the vertical plate (22) is provided with a vertically arranged rotating shaft (223); the second gear (242) is sleeved on the rotating shaft (223); a one-way bearing (243) is provided between the second gear (242) and the rotating shaft (223); the second gear (242) is meshed with the first gear (23); an eccentric rod (244) is provided on the upper wheel surface of the second gear (242); a vertically arranged sliding groove (245) is provided on the outer peripheral surface of the lower end of the bolt (241); and the upper end of the eccentric rod (244) is connected to the sliding groove (245) along a vertical sliding direction.

2. The positioning welding equipment for the supporting column of the suspended steel platform according to claim 1 is characterized in that: A first auxiliary ball (231) is provided at the center of the lower wheel surface of the first gear (23), and a second auxiliary ball (222) is provided at the lower end of the vertical plate (22); and a first track groove (111) for fitting the first auxiliary ball (231) and a second track groove (112) for fitting the second auxiliary ball (222) are provided on the upper surface of the supporting plate (11).

3. The positioning welding equipment for supporting columns of a suspended steel platform according to claim 1 is characterized in that: A supporting cylinder (51) is provided at the horizontal center of the auxiliary bracket (5), a rotating rod is rotatably connected inside the supporting cylinder (51), the rotating rod is provided with the wire feeding mechanism (53) and the vertical rod (54), the vertical rod (54) is provided with a supporting half cylinder (55), and the electric wire (41) passes through the supporting half cylinder (55).

4. The positioning welding equipment for the supporting column of the suspended steel platform according to claim 3 is characterized in that: The rotating rod comprises a first half rod (521) and a second half rod (522) which are arranged in halves. The wire feeding mechanism (53) is arranged on the first half rod (521), and the second half rod (522) is connected to the vertical rod (54).

5. The positioning welding equipment for supporting columns of a suspended steel platform according to claim 4 is characterized in that: The second half rod (522) is made of rubber, the vertical rod (54) is a telescopic rod, and the ends of the first traction rope (213) and the second traction rope (214) are both fixed to the upper end of the telescopic rod.

6. A positioning welding process for a supporting column (10) for a suspended steel platform (20), using the positioning welding equipment for a supporting column for a suspended steel platform as claimed in any one of claims 1, 3, 4, and 5, characterized in that: The following steps are involved: S1. Pre-install the circular track (1), the walking mechanism (2), the welding gun (3), and the auxiliary bracket (5) in the inner cavity of the column (10), and ensure that the wire (41) of the welding gun (3) is located on the auxiliary bracket (5), and the power source (4) is pre-set on the steel platform (20); S2, hoisting or lifting the column (10) so that the column (10) is erected directly below the steel platform (20), and ensuring that the upper end of the column (10) abuts against the lower surface of the steel platform (20); S3, pulling the wire (41) through the steel structure gap (201) on the steel platform (20) so that the wire (41) is connected to the power supply (4) on the steel platform (20), and then starting the welding gun (3) and the driving motor (21). At this time, the output shaft of the driving motor (21) rotates in the positive direction, and through the meshing of the first gear (23) and the rack (12), the vertical plate (22) is driven to move along the length direction of the rack (12), so that the welding gun (3) moves along the welding line between the column (10) and the steel platform (20) and welds until one circle is welded; S4. After welding is completed, the drive motor (21) rotates in the reverse direction, and the linkage structure transmits the reverse torque of the drive motor (21) to the bolt (241) to simultaneously unlock the first connecting plate (211), the clamp (31) and the second connecting plate (221), and then pulls the wire (41) upward to remove the clamp (31) and the welding gun (3) from the walking mechanism (2), and takes them to the steel platform (20) through the steel structure gap (201) on the steel platform (20), and then pulls the first traction rope (213) and the second traction rope (214) upward in turn to remove the vertical plate (22) and the drive motor (21) from the inner cavity of the column (10) respectively, so as to facilitate reuse.

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