A welding device and method for steep slope steel platform construction

Abstract

The present application relates to a kind of steep slope steel platform construction welding device and method, including two through connecting pin hinged positioning seat, multiple adjusting wheels installed on the positioning seat, positioning plate is slidably connected with two positioning seat respectively by two sliding columns, auxiliary positioning mechanism is installed on the positioning plate;With clamping plate can be clamped web, ensure its vertical, while also can carry upper flange plate and lower flange plate, not only can ensure its parallel, but also can be welded simultaneously;Positioning seat can be self-adapting adjustment according to the size of steel pipe pier, adjusting wheel can change the direction of device relative to steel pipe pier, can realize the uniform horizontal height of steel pipe pier different direction corbel welding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a welding device and method for steep slope steel platform construction. BACKGROUND

[0002] One of the difficulties in steep slope steel platform welding is corbel welding. In the welding operation of the corbel, the perpendicularity of the web plate and the parallelism of the upper flange plate and the lower flange plate directly affect the load-bearing performance of the corbel. In traditional welding, positioning is often performed by manual holding or simple fixtures, which not only makes it difficult to ensure that the web plate always remains vertical, but also makes the upper flange plate and the lower flange plate prone to tilting and mispositioning, resulting in insufficient relative position accuracy of the three, which further affects the welding quality and structural stress stability. At the same time, due to the limitations of the steep slope steel platform construction environment, the welding of the upper flange plate, the lower flange plate and the web plate usually needs to be performed in steps, which not only prolongs the construction period, but also may cause cumulative errors due to multiple positioning, further reducing the welding precision.

[0003] Secondly, the adaptability of the traditional device is poor for welding corbels in different directions on the steel pipe pier. The size of the steel pipe pier varies, and the corbels need to be welded in different directions at a uniform horizontal height to meet the connection requirements of the steel platform. The positioning structure of the existing welding device is usually fixed in size, and it is difficult to adaptively adjust according to the actual size of the steel pipe pier, resulting in insufficient fit between the device and the steel pipe pier, affecting the positioning stability. In addition, adjusting the direction of the device is tedious and difficult to accurately control the welding angle of the corbel, which may cause problems such as inconsistent heights of corbels in different directions and angle deviations, increasing the difficulty of subsequent steel platform installation. SUMMARY

[0004] In order to solve the above-mentioned problems existing in the prior art, the present application aims to provide a welding device and method for steep slope steel platform construction.

[0005] The technical solution adopted by the present application is as follows:

[0006] A welding device for steep slope steel platform construction, comprising two positioning seats hinged by connecting pins, a plurality of adjusting wheels mounted on the positioning seats, a positioning plate slidably connected to the two positioning seats through two sliding columns, and an auxiliary positioning mechanism mounted on the positioning plate.

[0007] The auxiliary positioning mechanism comprises mounting seats and bearing plates mounted on the cylinder barrels and piston rods of lifting cylinders, a guide rod penetrating through and fixedly connected to the bearing plates, two control plates slidably arranged at both ends of the guide rod, connecting rods hinged to the mounting seats and the control plates at both ends, and two groups of clamping plates slidably mounted in the two control plates.

[0008] The control plate is used for positioning the upper flange plate and the lower flange plate, the clamping plate is used for bearing the upper flange plate and the lower flange plate, the side of each group of clamping plates close to each other forms a limiting groove, and a plurality of limiting grooves are matched for positioning and bearing the web plate; the upper flange plate, the lower flange plate and the web plate are welded on the side of the steel pipe pier by the aid of the welding device for steep slope steel platform construction, and the bracket welding is completed.

[0009] As a preferred embodiment of the present application, the two positioning seats are respectively fixed with winches and lug ears at the ends away from each other, the winches are driven by driving motors mounted on the side walls of the positioning seats, steel ropes are wound on the winches, the ends of the steel ropes are provided with hooks, after the steel ropes are wound around the side wall of the steel pipe pier, the hooks are matched with the lug ears to fix the welding device for steep slope steel platform construction to the steel pipe pier.

[0010] As a preferred embodiment of the present application, the side of the positioning seat close to the steel pipe pier is provided with a mounting groove, an adjusting box is mounted in the mounting groove, the adjusting box is hollow inside, a moving frame penetrating through the inner wall of one side of the adjusting box is arranged in the adjusting box, one end of the moving frame located in the inside of the adjusting box is rotationally connected with a plurality of adjusting wheels, and the other end of the moving frame located outside the adjusting box is connected with the outer side wall of the adjusting box through a control cylinder.

[0011] As a preferred embodiment of the present application, the sliding column is slidably connected with the positioning seat, the side of the positioning seat away from the steel pipe pier is provided with a positioning knob, the sliding of the sliding column relative to the positioning seat is locked by the positioning knob, one end of the sliding column is fixedly provided with a moving rod, one side of the moving rod is fixedly provided with a sliding block, and the sliding block is slidably connected with the positioning plate.

[0012] As a preferred embodiment of the present application, the side of the positioning plate away from the steel pipe pier is rotationally provided with a gear, the two sides of the gear are respectively engaged with a rack, the two racks are respectively fixedly connected with two moving rods, one end of the positioning plate away from the positioning seat is fixedly provided with a mounting plate, and the mounting plate is fixedly connected with the mounting seat.

[0013] As a preferred embodiment of the present application, the ends of the two control plates away from each other are respectively fixedly provided with a fixed frame, the end of the fixed frame is fixedly provided with a connecting shaft, the end of the connecting rod close to the fixed frame is rotationally connected with the connecting shaft, a driving assembly fixedly connected with the fixed frame is arranged between the fixed frame and the control plate, the two ends of the driving assembly are respectively used to individually control a threaded rod, the two threaded rods are respectively threadedly matched with two clamping plates in the same group, the two ends of the control plate are respectively fixedly provided with a fixed block, and the threaded rod and the fixed block are rotationally connected.

[0014] As the preferred application, one side of the clamping plate is formed with a positioning groove, the positioning grooves of the clamping plates of different groups are matched with each other, and the control plate is respectively fixed with a fixed baffle at both ends, and the clamping plates of the same group are located between the two fixed baffles.

[0015] A welding method for steep slope steel platform construction, comprising the following steps:

[0016] S1, electric welding machine and welding rod selection; select a manual direct current arc welding machine, adopt direct current reverse connection, and select a low hydrogen alkaline electrode;

[0017] S2, groove processing; the upper flange plate and the lower flange plate are respectively opened single-side V-shaped grooves, the groove angle is 35°, and the web plate is opened K-shaped groove, the groove angle is 35°;

[0018] S3, web plate welding; the web plate is installed between the two groups of clamping plates by using the welding device for steep slope steel platform construction, the posture of the adjusting wheel is adjusted, the K-shaped groove edge of the web plate is attached to the steel pipe pier and welded;

[0019] S4, upper and lower flange plate welding; after the web plate is connected to the steel pipe pier stably, the two groups of clamping plates are separated by using the welding device for steep slope steel platform construction, the adjusting wheel is adjusted to reset, the upper flange plate and the lower flange plate are respectively installed between the two groups of clamping plates, and the posture of the adjusting wheel is adjusted again, so that the V-shaped groove edges of the upper flange plate and the lower flange plate are attached to the steel pipe pier and welded;

[0020] S5, corrosion prevention treatment; after the welding area is inspected and qualified, the primer is brushed.

[0021] As the preferred application, in steps S3 and S4, when the web plate is welded, 50mm is reserved for non-welding, and after the upper flange plate and the lower flange plate are welded, the non-welding area is supplemented.

[0022] As the preferred application, in step S4, welding is performed from both sides to the middle, three layers of welding are performed, the welding directions of adjacent layers are opposite, the welding joints of each layer are staggered by 20mm, the upper flange plate and the lower flange plate are welded at the same time, and the welding current, welding speed and welding layer number during welding are consistent.

[0023] The beneficial effects of this invention are as follows: As a welding device and method for construction of steel platforms on steep slopes, this invention can clamp the web plate during the welding of corbels, ensuring its verticality. It can also support the upper and lower flange plates, ensuring parallelism and allowing for simultaneous welding. The positioning seat can be adaptively adjusted according to the size of the steel pipe pier, and the adjusting wheel can change the direction of the device relative to the steel pipe pier. This enables welding of corbels at the same horizontal height in different directions on the steel pipe pier. Furthermore, the adjusting wheel can change the state of the positioning seat by retracting or protruding, allowing welding to be performed in the locked position and adjustment in the free position, effectively improving welding accuracy and reducing welding difficulty. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0025] Figure 1 This is a structural schematic diagram of the present invention when positioning the upper and lower flange plates (only part of the steel pipe pier is shown).

[0026] Figure 2 This is the present invention. Figure 1 A front view structural diagram;

[0027] Figure 3 This is the present invention. Figure 1 A top-down structural diagram (the steel pipe pier is partially hidden);

[0028] Figure 4 This is the present invention. Figure 1 Explosion structure diagram (steel pipe pier hidden);

[0029] Figure 5 This is the present invention. Figure 4 A magnified structural diagram at point A;

[0030] Figure 6 This is the present invention. Figure 1 A schematic diagram of the back structure of the positioning seat;

[0031] Figure 7 This is the present invention. Figure 6 A schematic diagram of the adjusting wheel structure inside the mounting slot;

[0032] Figure 8 This is a schematic diagram of the structure when the web plate of the present invention is positioned;

[0033] Figure 9 This is the present invention. Figure 1 and Figure 8 A structural diagram comparing the two working states. Detailed Implementation

[0034] In order to further illustrate the technical means adopted by the present application and the effects achieved by the present application in realizing the predetermined object of the present application, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0035] In combination Figures 1-9 The welding device for steep slope steel platform construction comprises two positioning seats 18 hingedly connected through connecting pins 17, a plurality of adjusting wheels 47 installed on the positioning seats 18, a positioning plate 22 slidably connected with the two positioning seats 18 through two sliding columns 20, and an auxiliary positioning mechanism 21 installed on the positioning plate 22. The two positioning seats 18 can be self-adaptively adjusted according to the size of the steel pipe pier 11. The adjusting wheels can change the direction of the device relative to the steel pipe pier 11, and can realize the welding of corbel in different directions at a unified horizontal height of the steel pipe pier. After the device is preliminarily fixed with the steel pipe pier, the actual working height of the device is accurately adjusted by using the sliding columns 20.

[0036] The auxiliary positioning mechanism 21 comprises mounting seats 16 and bearing plates 35 installed on the cylinder barrel and the piston rod of lifting cylinders 15 respectively, guide rods 34 penetrating through and fixedly connected with the bearing plates 35, two control plates 29 slidably arranged at the two ends of the guide rods 34 respectively, connecting rods 36 hingedly connected with the mounting seats 16 and the control plates 29 at the two ends respectively, and two groups of clamping plates 31 slidably installed in the two control plates 29 respectively. The clamping plates 31 can clamp the web plate 14 to ensure its verticality, and can also bear the upper flange plate 12 and the lower flange plate 13, which can not only ensure the parallelism of the upper flange plate 12 and the lower flange plate 13, but also can simultaneously bear them, thereby facilitating simultaneous welding.

[0037] The control plates 29 are used for positioning the upper flange plate 12 and the lower flange plate 13, and the clamping plates 31 are used for bearing the upper flange plate 12 and the lower flange plate 13. Each group of clamping plates 31 forms a limiting groove 33 on the side close to each other, and a plurality of limiting grooves 33 are matched for positioning and bearing the web plate 14. By using the auxiliary function of the welding device for steep slope steel platform construction, the upper flange plate 12, the lower flange plate 13 and the web plate 14 are welded on the side surface of the steel pipe pier 11, and the corbel welding is completed.

[0038] Beneficially, one end of the two positioning seats 18 away from each other is respectively fixed with a winch 25 and a hanging ear 24, the winch 25 is driven by a driving motor 26 installed on the side wall of the positioning seat 18, the winch 25 is wound with a steel rope, the end of the steel rope is provided with a hanging buckle, after the steel rope is wound around the side wall of the steel pipe pier 11, the hanging buckle cooperates with the hanging ear 24 to fix the welding device for steep slope steel platform construction and the steel pipe pier 11. The driving motor 26 keeps the winch 25 in the state of winding the steel rope, so as to ensure that the device can keep a stable state relative to the steel pipe pier 11 during the auxiliary welding process, and in the process of rotating the device, the driving motor 26 can be controlled to reduce the contraction degree of the winch 25, reduce the friction, and allow the steel rope and the surface of the steel pipe pier 11 to wear to a certain extent.

[0039] Beneficially, the side of the positioning seat 18 close to the steel pipe pier 11 is provided with a mounting groove 42, the adjusting box 46 is installed in the mounting groove 42, the adjusting box 46 is hollow inside, the moving frame 48 penetrating through the inner wall of one side of the adjusting box 46 is arranged in the adjusting box 46, one end of the moving frame 48 located inside the adjusting box 46 is rotationally connected with a plurality of adjusting wheels 47, and the other end of the moving frame 48 located outside the adjusting box 46 is connected with the outer side wall of the adjusting box 46 through the control cylinder 49. In addition to enabling the device to rotate along the side of the steel pipe pier 11, the adjusting wheel 47 can also change the state of the positioning seat 18 by contraction or protrusion, and the contraction and protrusion of the adjusting wheel 47 correspond to the locking state and the free state of the positioning seat respectively, welding is performed in the locking state, and adjustment is performed in the free state.

[0040] Beneficially, the sliding column 20 is slidably connected with the positioning seat 18, the side of the positioning seat 18 away from the steel pipe pier 11 is provided with a positioning knob 19, the sliding of the sliding column 20 relative to the positioning seat 18 is locked by using the positioning knob 19, one end of the sliding column 20 is fixedly provided with a moving rod 23, one side of the moving rod 23 is fixedly provided with a sliding block 39, and the sliding block 39 is slidably connected with the positioning plate 22. The positioning knob 19 is connected with a threaded column, and the section of the sliding column 20 located in the positioning seat 18 has concave-convex clamping points. The threaded column is locked with the sliding column 20 or the restriction on the sliding column 20 is released by rotating the positioning knob 19.

[0041] Beneficially, the side of the positioning plate 22 away from the steel pipe pier 11 is rotationally provided with a gear 38, the two sides of the gear 38 are respectively meshed with a rack 27, the two racks 27 are respectively fixedly connected with the two moving rods 23, one end of the positioning plate 22 away from the positioning seat 18 is fixedly provided with a mounting plate 37, and the mounting plate 37 is fixedly connected with the mounting seat 16. Rotation of the gear 38 drives the two racks 27 on the two sides to move by an equal distance, so as to ensure that the included angle between the positioning plate 22 and the two positioning seats 18 is always consistent.

[0042] Beneficially, one end of the two control plates 29 is respectively fixedly provided with a fixed frame 44, the end of the fixed frame 44 is fixedly provided with a connecting shaft 43, one end of the connecting rod 36 close to the fixed frame 44 is rotationally connected with the connecting shaft 43, a driving assembly 45 fixedly connected with the fixed frame 44 is arranged between the fixed frame 44 and the control plate 29, two ends of the driving assembly 45 respectively control a threaded rod 41, the two threaded rods 41 are respectively threadedly matched with two clamping plates 31 in the same group, and a fixed block 40 is fixedly arranged at two ends of the control plate 29. The driving assembly 45 is integrated by a plurality of servo motors, different servo motors are respectively controlled by a control system, and the two clamping plates 31 on the same side can be moved towards each other or in the same direction.

[0043] Beneficially, the clamping plate 31 is formed with a positioning groove 30 on one side, the positioning grooves 30 of the clamping plates 31 in different groups are matched with each other, a fixed baffle 28 is fixedly arranged at two ends of the control plate 29, and the clamping plates 31 in the same group are located between the two fixed baffles 28. When the web plate 14 is clamped, the positioning grooves 30 on the two sides are staggered, the buckling is allowed, collision is avoided, and clamping of the web plate 14 is improved.

[0044] A welding method for steep slope steel platform construction, comprising the following steps:

[0045] S1, selecting an electric welding machine and a welding rod; a manual direct current arc welding machine is selected, a direct current reverse connection is adopted, and a low-hydrogen alkaline welding rod is selected;

[0046] S2, groove processing; a single-side V-shaped groove is formed on the upper flange plate 12 and the lower flange plate 13 respectively, the groove angle is 35°, and a K-shaped groove is formed on the web plate 14, the groove angle is 35°;

[0047] S3, web plate welding; the web plate 14 is installed between two groups of clamping plates 31 by using the welding device for steep slope steel platform construction, the posture of the adjusting wheel 47 is adjusted, the K-shaped groove edge of the web plate 14 is abutted against the steel pipe pier 11, and welding is performed;

[0048] S4, upper and lower flange plate welding; after the web plate 14 is connected with the steel pipe pier 11 stably, the welding device for steep slope steel platform construction is used, the two groups of clamping plates 31 are adjusted to be separated, the adjusting wheel 47 is adjusted to be reset, the upper flange plate 12 and the lower flange plate 13 are installed between the two groups of clamping plates 31 respectively, and the posture of the adjusting wheel 47 is adjusted again, so that the V-shaped groove edges of the upper flange plate 12 and the lower flange plate 13 abut against the steel pipe pier 11 and welding is performed;

[0049] S5, anticorrosion treatment; after the welding area is checked and qualified, the primer is painted.

[0050] Beneficially, in steps S3 and S4, when welding the web plate 14, 50mm is not welded at the top and bottom, and after the upper flange plate 12 and the lower flange plate 13 are welded, the unwelded area is supplemented.

[0051] Beneficially, in step S4, welding from both sides to the middle, three layers of welding, the adjacent layer welding direction is opposite, each layer of welding joint is staggered by 20mm, the upper flange plate 12 and the lower flange plate 13 are welded at the same time, the welding current, the welding speed and the welding layer number are consistent during welding.

[0052] The working principle of the steep slope steel platform construction welding device of the present application is as follows:

[0053] In the initial state, the steel pipe pier 11 is constructed, the position of the corbel to be welded is marked according to the design requirements and drawings, and the adjusting wheel 47 protrudes out of the installation groove 42.

[0054] The steep slope steel platform construction welding device is transported to the position below the marked position, the steel rope on the winch 25 is wound around the steel pipe pier 11 for one turn and hung on the hanging ear 24, the hanging ear 24 is connected by the hook, under the action of the connecting pin 17, the two positioning seats 18 will automatically adapt to the appropriate angle according to the size of the steel pipe pier 11, the adjusting wheel 47 is in contact with the side surface of the steel pipe pier 11, at this time the positioning seat 18 and the steel pipe pier 11 can maintain the same horizontal height, and the overall posture of the device is adjusted by the adjusting wheel 47 to make the positioning plate 22 parallel to the position to be welded of the corbel. During this process, the relative rotation of the two positioning seats 18 drives the movement of the moving rod 23 and the sliding block 39 relative to the positioning plate 22, and the action of the gear 38 and the rack 27 ensures that the moving distance of the two moving rods 23 is equal.

[0055] At the same time, the two positioning knobs 19 are adjusted to make the sliding column 20 free, the positioning plate 22 is accurately adjusted to the target height according to the actual welding position, and then the sliding column 20 is fixed again by the positioning knob 19.

[0056] Reference is made to the accompanying drawings Figure 8 , the lifting cylinder 15 is started, the piston rod thereof is controlled to retract, the control plates 29 on both sides are made to slide along the guide rods 34 to realize separation under the action of the connecting rods 36, the two control plates 29 are separated from each other, the driving assembly 45 is started, the threaded rods 41 on the output shafts at both ends thereof are controlled to rotate, the threaded rods 41 are made to move under the action of the threads, the distance between the clamping plates 31 on the same side is adjusted to be adapted to the size of the web plate 14, and then the lifting cylinder 15 is started again to control the connecting rods 36 on both sides to close, and the web plate 14 is fixed by the four clamping plates 31. At this time, the position to be welded of the web plate 14 and the steel pipe pier 11 have a certain distance. Figure 9 ​

[0057] Adjusting wheel 47 rotates along the side of steel pipe pier 11, and the actual working position of the device can be quickly found. After the position is found, control cylinder 49 and driving motor 26 are started at the same time. Control cylinder 49 controls the contraction of its piston rod, drives adjusting wheel 47 to retract into adjusting box 46 and no longer contacts steel pipe pier 11, so that adjusting box 46 and positioning seat 18 contact steel pipe pier 11. At the same time, driving motor 26 controls winch 25 to wind up the steel rope, so that positioning and steel pipe pier 11 are kept stable. Thus, the device has a stable working position relative to steel pipe pier 11. Adjusting wheel 47 retracts at the same time, and positioning plate 22 further approaches steel pipe pier 11. The position to be welded of web plate 14 is just corresponding to the target position of steel pipe pier 11 and close to it. Web plate 14 is welded according to the web plate welding process.

[0058] After the state of web plate 14 is stable, lifting cylinder 15 is started to separate control plate 29, control adjusting wheel 47 to reset, and driving assembly 45 is started to control clamping plate 31 to adjust the position. Upper flange plate 12 and lower flange plate 13 are respectively lifted to the upper surface of upper clamping plate 31 and the upper surface of lower clamping plate 31. At this time, the distance between upper flange plate 12 and lower flange plate 13 is greater than the height of web plate 14.

[0059] The positions of upper flange plate 12 and lower flange plate 13 are adjusted so that upper flange plate 12 and lower flange plate 13 correspond to web plate 14. Then, lifting cylinder 15 is started to make control plate 29 close to the end of control plate 29 to contact upper flange plate 12 and lower flange plate 13. Driving assembly 45 is started again to control clamping plate 31 to move, so that the distance between upper flange plate 12 and lower flange plate 13 is reduced. Finally, adjusting wheel 47 is retracted into adjusting box 46, so that upper flange plate 12 and lower flange plate 13 respectively contact web plate 14. Upper flange plate 12 and lower flange plate 13 are welded according to the upper and lower flange plate welding process.

[0060] After the target bracket is welded, control plate 29 is controlled to separate to the two sides until it no longer contacts the target bracket. The height of positioning plate 22 and the position of positioning seat 18 relative to steel pipe pier 11 can be adjusted, so that the next bracket can be welded in other directions of steel pipe pier 11.

[0061] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as the above preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments, which does not depart from the technical solution of the present application, are still within the scope of the present application.

Claims

1. A welding device for steep slope steel platform construction, characterized by: It includes two positioning seats hinged by connecting pins, multiple adjusting wheels installed on the positioning seats, a positioning plate slidably connected with the two positioning seats by two sliding columns, and an auxiliary positioning mechanism installed on the positioning plate; The auxiliary positioning mechanism includes mounting seats and bearing plates installed on the cylinder barrels and piston rods of lifting cylinders respectively, a guide rod penetrating through and fixedly connected with the bearing plates, two control plates slidably arranged at the two ends of the guide rod respectively, a connecting rod hingedly connected with the mounting seat and the control plate at the two ends respectively, and two groups of clamping plates slidably installed in the two control plates respectively. The control plates are used for positioning upper and lower flange plates, and the clamping plates are used for bearing the upper and lower flange plates. Each group of clamping plates forms a limiting groove on the side close to each other, and multiple limiting grooves are matched for positioning and bearing webs. With the auxiliary function of the welding device for steep slope steel platform construction, the upper flange plate, the lower flange plate and the web are welded on the side of the steel pipe pier to complete the corbel welding. The side close to the steel pipe pier of the positioning seat is provided with a mounting groove, and an adjusting box is installed in the mounting groove. The adjusting box is hollow inside, and a moving frame penetrating through the inner wall of one side of the adjusting box is arranged in the adjusting box. One end of the moving frame located in the inside of the adjusting box is rotationally connected with multiple adjusting wheels, and the other end of the moving frame located outside the adjusting box is connected with the outer side wall of the adjusting box through a control cylinder. The sliding column is slidably connected with the positioning seat, and the side away from the steel pipe pier of the positioning seat is provided with a positioning knob. The positioning knob is used for locking the sliding of the sliding column relative to the positioning seat. One end of the sliding column is fixedly provided with a moving rod, and one side of the moving rod is fixedly provided with a sliding block. The sliding block is slidably connected with the positioning plate.

2. The welding device for steep slope steel platform construction according to claim 1, characterized in that: Two ends of the positioning seats away from each other are respectively fixedly provided with winches and hanging ears. The winches are driven by driving motors installed on the side walls of the positioning seats. Steel ropes are wound on the winches, and the ends of the steel ropes are provided with hooks. After the steel ropes are wound around the side wall of the steel pipe pier, the hooks and the hanging ears are matched to fix the welding device for steep slope steel platform construction with the steel pipe pier.

3. The welding device for steep slope steel platform construction according to claim 1, characterized in that: The side away from the steel pipe pier of the positioning plate is rotationally provided with a gear. The two sides of the gear are respectively engaged with a rack. The two racks are respectively fixedly connected with two moving rods. The end of the positioning plate away from the positioning seat is fixedly provided with a mounting plate. The mounting plate is fixedly connected with the mounting seat.

4. The welding device for steep slope steel platform construction according to claim 1, characterized in that: Two ends of the control plates away from each other are respectively fixedly provided with a fixed frame. The end of the fixed frame is fixedly provided with a connecting shaft. One end of the connecting rod close to the fixed frame is rotationally connected with the connecting shaft. A driving assembly fixedly connected with the fixed frame is arranged between the fixed frame and the control plate. Two ends of the driving assembly are respectively used for controlling a threaded rod. The two threaded rods are respectively threadedly matched with two clamping plates in the same group. Two ends of the control plate are respectively fixedly provided with a fixed block. The threaded rod and the fixed block are rotationally connected.

5. The welding device for steep slope steel platform construction according to claim 4, characterized in that: The clamping plates are provided with alignment grooves on one side, and the alignment grooves of the clamping plates of different groups are matched with each other.

6. A welding method for steep slope steel platform construction using the welding apparatus for steep slope steel platform construction according to any one of claims 1 to 5, characterized by The method comprises the following steps: S1, selecting the electric welding machine and the welding rod; a manual direct current arc welding machine is selected, a direct current reverse connection is adopted, and a low hydrogen alkaline welding rod is selected; S2, groove processing; the upper flange plate and the lower flange plate are respectively provided with a single-side V-shaped groove, and the groove angle is 35°; the web plate is provided with a K-shaped groove, and the groove angle is 35°; S3, web plate welding; the web plate is installed between two groups of clamping plates by using the welding device for steep slope steel platform construction, the posture of the adjusting wheel is adjusted, the K-shaped groove edge of the web plate is abutted against the steel pipe pier and welded; S4, upper and lower flange plate welding; after the web plate is connected to the steel pipe pier stably, the two groups of clamping plates are separated by using the welding device for steep slope steel platform construction, the adjusting wheel is reset, the upper flange plate and the lower flange plate are respectively installed between the two groups of clamping plates, the posture of the adjusting wheel is adjusted again, the V-shaped groove edges of the upper flange plate and the lower flange plate are abutted against the steel pipe pier and welded; S5, corrosion prevention treatment; after the welding area is checked and qualified, a primer is brushed.

7. The welding method for steep slope steel platform construction according to claim 6, characterized in that: In steps S3 and S4, when the web plate is welded, 50mm is reserved on the upper and lower sides and is not welded, after the upper flange plate and the lower flange plate are welded, the non-welded area is supplemented.

8. The welding method for steep slope steel platform construction according to claim 7, characterized in that: In step S4, the two sides are welded to the middle, three layers of welding are adopted, the welding directions of adjacent layers are opposite, the welding joints of each layer are staggered by 20mm, the upper flange plate and the lower flange plate are welded simultaneously, and the welding current, the welding speed and the welding layers are consistent during welding.

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