Auxiliary support device for steel structure welding

Abstract

The utility model discloses an auxiliary strutting device for steel structure welding relates to steel structure welding support technical field, including support platform, support foot and I -beam strip. The utility model discloses the cooperation of setting up support platform, support foot, I -beam strip, fixing device, controller, sliding support rod, inner wall support clamping component, rolling part, control mechanism and rubber antiskid pad, has solved the existing support device when fixing work piece and needs to move the fixture etc. component through manual rotation adjusting bolt, not only needs to adjust the clamping interval manually according to the specification width of I -beam strip, and the operation flow is complicated and inefficient, and the single direction extrusion fixed mode is difficult to ensure that two I -beam strips are centered to realize axis alignment, and it is easy to lead to the butt deviation and influence welding quality, in addition, the greater friction that I -beam strip places directly on the support platform produces, makes when moving alignment welding joint personnel pull hard, further increased the operation difficulty.

Description

Technical Field

[0001] This utility model relates to the field of steel structure welding support technology, specifically an auxiliary support device for steel structure welding. Background Technology

[0002] Steel structures, as a core structural form in modern construction and machinery manufacturing, are widely used in various large-scale projects and equipment manufacturing due to their high strength, high stability, and modular assembly characteristics. In the construction and processing of steel structures, welding is a key process for connecting components. Among them, I-beams, as key components in steel structures, are often assembled by butt welding to form load-bearing frames, supporting trusses, and other core structures. The welding quality directly affects the stability and safety of the overall steel structure. During the butt welding of two I-beams, it is necessary to ensure that their axes are aligned to ensure that the end faces fit tightly, so as to ensure that the weld is evenly stressed and avoid a decrease in structural strength due to misalignment or excessive gaps. During the welding operation, support devices are needed to support, fix, and position the I-beams.

[0003] However, existing support devices require manual rotation of adjusting bolts to move fixtures and other components when fixing workpieces. This not only necessitates manually adjusting the clamping spacing according to the width and specifications of the I-beams, making the operation cumbersome and inefficient, but also makes it difficult to ensure that the two I-beams are centered to achieve axial alignment due to the unidirectional compression fixing method. This can easily lead to butt joint deviations that affect welding quality. Furthermore, the large friction generated by placing the I-beams directly on the support platform makes it difficult for personnel to pull when moving and aligning the welded joints, further increasing the operational difficulty. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide an auxiliary support device for steel structure welding. This device features the advantages of quickly adjusting the clamping distance for clamping, ensuring the I-beams are centered and aligned, and reducing movement resistance. It improves upon or solves the problems of existing support devices that require manual rotation of adjusting bolts to move clamps and other components when fixing workpieces. This not only necessitates manually adjusting the clamping distance according to the width of the I-beams, resulting in a cumbersome and inefficient operation, but also makes it difficult to ensure the two I-beams are centered and aligned using a unidirectional pressing method, easily leading to butt joint deviations that affect welding quality. Furthermore, the significant friction generated by placing the I-beams directly on the support platform makes it difficult for personnel to pull them when moving and aligning the weld joint, further increasing the operational difficulty.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary support device for steel structure welding, comprising a support platform, legs, and I-beams. The number of legs is six, and they are evenly and fixedly connected to the left and right sides of the lower surface of the support platform. Cavities are respectively opened at the front and rear ends of the support platform. Fixing devices are provided inside the front and rear ends of the support platform. The number of I-beams is two, and they are respectively placed at the front and rear ends above the support platform and correspond to the two fixing devices. A controller is fixedly connected to the middle of the front surface of the support platform. The fixing device includes a sliding support rod, an inner wall clamping assembly, and a control mechanism. There are two sliding support rods, which are respectively arranged on the front and rear sides inside the support platform, and the left and right ends are respectively fixedly connected to the left and right side surfaces inside the support platform. There are two inner wall clamping assemblies, which are respectively arranged on the left and right sides at the upper end inside the support platform. The control mechanism is arranged at the lower end inside the support platform.

[0006] In a preferred embodiment of this invention, the inner wall support assembly includes a movable seat, a clamping plate, a pressure rod, a placement groove, and rolling elements. The movable seat is sleeved on the right end surface of the two sliding support rods and is slidably connected to the sliding support rods. The upper ends of the front and rear sides of the movable seat respectively extend out of the support platform and are slidably connected to the support platform. The clamping plate is fixedly connected to the upper end of the movable seat, the pressure rod is fixedly connected to the lower surface of the movable seat, the placement groove is opened on the upper surface of the lower right end of the clamping plate, and the number of rolling elements is several and they are evenly arranged inside the placement groove.

[0007] In a preferred embodiment of this utility model, the rolling element includes a rotating shaft and a roller. The rotating shaft is disposed inside the placement groove, and its left and right ends are rotatably connected to the left and right sides of the placement groove, respectively. The roller is sleeved on the surface of the rotating shaft and rotatably connected to the rotating shaft, and its upper side extends out of the placement groove. The upper side of the roller contacts the lower side of the I-beam.

[0008] As a preferred embodiment of this invention, rubber anti-slip pads are fixedly connected to the surfaces of the two clamping plates that are far apart from each other.

[0009] In a preferred embodiment of this invention, the control mechanism includes a linkage component and a driving component. The linkage component is disposed at the lower ends of the two pressure rods, and the driving component is disposed at the front side of the lower end of the linkage component.

[0010] In a preferred embodiment of this invention, the linkage assembly includes a rotating rod, a drive disc, an arc-shaped extrusion groove, and a worm gear. The rotating rod is disposed inside the support platform, and both its upper and lower ends are rotatably connected to the support platform. The drive disc is sleeved on the surface of the rotating rod and fixedly connected to it. There are two arc-shaped extrusion grooves, which are respectively opened on the left and right sides of the drive disc and correspond to the positions of the two pressure rods. The lower ends of the two pressure rods are respectively disposed inside the two arc-shaped extrusion grooves and are movably connected to them. The worm gear is sleeved on the lower surface of the rotating rod and fixedly connected to it.

[0011] In a preferred embodiment of this invention, the driving component includes a worm gear, a motor, a protective shell, and heat dissipation holes. The worm gear is disposed on the front side of the worm wheel and meshes with the worm wheel. Both ends of the worm gear are rotatably connected to the support platform, with the right end extending out of the support platform. The motor is fixedly connected to the right end of the worm gear and is fixedly connected to the front surface of the support platform. The protective shell is fitted onto the surface of the motor and is fixedly connected to the front surface of the support platform. The number of heat dissipation holes is several, and they are evenly fixedly connected to the upper and lower surfaces of the protective shell.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the coordinated use of a support platform, legs, I-beams, fixing devices, controller, sliding support rod, inner wall clamping assembly, moving seat, clamping plate, pressure rod, placement groove, rolling element, rotating shaft, roller, control mechanism, linkage assembly, rotating rod, drive disc, arc-shaped extrusion groove, worm gear, drive element, worm, motor, protective shell, heat dissipation holes, and rubber anti-slip pad, improves or solves to a certain extent the problems of existing support devices that require manual rotation of adjusting bolts to move clamps and other components when fixing workpieces. This not only requires manual adjustment of the clamping distance according to the specifications and width of the I-beams, but also makes the operation process cumbersome and inefficient. Furthermore, the unidirectional extrusion fixing method makes it difficult to ensure that the two I-beams are centered to achieve axis alignment, which can easily lead to butt joint deviations and affect welding quality. In addition, the large friction generated by placing the I-beams directly on the support platform makes it difficult for personnel to pull when moving and aligning the welding joint, further increasing the difficulty of operation.

[0013] 2. This utility model sets up an inner wall support and clamping assembly, in which the movable seat slides stably along the sliding support rod to realize the synchronous opening and closing of the clamping plate. Combined with the rubber anti-slip pad to enhance the friction of the support and clamping, the rolling element converts the friction between the I-beam and the support structure into rolling friction, which has both fixed stability and convenient position adjustment.

[0014] 3. By setting up a control mechanism, this utility model can realize the automated synchronous drive of the inner wall support clamping assembly, accurately control the opening and closing range of the clamping plate, and at the same time, the protective shell and heat dissipation holes can ensure the stable operation of the drive components, improving the durability and ease of operation of the device. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the auxiliary support device of this utility model; Figure 2 A schematic diagram of the exploded three-dimensional structure of the auxiliary support device; Figure 3 This is an exploded three-dimensional structural diagram of the inner wall support assembly; Figure 4 This is a three-dimensional schematic diagram of the explosion-proof control mechanism.

[0016] In the diagram: 1. Support platform; 2. Support leg; 3. I-beam; 4. Fixing device; 5. Controller; 6. Sliding support rod; 7. Inner wall support clamp assembly; 71. Moving seat; 72. Clamping plate; 73. Pressure rod; 74. Placement groove; 75. Rolling element; 752. Rotating shaft; 752. Roller; 8. Control mechanism; 81. Linkage assembly; 811. Rotating rod; 812. Drive disc; 813. Arc-shaped extrusion groove; 814. Worm gear; 82. Drive element; 821. Worm; 822. Motor; 823. Protective shell; 824. Heat dissipation hole; 9. Rubber anti-slip pad. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0020] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0021] Example 1 Reference Figure 1-4 This is the first embodiment of the present utility model, which provides an auxiliary support device for welding steel structures, including a support platform 1, legs 2 and I-beams 3. There are six legs 2, which are evenly fixedly connected to the left and right sides of the lower surface of the support platform 1. The front and rear ends of the support platform 1 are respectively provided with cavities. Fixing devices 4 are provided inside the front and rear ends of the support platform 1. There are two I-beams 3, which are respectively placed at the front and rear ends above the support platform 1 and correspond to the two fixing devices 4. A controller 5 is fixedly connected to the middle of the front surface of the support platform 1. The fixing device 4 includes a sliding support rod 6, an inner wall support clamp assembly 7, and a control mechanism 8. There are two sliding support rods 6, which are respectively arranged on the front and rear sides inside the support platform 1, and the left and right ends are respectively fixedly connected to the left and right side surfaces inside the support platform 1. There are two inner wall support clamp assemblies 7, which are respectively arranged on the left and right sides at the upper end inside the support platform 1. The control mechanism 8 is arranged at the lower end inside the support platform 1.

[0022] Specifically, the auxiliary support device achieves automatic centering and fixing of I-beams 3 of different specifications through the synchronous opening and closing of the inner wall support clamp assembly 7, and reduces the position adjustment resistance in combination with the rolling element 75, effectively improving the accuracy and operation efficiency of welding and butt joint.

[0023] Furthermore, the controller 5 drives the control mechanism 8 to operate, causing the inner wall support clamp assembly 7 to move synchronously along the sliding support rod 6. It achieves fixation by tightening the inner wall of the lower end of the I-beam 3 outward. When adjusting the docking position, the rolling element 75 converts sliding friction into rolling friction to reduce resistance, thereby completing an efficient and precise welding support operation.

[0024] Example 2 In the second embodiment of this utility model, the inner wall support clamping assembly 7 includes a movable seat 71, a clamping plate 72, a pressure rod 73, a placement groove 74, and rolling elements 75. The movable seat 71 is sleeved on the right end surface of the two sliding support rods 6 and is slidably connected to the sliding support rods 6. Support platforms 1 extend from the upper ends of the front and rear sides of the movable seat 71 and are slidably connected to the support platforms 1. The clamping plate 72 is fixedly connected to the upper end of the movable seat 71, the pressure rod 73 is fixedly connected to the lower surface of the movable seat 71, the placement groove 74 is opened on the upper surface of the lower right end of the clamping plate 72, and the number of rolling elements 75 is several and they are evenly arranged inside the placement groove 74. The rolling element 75 includes a rotating shaft 751 and a roller 752. The rotating shaft 751 is disposed inside the placement groove 74, and its left and right ends are rotatably connected to the left and right sides of the placement groove 74 respectively. The roller 752 is sleeved on the surface of the rotating shaft 751 and rotatably connected to the rotating shaft 751, and its upper side extends out of the placement groove 74. The upper side of the roller 752 contacts the lower side of the I-beam 3. Rubber anti-slip pads 9 are fixedly connected to the surfaces of the two clamping plates 72 that are far apart from each other.

[0025] Specifically, by setting the inner wall support clamping assembly 7, the movable seat 71 slides stably along the sliding support rod 6 to realize the synchronous opening and closing of the clamping plate 72. Combined with the rubber anti-slip pad 9, the support clamping friction is enhanced. At the same time, the rolling element 75 converts the friction between the I-beam steel bar 3 and the support structure into rolling friction, which has both fixed stability and convenient position adjustment.

[0026] Furthermore, when the drive disc 812 rotates, the arc-shaped extrusion grooves 813 on its left and right sides will exert an extrusion and pushing effect on the two pressure rods 73. Since the pressure rods 73 are fixedly connected to the movable seat 71, and the movable seat 71 is sleeved on the sliding support rod 6 and slidably connected to it, under the action of the thrust, the two movable seats 71 will move away from the left and right sides synchronously along the sliding support rod 6. The clamping plate 72 at the upper end of the movable seat 71 moves outward accordingly, causing the two rubber anti-slip pads 9 fixed on the opposite side to gradually contact the inner wall of the lower end of the I-beam 3 and generate a supporting force. Through this inner wall support clamping method, the I-beam 3 is stably fixed, and the synchronous movement on both sides can ensure that the I-beam 3 is in the center position.

[0027] Example 3 In the third embodiment of this utility model, the control mechanism 8 includes a linkage component 81 and a driving component 82. The linkage component 81 is disposed at the lower end of the two pressure rods 73, and the driving component 82 is disposed at the front side of the lower end of the linkage component 81. The linkage assembly 81 includes a rotating rod 811, a drive disk 812, an arc-shaped extrusion groove 813, and a worm gear 814. The rotating rod 811 is located inside the support platform 1, and both its upper and lower ends are rotatably connected to the support platform 1. The drive disk 812 is sleeved on the surface of the rotating rod 811 and is fixedly connected to the rotating rod 811. There are two arc-shaped extrusion grooves 813, which are respectively opened on the left and right sides of the drive disk 812 and correspond to the positions of the two pressure rods 73. The lower ends of the two pressure rods 73 are respectively located inside the two arc-shaped extrusion grooves 813 and are movably connected to the arc-shaped extrusion grooves 813. The worm gear 814 is sleeved on the lower surface of the rotating rod 811 and is fixedly connected to the rotating rod 811. The driving component 82 includes a worm gear 821, a motor 822, a protective shell 823, and heat dissipation holes 824. The worm gear 821 is located on the front side of the worm wheel 814 and is meshed with the worm wheel 814. Both the left and right ends of the worm gear 821 are rotatably connected to the support platform 1, and the right end extends out of the support platform 1. The motor 822 is fixedly connected to the right end of the worm gear 821 and is fixedly connected to the front surface of the support platform 1. The protective shell 823 is fitted on the surface of the motor 822 and is fixedly connected to the front surface of the support platform 1. There are several heat dissipation holes 824, which are evenly fixedly connected to the upper and lower surfaces of the protective shell 823.

[0028] Specifically, by setting up the control mechanism 8, the inner wall support clamping assembly 7 can be automatically and synchronously driven, and the opening and closing range of the clamping plate 72 can be precisely controlled. At the same time, the protective shell 823 and the heat dissipation holes 824 can ensure the stable operation of the drive component 82, and improve the durability and ease of operation of the device.

[0029] Furthermore, during fixing, the lower ends of the two I-beams 3 are placed on the outside of the clamping plates 72 at the front and rear ends of the support platform 1, so that the side of the two clamping plates 72 that are close to each other is located inside the lower end of the I-beams 3, and the lower side of the I-beams 3 is in contact with the upper side of the roller 752 in the placement groove 74. At this time, the motor 822 is started by the controller 5, and the motor 822 drives the worm 821 to rotate. Since the worm 821 meshes with the worm wheel 814, it drives the rotating rod 811 to rotate synchronously. The drive disk 812 sleeved on the surface of the rotating rod 811 rotates together. When the drive disk 812 rotates, the arc-shaped extrusion grooves 813 on its left and right sides will exert an extrusion and pushing effect on the two pressure rods 73.

[0030] Working principle: During fixing, the lower ends of the two I-beams 3 are placed on the outside of the clamping plates 72 at the front and rear ends of the support platform 1, respectively, so that the side of the two clamping plates 72 that is close to each other is located inside the lower end of the I-beams 3, and the lower side of the I-beams 3 is in contact with the upper side of the roller 752 in the placement groove 74. At this time, the motor 822 is started by the controller 5. The motor 822 drives the worm 821 to rotate. Since the worm 821 meshes with the worm wheel 814, it drives the rotating rod 811 to rotate synchronously. The drive disk 812 sleeved on the surface of the rotating rod 811 rotates together. When the drive disk 812 rotates, the arc-shaped extrusion grooves 81 on its left and right sides... 3 will exert a squeezing and pushing effect on the two pressure rods 73. Since the pressure rods 73 are fixedly connected to the movable seat 71, and the movable seat 71 is sleeved on the sliding support rod 6 and slidably connected to it, under the action of the thrust, the two movable seats 71 will move away from the left and right sides simultaneously along the sliding support rod 6. The clamping plate 72 at the upper end of the movable seat 71 will move outward accordingly, causing the two rubber anti-slip pads 9 fixed on the opposite side to gradually contact the inner wall of the lower end of the I-beam 3 and generate a supporting force. The I-beam 3 is stably fixed by this inner wall support and clamping method, and the simultaneous movement on both sides can ensure that the I-beam 3 is in the center position. When the fixation is released, the controller 5 starts the motor 822 in reverse. The motor 822 drives the worm 821 to rotate in reverse. Due to the meshing relationship between the worm 821 and the worm wheel 814, the rotating rod 811 rotates in reverse, and the drive disk 812 sleeved on the surface of the rotating rod 811 rotates in reverse synchronously. At this time, the arc-shaped extrusion grooves 813 on the left and right sides of the drive disk 812 generate an inward extrusion force on the two internal pressure rods 73. After the pressure rods 73 are subjected to force, they drive the movable seat 71 fixedly connected to it to move inward synchronously along the sliding support rod 6. The clamping plate 72 at the upper end of the movable seat 71 retracts inward, and the rubber anti-slip pad 9, which was originally in close contact with the inner wall of the lower end of the I-beam 3, gradually loses contact, the tension is gradually released, and thus the fixation is released. When the two I-beams 3 are joined together, the tension is slowly released so that the side of the clamping plate 72 that is close to each other no longer contacts the inner walls of the lower left and right sides of the clamping I-beams 3. The fixation is released, but the lower side of the I-beams 3 is still in contact with the upper side of the roller 752 in the placement groove 74. Since the roller 752 can rotate freely around the pivot 751, the sliding friction between the I-beams 3 and the support platform 1 is converted into rolling friction, which greatly reduces the moving resistance. Therefore, when the tension is released, the operator can easily push the I-beams 3 to join together. After joining, the clamping plate 72 can be tightened again.

[0031] In summary, by using a combination of components including a support platform 1, legs 2, I-beams 3, a fixing device 4, a controller 5, a sliding support rod 6, an inner wall clamping assembly 7, a moving seat 71, a clamping plate 72, a pressure rod 73, a placement groove 74, rolling elements 75, a rotating shaft 751, a roller 752, a control mechanism 8, a linkage assembly 81, a rotating rod 811, a drive disc 812, an arc-shaped extrusion groove 813, a worm gear 814, a drive element 82, a worm 821, a motor 822, a protective shell 823, heat dissipation holes 824, and rubber anti-slip pads 9, the existing support device's fixing mechanism has been improved or resolved to a certain extent. When handling workpieces, it is necessary to manually rotate the adjusting bolts to move the clamps and other components. This not only requires manually adjusting the clamping distance according to the specifications and width of the I-beams, but also makes the operation cumbersome and inefficient. Furthermore, the unidirectional pressing and fixing method makes it difficult to ensure that the two I-beams are centered and aligned, which can easily lead to butt joint deviations and affect welding quality. In addition, the large friction generated by placing the I-beams directly on the support platform makes it difficult for personnel to pull when moving and aligning the welded joints, further increasing the difficulty of operation. This solution achieves the effect of quickly adjusting the clamping distance for clamping, ensuring that the I-beams are centered and aligned, and reducing movement resistance.

[0032] The motor 822 controller 5, worm gear 814 and worm 821 used in this application can be additionally equipped with protective measures of common knowledge in the field under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.

[0033] It should be noted that the motor 822 controller 5, worm gear 814 and worm 821 are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0034] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0035] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0036] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An auxiliary support device for welding steel structures, comprising a support platform (1), legs (2), and I-beams (3), characterized in that: The number of the support legs (2) is six, and they are evenly fixedly connected to the left and right sides of the lower surface of the support platform (1). The front and rear ends of the support platform (1) are respectively provided with cavities. Fixing devices (4) are provided inside the front and rear ends of the support platform (1). The number of the I-beams (3) is two, and they are respectively placed at the front and rear ends above the support platform (1) and correspond to the two fixing devices (4). A controller (5) is fixedly connected to the middle of the front surface of the support platform (1). The fixing device (4) includes a sliding support rod (6), an inner wall support clamp assembly (7), and a control mechanism (8). There are two sliding support rods (6), which are respectively located on the front and rear sides inside the support platform (1), and the left and right ends are respectively fixedly connected to the left and right sides of the inside of the support platform (1). There are two inner wall support clamp assemblies (7), which are respectively located on the left and right sides of the upper part inside the support platform (1). The control mechanism (8) is located at the lower part inside the support platform (1).

2. The auxiliary support device for steel structure welding according to claim 1, characterized in that: The inner wall support clamping assembly (7) includes a movable seat (71), a clamping plate (72), a pressure rod (73), a placement groove (74), and rolling elements (75). The movable seat (71) is sleeved on the right end surface of the two sliding support rods (6) and is slidably connected to the sliding support rods (6). The upper ends of the front and rear sides of the movable seat (71) extend out of the support platform (1) and are slidably connected to the support platform (1). The clamping plate (72) is fixedly connected to the upper end of the movable seat (71). The pressure rod (73) is fixedly connected to the lower surface of the movable seat (71). The placement groove (74) is opened on the upper surface of the lower right end of the clamping plate (72). The number of rolling elements (75) is several and they are evenly arranged inside the placement groove (74).

3. The auxiliary support device for steel structure welding according to claim 2, characterized in that: The rolling element (75) includes a rotating shaft (751) and a roller (752). The rotating shaft (751) is disposed inside the placement groove (74), and its left and right ends are rotatably connected to the left and right sides of the placement groove (74) respectively. The roller (752) is sleeved on the surface of the rotating shaft (751) and rotatably connected to the rotating shaft (751), and its upper side extends out of the placement groove (74). The upper side of the roller (752) contacts the lower side of the I-beam (3).

4. The auxiliary support device for steel structure welding according to claim 3, characterized in that: Rubber anti-slip pads (9) are fixedly connected to the surfaces of the two clamping plates (72) that are far apart from each other.

5. The auxiliary support device for steel structure welding according to claim 2, characterized in that: The control mechanism (8) includes a linkage component (81) and a drive component (82). The linkage component (81) is located at the lower end of the two pressure rods (73), and the drive component (82) is located at the front side of the lower end of the linkage component (81).

6. The auxiliary support device for steel structure welding according to claim 5, characterized in that: The linkage component (81) includes a rotating rod (811), a drive disc (812), an arc-shaped extrusion groove (813), and a worm gear (814). The rotating rod (811) is located inside the support platform (1), and both its upper and lower ends are rotatably connected to the support platform (1). The drive disc (812) is sleeved on the surface of the rotating rod (811) and is fixedly connected to the rotating rod (811). There are two arc-shaped extrusion grooves (813), which are respectively opened on the left and right sides of the drive disc (812) and correspond to the positions of the two pressure rods (73). The lower ends of the two pressure rods (73) are respectively located inside the two arc-shaped extrusion grooves (813) and are movably connected to the arc-shaped extrusion grooves (813). The worm gear (814) is sleeved on the lower surface of the rotating rod (811) and is fixedly connected to the rotating rod (811).

7. The auxiliary support device for steel structure welding according to claim 6, characterized in that: The driving component (82) includes a worm (821), a motor (822), a protective shell (823), and heat dissipation holes (824). The worm (821) is located on the front side of the worm wheel (814) and meshes with the worm wheel (814). Both the left and right ends of the worm (821) are rotatably connected to the support platform (1), and the right end extends out of the support platform (1). The motor (822) is fixedly connected to the right end of the worm (821) and is fixedly connected to the front surface of the support platform (1). The protective shell (823) is sleeved on the surface of the motor (822) and is fixedly connected to the front surface of the support platform (1). The number of heat dissipation holes (824) is several, and they are evenly fixedly connected to the upper and lower surfaces of the protective shell (823).

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