Cross welding point auxiliary positioning device for field welding of large-span net rack

Abstract

The utility model belongs to the technical field of steel structure welding, and discloses a cross welding point auxiliary positioning device for on-site welding of a large-span net rack. Comprising a supporting assembly, a fixing assembly, a position fixing assembly and an adjusting assembly, the supporting assembly comprises a central plate, four sets of mounting grooves are formed in one side of the central plate and distributed in the outer wall of the central plate in a circular shaft mode, adjusting rollers are rotationally connected to the inner walls of the mounting grooves, and a fixing plate is fixedly connected to the top ends of the adjusting rollers; according to the device, the multiple supporting rods are installed on the side portion of the central plate, the positions of multiple sets of steel pipes can be supported according to requirements, due to the fixing clamping plates installed at the front ends of the supporting rods, the steel pipes can be clamped and fixed through the fixing clamping plates, the front ends of the multiple sets of steel pipes are opposite, and therefore the steel pipe welding stability is guaranteed; and meanwhile, multiple groups of steel pipes can be conveniently welded, and the problem that the steel pipes are easily influenced by external factors during welding is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure welding, and more specifically, to a cross welding point auxiliary positioning device for on-site welding of a large-span grid. Background Art

[0002] Large-span grid is a structural form commonly used in construction projects. It mainly supports roofs or other large-area structures through network-like trusses. Grid structures usually use steel pipes or aluminum materials, have high strength and rigidity, and are light in weight. They can achieve large-span open spaces and do not require a large number of internal support columns. The design can be flexibly adjusted as needed to adapt to different architectural forms and functional requirements. It is widely used in sports stadiums, exhibition centers and industrial plants.

[0003] In the prior art, since the steel pipes to be welded are relatively large and have strong toughness and resilience, during welding, the steel pipes are affected by external factors (for example, vibrations caused by large-scale construction machinery and strong natural winds), and the swing is difficult to control, resulting in the welding failing to achieve the desired effect, directly affecting the quality of the grid and posing great work challenges to the construction personnel. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model proposes a cross welding point auxiliary positioning device for on-site welding of a large-span grid.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cross welding point auxiliary positioning device for on-site welding of a large-span grid, comprising a support assembly, a fixing assembly, a retaining assembly and an adjusting assembly, wherein the support assembly comprises a central plate, a mounting groove is provided on one side of the central plate, four groups of the mounting grooves are provided and are distributed on the outer wall of the central plate in the form of circular axes, an adjusting roller is rotatably connected to the inner wall of the mounting groove, a fixing plate is fixedly connected to the top end of the adjusting roller, and a support rod is fixedly connected to the inner wall of the fixing plate;

[0006] The fixing assembly comprises a moving plate, the moving plate is slidably connected to the inner wall of the supporting rod, and a fixing clamping plate is arranged on the top of the moving plate;

[0007] The fixing assembly comprises a stabilizing sleeve, which is arranged at the bottom of the central plate, an extension rod is sleeved on the inner wall of the stabilizing sleeve, and a suction cup is fixedly connected to the bottom of the extension rod;

[0008] The adjusting assembly comprises a gear, the gear is fixedly connected to the bottom of the fixed clamping plate, and the gear is rotatably connected to the top of the moving plate.

[0009] Furthermore, regulating grooves are provided on both sides of the support rod, and moving wheels are rotatably connected to both sides of the movable plate. The moving wheels are slidably connected in the regulating grooves, and fixing grooves are provided on the outer edges of the regulating grooves. A fixing hole is provided at one end of the movable wheel, and a fixing button is threadedly connected to the fixing hole, and one end of the fixing button is fitted in the fixing groove.

[0010] Furthermore, both sides of the fixing clamping plate are threadedly connected with fixing screws, one end of the fixing screws is rotatably connected with a fastening plate, and one side of the fastening plate is fixedly connected with a protective pad.

[0011] Furthermore, a positioning screw is threadedly connected to the side of the stabilizing sleeve, a plurality of positioning holes are opened on one side of the extension rod, one end of the positioning screw is threadedly connected in the positioning hole, and a connecting button is fixedly connected to the top end of the stabilizing sleeve, and the connecting button is threadedly connected to the center of the central plate.

[0012] Furthermore, the inner wall of the adjusting roller is sleeved with a connecting rod, the connecting rod is fixedly connected to the inner wall of the mounting groove, one end of the connecting rod is sleeved with a blocking plate, the blocking plate is fixedly connected to the inner wall of the mounting groove, one side of the blocking plate is provided with a tooth groove, one end of the adjusting roller is provided with a docking tooth, the docking tooth and the tooth groove are engaged with each other, the outer wall of the connecting rod is sleeved with a spring rod, the spring rod is fixedly connected between the blocking plate and the mounting groove.

[0013] Furthermore, a mounting frame is fixedly connected to one side of the movable plate, a hydraulic cylinder is fixedly connected to one side of the mounting frame, a movable slide groove is opened at the top of the movable plate, a rack is fixedly connected to the output end of the hydraulic cylinder, the rack is slidably connected to the inner wall of the movable slide groove, the top of the rack is meshed with the bottom of the gear, the top of the movable plate is fixedly connected to a side plate, and the gear is rotatably connected to one side of the side plate.

[0014] Furthermore, a support plate is fixedly connected to the top of the central plate, the top of the support plate is arc-shaped, and the support plates are provided in multiple groups and are distributed in a circle on the top of the central plate.

[0015] Furthermore, a placement rack is fixedly connected to one side of the central plate, the placement rack is in an L-shape, and the top end of the placement rack is in an arc shape.

[0016] The technical effects and advantages of the utility model of a cross welding point auxiliary positioning device for on-site welding of a large-span grid are as follows:

[0017] (1) By installing multiple support rods on the side of the central plate, the positions of multiple groups of steel pipes can be supported according to needs. Due to the fixed clamp installed at the front end of the support rod, the steel pipe can be clamped and fixed by the fixed clamp, so that the front ends of the multiple groups of steel pipes are relative, thereby ensuring the stability of steel pipe welding. At the same time, it is convenient to weld the multiple groups of steel pipes, solving the problem that the steel pipe welding is easily affected by external factors.

[0018] (2) An adjusting roller is installed at the tail end of the support rod. The adjusting roller is rotatably connected in the installation groove, so that when the support rod swings up and down, the inclination angle of the steel pipe can be adjusted. At the same time, the movable plate can slide in the support rod to adjust the clamping position of the steel pipe, which further improves the flexibility of the device. By arranging gears and racks at the bottom of the fixed clamping plate, the angle of the fixed clamping plate can be adjusted to adapt to the angle of the end of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the suction cup and the central plate structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the movable plate and the fixed clamping plate of the utility model.

[0022] Figure 4 for Figure 3 A is an enlarged structural diagram of FIG.

[0023] Figure 5 It is a partial cross-sectional schematic diagram of the movable plate in the utility model.

[0024] Figure 6 This is a structural diagram of the connection between the stabilizing sleeve and the extension rod in the utility model.

[0025] Figure 7 This is a structural diagram of the barrier plate and the surrounding of the regulating roller in the utility model.

[0026] In the figure:

[0027] 1. Support assembly; 101. Central plate; 102. Mounting slot; 103. Adjusting roller; 1031. Connecting rod; 1032. Blocking plate; 1033. Docking tooth; 1034. Tooth slot; 1035. Spring rod; 104. Fixing plate; 105. Support rod; 106. Adjusting slide; 107. Retention slide; 2. Fixing assembly; 201. Moving plate; 202. Moving wheel; 203. Fixing Positioning hole; 204, retaining button; 205, fixing splint; 206, fixing screw; 3, retaining assembly; 301, connecting button; 302, stabilizing sleeve; 303, positioning screw; 304, extension rod; 305, positioning hole; 306, suction cup; 4, adjustment assembly; 401, mounting bracket; 402, hydraulic cylinder; 403, rack; 404, gear; 405, side panel; 5, support plate; 6, placement rack. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1

[0030] Reference Figure 1-7 , a cross welding point auxiliary positioning device for field welding of a large-span grid, comprising a support assembly 1, a fixing assembly 2, a retaining assembly 3 and an adjusting assembly 4, wherein the support assembly 1 comprises a central plate 101, a mounting groove 102 is provided on one side of the central plate 101, four groups of the mounting grooves 102 are provided and are distributed on the outer wall of the central plate 101 in the form of a circular axis, an adjusting roller 103 is rotatably connected to the inner wall of the mounting groove 102, a fixing plate 104 is fixed to the top end of the adjusting roller 103, and a support rod 105 is fixed to the inner wall of the fixing plate 104;

[0031] The fixing assembly 2 includes a moving plate 201, the moving plate 201 is slidably connected to the inner wall of the support rod 105, and a fixing clamping plate 205 is provided at the top of the moving plate 201;

[0032] The fixing assembly 3 includes a fixing sleeve 302, which is disposed at the bottom of the central plate 101. An extension rod 304 is sleeved on the inner wall of the fixing sleeve 302, and a suction cup 306 is fixed to the bottom of the extension rod 304.

[0033] The adjusting assembly 4 includes a gear 404 , which is fixed to the bottom of the fixed clamping plate 205 , and the gear 404 is rotatably connected to the top of the moving plate 201 .

[0034] In order to solve the problem that the steel pipe is easily affected by external factors during welding, when it is necessary to weld the steel pipe of the large-span grid, a suction cup 306 is set at the bottom of the extension rod 304, so that when welding is required, the suction cup 306 can be sucked to the ground, so that the extension rod 304, the stabilizing sleeve and the central plate 101 and other structures can be fixed, and the central plate 101 can be ensured to be at the center point of the welded steel pipe. The extension rod 304 can also be used to adjust the height of the central plate 101, and then the angle of the movable plate 201 can be adjusted according to the steel pipe. The adjusting roller 103 can be adjusted to the angle as needed. Since there is friction resistance between the adjusting roller 103 and the inner wall of the mounting groove 102, when the adjusting roller 103 is adjusted to the appropriate position, it is automatically positioned at the inclination angle. In terms of degree, after the position adjustment of the adjusting roller 103 is completed, the angles of the fixed plate 104, the support rod 105 and the movable plate 201 arranged above it will also change together, so as to adapt to the angle required for steel pipe welding. The movable plate 201 slides on the inner wall of the support rod 105, and the distance between the two groups of movable plates 201 can be adjusted according to the length of the steel pipe, so as to adjust the length of the support, and the gear 404 arranged on the movable plate 201 will adjust the angle of the fixed clamping plate 205 when rotating, until the angle of the fixed clamping plate 205 fits the end of the steel pipe, so as to facilitate fixing the two ends of the steel pipe by the fixed clamping plate 205. After the positions of the two groups of steel pipes are fixed, the joints of the steel pipes can be welded, so as to prevent external factors from affecting the welding process of the steel pipes.

[0035] Reference Figure 4 , regulating grooves 106 are provided on both sides of the support rod 105, and moving wheels 202 are rotatably connected on both sides of the moving plate 201. The moving wheels 202 are slidably connected in the regulating grooves 106, and a retaining groove 107 is provided on the outer edge of the regulating grooves 106. A retaining hole 203 is provided at one end of the moving wheel 202, and a retaining button 204 is threadedly connected to the retaining hole 203, and one end of the retaining button 204 is fitted in the retaining groove 107.

[0036] The width of the movable plate 201 matches that of the support rod 105, and the diameter of the movable wheel 202 matches that of the regulating slot 106, thereby improving the stability of the movement of the movable plate 201. By moving the movable plate 201, the support position of the steel pipe clamped at the top can be adjusted. The width of the retaining slot 107 is greater than the regulating slot 106. When the movable plate 201 is adjusted to an appropriate position, the retaining button 204 is rotated so that the retaining button 204 is tightly attached to the retaining slot 107, thereby fixing the position of the movable plate 201.

[0037] Reference Figure 5The two sides of the fixing clamp plate 205 are threadedly connected with fixing screws 206, one end of the fixing screw 206 is rotatably connected with a fastening plate, and one side of the fastening plate is fixedly connected with a protective pad.

[0038] When the steel pipe is placed between the fixing clamps 205, the fixing screw 206 is moved toward the center by rotating in the forward direction, and the fastening plate set on one side is pushed to move together until one side of the fastening plate is tightly attached to the side of the steel pipe, so that the steel pipe can be fixed. By setting a protective pad, the steel pipe can be prevented from being scratched when it is fixed. By rotating the fixing screw 206 in the reverse direction, the fastening plate can be separated from the steel pipe, so that it can be telescoped according to the thickness of the steel pipe.

[0039] Reference Figure 6 The side of the stabilizing sleeve 302 is threadedly connected with a positioning screw 303, and one side of the extension rod 304 is provided with multiple groups of positioning holes 305. One end of the positioning screw 303 is threadedly connected in the positioning hole 305. The top end of the stabilizing sleeve 302 is fixedly connected with a connecting button 301, and the connecting button 301 is threadedly connected to the center of the central plate 101.

[0040] The extension rod 304 can be telescopically moved in the stabilizing sleeve 302 to adjust the support height. When the adjustment is completed, the positioning screw 303 is rotated forward so that the front end is inserted into the corresponding positioning hole 305 to fix the adjusted height. After the positioning screw 303 is rotated reversely so that the front end is separated from the positioning hole 305, the extension rod 304 can be telescopically adjusted in the stabilizing sleeve 302.

[0041] Reference Figure 7 The inner wall of the adjusting roller 103 is sleeved with a connecting rod 1031, and the connecting rod 1031 is fixedly connected to the inner wall of the mounting groove 102. One end of the connecting rod 1031 is sleeved with a blocking plate 1032, and the blocking plate 1032 is fixedly connected to the inner wall of the mounting groove 102. A tooth groove 1034 is provided on one side of the blocking plate 1032. A docking tooth 1033 is provided at one end of the adjusting roller 103, and the docking tooth 1033 is engaged with the tooth groove 1034. The outer wall of the connecting rod 1031 is sleeved with a spring rod 1035, and the spring rod 1035 is fixedly connected between the blocking plate 1032 and the mounting groove 102.

[0042] The blocking plate 1032 is slidably connected to the inner wall of the connecting rod 1031, so that when one side of the blocking plate 1032 with the tooth groove 1034 is in contact with the side of the adjusting roller 103 with the docking tooth 1033, the docking tooth 1033 is engaged with the tooth groove 1034, so that the adjusting roller 103 cannot rotate, thereby fixing the inclination angle of the support rod 105. When the adjusting roller 103 is pulled to one side, the adjusting roller 103 is separated from one side of the blocking plate 1032, so that the support rod 105 can swing up and down, thereby adjusting the inclination angle. The spring rod 1035 has the function of pushing the blocking plate 1032, which can enable the blocking plate 1032 to engage with the adjusting roller 103.

[0043] Reference Figure 5 A mounting frame 401 is fixedly connected to one side of the movable plate 201, a hydraulic cylinder 402 is fixedly connected to one side of the mounting frame 401, a movable slide groove is opened at the top of the movable plate 201, a rack 403 is fixedly connected to the output end of the hydraulic cylinder 402, the rack 403 is slidably connected to the inner wall of the movable slide groove, the top of the rack 403 is meshed with the bottom of the gear 404, a side plate 405 is fixedly connected to the top of the movable plate 201, and the gear 404 is rotatably connected to one side of the side plate 405.

[0044] When it is necessary to adjust the angle of the fixed splint 205, the hydraulic cylinder 402 can be started. When the hydraulic cylinder 402 is started, it will push the rack 403 to move to one side. By setting a moving slide groove, the moving trajectory of the rack 403 can be guided, and the rack 403 will drive the top meshing gear 404 to rotate when it moves. When the gear 404 rotates, it will drive the fixed splint 205 to deviate until the fixed splint 205 is adjusted to a suitable angle. Then the operation of the hydraulic cylinder 402 is stopped. The angle of the fixed splint 205 can be adjusted according to the needs of the steel pipe, so that the fixed splint 205 can clamp and fix the steel pipe.

[0045] Reference Figure 2 A support plate 5 is fixedly connected to the top of the central plate 101 . The top of the support plate 5 is arc-shaped. There are multiple groups of support plates 5 , which are distributed in a circle on the top of the central plate 101 .

[0046] By arranging multiple groups of supporting plates 5 at the top of the central plate 101, when encountering a steel pipe with a larger arc, it is convenient to lift the steel pipe through the arc at the top of the supporting plate 5, which is more conducive to fixing the position of the steel pipe.

[0047] Reference Figure 2 A placement rack 6 is fixedly connected to one side of the central plate 101. The placement rack 6 is L-shaped, and the top of the placement rack 6 is arc-shaped.

[0048] By providing a placement rack 6 on one side of the central plate 101, it is convenient to place the tools for auxiliary welding on the placement rack 6, so that the operator can take the tools in time.

[0049] Working principle: In order to solve the problem that the steel pipe is easily affected by external factors during welding, when welding of steel pipes of large-span grids is required, a suction cup 306 is set at the bottom of the extension rod 304. When welding is required, the suction cup 306 can be sucked to the ground, so that the extension rod 304, the stabilizing sleeve and the central plate 101 and other structures can be fixed, and the central plate 101 can be ensured to be at the center point of the welded steel pipe. The extension rod 304 can be telescopically moved in the stabilizing sleeve 302 to adjust the support height. When the adjustment is completed, The positioning screw 303 is rotated in the forward direction to insert its front end into the corresponding positioning hole 305, so as to fix the adjusted height. Then, the angle of the movable plate 201 is adjusted according to the steel pipe. When the adjusting roller 103 is pulled to move to one side, the adjusting roller 103 is separated from one side of the blocking plate 1032, so that the support rod 105 can swing up and down, thereby adjusting the tilt angle. After the adjustment is completed, the spring rod 1035 can be used to urge one side of the blocking plate 1032 provided with the tooth groove 1034 to be aligned with one side of the adjusting roller 103 provided with the docking tooth 1033 The sides of the adjusting roller 103 are fitted together, so that the docking tooth 1033 is engaged with the tooth groove 1034, thereby fixing the position of the adjusting roller 103 and fixing the tilt angle of the support rod 105. After the position of the adjusting roller 103 is adjusted, the angles of the fixed plate 104, the support rod 105 and the movable plate 201 arranged above it will also change together, so as to adapt to the angle required for steel pipe welding. The movable plate 201 slides on the inner wall of the support rod 105, and the distance between the two sets of movable plates 201 can be adjusted according to the length of the steel pipe, so as to adjust the length of the support. The width of the moving plate 201 matches that of the support rod 105, and the diameter of the moving wheel 202 matches that of the regulating chute 106, thereby improving the stability of the movement of the moving plate 201. By moving the moving plate 201, the position of the steel pipe support clamped at the top can be adjusted. The width of the retaining chute 107 is greater than the regulating chute 106. When the moving plate 201 is adjusted to a proper position, the retaining button 204 is rotated so that the retaining button 204 is tightly attached to the retaining chute 107, thereby fixing the position of the moving plate 201.

[0050] When the angle of the fixed splint 205 needs to be adjusted, the hydraulic cylinder 402 can be started to push the rack 403 to move to one side. By setting a moving slide groove, the moving trajectory of the rack 403 can be guided, and the rack 403 will drive the gear 404 meshing at the top to rotate when moving. When the gear 404 rotates, it will drive the fixed splint 205 to deviate until the fixed splint 205 is adjusted to a suitable angle. Then the operation of the hydraulic cylinder 402 is stopped, and the angle of the fixed splint 205 can be adjusted according to the needs of the steel pipe, so that the two ends of the steel pipe can be fixed by the fixed splint 205. For fixing, when the steel pipe is placed between the fixing clamps 205, the fixing screw 206 is rotated in the forward direction to move toward the center, and the fastening plate set on one side is pushed to move together until one side of the fastening plate is tightly against the side of the steel pipe, so that the steel pipe can be fixed. By setting a protective pad, the steel pipe can be prevented from being scratched when it is fixed, and the fixing screw 206 is rotated in the reverse direction to make the fastening plate detach from the steel pipe, so that it can be adjusted according to the thickness of the steel pipe. After the positions of the two groups of steel pipes are fixed, the connection of the steel pipes can be welded, which is beneficial to prevent external factors from affecting the welding process of the steel pipes.

[0051] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A cross welding point auxiliary positioning device for on-site welding of a large-span grid, comprising a support component (1), a fixing component (2), a retaining component (3) and an adjusting component (4), characterized in that: The support assembly (1) comprises a central plate (101), a mounting groove (102) is provided on one side of the central plate (101), four groups of the mounting grooves (102) are arranged and are distributed on the outer wall of the central plate (101) in the form of a circular axis, an adjusting roller (103) is rotatably connected to the inner wall of the mounting groove (102), a fixing plate (104) is fixedly connected to the top end of the adjusting roller (103), and a support rod (105) is fixedly connected to the inner wall of the fixing plate (104); The fixing assembly (2) comprises a movable plate (201), the movable plate (201) being slidably connected to the inner wall of the support rod (105), and a fixing clamping plate (205) being provided at the top end of the movable plate (201); The retaining assembly (3) comprises a stabilizing sleeve (302), the stabilizing sleeve (302) being arranged at the bottom of the central plate (101), an extension rod (304) being sleeved on the inner wall of the stabilizing sleeve (302), and a suction cup (306) being fixedly connected to the bottom of the extension rod (304); The adjustment assembly (4) comprises a gear (404), wherein the gear (404) is fixedly connected to the bottom of the fixed clamping plate (205), and the gear (404) is rotatably connected to the top of the movable plate (201).

2. The cross welding point auxiliary positioning device for on-site welding of a large-span grid according to claim 1 is characterized in that: The support rod (105) is provided with regulating grooves (106) on both sides, the movable plate (201) is rotatably connected with movable wheels (202) on both sides, the movable wheels (202) are slidably connected in the regulating grooves (106), the outer edge of the regulating grooves (106) is provided with retaining grooves (107), one end of the movable wheel (202) is provided with a retaining hole (203), the retaining hole (203) is internally threadedly connected with a retaining button (204), and one end of the retaining button (204) is fitted in the retaining groove (107).

3. The cross welding point auxiliary positioning device for on-site welding of a large-span grid according to claim 2 is characterized in that: Both sides of the fixing clamping plate (205) are threadedly connected with fixing screws (206), one end of the fixing screw (206) is rotatably connected with a fastening plate, and one side of the fastening plate is fixedly connected with a protection pad.

4. The cross welding point auxiliary positioning device for on-site welding of a large-span grid according to claim 3 is characterized in that: A positioning screw (303) is threadedly connected to the side of the stabilizing sleeve (302), a plurality of positioning holes (305) are provided on one side of the extension rod (304), one end of the positioning screw (303) is threadedly connected to the positioning hole (305), and a connecting button (301) is fixedly connected to the top end of the stabilizing sleeve (302), and the connecting button (301) is threadedly connected to the center of the central plate (101).

5. The cross welding point auxiliary positioning device for on-site welding of a large-span grid according to claim 4 is characterized in that: The inner wall of the adjusting roller (103) is sleeved with a connecting rod (1031), the connecting rod (1031) is fixedly connected to the inner wall of the mounting groove (102), one end of the connecting rod (1031) is sleeved with a blocking plate (1032), the blocking plate (1032) is fixedly connected to the inner wall of the mounting groove (102), one side of the blocking plate (1032) is provided with a latching tooth groove (1034), one end of the adjusting roller (103) is provided with a docking latching tooth (1033), the docking latching tooth (1033) and the latching tooth groove (1034) are mutually engaged, and the outer wall of the connecting rod (1031) is sleeved with a spring rod (1035), the spring rod (1035) is fixedly connected between the blocking plate (1032) and the mounting groove (102).

6. The cross welding point auxiliary positioning device for on-site welding of a large-span grid according to claim 5 is characterized in that: A mounting frame (401) is fixedly connected to one side of the movable plate (201), a hydraulic cylinder (402) is fixedly connected to one side of the mounting frame (401), a movable slide groove is provided at the top end of the movable plate (201), a rack (403) is fixedly connected to the output end of the hydraulic cylinder (402), the rack (403) is slidably connected to the inner wall of the movable slide groove, the top end of the rack (403) is meshed with the bottom of the gear (404), a side plate (405) is fixedly connected to the top end of the movable plate (201), and the gear (404) is rotatably connected to one side of the side plate (405).

7. The cross welding point auxiliary positioning device for on-site welding of a large-span grid according to claim 6 is characterized in that: A support plate (5) is fixedly connected to the top end of the central plate (101); the top end of the support plate (5) is in an arc shape; a plurality of groups of support plates (5) are provided and are distributed in a circle at the top end of the central plate (101).

8. The cross welding point auxiliary positioning device for on-site welding of a large-span grid according to claim 7 is characterized in that: A placement rack (6) is fixedly connected to one side of the central plate (101); the placement rack (6) is in an L-shape, and the top end of the placement rack (6) is in an arc shape.

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