Photovoltaic support welding positioning device

Abstract

The invention belongs to the technical field of photovoltaic support welding, and particularly relates to a photovoltaic support welding positioning device which comprises a workbench, cylindrical rods are slidably arranged at the four corners of the upper end of the workbench correspondingly, and first L-shaped rods are slidably arranged at the positions, corresponding to the cylindrical rods, of the upper portion of the workbench correspondingly; clamping assemblies are arranged at the upper ends of the first L-shaped rods correspondingly, each clamping assembly comprises two clamping blocks rotationally arranged at one end of the corresponding first L-shaped rod, a welding mechanical arm is arranged on one side of the workbench, a supporting assembly is arranged at the upper end of the workbench, and each supporting assembly comprises a set of third rectangular strips slidably arranged on the two sides of the workbench correspondingly; and one group of third rectangular strips comprises two third rectangular strips, the third rectangular strips in the same group slide synchronously, U-shaped blocks are rotationally arranged at the upper ends of the third rectangular strips correspondingly, manual splicing is not needed, errors generated during splicing are reduced, and stability can be kept during welding.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic bracket welding technology, specifically a photovoltaic bracket welding positioning device. Background Technology

[0002] Solar photovoltaic (PV) brackets are key structural components in solar PV power generation systems used to support and fix solar panels. Their main function is to ensure that solar panels can be stably installed at a preset tilt angle to maximize the reception of solar energy and improve photoelectric conversion efficiency. When installing PV panels on water, columns need to be installed in the water first, and then the PV brackets are installed on the columns in the water.

[0003] A patent application with publication number CN120680234A discloses a welding positioning fixture for solar photovoltaic brackets. Through the cooperation of a drive component and multiple placement seats, the position of multiple legs of the solar photovoltaic bracket can be adjusted simultaneously to meet the welding requirements of solar photovoltaic brackets of different sizes, effectively improving work efficiency and positioning accuracy. The design of the flexible sliding component allows the fixed legs to slide relative to the slider to a certain extent, thereby releasing the expansion force on the bracket during welding and avoiding damage or poor welding results caused by internal stress. Through the cooperation of the control component and the loosening component, the legs can be automatically fixed within the placement seats during the adjustment of multiple leg positions, ensuring a constant position of the legs during welding. Furthermore, after welding is completed, the operation of the flexible sliding component automatically releases the fixation between the legs and the placement seats, facilitating the removal of the welded bracket and further improving work efficiency.

[0004] In the aforementioned prior art, when assembling a photovoltaic support system installed on a column in water, a ring needs to be installed on the outside of the column. The ring needs to be welded to a steel pipe to form a photovoltaic support system. Then, the photovoltaic panel is installed on the upper end of the support system, and the support system is installed on the outside of the column in water. When welding the photovoltaic support system, different irregularly shaped pipes need to be welded together. The assembly process often requires manual splicing, which is prone to errors and has low splicing efficiency.

[0005] Therefore, the present invention provides a photovoltaic bracket welding positioning device. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A photovoltaic bracket welding positioning device of the present invention includes a worktable, cylindrical rods are slidably arranged at the four corners of the upper end of the worktable, and first L-shaped rods are slidably arranged above the worktable corresponding to the positions of each cylindrical rod. Each first L-shaped rod has a clamping assembly at its upper end. The clamping assembly includes two clamping blocks rotatably arranged at one end of the first L-shaped rod. A welding robotic arm is arranged on one side of the worktable, and a support assembly is arranged at the upper end of the worktable. The support assembly includes a group of third rectangular bars slidably arranged on both sides of the worktable. The third rectangular bars include two third rectangular bars. The third rectangular bars in the same group slide synchronously, and U-shaped blocks are rotatably arranged at the upper ends of the third rectangular bars.

[0008] Preferably, a first circular plate is fixed to the upper end of the workbench via a connecting block, and a first rectangular hole is opened at each of the four corners of the middle part of the first circular plate. The cylindrical rod is slidably disposed in the first rectangular hole via a rectangular slider.

[0009] Preferably, a second circular plate is rotatably disposed between the worktable and the first circular plate. The second circular plate has arc-shaped holes respectively at the positions corresponding to the first rectangular holes. The lower ends of the rectangular sliders are respectively fixed to first rectangular strips, and the lower sides of each first rectangular strip are respectively slidably disposed in the arc-shaped holes through cylindrical blocks.

[0010] Preferably, a first rectangular tube is fixedly connected to the upper side of the end of the first rectangular strip away from the cylindrical block, and the first L-shaped rod is slidably disposed inside the first rectangular tube.

[0011] Preferably, a second rectangular hole is provided on one side of the first rectangular tube, and a second L-shaped rod is rotatably provided at the lower end of the first L-shaped rod. The second L-shaped rod is slidably provided inside the first rectangular tube through the second rectangular hole. A second rectangular strip is fixed to one side of the second L-shaped rod. A ring is slidably provided on the outer side of each of the first L-shaped rods, and each of the second rectangular strips slides through the middle of the ring.

[0012] Preferably, a rectangular plate is fixed to the lower end of the workbench, and the lower ends of both sides of the ring are fixed to the upper end of the rectangular plate through electric telescopic rods. Irregular plates are fixed to both sides of the ring corresponding to the third rectangular strip. A third rectangular hole is opened in the middle of the irregular plate, and the third rectangular strip is slidably disposed inside the third rectangular hole.

[0013] Preferably, a fourth rectangular hole is opened on each side of the rectangular plate corresponding to the positions of the two sets of third rectangular strips, and the third rectangular strips are slidably disposed inside the rectangular slider.

[0014] Preferably, first rectangular blocks are slidably disposed on both sides of the upper end of the fourth rectangular hole, the third rectangular strip is slidably disposed within the first rectangular blocks, and a bidirectional lead screw is threadedly connected to the middle of the two first rectangular blocks. The two ends of the bidirectional lead screw are rotatably disposed on the upper end of the rectangular plate through the second rectangular blocks.

[0015] Preferably, the four corners of the lower end of the rectangular plate are fixed to a first base plate by support legs, and a second base plate is provided at the lower end of the first base plate, with the first base plate rotatably mounted on the upper end of the second base plate.

[0016] Preferably, a fourth rectangular bar is rotatably disposed at the lower end of the third rectangular bar, and a second rectangular tube is rotatably disposed on both sides of the upper end of the rectangular plate via a support rod, with the ends of the two fourth rectangular bars slidingly disposed inside the two ends of the second rectangular tube.

[0017] The beneficial effects of this invention are as follows: 1. The photovoltaic bracket welding positioning device of the present invention fixes the circular tube by driving the cylindrical rod, fixes the straight tube by clamping block, installs the straight tube at the four corners of the upper end of the circular tube, adjusts the two straight tubes to the inclined angle by driving the U-shaped block, splices the inclined straight tubes to the upper end of the straight tubes held by the clamping block, and after splicing, the welding robot arm welds the joints of each tube without manual splicing, reducing the error during splicing and maintaining stability during welding.

[0018] 2. The photovoltaic bracket welding positioning device of the present invention, when fixing the annular tube by driving the cylindrical rod to move, the cylindrical rod drives the first rectangular cylinder to move through the first rectangular bar, the first rectangular cylinder drives the first L-shaped rod to move, and when the first L-shaped rod moves, it drives the second rectangular bar to slide in the middle of the annular tube. The first L-shaped rod drives the straight tube clamped in the middle of the clamping block to move, so that the clamping block is always located at the upper end of the annular tube. When the cylindrical rod is adjusted according to the annular tube of different sizes, it simultaneously drives the clamping block to adjust, so that the straight tube clamped by the clamping block can always be located at the upper end of the annular tube. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of Embodiment 1 of the present invention; Figure 2 This is a diagram showing the location of the workbench; Figure 3 This is a schematic diagram showing the position of the cylindrical rod; Figure 4 This is a schematic diagram of the clamping block position; Figure 5 This is a diagram showing the position of the circular ring; Figure 6 This is a schematic diagram showing the position of the third rectangular bar; Figure 7 This is a schematic diagram showing the position of the first rectangular block; In the diagram: 1. Workbench; 11. First circular plate; 111. First rectangular hole; 12. Second circular plate; 121. Arc-shaped hole; 13. Cylindrical rod; 131. Rectangular slider; 14. First L-shaped rod; 141. First rectangular cylinder; 1411. Second rectangular hole; 142. First rectangular strip; 143. Cylindrical block; 144. Clamping block; 145. Second L-shaped rod; 1451. Second rectangular strip; 15. Ring; 151. Irregularly shaped plate 1511, Third rectangular hole; 152, Electric telescopic rod; 16, Third rectangular bar; 161, Fourth rectangular bar; 162, Second rectangular tube; 163, Support rod; 164, First rectangular block; 165, Bidirectional lead screw; 166, Second rectangular block; 167, U-shaped block; 17, Connecting block; 2, Welding robotic arm; 3, Rectangular plate; 31, Fourth rectangular hole; 32, Support leg; 33, First base plate; 34, Second base plate. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figure 1 - Figure 7 As shown in the embodiment of the present invention, a photovoltaic bracket welding positioning device includes a workbench 1. Cylindrical rods 13 are slidably disposed at the four corners of the upper end of the workbench 1. First L-shaped rods 14 are slidably disposed above the workbench 1 corresponding to the positions of each cylindrical rod 13. Each first L-shaped rod 14 has a clamping assembly at its upper end. The clamping assembly includes two clamping blocks 144 rotatably disposed at one end of each first L-shaped rod 14. A welding robotic arm 2 is disposed on one side of the workbench 1. A support assembly is disposed at the upper end of the workbench 1. The support assembly includes a set of third rectangular bars 16 slidably disposed on both sides of the workbench 1. Each set of third rectangular bars 16 includes two third rectangular bars 16. The third rectangular bars 16 in the same set slide synchronously. U-shaped blocks 167 are rotatably disposed at the upper ends of each third rectangular bar 16.

[0023] Specifically, when installing a photovoltaic (PV) support on a column in water, a ring needs to be installed on the outside of the column. This ring needs to be welded to a steel pipe to form the PV support. The PV panels are then installed on the top of the support, which is then installed on the outside of the column. Welding the PV support requires welding together various irregularly shaped pipes, often requiring manual assembly which is prone to errors and slow. Using this welding positioning device, the ring pipe is placed on the outside of each cylindrical rod 13, and then the cylindrical rod 13 is driven to slide outwards on the worktable 1, making each cylindrical rod 13 tightly against the inner wall of the ring pipe, thus fixing the ring pipe. Then, each straight pipe is placed between each clamping block 144, and the clamping blocks 144 are driven to clamp each straight pipe. Each set of clamping blocks 144 is driven to be positioned on the top of the ring pipe, and then the first L-shaped rod 14 is driven to slide downwards. The first L-shaped rod 14, through the clamping blocks 144, moves each straight pipe downwards, making each straight pipe... The shaped pipe fittings are all tightly attached to the upper end of the circular pipe fitting. Then, two straight pipe fittings are placed between two opposing U-shaped blocks 167. The U-shaped blocks 167 support the two straight pipe fittings. Then, the third rectangular strip 16 on one side is driven to slide downward, adjusting the straight pipes placed on the upper end of the U-shaped blocks 167 to an inclined angle. The photovoltaic panels can be installed on the inclined straight pipes, which can maximize the efficiency of the photovoltaic panels in receiving solar radiation, thereby increasing power generation. Then, the welding robotic arm 2 is driven to weld the assembled pipe fittings. The components are connected together. The circular tube is fixed by driving the cylindrical rod 13, and the straight tube is fixed by the clamping block 144. The straight tube is installed at the four corners of the upper end of the circular tube. Then, the two straight tubes are adjusted to the tilt angle by driving the U-shaped block 167. The tilted straight tube is spliced ​​on the upper end of the straight tube held by the clamping block 144. After the splicing is completed, the welding robot arm 2 welds the connection of each tube. There is no need for manual splicing, which reduces the error during splicing and can maintain stability during welding.

[0024] like Figure 3 As shown, the upper end of the workbench 1 is fixedly connected to a first circular plate 11 by a connecting block 17. The four corners of the middle part of the first circular plate 11 are respectively provided with first rectangular holes 111. The cylindrical rod 13 is slidably disposed in the first rectangular holes 111 by a rectangular slider 131.

[0025] like Figure 3 As shown, a second circular plate 12 is rotatably disposed between the workbench 1 and the first circular plate 11. The second circular plate 12 has arc-shaped holes 121 respectively at the positions corresponding to the first rectangular hole 111. The lower end of the rectangular slider 131 is fixedly connected to a first rectangular strip 142. Each of the first rectangular strips 142 is slidably disposed in the arc-shaped hole 121 through a cylindrical block 143 on the lower side of one end.

[0026] Specifically, by driving the second circular plate 12 to rotate, the cylindrical block 143 is driven to slide in the arc-shaped hole 121. The cylindrical block 143 drives the rectangular slider 131 to slide in the first rectangular hole 111 through the first rectangular bar 142. The first rectangular hole 111 drives the cylindrical rod 13 to slide outward, thereby fixing the annular tube placed on the outside of the cylindrical rod 13.

[0027] like Figure 4 As shown, the first rectangular bar 142 is fixedly connected to the upper side of the end away from the cylindrical block 143 with a first rectangular tube 141, and the first L-shaped rod 14 is slidably disposed inside the first rectangular tube 141.

[0028] like Figure 4 - Figure 5 As shown, a second rectangular hole 1411 is provided on one side of the first rectangular tube 141. A second L-shaped rod 145 is rotatably provided at the lower end of the first L-shaped rod 14. The second L-shaped rod 145 is slidably provided inside the first rectangular tube 141 through the second rectangular hole 1411. A second rectangular strip 1451 is fixedly connected to one side of the second L-shaped rod 145. A ring 15 is slidably provided on the outer side of each of the first L-shaped rods 14. Each of the second rectangular strips 1451 slides through the middle of the ring 15.

[0029] like Figure 2 , Figure 5 As shown, a rectangular plate 3 is fixed to the lower end of the workbench 1, and the lower ends of both sides of the ring 15 are fixed to the upper end of the rectangular plate 3 through an electric telescopic rod 152. The ring 15 is fixed to the two sides of the third rectangular strip 16 respectively with irregular plates 151. The irregular plate 151 has a third rectangular hole 1511 in the middle, and the third rectangular strip 16 is slidably disposed inside the third rectangular hole 1511.

[0030] Specifically, by driving the first L-shaped rod 14 to rotate at the upper end of the second L-shaped rod 145, the clamping block 144 is driven to clamp the vertically placed straight pipe fitting. When the driving cylindrical rod 13 moves to fix the annular pipe fitting, the cylindrical rod 13 drives the first rectangular tube 141 to move through the first rectangular bar 142. The first rectangular tube 141 drives the first L-shaped rod 14 to move. When the first L-shaped rod 14 moves, it causes the second rectangular bar 1451 to slide in the middle of the annular pipe 15. The first L-shaped rod 14 drives the straight pipe fitting clamped in the middle of the clamping block 144 to move, so that the clamping block 144 is always located in the annular pipe. At the upper end of the component, when the cylindrical rod 13 is adjusted according to the different sizes of the annular tube, it simultaneously drives the clamping block 144 to adjust, so that the straight tube clamped by the clamping block 144 can always be located at the upper end of the annular tube. Then, the electric telescopic rod 152 is driven to retract, causing the annular tube 15 to slide downward. The annular tube 15 drives the second L-shaped rod 145 to slide downward through the second rectangular bar 1451. The second L-shaped rod 145 drives the clamping block 144 to slide downward through the first L-shaped rod 14, causing the straight tube clamped in the middle of the clamping block 144 to move downward and splice with the annular tube.

[0031] like Figure 6 As shown, fourth rectangular holes 31 are respectively opened on both sides of the rectangular plate 3 at the positions of the two sets of third rectangular strips 16, and the third rectangular strips 16 are slidably disposed inside the rectangular slider 131.

[0032] like Figure 7 As shown, first rectangular blocks 164 are slidably disposed on both sides of the upper end of the fourth rectangular hole 31, and the third rectangular strip 16 is slidably disposed in the first rectangular block 164. The two first rectangular blocks 164 are threadedly connected to a bidirectional lead screw 165 in the middle. The two ends of the bidirectional lead screw 165 are rotatably disposed on the upper end of the rectangular plate 3 through the second rectangular block 166.

[0033] Specifically, by driving the bidirectional lead screw 165 to rotate, the first rectangular blocks 164 on both sides slide on the upper end of the rectangular plate 3. The first rectangular blocks 164 drive the two third rectangular strips 16 to move closer to each other, and the third rectangular strips 16 drive the U-shaped blocks 167 to move closer to each other, thereby adjusting the distance between the two straight tubes placed on the upper end of the U-shaped blocks 167. The distance between the straight tubes can be adjusted according to different sizes of photovoltaic brackets.

[0034] Example 2: Figure 2 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the four corners of the lower end of the rectangular plate 3 are fixed to a first base plate 33 by support legs 32, a second base plate 34 is provided at the lower end of the first base plate 33, and the first base plate 33 is rotatably disposed on the upper end of the second base plate 34.

[0035] like Figure 6As shown, a fourth rectangular bar 161 is rotatably disposed at the lower end of the third rectangular bar 16, and a second rectangular tube 162 is rotatably disposed on both sides of the upper end of the rectangular plate 3 via a support rod 163. The ends of the two fourth rectangular bars 161 are slidably disposed inside the two ends of the second rectangular tube 162.

[0036] Specifically, by driving the second rectangular tube 162 to rotate between the support rods 163, the second rectangular tube 162 drives the fourth rectangular bars 161 on both sides to rotate. At the same time, the fourth rectangular bars 161 slide into the second rectangular tube 162. The fourth rectangular bar 161 on one side drives the third rectangular bar 16 at the upper end to slide upward, and the fourth rectangular bar 161 on the other side drives the third rectangular bar 16 to slide downward, so that the third rectangular bars 16 on both sides drive the upper U-shaped block 167 to be in an inclined state, thereby allowing the straight pipe to be placed at an incline on the upper end of the U-shaped block 167.

[0037] Working principle: Before welding, the annular tube is placed outside each cylindrical rod 13. The second circular plate 12 is driven to rotate, causing the cylindrical block 143 to slide within the arc-shaped hole 121. The cylindrical block 143, through the first rectangular bar 142, drives the rectangular slider 131 to slide within the first rectangular hole 111. The first rectangular hole 111 drives the cylindrical rod 13 to slide outwards, thus fixing the annular tube placed outside the cylindrical rod 13. Then, the first L-shaped rod 14 is driven to rotate at the upper end of the second L-shaped rod 145, subsequently driving the clamping block 144 to clamp the vertically placed straight tube. When the cylindrical rod 13 moves to fix the annular tube, the cylindrical rod 13, through the first rectangular bar 142, drives the first rectangular cylinder 141 to move. The first rectangular cylinder 141 then drives the first L-shaped rod 14 to move. When the L-shaped rod 14 moves, it causes the second rectangular bar 1451 to slide in the middle of the ring 15. The first L-shaped rod 14 causes the straight pipe clamped in the middle of the clamping block 144 to move, so that the clamping block 144 is always located at the upper end of the ring pipe. When the cylindrical rod 13 is adjusted according to the ring pipe of different sizes, it also drives the clamping block 144 to be adjusted, so that the straight pipe clamped by the clamping block 144 can always be located at the upper end of the ring pipe. Then, the electric telescopic rod 152 is driven to retract, causing the ring 15 to slide downward. The ring 15 drives the second L-shaped rod 145 to slide downward in the second rectangular hole 1411 through the second rectangular bar 1451. The second L-shaped rod 145 drives the clamping block 144 to slide downward through the first L-shaped rod 14, causing the straight pipe clamped in the middle of the clamping block 144 to move downward and splice with the ring pipe. Subsequently, by driving the bidirectional lead screw 165 to rotate, the first rectangular blocks 164 on both sides slide on the upper end of the rectangular plate 3. The first rectangular blocks 164 drive the two third rectangular strips 16 to move closer to each other, and the third rectangular strips 16 drive the U-shaped blocks 167 to move closer to each other, thereby adjusting the distance between the two straight tubes placed on the upper end of the U-shaped blocks 167. By driving the second rectangular cylinder 162 to rotate between the support rods 163, the second rectangular cylinder 162 drives the fourth rectangular strips 161 on both sides to rotate. At the same time as the rotation, the fourth rectangular strips 161 slide into the second rectangular cylinder 162, and the fourth rectangular strips 161 on one side slide into the second rectangular cylinder 162. The rectangular bar 161 drives the upper third rectangular bar 16 to slide upward, while the fourth rectangular bar 161 on the other side drives the third rectangular bar 16 to slide downward. This causes the third rectangular bars 16 on both sides to tilt the upper U-shaped block 167, allowing the straight pipe to be placed tilted on the upper end of the U-shaped block 167. The tilted straight pipe on the upper end of the U-shaped block 167 is then spliced ​​onto the upper end of the straight pipe on the upper end of the circular pipe. After the splicing is completed, the welding robot arm 2 welds the joints of each pipe without the need for manual splicing, reducing errors during splicing and maintaining stability during welding.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic bracket welding positioning device, characterized in that: The system includes a workbench (1), with cylindrical rods (13) slidably arranged at the four corners of the upper end of the workbench (1). First L-shaped rods (14) are slidably arranged above the workbench (1) corresponding to the positions of each cylindrical rod (13). Each first L-shaped rod (14) has a clamping assembly at its upper end. The clamping assembly includes two clamping blocks (144) rotatably arranged at one end of the first L-shaped rod (14). A welding robot arm (2) is arranged on one side of the workbench (1). A support assembly is arranged at the upper end of the workbench (1). The support assembly includes a set of third rectangular bars (16) slidably arranged on both sides of the workbench (1). Each set of third rectangular bars (16) includes two third rectangular bars (16). The third rectangular bars (16) in the same set slide synchronously. U-shaped blocks (167) are rotatably arranged at the upper end of each third rectangular bar (16).

2. The photovoltaic bracket welding positioning device according to claim 1, characterized in that: The upper end of the workbench (1) is fixedly connected to a first circular plate (11) by a connecting block (17). The four corners of the middle part of the first circular plate (11) are respectively provided with first rectangular holes (111). The cylindrical rod (13) is slidably disposed in the first rectangular holes (111) by a rectangular slider (131).

3. The photovoltaic bracket welding positioning device according to claim 2, characterized in that: A second circular plate (12) is rotatably disposed between the workbench (1) and the first circular plate (11). The second circular plate (12) has arc-shaped holes (121) respectively at the positions corresponding to the first rectangular hole (111). The lower end of the rectangular slider (131) is fixedly connected to the first rectangular strip (142). Each of the first rectangular strips (142) is slidably disposed in the arc-shaped hole (121) through a cylindrical block (143) on the lower side of one end.

4. The photovoltaic bracket welding positioning device according to claim 3, characterized in that: The first rectangular bar (142) is fixed to the upper side of the end away from the cylindrical block (143) with a first rectangular tube (141), and the first L-shaped rod (14) is slidably disposed inside the first rectangular tube (141).

5. A photovoltaic bracket welding positioning device according to claim 4, characterized in that: The first rectangular tube (141) has a second rectangular hole (1411) on one side. The lower end of the first L-shaped rod (14) is rotatably provided with a second L-shaped rod (145). The second L-shaped rod (145) is slidably disposed inside the first rectangular tube (141) through the second rectangular hole (1411). A second rectangular strip (1451) is fixedly connected to one side of the second L-shaped rod (145). A ring (15) is slidably disposed on the outer side of each of the first L-shaped rods (14). Each of the second rectangular strips (1451) slides through the middle of the ring (15).

6. The photovoltaic bracket welding positioning device according to claim 5, characterized in that: The workbench (1) is fixed to a rectangular plate (3) at its lower end. The lower ends of the two sides of the ring (15) are fixed to the upper end of the rectangular plate (3) via an electric telescopic rod (152). The ring (15) is fixed to the two sides of the third rectangular strip (16) with a shaped plate (151) respectively. The shaped plate (151) has a third rectangular hole (1511) in the middle. The third rectangular strip (16) is slidably disposed inside the third rectangular hole (1511).

7. A photovoltaic bracket welding positioning device according to claim 6, characterized in that: The rectangular plate (3) has a fourth rectangular hole (31) on each side corresponding to the position of the two sets of third rectangular strips (16). The third rectangular strips (16) are slidably disposed inside the rectangular slider (131).

8. A photovoltaic bracket welding positioning device according to claim 7, characterized in that: The upper sides of the fourth rectangular hole (31) are respectively slidably provided with first rectangular blocks (164), and the third rectangular strip (16) is slidably provided in the first rectangular block (164). The two first rectangular blocks (164) are threadedly connected to a bidirectional screw (165) in the middle. The two ends of the bidirectional screw (165) are rotatably provided on the upper end of the rectangular plate (3) through the second rectangular block (166).

9. A photovoltaic bracket welding positioning device according to claim 8, characterized in that: The rectangular plate (3) has a first base plate (33) fixed to its four lower corners by support legs (32). A second base plate (34) is provided at the lower end of the first base plate (33). The first base plate (33) is rotatably mounted on the upper end of the second base plate (34).

10. A photovoltaic bracket welding positioning device according to claim 9, characterized in that: The lower end of the third rectangular bar (16) is respectively rotatably provided with a fourth rectangular bar (161), and the upper ends of the rectangular plate (3) are respectively rotatably provided with a second rectangular tube (162) through a support rod (163). The ends of the two fourth rectangular bars (161) are slidably provided inside the two ends of the second rectangular tube (162).

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