A hydraulic drive-based automatic centering device for ultra-high voltage tower splicing and welding

Abstract

The present application relates to the field of high-voltage tower welding, in particular to a super-high-voltage tower tailor-welding automatic centering device based on hydraulic drive, comprising a driving base and a welding mechanical arm, the driving base is rotatably connected with a supporting cross plate, a plurality of uniformly arranged positioning blocks are slidably connected to the supporting cross plate, a hydraulic rod connected with the positioning blocks is installed on the supporting cross plate, and a right-angle groove is formed on the position of the positioning blocks close to the center of the supporting cross plate. The present application drives the plurality of positioning blocks to move and abut against the middle positioning block for movement adjustment, after the positioning blocks abut against the base plate and are positioned, the telescopic rod pushes the locking block to move downward to abut against the lower base plate through the transmission assembly, the base plate is fixed through the extrusion of the locking block, so that the lower base plate can smoothly produce thermal expansion during welding, the base plate will not produce thermal deformation, and the welding quality during super-high-voltage tower tailor-welding is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of high-voltage tower welding, specifically to an automatic centering device for welding ultra-high-voltage towers based on hydraulic drive. Background Technology

[0002] Welding of ultra-high voltage (UHV) transmission towers is a crucial step in power transmission projects, involving the welding process and quality control of high-strength steel. The base welding is particularly critical for ensuring the overall structural stability and load-bearing capacity. The base typically consists of thick plates, flanges, and stiffening ribs. The welding process requires strict control over deformation, residual stress, and weld quality. Therefore, most factories use welding robots to weld the bases. However, because welding robots require programming to determine the origin of the welding position, operators must confirm the origin before each weld. This confirmation introduces errors, affecting both welding efficiency and quality. To address this issue, patent application CN119368975A provides a method for welding ultra-high voltage (UHV) transmission towers. The automatic welding device for tower anchor bolt assemblies uses a guide plate that moves towards the workpiece, causing a straightening plate to move closer to the workpiece. This straightening plate corrects the workpiece's position, preventing it from shifting during placement and ensuring centering. This ensures the welding robot's welding origin is in a fixed position for each welding operation. However, it's important to note that while centering and fixing the workpiece involves pushing it with baffles or positioning blocks, the drive equipment needs to continue applying force to secure it after centering. The high temperature generated by the welding torch during welding causes thermal expansion of the workpiece, and the multiple positioning blocks around the workpiece constantly press against it, leading to deformation during welding and reducing the welding quality of the UHV tower assembly.

[0003] To address this, an automatic centering device for welding ultra-high voltage transmission towers based on hydraulic drive is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic centering device for welding ultra-high voltage iron towers based on hydraulic drive, so as to solve the problem that the origin confirmation every time affects the welding efficiency, and at the same time solve the problem that thermal expansion during welding causes the workpiece to deform during welding, which reduces the welding quality of ultra-high voltage iron towers.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An automatic centering device for welding ultra-high voltage transmission towers based on hydraulic drive includes a drive base and a welding robotic arm. A support cross plate is rotatably connected to the drive base, and multiple evenly arranged positioning blocks are slidably connected to the support cross plate. A hydraulic rod connected to the positioning blocks is installed on the support cross plate. A right-angle groove is formed on the positioning block near the center of the support cross plate. The inner walls of the two right-angle sides of the right-angle groove are inclined, with the inclination angle facing downward toward the steel plate to be welded. A telescopic rod is fixedly installed on the inner wall of the right-angle groove. The telescopic rod is located at 45° in the right-angle groove direction. A locking block is fixedly installed on the movable end of the telescopic rod. A first compression spring sleeved on the telescopic rod abuts between the locking block and the inner wall of the right-angle groove. A transmission component is installed on the positioning block. After the hydraulic rod pushes the positioning block to position the steel plate and keeps it in place, the transmission component pushes the locking block to compress the steel plate through the telescopic rod.

[0007] When welding the base of a high-voltage tower, because a robotic arm is used, the base plate to be welded needs to be fixed in a designated position. This requires fixing the base plate to the center of the support cross plate. A hydraulic rod pushes a positioning block to fix and position the base plate, ensuring it is in the designated location. Simultaneously, because the robotic arm is in one position, to ensure smooth welding, the base needs to be driven to rotate the support cross plate to the designated position for welding. Maintaining the fixation of the base plate during welding requires the hydraulic rod to continuously apply a certain force to push the positioning block against the base plate. The high temperature generated by the welding torch during welding also contributes to this process. This can cause the base plate to expand thermally, and the multiple positioning blocks around the base plate will always press against it, causing the base plate to deform during welding. Therefore, in this invention, after the positioning blocks are positioned against the base plate, the transmission component transmits the force applied to the positioning blocks to the telescopic rod above, causing the telescopic rod to push the locking block down and press against the base plate below. The locking block presses and fixes the base plate. The telescopic rod is located at 45° in the right-angle groove, which can better align with the diagonal of the lower iron plate for fixation, so that the lower base plate can expand thermally smoothly during welding, ensuring that the base plate will not deform due to heat and ensuring the welding quality during the splicing of the UHV tower.

[0008] Preferably, the transmission assembly includes a piston cylinder, and the positioning block has an installation hole. The piston cylinder slides within the installation hole. Two symmetrically arranged piston blocks are slidably connected inside the piston cylinder. Push rods are fixedly installed on both sides of the piston blocks. One push rod extends outside the piston cylinder and abuts against the inner wall of the installation hole, while the other push rod extends outside the piston cylinder and is fixedly installed at the movable end of the hydraulic rod. A pressure relief valve communicating with its interior is installed on the piston cylinder. A pipe connected to the telescopic rod is installed on the pressure relief valve. A locking block is fixedly installed on the piston cylinder and is also slidably connected within the installation hole. A switch valve is installed on one of the locking blocks. The switch valve communicates with the piston cylinder, and a circular pipe is installed between the switch valve and the telescopic rod.

[0009] The hydraulic rod pushes the positioning block to move. After positioning is complete, the transmission assembly operates. Specifically, during positioning, the movable end of the hydraulic rod moves forward, pushing the push rod. Because the push rod is connected to the piston block, and the piston block is installed inside the piston cylinder, the movement of one push rod can drive the movement of the other push rod through the piston cylinder and piston block. The push rod pushes the positioning block to move. When the positioning block can no longer move, the hydraulic rod continues to push the piston block, causing the liquid in the piston cylinder to be discharged through the pressure relief valve and enter the telescopic rod through a pipe on one side, pushing the telescopic rod to extend, causing the locking block to press against the lower iron plate, and simultaneously stretching the first compression spring. Of course, when it is necessary to remove the iron plate, the hydraulic... The rod drives the piston block backward via the push rod. Since the piston cylinder cannot extract liquid, it can only move the piston cylinder. When the piston cylinder moves to the set position, the locking block on the piston cylinder abuts against the inner wall of the mounting hole on one side. The switch valve is installed on the locking block, causing the switch valve to open, allowing the liquid in the telescopic rod to be pushed into the piston cylinder. This causes the first compression spring on the telescopic rod to push the movable end of the telescopic rod to retract. At the same time, because the liquid re-enters the piston cylinder, the push rod on the other side is pushed out, ready to push the positioning block to move next. This causes the telescopic rod to push the locking block against the bottom plate below. The locking block's compression fixes the bottom plate, preventing thermal deformation and ensuring the welding quality during the splicing of the UHV tower.

[0010] Preferably, the piston cylinder is filled with hydraulic oil, and two piston rings are fixedly installed inside the piston cylinder. The piston rings are located in the middle of the piston cylinder, and the two piston rings are equidistant from the nearest end of the piston cylinder. The connection between the pressure relief valve and the switching valve and the piston cylinder is located between the two piston rings.

[0011] Hydraulic oil allows the fluid inside the piston cylinder to withstand greater pressure, enabling the hydraulic rod to smoothly move the piston block via the push rod. Two piston rings are fixedly installed inside the piston cylinder, and the piston block is limited by two pistons fixed inside the piston cylinder to prevent the piston block from overstepping its position. This would cause the connection points of the pressure relief valve and the switching valve to be located on the side of the piston block closer to the piston rod. It ensures that the connection points of the pressure relief valve and the switching valve to the piston cylinder are located in the middle position between the two piston blocks. After the hydraulic rod pushes the positioning block against the base plate for positioning, the hydraulic rod continues to push the piston cylinder to the designated position, which can then push the locking block to move downward. The locking block's compression fixes the base plate, preventing thermal deformation of the base plate and ensuring the welding quality during the splicing of the UHV tower.

[0012] Preferably, the locking block has a triangular structure, and the bottom of the locking block has multiple protrusions. The multiple protrusions are evenly arranged and parallel to one side of the locking block near the right-angle groove. The protrusions are inclined and the inclination angle is towards one side of the right-angle groove.

[0013] The triangular locking block can cover the corner of the base plate that the positioning block abuts to the maximum extent. The locking block presses against the base plate, and the multiple protrusions at the bottom of the locking block can increase the friction between the locking block and the base plate. The multiple protrusions are evenly arranged and parallel to one side of the locking block near the right angle groove, which increases the friction generated when the base plate moves to the side. At the same time, the protrusions are set at an angle, and the angle is towards one side of the right angle groove, so that when the base plate expands due to high temperature, it can expand smoothly and avoid thermal deformation of the base plate, thus ensuring the welding quality during the splicing of the UHV tower.

[0014] Preferably, the support cross plate has multiple holes, a circular plate is slidably connected in the holes, a ball bearing is rolled on the circular plate, and a second compression spring disposed in the holes is abutted between the bottom of the circular plate and the bottom wall of the holes.

[0015] Because the positioning block needs to push the base plate to move and rotate it when it abuts against the base plate, ball bearings are needed to support the base plate and allow it to rotate smoothly. It should be noted that in this invention, the locking block needs to press the base plate below. Using ball bearings would cause the base plate to deform downwards due to heat during welding. Therefore, when the locking block presses downwards, the base plate presses the ball bearings. Because the ball bearings roll on the circular plate, the pressed ball bearings push the circular plate below to move downwards. Since there is a second compression spring under the circular plate, the second compression spring is compressed. When the locking block moves away from the base plate below, the compressed second compression spring pushes the circular plate and ball bearings back to their original positions, so that the base plate can be fixed and aligned normally, indirectly ensuring the welding quality during the splicing of UHV towers.

[0016] Preferably, a push plate is fixedly installed on one side of the positioning block. The push plate is located below the right-angle groove and slides on the support cross plate, abutting against the inner wall of the support cross plate. The push plate has a triangular cross section. By using the push plate, dirt in the groove of the support cross plate can be cleaned, preventing dirt from affecting the movement of the positioning block and its positioning on the base plate. At the same time, the triangular cross section of the push plate can effectively push the cleaned dirt out of the groove, indirectly ensuring the welding quality during the splicing of ultra-high voltage towers.

[0017] Preferably, both the locking block and the push plate are made of cast metal steel, and are symmetrically arranged vertically. The push plate cooperates with the upper locking block to more firmly clamp the middle base plate, ensuring that the base plate can be fixed in the middle position of the supporting cross plate, thereby indirectly ensuring the welding quality during the splicing of the UHV tower.

[0018] Preferably, the mounting hole is provided with two long plates, which are rotatably connected to each other. One of the long plates is rotatably connected to the mounting hole, and the other long plate is rotatably connected to the locking block. A buckle is installed in the middle of the two long plates, and the pipe and the round pipe are both installed on the buckle.

[0019] It is important to note that the movement of the piston cylinder requires the simultaneous movement of the pipes and round tubes connected to it. Prolonged following movement can easily cause the pipes and round tubes to become stuck in the grooves of the mounting holes. Therefore, using two rotating, connected long plates allows the piston cylinder to move forward, pushing the two long plates together and using a latch to lift the pipes and round tubes away from the lower slide rail. Conversely, when the piston cylinder moves backward, it pushes the two long plates apart and uses a latch to lower the pipes and round tubes closer to the lower slide rail. These two long plates ensure the stable operation of the transmission components, allowing the locking block to precisely press against the base plate below, thus guaranteeing the welding quality during the splicing of ultra-high voltage towers.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The hydraulic rod pushes multiple positioning blocks to move and abut against the middle positioning block for adjustment. After the positioning block is positioned against the base plate, the telescopic rod is pushed down by the transmission component to abut against the lower base plate. The pressing of the locking block fixes the base plate, allowing the lower base plate to generate thermal expansion smoothly during welding, ensuring that the base plate will not deform due to heat, and ensuring the welding quality during the splicing of the UHV tower.

[0022] 2. The multiple protrusions at the bottom of the locking block increase the friction between the locking block and the base plate. The multiple protrusions are evenly arranged and parallel to one side of the locking block near the right-angle groove, which increases the friction generated when the base plate moves to the side. At the same time, the protrusions are set at an angle, with the angle facing one side of the right-angle groove, so that the base plate can expand smoothly when it is thermally expanded due to high temperature, avoiding thermal deformation of the base plate and ensuring the welding quality during the splicing of the UHV tower.

[0023] 3. In this invention, the locking block needs to press the bottom plate below. Using ball bearings would cause the bottom plate to deform downwards due to heat during welding. Therefore, when the locking block presses downwards, the bottom plate presses the ball bearings to push the lower circular plate downwards, and the second compression spring is compressed. When the locking block moves away from the bottom plate below, the compressed second compression spring pushes the circular plate and ball bearings back to their original positions, so that the bottom plate can be fixed and aligned normally, indirectly ensuring the welding quality during the splicing of UHV towers. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the supporting cross plate in this invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the positioning block in this invention;

[0027] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0028] Figure 5 This is a three-dimensional structural diagram of the locking block in this invention;

[0029] Figure 6 This is a schematic diagram of the pressing structure of the locking block in this invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of the hole in this invention.

[0031] In the diagram: 1. Drive base; 2. Support cross plate; 3. Positioning block; 4. Ball bearing; 5. Hydraulic rod; 6. Locking block; 7. First compression spring; 8. Telescopic rod; 9. Piston cylinder; 10. Push plate; 11. Mounting hole; 12. Push rod; 13. Piston block; 14. Piston ring; 15. Clamping block; 16. Pressure relief valve; 17. Switch valve; 18. Round tube; 19. Pipeline; 20. Long plate; 21. Buckle; 22. Protrusion; 23. Round plate; 24. Hole; 25. Second compression spring; 26. Right-angle groove; 27. Welding robotic arm. Detailed Implementation

[0032] Please see Figures 1 to 7 This invention provides an automatic centering device for welding ultra-high voltage transmission towers based on hydraulic drive, the technical solution of which is as follows:

[0033] Please refer to the following: An automatic centering device for welding ultra-high voltage transmission towers based on hydraulic drive. Figure 1 , Figure 2 and Figure 5 The system includes a drive base 1 and a welding robotic arm 27. A support cross plate 2 is rotatably connected to the drive base 1. Multiple evenly arranged positioning blocks 3 are slidably connected to the support cross plate 2. A hydraulic rod 5 connected to the positioning blocks 3 is installed on the support cross plate 2. The positioning blocks 3 are characterized by having a right-angle groove 26 near the center of the support cross plate 2. The inner walls of the right-angle sides of the right-angle groove 26 are inclined, with the inclination angle facing the steel plate to be welded downwards. A telescopic rod 8 is fixedly installed on the inner wall of the right-angle groove 26. The telescopic rod 8 is located at 45° in the right-angle groove 26. A locking block 6 is fixedly installed on the movable end of the telescopic rod 8. The locking block 6 is triangular in structure. Multiple protrusions 22 are provided at the bottom of the locking block 6. The multiple protrusions 22 are evenly arranged and parallel to one side of the locking block 6 near the right-angle groove 26. The protrusions 22 are inclined, with the inclination angle facing one side of the right-angle groove 26. A first compression spring 7, sleeved on the telescopic rod 8, abuts against the inner wall of the right-angle groove 26 between the locking block 6 and the right-angle groove 26. A transmission component is installed on the positioning block 3. After the hydraulic rod 5 pushes the positioning block 3 to position the steel plate, it remains in its original position. The transmission component pushes the locking block 6 to squeeze the steel plate through the telescopic rod 8.

[0034] Please see Figure 2 , Figure 3 and Figure 4 The transmission assembly includes a piston cylinder 9. A mounting hole 11 is provided on the positioning block 3. The piston cylinder 9 slides in the mounting hole 11. Two symmetrically arranged piston blocks 13 are slidably connected inside the piston cylinder 9. Push rods 12 are fixedly installed on both piston blocks 13. One push rod 12 extends to the outside of the piston cylinder 9 and abuts against the inner wall of the mounting hole 11. The other push rod 12 extends to the outside of the piston cylinder 9 and is fixedly installed at the movable end of the hydraulic rod 5. A pressure relief valve 16 communicating with its interior is installed on the piston cylinder 9. A pipe 19 connected to the telescopic rod 8 is installed on the pressure relief valve 16. A locking block 15 is fixedly installed on the piston cylinder 9 and is also slidably connected in the mounting hole 11. The piston cylinder 9 is filled with hydraulic oil. Two piston rings 14 are fixedly installed inside the piston cylinder 9. The piston rings 14 are located in the middle of the piston cylinder 9. The two piston rings 14 are equidistant from the nearest end of the piston cylinder 9. The connection between the pressure relief valve 16 and the switching valve 17 and the piston cylinder 9 is located between the two piston rings 14. One of the locking blocks 15 is equipped with a switch valve 17, which is connected to the piston cylinder 9. A round pipe 18 is installed between the switch valve 17 and the telescopic rod 8.

[0035] Please see Figure 1 , Figure 6 and Figure 7 The support cross plate 2 has multiple holes 24, and a circular plate 23 is slidably connected inside the holes 24. A ball bearing 4 is rolled on the circular plate 23. A second compression spring 25 is provided inside the holes 24 and abuts against the bottom of the circular plate 23 and the bottom wall of the holes 24.

[0036] Please see Figure 1 and Figure 2 A push plate 10 is fixedly installed on one side of the positioning block 3. The push plate 10 is located below the right-angle groove 26. The push plate 10 slides on the support cross plate 2 and abuts against the inner wall of the support cross plate 2. The cross section of the push plate 10 is triangular. Both the locking block 6 and the push plate 10 are made of cast metal steel and are arranged symmetrically at the top and bottom.

[0037] Please see Figure 3 and Figure 4 The mounting hole 11 contains two long plates 20, which are rotatably connected to each other. One long plate 20 is rotatably connected to the mounting hole 11, and the other long plate 20 is rotatably connected to the locking block 15. A buckle 21 is installed in the middle of the two long plates 20. The pipe 19 and the round pipe 18 are both installed on the buckle 21.

[0038] Please see Figure 2 , Figure 3 and Figure 4 In actual operation, a crane is used to place the welded iron plate onto the support cross plate 2, and the position of the base plate is adjusted by the ball bearings 4 installed on the support cross plate 2. At the same time, when the positioning block 3 abuts against the base plate and positions the base plate, the base plate needs to be pushed to move and rotate. During positioning, the movable end of the hydraulic rod 5 will move forward, and the moving movable end will push the push rod 12 to move. Because the push rod 12 is connected to the piston block 13, and the piston block 13 is installed in the piston cylinder 9, when the push rod 12 on one side moves, it can drive the push rod 12 on the other side to move through the piston cylinder 9 and the piston block 13. The push rod 12 pushes the positioning block 3 to move, thereby positioning the base plate in the middle.

[0039] Please see Figure 2 , Figure 4 and Figure 6When the positioning block 3 cannot move, the hydraulic rod 5 continues to push the piston block 13 to move, so that the liquid in the piston cylinder 9 will be discharged through the pressure relief valve 16 and enter the telescopic rod 8 through the pipe 19 on one side, pushing the telescopic rod 8 to extend, so that the locking block 6 abuts against the iron plate below. The hydraulic oil allows the liquid in the piston cylinder 9 to withstand greater pressure, so that the hydraulic rod 5 can smoothly push the piston block 13 to move through the push rod 12. Two piston rings 14 are fixedly installed in the piston cylinder 9. The piston block 13 is limited by the two pistons fixed in the piston cylinder 9 to prevent the piston block 13 from overstepping and causing the connection between the pressure relief valve 16 and the switch valve 17 and the piston cylinder 9 to be located on the side of the piston block 13 closer to the piston rod. This ensures that the connection between the pressure relief valve 16 and the switch valve 17 and the piston cylinder 9 is located in the middle position of the two piston blocks 13. This ensures that after the hydraulic rod 5 pushes the positioning block 3 to abut against the bottom plate for positioning, the hydraulic rod 5 continues to push the piston cylinder 9 to the designated position and can push the locking block 6 to move down.

[0040] Please see Figure 2 and Figure 5 The locking block 6, with its triangular structure, can cover one corner of the base plate that is pressed against by the positioning block 3 to the maximum extent. The locking block 6 presses against the base plate, and the multiple protrusions 22 at the bottom of the locking block 6 can increase the friction between the locking block 6 and the base plate. The multiple protrusions 22 are evenly arranged and parallel to one side of the locking block 6 near the right angle groove 26, which increases the friction generated when the base plate moves to the side. At the same time, the protrusions 22 are inclined and the inclination angle is towards one side of the right angle groove 26, so that when the base plate expands due to high temperature, it can expand smoothly and avoid thermal deformation of the base plate.

[0041] Please see Figure 1 , Figure 2 and Figure 7 When the locking block 6 is pressed downward, the ball 4 is pressed by the bottom plate. Because the ball 4 rolls on the circular plate 23, the pressed ball 4 pushes the circular plate 23 below to move downward. Because there is a second compression spring 25 under the circular plate 23, the second compression spring 25 is compressed. When the locking block 6 moves away from the bottom plate below, the compressed second compression spring 25 pushes the circular plate 23 and the ball 4 back to their original positions, so that the bottom plate can be fixed and aligned normally.

[0042] Please see Figure 2 The movable push plate 10 can clean the dirt in the groove of the supporting cross plate 2, preventing the dirt from affecting the movement of the positioning block 3 and affecting the positioning of the positioning block 3 on the base plate. At the same time, the cross section of the push plate 10 is triangular, which can effectively push the cleaned dirt out of the groove. In addition, the push plate 10 cooperates with the locking block 6 above to firmly clamp the base plate in the middle, ensuring that the base plate can be fixed in the middle position of the supporting cross plate 2, indirectly ensuring the welding quality during the splicing of the UHV tower.

[0043] Please see Figure 2 , Figure 3 and Figure 4 The movement of piston cylinder 9 requires the simultaneous movement of pipe 19 and round pipe 18 connected to it. Long-term following movement can easily cause pipe 19 and round pipe 18 to get stuck in the groove of mounting hole 11. Therefore, using two rotating long plates 20 can push the two long plates 20 to close together when piston cylinder 9 moves forward, and drive pipe 19 and round pipe 18 to rise away from the slide rail below through buckle 21.

[0044] Please see Figure 3 , Figure 4 and Figure 6 When the iron plate needs to be removed, the hydraulic rod 5 drives the piston block 13 to move backward through the push rod 12. Since the piston cylinder 9 cannot extract liquid, it can only move the piston cylinder 9. When the piston cylinder 9 moves to the set position, the locking block 15 on the piston cylinder 9 abuts against the inner wall of the mounting hole 11 on one side. The switch valve 17 is installed on the locking block 15, causing the switch valve 17 to be opened, allowing the liquid in the telescopic rod 8 to be pushed into the piston cylinder 9. This causes the first compression spring 7 on the telescopic rod 8 to push the movable end of the telescopic rod 8 to retract. At the same time, because the liquid re-enters the piston cylinder 9, the push rod 12 on the other side is pushed out, ready to push the positioning block 3 to move next time. The piston cylinder 9 moves backward, pushing the two long plates 20 to unfold each other, and through the buckle 21, it drives the pipe 19 and the round pipe 18 to descend close to the slide rail below. The two long plates 20 ensure the stable operation of the transmission component.

[0045] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. An automatic centering device for welding ultra-high voltage iron towers based on hydraulic drive, comprising a drive base (1) and a welding robotic arm (27), wherein a support cross plate (2) is rotatably connected to the drive base (1), and a plurality of evenly arranged positioning blocks (3) are slidably connected to the support cross plate (2), and a hydraulic rod (5) connected to the positioning blocks (3) is installed on the support cross plate (2), characterized in that, The positioning block (3) has a right-angle groove (26) near the center of the supporting cross plate (2). The inner walls of the right-angle sides of the right-angle groove (26) are inclined, and the inclination angle faces the steel plate to be welded downwards. A telescopic rod (8) is fixedly installed on the inner wall of the right-angle groove (26). The telescopic rod (8) is located at 45° in the right-angle groove (26). A locking block (6) is fixedly installed on the movable end of the telescopic rod (8). The locking block (6) abuts against the inner wall of the right-angle groove (26) and is sleeved on the telescopic rod. (8) The first compression spring (7) on the positioning block (3) is equipped with a transmission assembly, which includes a piston cylinder (9). The positioning block (3) has an installation hole (11). The piston cylinder (9) slides in the installation hole (11). Two symmetrically arranged piston blocks (13) are slidably connected inside the piston cylinder (9). Push rods (12) are fixedly installed on both sides of the piston blocks (13). One push rod (12) extends to the outside of the piston cylinder (9) and abuts against the inner wall of the installation hole (11). On the other side, the push rod (12) extends to the outside of the piston cylinder (9) and is fixedly installed at the movable end of the hydraulic rod (5). A pressure relief valve (16) communicating with the inside of the piston cylinder (9) is installed on the piston cylinder (9). A pipe (19) connected to the telescopic rod (8) is installed on the pressure relief valve (16). A locking block (15) is fixedly installed on the piston cylinder (9). The locking block (15) is also slidably connected in the mounting hole (11). A switch valve (17) is installed on one of the locking blocks (15). The switch valve (17) is connected to the piston cylinder (9). The piston cylinder (9) is connected, and a round tube (18) is installed between the switch valve (17) and the telescopic rod (8). The piston cylinder (9) is filled with hydraulic oil, and two piston rings (14) are fixedly installed inside the piston cylinder (9). The piston rings (14) are located in the middle of the piston cylinder (9), and the two piston rings (14) are equidistant from the nearest end of the piston cylinder (9). The connection between the pressure relief valve (16) and the switch valve (17) and the piston cylinder (9) is located between the two piston rings (14).

2. The automatic centering device for welding ultra-high voltage iron towers based on hydraulic drive according to claim 1, characterized in that, The locking block (6) is a triangular structure. The bottom of the locking block (6) is provided with multiple protrusions (22). The multiple protrusions (22) are evenly arranged and parallel to one side of the locking block (6) near the right angle groove (26). The protrusions (22) are set in an inclined position and the inclination angle is towards one side of the right angle groove (26).

3. The automatic centering device for welding ultra-high voltage iron towers based on hydraulic drive according to claim 1, characterized in that, The supporting cross plate (2) has multiple holes (24), and a circular plate (23) is slidably connected in the holes (24). A ball bearing (4) is rolled on the circular plate (23). A second compression spring (25) is provided in the holes (24) between the bottom of the circular plate (23) and the bottom wall of the holes (24).

4. The automatic centering device for welding ultra-high voltage iron towers based on hydraulic drive according to claim 3, characterized in that, A push plate (10) is fixedly installed on one side of the positioning block (3). The push plate (10) is located below the right angle groove (26). The push plate (10) slides on the support cross plate (2) and abuts against the inner wall of the support cross plate (2). The cross section of the push plate (10) is triangular.

5. The automatic centering device for welding ultra-high voltage iron towers based on hydraulic drive according to claim 4, characterized in that, The locking block (6) and the push plate (10) are both made of cast metal steel, and the locking block (6) and the push plate (10) are arranged symmetrically on the top and bottom.

6. The automatic centering device for welding ultra-high voltage iron towers based on hydraulic drive according to claim 1, characterized in that, Two long plates (20) are provided in the mounting hole (11). The two long plates (20) are rotatably connected to each other. One of the long plates (20) is rotatably connected to the mounting hole (11), and the other long plate (20) is rotatably connected to the locking block (15). A buckle (21) is installed in the middle of the two long plates (20). The pipe (19) and the round pipe (18) are both installed on the buckle (21).

Images