Flange welding device for extra-high voltage steel tube tower

Abstract

The utility model discloses a flange welding device for an extra-high voltage steel tube tower, which comprises a machine base, a rotating mechanism and a pressing mechanism, the rotating mechanism comprises a rotating disc which is arranged on the machine base and is driven by a driving device to rotate along a vertical axis, and the rotating disc is provided with a positioning mechanism matched with a flange. The positioning mechanism makes contact with the flange in multiple directions so that the flange can be placed at the fixed position of the rotary disc and rotate along with the rotary disc, the pressing mechanism comprises a lifting device arranged on the machine base and a pressing disc assembly which is driven by the lifting device to ascend and descend and connected to the bottom of the lifting device in a rotating mode, and the pressing disc assembly is located above the rotary disc. And the rotating disc and the rotating disc are distributed coaxially. The utility model provides the flange welding device for the extra-high voltage steel tube tower, which is convenient for positioning and welding the steel tube and the flange.

Description

Technical Field

[0001] This utility model relates to a flange welding device for ultra-high voltage steel pipe towers, belonging to the technical field of workpiece positioning welding equipment. Background Technology

[0002] Ultra-high voltage steel pipe towers refer to structural towers used to support ultra-high voltage transmission lines. They are generally made of welded steel pipes and have strong wind and earthquake resistance as well as good electrical conductivity. During the production of ultra-high voltage steel pipe towers, flanges need to be welded to the ends of some steel pipes used for power transmission. However, existing welding equipment does not have the ability to perform this type of circumferential welding, which reduces the welding speed and quality. Therefore, a device that can easily perform this welding function is needed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a flange welding device for ultra-high voltage steel pipe towers, which can conveniently realize the positioning welding of steel pipes and flanges and overcome the shortcomings of the prior art.

[0004] The technical solution of this utility model is: a flange welding device for ultra-high voltage steel pipe towers, including a base, a rotating mechanism and a pressing mechanism. The rotating mechanism includes a turntable mounted on the base and driven by a driving device to rotate along a vertical axis. The turntable is provided with a positioning mechanism that cooperates with the flange. The positioning mechanism contacts the flange in multiple directions, placing the flange at a fixed position on the turntable and rotating it together with the turntable. The pressing mechanism includes a lifting device mounted on the base and a pressure plate assembly driven by the lifting device to be lifted and connected to the bottom of the lifting device. The pressure plate assembly is located above the turntable and is distributed along the same axis as the turntable.

[0005] Furthermore, the positioning mechanism includes a boss located on the turntable that mates with the center hole of the flange, and several positioning pins that mate with the bolt holes of the flange.

[0006] Furthermore, the turntable is provided with a sliding hole that slides in conjunction with the positioning post. An elastic element is provided in the sliding hole, and the positioning post moves in and out of the sliding hole through the action of the elastic element to engage with the bolt hole located on the flange.

[0007] Furthermore, the aforementioned boss is in the shape of a frustum, smaller at the top and larger at the bottom.

[0008] Furthermore, the lifting device includes a frame mounted on a base, a lifter mounted on the frame, and a mounting plate installed at the bottom of the lifter. The frame includes vertically arranged guide columns, and the mounting plate is slidably connected to the guide columns.

[0009] Furthermore, the pressure plate assembly includes a fixing ring and a pressure plate. The fixing ring is fixedly installed on the bottom of the mounting plate by several circumferentially distributed connectors. The pressure plate is rotatably connected to the fixing ring by a bearing. The bottom of the pressure plate has a limiting cavity that mates with the top of the steel pipe.

[0010] By implementing this utility model, a multi-axis robotic arm equipped with a welding torch is set up next to the machine base. The flange is placed at a fixed position on the turntable through a positioning mechanism. After the lower end of the steel pipe is inserted and connected to the flange, the lifting device presses down the pressure plate assembly on the steel pipe to press the steel pipe and the flange together. The welding torch is moved by the robotic arm to weld at the connection between the steel pipe and the flange. The driving device drives the turntable to rotate, and the flange, steel pipe and pressure plate assembly rotate synchronously until the ring welding is completed. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present invention;

[0012] Figure 2 This is a perspective view of the present invention after the flange and steel pipe are placed;

[0013] Figure 3 This is a front view of the flange and steel pipe of this utility model.

[0014] The following components are shown in the figure: 1. Base; 2. Motor; 3. Turntable; 4. Flange; 5. Boss; 6. Positioning pin; 7. Sliding hole; 8. Spring; 9. Frame; 10. Lifter; 11. Mounting plate; 12. Guide pin; 13. Fixing ring; 14. Connecting rod; 15. Limiting cavity; 16. Pressure plate; 17. Steel pipe. Detailed Implementation

[0015] Embodiments of this utility model: such as Figures 1 to 3As shown, a flange welding device for ultra-high voltage steel pipe towers includes a base 1, comprising a rotating mechanism and a clamping mechanism. The rotating mechanism includes a motor 2 mounted on the base 1 and a turntable 3 mounted on the output shaft of the motor 2. The turntable 3 is driven by the motor 2 to rotate along a vertical axis. The turntable 3 is provided with a positioning mechanism that cooperates with a flange 4. The positioning mechanism includes a boss 5 located on the turntable 3 that is inserted into the central hole of the flange 4, and several positioning pins 6 that are inserted into the bolt holes of the flange 4. When the flange 4 is placed on the turntable 3, the central hole is inserted into the boss 5, and the bolt holes are inserted into the positioning pins 6, thus placing it in a fixed position on the turntable 3 and allowing it to rotate together with the turntable 3. The clamping mechanism... The system includes a lifting device mounted on the base 1 and a pressure plate assembly connected to the bottom of the lifting device via the lifting device. After the flange 4 is placed, the steel pipe 17 to be welded to the flange 4 is fitted onto the flange 4. The lifting device presses down the pressure plate assembly onto the steel pipe 17, pressing the steel pipe 17 and the flange 4 together. The welding torch moves to the connection between the steel pipe 17 and the flange 4 via the robotic arm to weld. The motor 2 drives the turntable 3 to rotate, and the flange 4, steel pipe 17, and pressure plate assembly rotate synchronously until the annular welding is completed. After that, the lifting device drives the pressure plate assembly to rise and separate from the steel pipe 17, and the welded steel pipe 17 is removed from the flange 4, which facilitates the positioning and annular welding of the steel pipe 17 and the flange 4.

[0016] As a preferred embodiment, the turntable 3 is provided with a sliding hole 7 that slides into the positioning post 6. A spring 8 is provided inside the sliding hole 7. The spring 8 is the elastic element mentioned above. The spring 8 contacts the bottom of the positioning post 6. When there is no external force, the upper end of the positioning post 6 extends beyond the sliding hole 7. When the flange 4 is fitted onto the boss 5, it is difficult to ensure that the positioning post 6 can also be aligned and inserted into the bolt hole. When it is not aligned, the positioning post 6 is completely pressed into the sliding hole 7. At this time, the spring 8 is further compressed. When the flange 4 is rotated, when the bolt hole on the flange 4 is aligned with the sliding hole 7, the spring 8 pushes the positioning post 6 upward so that the upper end of the positioning post 6 is inserted into the bolt hole, thereby limiting the turntable 3 and allowing the flange 4 to rotate together with the turntable 3.

[0017] As a preferred option, the boss 5 is a frustum-shaped structure with a smaller top and a larger bottom, which serves as a guide and facilitates connection with the flange 4.

[0018] The further lifting device includes a frame 9 mounted on the base 1, a lifter 10 mounted on the frame 9, and a mounting plate 11 installed at the bottom of the lifter 10. The lifter 10 can be a hydraulic cylinder, a pneumatic cylinder, etc. The frame 3 includes vertically arranged guide columns 12. The mounting plate 11 slides on the guide columns 12 and moves up and down through the lifter 10 to ensure stability. The pressure plate assembly includes a fixing ring 13 and a pressure plate 1. The fixing ring 13 is fixed by four circumferentially distributed connecting rods 14. The pressure plate 1 is fixedly installed at the bottom of the mounting plate 11. The pressure plate 1 is connected to the fixing ring 13 through the bearing, and the downward pressure force is evenly distributed on the pressure plate 16 along the circumference. The force is even and it is conducive to the pressure plate 16 pressing the flange 4 along the circumference of the steel pipe 17. The bottom of the pressure plate 1 has a limiting cavity 15 that matches the top of the steel pipe 17. When the pressure plate 16 presses down on the steel pipe 17, the steel pipe 17 enters the limiting cavity 15, realizing the accurate limiting of the steel pipe 17 and ensuring that the steel pipe 17 is vertically set and connected to the flange 4.

Claims

1. A flange welding device for ultra-high voltage steel pipe towers, comprising a base, characterized in that: The device includes a rotating mechanism and a pressing mechanism. The rotating mechanism includes a turntable mounted on a base and driven by a drive device to rotate along a vertical axis. The turntable has a positioning mechanism that mates with a flange. The positioning mechanism contacts the flange in multiple directions, placing the flange at a fixed position on the turntable and rotating it together with the turntable. The pressing mechanism includes a lifting device mounted on the base and a pressure plate assembly driven by the lifting device to be raised and lowered at the bottom of the lifting device. The pressure plate assembly is located above the turntable and is distributed along the same axis as the turntable. The positioning mechanism includes a boss on the turntable that mates with the center hole of the flange and several positioning pins that mate with the bolt holes of the flange. The turntable has sliding holes that slidably engage with the positioning pins. An elastic element is provided in the sliding hole, and the positioning pins move in and out of the sliding hole through the elastic element to mate with the bolt holes of the flange.

2. The flange welding device for ultra-high voltage steel pipe towers according to claim 1, characterized in that: The boss is shaped like a frustum, smaller at the top and larger at the bottom.

3. The flange welding device for ultra-high voltage steel pipe towers according to claim 1, characterized in that: The lifting device includes a frame mounted on a base, a lifter mounted on the frame, and a mounting plate installed at the bottom of the lifter. The frame includes vertically arranged guide columns, and the mounting plate is slidably connected to the guide columns.

4. The flange welding device for ultra-high voltage steel pipe towers according to claim 3, characterized in that: The pressure plate assembly includes a fixing ring and a pressure plate. The fixing ring is fixedly installed on the bottom of the mounting plate by several connecting pieces distributed along the circumference. The pressure plate is rotatably connected to the fixing ring by a bearing. The bottom of the pressure plate has a limiting cavity that mates with the top of the steel pipe.

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