A power transmission line tower welded assembly

Abstract

This utility model provides a welding assembly for transmission line towers, belonging to the field of transmission line tower welding technology. The assembly includes: a welding support frame, a rotating positioning seat, a welding fixture, an adjustment mechanism, and a stabilizing device. The welding support frame includes a base plate and a column. The base plate is a rectangular steel plate structure, and the column is vertically fixed at the geometric center of the base plate. The rotating positioning seat is rotatably connected to the upper end of the column via a bearing assembly. The rotating positioning seat includes an annular seat body and radially extending arms. The inner diameter of the annular seat body matches the outer diameter of the column, and the radially extending arms are evenly distributed along the circumference of the annular seat body. The welding fixture is installed at the end of the radially extending arms and includes a clamping base and clamping claws. This invention solves the technical problems of inaccurate component positioning, unstable clamping, and difficulty in adjusting the welding angle during the welding process of transmission line towers in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of power transmission line tower welding technology, and specifically relates to a power transmission line tower welding assembly. Background Technology

[0002] As a crucial infrastructure for power transmission, the welding quality of transmission line towers directly impacts the safe and stable operation of the power system. With the rapid development of the State Grid, the requirements for tower welding quality are increasingly stringent. Traditional tower welding operations rely primarily on manual labor, with component positioning and clamping achieved mainly through simple clamps and supports. This method suffers from low positioning accuracy, unstable clamping, and difficulty in adjusting the welding angle. Existing welding clamps are mostly fixed designs, unable to adapt to welding requirements at different angles. Operators need to frequently adjust the workpiece position, reducing work efficiency and increasing labor intensity. Furthermore, the clamping... Force adjustment often relies on simple bolt tightening, which cannot achieve precise force control and is prone to component deformation or insecure clamping. During long-term operation, heat dissipation issues gradually become apparent, affecting the equipment's service life and operational stability. Existing support structures lack stability and are prone to vibration during welding, impacting weld quality. Furthermore, existing clamps are poorly adaptable to tower components with different cross-sectional shapes, requiring different clamps for different components, increasing equipment cost and operational complexity. Therefore, there is an urgent need for a transmission line tower welding assembly that can achieve precise positioning, stable clamping, and adjustable angles to improve welding quality and efficiency. Utility Model Content

[0003] In view of this, the present invention provides a welding assembly for transmission line towers, which can solve the technical problems of inaccurate component positioning, unstable clamping, and difficulty in adjusting the welding angle in the welding process of transmission line towers in the prior art.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a welding assembly for transmission line towers, comprising: a welding support frame, a rotating positioning seat, a welding fixture, an adjustment mechanism, and a stabilizing device; the welding support frame includes a base plate and a column, the base plate being a rectangular steel plate structure, and the column being vertically fixed at the geometric center of the base plate; the rotating positioning seat is rotatably connected to the upper end of the column via a bearing assembly, the rotating positioning seat including an annular seat body and radially extending arms, the inner diameter of the annular seat body matching the outer diameter of the column, and the radially extending arms being evenly distributed along the circumference of the annular seat body; the welding fixture is mounted on the radially extending arms... At the end of the extension arm, the welding fixture includes a clamping base and clamping claws. The clamping base is connected to the radial extension arm via a hinge shaft, and the clamping claws have an arc-shaped structure and are hinged to the clamping base. The adjustment mechanism includes a screw drive assembly and a drive handle. The screw of the screw drive assembly passes through the clamping base and is threaded to the rear end of the clamping claws. The drive handle is fixed to the outer end of the screw. The stabilizing device includes a support rod and a locking block. One end of the support rod is fixedly connected to the annular seat of the rotary positioning seat, and the other end is connected to the column via the locking block. The locking block is slidably adjustable along the axial direction of the column and has a locking function.

[0006] The technical advantages of the welding assembly for transmission line towers provided by this utility model are as follows: By setting up a combined structure of welding support frame, rotating positioning seat, welding fixture, adjustment mechanism and stabilizing device, the precise positioning and stable clamping of transmission line tower components are achieved. The rotatable characteristic of the rotating positioning seat allows welding operations to be performed at different angles. The arc-shaped structure of the clamping claws of the welding fixture can adapt to tower components with different cross-sections. The screw drive assembly of the adjustment mechanism provides a precise clamping force adjustment function. The support rod and locking block of the stabilizing device ensure the stability and safety of the entire welding process.

[0007] Based on the above technical solution, the welding assembly for transmission line towers of this utility model can be further improved as follows:

[0008] The base plate has fixing holes at its four corners, with a diameter of 12mm to 16mm. The column is a steel pipe structure with a circular cross-section, an outer diameter of 80mm to 120mm, and a wall thickness of 8mm to 12mm. The base plate and the column are connected by annular reinforcing ribs, which are arranged around the base of the column and welded to the base plate.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting fixing holes at the four corners of the base plate, a stable ground fixing method is provided; the circular cross-section steel pipe structure of the column has good load-bearing capacity and bending resistance; the reasonable outer diameter and wall thickness dimensions ensure structural strength and avoid material waste; the setting of the annular reinforcing rib plate effectively enhances the structural strength at the connection between the base plate and the column, and improves the stability and load-bearing capacity of the entire support frame.

[0010] Furthermore, the inner wall of the annular seat of the rotating positioning seat is provided with an annular groove, the width of which is 15mm to 25mm and the depth is 8mm to 12mm; the bearing assembly includes an upper bearing and a lower bearing, which are respectively installed at the upper end and the lower end of the annular seat, the inner ring of the bearing mates with the outer wall of the column, and the outer ring of the bearing mates with the annular groove; the number of radial extension arms is 3, and each radial extension arm is evenly distributed at 120 degrees along the circumference of the annular seat.

[0011] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the annular groove on the inner wall of the annular seat provides a precise installation position for the bearing assembly; the configuration of the upper and lower bearings enables the smooth rotation of the rotary positioning seat and reduces frictional resistance; the 120-degree uniform distribution design of the three radial extension arms ensures the uniform distribution of clamping force and improves clamping stability; at the same time, this symmetrical layout also enhances the balance and anti-overturning ability of the entire structure.

[0012] Furthermore, the clamping base of the welding fixture has an L-shaped structure, and the vertical part of the clamping base is connected to the radial extension arm by a pin, the axis of the pin being parallel to the axis of the column; the inner arc surface of the arc structure of the clamping claw is provided with anti-slip texture, the anti-slip texture being a V-shaped groove with a depth of 1mm to 3mm, the V-shaped groove being evenly distributed along the length direction of the clamping claw; a limiting pin is provided at the hinge position between the clamping claw and the clamping base, the limiting pin being used to limit the maximum opening angle of the clamping claw to 90 degrees to 120 degrees.

[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the L-shaped structure of the clamping base provides good rigidity and stability; the pin connection method allows the clamping base to adjust the angle within a certain range; the V-shaped groove anti-slip texture on the inner arc surface of the clamping claw greatly enhances the friction with the clamped component, effectively preventing the component from slipping during the welding process; and the setting of the limiting pin ensures that the opening angle of the clamping claw is within a safe range, avoiding structural damage caused by excessive opening.

[0014] Furthermore, the screw of the screw drive assembly has a trapezoidal thread structure with a thread pitch of 2mm to 4mm and a screw diameter of 16mm to 24mm; the drive handle has a cross-shaped structure with two arms of equal length, each arm being 80mm to 120mm long; the front end of the screw is connected to the rear end of the clamping jaws via a threaded pair, and the rear end of the screw passes through the clamping base and is fixedly connected to the drive handle.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the trapezoidal thread structure of the screw has good self-locking performance and transmission efficiency; the reasonable pitch and diameter design not only ensures the adjustment accuracy but also provides sufficient clamping force; the cross-shaped drive handle design makes it easy for the operator to apply torque; the equal length design of the two arms ensures the balance of torque; and the threaded connection between the front end of the screw and the clamping claw realizes the precise control and reliable transmission of clamping force.

[0016] Furthermore, the support rod of the stabilizing device is an angle steel structure with specifications ranging from 40mm×40mm×4mm to 60mm×60mm×6mm; the locking block includes a block body and a locking bolt, the block body has a semi-circular groove matching the outer diameter of the column, the locking bolt passes through the block body and connects to the end of the support rod; the block body is made of No. 45 steel, and the surface is heat-treated to achieve a hardness of HRC40 to HRC50.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the support rod of the angle steel structure has good bending and torsional resistance; the reasonable specifications and dimensions reduce weight while ensuring strength; the semi-circular groove of the locking block and the perfect fit with the column ensure a stable connection; the locking bolt provides adjustable locking force; and the 45 steel material has good wear resistance and strength after heat treatment, and can withstand long-term use loads.

[0018] Furthermore, the radius of curvature of the arc-shaped structure of the gripping claw is 30mm to 50mm.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the curvature radius of the clamping claw arc structure is designed in the range of 30mm to 50mm, which can well adapt to the shape characteristics of commonly used components of transmission line towers. This curvature design not only ensures the contact area of ​​clamping but also avoids stress concentration, thereby improving the reliability of clamping and the protection effect on the surface of components.

[0020] Furthermore, the outer surface of the annular seat is provided with heat dissipation fins, which are evenly distributed along the circumference of the annular seat.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the heat dissipation fins on the outer surface of the ring seat significantly increase the heat dissipation area, effectively reducing the temperature rise of the rotary positioning seat during long-term use. The equidistant distribution of the heat dissipation fins ensures the uniformity of heat dissipation, prevents local overheating, and extends the service life of the bearing assembly.

[0022] Furthermore, the surface of the column is provided with a longitudinal groove, the depth of which is 2mm to 4mm and the width of which is 8mm to 12mm.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the longitudinal groove design on the surface of the column reduces the weight of the column and increases the surface area of ​​the column, which is conducive to heat dissipation. The depth and width design of the longitudinal groove provides good grip performance without affecting the structural strength, which facilitates the positioning and fixing of the locking block.

[0024] Furthermore, the height of the heat dissipation fins is 8mm to 15mm, the thickness is 3mm to 6mm, and the spacing between adjacent heat dissipation fins is 10mm to 20mm.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the precise control of the height, thickness and spacing of the heat dissipation fins achieves the best heat dissipation effect; the appropriate height ensures the heat dissipation area; the reasonable thickness ensures the heat dissipation effect while avoiding material waste; and the spacing design between adjacent heat dissipation fins is conducive to air circulation and improves the convective heat dissipation efficiency.

[0026] Compared with existing technologies, the beneficial effects of the transmission line tower welding assembly provided by this utility model are as follows: This utility model effectively solves the positioning and clamping problems in the welding process of transmission line towers through innovative structural design. The design of the rotating positioning seat allows welding operations to be performed within a 360-degree range, greatly improving the flexibility and accessibility of welding. The arc-shaped clamping claw design of the welding fixture can adapt to tower components with different cross-sectional shapes. The anti-slip texture ensures the reliability of clamping. The screw transmission system of the adjustment mechanism achieves precise control of the clamping force, avoiding the problems of component deformation caused by excessive clamping or component slippage caused by excessive clamping. The support rod and locking block configuration of the stabilizing device provide adjustable stable support, ensuring the stability and safety of the entire welding process. The design of the heat dissipation fins and longitudinal grooves effectively improves the heat dissipation performance of the equipment and extends its service life. The entire device has a compact structure, is easy to operate, accurately positioned, and reliably clamped, significantly improving the quality and efficiency of transmission line tower welding. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a structural schematic diagram of a welding assembly for a power transmission line tower.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 10. Welding support frame; 20. Rotary positioning seat; 30. Welding fixture; 40. Adjustment mechanism; 50. Stabilizing device. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0032] like Figure 1 The image shows a first embodiment of a welding assembly for a transmission line tower provided by this utility model. In this embodiment, it includes: a welding support frame 10, a rotating positioning seat 20, a welding fixture 30, an adjusting mechanism 40, and a stabilizing device 50. The welding support frame includes a base plate and a column. The base plate is a rectangular steel plate structure, and the column is vertically fixed at the geometric center of the base plate. The rotating positioning seat is rotatably connected to the upper end of the column via a bearing assembly. The rotating positioning seat includes an annular seat body and radially extending arms. The inner diameter of the annular seat body matches the outer diameter of the column, and the radially extending arms are evenly distributed along the circumference of the annular seat body. The welding fixture is installed at the end of the radial extension arm. The welding fixture includes a clamping base and clamping claws. The clamping base is connected to the radial extension arm via a hinge shaft. The clamping claws have an arc-shaped structure and are hinged to the clamping base. The adjustment mechanism includes a screw drive assembly and a drive handle. The screw of the screw drive assembly passes through the clamping base and is threaded to the rear end of the clamping claws. The drive handle is fixed to the outer end of the screw. The stabilizing device includes a support rod and a locking block. One end of the support rod is fixedly connected to the annular seat of the rotary positioning seat, and the other end is connected to the column via the locking block. The locking block is slidably adjustable along the axial direction of the column and has a locking function.

[0033] In the above technical solution, the base plate is provided with fixing holes at the four corners, the diameter of which is 12mm to 16mm. The column is a steel pipe structure with a circular cross-section, the outer diameter of which is 80mm to 120mm, and the wall thickness of which is 8mm to 12mm. The base plate and the column are connected by annular reinforcing ribs, which are set around the base of the column and welded to the base plate.

[0034] Furthermore, in the above technical solution, the inner wall of the annular seat of the rotating positioning seat is provided with an annular groove, the width of which is 15mm to 25mm and the depth is 8mm to 12mm; the bearing assembly includes an upper bearing and a lower bearing, which are respectively installed at the upper end and the lower end of the annular seat, the inner ring of the bearing mates with the outer wall of the column, and the outer ring of the bearing mates with the annular groove; the number of radial extension arms is 3, and each radial extension arm is evenly distributed at 120 degrees along the circumference of the annular seat.

[0035] Furthermore, in the above technical solution, the clamping base of the welding fixture is an L-shaped structure. The vertical part of the clamping base is connected to the radial extension arm by a pin, and the axial direction of the pin is parallel to the axial direction of the column. The inner arc surface of the arc structure of the clamping claw is provided with anti-slip texture. The anti-slip texture is a V-shaped groove with a depth of 1mm to 3mm, and the V-shaped groove is evenly distributed along the length direction of the clamping claw. A limiting pin is provided at the hinge position between the clamping claw and the clamping base. The limiting pin is used to limit the maximum opening angle of the clamping claw to 90 degrees to 120 degrees.

[0036] Furthermore, in the above technical solution, the screw of the screw drive assembly has a trapezoidal thread structure with a thread pitch of 2mm to 4mm and a screw diameter of 16mm to 24mm; the drive handle has a cross-shaped structure with two arms of equal length, each arm being 80mm to 120mm long; the front end of the screw is connected to the rear end of the clamping jaws via a threaded pair, and the rear end of the screw passes through the clamping base and is fixedly connected to the drive handle.

[0037] Furthermore, in the above technical solution, the support rod of the stabilizing device is an angle steel structure with specifications ranging from 40mm×40mm×4mm to 60mm×60mm×6mm; the locking block includes a block body and a locking bolt, the block body has a semi-circular groove that matches the outer diameter of the column, the locking bolt passes through the block body and connects to the end of the support rod; the block body is made of No. 45 steel, and the surface is heat-treated to achieve a hardness of HRC40 to HRC50.

[0038] Furthermore, in the above technical solution, the radius of curvature of the arc-shaped structure of the gripper is 30mm to 50mm.

[0039] Furthermore, in the above technical solution, the outer surface of the annular base is provided with heat dissipation fins, which are distributed at equal intervals along the circumference of the annular base.

[0040] Furthermore, in the above technical solution, the surface of the column is provided with a longitudinal groove, the depth of which is 2mm to 4mm and the width is 8mm to 12mm.

[0041] Furthermore, in the above technical solution, the height of the heat dissipation fins is 8mm to 15mm, the thickness is 3mm to 6mm, and the spacing between adjacent heat dissipation fins is 10mm to 20mm.

[0042] In this embodiment, the welded support frame is made of Q235 steel. The base plate is a rectangular steel plate of 600mm×600mm×15mm, with 14mm diameter fixing holes at the four corners. The column is a circular steel pipe with an outer diameter of 100mm, a wall thickness of 10mm, and a height of 1200mm. The column and the base plate are connected by annular reinforcing ribs with a thickness of 8mm and a height of 80mm. The annular seat of the rotating positioning seat has an inner diameter of 102mm, an outer diameter of 180mm, and a height of 60mm. The annular groove is 20mm wide and 10mm deep. The bearing assembly uses a deep groove ball bearing, model 6020, with a radial extension arm length of 250mm and a cross-section of 40mm×4mm. The welding fixture uses 0mm square steel, with three radially extending arms evenly distributed at 120-degree angles along the circumference of the ring-shaped base. The clamping base adopts an L-shaped structure, with vertical dimensions of 80mm×60mm×12mm and horizontal dimensions of 60mm×60mm×12mm. The arc-shaped structure of the clamping claws has a radius of curvature of 40mm, a length of 120mm, and a thickness of 15mm. The V-groove depth of the inner arc surface is 2mm, with a spacing of 10mm. The screw diameter of the adjusting mechanism is 20mm, the pitch is 3mm, and the material is 45# steel with a galvanized anti-corrosion surface. The arm length of the drive handle is 100mm. The support rod of the stabilizing device uses 50mm×50mm×5mm angle steel, with a length... The length is 400mm, the locking block is made of 45# steel, and it has been heat-treated to achieve a hardness of HRC45. The diameter of the semi-circular groove is 102mm, the height of the heat dissipation fins is 12mm, the thickness is 4mm, and the spacing is 15mm. The longitudinal groove depth on the column surface is 3mm and the width is 10mm. The principle of this embodiment is to achieve 360-degree adjustment of the welding angle through the rotation function of the rotating positioning seat. The arc-shaped clamping claws of the welding fixture are adapted to tower components with different cross-sections. The screw transmission system of the adjustment mechanism provides precise clamping force control, and the stabilizing device ensures the stability of the entire system. During operation, the device is first fixed on the workbench, and then the angle steel component to be welded is placed between the clamping claws. The rotating drive handle clamps the components, and the angle of the rotating positioning seat is adjusted to optimize the welding position. The locking and stabilizing device provides additional support for welding operations. This device is primarily used for on-site welding of transmission line towers, and is particularly suitable for welding common tower components such as angle steel and channel steel. It significantly improves welding accuracy and efficiency, reduces manual labor intensity, and ensures welding quality. The heat dissipation fins effectively solve the heat dissipation problem during long-term operation, extending the equipment's service life. The entire device has a compact structure, facilitating transportation and on-site use. Through modular design, each component is easy to maintain and replace. This embodiment fully demonstrates the technical advantages and practical value of this invention.

[0043] Specifically, the principle of this utility model is as follows: This utility model adopts a modular design concept, decomposing the welding assembly into five main parts: a welding support frame, a rotating positioning seat, a welding fixture, an adjustment mechanism, and a stabilizing device. Each part works in coordination to achieve the intended function. The welding support frame serves as the foundation of the entire device; the rectangular structure of the base plate provides a stable support platform; the circular cross-section design of the column provides good bending resistance; and the annular reinforcing ribs effectively distribute the load. The rotating positioning seat is a key component for angle adjustment; the annular seat is connected to the column via a bearing assembly, achieving smooth rotational movement. The three-point equiangular distribution design of the radial extension arm follows the geometric principle that three points determine a plane, ensuring clamping stability. The arc-shaped clamping claw design of the welding fixture is based on contact mechanics principles, increasing the contact area with the clamped component and reducing contact traction. The V-groove design with anti-slip texture utilizes the principle of friction to effectively prevent component slippage. The screw drive system of the adjustment mechanism converts rotational motion into linear motion, achieving precise control of the clamping force. The self-locking characteristic of the trapezoidal thread ensures the stability of the clamping force. The cross-shaped drive handle design facilitates the operator in applying torque. The support rod and locking block configuration of the stabilizing device provide additional stable support. The angle steel structure support rod has good bending and torsional resistance. The semi-circular groove of the locking block and its cooperation with the column achieve a reliable connection. The heat dissipation fin design is based on the principle of heat transfer, increasing the heat dissipation area and improving heat dissipation efficiency. The longitudinal groove design increases the surface area while reducing weight, which is beneficial for heat dissipation. The design of the entire device follows the basic principles of mechanical design, achieving the design goals of simple structure, complete function, and convenient operation.

[0044] In use, first place the welding support frame on a flat surface and fix it to the ground or workbench with bolts through the fixing holes on the base plate to ensure the stability of the support frame. Then, place the tower component to be welded near the welding fixture, and rotate the rotary positioning seat to adjust the radial extension arm to a suitable angle so that the clamping jaws can easily clamp the component. Next, release the drive handle of the adjustment mechanism to open the clamping jaws, and place the tower component between the clamping jaws. The axis of the component should be parallel to the opening direction of the clamping jaws. Then, gradually rotate the drive handle to make the screw drive the clamping jaws to gradually clamp the component. During the clamping process... During the process, it is important to observe the deformation of the components to avoid excessive clamping that could cause deformation. After clamping, adjust the support rod and locking block of the stabilizing device to ensure a stable connection with the column, providing additional support and ensuring the stability of the entire system. If the welding angle needs to be adjusted during welding, the locking block can be loosened, the positioning seat can be rotated to adjust to the required angle, and then the locking block can be tightened again. After welding, first loosen the locking block of the stabilizing device, then rotate the drive handle of the adjusting mechanism counterclockwise to loosen the clamping jaws from the components. Finally, the welded components can be removed. The entire operation is simple and intuitive, and can be completed by one person, greatly improving work efficiency.

Claims

1. A welding assembly for transmission line towers, characterized in that, include: The welding support frame includes a rotating positioning seat, a welding fixture, an adjustment mechanism, and a stabilizing device. The welding support frame comprises a base plate and a column. The base plate is a rectangular steel plate structure, and the column is vertically fixed at the geometric center of the base plate. The rotating positioning seat is rotatably connected to the upper end of the column via a bearing assembly. The rotating positioning seat includes an annular seat body and radially extending arms. The inner diameter of the annular seat body matches the outer diameter of the column, and the radially extending arms are evenly distributed along the circumference of the annular seat body. The welding fixture is installed at the end of the radially extending arms and includes a clamping mechanism. The device includes a base and a clamping jaw. The base is connected to a radially extending arm via a hinge shaft, and the jaw has an arc-shaped structure and is hinged to the base. The adjustment mechanism includes a screw drive assembly and a drive handle. The screw of the screw drive assembly passes through the base and is threaded to the rear end of the jaw. The drive handle is fixed to the outer end of the screw. The stabilizing device includes a support rod and a locking block. One end of the support rod is fixedly connected to the annular seat of the rotary positioning seat, and the other end is connected to the column via the locking block. The locking block is adjustable along the axial direction of the column and has a locking function.

2. The welding assembly for a transmission line tower according to claim 1, characterized in that, The base plate has fixing holes at its four corners, with a diameter of 12mm to 16mm. The column is a steel pipe structure with a circular cross-section, an outer diameter of 80mm to 120mm, and a wall thickness of 8mm to 12mm. The base plate and the column are connected by annular reinforcing ribs, which are set around the base of the column and welded to the base plate.

3. The welding assembly for transmission line towers according to claim 2, characterized in that, The inner wall of the annular seat of the rotating positioning seat is provided with an annular groove, the width of which is 15mm to 25mm and the depth is 8mm to 12mm; the bearing assembly includes an upper bearing and a lower bearing, which are respectively installed at the upper end and the lower end of the annular seat, the inner ring of the bearing mates with the outer wall of the column, and the outer ring of the bearing mates with the annular groove; the number of radial extension arms is 3, and each radial extension arm is evenly distributed at 120 degrees along the circumference of the annular seat.

4. The welding assembly for transmission line towers according to claim 3, characterized in that, The clamping base of the welding fixture has an L-shaped structure. The vertical part of the clamping base is connected to the radial extension arm by a pin, and the axial direction of the pin is parallel to the axial direction of the column. The inner arc surface of the arc structure of the clamping claw is provided with anti-slip texture. The anti-slip texture is a V-shaped groove with a depth of 1mm to 3mm, and the V-shaped groove is evenly distributed along the length direction of the clamping claw. A limiting pin is provided at the hinge position between the clamping claw and the clamping base. The limiting pin is used to limit the maximum opening angle of the clamping claw to 90 degrees to 120 degrees.

5. A welding assembly for transmission line towers according to claim 4, characterized in that, The screw of the screw drive assembly has a trapezoidal thread structure with a thread pitch of 2mm to 4mm and a screw diameter of 16mm to 24mm. The drive handle has a cross-shaped structure with two arms of equal length, each arm being 80mm to 120mm long. The front end of the screw is connected to the rear end of the clamping jaws via a threaded pair, and the rear end of the screw passes through the clamping base and is fixedly connected to the drive handle.

6. A welding assembly for transmission line towers according to claim 5, characterized in that, The support rod of the stabilizing device is an angle steel structure with specifications ranging from 40mm×40mm×4mm to 60mm×60mm×6mm. The locking block includes a block body and a locking bolt. The block body has a semi-circular groove that matches the outer diameter of the column. The locking bolt passes through the block body and is connected to the end of the support rod. The block body is made of No. 45 steel and its surface is heat-treated to achieve a hardness of HRC40 to HRC50.

7. A welding assembly for transmission line towers according to claim 6, characterized in that, The radius of curvature of the arc-shaped structure of the gripper is 30mm to 50mm.

8. A welding assembly for transmission line towers according to claim 7, characterized in that, The outer surface of the annular base is provided with heat dissipation fins, which are evenly distributed along the circumference of the annular base.

9. A welding assembly for transmission line towers according to claim 8, characterized in that, The surface of the column is provided with a longitudinal groove, the depth of which is 2mm to 4mm and the width of which is 8mm to 12mm.

10. A welding assembly for transmission line towers according to claim 9, characterized in that, The height of the heat dissipation fins is 8mm to 15mm, the thickness is 3mm to 6mm, and the spacing between adjacent heat dissipation fins is 10mm to 20mm.

Images