Large-span steel structure high-altitude sectional assembly welding tool

Abstract

The present application relates to the field of welding equipment, specifically is a kind of large-span steel structure high-altitude segmented assembly welding tool, including manipulator and the support plate being arranged above steel structure, the upper side of support plate is connected with manipulator by connecting assembly in the way of sliding disassembly, the bottom of support plate is connected with limiting mechanism, limiting mechanism is used to limit the position of support plate, the present application uses moving assembly to drive moving plate to approach each other, so that two limiting frames are pasted on the outside of steel structure, and so that abutting block is located in steel structure to prevent support plate from rolling over, so that support plate is always kept connected with steel structure during moving and transposition, effectively avoid falling risk, by moving limiting frame to drive abutting block to abut on steel structure, support plate can be locked on the steel structure to be welded, the movement and locking of manipulator position are completed, and the overall stability is enhanced.

Description

Technical Field

[0001] This invention relates to the field of welding equipment, specifically a welding fixture for high-altitude segmented assembly of large-span steel structures. Background Technology

[0002] Large-span steel structures are widely used in modern industrial plants, stadiums, transportation hubs and other large public buildings. Due to their large span, heavy components and complex nodes, they often need to be assembled and welded in sections at high altitudes. In actual construction, welding equipment often needs to be moved along the main components such as steel beams and columns to complete welding operations in different positions and directions.

[0003] Currently, high-altitude welding operations mostly use traditional clamping and locking structures in conjunction with welding robots. These devices are usually fixed directly to a certain position on the steel structure by clamps or bolts, and the robot performs welding operations on this fixed base. Although this type of structure can achieve a certain degree of stable welding, its installation method is relatively rigid and relies heavily on manual adjustment. In actual construction, there are many welding positions that require the welding equipment to be moved along the steel structure frequently.

[0004] When welding needs to be repositioned, that is, moved from one welding position to another, the equipment is prone to shaking or even slipping, posing a high safety risk. In addition, existing welding equipment generally requires multiple people to cooperate when the welding position needs to be adjusted, which greatly reduces the convenience of operation. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: it includes a robotic arm and a support plate arranged above a steel structure. The upper side of the support plate is connected to the robotic arm by a connecting component in a sliding and detachable manner. The bottom of the support plate is connected to a limiting mechanism, which is used to limit the position of the support plate.

[0006] The limiting mechanism includes two symmetrically arranged movable plates arranged front and back on the underside of the support plate via a movable component. A limiting frame is bolted to the underside of the movable plates, and an abutment block is fixedly installed on the underside of the limiting frame. The movable component is used to drive the two movable plates to move synchronously in opposite directions by synchronous pushing and pulling.

[0007] The moving component moves the moving plates closer together, causing the two limit frames to abut against the outside of the steel structure. At this time, the abutment block is located inside the steel structure to prevent the support plate from tipping over. The support plate moves to the welding position on the steel structure, and the upward-moving limit frame drives the abutment block to abut against the steel structure, so that the support plate is locked in the position of the steel structure to be welded, thus completing the movement and locking of the robot arm.

[0008] In a preferred embodiment, the movable plate has several bolt holes that extend vertically through it at equal intervals along the front-back direction, and the limiting frame has two through holes corresponding to the bolt holes. The position of the limiting frame can be moved back and forth to connect steel structures of different widths.

[0009] In a preferred embodiment, the connecting assembly includes a support seat that slides left and right onto the support plate. The upper side of the support seat is fixedly connected to the base of the robotic arm. The support seat is fixed in position by inserting a fastening screw, which is threaded into the middle of the support plate, into a pre-set blind hole.

[0010] In a preferred embodiment, two symmetrically arranged rotating rollers are rotatably arranged on the lower side of the support plate, and a vertically arranged limiting roller is rotatably arranged on the side of the limiting frame near the center of the support plate.

[0011] In a preferred embodiment, the movable component includes an H-shaped plate that is slidably disposed on the lower side of the support plate via a guide post. The lower side of the H-shaped plate is slidably connected to two corresponding movable plates at the front and rear positions in the front-rear direction. A drive post is inserted into the center of the support plate.

[0012] In a preferred embodiment, the drive column is rotatably connected to the center of the H-shaped plate, and two push-pull plates are hinged to the lower end of the drive column. The end of the push-pull plate away from the drive column is hinged to a moving plate at the corresponding position.

[0013] In a preferred embodiment, a handle is rotatably provided at the upper end of the drive column, and symmetrically arranged eccentric wheels are fixedly mounted on the handle along the same axis. A pressing block for pushing the eccentric wheels is slidably provided on the outer side of the drive column, and a tension spring is provided between the pressing block and the drive column.

[0014] In a preferred embodiment, an adjusting ring is threaded to the lower outer end of the pressing block. The upper side of the adjusting ring has several equally spaced positioning holes along its circumference. The adjusting ring is positioned by pins that pass through it and the pressing block. Several wedge-shaped blocks for insertion into the support plate are fixedly installed at equal intervals along its circumference on the lower side of the adjusting ring.

[0015] The beneficial effects of this invention are as follows: First, this invention uses a moving component to move the moving plates closer to each other, so that the two limiting frames are attached to the outside of the steel structure, and the abutment block is located inside the steel structure to prevent the support plate from tipping over. This ensures that the support plate remains connected to the steel structure during the movement and repositioning process, effectively avoiding the risk of falling. By moving the limiting frame upwards to move the abutment block against the steel structure, the support plate can be locked onto the steel structure to be welded, completing the movement and locking of the robot's position and enhancing overall stability.

[0016] Second, the present invention adopts a structure with multiple bolt holes on the limiting frame, which can adjust the position of the limiting frame according to the width of the steel structure, realize the quick connection of steel structures of different widths, simplify the high-altitude operation steps, and improve the ease of operation.

[0017] Third, the present invention uses a drive column in the moving component connected to a handle. Rotating the handle controls the rotation of the drive column, which in turn drives the limit frame to move back and forth through the push-pull plate. At the same time, the swing of the handle pushes the pressure block through the eccentric wheel, thereby pulling the drive column. This allows the operator to complete the connection and locking of the support plate and the steel structure by controlling the rotation of the handle in two directions, improving the convenience of connection and welding efficiency. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention when welding parallel steel structures.

[0020] Figure 2 This is a schematic diagram of the first overall structure of the present invention when welding vertically arranged steel structures.

[0021] Figure 3 This is a schematic diagram of the second integral structure of the present invention when welding vertically arranged steel structures.

[0022] Figure 4 This is a cross-sectional view of the support plate, handle, eccentric wheel and push-pull plate in this invention.

[0023] Figure 5 This is a schematic diagram of the structure of the H-shaped plate, driving column, moving plate and abutment block in this invention.

[0024] Figure 6 This is a schematic diagram of the structure of the drive column, pressure block, eccentric wheel and handle in this invention.

[0025] Figure 7 This is a cross-sectional view of the driving column and the pressure block in this invention.

[0026] Figure 8 This is a cross-sectional view of the support plate in this invention.

[0027] Figure 9 This is a cross-sectional view of the right support plate, left support plate, rib plate and locking square rod in this invention.

[0028] In the diagram: 1. Robotic arm; 2. Right support plate; 3. Left support plate; 4. Support plate; 5. Connecting assembly; 6. Limiting mechanism; 7. Locking mechanism; 41. Rotating roller; 51. Bearing seat; 61. Moving assembly; 62. Moving plate; 63. Limiting frame; 64. Abutting block; 71. Rib plate; 72. Locking square rod; 611. Guide column; 612. H-shaped plate; 613. Drive column; 614. Push-pull plate; 615. Handle; 616. Eccentric wheel; 617. Pressing block; 618. Adjusting ring; 619. Wedge block; 631. Limiting roller. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0030] See Figure 1 , Figure 2 and Figure 3 A high-altitude segmented assembly and welding fixture for a large-span steel structure includes a robotic arm 1 and a support plate 4 arranged above the steel structure. The upper side of the support plate 4 is connected to the robotic arm 1 by a connecting component 5 in a sliding and detachable manner. The bottom of the support plate 4 is connected to a limiting mechanism 6, which is used to limit the position of the support plate 4.

[0031] Right support plate 2

[0032] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The limiting mechanism 6 includes two symmetrically arranged movable plates 62 on the underside of the support plate 4 via a movable component 61. A limiting frame 63 is bolted to the underside of the movable plates 62. An abutment block 64 is fixedly installed on the underside of the limiting frame 63. The movable component 61 is used to drive the two movable plates 62 to move synchronously in opposite directions by synchronous pushing and pulling.

[0033] Continue reading Figure 1 , Figure 2 , Figure 3 and Figure 4 The support plate 4 has two symmetrically arranged rotating rollers 41 on its lower side, and the limiting frame 63 has a vertically arranged limiting roller 631 on its side near the center of the support plate 4.

[0034] When welding two steel structures, i.e., welding the connection of two parallel steel structures, the operator first places the support plate 4 on the upper part of the steel structure, so that the two rotating rollers 41 abut against the upper side of the steel structure. Then, the operator manually operates the moving component 61 to drive the limiting frame 63 to move closer to the steel structure through the moving plate 62, until the limiting frame 63 drives the limiting roller 631 on it to abut against the front and rear sides of the steel structure.

[0035] At this point, the limiting frame 63 drives the abutment block 64 to extend into the interior of the steel structure, which causes the abutment block 64 to engage with the steel structure, ensuring that the support plate 4 and the steel structure are stably together. The operator moves the robot arm 1 to the welding position by pushing the support plate 4 on the steel structure. Then, the worker moves the abutment block 64 upward again using the moving component 61, so that it abuts against the steel structure. This achieves the clamping of the abutment block 64 with the rotating roller 41, which is arranged laterally, thus locking the support plate 4 and the steel structure. After that, the robot arm 1 welds the two parallel steel structures. After welding is completed, the limiting frame 63 is moved downward, and then the support plate 4 is pushed again, which will move the robot arm 1 to the next welding position.

[0036] In another embodiment of the invention, such as Figure 2 and 3 As shown, when welding at the junction of two vertically arranged steel materials, the present invention provides two support plates 4. The two support plates 4 have the same connection structure, and a right support plate 2 is fixedly installed at one end of the right support plate 4. A left support plate 3 is hinged to the left side of the right support plate 2. The left support plate 3 is fixedly connected to the left support plate 4. The right support plate 2 and the left support plate 3 are both provided with a locking mechanism 7 that locks the two support plates 4 to be arranged perpendicularly to each other.

[0037] The operator rotates the left support plate 4 upwards by 90 degrees, so that the two support plates 4 are arranged vertically. The angle of the two vertically arranged support plates 4 is locked by the locking mechanism 7. Then the operator moves the support plate 4 to the left, so that the rotating roller 41 on the left support plate 4 abuts against the vertically arranged steel structure. On the same principle, the left support plate 4 is connected to the vertically arranged steel structure, thereby completing the fixation of the support plate 4. When the tooling uses two support plates 4 for welding, it can simultaneously constrain two horizontally and vertically arranged steel structures, thereby enhancing the overall stability.

[0038] Then, the two steel structures arranged horizontally and vertically are welded using robotic arm 1. After welding, the left support plate 4 is unlocked from the vertically arranged steel structure, and then the support plate 4 is moved to the right. The left support plate 4 is then flipped over, and the two support plates 4 are arranged parallel to each other. Next, the left support plate 4 is slidably connected to the horizontally arranged steel structure. Then, the support plate 4 is moved to the right, and the robotic arm 1 is moved synchronously via the connecting component 5. During the moving and repositioning welding process, the connection with the steel structure is maintained, effectively avoiding the risk of falling. This continues until the right end of the horizontally arranged steel structure is welded. The principle is the same as above, connecting the two support plates 4 to the two steel structures respectively, and the robotic arm 1 performs stable welding. To facilitate the movement of the robotic arm 1, allowing it to perform welding operations on more positions of the two horizontally and vertically arranged steel structures, and to prevent the operator from moving the robotic arm 1 synchronously when flipping the support plate 4, thus increasing the operational effort and difficulty, the present invention designs the following structure: (See reference) Figure 2 and Figure 3 The connecting component 5 includes a support seat 51 that slides left and right onto the support plate 4. The upper side of the support seat 51 is fixedly connected to the base of the robot arm 1. The support seat 51 is fixed in position by inserting a fastening screw threaded in its middle into a preset blind hole on the support plate 4.

[0039] When two support plates 4 are arranged in parallel and simultaneously slidably connected to two transversely arranged steel structures, the operator can manually move the bearing seat 51 from one support plate 4 to the other support plate 4, thereby ensuring that the support plate 4 that needs to be flipped is not connected to the bearing seat 51. Then the operator manually rotates the fastening screw and inserts it into the corresponding blind hole to complete the interchange connection between the bearing seat 51 and the support plate 4.

[0040] To prevent the support base 51 from falling off when moving from one support plate 4 to another, the present invention is designed with the following structure: (Continue reading) Figure 2 and Figure 3 The length of the lower side of the support seat 51 is greater than the distance between the two support plates 4, so that when the support seat 51 moves from one support plate 4 to another support plate 4, it spans the two support plates 4, ensuring that the support seat 51 remains connected to the support plate 4 during the movement process.

[0041] To improve the ease and speed of connection between the support plate 4 and the steel structure, the present invention designs the following structure: (See attached diagram) Figure 2 , Figure 4 and Figure 5 The moving component 61 includes an H-shaped plate 612 that is slidably disposed on the lower side of the support plate 4 via a guide post 611. The lower side of the H-shaped plate 612 is slidably connected to two corresponding moving plates 62 in the front and rear directions. A drive post 613 is inserted at the center of the support plate 4.

[0042] See Figure 5 The drive column 613 is rotatably connected to the center position of the H-shaped plate 612. Two push-pull plates 614 are hinged to the lower end of the drive column 613. The end of the push-pull plate 614 away from the drive column 613 is hinged to the corresponding moving plate 62.

[0043] See Figure 4 , Figure 6 and Figure 7 A handle 615 is rotatably provided at the upper end of the drive column 613. A symmetrically arranged eccentric wheel 616 is fixedly installed on the handle 615 along the same axis. A pressing block 617 is slidably provided on the outer side of the drive column 613 for the eccentric wheel 616 to push. A tension spring is provided between the pressing block 617 and the drive column 613.

[0044] When the rotating roller 41 on the support plate 4 abuts against the upper side of the steel structure, the operator holds the handle 615 and rotates it around the drive column 613, causing the handle 615 to drive the drive column 613 to rotate. The drive column 613 pulls the two corresponding moving plates 62 at the front and rear positions closer to each other through the push-pull plate 614, so that the moving plates 62 drive the limiting roller 631 to abut against the front and rear sides of the steel structure through the limiting frame 63, and cause the limiting frame 63 to drive the abutment block 64 to extend into the interior of the steel structure.

[0045] The operator then swings the handle 615 around the connecting axis between the handle 615 and the drive column 613, causing the handle 615 to drive the eccentric wheel 616 to rotate. When the eccentric wheel 616 rotates, it pushes the pressing block 617 downward. At this time, the pressing block 617 abuts against the support plate 4, preventing the pressing block 617 from moving downward. Consequently, the reaction force of the pressing block 617 on the eccentric wheel 616 pushes the handle 615 upward. The handle 615 drives the limiting frame 63 to move upward synchronously through the drive column 613 and the H-shaped plate 612, causing the abutment block 64 to abut against the steel structure. This allows the abutment block 64 to cooperate with the rotating roller 41 to clamp the steel structure, so that it can be slidably connected to the steel structure through the limiting support plate 4.

[0046] To enhance adaptability to quick clamping and locking of steel structures of varying widths, this invention designs the following structure: (See attached diagram) Figure 5 The movable plate 62 has several bolt holes that pass through it vertically at equal intervals along the front-back direction. The limiting frame 63 has two through holes corresponding to the bolt holes. The position of the limiting frame 63 can be used to connect steel structures of different widths.

[0047] The operator can adjust the position of the limit frame 63 connected to the moving plate 62 in advance according to the width range of all steel structures that need to be welded at high altitude while on the ground. This allows the operator to manually turn the handle 615 to complete the connection of steel structures of all widths at high altitude without having to disassemble the parts during high-altitude operations, thus avoiding the risk of falling and injuring people.

[0048] To accommodate steel structures of varying thicknesses for quick clamping and locking, and to prevent the limiting frame 63 from shifting back and forth when the support plate 4 is connected to the steel structure, thus avoiding unstable connections, the present invention designs the following structure: (See attached diagram) Figure 4 , Figure 5 , Figure 6 and Figure 8 An adjusting ring 618 is threaded to the lower outer end of the pressing block 617. The upper side of the adjusting ring 618 has several equally spaced positioning holes along its circumference. The adjusting ring 618 is positioned by pins that pass through it and the pressing block 617. Several wedge-shaped blocks 619 for inserting into the support plate 4 are fixedly installed at equal intervals along its circumference on the lower side of the adjusting ring 618.

[0049] The operator can rotate the adjusting ring 618 according to the thickness of the steel structure, so that the adjusting ring 618 moves up and down relative to the pressure block 617, thereby changing the initial height between the lower end of the adjusting ring 618 and the handle 615. This allows the adjusting ring 618 to drive the drive column 613 to adjust up and down synchronously through the pressure block 617, so that the distance between the drive column 613 and the abutment block 64 and the steel structure of different thicknesses is consistent in the initial state, so that when the handle 615 is swung, the abutment block 64 can abut against the steel structure.

[0050] After adjusting the height of the adjusting ring 618, the operator manually inserts the pin into the corresponding positioning hole of the adjusting ring 618 and the pressure block 617, so that the adjusting ring 618 and the pressure block 617 are connected together and cannot rotate. Therefore, when the handle 615 is rotated along the axis of the drive column 613 to drive the limit roller 631 to abut against the front and rear sides of the steel structure, the drive column 613 drives the adjusting ring 618 to rotate through the pressure block 617, so that the wedge surface of the wedge block 619 on the adjusting ring 618 intermittently contacts the support plate 4. By pushing the wedge block 619 upward through the support plate 4, the adjusting ring 618 can rotate continuously.

[0051] When the handle 615 is swung, the pressure block 617 pushes the adjusting ring 618, causing the adjusting ring 618 to drive the wedge block 619 to insert into the support plate 4. The vertical surface of the wedge block 619 blocks the adjusting ring 618 from reversing, thus preventing the limit frame 63 from moving back and forth and causing unstable connection.

[0052] To quickly lock the two vertically arranged support plates 4, the present invention is designed with the following structure: (See attached diagram) Figure 2 , Figure 3 and Figure 9 The locking mechanism 7 includes two symmetrically arranged ribs 71 fixedly installed on the upper side of the left support plate 3. The left part of the rib 71 is an arc shape with a rectangular groove. The right support plate 2 has an arc groove for the arc part of the rib 71 to pass through. A locking rod 72 for inserting into the rectangular groove is slidably arranged inside the arc groove.

[0053] When the operator manually rotates the right support plate 4, the right support plate 4 drives the right support plate 2 to rotate synchronously, so that the arc groove on the right support plate 2 is fitted onto the outside of the arc structure of the rib plate 71. When the right support plate 2 is pressed against the rib plate 71, the two support plates 4 are arranged vertically. At this time, the right support plate 2 drives the locking rod 72 to move to the position of the rectangular groove. By moving the locking rod 72 into the rectangular groove, the right support plate 2 and the rib plate 71 are locked together, thereby completing the vertical locking of the two support plates 4.

[0054] It should be noted that, as Figure 9 As shown, the locking square rod 72 and the right support plate 2 between A helical spring is provided, and the locking rod 72 is continuously pushed by the elastic force of the helical spring, so that the locking rod 72 can be stably engaged inside the rectangular groove, thereby continuously locking the two support plates 4.

[0055] This invention allows for the connection and locking of the support plate 4 to the steel structure by controlling the rotation of the handle 615 in two directions, significantly improving the convenience and efficiency of high-altitude welding operations. Furthermore, the handle 615 can be controlled with one hand, further providing convenience for welders. The support plate 4 can maintain its connection with the steel structure during the welding process of moving and repositioning, effectively avoiding the risk of falling. By arranging the two support plates 4 vertically, constraints can be applied to the two horizontally and vertically arranged steel structures simultaneously during welding, enhancing the overall welding stability.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-altitude segmental assembly and welding fixture for large-span steel structures, comprising a robotic arm, characterized in that, It also includes a support plate arranged above the steel structure. The upper side of the support plate is connected to the robot arm in a sliding and detachable manner through a connecting component. The bottom of the support plate is connected to a limiting mechanism, which is used to limit the position of the support plate. The limiting mechanism includes two symmetrically arranged movable plates arranged front and back on the underside of the support plate via a movable component. A limiting frame is bolted to the underside of the movable plates, and an abutment block is fixedly installed on the underside of the limiting frame. The movable component is used to drive the two movable plates to move synchronously in opposite directions by synchronous pushing and pulling. The moving component moves the moving plates closer together, causing the two limit frames to stick to the outside of the steel structure. At this time, the abutment block is located inside the steel structure to prevent the support plate from tipping over. The support plate moves to the welding position on the steel structure, and the upward moving limit frame drives the abutment block to abut against the steel structure, so that the support plate is locked in the position of the steel structure to be welded, thus completing the movement and locking of the robot arm position. The movable plate has several bolt holes that pass through vertically at equal intervals along the front-back direction. The limiting frame has two through holes corresponding to the bolt holes. The position of the front-back moving limiting frame is used to connect steel structures of different widths. The connecting assembly includes a support seat that slides left and right onto the support plate, with the upper side of the support seat fixedly connected to the base of the robotic arm; The support plate has blind holes, and the bearing seat is fixed in position by inserting a fastening screw, which is threaded in the middle of the support plate, into the blind holes. The support plate has two symmetrically arranged rotating rollers on its lower side, and the limiting frame has a vertically arranged limiting roller on its side near the center of the support plate. The moving component includes an H-shaped plate that is slidably disposed on the underside of the support plate via a guide post. The underside of the H-shaped plate is slidably connected to two corresponding moving plates at the front and rear positions in the front-rear direction. A drive post is inserted at the center of the support plate. The drive column is rotatably connected to the center of the H-shaped plate, and two push-pull plates are hinged to the lower end of the drive column. The end of the push-pull plate away from the drive column is hinged to the corresponding movable plate. A handle is rotatably provided at the upper end of the drive column. Symmetrically arranged eccentric wheels are fixedly mounted on the handle along the same axis. A pressing block is slidably provided on the outer side of the drive column for the eccentric wheels to push. A tension spring is provided between the pressing block and the drive column.

2. The high-altitude segmental assembly and welding fixture for large-span steel structures according to claim 1, characterized in that, The lower outer end of the compression block is threaded with an adjusting ring, and the upper side of the adjusting ring is provided with a number of equally spaced positioning holes along its circumference.

3. The high-altitude segmental assembly and welding fixture for large-span steel structures according to claim 2, characterized in that, The adjusting ring is positioned by pins that pass through it and the pressure block. Several wedge-shaped blocks for insertion into the support plate are fixedly installed at equal intervals along the circumference of the lower side of the adjusting ring.

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