Automatic welding construction method for high-performance concrete latticed column cable bent tower in strong wind valley

Abstract

The invention provides an automatic welding construction method for a high-performance concrete latticed column cable bent tower in a strong wind valley, and relates to the technical field of bridge engineering cable bent tower construction. According to the automatic welding construction method for the high-performance concrete latticed column cable bent tower in the strong wind river valley, a bridge tower is included, the bridge tower is composed of tower columns and cross beams, the tower columns comprise the upper tower columns and the lower tower columns, the upper tower columns are provided with welding platforms used for construction operation, and the welding platforms are provided with platform anti-falling assemblies used for preventing the welding platforms from falling. And an automatic welding structure is arranged on the upper tower column. According to the automatic welding construction method for the high-performance concrete latticed column cable bent tower in the strong wind valley, when the concrete latticed column cable bent tower is built in the strong wind valley, the operation safety of the welding platform can be guaranteed through the platform anti-falling assembly, and the latticed column cable bent tower can be automatically welded in a high-precision, high-efficiency and high-quality mode through the automatic welding structure.

Description

Technical Field

[0001] This invention relates to the field of bridge tower construction technology, specifically to an automated welding construction method for high-performance concrete lattice column towers in strong wind valleys. Background Technology

[0002] As my country’s infrastructure construction capabilities continue to improve, infrastructure construction is gradually extending to some mountainous areas and complex environments, such as canyons. In order to reduce the structural weight and improve wind resistance, multiple high-performance concrete lattice column cable tower structures are usually adopted. These are spatial lattice cable towers connected by steel beams or steel nodes. Such lattice column cable tower structures usually involve a large number of high-strength, thick-walled steel structure welding operations.

[0003] When welding lattice column towers, welding platforms are usually installed on the towers. However, installing welding platforms on the towers and welding the towers often presents severe challenges, restricting construction efficiency, project quality, and safety. For example, due to the influence of strong winds in the valley, traditional manual high-altitude welding methods are unstable, inefficient, and dangerous. Furthermore, high-altitude welding often involves three-dimensional curved welding, vertical welding, or overhead welding, which takes place in confined spaces, resulting in high labor intensity, long construction periods, poor welding quality stability, and poor precision of plate units after welding. Moreover, the welding platform is erected at high altitude and is affected by the humid environment and wind in the valley, which can cause the weld between the platform and the tower to age rapidly. In severe cases, this can even lead to the welding platform falling, making welding platform operations unsafe. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an automated welding construction method for high-performance concrete lattice column cable towers in strong wind valleys. This method solves the problems of inconvenience in quickly and efficiently welding high-quality and precise cable towers and ensuring the safety of the welding platform during the welding construction of lattice column cable towers.

[0006] (II) Technical Solution

[0007] To facilitate rapid, efficient, high-quality, and precise welding of the lattice column cable towers during the above-mentioned welding construction, and to ensure the safety of the welding platform, this invention achieves this through the following technical solution: An automated welding construction method for high-performance concrete lattice column cable towers in strong wind valleys, comprising the following steps:

[0008] The first step is pre-construction preparation: Based on the tower's BIM model, the three-dimensional coordinates of the steel structure nodes and the weld type and size parameters are determined. The welds mainly include the circumferential butt joint of the tower column, the intersecting weld of the transverse web tube, and the fillet weld of the sealing plate. According to the river valley meteorological data, such as wind speed and historical temperature data, the temperature field and stress field under different welding process parameters are simulated using welding simulation software. The welding parameter library suitable for the current environment is optimized and determined, including current, voltage, welding speed, and interpass temperature control range. A special flexible track matching the weld trajectory is preset.

[0009] The second step is to accurately determine the steel structure nodes: the steel structure nodes are assembled in the factory and the nodes are decomposed into transportation units. Before or after the designated sections of the high-performance concrete lattice column are poured on site, a total station and a laser tracker are used for measurement and layout. The steel structure node units are accurately positioned in the air using a three-dimensional positioning jig, and a welding platform and a special flexible track system are installed.

[0010] The third step is the hoisting of the welding platform and platform fall protection components: According to the tower segment hoisting plan, the tower steel pipe lattice column is hoisted in sheet-like units. After being hoisted into place, it is fixed with temporary connectors. Then, the welding platform and platform fall protection components are installed. On-site high-altitude welding is performed on the tower column circumferential joint, the horizontal web pipe intersection weld, and the sealing plate fillet weld. The welding platform should be windproof and rainproof. The welding platform is made of steel rectangular tubes. The main columns and main crossbars are made of 100×50×4mm rectangular tubes, and the structural columns and structural crossbars are made of 40×40×4mm rectangular tubes. Each group of rectangular tubes surrounds the lattice. The columns are assembled into a frame cage structure with two operating platforms. The top surface of each operating platform is fully covered with steel mesh to ensure the safety of workers. Eight vertical limiting perforated plates are installed between the welding platform and the lattice columns. The perforated plates are welded to the main columns of the platform, and the perforated plates are pinned to the vertical ear plates of the lattice columns, thereby achieving temporary fixation between the welding platform and the lattice columns. At the same time, fireproof geotextile is laid on the bottom plate of the welding platform and around the platform to prevent welding sparks from falling to the ground and causing a fire. The suspension blocks on the platform anti-fall components, which are pre-fitted onto the steel pipes of the columns, are then connected to the welding platform through connecting rods.

[0011] The fourth step is automated welding: a track-mounted welding robot is used and installed on a dedicated flexible track system. It integrates a laser vision weld seam tracking system, an arc sensing system, and an adaptive control system. The robot uses a laser vision sensor to scan the actual weld seam and compares and compensates with the theoretical trajectory in the BIM model. It automatically generates a welding path that is adapted to the actual assembly precision. During the welding process, the arc sensor monitors the state of the molten pool in real time. Combined with feedback from environmental sensors such as wind speed and temperature, and dynamic calls and fine-tuning of welding parameters such as current, voltage, welding speed, and interpass temperature in the parameter library, the welding parameters are compensated for heat loss or uneven input caused by wind disturbance and temperature difference.

[0012] The fifth step is real-time quality monitoring: During the welding process, a multi-information fusion monitoring system is used to collect welding current and voltage, molten pool images, acoustic emission signals, and environmental parameters. The algorithm model is used to make a preliminary judgment on the weld formation quality and defects. After each weld is completed, a visual inspection is carried out immediately. After all welding is completed, non-destructive testing is carried out on important welds. After the test is qualified, the welds are subjected to post-heat insulation treatment. Electric heating blankets are used in conjunction with insulation cotton, and the post-heating temperature and cooling rate are strictly controlled to further eliminate residual welding stress. Finally, the welded area is coated with anti-corrosion coating and can be put into use.

[0013] Preferably, it also includes a bridge tower, which is composed of a tower column and two crossbeams, the tower column including an upper tower column and a lower tower column, the upper tower column is equipped with a welding platform composed of steel rectangular tubes for construction operations, the welding platform is equipped with a platform anti-fall component to prevent the welding platform from falling, and an automatic welding structure is provided on the upper tower column;

[0014] The upper tower column comprises four reinforced concrete steel pipe columns, which are erected on the lower tower column. Parallel web members, vertical steel plates, and rhomboid steel pipes are welded and fixed to the steel pipe columns. The rhomboid steel pipes are arranged in the plane of the parallel web members at the upper and lower ends of the vertical steel plates. The steel pipe columns, parallel web members, vertical steel plates, and rhomboid steel pipes together form a spatial lattice column. Horizontal and vertical ear plates are welded and fixed to the surface of the lattice column. Perforated plates are connected to the vertical ear plates by pins, and the perforated plates are welded and fixed to the main column on the welding platform.

[0015] Preferably, the column steel pipe is filled with shrinkage-compensating self-compacting C80 concrete.

[0016] Preferably, the lower tower column adopts a reinforced concrete structure, which is formed by encasing C55 steel fiber reinforced concrete with a stiff skeleton composed of steel pipe concrete columns and steel web members.

[0017] Preferably, the upper tower column is divided into multiple sections, which are connected by horizontal ear plates and pins.

[0018] Preferably, the platform fall arrestor includes a collar, which is mounted on the upright steel pipe. A cross-shaped bracket is welded and fixed between the collars. An inner groove is formed on the inner surface of the collar, and an outer groove is formed on the outer surface. A drive shaft rotates at the outer groove, and an inclined suspension block is fixed on the drive shaft. A T-shaped bracket is fixed inside the collar. A linkage shaft rotates at the bottom of the T-shaped bracket. A universal joint is provided between the linkage shaft and the drive shaft. An upper clamping block rotates at the top of the T-shaped bracket via a pivot pin. A lower clamping block is fixed on the linkage shaft. Anti-slip grooves are formed on the inner surfaces of both the upper and lower clamping blocks. A rack is provided at the outer cylindrical end of both the upper and lower clamping blocks.

[0019] Preferably, the suspension block is inclined outward, and the suspension block is connected to the welding platform via a connecting rod.

[0020] Preferably, the T-shaped bracket supports the upper clamping block to rotate via a pivot pin and supports the lower clamping block to rotate via a linkage shaft, and the drive shaft is connected to the linkage shaft via a universal joint.

[0021] Preferably, the anti-slip groove is a triangular groove, the anti-slip groove is arc-shaped and adapted to the arc-shaped surface of the column steel pipe, and the upper clamping block and the lower clamping block are driven by a rack and pinion meshing.

[0022] Preferably, the automated welding structure includes a flexible track, a track-type welding robot, a laser vision weld seam tracking system, an arc sensing system, an adaptive control system, and a multi-information fusion monitoring system.

[0023] (III) Beneficial Effects

[0024] This invention provides an automated welding construction method for high-performance concrete lattice column cable towers in strong wind valleys. It has the following beneficial effects:

[0025] 1. By adopting BIM-based pre-simulation and track-type robots and a dedicated flexible track system, the robot can automatically weld the preset weld seams, achieving high-precision, high-efficiency, and high-quality automated welding. Compared with manual welding, the quality is higher, the stability is better, and the construction cycle is shorter.

[0026] 2. The welding platform is composed of rectangular tubes surrounding lattice columns to form a frame cage structure. The top surface of the operating platform is fully covered with steel mesh, and the platform is surrounded by fireproof geotextile. This ensures the safety of workers and prevents welding sparks from falling to the ground and causing a fire, making the welding process safer and more reliable. In addition, the welding platform is connected by safety steel wire ropes, providing double protection for the welding platform.

[0027] 3. The steel pipes of the reinforced concrete structure are equipped with upper and lower clamping blocks. Each set of upper and lower clamping blocks can clamp and fix the steel pipes around the perimeter, which improves the stability between the welding platform and the high-performance concrete lattice column tower. It can also prevent the welding platform from falling due to unstable connection caused by long-term use or the humid environment of the valley. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the combination of the tower column, welding platform, and platform fall protection components in the structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the collar assembly of the present invention;

[0031] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of a portion of the structure at point A;

[0032] Figure 5 This is a schematic diagram of the anti-fall component of the structural platform of the present invention;

[0033] Figure 6 This is a schematic diagram of the combination of the upper clamping block and the lower clamping block in the structure of the present invention;

[0034] Figure 7 This is a top view of the tower column and welding platform of the present invention.

[0035] Figure 8 This is a static schematic diagram of the welding platform of the present invention.

[0036] Figure 9 This is a schematic diagram of the climbing mechanism of the welding platform of the present invention;

[0037] Figure 10 This is a front view of the tower column structure of the present invention;

[0038] Figure 11 For the present invention Figure 10 Enlarged schematic diagram of the structure at point B in the middle;

[0039] Figure 12 This is a partial schematic diagram of the tower column and welding platform in the structure of the present invention;

[0040] Figure 13 This is an exploded schematic diagram of the upper and lower columns of the structure of this invention;

[0041] Figure 14 This is a schematic diagram of the horizontal and vertical ear plates of the present invention.

[0042] Among them, 100 is the bridge tower; 200 is the tower column; 300 is the crossbeam; 400 is the upper tower column; 401 is the column steel pipe; 402 is the parallel web member; 403 is the vertical steel plate; 404 is the diamond-shaped steel pipe; 405 is the perforated plate; 406 is the horizontal ear plate; 407 is the vertical ear plate; 500 is the lower tower column; 600 is the welding platform; 700 is the platform anti-fall component; 701 is the collar; 702 is the cross-shaped bracket; 703 is the inner groove; 704 is the outer groove; 705 is the suspension block; 706 is the drive shaft; 707 is the T-shaped bracket; 708 is the linkage shaft; 709 is the universal joint; 710 is the upper clamping block; 711 is the lower clamping block; 712 is the anti-slip groove; and 713 is the rack. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not 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 the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0044] Please see Figures 1-14 This invention provides a technical solution: an automated welding construction method for high-performance concrete lattice column cable towers in strong wind valleys, comprising the following steps:

[0045] The first step is pre-construction preparation: Based on the tower's BIM model, the three-dimensional coordinates of the steel structure nodes and the weld type and size parameters are determined. The welds mainly include the 200mm circumferential butt joint of the tower column, the intersecting weld of the transverse web tube, and the fillet weld of the sealing plate. According to the river valley meteorological data, such as wind speed and historical temperature data, the temperature field and stress field under different welding process parameters are simulated using welding simulation software. The welding parameter library suitable for the current environment is optimized and determined, including current, voltage, welding speed, and interpass temperature control range. A special flexible track matching the weld trajectory is preset.

[0046] The second step is to accurately determine the steel structure nodes: the steel structure nodes are assembled in the factory and the nodes are decomposed into transportation units. Before or after the designated sections of the high-performance concrete lattice column are poured on site, a total station and a laser tracker are used for measurement and layout. The steel structure node units are accurately positioned in the air using a three-dimensional positioning jig, and a welding platform 600 and a special flexible track system are installed.

[0047] The third step is the hoisting of the welding platform 600 and the platform fall arrestor component 700: According to the hoisting plan for the 200-segment tower column, the 200-segment steel pipe lattice column is hoisted as a sheet unit. After being hoisted into place, it is fixed with temporary connectors. Then, the welding platform 600 and the platform fall arrestor component 700 are installed. On-site high-altitude welding is performed on the circumferential weld of the 200-segment tower column, the intersecting weld of the transverse web tubes, and the fillet weld of the sealing plate. The welding platform 600 should be windproof and rainproof. The welding platform 600 is made of steel rectangular tubes. The main columns and main crossbars are made of 100×50×4mm rectangular tubes, and the structural columns and structural crossbars are made of 40×40×4mm rectangular tubes. Each group of rectangular tubes surrounds the lattice column assembly. The structure is a frame cage with two operating platforms. The top surface of each operating platform is fully covered with steel mesh to ensure the safety of workers. Eight vertical limiting perforated plates 405 are installed between the welding platform 600 and the lattice column. The perforated plates 405 are welded to the main column of the platform, and the perforated plates 405 are pinned to the vertical ear plates 407 of the lattice column, thereby achieving temporary fixation between the welding platform 600 and the lattice column. At the same time, fireproof geotextile is laid on the bottom plate of the welding platform 600 and around the platform to prevent welding sparks from falling to the ground and causing a fire. The suspension blocks 705 on the platform anti-fall component 700, which are pre-fitted on the steel pipe 401 of the column, are connected to the welding platform 600 through connecting rods.

[0048] The fourth step is automated welding: a track-mounted welding robot is used and installed on a dedicated flexible track system. It integrates a laser vision weld seam tracking system, an arc sensing system, and an adaptive control system. The robot uses a laser vision sensor to scan the actual weld seam and compares and compensates with the theoretical trajectory in the BIM model. It automatically generates a welding path that is adapted to the actual assembly precision. During the welding process, the arc sensor monitors the state of the molten pool in real time. Combined with feedback from environmental sensors such as wind speed and temperature, and dynamic calls and fine-tuning of welding parameters such as current, voltage, welding speed, and interpass temperature in the parameter library, the welding parameters are compensated for heat loss or uneven input caused by wind disturbance and temperature difference.

[0049] The fifth step is real-time quality monitoring: During the welding process, a multi-information fusion monitoring system is used to collect welding current and voltage, molten pool images, acoustic emission signals, and environmental parameters. The algorithm model is used to make a preliminary judgment on the weld formation quality and defects. After each weld is completed, a visual inspection is carried out immediately. After all welding is completed, non-destructive testing is carried out on important welds. After the test is qualified, the welds are subjected to post-heat insulation treatment. Electric heating blankets are used in conjunction with insulation cotton, and the post-heating temperature and cooling rate are strictly controlled to further eliminate residual welding stress. Finally, the welded area is coated with anti-corrosion coating and can be put into use.

[0050] In this embodiment, a bridge tower 100 is also included. The bridge tower 100 is composed of a tower column 200 and two upper and lower crossbeams 300. The tower column 200 includes an upper tower column 400 and a lower tower column 500. The upper tower column 400 is equipped with a welding platform 600 composed of rectangular steel tubes for construction operations. The welding platform 600 is provided with a platform anti-fall component 700 to prevent the welding platform 600 from falling. An automatic welding structure is also provided on the upper tower column 400.

[0051] The upper tower column 400 includes four reinforced concrete column steel pipes 401, which are erected on the lower tower column 500. Parallel web members 402, vertical steel plates 403, and rhomboid steel pipes 404 are welded and fixed to the column steel pipes 401 respectively. The rhomboid steel pipes 404 are set in the plane of the parallel web members 402 at the upper and lower ends of the vertical steel plates 403. The column steel pipes 401, parallel web members 402, vertical steel plates 403, and rhomboid steel pipes 404 together form a spatial lattice column. Horizontal ear plates 406 and vertical ear plates 407 are welded and fixed to the surface of the lattice column. Perforated plates 405 are connected to the vertical ear plates 407 by pins, and the perforated plates 405 are welded and fixed to the main column on the welding platform 600.

[0052] Specifically, the welding platform 600 is manufactured by a specialized factory. After being fabricated in the factory, it is transported to the site for assembly. Once assembled as a whole, it is hoisted and installed using a tower crane. According to the 200-segment tower column hoisting plan, after being hoisted into place, it is secured with temporary connectors before the welding platform 600 is installed. The welding platform 600 should be windproof and rainproof. The welding platform 600 is made of rectangular steel tubing. The main columns and main crossbars are made of 100×50×4mm rectangular tubing, while the structural columns and structural crossbars are made of 40×40×4mm rectangular tubing. Each group of rectangular tubes surrounds the lattice column to form a frame cage structure, with a total of 2 operating platforms. The top surface of each operating platform is fully covered with steel mesh to ensure the safety of workers walking. Eight vertical limiting perforated plates 405 are set between the welding platform 600 and the lattice column. The perforated plates 405 are welded to the main column of the platform and pinned to the ear plate of the lattice column, thereby achieving temporary fixation between the welding platform 600 and the lattice column. At the same time, fireproof geotextile is laid on the bottom plate of the welding platform 600 and around the platform to prevent welding sparks from falling to the ground and causing a fire.

[0053] Lifting of Welding Platform 600: Four hoists are installed on the bottom operating platform of Welding Platform 600. Ear plate anchoring points are set at the top of the installed lattice columns corresponding to the main uprights. The hoist wire ropes are fixed by passing through the ear plate anchoring points. The hoist drum is used to lift Welding Platform 600 as a whole. It is required that the four hoists be controlled synchronously by a set of electrical control systems. The electrical system can be used to achieve the requirements of simultaneous control and individual control, so as to realize the overall lifting and local adjustment of the platform. During the lifting operation of Welding Platform 600, the operator must be on the maintenance platform of Bridge Tower 100 and use an external handle to control the overall lifting and lowering of the platform. During the lifting process, it is strictly forbidden for anyone to stand on the platform to operate. It is necessary to ensure that no one is on the platform during the lifting.

[0054] Fixing the welding platform 600: After the welding platform 600 is lifted to the corresponding position, the anchoring lugs (the lugs are welded on site) pre-welded to the lattice column are fixed with pins to the vertical connecting hole plate 405 on the welding platform 600, so that the welding platform 600 is temporarily connected to the installed lattice column. At the same time, the lifting system is released one by one, and the lifting anchor points are connected to the welding platform 600 with safety steel wire ropes to achieve double insurance for fixing the welding platform 600. Two anchor points are set for each section of the lattice column, for a total of eight anchor points. The lifting lugs are mainly composed of lugs with a steel plate thickness of 14mm.

[0055] Dismantling of Welding Platform 600: After the welding platform 600 is used, it is lowered section by section by a winch to the position of the lower crossbeam 300 for dismantling. First, the power supply is cut off and the main cable is removed. The platform is then anchored to the tower column 200 using pins. The platform is then hoisted using a tower crane. After the hooks are in place and the hoisting wire rope is under tension, the connecting bolts are removed and the connecting platform is dismantled.

[0056] In this embodiment, shrinkage-compensating self-compacting C80 concrete is poured into the column steel pipe 401;

[0057] Specifically, the upper tower column 400 is a high-performance concrete lattice column composed of four reinforced concrete structural steel pipes 401, parallel web members 402, vertical steel plates 403, and rhomboid steel pipes 404. The steel pipes 401 have a diameter of 960mm and a wall thickness of 24-32mm. The steel pipes 401 are filled with shrinkage-compensating self-compacting C80 concrete. All horizontal connecting pipes between the steel pipes 401 are arranged in parallel. The parallel web members 402 have a diameter of 610mm and a wall thickness of 12mm. The vertical steel plates 403 are intermittently set with a plate thickness of 14mm. Rhomboid steel pipes 404 with a diameter of 280mm and a wall thickness of 12mm are set in the plane of the parallel web members 402 at both ends of the vertical steel plates 403 to improve the strength of the concrete lattice column.

[0058] In this embodiment, the lower tower column 500 adopts a reinforced concrete structure, which is formed by a stiff frame consisting of steel pipe concrete columns and steel web members encased in C55 steel fiber concrete.

[0059] Specifically, this facilitates the improvement of the strength of the lower tower column 500 when supporting the bridge tower 100 and the bridge subgrade.

[0060] In this embodiment, the upper tower column 400 is divided into multiple segments, and the multiple segments of the upper tower column 400 are connected by horizontal ear plates 406 and pins.

[0061] Specifically, such as Figure 13 As shown, when hoisting multiple upper tower columns 400 in stages, align the horizontal ear plates 406 on the upper and lower tower columns 400, insert pins or bolts, and the upper and lower tower columns 400 can be temporarily installed and fixed.

[0062] In this embodiment, the platform fall arrestor 700 includes a collar 701, which is mounted on the upright steel pipe 401. A cross-shaped bracket 702 is welded and fixed between the collars 701. An inner groove 703 is formed on the inner surface of the collar 701, and an outer groove 704 is formed on the outer surface. A drive shaft 706 is rotatably mounted at the outer groove 704, and an inclined suspension block 705 is fixed on the drive shaft 706. A T-shaped bracket 70 is fixed inside the collar 701. 7. The bottom of the T-shaped bracket 707 has a rotating linkage shaft 708. A universal joint 709 is provided between the linkage shaft 708 and the drive shaft 706. The top of the T-shaped bracket 707 has an upper clamping block 710 that rotates through a pivot pin. A lower clamping block 711 is fixed on the linkage shaft 708. Anti-slip grooves 712 are provided on the inner surfaces of the upper clamping block 710 and the lower clamping block 711. A rack 713 is provided on the outer cylindrical ends of the upper clamping block 710 and the lower clamping block 711.

[0063] Specifically, before welding the parallel web members 402, vertical steel plates 403, rhomboid steel pipes 404, and perforated plates 405, multiple collars 701 are first fitted onto the designated positions of the column steel pipes 401, and notches are pre-drilled in the perforated plates 405. After the perforated plates 405 are welded onto the column steel pipes 401, the perforated plates 405 fit over the collars 701 through the notches, thus fixing both the perforated plates 405 and the collars 701 to the column steel pipes 401. Then, the welding platform 600 is hoisted and connected to the vertical ear plates 407 through the perforated plates 405, fixing the welding platform 600 to the column steel pipes 401. This secures the welding platform 600 to the spatial lattice column formed by the column steel pipes 401, parallel web members 402, vertical steel plates 403, and rhomboid steel pipes 404. Figure 4As shown, the suspension block 705 is connected to the welding platform 600 via a connecting rod. Specifically, both ends of the connecting rod are rotatably connected to the suspension block 705 and the welding platform 600 respectively via pivot pins. Tightening the connecting rod causes the upper clamping block 710 and the lower clamping block 711 to adhere to the surface of the column steel pipe 401 through the arc-shaped anti-slip groove 712, thus engaging the upper clamping block 710 and the lower clamping block 711 onto the column steel pipe 401. When the welding platform 600 falls downwards, the connecting rod pulls the suspension block 705 downwards. The suspension block 705 drives the drive shaft 706 to rotate. The drive shaft 706 drives the linkage shaft 708 to rotate via the universal joint 709. The linkage shaft 708 drives the lower clamping block 711 to rotate counterclockwise. Figure 5 As shown, when the lower clamping block 711 rotates counterclockwise, the meshing between the racks 713 will cause the upper clamping block 710 to rotate clockwise. Four sets of upper and lower clamping blocks 710 and 711 are arranged circumferentially along the column steel pipe 401, allowing the upper and lower clamping blocks 710 and 711 to clamp and grip the column steel pipe 401 with a rough surface in a scissor-like manner. Furthermore, the triangular anti-slip grooves 712 increase the resistance between the upper and lower clamping blocks 710 and 711 and the column steel pipe 401, making the grip more stable and effectively preventing the welding platform 600 from continuing to fall, thus improving the safety of the welding platform 600 during construction operations.

[0064] In this embodiment, the suspension block 705 is inclined outward, and the suspension block 705 is connected to the welding platform 600 through a connecting rod.

[0065] Specifically, by tilting the suspension block 705 outward and making the weight of the welding platform 600 much greater than that of the collar 701, which is fixed to the column steel pipe 401, when the welding platform 600 falls, the connecting rod connected to the welding platform 600 can more easily drive the suspension block 705 to rotate.

[0066] In this embodiment, the T-shaped bracket 707 supports the upper clamping block 710 to rotate via a pivot pin, and supports the lower clamping block 711 to rotate via a linkage shaft 708. The drive shaft 706 is connected to the linkage shaft 708 via a universal joint 709.

[0067] Specifically, the T-shaped bracket 707 allows the upper clamping block 710 and the lower clamping block 711 to be supported and rotated respectively, so that the upper clamping block 710 and the lower clamping block 711 can rotate synchronously in opposite directions through the meshing between the rack 713.

[0068] In this embodiment, the anti-slip groove 712 is a triangular groove, the anti-slip groove 712 is arc-shaped, and it is adapted to the arc-shaped surface of the column steel pipe 401. The upper clamping block 710 and the lower clamping block 711 are driven by the meshing of the rack 713.

[0069] Specifically, the arc-shaped anti-slip groove 712 allows the upper clamping block 710 and the lower clamping block 711 to fit tightly against the surface of the column steel pipe 401. The triangular anti-slip groove 712 increases the friction between the upper clamping block 710 and the lower clamping block 711 and the column steel pipe 401, making the upper clamping block 710 and the lower clamping block 711 grip more firmly. After the concrete lattice column tower is welded, the collar 701 can be cut and removed.

[0070] In this embodiment, the automatic welding structure includes a flexible track, a track-type welding robot, a laser vision weld seam tracking system, an arc sensing system, an adaptive control system, and a multi-information fusion monitoring system.

[0071] Specifically, a track-mounted welding robot is used and installed on a dedicated flexible track. It integrates a laser vision weld tracking system, an arc sensing system, and an adaptive control system. The robot uses a laser vision sensor to scan the actual weld bevel and compares and compensates it with the theoretical trajectory in the BIM model. It automatically generates a welding path that is adapted to the actual assembly precision. During the welding process, a multi-information fusion monitoring system is used to make a preliminary judgment on the weld formation quality and defects through an algorithm model, and to perform non-destructive testing on important welds.

[0072] The working principle and usage process of this invention are as follows: Before construction, based on the coordinates of the steel structure, weld type and size parameters, and historical data of valley wind speed and temperature in the BIM model of the cable tower, welding simulation software is used to simulate the process under different parameters. Then, the concrete lattice column cable tower is hoisted, and at the same time, the layout is measured and precise aerial positioning is performed. The welding platform 600 and a dedicated flexible track system are installed. After hoisting into place, temporary connectors are used for fixation. Then, the welding platform 600 and the platform fall protection component 700 are installed. The top surface of the operating platform is fully covered with steel mesh to ensure the safety of workers walking. The welding platform 600 and the lattice column cable tower are then connected. Temporary fixation between the columns is implemented, and fireproof geotextile is laid on the base plate of welding platform 600 and around the platform to prevent welding sparks from falling to the ground and causing a fire. A track-type welding robot is used and installed on a dedicated flexible track system. The robot uses a laser vision sensor to scan the actual weld seam and automatically generates a welding path that matches the actual assembly precision. This enables automatic welding and compensates for heat loss or uneven input caused by wind disturbance and temperature difference. After all welding is completed, non-destructive testing is performed on important weld seams. After passing the test, the weld seams are subjected to post-heat insulation treatment. Welding platform 600 is removed after welding is completed.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated welding construction method for high-performance concrete lattice column cable towers in strong wind valleys, characterized in that: Includes the following steps: The first step is pre-construction preparation: Based on the BIM model of the tower, the three-dimensional coordinates of the steel structure nodes and the weld type and size parameters are used. Welding simulation software is used to simulate the temperature field and stress field under different welding process parameters, optimize and determine the welding parameter library suitable for the current environment, and preset a special flexible track that matches the weld trajectory. The second step is to accurately determine the steel structure nodes: the steel structure nodes are assembled in the factory. Before or after the designated section of the high-performance concrete lattice column is poured on site, the total station and laser tracker are used to measure and lay out the structure. The steel structure node unit is accurately positioned in the air using a three-dimensional positioning jig. The welding platform (600) and a special flexible track system are installed. The third step is the hoisting of the welding platform (600) and the platform fall protection component (700): the steel pipe lattice column of the tower column (200) is hoisted as a piece unit. After being hoisted into place, it is fixed with temporary connectors. Then, the welding platform (600) and the platform fall protection component (700) are installed. The welding platform (600) is a frame cage structure composed of various rectangular tubes surrounding the lattice column. There are two operating platforms. The top surface of each operating platform is fully covered with steel plate mesh to ensure the safety of workers. The suspension block (705) on the platform fall protection component (700) that is pre-fitted on the column steel pipe (401) is connected to the welding platform (600) through the connecting rod. The fourth step is automated welding: a track-type welding robot is installed on a dedicated flexible track system, which integrates a laser vision weld seam tracking system, an arc sensing system and an adaptive control system. It automatically generates a welding path that is adapted to the actual assembly accuracy. During the welding process, the arc sensor monitors the state of the molten pool in real time and automatically compensates for heat loss or uneven input caused by wind disturbance and temperature difference. The fifth step is real-time quality monitoring: During the welding process, a multi-information fusion monitoring system is used to make a preliminary judgment on the weld formation quality and defects through an algorithm model. After the inspection is qualified, the weld is subjected to post-heat insulation treatment. Electric heating blankets are used in conjunction with insulation cotton, and the post-heat temperature and cooling rate are strictly controlled to further eliminate residual welding stress. Finally, the welded area is coated with anti-corrosion coating and can be put into use.

2. The automated welding construction method for a high-performance concrete lattice column cable tower in a strong wind valley according to claim 1, characterized in that: It also includes a bridge tower (100), which is composed of a tower column (200) and two upper and lower crossbeams (300). The tower column (200) includes an upper tower column (400) and a lower tower column (500). The upper tower column (400) is equipped with a welding platform (600) composed of rectangular steel tubes for construction operations. The welding platform (600) is equipped with a platform anti-fall component (700) to prevent the welding platform (600) from falling. An automatic welding structure is also provided on the upper tower column (400). The upper tower column (400) includes four reinforced concrete column steel pipes (401), which are erected on the lower tower column (500). Parallel web members (402), vertical steel plates (403), and rhomboid steel pipes (404) are welded and fixed on the column steel pipes (401). The rhomboid steel pipes (404) are arranged in the plane of the parallel web members (402) at the upper and lower ends of the vertical steel plates (403). The column steel pipes (401), parallel web members (402), vertical steel plates (403), and rhomboid steel pipes (404) together form a spatial lattice column. Horizontal ear plates (406) and vertical ear plates (407) are welded and fixed on the surface of the lattice column. A perforated plate (405) is connected to the vertical ear plate (407) by a pin, and the perforated plate (405) is welded and fixed to the main column on the welding platform (600).

3. The automated welding construction method for a high-performance concrete lattice column cable tower in a strong wind valley according to claim 2, characterized in that: The column steel pipe (401) is filled with self-compacting C80 concrete that compensates for shrinkage.

4. The automated welding construction method for a high-performance concrete lattice column cable tower in a strong wind valley according to claim 2, characterized in that: The lower tower column (500) adopts a reinforced concrete structure, which is formed by a stiff skeleton composed of steel pipe concrete columns and steel web members, encased in C55 steel fiber concrete.

5. The automated welding construction method for high-performance concrete lattice column cable towers in strong wind valleys according to claim 2, characterized in that: The upper tower column (400) is divided into multiple sections, which are connected by horizontal ear plates (406) and pins.

6. The automated welding construction method for a high-performance concrete lattice column cable tower in a strong wind valley according to claim 1, characterized in that: The platform fall arrestor assembly (700) includes a collar (701), which is mounted on a steel pipe column (401). A cross-shaped bracket (702) is welded and fixed between the collars (701). An inner groove (703) is opened on the inner surface of the collar (701), and an outer groove (704) is opened on the outer surface. A drive shaft (706) is rotatably mounted at the outer groove (704), and an inclined suspension block (705) is fixed on the drive shaft (706). A T-shaped bracket (707) is fixed inside the collar (701). The bottom of the T-shaped bracket (707) is rotatably connected to a linkage shaft (708), and a universal joint (709) is provided between the linkage shaft (708) and the drive shaft (706). The top of the T-shaped bracket (707) is rotatably connected to an upper clamping block (710) via a pivot pin. A lower clamping block (711) is fixed on the linkage shaft (708). Anti-slip grooves (712) are provided on the inner surfaces of both the upper clamping block (710) and the lower clamping block (711). A rack (713) is provided on the outer cylindrical ends of both the upper clamping block (710) and the lower clamping block (711).

7. The automated welding construction method for a high-performance concrete lattice column cable tower in a strong wind valley according to claim 6, characterized in that: The suspension block (705) is inclined outward and is connected to the welding platform (600) via a connecting rod.

8. The automated welding construction method for a high-performance concrete lattice column cable tower in a strong wind valley according to claim 6, characterized in that: The T-shaped bracket (707) supports the upper clamping block (710) to rotate via a pivot pin and supports the lower clamping block (711) to rotate via a linkage shaft (708). The drive shaft (706) is connected to the linkage shaft (708) via a universal joint (709).

9. The automated welding construction method for a high-performance concrete lattice column cable tower in a strong wind valley according to claim 6, characterized in that: The anti-slip groove (712) is a triangular groove. The anti-slip groove (712) is arc-shaped and adapted to the arc-shaped surface of the column steel pipe (401). The upper clamping block (710) and the lower clamping block (711) are driven by meshing through a rack (713).

10. The automated welding construction method for a high-performance concrete lattice column cable tower in a strong wind valley according to claim 6, characterized in that: The automated welding structure includes a flexible track, a track-type welding robot, a laser vision weld seam tracking system, an arc sensing system, an adaptive control system, and a multi-information fusion monitoring system.

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