An assembled platform for steel pipe lattice column installation and dismounting

Abstract

The application provides an assembled platform for steel pipe lattice column mounting and dismounting, and relates to the technical field of construction platforms. The assembled platform comprises a bearing frame, guide frames arranged on the two sides of the bearing frame, a moving frame slidingly arranged outside the guide frames, hoop structures arranged on the side walls of the moving frame, and a pushing structure arranged on the side of the bearing frame and used for slidingly pushing the moving frame. An inner frame is arranged in the bearing frame, a bearing table is vertically and slidingly arranged in the inner frame, a driving structure for driving the inner frame to move vertically is arranged on the inner side of the bearing frame, and a lifting structure for lifting the bearing table to move vertically is arranged in the inner frame. The device can be flexibly adapted to lattice type tower structure members with different cross-sectional sizes and spacings, can climb in the lattice type tower structure members, can accurately adjust the working and member transfer height, and can improve the safety and adaptability of tower installation and dismounting work.

Description

Technical Field

[0001] This invention relates to the field of construction platform technology, and more specifically, to a prefabricated platform for the installation and dismantling of steel pipe lattice columns. Background Technology

[0002] Lattice towers, a type of grid structure formed by splicing multiple members, have been widely used in various fields such as bridge cable hoisting, wind power generation, and power transmission projects due to their advantages of high load-bearing capacity, low steel consumption, good versatility, simple structure, and convenient component transportation. They are particularly suitable for areas with limited land resources and medium-to-high tower scenarios, and can flexibly adapt to the height and load requirements of different projects. As engineering construction develops towards larger and more complex directions, the height of lattice towers is constantly increasing, and the structural complexity is gradually increasing. The difficulty and safety requirements of their installation and dismantling operations are also increasing. Traditional installation and dismantling methods can no longer meet the needs of efficient, safe, and precise construction in modern engineering.

[0003] Existing installation and dismantling devices often use fixed-size clamping and support structures, making it difficult to adapt to lattice tower components with different cross-sectional dimensions and spacing. For tower components with uneven surfaces, it is even more difficult to achieve secure clamping. At the same time, most devices cannot flexibly adjust the working height and component transfer height. When dealing with tower operations at different heights and installation positions, it is necessary to replace equipment of different specifications or make complex structural adjustments. This results in poor adaptability, limited applicability, increased construction costs and operational complexity, and difficulty in meeting the diverse tower operation needs in fields such as wind power and bridges. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated platform for the installation and dismantling of steel pipe lattice columns, which addresses the shortcomings of existing technologies and solves the problems mentioned in the background.

[0005] The technical solution of this invention is implemented as follows: This invention provides an assembly platform for the installation and dismantling of steel pipe lattice columns, including a bearing frame, guide frames installed on both sides of the bearing frame, and movable frames slidably provided on the outer sides of the guide frames. Two sets of clamp structures are installed on the two opposite side walls of the movable frame. Pushing structures are installed on both sides of the support frame. The pushing structures are used to push the moving frame to slide along the extension direction of the guide frame. An inner frame is installed inside the support frame, and a support platform is slidably installed inside the inner frame along the vertical direction; The inner side of the support frame is provided with a driving structure, which is used for the inner frame to move back and forth in the vertical direction; The inner frame is equipped with a lifting structure for lifting the support platform to move vertically.

[0006] In some technical solutions of the present invention, the pushing structure includes two sets of hydraulic mechanisms arranged in pairs. The two sets of hydraulic mechanisms are respectively arranged at both ends of the same side of the support frame. The hydraulic mechanism includes two hydraulic push rods. The body of the hydraulic push rod is connected to the side wall of the support frame, and the telescopic end of the hydraulic push rod is connected to the movable frame located on the same side.

[0007] In some technical solutions of the present invention, the clamping structure includes several mounting seats installed on the outer side wall of the movable frame. Each mounting seat is rotatably provided with two mutually hinged clamping arms. The movable frame is slidably provided with a displacement seat. Two adjusting arms are hinged on the displacement seat. The two adjusting arms are respectively hinged to the two clamping arms. The displacement seat is connected to a hydraulic push rod located on the same side of the displacement seat.

[0008] In some technical solutions of the present invention, through grooves are provided on the outer side wall of the guide frame and the outer side wall of the moving frame, a limiting block is provided in the guide frame, the limiting block extends outward after passing through the through groove, and a limiting groove is provided on the top of the arm, and a portion of the limiting block is embedded in the limiting groove.

[0009] In some technical solutions of the present invention, a return spring is also included. The return spring is sleeved on the edge of the movable frame, one side of the return spring is connected to the outer wall of the edge of the movable frame, and the other side of the return spring abuts against the displacement seat.

[0010] In some technical solutions of the present invention, the driving structure includes a rack installed inside the support frame, a gear rotatably provided on the side wall of the inner frame opposite to the support frame, the gear meshing with the rack, a first drive motor connected to the gear transmission on the inner frame, and a guide structure for guiding the inner frame to move vertically between the support frame and the inner frame.

[0011] In some technical solutions of the present invention, the lifting structure includes two sets of winches, which are coaxially installed at the bottom of the inner frame. Each winch is wound with a traction rope. The top and bottom of the inner frame are provided with pulleys. The free end of the traction rope is embedded in the pulley and connected to the support platform. The inner frame is provided with a guide structure for guiding the movement of the support platform.

[0012] In some technical solutions of the present invention, the guide structure includes several mounting brackets installed around the support platform. Two first pulleys are installed on the side walls of the mounting brackets opposite to the inner frame, and the edges of the inner frame are embedded between the two first pulleys.

[0013] In some technical solutions of the present invention, the guide structure includes four retainers respectively installed on the four edges of the inner frame, and second pulleys are installed on the side walls of the retainers opposite to the support frame, and the edges of the support frame are embedded between two second pulleys.

[0014] In some technical solutions of the present invention, anti-slip pads are installed on the inner sidewalls of the arm.

[0015] Compared with the prior art, the present invention has at least the following advantages or beneficial effects: by pushing the moving frame to slide, the horizontal position of the clamping structure can be adjusted; the opening and closing degree of the clamping arm can be precisely controlled by the hydraulic push rod; the anti-slip pad can adapt to tower components with uneven surfaces; the limiting structure ensures accurate alignment of the clamping arm, making the device adaptable to lattice towers of different specifications and surface conditions; and the pushing structure allows the clamping structures located on both sides of the bearing frame 1 to open and close periodically, and then the moving frame is lifted by the pushing structure, so that the overall structure climbs along the axial direction of the tower column; the clamping structure also achieves a firm clamping of the tower components by setting anti-slip pads and limiting structures, preventing loosening during the operation of the device; the guiding structure and the guide structure respectively ensure the smooth movement of the inner frame and the bearing platform, avoiding tilting and jamming, and preventing component collision damage; mechanized operation reduces the risk of manual high-altitude operation, improves the safety of operation, and ensures the quality of tower installation and disassembly. Attached Figure Description

[0016] Figure 1 This is a front view structural schematic diagram of the assembly platform for the lattice tower in this invention.

[0017] Figure 2 This is a schematic diagram of the installation structure of the load-bearing frame, guide frame, moving frame, and clamping structure in this invention.

[0018] Figure 3 This is a bottom view of the mounting structure of the clamping structure in this invention.

[0019] Figure 4 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the combined load-bearing frame and inner frame in this invention.

[0021] Figure 6 This is a front view schematic diagram of the internal frame and support platform of the present invention.

[0022] Figure 7 This is a schematic diagram of the installation structure of the driving structure in this invention.

[0023] Reference numerals: 1-Bearing frame, 2-Guide frame, 3-Moving frame, 4-Clamping structure, 401-Mounting base, 402-Clamping arm, 403-Displacement seat, 404-Adjusting arm, 5-Pushing structure, 501-Hydraulic mechanism, 502-Hydraulic push rod, 6-Inner frame, 7-Bearing platform, 8-Drive structure, 801-Rack, 802-Gear, 803-First drive motor, 9-Lifting structure, 901-Windlass, 902-Traction rope, 903-Pulley, 10-Through groove, 11-Limiting block, 12-Limiting groove, 13-Reset spring, 14-Guiding structure, 1401-Retainer, 1402-Second pulley, 15-Guiding structure, 1501-Mounting bracket, 1502-First pulley, 16-Anti-slip mat. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] Example 1 This invention provides a prefabricated platform for the installation and dismantling of steel pipe lattice columns, such as... Figures 1-7 As shown, the device includes a support frame 1, which serves as the mounting base for the entire device and provides a stable support for all components. Guide frames 2 are symmetrically installed on both sides of the support frame 1. The guide frames 2 extend vertically, and movable frames 3 are slidably mounted on their outer sides. The movable frames 3 can slide freely along the extension direction of the guide frames 2, enabling horizontal position adjustment.

[0027] Two sets of clamping structures 4 are installed on the two opposite side walls of the movable frame 3. The clamping structures 4 are used to clamp the lattice tower components to achieve a firm connection between the device and the tower. Pushing structures 5 are installed on both sides of the bearing frame 1. The pushing structures 5 are used to drive the movable frame 3 to slide along the extension direction of the guide frame 2, thereby adjusting the alignment position of the clamping structures 4 and the tower.

[0028] An inner frame 6 is installed inside the support frame 1. The inner frame 6 can move back and forth along the vertical direction of the support frame 1. A support platform 7 is slidably installed inside the inner frame 6 along the vertical direction. The support platform 7 is used to place tower structure components to be installed or disassembled components, realizing temporary support and transfer of components. A drive structure 8 is provided on the inner side of the support frame 1. The drive structure 8 is used to drive the inner frame 6 to move back and forth along the vertical direction, realizing the adjustment of the working height. A lifting structure 9 is provided inside the inner frame 6. The lifting structure 9 is used to drive the support platform 7 to move along the vertical direction, realizing the lifting and transfer of components.

[0029] The pushing structure 5 includes two sets of hydraulic mechanisms 501 arranged in pairs. The two sets of hydraulic mechanisms 501 are respectively set at both ends of the same side of the bearing frame 1 to ensure that the moving frame 3 is subjected to uniform force. Each set of hydraulic mechanisms 501 includes two hydraulic push rods 502. The body of the hydraulic push rod 502 is fixedly connected to the side wall of the bearing frame 1, and the telescopic end of the hydraulic push rod 502 is fixedly connected to the moving frame 3 located on the same side. Through the telescopic movement of the hydraulic push rod 502, the moving frame 3 is driven to slide along the guide frame 2 to realize the alignment adjustment of the clamp structure 4.

[0030] The clamping structure 4 includes several mounting seats 401 installed on the outer side wall of the movable frame 3. The mounting seats 401 are evenly distributed on the side wall of the movable frame 3. Each mounting seat 401 is rotatably equipped with two hinged arms 402. The two arms 402 can open and close around the hinge point and the mounting seat 401 to clamp or release the tower structure components. A displacement seat 403 is slidably provided on the inner side of the movable frame 3. The displacement seat 403 can slide along the extension direction of the movable frame 3. Two adjusting arms 404 are hinged on the displacement seat 403. The two adjusting arms 404 are respectively hinged to the two arms 402 to form a linkage transmission structure. The displacement seat 403 is also connected to a hydraulic push rod 502 located on the same side. The hydraulic push rod 502 drives the displacement seat 403 to slide, thereby driving the arms 402 to open and close.

[0031] Furthermore, through grooves 10 are provided on the outer side wall of the guide frame 2 and the outer side wall of the moving frame 3. A limiting block 11 is provided inside the guide frame 2. The limiting block 11 extends outward after passing through the through groove 10. A limiting groove 12 is provided on the top of the arm 402. The limiting block 11 is partially embedded in the limiting groove 12 to form a sliding fit, which is used to limit the rotation trajectory of the arm 402 and ensure that the arm 402 opens and closes accurately and smoothly.

[0032] Meanwhile, this device also includes a return spring 13, which is sleeved on the edge of the moving frame 3. One side of the return spring 13 is fixedly connected to the outer wall of the edge of the moving frame 3, and the other side abuts against the displacement seat 403. It is used to assist the displacement seat 403 in resetting and to buffer the sliding of the displacement seat 403, so as to avoid the displacement seat 403 sliding too fast and causing impact. In addition, anti-slip pads 16 are installed on the inner side wall of the clamping arm 402. The anti-slip pads 16 are made of elastic material with a high coefficient of friction. They are used to increase the friction between the clamping arm 402 and the tower structure components, improve the clamping firmness, and at the same time prevent the clamping arm 402 from hard contacting and damaging the surface of the tower structure components.

[0033] The drive structure 8 includes a rack 801 mounted inside the support frame 1, which is fixed vertically. A gear 802 is rotatably mounted on the side wall of the inner frame 6 opposite to the support frame 1. The gear 802 meshes with the rack 801 to form a gear 802 rack 801 transmission structure. A first drive motor 803 is mounted on the inner frame 6 and is connected to the gear 802. The first drive motor 803 provides power for the rotation of the gear 802, converting the rotational motion of the first drive motor into the linear motion of the inner frame 6. A guide structure 14 is provided between the support frame 1 and the inner frame 6 to guide the inner frame 6 to move vertically and limit the horizontal displacement of the inner frame 6.

[0034] The guide structure 14 includes four retainers 1401 respectively installed on the four edges of the inner frame 6. Second pulleys 1402 are installed on the side wall of the retainer 1401 opposite to the support frame 1. The edges of the support frame 1 are embedded between two second pulleys 1402. When the inner frame 6 moves vertically, the second pulleys 1402 and the edges of the support frame 1 roll and rub against each other, reducing the resistance to movement and ensuring that the inner frame 6 moves smoothly, avoiding tilting or jamming.

[0035] The lifting structure 9 includes two sets of winches 901, which are coaxially mounted in the middle area of ​​the bottom of the inner frame 6. The two winches 901 move synchronously, tractioning the sliding support platform 7 with balanced force. Each winch 901 is wound with a traction rope 902. A pulley 903 is located at the top of the inner frame 6. The free end of the traction rope 902 passes over the pulley 903 and is fixedly connected to the support platform 7. The pulley 903 changes the direction of force on the traction rope 902, converting the rotational power of the winches 901 into the vertical lifting power of the support platform 7. The inner frame 6 has a guide structure 15 to guide the movement of the support platform 7, ensuring smooth lifting and lowering of the support platform 7.

[0036] The guide structure 15 includes several mounting brackets 1501 installed around the support platform 7. Each mounting bracket 1501 has two first pulleys 1502 installed on its side wall opposite to the inner frame 6. The edge of the inner frame 6 is embedded between the two first pulleys 1502. When the support platform 7 is raised or lowered, the first pulleys 1502 roll into contact with the edge of the inner frame 6, reducing motion resistance and limiting the horizontal displacement of the support platform 7, thus preventing the support platform 7 from tilting or swaying.

[0037] The implementation process of this device mainly includes four steps: device alignment and fixing, working height adjustment, component transfer, and work reset, as detailed below: The first step is to align and fix the device. Move the device to the working position on the lattice tower frame, and activate the hydraulic mechanisms 501 on both sides of the bearing frame 1. The two hydraulic push rods 502 in each hydraulic mechanism 501 extend and retract synchronously. The extension and retraction ends of the hydraulic push rods 502 drive the moving frame 3 on the same side to slide along the extension direction of the guide frame 2, adjusting the horizontal position of the moving frame 3 so that the clamping structure 4 on the moving frame 3 aligns with the preset clamping position of the tower frame component. When the moving frame 3 is adjusted to the designated position, when the hydraulic push rod 502, which is connected to the displacement seat 403, is activated, the extension and retraction ends of the hydraulic push rod 502 retract into its body, pulling the displacement seat 403 to slide along the moving frame 3. The displacement seat 403 drives the two adjusting arms 404 to move. The adjusting arms 404 pull the two hinged clamping arms 402 to rotate around the mounting base 401, bringing the two clamping arms 402 closer together until the anti-slip pad 16 on the inner side of the clamping arms 402 is tightly fitted with the surface of the tower frame component, thus achieving proper alignment between the device and the tower. The frame is firmly fixed, and the telescopic end of the hydraulic push rod 502 retracts into its body, pulling the displacement seat 403 to a predetermined position. The limiting block 11 on the guide frame 2 is embedded in the limiting groove 12 at the top of the clamping arm 402, and slides with the rotation of the clamping arm 402, limiting the rotation trajectory of the clamping arm 402 and ensuring that the clamping arm 402 is clamped accurately. At the same time, the displacement seat 403 compresses the return spring 13, causing the return spring 13 to undergo elastic deformation and store elastic potential energy, which plays a buffering role in the sliding of the displacement seat 403.

[0038] Conversely, when the telescopic end of the hydraulic push rod 502 moves into its body, the two clamping arms 402 move away from each other, releasing the clamping action. After the telescopic end of the hydraulic push rod 502 continues to move into its body, it can lift the moving frame along the axial direction of the tower column, thereby realizing the climbing movement of the entire structure.

[0039] The second step is adjusting the working height. Start the first drive motor 803 on the inner frame 6. The first drive motor 803 drives the gear 802 to rotate. Since the gear 802 meshes with the rack 801 on the inner side of the support frame 1, the gear 802 moves vertically along the rack 801 as it rotates, thereby driving the inner frame 6 to move vertically along the support frame 1. During the movement of the inner frame 6, the second pulleys 1402 of the retainers 1401 on the four edges of the inner frame 6 roll into contact with the edges of the support frame 1, guiding the inner frame 6 to move smoothly in the vertical direction, preventing the inner frame 6 from tilting or jamming, until the inner frame 6 is adjusted to the required installation or disassembly height. Then, turn off the first drive motor 803, and the inner frame 6 remains fixed.

[0040] The third step is the component transfer operation. After the inner frame 6 is adjusted to the designated height, the tower structure component to be installed or the disassembled component is placed on the support platform 7. The two sets of winches 901 on both sides of the bottom of the inner frame 6 are activated. The winches 901 rotate synchronously and wind the traction rope 902. The traction rope 902 changes the direction of force through the pulley 903 at the top of the inner frame 6, pulling the support platform 7 vertically upward along the inner frame 6, raising the component to the required working height, and completing the lifting and transfer of the component. When it is necessary to lower the component, the winches 901 rotate in the opposite direction to release the traction rope 902. Under the action of its own weight and the weight of the component, the support platform 7 descends vertically along the inner frame 6 until the component is placed in the designated position. During this process, the first pulley 1502 on the mounting brackets 1501 around the support platform 7 rolls in contact with the edges of the inner frame 6, guiding the support platform 7 to rise and fall smoothly, avoiding tilting or swaying of the support platform 7, and preventing collision damage to the component.

[0041] Step 4, Reset Operation. After the installation or dismantling operation is completed, the structures are reset by reversing the operation: the winch 901 is started to release the traction rope 902, causing the support platform 7 to descend to the bottom of the inner frame 6; the first drive motor 803 is started to rotate in the reverse direction, driving the inner frame 6 to descend along the support frame 1 to the initial position; the hydraulic push rod 502, which is connected to the displacement seat 403, extends and retracts in the reverse direction, releasing the thrust on the displacement seat 403, and the reset spring 13 releases its elastic potential energy, pushing the displacement seat 403 to slide in the reverse direction, which in turn drives the adjusting arm 404 to rotate in the reverse direction, causing the two clamping arms 402 to separate from each other and loosen the tower structure components; finally, the hydraulic mechanisms 501 on both sides of the support frame 1 extend and retract in the reverse direction, driving the moving frame 3 to slide and reset along the guide frame 2, completing the entire operation process.

[0042] Example 2 Based on Example 1, the hydraulic mechanisms 501 on both sides of the support frame 1 and the clamping structure 4 on the same side can work together to achieve the overall structure climbing along the axial direction of the tower column. The movement process is as follows: When the telescopic end of the hydraulic mechanism 501 located at the lower end of the bearing frame 1 is in the retracted state, the two clamping arms 402 in the clamping structure 4 connected to it move closer to each other to clamp the tower column, making the entire construction platform suspended between the tower columns. Subsequently, when the telescopic end of the hydraulic mechanism 501 located at the upper end of the bearing frame 1 is in the extended state, the two clamping arms 402 in the clamping structure 4 connected to it move away from each other to release the clamping action on the tower column. At the same time, after the telescopic end of the hydraulic mechanism 501 continues to move out of the body of the hydraulic push rod 502, it drives the moving frame 3 to slide along the guide frame 2, causing the moving frame 3 to climb a certain distance. When the telescopic end of the hydraulic mechanism 501 located at the upper end of the bearing frame 1 is in the retracted state, the two clamping arms 402 in the clamping structure 4 connected to it move closer to each other to clamp the tower column; at this time, the bearing frame 1 The telescopic end of the lower hydraulic mechanism 501 moves out of its body, releasing the clamping of the two arms 402. Then the lower movable frame 3 slides back to its original position along the height direction of the guide frame 2, thereby changing the horizontal height of the construction platform. In this way, the hydraulic mechanism 501 and the clamping structure 4 on both sides of the load-bearing frame 1 move back and forth alternately to realize the climbing work of the construction platform.

[0043] Preferably, the clamp structure 4 located at the lower end of the bearing frame 1 can be set at the bottom of the inner frame 6.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A prefabricated platform for the installation and dismantling of steel pipe lattice columns, characterized in that, It includes a support frame, with guide frames installed on both sides of the support frame, and a movable frame slidably provided on the inner side of each guide frame; Two sets of clamp structures are installed on the two opposite side walls of the movable frame. Pushing structures are installed on both sides of the bearing frame. The pushing structures are used to push the moving frame to slide along the extension direction of the guide frame. An inner frame is installed inside the support frame, and a support platform is slidably provided in the inner frame along the vertical direction. The inner side of the support frame is provided with a driving structure, which is used for the inner frame to move back and forth in the vertical direction; The inner frame is equipped with a lifting structure for lifting the support platform to move vertically.

2. The prefabricated platform for installing and dismantling steel pipe lattice columns according to claim 1, characterized in that, The pushing structure includes two sets of hydraulic mechanisms arranged in pairs, which are respectively located at both ends of the same side of the support frame. Each hydraulic mechanism includes two hydraulic push rods. The body of the hydraulic push rod is connected to the side wall of the support frame, and the telescopic end of the hydraulic push rod is connected to the movable frame located on the same side. The hydraulic push rod is connected to the clamping structure for transmission.

3. The prefabricated platform for installing and dismantling steel pipe lattice columns according to claim 2, characterized in that, The clamp structure includes several mounting seats installed on the outer wall of the movable frame. Each mounting seat is rotatably provided with two hinged arms. The movable frame is slidably provided with a displacement seat. Two adjusting arms are hinged on the displacement seat. The two adjusting arms are respectively hinged to the two clamping arms. The displacement seat is connected to a hydraulic push rod located on the same side.

4. The prefabricated platform for installing and dismantling steel pipe lattice columns according to claim 3, characterized in that, Through slots are provided on the outer side wall of the guide frame and the outer side wall of the movable frame. A limiting block is provided inside the guide frame. The limiting block extends outward after passing through the through slot. A limiting groove is provided on the top of each arm. A portion of the limiting block is embedded in the limiting groove.

5. A prefabricated platform for installing and dismantling steel pipe lattice columns according to claim 3 or 4, characterized in that, It also includes a return spring, which is sleeved on the edge of the movable frame. One side of the return spring is connected to the outer wall of the edge of the movable frame, and the other side of the return spring abuts against the displacement seat.

6. A prefabricated platform for installing and dismantling steel pipe lattice columns according to any one of claims 1-4, characterized in that, The drive structure includes a rack installed inside the support frame, a gear rotatably mounted on the side wall of the inner frame opposite to the support frame, the gear meshing with the rack, a first drive motor connected to the gear transmission on the inner frame, and a guide structure for guiding the inner frame to move vertically between the support frame and the inner frame.

7. A prefabricated platform for installing and dismantling steel pipe lattice columns according to claim 6, characterized in that, The lifting structure includes two sets of winches, which are coaxially mounted at the bottom of the inner frame. Each winch is wound with a traction rope. The top and bottom of the inner frame are equipped with pulleys. The free end of the traction rope is wound around the pulley and connected to the support platform. The inner frame is equipped with a guide structure for guiding the movement of the support platform.

8. A prefabricated platform for installing and dismantling steel pipe lattice columns according to claim 7, characterized in that, The guide structure includes several mounting brackets installed around the support platform. Each mounting bracket has two first pulleys installed on its side wall opposite to the inner frame. The edge of the inner frame is embedded between the two first pulleys.

9. A prefabricated platform for installing and dismantling steel pipe lattice columns according to claim 6, characterized in that, The guiding structure includes four retainers respectively installed on the four edges of the inner frame. The retainers are equipped with second pulleys on the side walls opposite to the support frame, and the edges of the support frame are embedded between two second pulleys.

10. A prefabricated platform for installing and dismantling steel pipe lattice columns according to claim 3, characterized in that, Anti-slip pads are installed on the inner side walls of the arm.

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