Steel strand pulling equipment for wind power concrete tower drum and pulling method of steel strand pulling equipment

Abstract

The invention discloses wind power concrete tower drum steel strand pulling equipment and a pulling method thereof, and relates to the technical field of wind power tower drum construction.The wind power concrete tower drum steel strand pulling equipment comprises a steel base and further comprises a displacement mechanism and a hoisting rapid butt joint and separation mechanism, and the displacement mechanism is slidably connected to the interior of the steel base; the hoisting rapid butt joint and separation mechanism is fixedly connected to the top of the displacement mechanism, and the strand penetrating mechanism is fixedly connected to the middle position of the surface of the steel base. By arranging the displacement mechanism, stable supporting of the tower top and flexible adjustment of the gravity center are achieved, automatic locking and falling prevention of hoisting are achieved through a mechanical linkage structure, the operation safety is effectively improved, meanwhile, a traditional ground strand penetrating mode is changed, a traction tool is integrated on the tower top, dependence on the length of a steel wire rope and ground facilities is reduced, and the working efficiency is improved. The transportation and arrangement cost is reduced, the construction problem of complex terrains is solved, and the strand pulling efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of wind turbine tower construction technology, specifically to a wind turbine concrete tower steel strand threading device and its threading method. Background Technology

[0002] With the continuous development of wind power generation technology, the height and scale of wind turbine towers are constantly increasing, and concrete towers are widely used due to their excellent mechanical properties and cost advantages. In the construction of wind turbine concrete towers, the threading of prestressed steel strands is a crucial construction step. Its purpose is to apply prestress to the tower structure by tensioning the steel strands, thereby improving the tower's crack resistance and load-bearing capacity. To adapt to the needs of different heights and environments, construction equipment is gradually developing towards integration and automation to ensure construction quality and efficiency.

[0003] However, the existing construction of wind turbine concrete tower steel strand strands is usually carried out on the ground, requiring the use of traction steel wire ropes twice the length of the tower body, along with a large number of ground guidance facilities. This not only leads to high equipment transportation and deployment costs, but also makes it difficult to carry out operations in complex terrain, resulting in low efficiency. On the other hand, during the hoisting process, the locking and unlocking of the lifting equipment of the existing tower top hoisting equipment often relies on manual operation, which poses a risk of high-altitude disengagement due to hooks not being locked or misoperation, resulting in poor safety. In addition, after the equipment is in place on the tower top, there is a lack of flexible fine-tuning and stabilization mechanisms, making it difficult to effectively fix it according to the height and position of different stranding holes, and the stranding accuracy is easily affected by shaking. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing wind power concrete tower steel strand threading equipment, which relies on ground operations, resulting in a large demand for traction ropes, high deployment costs, poor adaptability to complex terrain, insufficient safety during high-altitude hoisting, and lack of a stable fine-tuning mechanism after the tower top is in place.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wind power concrete tower steel strand threading device, comprising a steel base, and further comprising: A displacement mechanism, which is slidably connected to the interior of a steel base; A quick-connection and disconnection mechanism for hoisting is fixedly connected to the top of the displacement mechanism; A threading mechanism is fixedly connected to the middle position of the surface of the steel base.

[0006] Furthermore, the displacement mechanism includes: A set of symmetrical hydraulic push rods are fixedly connected to the inside of the structural groove in the middle of the steel base. Sliding grooves are opened on both sides of the structural grooves. The sliding grooves are connected to a set of symmetrical through grooves on the surface of the steel base. A set of drive rods, the middle of which is fixedly connected to the telescopic end of the hydraulic push rod, and the two ends of the drive rods extend through the slide groove into the interior of the through groove. The fixed bases are respectively fixedly connected to both ends of the drive rod, and the fixed bases are respectively located inside the through groove.

[0007] Furthermore, an electric jack is fixedly connected to the bottom of the fixed base, and each of the electric jacks is movably mounted with casters. The fixed base has limit plates installed on its front and rear sides via a rotating shaft and a torque spring. The limit plates have concave arc and convex arc shapes on opposite sides, respectively, to fit the inner and outer shapes of the wind turbine concrete tower.

[0008] Furthermore, transmission ropes are fixedly connected to the opposite sides of the limiting plates on both sides of the fixed base; The electric jack has a set of symmetrical guide wheels installed on its outer side. The end of the transmission rope away from the limiting plate slides through the guide wheels and is fixedly connected to the output end of the electric jack.

[0009] Furthermore, the lifting quick docking and disengagement mechanism includes: A hook is fixedly connected to the surface of a fixed base. The hook has a wire-locking groove inside, and a connecting rod is fixedly connected to the top of the wire-locking groove. The top of the connecting rod passes through the hook and is slidably connected to it. A return spring is sleeved on the outside of the connecting rod, and the return spring is located on the opposite side of the wire-locking groove and the hook. The locking block has an inclined inner side and a T-shaped slide bar fixedly connected to its bottom. The front end of the hook has a slot that matches the locking block. The surface of the fixing base has a groove that matches the slide bar. The locking block is slidably connected to the fixing base through the slide bar and the groove.

[0010] Furthermore, the lifting quick docking and disengagement mechanism also includes: The transmission block is inclined inside, and its inclination direction is opposite to that of the locking block. The transmission block and the locking block are in close contact with each other. The hook has a connecting groove at one end near the fixed base, and a fixed rod is fixedly connected to the side of the transmission block away from the locking block. The fixed rod extends through the connecting groove and is fixedly connected to an L-shaped transmission bar on its outer side. The top end of the transmission bar is fixedly connected to the top end of the connecting rod.

[0011] Furthermore, the threading mechanism includes: Mounting base, which is fixedly connected to the middle position of the steel base; The steering shaft is divided into inner and outer sleeves, which are rotatably connected, and the outer sleeve is fixedly connected to the surface of the mounting base. An extension arm, one end of which is welded to the top of the inner sleeve, and a telescopic support rod is fixedly connected to the end of the extension arm away from the inner sleeve. Four guide pulleys are installed on the surface of the steel base, inside the inner sleeve, and at both ends of the surface of the extension arm.

[0012] Furthermore, the threading device also includes: A winch is mounted on the surface of a steel base. A traction wire rope is wound around the output end of the winch, and the end of the traction wire rope away from the winch slides sequentially through the hubs of four guide pulleys and extends downward from the telescopic support rod.

[0013] A method for threading steel strands in a wind turbine concrete tower includes the following steps: S1. First, start the hydraulic push rod in the displacement mechanism. The hydraulic push rod drives the fixed seat to slide in the groove of the steel base through the drive rod. By adjusting the position of the fixed seat, the overall center of gravity and lifting point position of the equipment can be adjusted to meet the balance requirements of different working conditions. Then, hang the hoisting rope of the crane in the hook of the quick docking and disengagement mechanism. S2. When the crane starts the lifting equipment, the lifting rope applies an upward pulling force to the wire locking groove inside the hook. This pulling force causes the connecting rod to overcome the elastic force of the return spring and slide outward relative to the hook. The movement of the connecting rod drives the fixed rod to move upward in the connecting groove through the L-shaped transmission bar, thereby driving the transmission block to move upward synchronously. Since the contact surface between the transmission block and the locking block is inclined, the upward movement of the transmission block will squeeze the locking block, causing it to slide forward in the sliding groove through the T-shaped slide bar until the locking block is locked into the locking groove at the front end of the hook. At this time, a closed structure is formed inside the hook, realizing the rapid connection and anti-derailment locking of the lifting rope, ensuring the safety of lifting. S3. After the equipment is hoisted to the top of the wind turbine concrete tower, the prestressed steel strand is threaded through the prestressed steel strand at the bottom of the tower. The winch is started to release the traction steel wire rope. Guided by multiple guide pulleys, the traction steel wire rope passes through the threading hole of the transition section from top to bottom and finally extends to the doorway at the bottom of the tower. One end of the prestressed steel strand is connected to the traction steel wire rope through the traction net sleeve. Then, the winch is started in reverse to wind up the traction steel wire rope. Under the drive of the guide pulleys, the traction steel strand passes through the threading hole of the steel transition section and is anchored. Then, the other end is threaded and anchored at the hollow foundation to complete the threading process. S4. When it is necessary to operate the bottom of the tower or the through holes at different heights, start the hydraulic push rod to push the drive rod to slide in the slide groove, and move the fixed seat to the solid position at the top of the wind power concrete tower. Then, start the electric jack and push the moving wheel down until it is in close contact with the surface of the tower top. As the electric jack continues to lift, the moving wheel acts as a fulcrum to lift the steel base upward, so that it separates from the contact surface of the tower top or adjusts the height, so that the equipment can be moved on the tower top or the working angle can be adjusted. S5. While the electric jack pushes the moving wheel downward, its output end pulls the transmission rope. The transmission rope bypasses the guide wheel and changes the direction of the force, thereby pulling the limiting plate to overcome the elastic force of the torque spring at the shaft and causing it to flip to the opposite side. When the limiting plate flips to the vertical state, its concave arc or convex arc surface is tightly fitted with the inner or outer wall of the wind power concrete tower. The reset force of the torque spring achieves auxiliary limiting and clamping of the equipment on the tower surface, preventing the equipment from shifting when turning.

[0014] Compared with existing technologies, the present wind power concrete tower steel strand threading device and its threading method have the following advantages: I. This invention achieves stable support and flexible fine-tuning of the equipment at the top of the tower through a displacement mechanism. A hydraulic push rod drives the fixed base to slide along a groove, allowing for convenient adjustment of the equipment's center of gravity and lifting point position according to actual working conditions, ensuring balanced hoisting. When the equipment is in place, an electric jack pushes out a moving wheel as a fulcrum, moderately lifting the steel base to adjust its height or facilitate movement. Simultaneously, the output end retracts and pulls the transmission rope, causing the arc-shaped limiting plate, conforming to the inner and outer shapes of the tower, to automatically flip and press against the tower wall. Through multi-point support and the clamping force of the torque spring, the invention effectively prevents the equipment from shaking or shifting during the threading operation, ensuring construction stability.

[0015] Second, this invention achieves automatic locking and anti-detachment during high-altitude hoisting through a designed quick-connection and detachment mechanism, significantly improving operational safety. The design, utilizing the coordinated hook, locking block, transmission block, and return spring, leverages the tension of the hoisting rope itself as the driving force to automatically trigger the locking block to engage in the slot, forming a closed connection. This allows for rapid locking of the lifting equipment without additional manual operation. Once the equipment is in place and unloaded, the return spring automatically unlocks the equipment, achieving a mechanical linkage structure that locks upon application of force and detaches upon release of force. This effectively avoids the risk of high-altitude detachment caused by unlocked hooks or human error during traditional hoisting processes, greatly improving the safety factor and construction efficiency of high-altitude wind turbine tower operations.

[0016] Third, this invention changes the traditional ground-based strand threading operation mode by setting up a strand threading mechanism. The traction tool is directly integrated on the top of the tower, which greatly reduces the construction difficulty and equipment requirements. Compared with the traditional tool, which requires strand threading on the ground, and whose traction wire rope length is not only twice the height of the tower body, but also requires multiple cumbersome guidance, this invention integrates the winch, steering shaft, extension arm and guide pulley on the steel base, so that the equipment can directly perform suspended strand threading operations on the top of the wind turbine concrete tower. Thus, only a traction wire rope of one tower body height or less is needed to complete the lifting and threading of the steel strand, reducing the dependence on the length of the wire rope and the number of ground guidance facilities, significantly reducing the transportation and deployment costs of the equipment, and solving the problem of difficult ground strand threading operations in complex terrain, thus improving the overall strand threading efficiency.

[0017] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the displacement mechanism structure of the present invention; Figure 4 This is a schematic diagram of the electric jack connection structure of the present invention; Figure 5 This is a schematic diagram of the lifting and quick docking / undocking mechanism of the present invention; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the threading mechanism of the present invention.

[0019] In the diagram: 1. Steel base; 2. Displacement mechanism; 201. Hydraulic push rod; 202. Drive rod; 203. Fixed seat; 204. Electric jack; 205. Moving wheel; 206. Limit plate; 207. Transmission rope; 208. Guide wheel; 3. Quick-connection and disconnection mechanism for hoisting; 301. Hook; 302. Cable slot; 303. Connecting rod; 304. Return spring; 305. Locking block; 306. Sliding bar; 307. Transmission block; 308. Fixed rod; 309. Transmission bar; 4. Cable threading mechanism; 401. Mounting seat; 402. Steering shaft; 403. Extension arm; 404. Guide pulley; 405. Winch; 406. Traction wire rope; 407. Telescopic support rod; 5. Slide groove. Detailed Implementation

[0020] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1-7 As shown, the present invention provides a technical solution: a wind power concrete tower steel strand threading device, including a steel base 1, and further comprising: Displacement mechanism 2 is slidably connected to the inside of steel base 1; The quick-connection and disconnection mechanism 3 is fixedly connected to the top of the displacement mechanism 2. The threading device 4 and the threading mechanism are fixedly connected to the middle position of the surface of the steel base 1.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the displacement mechanism 2 includes a set of symmetrical hydraulic push rods 201. The hydraulic push rods 201 are fixedly connected to the inside of the structural groove in the middle of the steel base 1. The two sides of the structural groove are provided with sliding grooves 5. The sliding grooves 5 are connected to a set of symmetrical through grooves on the surface of the steel base 1. By setting the hydraulic push rods 201 in conjunction with the drive rods 202, the fixed seat 203 can be driven to slide in the sliding grooves 5, thereby conveniently adjusting the center of gravity and lifting point position of the equipment according to the actual working conditions to ensure the lifting balance. A set of drive rods 202 are fixedly connected to the telescopic ends of hydraulic push rods 201 in the middle, and the two ends of the drive rods 202 extend through the slide grooves 5 into the interior of the through groove. Fixed seats 203 are fixedly connected to the two ends of the drive rods 202 and located inside the through groove. An electric jack 204 is fixedly connected to the bottom of the fixed seat 203, and a movable wheel 205 is movably installed on the bottom of the electric jack 204. When it is necessary to operate the bottom of the tower or the through holes at different heights, the electric jack 204 is started to push the movable wheel 205 downward until it is in close contact with the top surface of the tower. As the lifting continues, the movable wheel 205 acts as a fulcrum to lift the steel base 1 upward, so that it separates from the contact surface of the top of the tower or adjusts the height, so that the equipment can move on the top of the tower or adjust the working angle. The fixed base 203 has limit plates 206 mounted on its front and rear sides via rotating shafts and torque springs. The opposite sides of the limit plates 206 are respectively concave and convex arc-shaped to conform to the inner and outer shapes of the wind turbine concrete tower. Drive ropes 207 are fixedly connected to the opposite sides of the limit plates 206 on both sides of the fixed base 203. A set of symmetrical guide wheels 208 are installed on the outer side of the electric jack 204. The end of the drive rope 207 away from the limit plates 206 slides through the guide wheels 208 and is fixedly connected to the output end of the electric jack 204. While pushing the moving wheel 205 downward, its output end pulls the transmission rope 207. The transmission rope 207 bypasses the guide wheel 208 to change the direction of the force, thereby pulling the limiting plate 206 to overcome the elastic force of the torque spring at the shaft and flip it to the opposite side. When the limiting plate 206 flips to the vertical state, its concave arc or convex arc surface is tightly attached to the inner or outer wall of the wind power concrete tower. The reset force of the torque spring realizes the auxiliary limiting and clamping of the equipment on the tower surface, effectively preventing the equipment from shaking and displacing during the threading operation or turning, and ensuring the stability of the construction.

[0023] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the hoisting quick docking and disengagement mechanism 3 includes a hook 301, which is fixedly connected to the surface of the fixed base 203. The hook 301 has a wire-locking groove 302 inside, and a connecting rod 303 is fixedly connected to the top of the wire-locking groove 302. The top of the connecting rod 303 passes through the hook 301 and is slidably connected to it. A return spring 304 is sleeved on the outside of the connecting rod 303, and the return spring 304 is located on the opposite side of the wire-locking groove 302 and the hook 301. By hanging the hoisting rope of the crane in the hook 301, the tension of the hoisting rope itself drives the connecting rod 303 to overcome the elastic force of the return spring 304 and slide outward relative to the hook 301, thereby providing power for automatic locking. The inner side of the locking block 305 is inclined, and a T-shaped slide bar 306 is fixedly connected to its bottom. The front end of the hook 301 has a slot, which is adapted to the locking block 305. The surface of the fixing base 203 has a slide groove 5, which is adapted to the slide bar 306. The locking block 305 is slidably connected to the fixing base 203 through the slide bar 306 and the slide groove 5.

[0024] The quick-connection and disconnection mechanism 3 also includes a transmission block 307. The transmission block 307 is inclined inside, and its inclination direction is opposite to that of the locking block 305. The transmission block 307 and the locking block 305 fit together. The end of the hook 301 near the fixed base 203 has a connecting groove 302. A fixed rod 308 is fixedly connected to the side of the transmission block 307 away from the locking block 305. The fixed rod 308 extends through the connecting groove 302 and is fixedly connected to an L-shaped transmission strip 309 on its outer side. The top end of the transmission strip 309 is fixedly connected to the top end of the connecting rod 303. When the connecting rod 303 slides, the L-shaped transmission strip 309 drives the fixed rod 308 in the connecting groove 302. The internal displacement of the 2nd part drives the transmission block 307 to move upward synchronously. Utilizing the inclined surface of the contact surface between the transmission block 307 and the locking block 305, the locking block 305 is squeezed and slides forward in the slide groove 5 through the T-shaped slide bar 306 until the locking block 305 is engaged in the slot at the front end of the hook 301. This creates a closed structure inside the hook 301, enabling rapid connection and anti-detachment locking of the hoisting rope. This effectively avoids the risk of high-altitude detachment caused by the hook 301 not being locked or human error during traditional hoisting processes, significantly improving operational safety. After the equipment is in place and unloaded, it automatically unlocks under the action of the return spring 304, greatly improving the efficiency of high-altitude operations on wind turbine towers.

[0025] like Figure 1 , Figure 2 and Figure 7 As shown, the threading device 4 includes a mounting base 401, which is fixedly connected to the middle position of the steel base 1. The steering shaft 402 is divided into inner and outer sleeves, which are rotatably connected. The outer sleeve is fixedly connected to the surface of the mounting base 401. One end of the extension arm 403 is welded to the top of the inner sleeve, and the end of the extension arm 403 away from the inner sleeve is fixedly connected to a telescopic support rod 407. Through the cooperation of the steering shaft 402 and the extension arm 403, the angle and position of the extension arm 403 can be flexibly adjusted, so that the device can directly perform suspended threading operations on the top of the wind power concrete tower, changing the traditional ground threading operation mode. Four guide pulleys 404 are respectively installed on the surface of the steel base 1, inside the inner sleeve, and at both ends of the surface of the extension arm 403. The threading device 4 also includes a winch 405, which is installed on the surface of the steel base 1. The output end of the winch 405 is wound with a traction wire rope 406, and the end of the traction wire rope 406 away from the winch 405 slides sequentially through the hubs of the four guide pulleys 404 and extends downward from the telescopic support rod 407. After the equipment is hoisted to the top of the wind turbine concrete tower, the winch 405 is started to release the traction wire rope 406. Guided by the multiple guide pulleys 404, the traction wire rope 406 passes from top to bottom through the threading holes of the transition section, and finally extends to the doorway at the bottom of the tower. One end of the prestressed steel strand is connected to the traction wire rope 406 through the traction net sleeve. Then the winch is started in reverse. The winch 405 winds up the traction wire rope 406. Under the drive of the guide pulley 404, the traction steel strand passes through the threading hole of the steel conversion section and is anchored. Then, the other end is threaded and anchored at the hollow support platform to complete the threading process. Compared with the disadvantages of traditional tooling that requires threading on the ground, and that the traction wire rope 406 must be twice the height of the tower and require multiple cumbersome guidance, this invention integrates the winch 405, steering shaft 402, extension arm 403 and guide pulley 404 on the steel base 1. Only a traction wire rope 406 of one tower height or shorter is needed to complete the lifting and threading of the steel strand. This reduces the dependence on the length of the wire rope and the number of ground guidance facilities, significantly reducing the transportation and deployment costs of the equipment. At the same time, it solves the problem of difficult ground threading operations in complex terrain and improves the overall threading efficiency.

[0026] A method for threading steel strands in a wind turbine concrete tower includes the following steps: S1. First, start the hydraulic push rod 201 in the displacement mechanism 2. The hydraulic push rod 201 drives the fixed seat 203 to slide in the slide groove 5 of the steel base 1 through the drive rod 202. By adjusting the position of the fixed seat 203, the overall center of gravity and lifting point position of the equipment can be adjusted to meet the balance requirements of different working conditions. Then, hang the hoisting rope of the crane in the hook 301 of the hoisting quick docking and disengagement mechanism 3. S2. When the crane starts the lifting equipment, the lifting rope applies an upward pulling force to the wire locking groove 302 inside the hook 301. This pulling force drives the connecting rod 303 to slide outward relative to the hook 301, overcoming the elastic force of the return spring 304. The movement of the connecting rod 303 drives the fixed rod 308 to move upward in the connecting groove 302 through the L-shaped transmission bar 309, thereby driving the transmission block 307 to move upward synchronously. Since the contact surface between the transmission block 307 and the locking block 305 is inclined, the upward movement of the transmission block 307 will squeeze the locking block 305, causing it to slide forward in the sliding groove 5 through the T-shaped slide bar 306 until the locking block 305 is locked into the slot at the front end of the hook 301. At this time, a closed structure is formed inside the hook 301, realizing the rapid docking and anti-detachment locking of the lifting rope, ensuring the safety of the lifting. S3. After the equipment is hoisted to the top of the wind turbine concrete tower and positioned, the prestressed steel strand is threaded through the prestressed steel strand through the threading hole of the transition section. The winch 405 is started to release the traction steel wire rope 406. The traction steel wire rope 406 is guided by multiple guide pulleys 404 and passes through the threading hole of the transition section from top to bottom, eventually extending to the doorway at the bottom of the tower. One end of the prestressed steel strand is connected to the traction steel wire rope 406 through the traction net sleeve. Then, the winch 405 is started in reverse to wind up the traction steel wire rope 406. Under the drive of the guide pulleys 404, the traction steel strand passes through the threading hole of the steel transition section and is anchored. Then, the other end is threaded and anchored at the hollow foundation to complete the threading process. S4. When it is necessary to operate the bottom of the tower or the through holes at different heights, start the hydraulic push rod 201, push the drive rod 202 to slide in the slide groove 5, and drive the fixed seat 203 to move to the solid position at the top of the wind power concrete tower. Then, start the electric jack 204 and push the moving wheel 205 down until it is in close contact with the top surface of the tower. As the electric jack 204 continues to lift, the moving wheel 205 acts as a fulcrum to lift the steel base 1 upward, so that it separates from the contact surface of the top of the tower or adjusts the height, so that the equipment can move on the top of the tower or adjust the working angle. S5. While the electric jack 204 pushes the moving wheel 205 downward, its output end pulls the transmission rope 207. The transmission rope 207 passes around the guide wheel 208 to change the direction of the force, thereby pulling the limiting plate 206 to overcome the elastic force of the torque spring at the shaft and make it flip to the opposite side. When the limiting plate 206 flips to the vertical state, its concave arc or convex arc surface is tightly attached to the inner or outer wall of the wind power concrete tower. The reset force of the torque spring realizes the auxiliary limiting and clamping of the equipment on the tower surface, preventing the equipment from shifting when turning.

[0027] It should be noted that in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for 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 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 "fixed," "installed," "connected," and "linked" should be interpreted broadly. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "linked" can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] 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. A wind turbine concrete tower steel strand threading device, comprising a steel base (1), characterized in that: Also includes: Displacement mechanism (2), which is slidably connected to the inside of steel base (1); The hoisting quick docking and disengagement mechanism (3) is fixedly connected to the top of the displacement mechanism (2); The threading device (4) is fixedly connected to the middle position of the surface of the steel base (1).

2. The wind power concrete tower steel strand threading device and method according to claim 1, characterized in that: The displacement mechanism (2) includes: A set of symmetrical hydraulic push rods (201) are fixedly connected to the inside of the structural groove in the middle position of the steel base (1), and sliding grooves (5) are opened on both sides of the structural groove. The sliding grooves (5) are connected to a set of symmetrical through grooves on the surface of the steel base (1). A set of drive rods (202) are fixedly connected in the middle to the telescopic end of the hydraulic push rod (201), and the two ends of the drive rods (202) extend through the slide groove (5) into the inside of the through groove. The fixed base (203) is fixedly connected to both ends of the drive rod (202), and the fixed base (203) is located inside the through groove.

3. The wind power concrete tower steel strand threading device according to claim 2, characterized in that: The bottom of the fixed base (203) is fixedly connected to an electric jack (204), and the bottom of the electric jack (204) is movably installed with casters (205). Among them, the front and rear sides of the fixed seat (203) are equipped with limit plates (206) through a rotating shaft and a torque spring. The limit plates (206) have concave arc and convex arc on opposite sides, respectively, to fit the inner and outer shapes of the wind power concrete tower.

4. The wind power concrete tower steel strand threading device according to claim 3, characterized in that: A transmission rope (207) is fixedly connected to the opposite sides of the limiting plates (206) on both sides of the fixed base (203). The electric jack (204) has a set of symmetrical guide wheels (208) installed on its outer side. The end of the transmission rope (207) away from the limiting plate (206) slides through the guide wheels (208) and is fixedly connected to the output end of the electric jack (204).

5. The wind power concrete tower steel strand threading device according to claim 1, characterized in that: The hoisting quick docking and disengagement mechanism (3) includes: A hook (301) is fixedly connected to the surface of a fixed base (203). The hook (301) has a wire-locking groove (302) inside, and a connecting rod (303) is fixedly connected to the top of the wire-locking groove (302). The top of the connecting rod (303) passes through the hook (301) and is slidably connected to it. A return spring (304) is sleeved on the outside of the connecting rod (303), and the return spring (304) is located on the opposite side of the wire-locking groove (302) and the hook (301). The locking block (305) is inclined on its inner side. A T-shaped slide bar (306) is fixedly connected to the bottom of the locking block (305). A slot is provided at the front end of the hook (301), and the slot is adapted to the locking block (305). A sliding groove (5) is provided on the surface of the fixing base (203), and the sliding groove (5) is adapted to the slide bar (306). The locking block (305) is slidably connected to the fixing base (203) through the slide bar (306) and the sliding groove (5).

6. The wind power concrete tower steel strand threading device according to claim 5, characterized in that: The lifting quick docking and disengagement mechanism (3) also includes: The transmission block (307) is inclined inside, and its inclination direction is opposite to that of the locking block (305). The transmission block (307) and the locking block (305) fit together. The hook (301) has a connecting groove (302) at one end near the fixed base (203). The transmission block (307) is fixedly connected to a fixed rod (308) on the side away from the lock block (305). The fixed rod (308) extends through the connecting groove (302) and is fixedly connected to an L-shaped transmission bar (309) on its outer side. The top end of the transmission bar (309) is fixedly connected to the top end of the connecting rod (303).

7. The wind power concrete tower steel strand threading device according to claim 1, characterized in that: The threading device (4) includes: Mounting base (401), which is fixedly connected to the middle position of the steel base (1); Steering shaft (402), the steering shaft (402) is divided into inner and outer sleeves, and the inner and outer sleeves are connected by rotation, and the outer sleeve is fixedly connected to the surface of the mounting base (401); An extension arm (403) is provided, one end of which is welded to the top of the inner sleeve, and a telescopic support rod (407) is fixedly connected to the end of the extension arm (403) away from the inner sleeve. Four guide pulleys (404) are respectively installed on the surface of the steel base (1), inside the inner sleeve, and at both ends of the surface of the extension arm (403).

8. The wind power concrete tower steel strand threading device according to claim 7, characterized in that: The threading device (4) also includes: A winch (405) is mounted on the surface of a steel base (1). The output end of the winch (405) is wound with a traction wire rope (406), and the end of the traction wire rope (406) away from the winch (405) slides sequentially through the hubs of four guide pulleys (404) and extends downward from the telescopic support rod (407).

9. A method for threading steel strands in a wind turbine concrete tower, characterized in that, A wind power concrete tower steel strand threading device according to any one of claims 1-8 comprises the following steps: S1. First, start the hydraulic push rod (201) in the displacement mechanism (2). The hydraulic push rod (201) drives the fixed seat (203) to slide in the groove (5) of the steel base (1) through the drive rod (202). By adjusting the position of the fixed seat (203), the center of gravity and lifting point position of the equipment can be adjusted to meet the balance requirements of different working conditions. Then, hang the hoisting rope of the crane in the hook (301) of the hoisting quick docking and disengagement mechanism (3). S2. When the crane starts the lifting equipment, the lifting rope applies an upward pulling force to the wire locking groove (302) inside the hook (301). This pulling force drives the connecting rod (303) to slide outward relative to the hook (301) against the elastic force of the return spring (304). The movement of the connecting rod (303) drives the fixed rod (308) to move upward in the connecting groove (302) through the L-shaped transmission bar (309), thereby driving the transmission block (307) to move upward synchronously. Since the contact surface between the transmission block (307) and the locking block (305) is inclined, the upward movement of the transmission block (307) will squeeze the locking block (305), causing it to slide forward in the slide groove (5) through the T-shaped slide bar (306) until the locking block (305) is locked into the slot at the front end of the hook (301). At this time, a closed structure is formed inside the hook (301), realizing the rapid docking and anti-derailment locking of the lifting rope, ensuring the safety of the lifting. S3. After the equipment is hoisted to the top of the wind power concrete tower, the threading equipment (4) is operated to perform the threading operation. The winch (405) is started to release the traction wire rope (406). The traction wire rope (406) is guided by multiple guide pulleys (404) and passes through the threading hole of the conversion section from top to bottom. Finally, it extends to the doorway at the bottom of the tower. One end of the prestressed steel strand is connected to the traction wire rope (406) through the traction net sleeve. Then, the winch (405) is started in the opposite direction to wind up the traction wire rope (406). Under the transmission of the guide pulleys (404), the traction steel strand passes through the threading hole of the steel conversion section and is anchored. Then, the other end is threaded and anchored at the cavity platform to complete the threading process. S4. When it is necessary to operate the bottom of the tower or the through holes at different heights, start the hydraulic push rod (201) and push the drive rod (202) to slide in the slide groove (5), which will drive the fixed seat (203) to move to the solid position at the top of the wind power concrete tower. Then, start the electric jack (204) and push the moving wheel (205) down until it is in close contact with the top surface of the tower. As the electric jack (204) continues to lift, the moving wheel (205) acts as a fulcrum to lift the steel base (1) upward, so that it is separated from the contact surface of the top of the tower or the height is adjusted, so that the equipment can move or adjust the working angle at the top of the tower. S5. While the electric jack (204) pushes the moving wheel (205) downward, its output end pulls the transmission rope (207). The transmission rope (207) passes around the guide wheel (208) to change the direction of the force, thereby pulling the limiting plate (206) to overcome the elastic force of the torque spring at the shaft and make it flip to the opposite side. When the limiting plate (206) flips to the vertical state, its concave arc or convex arc surface is tightly attached to the inner or outer wall of the wind power concrete tower. The reset force of the torque spring realizes the auxiliary limiting and clamping of the equipment on the tower surface, preventing the equipment from shifting when turning.

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