A prestressed cable anchoring device for a wind power concrete tower

Abstract

The present application relates to the technical fields of anchoring device, and discloses a prestressed cable anchoring device for wind power concrete tower, which comprises a fixing ring, and further comprises: a locking part installed on the fixing ring; a plurality of limiting parts, wherein the plurality of limiting parts are all arranged on the fixing ring; the locking part comprises a rotating assembly installed on the fixing ring; two limiting assemblies, wherein the two limiting assemblies are both arranged on the fixing ring; and the rotating assembly comprises a connecting rod fixedly connected to the top of the fixing ring. The locking part is arranged to solve the problems of poor wear resistance, lack of multiple protection and limiting design, insufficient anchoring stability under long-term operation, high failure risk, easy early aging of the device, short overall service life and difficulty in meeting the use requirements of long-term reliable anchoring of the wind tower steel wire rope.

Description

Technical Field

[0001] This invention relates to the field of anchoring device technology, specifically to a prestressed cable anchoring device for a wind power concrete tower. Background Technology

[0002] The prestressed cables of wind turbine concrete towers are steel strand bundles made of multiple high-strength steel wires, evenly arranged along the vertical circumference of the tower. They are the core load-bearing and strengthening components of the tower. The tower is tall and subjected to significant wind and vibration loads. The concrete itself has weak tensile strength and is prone to tensile stress under wind loads, which can cause cracking and deformation of the tower wall. After the prestressed cables are installed, continuous prestress can be applied to the tower concrete to offset the tensile stress generated by external wind loads and vibrations, restrain the formation of cracks in the tower wall, and improve the overall rigidity, wind and earthquake resistance, and structural durability of the tower. The anchoring device is a key load-bearing and fixing component of the prestressed cables. It is set at the fixed end at the top of the tower and the tensioning end at the bottom of the tower. It can reliably clamp and lock the two ends of the prestressed cables, evenly transmit and diffuse the prestress generated by the tensioning of the cables to the tower concrete structure, and at the same time limit the position of the prestressed cables to prevent slippage, retraction, and loosening.

[0003] However, existing anchoring devices have poor wear resistance, lack multiple protective limit designs, insufficient anchoring stability under long-term operation, high risk of failure, and are prone to premature wear and aging, resulting in a short overall service life. They are difficult to meet the requirements for long-term reliable anchoring of steel wire ropes in wind turbine towers. Summary of the Invention

[0004] The purpose of this invention is to provide a prestressed cable anchoring device for wind turbine concrete towers. By setting a locking part, it solves the problems of existing anchoring devices, such as poor wear resistance, lack of multiple protective limit designs, insufficient anchoring stability under long-term operation, high failure risk, premature wear and aging of the device, short overall service life, and difficulty in meeting the long-term reliable anchoring requirements of steel wire ropes in wind turbine towers.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a prestressed cable anchoring device for a wind turbine concrete tower, comprising a fixed ring, and further comprising: a locking part mounted on the fixed ring; a plurality of limiting parts, all of which are disposed on the fixed ring; the locking part comprising a rotating assembly mounted on the fixed ring; and two limiting components, both of which are disposed on the fixed ring; the rotating assembly comprising a connecting rod fixedly connected to the top of the fixed ring, the outer wall of the connecting rod being rotatably connected to a turntable, the outer wall of the connecting rod rotating... A second turntable is connected. Both the first and second turntables are provided with several matching slots. Several first fixing plates pass through the first and second turntables. The first fixing plates are located in the matching slots. A tension member is provided on the first fixing plate. Both the first and second turntables are provided with five matching slots, and the first fixing plates are provided with five. The matching slots and the first fixing plates are arranged in a circumferential array around the connecting rod. The tension member includes a steel wire rope fixedly connected to the inner wall of the first fixing plates. The semi-conical plate is adapted to the steel wire rope. The steel wire rope passes through the fixing ring, the first turntable, and the second turntable.

[0006] Furthermore, the limiting part includes an adapter component, which is mounted on the fixing ring; and a pulling component, of which two are provided, and the two pulling components are disposed on the adapter component.

[0007] Furthermore, the limiting component includes a hinge block fixedly connected to turntable two, a hinge rod hinged to the side of the hinge block away from turntable one, a fixing plate two fixedly connected to the outer wall of the fixing ring, a slide rod passing through the fixing plate two, a fixing plate three fixedly connected to the rear side of the slide rod, a spring one sleeved on the outer wall of the slide rod, the rear side of the spring one fixedly connected to the fixing plate three, the front side of the spring one fixedly connected to the fixing plate two, a limiting member provided on the slide rod, a threaded groove provided in the front half of the slide rod, and the limiting member including a limiting block threadedly connected to the outer wall of the slide rod, the limiting block being hexagonal in shape.

[0008] Furthermore, the adapter component includes a conical groove formed on the fixing ring, and two semi-conical plates are provided in the conical groove. The inner walls of the two semi-conical plates are provided with friction elements. The conical groove is adapted to the semi-conical plates. The friction elements include two locking teeth provided on the inner walls of the two semi-conical plates, and the locking teeth are in contact with the wire rope.

[0009] Furthermore, the pulling assembly includes placement slots formed on the adjacent sides of two semi-conical plates. A fixing rod is fixedly connected to the inner wall of each of the two placement slots. Two hollow rods are sleeved on the outer wall of each of the two fixing rods. An elastic element is provided within each of the two placement slots, and the fixing rods are confined within the hollow rods. The elastic element includes a second spring sleeved on the outer wall of the fixing rod. The left and right sides of the second spring extend into the two placement slots respectively, and the left and right sides of the second spring are fixedly connected to the two placement slots respectively. After installation, the second spring is in a compressed state.

[0010] The present invention has the following beneficial effects: 1. This invention, by setting a locking part, first uses the clamping teeth to initially clamp and fix the wire rope. Addressing the problems of wire rope slippage, tooth wear, and decreased clamping friction caused by long-term wear of the clamping teeth, this invention adds an adapter groove, a first fixing plate, a first turntable, and a second turntable. After the wire rope is fixed, the first fixing plate is embedded into the adapter groove, and then the first and second turntables are rotated in the opposite direction to engage with the first limiting fixing plate, forming a secondary locking constraint on the wire rope and preventing slippage due to tooth wear. Simultaneously, it works in conjunction with a hinge block, hinge rod, second fixing plate, sliding rod, third fixing plate, spring one, and limiting block. The locking mechanism consists of several steps. First, pulling the fixed plate three causes the slide rod to compress the spring one and slide to avoid it. Then, pressing the hinge rod completes the locking. After releasing the fixed plate three, the spring one rebounds and causes the slide rod to reset, passing through the hinge rod and the fixed plate two, thus achieving the initial limiting of the hinge rod. Finally, the limiting block is tightened by screwing in the thread to axially lock the slide rod, firmly restricting the accidental swing of the hinge rod and preventing the fixed plate one from loosening and failing due to accidental rotation of the turntable. This improves the long-term stability, wear resistance, and anti-loosening performance of the wire rope anchoring, significantly reducing the risk of anchoring failure during long-term use and extending the service life of the device.

[0011] 2. This invention, by setting a limiting part, first inserts the end of the wire rope through the conical groove. By pulling apart the two sets of semi-conical plates, the semi-conical plates drive the fixing rod to slide within the hollow rod and stretch the second spring, reserving space for the semi-conical plates to be fitted. After the wire rope is fitted onto the outer wall, the semi-conical plates are released. The rebound force of the second spring drives the two semi-conical plates to automatically close towards each other, so that the teeth on the semi-conical plates fit together and press the wire rope tightly. Then, the wire rope is pulled downwards, using the space between the conical groove and the semi-conical plates. The inclined planes work together to continuously compress the semi-conical plate as the wire rope moves downward, further tightening it. This increases the interlocking friction between the teeth and the wire rope, creating a self-locking clamping mechanism that tightens as it is pulled. The openable structure of the semi-conical plate facilitates quick installation and removal of the wire rope, making it suitable for rapid on-site installation. The overall structure has strong self-locking properties and provides uniform and stable clamping, effectively preventing the wire rope from loosening or slipping, and improving the overall load-bearing capacity and usability of the anchoring structure.

[0012] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is a partial cross-sectional schematic diagram of the limiting component of the present invention; Figure 4 This is a partial cross-sectional view of the limiting part of the present invention; Figure 5 This is a partial cross-sectional schematic diagram of the pulling component of the present invention; Figure 6 This is a partial cross-sectional schematic diagram of the rotating assembly of the present invention; Figure 7 For the present invention Figure 2 A magnified structural diagram of A in the middle; Figure 8 For the present invention Figure 1 A magnified structural diagram of B in the diagram; Figure 9 For the present invention Figure 5 A magnified structural diagram of C.

[0015] The attached diagram lists the components represented by each number as follows: In the diagram: 111, fixed ring; 2, locking part; 21, rotating assembly; 211, connecting rod; 212, turntable one; 213, turntable two; 214, adapter groove; 215, fixed plate one; 216, wire rope; 22, limiting assembly; 221, hinge block; 222, hinge rod; 223, fixed plate two; 224, slide rod; 225, fixed plate three; 226, spring one; 227, limiting block; 3, limiting part; 31, adapter assembly; 311, conical groove; 312, semi-conical plate; 313, locking tooth; 32, pulling assembly; 321, placement groove; 322, fixed rod; 323, hollow rod; 324, spring two. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-9 As shown, the present invention is a prestressed cable anchoring device for a wind power concrete tower, including a fixing ring 111, and further including: a locking part 2, which is installed on the fixing ring 111; and a limiting part 3, which is provided in a plurality of ways, and all of the limiting parts 3 are provided on the fixing ring 111. Locking part 2 includes a rotating assembly 21, which is mounted on a fixed ring 111; and two limiting assemblies 22, both of which are mounted on the fixed ring 111. The rotating assembly 21 includes a connecting rod 211 fixedly connected to the top of the fixed ring 111. A turntable 1 212 is rotatably connected to the outer wall of the connecting rod 211, and a turntable 213 is rotatably connected to the outer wall of the connecting rod 211. Both the turntable 1 212 and the turntable 213 have several fitting slots 214. Several fixing plates 215 are threaded through 213, and the fixing plates 215 are located in several fitting slots 214. Tensioning components are provided on the fixing plates 215. Both turntable 212 and turntable 213 have five fitting slots 214, and the fixing plates 215 have five fitting slots. The fitting slots 214 and fixing plates 215 are arranged in a circular array around the connecting rod 211. The tensioning components include steel wire ropes 216 fixedly connected to the inner walls of the fixing plates 215. A semi-conical plate 312 is fitted with the steel wire rope 216. A wire rope 216 passes through a fixed ring 111, a first turntable 212, and a second turntable 213. A limiting assembly 22 includes a hinge block 221 fixedly connected to the second turntable 213. A hinge rod 222 is hinged to the side of the hinge block 221 away from the first turntable 212. A second fixing plate 223 is fixedly connected to the outer wall of the fixed ring 111. A sliding rod 224 passes through the second fixing plate 223. A third fixing plate 225 is fixedly connected to the rear side of the sliding rod 224. A first spring 226 is sleeved on the outer wall of the sliding rod 224. The rear side of the first spring 226 is connected to the third fixing plate 225. 25. Fixed connection: The front side of spring 226 is fixedly connected to fixed plate 223. A limiting component is provided on slide rod 224. The front half of slide rod 224 is provided with a threaded groove. The limiting component includes a limiting block 227 threadedly connected to the outer wall of slide rod 224. The limiting block 227 is hexagonal in shape. By setting the locking part 2, the fixed plate 2 is prevented from loosening and failing due to accidental rotation of the turntable. The overall long-term stability, wear resistance and anti-loosening performance of the wire rope anchoring are improved, the risk of anchoring failure during long-term use is greatly reduced and the service life of the device is extended.

[0018] The limiting part 3 includes an adapter component 31, which is mounted on the fixing ring 111; and a pulling component 32, of which two are provided, each mounted on the adapter component 31. The adapter component 31 includes a conical groove 311 formed on the fixing ring 111, within which two semi-conical plates 312 are provided. The inner walls of each semi-conical plate 312 are provided with friction elements. The conical groove 311 is adapted to the semi-conical plates 312. The friction elements include two locking teeth 313 provided on the inner walls of the two semi-conical plates 312, which contact the wire rope 216. The pulling component 32 includes placement grooves 321 formed on the sides of the two semi-conical plates 312 that are close to each other. The wall is fixedly connected with a fixing rod 322. Two hollow rods 323 are sleeved on the outer wall of the two fixing rods 322. Elastic elements are provided in the two placement slots 321. The fixing rods 322 are restricted in the hollow rods 323. The elastic elements include a second spring 324 sleeved on the outer wall of the fixing rods 322. The left and right sides of the second spring 324 extend into the two placement slots 321 respectively. The left and right sides of the second spring 324 are fixedly connected to the two placement slots 321 respectively. After installation, the second spring 324 is in a compressed state. By setting the limiting part 3, it is suitable for rapid on-site installation. The overall structure has strong self-locking and uniform and stable clamping, effectively preventing the wire rope from loosening and slipping, and improving the overall load-bearing capacity and usability of the anchoring structure.

[0019] In use, first pass the end of the wire rope 216 through the conical groove 311, then fit the two semi-conical plates 312 onto the outer wall of the wire rope 216. When fitting, the two semi-conical plates 312 need to be pulled apart first. When pulled apart, the semi-conical plates 312 will slide within the hollow rod 323, carrying the two fixing rods 322. When the two fixing rods 322 extend, the second spring 324 will be stretched. After the semi-conical plates 312 are pulled apart and fitted onto the outer wall of the wire rope 216, then the semi-conical plates 312 are released. At this time, the second spring 324 will pull the two semi-conical plates 312 closer together through the placement groove 321, and then move with the movement... The locking teeth 313 on the movable semi-conical plate 312 will contact the wire rope 216, and then pull the wire rope 216 downward. At this time, the wire rope 216 will carry the semi-conical plate 312 downward. As it moves, the semi-conical plate 312 will extend into the conical groove 311. As it is pulled, the conical groove 311 will be inclined with the semi-conical plate 312, so that the two semi-conical plates 312 will move closer to each other. When the semi-conical plates 312 move closer to each other, the friction of the locking teeth 313 on the wire rope 216 will also increase. Thus, they can be pulled closer and closer, thereby achieving the effect of fixing the wire rope 216. After the wire rope 216 is fixed, the long-term wear of the locking teeth 313 will cause the wire rope 216 to slip. During repeated slippage, the locking teeth 313 will be worn flat, thus greatly reducing the friction. Therefore, after fixing, the fixing plate 215 at the end of the wire rope 216 is inserted into the corresponding adapter slot 214. Then, turntables 212 and 213 are rotated in opposite directions. After rotation, turntables 212 and 213 will be locked onto the fixing plate 215, further limiting the fixing plate 215 and the wire rope 216 and preventing the wire rope 216 from shifting. Then, the hinge rod 222 is pressed down. At this time, the hinge rod 222 will change angle on the hinge block 221. When pressing, the fixing plate 225 needs to be pulled first. At this time, the fixing plate 225 will pull the sliding rod 224. Sliding on the second fixed plate 223, the first spring 226 will be stretched during the sliding process. As the movement progresses, the slide rod 224 will disengage from the second fixed plate 223. At this time, the hinge rod 222 will be locked onto the second fixed plate 223, and the third fixed plate 225 will be released. The first spring 226 will then pull the third fixed plate 225 and the slide rod 224 back to their original positions. During the reset, the slide rod 224 will pass through the hinge rod 222 and the second fixed plate 223, thus initially limiting the hinge rod 222. Subsequently, the limiting block 227 will be installed on the slide rod 224 by thread and the limiting block 227 will be tightened. This will limit the hinge rod 222 and prevent the turntable 212 from rotating unexpectedly, which could cause the first fixed plate 215 to loosen.

[0020] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A prestressed cable anchoring device for a wind turbine concrete tower, comprising a fixing ring (111), characterized in that, Also includes: Locking part (2), said locking part (2) is mounted on fixing ring (111); A limiting part (3) is provided, and a plurality of the limiting parts (3) are provided on the fixing ring (111); The locking part (2) includes a rotating assembly (21) mounted on a retaining ring (111); and Two limiting components (22) are provided, and both limiting components (22) are provided on the fixing ring (111); The rotating assembly (21) includes a connecting rod (211) fixedly connected to the top of the fixed ring (111). The outer wall of the connecting rod (211) is rotatably connected to a turntable one (212), and the outer wall of the connecting rod (211) is rotatably connected to a turntable two (213). The turntable one (212) and the turntable two (213) are respectively provided with a plurality of adapter slots (214). The turntable one (212) and the turntable two (213) are penetrated by a plurality of fixing plates one (215). The plurality of fixing plates one (215) are respectively located in the plurality of adapter slots (214). The fixing plates one (215) are provided with tension members. Among them, there are five adapter slots (214) on turntable one (212) and turntable two (213), and five fixing plates one (215). The adapter slots (214) and fixing plates one (215) are arranged in a circular array around the connecting rod (211).

2. The prestressed cable anchoring device for a wind power concrete tower according to claim 1, characterized in that, The limiting part (3) includes an adapter component (31) which is mounted on the retaining ring (111); and Pulling component (32), two of which are provided, and the two pulling components (32) are provided on the adapter component (31).

3. The prestressed cable anchoring device for a wind power concrete tower according to claim 1, characterized in that, The limiting component (22) includes a hinge block (221) fixedly connected to turntable two (213). A hinge rod (222) is hinged to the side of the hinge block (221) away from turntable one (212). A fixing plate two (223) is fixedly connected to the outer wall of the fixing ring (111). A slide rod (224) passes through the fixing plate two (223). A fixing plate three (225) is fixedly connected to the rear side of the slide rod (224). A spring one (226) is sleeved on the outer wall of the slide rod (224). The rear side of the spring one (226) is fixedly connected to the fixing plate three (225). The front side of the spring one (226) is fixedly connected to the fixing plate two (223). A limiting member is provided on the slide rod (224). The front half of the slide bar (224) is provided with a threaded groove.

4. The prestressed cable anchoring device for a wind power concrete tower according to claim 2, characterized in that, The adapter component (31) includes a conical groove (311) formed on the fixing ring (111), and two semi-conical plates (312) are provided in the conical groove (311), and the inner walls of the two semi-conical plates (312) are provided with friction elements. The conical groove (311) is adapted to the semi-conical plate (312).

5. The prestressed cable anchoring device for a wind power concrete tower according to claim 2, characterized in that, The pulling assembly (32) includes a placement groove (321) opened on one side of two semi-conical plates (312) close to each other. The inner walls of the two placement grooves (321) are fixedly connected with fixing rods (322). The outer walls of the two fixing rods (322) are fitted with two hollow rods (323). The two placement grooves (321) are provided with elastic elements. The fixed rod (322) is confined within the hollow rod (323).

6. The prestressed cable anchoring device for a wind power concrete tower according to claim 1, characterized in that, The tension member includes a steel wire rope (216) fixedly connected to the inner wall of a plurality of fixed plates (215), and the semi-conical plate (312) is adapted to the steel wire rope (216); Among them, the wire rope (216) passes through the fixed ring (111), turntable one (212) and turntable two (213).

7. The prestressed cable anchoring device for a wind power concrete tower according to claim 3, characterized in that, The limiting element includes a limiting block (227) threadedly connected to the outer wall of the slide bar (224); Among them, the constraint block (227) is hexagonal in shape.

8. The prestressed cable anchoring device for a wind power concrete tower according to claim 4, characterized in that, The friction element includes two locking teeth (313) disposed on the inner walls of the two semi-conical plates (312); Among them, the tooth (313) is in contact with the wire rope (216).

9. A prestressed cable anchoring device for a wind power concrete tower according to claim 5, characterized in that, The elastic element includes a second spring (324) sleeved on the outer wall of the fixed rod (322). The left and right sides of the second spring (324) extend into two placement slots (321) respectively. The left and right sides of the second spring (324) are fixedly connected to the two placement slots (321) respectively. Among them, after installation, the second spring (324) is in a compressed state.

Images