A method for integral hoisting construction of wind power towers

Abstract

This invention discloses a method for the overall hoisting and construction of a wind turbine tower, belonging to the technical field of wind turbine towers. The specific steps include: pouring a foundation for the wind turbine tower at the installation location; sequentially hoisting and placing multiple columns and wind turbines to be installed onto a supporting unit, and then assembling them; using a hoisting unit to rotate the supporting unit and the multiple columns and wind turbines; after the hoisting unit rotates the assembled columns and wind turbines to a predetermined position, the columns are slowly lowered with the assistance of a crane until the bolts are inserted into the flange, and the nuts are initially tightened accordingly; then the verticality of the columns is corrected, and after correction, the nuts are tightened again; grouting is performed at the bottom of the columns so that the wind turbine tower foundation is embedded in the grout, and then the nuts are finally tightened. This method reduces the difficulty of assembly work and ensures a relatively secure connection between the columns and the wind turbine tower foundation.

Description

Technical Field

[0001] This invention relates to the field of wind power tower technology, specifically to a method for the overall hoisting and construction of a wind power tower. Background Technology

[0002] A wind turbine is a system that converts the kinetic energy of wind into electrical energy. A wind turbine consists of a rotor and a generator; the rotor comprises blades, a hub, and reinforcing components; it generates electricity through the rotation of the blades under wind power and the rotation of the generator head. A wind power source consists of the wind turbine, the tower supporting the generator, a battery charging controller, an inverter, a load unloader, a grid connection controller, and a battery bank. The tower primarily serves a supporting role in the wind turbine and also absorbs vibrations. Precast concrete wind turbine towers are typically frustum-shaped structures with equal taper, the angle between the tower wall and the central axis being approximately 2.5°. The concrete tower is composed of several sections, with an overall height reaching approximately 160 meters, and radial variations at the top and bottom exceeding 4 meters. Wind power, as a relatively pollution-free and renewable energy source, has a promising future. Wind turbines are typically installed on a column tens or even nearly a hundred meters high, with the overall weight reaching hundreds of tons, making installation quite challenging.

[0003] For example, Chinese invention patent CN112664034A discloses an overall installation method for a wind power tower, which includes assembling the column and wind turbine on the ground, pouring an installation platform at the installation location, embedding a pin seat on the upper part of the installation platform, inserting a pin between the end of the column away from the wind turbine and the pin seat, so that the column can rotate around the position where the pin is inserted, connecting the wire rope of the lifting device to the end of the column where the wind turbine is installed, fixing a wire rope at the end of the column where the wind turbine is installed, hooking the hook of the crane onto the wire rope for auxiliary lifting, after the crane vertically lifts the end of the column where the wind turbine is installed to the predetermined position, operating the lifting device to continue to drive the end of the column where the wind turbine is installed to rise until the column is vertical, then connecting the flange welded to the bottom of the column and the flange welded to the installation platform, and pouring cement into the gap between the bottom of the column and the installation platform.

[0004] The above solution has the following shortcomings in practical use:

[0005] The proposed solution involves assembling the columns and related components such as the fan on the bottom surface. However, in actual use, due to the large size and weight of the columns, and the fact that most of the columns are truncated cone-shaped, it is necessary to accurately adjust the positions of adjacent columns during assembly to achieve precise docking. This structure results in a significant waste of time when using a crane for assembly. Summary of the Invention

[0006] The purpose of this invention is to provide a method for the overall hoisting and construction of wind power towers to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for the overall hoisting and construction of a wind power tower, comprising the following specific steps:

[0008] S1. Pour the foundation of the wind turbine tower at the installation location. A flange is pre-embedded on the upper part of the wind turbine tower foundation. A column flange is installed on the side of the column corresponding to the wind turbine tower foundation.

[0009] S2. The multiple columns and fans to be installed are hoisted and placed on the bearing unit in sequence, and spliced ​​and installed with the assistance of the bearing unit;

[0010] S3. Use the lifting unit to pull the load-bearing unit so that the load-bearing unit drives the assembled columns and fan to rotate, and hook the crane hook onto the column for auxiliary lifting;

[0011] S4. After the lifting unit flips the assembled columns and fan to the designated position, it slowly lowers the columns with the assistance of the crane until the bolts are inserted from the seat flange and the nuts are initially tightened to the corresponding bolts. Then, the verticality of the columns is corrected. After the correction is completed, the nuts are tightened.

[0012] S5. Grouting is performed at the bottom of the column so that the foundation of the wind power tower is embedded in the grouting material, and then the nuts are finally tightened.

[0013] Preferably, in S4, when the multiple columns and the fan are rotated to a predetermined position, the multiple columns are in a state that is close to perpendicular to the bearing unit.

[0014] Preferably, the bearing unit includes a bearing base with a U-shaped structure. A plurality of bearing seats are provided on one side below the bearing base. Two mounting slots are formed on the upper surface of the bearing base. A plurality of bearing components for supporting the column and a plurality of driving components for moving the bearing components are provided in the two mounting slots. Each set of bearing components includes two bearing members. A plurality of clamping cylinders are provided on two opposing inner sidewalls of the bearing base. A restraining band is clamped between every two clamping cylinders.

[0015] Preferably, the support component includes two mounting frames, each with a lifting seat slidably connected to its inner wall. Each mounting frame is equipped with a hydraulic cylinder for driving the lifting seat to move up and down. Each lifting seat has a mounting block on one side, and a support belt is provided between the two mounting blocks. Each mounting block is equipped with a locking strip for fixing the support belt.

[0016] Preferably, an installation platform is provided on the other side below the support base. Two sliding grooves are formed on the upper surface of the installation platform. Two movable seats are slidably connected to the installation platform through the two sliding grooves. The lower surface of each movable seat is provided with a slider corresponding to the sliding groove. Two hydraulic cylinders are provided on one side of the installation platform to drive the sliders to move. Each movable seat is rotatably connected to a connecting seat through a rotating shaft.

[0017] Preferably, the driving component includes a base plate, a limiting seat is provided in the middle of the lower surface of the base plate, a limiting pin is inserted into the limiting seat, a plurality of limiting holes corresponding to the limiting pin are provided on the bearing base, a plurality of moving wheels are provided on the lower surface of the base plate, a top plate is provided above the base plate, two telescopic rods are provided between the top plate and the base plate, and a transmission component for driving the top plate to move up and down is provided on the base plate.

[0018] Preferably, the transmission component includes a jack, one end of which is rotatably connected to a fixed block, the fixed block being connected to a base plate, the output end of the jack being provided with a connecting block, the connecting block being rotatably connected to a connecting member via a rotating shaft, the connecting member being provided with a bearing column, and the ends of the bearing column being rotatably connected to a lifting seat via a rotating shaft, the two lifting seats being respectively connected to the base plate and the top plate.

[0019] Preferably, the lifting unit includes a base, a frame is provided on the upper surface of the base, a winch is provided on the top of the frame, the output shaft of the winch is provided with two I-beams, steel wire rope is wound on the I-beams, and each end of the steel wire rope is provided with a lifting ring, and the two lifting rings are connected to the bearing base.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention reduces the difficulty of assembly work by placing the column, wind turbine, and other related components on a supporting unit for installation and assembly. Then, a lifting unit is used to flip the column, wind turbine, and supporting unit. Once the column is vertical, the corresponding flanges are connected, and cement is poured after the flanges are connected to form a relatively tight connection between the column and the wind power tower foundation. When the column is flipped, the weight of the column is distributed through the supporting unit, thereby reducing the force exerted by the crane during the lifting of the column. When the column is in a vertical state, the friction also saves the force exerted by the crane, thus avoiding the use of large lifting equipment and saving manpower and resources. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a reference diagram showing the construction state of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the bearing unit of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the load-bearing component and the driving component of the present invention;

[0026] Figure 5 This is a partial structural schematic diagram of the support unit of the present invention;

[0027] Figure 6 This is an exploded view of the drive component of the present invention.

[0028] In the picture:

[0029] 100. Bearing unit; 200. Lifting unit; 101. Bearing base; 102. Mounting platform; 103. Slide rail; 104. Sliding block; 105. Hydraulic cylinder one; 106. Moving seat; 107. Connecting seat; 108. Mounting groove; 109. Base plate; 110. Limiting seat; 111. Limiting pin; 112. Limiting hole; 113. Moving wheel; 114. Top plate; 115. Telescopic rod; 116. Fixing block; 117. Jack ; 118. Connecting block; 119. Connecting piece; 120. Bearing column; 121. Lifting seat; 122. Mounting frame; 123. Lifting seat; 124. Hydraulic cylinder II; 125. Mounting block; 126. Bearing belt; 127. Locking strip; 128. Clamping cylinder; 129. Restriction belt; 130. Bearing seat; 201. Base; 202. Frame; 203. Winch; 204. I-beam reel; 205. Wire rope; 206. Lifting ring. Detailed Implementation

[0030] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-6 The present invention provides a technical solution:

[0032] like Figure 2 As shown, a method for the overall hoisting and construction of a wind power tower includes the following specific steps:

[0033] S1. Pour the foundation of the wind turbine tower at the installation location. A flange is pre-embedded on the upper part of the wind turbine tower foundation. A column flange is installed on the side of the column corresponding to the wind turbine tower foundation.

[0034] S2. The multiple columns and fans to be installed are hoisted and placed on the bearing unit 100 in sequence, and spliced ​​and installed with the assistance of the bearing unit 100.

[0035] S3. Use the lifting unit 200 to pull the bearing unit 100 so that the bearing unit 100 drives the assembled columns and fan to rotate, and hook the crane hook onto the columns for auxiliary lifting.

[0036] S4. After the lifting unit 200 flips the assembled columns and fan to the designated position, it slowly lowers the columns with the assistance of the crane until the bolts are inserted from the seat flange and the nuts are initially tightened to the corresponding bolts. Then, the verticality of the columns is corrected. After the correction is completed, the nuts are tightened.

[0037] S5. Grouting is performed at the bottom of the column so that the foundation of the wind power tower is embedded in the grouting material, and then the nuts are finally tightened.

[0038] In S4, when multiple columns and fans are rotated to a predetermined position, the multiple columns are in a state that is close to perpendicular to the bearing unit 100.

[0039] like Figure 1 and Figure 3 As shown, the support unit 100 includes a support base 101, which has a U-shaped structure. Several support seats 130 are provided on one side below the support base 101. Two mounting grooves 108 are opened on the upper surface of the support base 101. Several sets of support components for supporting the columns and multiple driving components for moving the support components are provided in the two mounting grooves 108. Each set of support components includes two support components. Multiple clamping cylinders 128 are provided on two opposite inner sidewalls of the support base 101. A limiting band 129 is clamped between every two clamping cylinders 128. When assembling the columns and the fan, the columns and the fan are moved longitudinally and laterally by the driving components, so as to realize the docking work between columns and between columns and the fan. The accuracy is high and it can save manpower and material resources. Under the action of the support components, the height of the two ends of the columns can be adjusted respectively, so as to ensure that the central axes of the two adjacent columns coincide during docking.

[0040] like Figure 4As shown, the support component includes two mounting frames 122. A lifting seat 123 is slidably connected to the inner wall of each mounting frame 122. A second hydraulic cylinder 124 is installed inside each mounting frame 122 to drive the lifting seat 123 up and down. A mounting block 125 is installed on one side of each lifting seat 123. A carrying belt 126 is positioned between the two mounting blocks 125. A locking strip 127 is installed on each mounting block 125 to fix the carrying belt 126. By controlling the operation of the second hydraulic cylinder 124, the lifting seat 123 drives the mounting blocks 125 and the carrying belt 126 to move up and down, thereby adjusting the height of the two ends of the column. The mounting blocks 125 and the locking strip 127 are fixedly connected by bolts.

[0041] It should be noted that the locking strip 127 and the limiting strap 129 are both synthetic fiber lifting straps, which have the advantages of being lightweight, soft, and not damaging the surface of the lifted column. The clamping cylinder 128 is an SMC parallel opening and closing type pneumatic gripper, which can provide strong clamping force and is suitable for various industrial automation scenarios. It can accurately grasp and fix workpieces of different shapes and sizes, and has the advantages of high precision, high reliability, and stable clamping force.

[0042] like Figure 5 As shown, an installation platform 102 is provided on the other side below the support base 101. Two sliding grooves 103 are provided on the upper surface of the installation platform 102. Two movable seats 106 are slidably connected to the installation platform 102 through the two sliding grooves 103. The lower surface of each movable seat 106 is provided with a slider 104 corresponding to the sliding groove 103. Two hydraulic cylinders 105 are provided on one side of the installation platform 102 to drive the sliders 104 to move. Each movable seat 106 is rotatably connected to a connecting seat 107 through a rotating shaft. When the support base 101 is flipped, the hydraulic cylinders 105 are controlled to work so that the movable seats 106 drive the connecting seats 107 to start moving. This can speed up the flipping efficiency of the column and the wind turbine, and can also adjust the overall position of the column and the wind turbine as needed, improving the accuracy of the connection between the column and the wind power tower foundation.

[0043] like Figure 6As shown, the driving component includes a base plate 109. A limiting seat 110 is provided in the middle of the lower surface of the base plate 109. A limiting pin 111 is inserted into the limiting seat 110. A plurality of limiting holes 112 corresponding to the limiting pins 111 are provided on the bearing base 101. A plurality of moving wheels 113 are provided on the lower surface of the base plate 109. A top plate 114 is provided above the base plate 109. Two telescopic rods 115 are provided between the top plate 114 and the base plate 109. The base plate 109 is provided with a mechanism for driving the top plate 114. The downward-moving transmission component separates the limit pin 111 from the limit seat 110 by pulling the limit pin 111. Then, with the action of the moving wheel 113, it is easy for the workers to move the column to a suitable position and then reset the limit pin 111. This can prevent the phenomenon of misalignment between two adjacent columns during assembly. By controlling the operation of the transmission component, the height of the top plate 114 can be adjusted, thereby avoiding the phenomenon of collision between the column and the wind power tower foundation during subsequent docking work due to the large size of the column.

[0044] Furthermore, in order to improve stability during the lifting process of the upright column, the transmission component includes a jack 117. One end of the jack 117 is rotatably connected to a fixing block 116, which is connected to the base plate 109. The output end of the jack 117 is provided with a connecting block 118, which is rotatably connected to a connecting member 119 via a rotating shaft. A bearing column 120 is provided on the connecting member 119, and the ends of the bearing columns 120 are rotatably connected to lifting seats 121 via rotating shafts. The two lifting seats 121 are respectively connected to the base plate 109 and the top plate 114.

[0045] like Figure 1 As shown, the lifting unit 200 includes a base 201, a frame 202 is provided on the upper surface of the base 201, and a winch 203 is provided on the top of the frame 202. The output shaft of the winch 203 is provided with two I-beams 204, and steel wire ropes 205 are wound on the I-beams 204. Each end of the steel wire rope 205 is provided with a lifting ring 206. The two lifting rings 206 are connected to the bearing base 101. The winch 203 mainly consists of a motor, a reducer, a drum, a brake, and a control system. The motor drives the I-beams 204 to rotate through the reducer. The steel wire ropes 205 are wound on the I-beams 204. As the I-beams 204 rotate, the load is lifted or lowered. The brake is used to control the rotation of the I-beams 204 to ensure that the load remains stable when it stops. The control system is used to control the start, stop, and speed adjustment of the winch 203.

[0046] 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 variations 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 method of integral hoisting construction of a wind power tower, characterized by, The specific steps include: S1, pouring the wind power tower foundation at the installation position, the upper part of the wind power tower foundation is pre-buried with a seat flange plate, and a column flange plate is arranged on the side of the column corresponding to the wind power tower foundation; S2, sequentially hoisting and placing the to-be-installed multiple columns and the wind turbine on the bearing unit, and assisting in splicing and installing under the action of the bearing unit; S3, using the hoisting unit to pull the bearing unit to drive the multiple columns and the wind turbine to overturn, hooking the lifting hook of the crane to the column to assist in lifting; S4, after the multiple columns and the wind turbine are overturned to the predetermined position by the hoisting unit, slowly moving the column under the assistance of the crane until the bolt is inserted into the seat flange plate, and the nut is preliminarily tightened corresponding to the bolt, then correcting the perpendicularity of the column, and after the correction is completed, the nut is tightened again; S5, grouting at the bottom end of the column, so that the wind power tower foundation is buried in the grouting material, and then the nut is finally tightened; In S4, when the multiple columns and the wind turbine are overturned to the predetermined position, the multiple columns are in a state close to perpendicular to the bearing unit at this time; The bearing unit comprises a bearing base, the bearing base is in a U-shaped structure, one side below the bearing base is provided with a plurality of bearing seats, and the upper surface of the bearing base is provided with two installation grooves, a plurality of bearing assemblies for supporting the column and a plurality of driving members for moving the bearing assemblies are arranged in the two installation grooves, each bearing assembly comprises two bearing members, a plurality of clamping cylinders are arranged on the two opposite inner side walls of the bearing base, and a limiting belt is clamped between every two clamping cylinders.

2. The overall hoisting construction method of a wind power tower according to claim 1, characterized in that, The bearing member comprises two installation frames, the inner walls of the installation frames are slidably connected with lifting seats, the installation frames are provided with hydraulic cylinders two for driving the lifting seats to move up and down, one side of the lifting seat is provided with an installation block, a bearing belt is arranged between the two installation blocks, and the installation block is provided with a locking strip for fixing the bearing belt.

3. The method of claim 1, wherein the method further comprises: The other side below the bearing base is provided with an installation table, the upper surface of the installation table is provided with two sliding grooves, the installation table is slidably connected with two moving seats through the two sliding grooves, the lower surfaces of the moving seats are provided with sliding blocks corresponding to the sliding grooves, one side of the installation table is provided with two hydraulic cylinders one for driving the sliding blocks to move, and the moving seat is rotatably connected with a connecting seat through a rotating shaft.

4. The method of claim 1, wherein the method further comprises: The driving member comprises a bottom plate, a limiting seat is arranged in the middle of the lower surface of the bottom plate, a limiting pin is inserted into the limiting seat, a plurality of limiting holes corresponding to the limiting pin are formed in the bearing base, a plurality of moving wheels are arranged on the lower surface of the bottom plate, a top plate is arranged above the bottom plate, two telescopic rods are arranged between the top plate and the bottom plate, and a transmission member for driving the top plate to move up and down is arranged on the bottom plate.

5. The method of claim 4, wherein the method further comprises: The transmission comprises a jack, one end of the jack is rotationally connected with a fixed block, the fixed block is connected with the bottom plate, an output end of the jack is provided with a connecting block, the connecting block is rotationally connected with a connecting piece through a rotating shaft, the connecting piece is provided with a bearing column, end portions of the bearing column are rotationally connected with jacking seats through rotating shafts, the two jacking seats are connected with the bottom plate and the top plate respectively.

6. The method of claim 1, wherein the method further comprises: The hoisting unit comprises a base, an upper surface of the base is provided with a frame body, a top of the frame body is provided with a winch, an output shaft of the winch is provided with two spools, the spools are wound with steel wires, end portions of the steel wires are provided with lifting rings, the two lifting rings are connected with the bearing base.

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