Integral hoisting construction method for wind power generation tower

Abstract

The invention discloses an integral hoisting construction method for a wind power generation tower, which belongs to the technical field of wind power generation towers and comprises the following specific steps: pouring a wind power generation tower foundation at a mounting position; a plurality of to-be-installed stand columns and a fan are sequentially hoisted and placed on the bearing unit, and splicing installation is carried out; the lifting unit is used for enabling the bearing unit to drive the multiple stand columns and the draught fan to turn over; after the hoisting unit turns over the multiple assembled stand columns and the fan to set positions, the stand columns slowly move downwards under the assistance of a crane till bolts are inserted into the base flange plates, nuts are preliminarily screwed corresponding to the bolts, then the perpendicularity of the stand columns is corrected, and after correction is completed, the nuts are screwed; and grouting is conducted at the bottom ends of the stand columns, so that the wind power generation tower foundation is buried in the grouting materials, and then final screwing is conducted on the nuts. The difficulty of assembly work can be reduced, and the stand column and the wind power generation tower foundation can be connected more firmly.

Description

Technical Field

[0001] The invention relates to the technical field of wind power towers, in particular to an integral hoisting construction method for a wind power tower. Background Art

[0002] A wind turbine generator is a system that converts the kinetic energy of wind into electrical energy. A wind turbine generator includes a wind rotor and a generator; the wind rotor contains blades, a hub, and reinforcements; it has the functions of generating electricity by rotating the blades under wind force and rotating the generator head. A wind power source consists of a wind turbine generator, a tower supporting the generator, a battery charging controller, an inverter, an unloader, a grid-connected controller, and a battery pack. The tower plays a major supporting role in a wind turbine generator and absorbs the vibration of the unit. A prefabricated concrete tower for wind power is usually a truncated cone-shaped structure with equal taper. The angle between the cylinder wall and the central axis of the tower is about 2.5°. The concrete tower is composed of several cylinder sections. The overall height can reach about 160m, and the radial variation of the top and bottom exceeds 4m. As a relatively pollution-free and renewable energy source, wind power generation has great application prospects. Wind power generation generally sets wind turbines and other related devices on the top of a column of tens of meters or even nearly 100 meters. The overall weight reaches hundreds of tons, making installation more difficult.

[0003] For example, a Chinese invention patent with a publication number of CN112664034A discloses an overall installation method for a wind power tower, including assembling a column and a wind turbine on the ground, casting a mounting platform at the installation position, a pin shaft seat is pre-buried on the upper part of the mounting platform, a pin shaft is passed between the end of the column away from the wind turbine and the pin shaft seat, so that the column can rotate around the position where the pin shaft is passed through the pin shaft seat, a wire rope of a lifting device is connected to the end of the column where the wind turbine is set, a wire rope is fixed to the end of the column where the wind turbine is set, and a hook of a crane is hooked on the wire rope for auxiliary lifting. After the crane vertically lifts the end of the column where the wind turbine is set to a predetermined position, the lifting device is operated to continue to drive the end of the column where the wind turbine is set to rise until the column is vertical, and then the flange plate welded to the bottom end of the column and the flange plate welded to the mounting platform are flange-connected, and cement is poured in the gap between the bottom end of the column and the mounting platform.

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

[0005] This solution is to assemble the columns and related components such as fans 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 in a frustum-shaped structure, it is necessary to accurately adjust the positions of two adjacent columns during assembly in order to achieve precise docking. The above structure results in a lot of time being wasted when using a crane for splicing. Summary of the invention

[0006] The object of the present invention is to provide a method for integrally hoisting and constructing a wind power tower to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a method for integrally hoisting a wind power tower, the specific steps of which include:

[0008] S1. Cast the foundation of the wind power tower at the installation location. A flange is pre-buried on the upper part of the wind power tower foundation. A column flange is arranged on the side of the column corresponding to the wind power tower foundation.

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

[0010] S3, using the lifting unit to pull the bearing unit so that the bearing unit drives the assembled multiple columns and the fan to flip, and hooking the crane hook to the column to perform auxiliary lifting;

[0011] S4. After the lifting unit flips the assembled columns and fans to the predetermined position, the columns are slowly moved downward with the assistance of the crane until the bolts are inserted from the seat flange, and the nuts are preliminarily tightened against the bolts. The verticality of the columns is then corrected, and the nuts are tightened after the correction is completed.

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

[0013] Preferably, in S4, when the plurality of columns and the fan are flipped to a predetermined position, the plurality of columns are in a nearly vertical state with respect to the bearing unit.

[0014] Preferably, the bearing unit includes a bearing base, which is in a U-shaped structure, and a plurality of bearing seats are arranged on one side below the bearing base, and two mounting grooves are provided on the upper surface of the bearing base, and a plurality of groups of bearing components for supporting the columns and a plurality of driving components for moving the bearing components are arranged in the two mounting grooves, and each group of the bearing components includes two bearing components, and a plurality of clamping cylinders are arranged on two opposite inner side walls of the bearing base, and a limiting band is clamped between every two of the clamping cylinders.

[0015] Preferably, the supporting member includes two mounting frames, the inner walls of the mounting frames are slidably connected with a lifting seat, two hydraulic cylinders for driving the lifting seat to move up and down are arranged in the mounting frames, a mounting block is arranged on one side of the lifting seat, a carrying belt is arranged between the two mounting blocks, and a locking strip for fixing the carrying belt is arranged on the mounting blocks.

[0016] Preferably, a mounting platform is provided on the other side below the supporting base, and two slide grooves are provided on the upper surface of the mounting platform. The mounting platform is slidably connected to two movable seats through the two slide grooves, and the lower surfaces of the movable seats are provided with sliders corresponding to the slide grooves. Two hydraulic cylinders for driving the sliders to move are provided on one side of the mounting platform, and the movable seats are rotatably connected to connecting seats through rotating shafts.

[0017] Preferably, the driving member includes a base plate, a limiting seat is arranged in the middle of the lower surface of the base plate, a limiting pin is inserted on the limiting seat, a plurality of limiting holes corresponding to the limiting pins are opened on the supporting base, a plurality of movable wheels are arranged on the lower surface of the base plate, a top plate is arranged above the base plate, two telescopic rods are arranged between the top plate and the base plate, and a transmission member for driving the top plate to move up and down is arranged on the base plate.

[0018] Preferably, the transmission member includes a jack, one end of the jack is rotatably connected to a fixed block, the fixed block is connected to the base plate, the output end of the jack is provided with a connecting block, the connecting block is rotatably connected to a connecting member via a rotating shaft, a bearing column is provided on the connecting member, the ends of the bearing columns are rotatably connected to a lifting seat via a rotating shaft, and the two lifting seats are 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-shaped wheels, a steel wire rope is wound around the I-shaped wheels, and both ends of the steel wire rope are provided with lifting rings, and the two lifting rings are connected to the bearing base.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention can reduce the difficulty of assembly work by placing columns, fans and other related components on a bearing unit for installation and splicing, and then overturn the columns, fans and bearing unit through a lifting unit, and perform corresponding flange connection when the columns are vertical, and pour cement after the flange connection, so that a relatively tight connection is made between the columns and the foundation of the wind power tower; when the columns are overturned, the gravity of the column part is shared by the bearing unit, so that the force applied by the crane to the columns during lifting can be reduced, and when the columns are in a vertical state, the force applied by the crane can also be saved under the action of friction, so that the use of large lifting equipment can be avoided, saving manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 A reference diagram of the construction state of the present invention;

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

[0025] Figure 4 It is a structural schematic diagram of the bearing assembly and the driving member of the present invention;

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

[0027] Figure 6 It is a structural disassembly diagram of the driving member of the present invention.

[0028] In the figure:

[0029] 100, bearing unit; 200, lifting unit; 101, bearing base; 102, mounting platform; 103, slideway; 104, slide block; 105, hydraulic cylinder 1; 106, moving seat; 107, connecting seat; 108, mounting slot; 109, bottom plate; 110, limit seat; 111, limit pin; 112, limit 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 2; 125, mounting block; 126, bearing belt; 127, locking strip; 128, clamping cylinder; 129, limiting belt; 130, bearing seat; 201, base; 202, frame; 203, winch; 204, I-shaped pulley; 205, wire rope; 206, lifting ring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-6 , the present invention provides a technical solution:

[0032] like Figure 2 As shown, a method for integrally hoisting a wind power tower comprises the following specific steps:

[0033] S1. Cast the foundation of the wind power tower at the installation location. A flange is pre-buried on the upper part of the wind power tower foundation. A column flange is arranged on the side of the column corresponding to the wind power tower foundation.

[0034] S2, hoisting and placing multiple columns and fans to be installed on the carrying unit 100 in sequence, and splicing and installing them with the assistance of the carrying unit 100;

[0035] S3, using the lifting unit 200 to pull the bearing unit 100 so that the bearing unit 100 drives the assembled multiple columns and the fan to flip, and hooking the crane hook to the column to perform auxiliary lifting;

[0036] S4, after the lifting unit 200 turns over the assembled multiple columns and the fan to the predetermined position, the columns are slowly moved downward with the assistance of the crane until the bolts are inserted from the seat flange, and the nuts are initially tightened corresponding to the bolts, and 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 turbine tower is buried in the grouting material, and then the nuts are finally tightened.

[0038] In S4 , when the plurality of columns and the fan are flipped to a predetermined position, the plurality of columns are in a nearly vertical state with respect to the carrying unit 100 .

[0039] like Figure 1 and Figure 3 As shown, the bearing unit 100 includes a bearing base 101, which is in a U-shaped structure. A plurality of bearing seats 130 are arranged on one side below the bearing base 101. Two mounting grooves 108 are provided on the upper surface of the bearing base 101. A plurality of bearing components for supporting the columns and a plurality of driving members for moving the bearing components are arranged in the two mounting grooves 108. Each group of bearing components includes two bearing members. A plurality of clamping cylinders 128 are arranged on two opposite inner walls of the bearing base 101. A limiting belt 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 transversely by the driving members, so that the docking work between the columns and the columns and between the columns and the fan can be realized, with high accuracy and saving manpower and material resources. Under the action of the bearing components, the heights 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 when docking.

[0040] like Figure 4As shown, the bearing member includes two mounting frames 122, the inner walls of the mounting frames 122 are slidably connected with lifting seats 123, and hydraulic cylinders 124 for driving the lifting seats 123 to move up and down are arranged in the mounting frames 122. A mounting block 125 is arranged on one side of the lifting seats 123, and a carrying belt 126 is arranged between the two mounting blocks 125. The mounting blocks 125 are provided with locking strips 127 for fixing the carrying belts 126. By controlling the operation of the hydraulic cylinders 124, the lifting seats 123 drive the mounting blocks 125 and the carrying belts 126 to move up and down, thereby realizing the adjustment of the height of the two ends of the column, wherein the mounting blocks 125 and the locking strips 127 are fixedly connected by bolts.

[0041] It should be noted that the locking strip 127 and the limiting strip 129 are both synthetic fiber lifting belts, which have the advantages of being light weight, soft, and not damaging the surface of the suspended column. The clamping cylinder 128 is SMC's parallel opening and closing air claw, 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, strong reliability, and stable clamping force.

[0042] like Figure 5 As shown, a mounting platform 102 is provided on the other side below the supporting base 101, and two slide grooves 103 are provided on the upper surface of the mounting platform 102. The mounting platform 102 is slidably connected to two moving seats 106 through the two slide grooves 103. The lower surfaces of the moving seats 106 are provided with sliders 104 corresponding to the slide grooves 103. Two hydraulic cylinders 105 for driving the sliders 104 to move are provided on one side of the mounting platform 102. The moving seats 106 are rotatably connected to connecting seats 107 through rotating shafts. When the supporting base 101 is turned over, the hydraulic cylinder 105 is controlled to work so that the moving seat 106 drives the connecting seat 107 to start moving, thereby accelerating the turning efficiency of the column and the wind turbine, and adjusting the overall position of the column and the wind turbine as needed, thereby improving the accuracy of the connection between the column and the foundation of the wind power tower.

[0043] like Figure 6As shown, the driving member includes a bottom plate 109, a limit seat 110 is arranged in the middle of the lower surface of the bottom plate 109, a limit pin 111 is inserted on the limit seat 110, a plurality of limit holes 112 corresponding to the limit pin 111 are opened on the bearing base 101, a plurality of moving wheels 113 are arranged on the lower surface of the bottom plate 109, a top plate 114 is arranged above the bottom plate 109, two telescopic rods 115 are arranged between the top plate 114 and the bottom plate 109, and a telescopic rod 115 for driving the top plate 114 on the bottom plate 109 is arranged on the bottom plate 109. The transmission member moves downward, and the limit pin 111 is pulled to separate it from the limit seat 110. Then, the staff can move the column to a suitable position under the action of the moving wheel 113, and then reset the limit pin 111, which can avoid the offset between two adjacent columns during assembly. By controlling the operation of the transmission member, the height of the top plate 114 can be adjusted, thereby avoiding the collision between the column and the foundation of the wind power tower during the subsequent docking work due to the large volume of the column.

[0044] Furthermore, in order to improve the stability during the pushing process of the column, the transmission part includes a jack 117, one end of the jack 117 is rotatably connected to a fixed block 116, the fixed block 116 is connected to the base plate 109, and the output end of the jack 117 is provided with a connecting block 118, the connecting block 118 is rotatably connected to a connecting member 119 through a rotating shaft, a bearing column 120 is provided on the connecting member 119, and the ends of the bearing column 120 are rotatably connected to a lifting seat 121 through a rotating shaft, and 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, a winch 203 is provided on the top of the frame 202, the output shaft of the winch 203 is provided with two I-shaped wheels 204, a steel wire rope 205 is wound around the I-shaped wheels 204, and both ends of the steel wire rope 205 are provided with lifting rings 206, and the two lifting rings 206 are connected to the bearing base 101, wherein the winch 203 is mainly composed of a motor, a reducer, a drum, a brake, a control system, etc., the motor drives the I-shaped wheel 204 to rotate through the reducer, the steel wire rope 205 is wound around the I-shaped wheel 204, and the weight is lifted or lowered as the I-shaped wheel 204 rotates, the brake is used to control the rotation of the I-shaped wheel 204 to ensure that the weight remains stable when it stops, and the control system is used to control the start, stop, speed regulation and other operations of the winch 203.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for integrally hoisting a wind power tower, characterized in that: The specific steps include: S1. Cast the foundation of the wind power tower at the installation location. A flange is pre-buried on the upper part of the wind power tower foundation. A column flange is arranged on the side of the column corresponding to the wind power tower foundation. S2. Multiple columns and fans to be installed are hoisted and placed on the load-bearing unit in sequence, and are spliced ​​and installed with the assistance of the load-bearing unit; S3, using the lifting unit to pull the bearing unit so that the bearing unit drives the assembled multiple columns and the fan to flip, and hooking the crane hook to the column to perform auxiliary lifting; S4. After the lifting unit flips the assembled columns and fans to the predetermined position, the columns are slowly moved downward with the assistance of the crane until the bolts are inserted from the seat flange, and the nuts are preliminarily tightened against the bolts. The verticality of the columns is then corrected, and the nuts are tightened after the correction is completed. S5. Grouting is performed at the bottom of the column so that the foundation of the wind turbine tower is buried in the grouting material, and then the nuts are finally tightened.

2. The method for integrally hoisting a wind power tower according to claim 1, characterized in that: In the step S4, when the plurality of columns and the fan are flipped to a predetermined position, the plurality of columns are in a nearly vertical state with respect to the bearing unit.

3. The method for integrally hoisting a wind power tower according to claim 1, characterized in that: The bearing unit includes a bearing base, which is in a U-shaped structure. A plurality of bearing seats are arranged on one side below the bearing base. Two mounting grooves are provided on the upper surface of the bearing base. A plurality of groups of bearing components for supporting columns and a plurality of driving members for moving the bearing components are arranged in the two mounting grooves. Each group of the bearing components includes two bearing members. A plurality of clamping cylinders are arranged on two opposite inner side walls of the bearing base, and a limiting belt is clamped between every two clamping cylinders.

4. The method for integrally hoisting a wind power tower according to claim 3, characterized in that: The bearing member includes two mounting frames, the inner walls of the mounting frames are slidably connected with a lifting seat, two hydraulic cylinders for driving the lifting seat to move up and down are arranged in the mounting frames, a mounting block is arranged on one side of the lifting seat, a bearing belt is arranged between the two mounting blocks, and a locking strip for fixing the bearing belt is arranged on the mounting blocks.

5. The method for integrally hoisting a wind power tower according to claim 3, characterized in that: A mounting platform is provided on the other side below the bearing base, and two slide grooves are provided on the upper surface of the mounting platform. The mounting platform is slidably connected to two moving seats through the two slide grooves, and sliders corresponding to the slide grooves are provided on the lower surfaces of the moving seats. Two hydraulic cylinders for driving the sliders to move are provided on one side of the mounting platform, and the moving seats are rotatably connected to connecting seats through rotating shafts.

6. The method for integrally hoisting a wind power tower according to claim 3, characterized in that: The driving member includes a base plate, a limit seat is arranged in the middle of the lower surface of the base plate, a limit pin is inserted on the limit seat, a plurality of limit holes corresponding to the limit pin are opened on the bearing base, a plurality of moving wheels are arranged on the lower surface of the base plate, a top plate is arranged above the base plate, two telescopic rods are arranged between the top plate and the base plate, and a transmission member for driving the top plate to move up and down is arranged on the base plate.

7. The method for integrally hoisting a wind power tower according to claim 6, characterized in that: The transmission member includes a jack, one end of the jack is rotatably connected to a fixed block, the fixed block is connected to a base plate, an output end of the jack is provided with a connecting block, the connecting block is rotatably connected to a connecting member via a rotating shaft, a bearing column is provided on the connecting member, the ends of the bearing columns are rotatably connected to a lifting seat via a rotating shaft, and the two lifting seats are respectively connected to the base plate and the top plate.

8. The method for integrally hoisting a wind power tower according to claim 3, characterized in that: The lifting unit includes a base, a frame is arranged on the upper surface of the base, a winch is arranged on the top of the frame, the output shaft of the winch is provided with two I-shaped wheels, a steel wire rope is wound around the I-shaped wheels, and the ends of the steel wire rope are provided with lifting rings, and the two lifting rings are connected to the bearing base.

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