Lifting device of wind power tower drum and lifting method of lifting device

Abstract

The invention relates to a hoisting device of a wind power tower drum and a hoisting method thereof, and relates to the technical field of offshore wind power tower drum installing.The hoisting device comprises a connecting piece connected with a crane, an adjusting mechanism is arranged on one side of the connecting piece, a plurality of clamping mechanisms are arranged on the adjusting mechanism in a circular array mode, and a jacking mechanism is arranged on one side of the adjusting mechanism; the adjusting mechanism comprises shells, moving mechanisms are arranged between the shells, moving plates are meshed between the moving mechanisms, and a plurality of groups of moving plates are arrayed along the circumference of the shells and are correspondingly connected with the clamping mechanisms; the jacking mechanism comprises a power module, a plurality of adjusting plates are arranged on the circumference of the power module, and the adjusting plates and the power module are connected through telescopic mechanisms; the adjusting mechanism adjusts the clamping space between the clamping mechanism and the outer portion of the tower barrel, and the jacking mechanism clamps the inner wall of the tower barrel. According to the device, the outer wall and the inner wall of the tower drum are simultaneously clamped, so that the hoisting safety, the hoisting stability and the working efficiency are improved, the problem of difficulty in mounting caused by unstable gravity of a steel wire rope is avoided, and the working time is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power tower installation, and in particular to a wind power tower hoisting device and a wind power tower hoisting method. Background Art

[0002] For the installation of offshore wind power towers, due to their large size and weight, they need to be installed in sections. At present, most manufacturers use the method of lifting lugs and wire ropes to lift the two ends of the tower when installing wind power towers, and then loosen the lifting part of a lifting lug after the moving distance, use the tower's own weight to place the tower vertically, and then install it in a fixed position. However, due to the extremely harsh working environment at sea, it is very difficult to install and suspend the lifting lug wire rope, and the balance of the lifting point position is relatively poor. In most cases, it is easy to capsize due to external pressure such as wind and waves, which seriously affects the efficiency of lifting and increases the risk of lifting.

[0003] Therefore, a device that can improve the lifting efficiency and ensure reliable lifting is needed to solve the above problems. Summary of the invention

[0004] Purpose of the invention: The present invention provides a hoisting device for a wind turbine tower, and further provides a hoisting method based on the above-mentioned reinforcement device to solve the above-mentioned problems existing in the prior art.

[0005] Technical solution: A hoisting device for a wind power tower, comprising a connecting piece connected to a crane, one side of the connecting piece is connected to an adjusting mechanism, a plurality of clamping mechanisms are arranged in a circular array between the adjusting mechanisms, and a jacking mechanism is arranged on one side of the adjusting mechanism; wherein the adjusting mechanism comprises an outer shell, a moving mechanism is arranged between the outer shells, a movable plate is meshingly connected between the movable mechanisms, the movable plates are arranged in a plurality of groups along the circumference of the outer shells and are connected correspondingly to the clamping mechanism; the jacking mechanism comprises a connecting plate connected to one side of the outer shell, a power module is arranged on one side of the connecting plate, a plurality of adjusting plates are arranged in a circular array of the power module, and the adjusting plate is connected to the power module by a telescopic mechanism; the adjusting mechanism is used to adjust the clamping space between the clamping mechanism and the outside of the tower, The jacking mechanism is used to clamp the inner wall of the tower; when hoisting the tower, the jacking mechanism is placed in the wall of one end of the tower. At this time, the movement mechanism of the adjusting mechanism drives several movable plates engaged with it to move telescopically, until the clamping mechanism connected under the movable plate clamps the edge of the flange at the edge of the tower. At the same time, the bottom surface of the outer shell fits with one end of the tower, and the power module of the jacking mechanism drives the telescopic mechanism connected to it to move, and the telescopic mechanism drives several adjusting plates connected to it to extend outward until the outer wall of the adjusting plate is tightly fitted with the inner wall of the tower, thereby realizing the simultaneous hoisting of the inside and outside of the tower, avoiding the problem of unstable center of gravity caused by the wire rope being easily affected by external forces, and being easy to install, further improving the stability of hoisting, greatly saving work time and improving work efficiency.

[0006] In a further embodiment, the motion mechanism includes a motor arranged on one side of the shell, one side of the motor is connected to a first gear, the first gear is arranged inside the shell, one side of the first gear is meshedly connected to the second gear, both sides of the second gear are provided with a toothed structure, the first gear is connected to the outer side of the second gear, the inner side of the second gear is meshedly connected to a plurality of third gears, the third gears are respectively connected in the shell and meshedly connected with the movable plate accordingly; when the clamping space of the clamping mechanism is adjusted, the motor drives the first gear connected to it to rotate, the first gear drives the second gear connected to it to rotate, the second gear drives the plurality of third gears connected to it to rotate, and the plurality of third gears respectively drive the corresponding movable plates to perform telescopic movements, thereby realizing the adjustment of the clamping space of the clamping mechanism, further improving the flexibility and practicality of the clamping mechanism, greatly saving work time, and further saving work costs.

[0007] In a further embodiment, the telescopic mechanism includes a cylinder arranged on one side of the connecting plate, the outer sleeve of the cylinder is provided with a sleeve, the top rod of the cylinder passes through the sleeve away from the side of the connecting plate, and one end is provided with a moving plate, the moving plate circumferential array has a plurality of first rotating plates correspondingly connected to the adjusting plate, the outer wall of the sleeve has a plurality of second rotating plates linearly arrayed, the second rotating plates behind the linear array are arranged in a plurality of groups along the circumferential array of the sleeve and corresponding to the adjusting plate, each group of the second rotating plates is rotatably connected to the adjusting plate; when the inner wall of the tower is tightened, the cylinder drives the top rod connected thereto to move downward, and the top rod drives the moving plate connected thereto to move downward, thereby making the second rotating plate rotatably connected around the moving plate stretch outward, thereby driving the adjusting plates respectively connected thereto to stretch outward, and the movement of the adjusting plate simultaneously drives the second rotating plate rotatably connected thereto to rotate, thereby further supporting the adjusting plate, until the outer wall of the adjusting plate fits with the inner wall of the tower, further realizing the clamping of the inside of the tower, improving the stability of the hoisting, and being easy to realize, greatly improving the efficiency of the hoisting.

[0008] In a further embodiment, the shell includes an upper shell and a lower shell, a support portion extending a preset distance from the middle of the upper shell to the end of the lower shell, and a through groove is provided at the connection between the outer wall of the upper shell, the support portion, the lower shell and the movable plate, and the movable plate slides along the through groove to adjust the clamping space of the clamping mechanism on the movable plate. The movable plate moves along the outer wall of the upper shell, the support portion and the through groove on the lower shell, further improving the working stability and clamping efficiency, and greatly saving the lifting time.

[0009] In a further embodiment, the second gear is slidably connected to the outer wall of the upper shell to improve the stability of the movement of the second gear.

[0010] In a further embodiment, the third gear is rotatably connected between the upper shell and the lower shell via a rotating shaft, and is used to drive the movable plate to move, thereby improving the stability of the movement of the movable plate.

[0011] In a further embodiment, an anti-slip structure is provided on the outer wall of the adjustment plate for clamping the inner wall of the tower, thereby further improving the stability of the tower clamping.

[0012] In a further embodiment, the clamping mechanism includes a double-axis cylinder, and a first clamping claw and a second clamping claw are respectively connected to both sides of the double-axis cylinder, wherein the first clamping claw is connected to the movable plate and is used to clamp the flange at the end of the tower, so that flanges of different thicknesses can be clamped, thereby further improving the practicality and flexibility of the clamping mechanism.

[0013] In a further embodiment, the side of the first clamping claw away from the adjusting mechanism is flush with the side of the lower shell away from the adjusting mechanism, avoiding the problem of collision between the first clamping claw and the flange of the tower, further improving the safety of clamping, greatly improving the efficiency of clamping, and saving work time.

[0014] A method for hoisting a wind power tower based on a hoisting device comprises the following steps: S1, connect the connecting piece to the crane, place the jacking mechanism into the tower, until one end of the tower fits with one side of the lower shell, and then enter S2 and S3; S2, the movement mechanism inside the housing of the adjustment mechanism starts to move, that is, the motor drives the first gear connected thereto to rotate, the first gear drives the second gear connected thereto to rotate, the second gear drives the plurality of third gears connected thereto to rotate, and the plurality of third gears respectively drive the corresponding moving plates to perform circular telescopic movement along the housing until the jacking mechanism on the moving plate matches the outer wall size of the flange at the end of the tower, thereby adjusting the clamping space of the clamping mechanism, and the double-axis cylinder of the clamping mechanism respectively drives the first clamping claw and the second clamping claw connected thereto to move toward the flange at the same time until the flange is clamped, and then enters S4; S3. At the same time, the telescopic mechanism of the tightening mechanism drives the adjusting plate to adjust the diameter, that is, the cylinder drives the push rod connected thereto to move downward, and the push rod drives the moving plate connected thereto to move downward, thereby making the second rotating plate rotatably connected around the moving plate stretch outward, thereby driving the adjusting plates respectively connected thereto to stretch outward, and the movement of the adjusting plate simultaneously drives the second rotating plate rotatably connected thereto to rotate, thereby further supporting the adjusting plate, until the outer wall of the adjusting plate fits with the inner wall of the tower, thereby achieving the clamping of the inner wall of the tower, and then entering S4; S4, and so on, repeat S1 to S3 in sequence until the tower in the area is installed.

[0015] Beneficial effects: The present invention provides a hoisting device for a wind power tower and a hoisting method thereof, comprising a connecting piece connected to a crane, an adjusting mechanism connected to one side of the connecting piece, a plurality of clamping mechanisms in a circular array between the adjusting mechanisms, and a jacking mechanism arranged on one side of the adjusting mechanism; the adjusting mechanism comprises an outer shell, a moving mechanism is arranged between the outer shells, a movable plate is meshed and connected between the movable mechanisms, the movable plates are arranged in a plurality of groups along the circumference of the outer shells and are connected correspondingly to the clamping mechanism; the jacking mechanism comprises a connecting plate connected to one side of the outer shell, a power module is arranged on one side of the connecting plate, a plurality of adjusting plates in a circular array of the power module, and the adjusting plate is connected to the power module through a telescopic mechanism; the adjusting mechanism is used to adjust the clamping space between the clamping mechanism and the outside of the tower, and the jacking mechanism is used to clamp the inner wall of the tower; the outer wall and the inner wall of the tower are clamped and clamped at the same time by the arrangement of the telescopic mechanism and the adjusting mechanism, thereby improving the safety and stability of the hoisting, avoiding the problem of installation difficulties caused by unstable gravity of the wire rope, further improving the work efficiency, and saving the work time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structural assembly of the present invention.

[0017] Figure 2 It is a schematic diagram of the connection structure of the clamping mechanism, the adjusting mechanism and the jacking mechanism of the present invention.

[0018] Figure 3 It is a schematic diagram of the connection structure between the clamping mechanism and the adjusting mechanism of the present invention.

[0019] Figure 4 It is a schematic diagram of the internal structure of the regulating mechanism of the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the tightening mechanism of the present invention.

[0021] Figure 6 It is a schematic diagram of the shell structure of the adjustment mechanism of the present invention.

[0022] Figure 7 It is a schematic diagram of the lower shell structure of the adjustment mechanism of the present invention.

[0023] Figure 8 It is a schematic diagram of the connection structure between the second rotating plate and the adjusting plate of the present invention.

[0024] Fig. 9 It is a schematic diagram of the structure in which the first rotating plate of the present invention is connected to the moving plate and the adjusting plate respectively.

[0025] Fig.10 It is a schematic diagram of the connection structure between the clamping mechanism and the movable plate of the present invention.

[0026] The reference numerals in the figure are: wind turbine tower 1, clamping mechanism 2, first clamping claw 2a, double-axis cylinder 2b, second clamping claw 2c, adjusting mechanism 3, upper shell 3a, supporting part 31a, lower shell 3b, motor 3c, first gear 3d, moving plate 3e, second gear 3f, third gear 3g, connecting member 4, clamping mechanism 5, adjusting plate 5a, rubber pad 51a, first connecting block 52a, first rotating plate 5b, moving plate 5c, push rod 5d, sleeve 5e, second connecting block 51e, second rotating plate 5f. DETAILED DESCRIPTION

[0027] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0028] The applicant believes that most of the current methods use the method of lifting lugs and wire ropes to lift both ends of the tower, then loosen the lifting part of one lug after the moving distance, use the tower's own weight to place the tower vertically, and then install it in a fixed position. However, due to the extremely harsh working environment at sea, the lifting lug wire rope is very difficult to install and suspend, and the balance of the lifting point is relatively poor. In most cases, it is easy to capsize due to external pressure such as wind and waves, which seriously affects the efficiency of lifting and increases the risk of lifting.

[0029] To this end, the applicant has designed a hoisting device for a wind turbine tower 1 and a hoisting method thereof, by utilizing a tightening mechanism 5 inserted inside the wind turbine tower 1 to clamp the interior of the wind turbine tower 1, and utilizing the cooperation of an adjusting mechanism 3 and a clamping mechanism 2 to clamp the flange on the outside of the wind turbine tower 1. Moreover, the center of gravity of the hoisting device of this embodiment coincides with the center of gravity of the tower after being vertically erected, thereby further improving the stability and safety of the hoisting. At the same time, the hoisting device itself has a certain weight, which can resist a certain external force, thereby improving work efficiency, saving work time, and greatly saving installation costs.

[0030] The present invention provides a hoisting device for a wind power tower 1, such as Figures 1 to 10As shown, it includes a connecting member 4 welded to the middle of the shell, one end of the connecting member 4 is connected to the crane, an adjusting mechanism 3 is arranged below the connecting member 4, and a clamping mechanism 2 connected to the adjusting mechanism 3, and a tightening mechanism 5 placed inside the wind power tower 1, wherein the portion where the connecting member 4 is connected to the crane can be designed as a cylindrical shape or a hook shape, which can be determined according to actual conditions, the adjusting mechanism 3 includes a shell connected to the connecting member 4, and the shell is arranged as an upper shell 3a and a lower shell 3b, and the upper shell 3a and the lower shell 3b are assembled together by welding or screws, A cavity is provided inwardly extending a preset distance from one side of the upper shell 3a and the lower shell 3b, and a motion mechanism is provided in the cavity. The motion mechanism includes a first gear 3d provided on one side of the cavity, a motor 3c connected to the first gear 3d and provided on the shell, and a second gear 3f provided in the cavity and meshingly connected with the first gear 3d on the outside. The inner circle and the outer circle of the second gear 3f are both provided as tooth structures, a protrusion is provided in the middle of the upper surface of the second gear 3f, and a circular groove matching the protrusion is provided on the upper surface inside the upper shell 3a, and the protrusion is slidably connected to the circular groove. The second gear 3f is placed inside and falls off from the outer shell when it rotates. Five third gears 3g are meshed and connected on the inner circumferential tooth structure of the second gear 3f. The five third gears 3g are arranged in a circumferential array. The five third gears 3g are rotatably connected between the upper shell 3a and the lower shell 3b through the rotating shaft. The middle part of the upper shell 3a is set as a support part 31a with a preset height. At the bottom end of the support part 31a and the side where the upper shell 3a is connected to the lower shell 3b, there are five through grooves in a circumferential array respectively. The upper surfaces of the five through grooves are located in the same plane, and the lower surfaces are also located in the same plane. The five moving plates 3 e respectively pass through the through slots arranged at the bottom end of the support part 31a and the connection between the upper shell 3a and the lower shell 3b, and a toothed structure is arranged on one side, and the toothed structure on one side of each movable plate 3e is respectively meshed and connected with the corresponding third gear 3g, and five clamping mechanisms 2 are respectively arranged at the outer ends of the five movable plates 3e, and a protrusion is arranged at the connection between the clamping mechanism 2 and the movable plate 3e, and a connecting groove matching the protrusion is arranged on the movable plate 3e, and the connecting groove and the protrusion are interference fit, or the clamping mechanism 2 is directly welded on the movable plate 3e, so as to realize the stable positioning of the clamping mechanism 2;The tightening mechanism 5 includes a connecting plate welded to the bottom of the lower shell 3b. The connecting plate and the lower shell 3b can also be connected by an automatic locking mechanism in the known common sense, which is convenient for disassembly. A power module is arranged under the connecting plate. Three adjusting plates 5a are arranged in a circumferential array of the power module. The three adjusting plates 5a are connected to the power module by a telescopic mechanism. The power module includes a cylinder. A sleeve 5e is arranged on the outside of the cylinder. A push rod 5d of the cylinder extends outward through one side of the sleeve 5e. A moving plate 5c of the telescopic mechanism is connected to one end of the push rod 5d extending outward. Two groups of second connecting blocks 51e are arranged in a longitudinal array on the outside of the sleeve 5e. Then, three groups of second connecting blocks 51e are arranged in a circumferential array along the sleeve 5e. The inner wall of the section plate 5a is provided with six first connection blocks 52a respectively connected to the plurality of groups of second connection blocks 51e, and the positions corresponding to the moving plate 5c are also provided with three first connection blocks 52a in a circumferential array, wherein the three first connection blocks 52a are respectively connected to the moving plate 5c through the first rotating plate 5b, and the six first connection blocks 52a are respectively connected to the six second connection blocks 51e through the second rotating plate 5f, for adjusting the working interval between the adjusting plates 5a. Of course, the five third gears 3g, five through slots, five moving plates 3e, five clamping mechanisms 2, three adjusting plates 5a, six first connection blocks 52a and six second connection blocks 51e in this embodiment are only examples of this embodiment, and can be increased or decreased according to actual conditions. ;

[0031] In actual use, the tightening mechanism 5 is placed inside the wind turbine tower 1 until the surface of the lower shell 3b is tightly fitted with the top surface of the flange of the wind turbine tower 1. At this time, the motor 3c of the adjusting mechanism 3 moves, and the movement of the motor 3c drives the first gear 3d connected thereto to rotate. The rotation of the first gear 3d drives the second gear 3f meshing therewith to make a circular motion relative to the upper shell 3a. The rotation of the second gear 3f makes the toothed structure on its inner circle drive the five third gears 3g meshing therewith to rotate. The rotation of the five third gears 3g respectively drives the five movable plates 3e meshing therewith to perform diameter telescopic movement until the clamping mechanism 2 arranged on the movable plate 3e matches the position of the flange of the wind turbine tower 1, and then the flange is clamped by the clamping mechanism 2. At the same time, the cylinder of the tightening mechanism 5 drives the ejector rod 5d connected thereto. Move downward, the movement of the top rod 5d drives the connected moving plate 5c to move downward, and the movement of the moving plate 5c drives the first rotating plate 5b connected to it to extend, and the movement of the first rotating plate 5b causes the second rotating plate 5f connected between the sleeve 5e and the adjusting plate 5a to extend, and the extending movement of the first rotating plate 5b and the second rotating plate causes the connected adjusting plate 5a to expand its diameter, until the outer walls of the three adjusting plates 5a are tightly fitted with the inner wall of the wind turbine tower 1, and the wind turbine tower 1 is fastened and clamped by the inner and outer double layers, so as to further improve the stability and safety of the hoisting, and the hoisting device itself has its own gravity and can withstand a certain external force impact, so as to further improve the convenience of installation, reduce the problem of easy tilting of wire rope hoisting, greatly improve the efficiency of hoisting, and save the cost of hoisting.

[0032] After the adjustment plate 5a of the tightening mechanism 5 is fitted with the inside of the wind turbine tower 1, it is easy to slip during the construction process, which leads to unstable lifting. In order to solve this problem, in this embodiment, an anti-slip structure is provided on the outer wall of the three adjustment plates 5a. The anti-slip structure can be a rubber pad 51a or some other anti-slip structure known in the art. The anti-slip structure makes the adjustment plate 5a fit tightly with the inner wall of the wind turbine tower 1, thereby further improving the stability and safety of the lifting, and also improving the practicability of the lifting device.

[0033] Since there will be wind turbine tower 1 installation projects of different sizes or diameters, the flange thicknesses of wind turbine towers 1 of different specifications will also be inconsistent. In order to make the lifting device suitable for wind turbine towers 1 of various specifications, the clamping mechanism 2 in this embodiment includes a double-axis cylinder 2b, and a first clamping claw 2a and a second clamping claw 2c are respectively arranged at both ends of the double-axis cylinder 2b. The upper part of the first clamping claw 2a is connected to the movable plate 3e, and the lower surface of the first clamping claw 2a is flush with the lower surface of the lower shell 3b. When the flange of the wind turbine tower 1 of different thicknesses is clamped, the double-axis cylinder 2b moves downward, thereby causing the second clamping claw 2c to move downward as well, until the first clamping claw 2a and the second clamping claw 2c are tightly engaged in the upper and lower positions of the flange, thereby improving the flexibility of the lifting device, further saving the lifting cost, greatly improving the work efficiency, and saving the work cost.

[0034] The hoisting method of the hoisting device of the wind turbine tower 1, the specific operating principle is to first connect the connecting piece 4 with the crane, and place the tightening mechanism 5 into the interior of the tower until one end of the wind turbine tower 1 is in contact with one side of the lower shell; then, the moving mechanism inside the outer shell of the adjusting mechanism 3 starts to move, that is, the motor 3c drives the first gear 3d connected thereto to rotate, the first gear 3d drives the second gear 3f connected thereto to rotate, the second gear 3f drives a plurality of third gears 3g connected thereto to rotate, and the plurality of third gears 3g respectively drive the corresponding moving plates 3e to perform circular telescopic movements along the outer shell until the tightening mechanism 5 on the moving plate 3e matches the outer wall size of the flange at the end of the tower, so as to realize the adjustment of the clamping space of the clamping mechanism 2, and the double-axis cylinders 2b of the clamping mechanism 2 respectively drive the connected The first clamping claw 2a and the second clamping claw 2c move toward the flange at the same time until the flange is clamped; at the same time, the telescopic mechanism of the clamping mechanism 5 drives the adjusting plate 5a to adjust the diameter, that is, the cylinder drives the push rod 5d connected thereto to move downward, and the push rod 5d drives the moving plate 5c connected thereto to move downward, thereby making the second rotating plate 5f rotatably connected around the moving plate 5c extend outward, thereby driving the adjusting plates 5a connected thereto to extend outward, and the movement of the adjusting plate 5a simultaneously drives the second rotating plate 5f rotatably connected thereto to rotate, thereby further supporting the adjusting plate 5a, until the outer wall of the adjusting plate 5a fits against the inner wall of the tower, thereby achieving the clamping of the inner wall of the tower; finally, and so on, the above working process is repeated in sequence until the wind turbine tower 1 in the area is installed.

[0035] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A wind turbine tower (1) hoisting device, characterized in that: It comprises a connecting member (4) connected to a crane, one side of the connecting member (4) is connected to an adjusting mechanism (3), a plurality of clamping mechanisms (2) are arranged in a circular array between the adjusting mechanisms (3), and one side of the adjusting mechanism (3) is provided with a tightening mechanism (5); The adjustment mechanism (3) comprises a housing, a movement mechanism is arranged between the housings, a moving plate (3e) is meshedly connected between the moving mechanisms, and the moving plates (3e) are arranged in a plurality of groups along the circumference of the housing and are correspondingly connected to the clamping mechanism (2); The tightening mechanism (5) comprises a connecting plate connected to one side of the housing, a power module is arranged on one side of the connecting plate, a plurality of adjusting plates (5a) are arranged in a circumferential array of the power module, and the adjusting plates (5a) are connected to the power module via a telescopic mechanism; The adjusting mechanism (3) is used to adjust the clamping space between the clamping mechanism (2) and the outside of the tower, and the pressing mechanism (5) is used to clamp the inner wall of the tower.

2. The wind turbine tower (1) hoisting device according to claim 1, characterized in that: The motion mechanism comprises a motor (3c) arranged on one side of the housing, one side of the motor (3c) is connected to a first gear (3d), the first gear (3d) is arranged inside the housing, one side of the first gear (3d) is meshedly connected to a second gear (3f), both sides of the second gear (3f) are provided with tooth structures, the first gear (3d) is connected to the outer side of the second gear (3f), the inner side of the second gear (3f) is meshedly connected to a plurality of third gears (3g), the third gears (3g) are respectively connected inside the housing and meshedly connected to the moving plate (3e) accordingly.

3. The wind turbine tower (1) hoisting device according to claim 2, characterized in that: The telescopic mechanism comprises a cylinder arranged on one side of the connecting plate, the outer sleeve of the cylinder is provided with a sleeve (5e), ​​the top rod (5d) of the cylinder passes through the sleeve (5e) and is away from the connecting plate, and a moving plate (5c) is provided at one end, the moving plate (5c) has a plurality of first rotating plates (5b) in a circular array corresponding to the adjusting plate (5a), the outer wall of the sleeve (5e) has a plurality of second rotating plates (5f) in a linear array, and the second rotating plates (5f) behind the linear array are arranged in a plurality of groups along the circular array of the sleeve (5e) and corresponding to the adjusting plate (5a), and each group of the second rotating plates (5f) is rotatably connected to the adjusting plate (5a).

4. The wind turbine tower (1) hoisting device according to claim 3, characterized in that: The housing comprises an upper shell (3a) and a lower shell (3b); a support portion (31a) extending a preset distance from the middle of the upper shell (3a) to the end of the lower shell (3b); a through groove is provided at the connection between the outer wall of the upper shell (3a), the support portion (31a), the lower shell (3b) and the movable plate (3e); the movable plate (3e) slides along the through groove to adjust the clamping space of the clamping mechanism (2) on the movable plate (3e).

5. The wind turbine tower (1) hoisting device according to claim 4, characterized in that: The second gear (3f) is slidably connected to the outer wall of the upper shell.

6. The wind turbine tower (1) hoisting device according to claim 5, characterized in that: The third gear (3g) is rotatably connected between the upper shell and the lower shell via a rotating shaft, and is used to drive the movable plate (3e) to move.

7. The wind turbine tower (1) hoisting device according to claim 6, characterized in that: An anti-slip structure is provided on the outer wall of the adjustment plate (5a) for clamping the inner wall of the tower.

8. The wind turbine tower (1) hoisting device according to claim 7, characterized in that: The clamping mechanism (2) comprises a double-axis cylinder (2b), and a first clamping claw (2a) and a second clamping claw (2c) are respectively connected to two sides of the double-axis cylinder (2b), wherein the first clamping claw (2a) is connected to the movable plate (3e) and is used to clamp the flange at the end of the tower.

9. The wind turbine tower (1) hoisting device according to claim 8, characterized in that: A side of the first claw (2a) away from the adjustment mechanism (3) is flush with a side of the lower shell away from the adjustment mechanism (3).

10. The method for hoisting a wind turbine tower (1) according to any one of claims 1 to 9, characterized in that The following steps are involved: S1, connect the connecting piece (4) to the crane, place the jacking mechanism (5) into the interior of the tower until one end of the tower fits with one side of the lower shell, and then proceed to S2 and S3; S2, the adjusting mechanism (3) drives the moving mechanism to move, and the moving mechanism drives a plurality of movable plates (3e) connected thereto to perform circular telescopic movement along the outer shell until the clamping mechanism (2) on the movable plate (3e) matches the outer wall size of the flange at the end of the tower and clamps the flange, and then enters S4; S3, the telescopic mechanism of the tightening mechanism (5) drives the plurality of groups of adjusting plates (5a) connected thereto to respectively telescope in diameter until the outer wall of the adjusting plate (5a) is fitted and clamped against the inner wall of the tower, and then enters S4; S4, and so on, repeat S1 to S3 in sequence until the tower in the area is installed.

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