Tower crane system for wind turbine maintenance

Abstract

The present invention relates to the technical field of wind turbine maintenance and construction equipment, and in particular to a tower crane system for wind turbine maintenance, comprising a tower crane, a bearing mechanism, an adjusting mechanism and a clamping mechanism. The tower crane has a base and a tower body. The bearing mechanism is used to be arranged between the foundation structure of the wind turbine and the base. The bearing mechanism includes a plurality of spaced-apart main hydraulic cylinders, and the rodless cavities of all the main hydraulic cylinders are connected to each other. The present invention utilizes the foundation structure of the wind turbine as a support point, and adopts a plurality of main hydraulic cylinders to support the tower body of the tower crane on the platform surface of the foundation structure, and then combines the clamping mechanism to connect the tower body with the tower frame, so that the tower crane can be fixed by relying on the wind turbine. After the wind turbine components for maintenance are transported to the operating waters by an operating ship, they are repaired and replaced by the tower crane supported on the foundation structure, thereby greatly reducing the cost of replacing and repairing components such as gear boxes, generators, and blades on the wind turbine.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine maintenance and construction equipment, in particular to a tower crane system used for wind turbine maintenance. Background Art

[0002] The main advantages of offshore wind farms are that they do not occupy land resources, are largely unaffected by topography, have higher wind speeds, more abundant wind energy resources, larger wind turbine capacity, and more annual utilization hours. However, offshore wind farm construction is also technically difficult, with construction costs generally 2 to 3 times that of onshore wind farms. Furthermore, offshore wind turbine maintenance is also very difficult. Therefore, reducing offshore wind turbine maintenance costs has become a highly practical and urgent issue facing the development of offshore wind power.

[0003] At present, when the gearbox, generator, blades and other components of an offshore wind turbine need to be replaced, it is necessary to rely on a water platform with a length of hundreds of meters installed in the operating waters to carry out the replacement and maintenance of the wind turbine components from the water platform. If necessary, an operating vessel is also required to assist in the construction, or a large operating vessel with a lifting device or a hoist is required to carry out the replacement and maintenance of the wind turbine components. The problem with this kind of water platform or large operating vessel for maintenance and replacement is that the cost of replacing and repairing the wind turbine components is very high. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem in the prior art that when the gearbox, generator, blades and other components of an offshore wind turbine need to be replaced, a large water platform needs to be built, resulting in high replacement and maintenance construction costs. A tower crane system for wind turbine maintenance is now provided.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a tower crane system for wind turbine maintenance, comprising:

[0006] The tower crane comprises a base and a tower body, wherein the tower body is fixedly mounted on the base;

[0007] A bearing mechanism is configured between the foundation structure and the base of the wind turbine generator set, the bearing mechanism comprising a plurality of spaced-apart master hydraulic cylinders, one of the cylinder body and piston rod of the master hydraulic cylinder being configured to contact the platform surface of the foundation structure, the other being configured to contact or be fixed to the lower surface of the base, and the rodless chambers of all the master hydraulic cylinders being interconnected;

[0008] And a clamping mechanism is used to clamp and fix the tower body on the tower of the wind turbine generator set.

[0009] Furthermore, the bearing mechanism also includes at least two first telescopic components that are telescopic along the length direction of the tower body, and the two ends of the first telescopic components in the telescopic direction are respectively in contact with or fixed to the platform surface and the base for supporting and limiting the base.

[0010] Furthermore, the first telescopic component is an electric push rod, a jack, a hydraulic cylinder or a support rod threadedly connected to the base.

[0011] Further, at least a portion of the master hydraulic cylinders are distributed at intervals along the circumference of the tower.

[0012] Furthermore, the base is an arc-shaped structure arranged around the tower.

[0013] Furthermore, the clasping mechanism comprises at least two clasping arms and at least one second telescopic assembly;

[0014] All the clasping arms can be spliced ​​into a closed loop structure sleeved outside the tower. The closed loop structure is fixed to the tower body. The second telescopic assembly is installed on the closed loop structure and can be extended to abut against the tower.

[0015] Furthermore, there are two clasping arms, and the two ends of the clasping arms are respectively a proximal end and a distal end;

[0016] The proximal ends of the clamping arms are rotatably mounted on the tower body, a locking hole is provided at the distal end of one clamping arm, and a locking pin and a locking pin driving device for driving the locking pin to move closer to or away from the locking hole are provided at the distal end of the other clamping arm. When the locking pin driving device drives the locking pin to be inserted into the locking hole, the two clamping arms form the closed-loop structure.

[0017] Furthermore, the clasping mechanism further includes a clasping arm driving device, which is used to drive the clasping arms to rotate so that the distal ends of the two clasping arms move closer to or away from each other.

[0018] Furthermore, the second telescopic component is an electric push rod, a hydraulic cylinder or a screw threadedly connected to the clamping arm.

[0019] Furthermore, it also includes a deviation adjustment mechanism;

[0020] The adjustment mechanism includes two retractable third telescopic components, one end of the third telescopic component in its telescopic direction is fixedly connected to the tower body, and the other end is rotatably installed with a roller for abutting the tower. The third telescopic component is used to drive the roller to move closer to or away from the tower.

[0021] Furthermore, the third telescopic component is an electric push rod, a hydraulic cylinder or a screw threadedly connected to the tower body.

[0022] The beneficial effects of the present invention are as follows: the tower crane system for wind turbine maintenance of the present invention utilizes the foundation structure of the wind turbine as a support point, and adopts multiple main hydraulic cylinders to support the tower body of the tower crane on the platform surface of the foundation structure, and then combines the tower body with the tower frame in combination with a clamping mechanism, so that the tower crane can be fixed on the wind turbine. In this way, when the wind turbine is repaired, it is only necessary to build a smaller water platform in the operating waters, and there is no need to build a costly water platform. After the wind turbine components for repair are transported to the operating waters by the operating vessel, they are repaired and replaced by the tower crane supported on the foundation structure, thereby greatly reducing the cost of replacing and repairing components such as the gearbox, generator, and fan blades on the wind turbine generator set; in addition, the rodless chambers of all the main hydraulic cylinders are connected to each other, so that each main hydraulic cylinder can be evenly stressed regardless of whether the tower body is vertical or tilted, thereby avoiding damage to the foundation structure of the wind turbine due to excessive local load, increasing the maximum load-bearing capacity of the tower crane, and each main hydraulic cylinder can also relatively evenly distribute the gravity load of the tower crane to the foundation structure, and can also accommodate the correction of the tower body.

[0023] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 is a schematic diagram of a tower crane system for wind turbine maintenance according to the present invention;

[0026] Figure 2 yes Figure 1 A partial enlarged schematic diagram;

[0027] Figure 3 It is a top view schematic diagram of the tower crane installed on the foundation structure;

[0028] Figure 4 This is a schematic diagram of the main view of the coordination between the clamping mechanism and the deviation adjustment mechanism and the tower;

[0029] Figure 5 It is a top view schematic diagram of the coordination between the clamping mechanism and the deviation adjustment mechanism and the tower;

[0030] Figure 6 This is a schematic diagram of two holding arms moving away from each other.

[0031] In the figure: 1, tower crane, 11, base, 12, tower body, 121, tower body standard section, 13, boom;

[0032] 2. Carrying mechanism, 21. Main hydraulic cylinder, 22. First telescopic assembly;

[0033] 3. Clamping mechanism, 31. Closed-loop structure, 311. Clamping arm, 311a. Locking hole, 32. Locking pin drive device, 33. Locking pin, 34. Second telescopic assembly, 35. Clamping arm drive device;

[0034] 4. Deflection adjustment mechanism, 41. Third telescopic component, 42. Roller;

[0035] 5. Wind turbine, 51. Foundation structure, 511. Platform surface, 52. Tower. DETAILED DESCRIPTION

[0036] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention only in a schematic manner. Therefore, they only show components relevant to the present invention, and directions and references (e.g., up, down, left, right, etc.) may be used solely to facilitate the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0037] Example 1

[0038] like Figure 1-6 As shown, a tower crane system for wind turbine maintenance includes a tower crane 1, a carrying mechanism 2, and a clamping mechanism 3;

[0039] The tower crane 1 comprises a base 11 and a tower body 12. The tower body 12 is fixedly mounted on the base 11. The tower body 12 is specifically composed of a lifting frame and a plurality of tower body standard sections 121. The top of the tower body 12 is provided with a boom 13, a luffing mechanism and a slewing mechanism. A ladder is provided inside the tower body 12 for workers to climb to the top of the tower body 12.

[0040] The offshore wind turbine 5 includes a base structure 51, a tower 52, a nacelle, and blades. The base structure 51 is fixedly installed on the seabed, the tower 52 is fixed on the base structure 51, the nacelle is fixed on the top of the tower 52, and the blades are arranged on the nacelle.

[0041] The supporting mechanism 2 is configured between the foundation structure 51 of the wind turbine 5 and the base 11. The supporting mechanism 2 includes a plurality of spaced-apart master hydraulic cylinders 21. One of the cylinder body and piston rod of the master hydraulic cylinder 21 is configured to contact or be fixed to the platform surface 511 of the foundation structure 51, and the other is configured to contact or be fixed to the lower surface of the base 11. The rodless chambers of all the master hydraulic cylinders 21 are interconnected.

[0042] The clamping mechanism 3 is used to clamp and fix the tower body 12 on the tower 52 of the wind turbine 5 .

[0043] The tower crane system uses the foundation structure 51 of the wind turbine 5 as a support point, and adopts multiple main hydraulic cylinders 21 to support the tower body 12 of the tower crane 1 on the platform surface 511 of the foundation structure 51, and then combines the clamping mechanism 3 to connect the tower body 12 with the tower frame 52, so that the tower crane 1 can be fixed on the wind turbine 5. In this way, when the wind turbine 5 is repaired, it is only necessary to build a smaller water platform in the operating waters, and there is no need to build an expensive water platform. The wind turbine 5 parts for repair are transported to the operating waters by the operating ship and then carried out by the tower crane 1 supported on the foundation structure 51. Maintenance and replacement operations are carried out, thereby greatly reducing the cost of replacing and repairing components such as gear boxes, generators, and fan blades on wind turbines; in addition, the rodless chambers of all master hydraulic cylinders 21 are connected to each other, so that each master hydraulic cylinder 21 can be evenly stressed regardless of whether the tower body 12 is vertical or tilted, which can avoid damage to the foundation structure 51 of the wind turbine 5 due to excessive local load, increase the maximum bearing load of the tower crane 1, and each master hydraulic cylinder 21 can also relatively evenly distribute the gravity load of the tower crane 1 to the foundation structure 51, and is also compatible with the adjustment of the angle between the tower body 12 and the horizontal plane.

[0044] As an example, the supporting mechanism 2 also includes at least two first telescopic components 22 that can be telescoped along the length direction of the tower body 12, and the two ends of the first telescopic component 22 in its telescopic direction are respectively in contact with or fixed to the platform surface 511 and the base 11, that is, one end of the first telescopic component 22 in its telescopic direction is in contact with or fixed to the base 11, and the other end of the first telescopic component 22 in its telescopic direction is in contact with or fixed to the platform surface 511, which is used to support and limit the base 11; when the angle of the tower body 12 is adjusted, the tower body 12 is supported by the main hydraulic cylinder 21, so that the angle of the tower body 12 relative to the horizontal plane can be freely adjusted. After the angle of the tower body 12 is determined, the first telescopic component 22 is extended to support between the base 11 and the basic structure 51 to prevent the base 11 from tilting, thereby fixing the angle between the tower body 12 and the platform surface 511. Figure 3 As shown, there may be three first telescopic components 22 , one first telescopic component 22 is located in the middle of the base 11 , and the remaining two first telescopic components 22 are located at both ends of the base 11 , which can improve the stability of the support for the tower crane base 11 .

[0045] Specifically, the first telescopic assembly 22 may be, but is not limited to, an automatic telescopic structure such as an electric push rod, a jack, or a hydraulic cylinder. For example, when the first telescopic assembly 22 is an electric push rod, one end of the electric push rod is fixed to the base 11, and the other end is in contact with the platform surface 511 of the base structure 51. When the first telescopic assembly 22 is a jack, one end of the jack is fixed to the base 11, and the other end is in contact with the platform surface 511 of the base structure 51. When the first telescopic assembly 22 is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed to the base 11, and the piston rod of the hydraulic cylinder is in contact with the platform surface 511 of the base structure 51.

[0046] The first telescopic component 22 may also be a manual telescopic structure. For example, the first telescopic component 22 is a support rod threadedly connected to the base 11 , so that when the support rod is manually rotated, the support rod can be telescoped relative to the base 11 .

[0047] As an example, at least a portion of the main hydraulic cylinders 21 are distributed at intervals along the circumference of the tower 52, so as to better disperse the gravity load of the tower crane 1 to the foundation structure 51. Furthermore, the base 11 is an arc-shaped structure arranged around the tower 52, and can also be a semicircular structure arranged around the tower 52.

[0048] As an example, the clasping mechanism 3 includes at least two clasping arms 311 and at least one second telescopic assembly 34;

[0049] The second telescopic assembly 34 is mounted on the closed loop structure 31 and can be extended to abut against the tower 52, thereby achieving the goal of clamping the tower 52. The telescopic direction of the second telescopic assembly 34 can be specifically set along the radial direction of the tower 52. When there is only one second telescopic assembly 34, one side of the tower 52 abuts against the holding arm 311, and the other side abuts against the second telescopic assembly 34. Preferably, there are at least three second telescopic assemblies 34, which are distributed at intervals along the circumference of the closed loop structure 31. Furthermore, two second telescopic assemblies 34 are distributed on each holding arm 311. In this way, the tower 52 can be clamped by the cooperation of the second telescopic assemblies 34, that is, the tower 52 can be clamped without the holding arm 311 directly contacting the tower 52.

[0050] Specifically, the second telescopic assembly 34 can be an automatic telescopic mechanism such as an electric push rod or a hydraulic cylinder. For example, when the second telescopic assembly 34 is an electric push rod, one end of the electric push rod is fixed to the clamping arm 311, and the other end faces the tower 52; when the second telescopic assembly 34 is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed to the clamping arm 311, and the piston rod of the hydraulic cylinder faces the tower 52.

[0051] The second telescopic component 34 may also be a manual telescopic structure. For example, the second telescopic component 34 is a screw threadedly connected to the clamping arm 311 . When the screw is manually rotated, the screw can be telescoped relative to the base 11 .

[0052] As an example, Figure 3-6 As shown, there are two holding arms 311, and the two ends of the holding arms 311 are respectively a proximal end and a distal end;

[0053] The proximal ends of the clasping arms 311 are rotatably mounted on the tower body 12. A locking hole 311a is provided at the distal end of one clasping arm 311, and a locking pin 33 and a locking pin driving device 32 for driving the locking pin 33 toward or away from the locking hole 311a are provided at the distal end of the other clasping arm 311. When the two clasping arms 311 are rotated until the locking hole 311a is aligned with the locking pin 33, the locking pin driving device 32 drives the locking pin 33 to be inserted into the locking hole 311a, so that the two clasping arms 311 are fixed to each other, and the two clasping arms 311 form a closed loop structure 31. Conversely, when the locking pin driving device 32 drives the locking pin 33 to separate from the locking hole 311a, the two clasping arms 311 can rotate again.

[0054] The two clamping arms 311 of the clamping mechanism 3 are rotatably mounted on the tower body 12 to form a closed loop structure 31. Meanwhile, the connection strength of the clamping arms 311 can be improved by inserting the locking pin 33 into the locking hole 311a.

[0055] As an example, the clamping arm 311 can be manually pushed until the locking pin 33 is aligned with the locking hole 311a, or it can be automatically rotated until the locking pin 33 is aligned with the locking hole 311a. For example, the clamping mechanism 3 also includes a clamping arm driving device 35, which is used to drive the clamping arm 311 to rotate, so that the distal ends of the two clamping arms 311 move closer to or away from each other, thereby realizing the automatic rotation of the clamping arm 311 driven by the clamping arm driving device 35; in this embodiment, each clamping arm 311 is driven by a corresponding clamping arm driving device 35, and the clamping arm driving device 35 can specifically adopt a motor or a rotary cylinder, and the motor or rotary cylinder drives the clamping arm 311 to rotate; or, the clamping arm driving device 35 can specifically adopt a linear driving mechanism that can reciprocate in a straight line direction, one end of the linear driving mechanism is hinged to the tower body 12, and the other end is hinged to the clamping arm 311, for example, the linear driving mechanism is specifically a hydraulic cylinder or an electric push rod.

[0056] As an example, it also includes an adjustment mechanism 4; the adjustment mechanism 4 includes two retractable third telescopic components 41, and the telescopic directions of the two third telescopic components 41 can be specifically arranged to cross each other. For example, the distance between the two third telescopic components 41 near one end of the tower body 12 is less than the distance between the two third telescopic components 41 near one end of the tower frame 52. One end of the third telescopic component 41 in its telescopic direction is fixedly connected to the tower body 12, and the other end is rotatably installed with a roller 42 for abutting against the tower frame 52. The third telescopic component 41 is used to drive the roller 42 to move closer to or away from the tower frame 52. When the clamping mechanism 3 is released, by controlling the extension or shortening of the third telescopic component 41, since the position of the tower frame 52 is fixed, the position of the tower body 12 and the third telescopic component 41 will move, thereby realizing the deviation of the position of the tower body 12. Secondly, the roller 42 can reduce the friction between the third telescopic component 41 and the tower frame 52 to prevent the outer surface of the tower frame 52 from being scratched.

[0057] Specifically, the third telescopic assembly 41 can be an automatic telescopic mechanism such as an electric push rod or a hydraulic cylinder. For example, when the second telescopic assembly 34 is an electric push rod, one end of the electric push rod is fixed to the tower body 12, and the other end faces the tower 52; when the second telescopic assembly 34 is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed to the tower body 12, and the piston rod of the hydraulic cylinder faces the tower 52;

[0058] The third telescopic component 41 can also be a manual telescopic structure. For example, the third telescopic component 41 is a screw with one end threadedly connected to the tower 52, and the other end of the screw is rotated to install the roller 42. When the screw is manually rotated, the screw can be extended and retracted relative to the tower body 12.

[0059] It is worth noting that Figure 4 As shown, a clamping mechanism 3 can be respectively configured at the upper and lower ends of a tower body standard section 121, and an adjustment mechanism 4 can also be configured on the tower body standard section 121; multiple clamping mechanisms 3 can be distributed on the tower body 12 along its height direction to improve the stability of the tower crane 1.

[0060] The working principle of the tower crane system for wind turbine maintenance is as follows:

[0061] The base 11 of the tower crane 1 is installed on the platform surface 511 of the foundation structure 51, and each master hydraulic cylinder 21 is supported between the platform surface 511 and the base 11;

[0062] The tower body standard sections 121 on the base 11 are assembled into the tower body 12, and the boom 13, luffing mechanism, and slewing mechanism are assembled at the top of the tower body 12. During this process, the clasping arm driving device 35 of the clasping mechanism 3 drives the clasping arms 311 to rotate. When the two clasping arms 311 rotate until the locking holes 311a are aligned with the locking pin 33, the locking pin driving device 32 drives the locking pin 33 to be inserted into the locking hole 311a, thereby fixing the two clasping arms 311 to each other and forming a closed loop structure 31.

[0063] Among them, when the tower body 12 is corrected, the first telescopic component 22 is not supported between the base 11 and the platform surface 511 of the basic structure 51, the second telescopic component 34 of the clamping mechanism 3 is separated from the tower frame 52, and then the extension or shortening of the third telescopic component 41 is controlled, and the roller 42 on the third telescopic component 41 is against the tower frame 52. Since the position of the tower frame 52 is fixed, the position of the tower body 12 and the third telescopic component 41 will move, thereby realizing the adjustment of the position of the tower body 12, so that the tower body 12 is roughly perpendicular to the horizontal plane. During the adjustment process, each main hydraulic cylinder 21 can adaptively extend or shorten, but always supports the tower body 12 with uniform force. It is worth noting that when there are two or more second telescopic components 34, by adjusting the second telescopic components The extension and retraction of 34 can also adjust the tower body 12; after the tower body 12 is adjusted, the first telescopic component 22 is extended to support between the base 11 and the foundation structure 51, and the base 11 cannot deflect freely relative to the platform surface 511. At the same time, the second telescopic component 34 is extended to support the tower frame 52, and the tower frame 52 is tightly held, and finally the tower crane 1 is fixed to the wind turbine 5. In this way, when the wind turbine 5 is repaired, it is only necessary to build a smaller water platform in the operating waters, and there is no need to build an expensive water platform. After the wind turbine 5 parts for repair are transported to the operating waters by the operating ship, they can be repaired and replaced by the tower crane 1 supported on the foundation structure 51, thereby greatly reducing the cost of replacing and repairing parts such as the gearbox and generator on the wind turbine.

[0064] The above description of the preferred embodiments of the present invention is intended to serve as a guide. Based on the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A tower crane system for wind turbine maintenance, characterized by: include: A tower crane (1) comprises a base (11) and a tower body (12), wherein the tower body (12) is fixedly mounted on the base (11); A bearing mechanism (2) is configured between a foundation structure (51) and a base (11) of a wind turbine generator set (5), the bearing mechanism (2) comprising a plurality of spaced-apart master hydraulic cylinders (21), one of a cylinder body and a piston rod of the master hydraulic cylinder (21) being in contact with a platform surface (511) of the foundation structure (51), and the other being in contact with or fixed to a lower surface of the base (11), and the rodless chambers of all the master hydraulic cylinders (21) being in communication with one another; and a clamping mechanism (3) for clamping and fixing the tower body (12) on the tower frame (52) of the wind turbine generator set (5); The clasping mechanism (3) comprises at least two clasping arms (311) and at least two second telescopic assemblies (34); All the clasping arms (311) can be spliced ​​together to form a closed-loop structure (31) sleeved outside the tower (52); the closed-loop structure (31) is fixed to the tower body (12); the second telescopic assembly (34) is mounted on the closed-loop structure (31) and can be extended to abut against the tower (52); It also includes a deviation adjustment mechanism (4); The deflection adjustment mechanism (4) includes two telescopic third telescopic components (41), one end of the third telescopic component (41) in the telescopic direction is fixedly connected to the tower body (12), and the other end is rotatably mounted with a roller (42) for contacting the tower (52), and the third telescopic component (41) is used to drive the roller (42) to move closer to or away from the tower (52).

2. The tower crane system for wind turbine maintenance according to claim 1, characterized in that: The bearing mechanism (2) further comprises at least two first telescopic assemblies (22) that are telescopic along the length direction of the tower body (12), wherein the first telescopic assemblies (22) are respectively in contact with or fixed to the platform surface (511) and the base (11) at both ends in the telescopic direction thereof, and are used for supporting and limiting the base (11).

3. The tower crane system for wind turbine maintenance according to claim 2, characterized in that: The first telescopic component (22) is an electric push rod, a jack, a hydraulic cylinder, or a support rod threadedly connected to the base (11).

4. The tower crane system for wind turbine maintenance according to claim 1, characterized in that: At least a portion of the master hydraulic cylinders (21) are distributed at intervals along the circumference of the tower (52).

5. The tower crane system for wind turbine maintenance according to claim 4, characterized in that: The base (11) is an arc-shaped structure arranged around the tower (52).

6. The tower crane system for wind turbine maintenance according to claim 1, characterized in that: There are two clasping arms (311), and the two ends of the clasping arms (311) are respectively a proximal end and a distal end; The proximal ends of the clamping arms (311) are rotatably mounted on the tower body (12); a locking hole (311a) is provided at the distal end of one clamping arm (311); and a locking pin (33) and a locking pin driving device (32) for driving the locking pin (33) to move closer to or away from the locking hole (311a) are provided at the distal end of the other clamping arm (311); when the locking pin driving device (32) drives the locking pin (33) to be inserted into the locking hole (311a), the two clamping arms (311) form the closed loop structure (31).

7. The tower crane system for wind turbine maintenance according to claim 6, characterized in that: The clamping mechanism (3) further comprises a clamping arm driving device (35), wherein the clamping arm driving device (35) is used to drive the clamping arms (311) to rotate, so that the distal ends of the two clamping arms (311) move closer to or farther away from each other.

8. The tower crane system for wind turbine maintenance according to claim 1, characterized in that: The second telescopic component (34) is an electric push rod, a hydraulic cylinder, or a screw threadedly connected to the clamping arm (311).

9. The tower crane system for wind turbine maintenance according to claim 1, characterized in that: The third telescopic assembly (41) is an electric push rod, a hydraulic cylinder, or a screw threadedly connected to the tower body (12).

Images