Portal crane for replacing a medium speed shaft in a fan gear box of a tower

Abstract

The utility model relates to gantry crane technical field, concretely relates to a gantry crane of medium speed shaft's replacement in fan gear box on tower, include: gantry crane body and support frame, the bottom of gantry crane body and the top of support frame fixed connection. The utility model discloses through setting up adjusting magnetic attraction subassembly and adsorption adjusting assembly etc. parts, the sliding block in adjusting magnetic attraction subassembly can adjust the position of electromagnetic block in the sliding groove, and the sliding block is inserted into the plug-in slot to can fix the sliding block, makes electromagnetic block fast adsorption tower cylinder metal structure, and the connecting block is inserted with fixed plate in adsorption adjusting assembly, and hydraulic cylinder promotes movable block to adjust vacuum chuck position, and locating block is locked connecting block under the action of spring, through the cooperation of parts, so that electromagnetic block and vacuum chuck can realize fast fixing without complicated bolt fastening, and further reaches the device can simplify the fixed process, reduces the demand of many people cooperation, shortens the fixed time -consuming, promotes the effect that the overall efficiency of tower operation.

Description

Technical Field

[0001] This utility model relates to the field of gantry crane technology, specifically to a gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower. Background Technology

[0002] The gantry crane used for replacing the intermediate speed shaft of a wind turbine gearbox is a specialized lifting device adapted to the space inside the wind turbine tower. It achieves stable support through its gantry structure, allowing for precise lifting and relocation of the gearbox intermediate speed shaft. This facilitates the disassembly of the old shaft and the installation of the new shaft on the tower, ensuring efficient and safe replacement operations and meeting the needs of working within the confined space inside the tower.

[0003] Utility model patent CN222877483U discloses a combined lifting tool for maintenance of gearboxes on wind turbine towers, including a first lifting tool structure, a second lifting tool structure, and a monorail trolley. The first lifting tool structure includes two sets of first support structures and two sets of second support structures. The height of the support structures is adjustable. The four sets of support structures are arranged at the four vertices of a rectangle, with identical sets of support structures symmetrically arranged. Two sets of first longitudinal beams are arranged in parallel, and each set of first longitudinal beams is fixed to one set of first support structures and one set of second support structures. In this utility model, by designing a combined lifting tool for tower replacement and coordinating with a construction plan, the combined lifting tool and its accessories can be installed inside the nacelle, allowing for the lifting and replacement of the medium-speed shaft and high-speed shaft components of the gearbox in a 2MW wind turbine to be completed inside the nacelle without the need for an external crane to open the nacelle cover for lifting.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: While existing gantry cranes can meet the basic hoisting requirements for replacing the intermediate speed shaft of a wind turbine gearbox on a tower, in actual use, their fixing operation process is complex, and multiple people are required to cooperate in completing multiple steps such as bolt tightening during the fixing process. Moreover, the space inside the tower is limited, the entire fixing process is time-consuming, and the operation is extremely cumbersome, which seriously affects the overall efficiency of tower operations. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a gantry crane for replacing the intermediate speed shaft of the wind turbine gearbox on the tower, which can effectively solve the problems of complex fixed operation process, need for multiple people to work together to tighten bolts and long time in the existing technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower, comprising: a gantry crane body and a support frame. The bottom of the gantry crane body is fixedly connected to the top of the support frame. An adjusting magnetic suction assembly is provided at the bottom of the support frame. The adjusting magnetic suction assembly includes an electromagnetic block. A sliding block is hinged to the top of the electromagnetic block. A moving groove is provided at the bottom of the support frame, and the interior of the moving groove is slidably connected to the surface of the sliding block. A moving block is slidably connected to the front of the sliding block. Several sets of insertion slots are provided on the rear side of the inner wall of the moving groove, and the moving block can be inserted into the interior of the insertion slot.

[0008] An adsorption adjustment assembly is rotatably connected to the bottom of the outer side of the support frame. The adsorption adjustment assembly includes a fixed plate, a connecting block is inserted into the outer side of the fixed plate, a movable block is hinged to the outer side of the connecting block via a hydraulic cylinder, a vacuum suction cup is hinged to the outer side of the movable block, a positioning block is inserted into the outer side of the connecting block, and the outer side of the positioning block is fixedly connected to the fixed plate via a spring. The outer side of the positioning block is inclined.

[0009] Furthermore, a permanent magnet plate is embedded and fixedly connected to the bottom of the support frame, and a magnetic shielding plate is slidably connected to the bottom of the support frame.

[0010] Furthermore, a support block is fixedly connected to the outer side of the magnetic shielding plate, and a sliding rod is inserted into the bottom of the magnetic shielding plate. The sliding rod is magnetically connected to the permanent magnet plate and can be inserted into the bottom of the support frame.

[0011] Furthermore, a fixing block is fixedly connected inside the insertion slot, the front of the fixing block is inserted into the back of the moving block, and the positioning block is magnetically connected to the moving block.

[0012] Furthermore, a positioning plate is inserted and connected to the top of the sliding block, and the positioning plate is fixedly connected to the inside of the support frame by a spring.

[0013] Furthermore, a connecting groove is provided on the outer side of the positioning block, an inclined block is telescopically connected inside the connecting groove, and a moving rod is fixedly connected to the outer side of the inclined block.

[0014] Furthermore, a number of support bars are fixedly connected to the bottom of the magnetic shielding plate, and anti-slip plates are fixedly connected to the bottom of the support bars.

[0015] Furthermore, two sets of lifting frames are fixedly connected to the outer side of the support frame, and support wheels are fixedly connected to the bottom of the lifting frames.

[0016] Beneficial effects

[0017] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0018] I. This utility model, by setting up components such as an adjustable magnetic suction component and an adsorption adjustment component, allows the sliding block in the magnetic suction component to slide within the moving groove to adjust the position of the electromagnetic block. The moving block can be fixed by inserting into the insertion slot, enabling the electromagnetic block to quickly adsorb the metal structure of the tower. The connecting block in the adsorption adjustment component is inserted into the fixing plate. The hydraulic cylinder pushes the movable block to adjust the position of the vacuum suction cup. The positioning block locks the connecting block under the action of the spring. Through the cooperation of the components, the electromagnetic block and the vacuum suction cup can be quickly fixed without the need for cumbersome bolt tightening. Thus, this device simplifies the fixing process, reduces the need for multiple people to work together, shortens the fixing time, and improves the overall efficiency of tower operations.

[0019] II. By setting components such as permanent magnet plates, magnetic shielding plates, and sliding rods, this utility model can enhance the attraction between the support frame and the tower by setting permanent magnet plates, magnetic shielding plates can block the magnetic force of permanent magnet plates, and sliding rods can be inserted into the bottom of the support frame to fix the position of magnetic shielding plates under the magnetic force of permanent magnet plates. Through the cooperation of these components, the magnetic force of permanent magnet plates can be flexibly controlled, thereby achieving the effect that this device can conveniently switch between attraction and movement states according to operational needs, and improve operational flexibility.

[0020] Third, by setting up components such as support bars, anti-slip plates, and lifting frames, the support bars enhance the strength of the magnetic shielding plate, the anti-slip plates increase friction, and the lifting frames facilitate the movement of the gantry crane through support wheels. Combined with the auxiliary fixation of vacuum suction cups, the cooperation of these components enables the gantry crane to operate stably and be easily adjusted in the limited space inside the tower, thereby achieving the effect of improving the overall stability and spatial adaptability of the device. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0023] Figure 2 This is a partial disassembled schematic diagram of the present invention;

[0024] Figure 3 This utility model Figure 2 An enlarged schematic diagram of point A in the middle;

[0025] Figure 4 This utility model Figure 2 A magnified diagram of point B in the middle.

[0026] Reference numerals in the attached drawings: 1. Gantry crane body; 2. Support frame; 3. Adjustable magnetic suction assembly; 31. Electromagnetic block; 32. Sliding block; 33. Moving slot; 34. Moving block; 35. Insertion slot; 4. Adsorption adjustment assembly; 41. Fixed plate; 42. Connecting block; 43. Movable block; 44. Vacuum suction cup; 45. Positioning block; 5. Permanent magnet plate; 6. Magnetic shielding plate; 7. Support block; 8. Sliding rod; 9. Fixed block; 10. Positioning plate; 11. Connecting slot; 12. Inclined block; 13. Moving rod; 14. Support bar; 15. Anti-slip plate; 16. Lifting frame; 17. Support wheel. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The present invention will be further described below with reference to the embodiments.

[0029] See attached document Figure 1-4A gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower includes: a gantry crane body 1 and a support frame 2. The bottom of the gantry crane body 1 is fixedly connected to the top of the support frame 2. An adjusting magnetic attraction assembly 3 is provided at the bottom of the support frame 2. The adjusting magnetic attraction assembly 3 includes an electromagnetic block 31. A sliding block 32 is hinged to the top of the electromagnetic block 31. A moving groove 33 is provided at the bottom of the support frame 2, and the interior of the moving groove 33 is slidably connected to the surface of the sliding block 32. A moving block 34 is slidably connected to the front of the sliding block 32. Several sets of insertion slots 35 are provided on the rear side of the inner wall of the moving groove 33. The movable block 34 can be inserted into the insertion slot 35. Adjusting the magnetic attraction assembly 3, the electromagnetic block 31 can generate magnetic force through energization, achieving rapid adsorption and fixation with the metal structure inside the tower. The sliding block 32, sliding within the movable slot 33, can flexibly adjust the position of the electromagnetic block 31 to adapt to different fixing point requirements. The movable block 34, inserted into the insertion slot 35, can limit and fix the adjusted sliding block 32, ensuring the stability of the electromagnetic block 31. A permanent magnet plate 5 is embedded and fixedly connected to the bottom of the support frame 2, and a magnetic shielding plate 6 is slidably connected to the bottom of the support frame 2. The permanent magnet plate 5 provides continuous magnetic force, enhancing the attraction between the support frame 2 and the metal surface inside the tower, thus improving the stability of the fixation. The sliding connection design of the magnetic shielding plate 6 allows it to be positioned between the permanent magnet plate 5 and the attraction surface, utilizing its magnetic shielding properties to block the magnetic lines of force of the permanent magnet plate 5. This allows for flexible control of the magnetic force of the permanent magnet plate 5 according to actual operational needs, facilitating the release of the magnetic force when the gantry crane needs to be moved. The operation is simple and convenient. A support block 7 is fixedly connected to the outer side of the magnetic shielding plate 6, and a sliding rod 8 is inserted into the bottom of the magnetic shielding plate 6. The sliding rod 8 is magnetically connected to the permanent magnet plate 5. The sliding rod 8 can be inserted into the bottom of the support frame 2. The support block 7 on the outside of the magnetic shielding plate 6 can support the bottom surface. The sliding rod 8 at the bottom of the magnetic shielding plate 6 is magnetically connected to the permanent magnet plate 5. When the magnetic shielding plate 6 needs to be slid, after the magnetic shielding plate 6 is adjusted to a suitable position, the sliding rod 8 will move upward under the magnetic force of the permanent magnet plate 5 and insert into the corresponding hole at the bottom of the support frame 2, thereby fixing the position of the magnetic shielding plate 6 and preventing it from shifting due to vibration and other factors during operation, thus ensuring the stability of the magnetic shielding effect. The electromagnetic block 31 is existing technology.

[0030] A fixing block 9 is fixedly connected inside the insertion slot 35. The front of the fixing block 9 is inserted into the back of the movable block 34. The positioning block 45 is magnetically connected to the movable block 34. The fixing block 9 can be inserted into the movable block 34, and the two are magnetically connected. After the movable block 34 is inserted into the insertion slot 35, it prevents the movable block 34 from loosening and falling out of the insertion slot 35 during operation vibration, ensuring the stability of the sliding block 32 and the electromagnetic block 31. A positioning plate 10 is inserted into the top of the sliding block 32. The positioning plate 10 communicates with the interior of the support frame 2. The positioning plate 10 on the top of the sliding block 32 is slidably connected to the inside of the support frame 2 via a spring-loaded connection. When the sliding block 32 needs to slide and adjust its position within the moving groove 33, the positioning plate 10 is moved upward to separate it from the top of the sliding block 32. After the sliding block 32 moves to the appropriate position, the movement of the positioning block 45 is released, causing the positioning block 45 to reset and be fixed to the top of the sliding block 32, thus enhancing the stability of the sliding block 32's position. Several sets of supports are fixedly connected to the bottom of the magnetic shielding plate 6. Support bars 14, with anti-slip plates 15 fixedly connected to their bottoms. Several sets of support bars 14 at the bottom of the magnetic shielding plate 6 enhance its structural strength, preventing deformation when supporting the weight of the gantry crane. The anti-slip plates 15 at the bottom of the support bars 14 are made of anti-slip material, increasing friction with the inner surface of the tower, preventing the gantry crane from sliding due to uneven force or vibration during operation, thus improving the overall stability of the gantry crane. Two sets of lifting frames 16 are fixedly connected to the outer side of the support frame 2. The bottom is fixedly connected with support wheels 17. The two sets of lifting frames 16 on the outside of the support frame 2 can adjust the height of the support wheels 17 by telescopic adjustment. When the gantry crane needs to be moved, the lifting frames 16 are lowered so that the support wheels 17 contact the ground and support the gantry crane, reducing the friction between the support frame 2 and the ground, making it easier to move the gantry crane in the limited space inside the tower. When the working position is reached, the lifting frames 16 are raised so that the support wheels 17 leave the ground, allowing the gantry crane to flexibly adapt to the space inside the tower, making it easy to adjust the working position and improving the flexibility of the operation.

[0031] An adsorption adjustment assembly 4 is rotatably connected to the bottom of the outer side of the support frame 2. The adsorption adjustment assembly 4 includes a fixed plate 41, a connecting block 42 inserted into the outer side of the fixed plate 41, a movable block 43 hinged to the outer side of the connecting block 42 via a hydraulic cylinder, a vacuum suction cup 44 hinged to the outer side of the movable block 43, and a positioning block 45 inserted into the outer side of the connecting block 42. The outer side of the positioning block 45 is fixedly connected to the fixed plate 41 via a spring, and the outer side of the positioning block 45 is inclined. In the adsorption adjustment assembly 4, the fixed plate 41 serves as the basic support, and the connecting block 42 can be easily inserted and fixed to the fixed plate 41, avoiding the situation where the vacuum suction cup 44 is inconvenient to use due to space limitations. The hydraulic cylinder can push the movable block 43 to extend and retract, thereby adjusting the position of the vacuum suction cup 44 so that it fits against the inner wall of the tower and achieves auxiliary fixation through vacuum adsorption. The positioning block 45 is locked into the connecting block 42 under the elastic force of the spring, which can lock the position of the connecting block 42. The inclined setting of the outer side of the positioning block 45 facilitates the connection. When the connecting block 42 moves, it presses against the positioning block 45, causing it to retract. After the connecting block 42 moves to the appropriate position, the positioning block 45 resets and inserts into the connecting block 42. The overall structure eliminates the need for cumbersome bolt tightening steps, reducing the need for multiple people to work together, significantly shortening the fixing time, and effectively improving the overall efficiency of tower operations. The outer side of the positioning block 45 has a connecting groove 11, and the inside of the connecting groove 11 is telescopically connected to an inclined block 12. The outer side of the inclined block 12 is fixedly connected to a moving rod 13. When it is necessary to adjust the position of the connecting block 42, the operator can pull the moving rod 13 to move the inclined block 12 within the connecting groove 11. The inclined block 12 will press against the positioning block 45 through the connecting groove 11, forcing the positioning block 45 to compress the spring and retract towards the inside of the fixing plate 41, thereby releasing the locking of the positioning block 45 to the connecting block 42. The moving rod 13 is released, and the positioning block 45 resets under the action of the spring force. The whole process does not require complicated operation, making it convenient for users to disassemble and fix the connecting block 42.

[0032] Working principle: When using the gantry crane on this tower to replace the intermediate speed shaft of the wind turbine gearbox, the height of the support wheel 17 must first be adjusted by the lifting frame 16 on the outside of the support frame 2. When it is necessary to move the equipment to the working position inside the tower;

[0033] First, by pulling the magnetic shielding plate 6, the magnetic shielding plate 6 is moved. At this time, the sliding rod 8 at the bottom of the magnetic shielding plate 6 moves upward under the magnetic force of the permanent magnet plate 5 and inserts into the bottom of the support frame 2, fixing the position of the magnetic shielding plate 6 to maintain the effect of no longer shielding the magnetic field. This allows the permanent magnet plate 5 at the bottom of the support frame 2 to continuously provide magnetic force, enhancing the adsorption stability with the metal surface of the tower, keeping the working position stable, and facilitating subsequent adjustments. When the support frame 2 contacts the inside of the tower, the support block 7 on the outside of the magnetic shielding plate 6, together with the support strip 14 and anti-slip plate 15 at the bottom, can enhance the structural strength of the magnetic shielding plate 6 and increase the friction with the tower surface through the anti-slip plate 15, preventing the equipment from sliding during operation. When it is necessary to release the adsorption, pull out the sliding rod 8 and push the magnetic shielding plate 6 to slide it between the permanent magnet plate 5 and the tower surface, using the magnetic shielding plate 6 to block the magnetic lines of force.

[0034] Then, the equipment is fixed. In the adjustment of the magnetic suction assembly 3, according to the position of the magnetic metal, the positioning plate 10 is first moved upward so that the positioning plate 10 is no longer inserted and fixed to the top of the sliding block 32. Then, the moving block 34 is pulled to move it so that the moving block 34 is separated from the insertion groove 35. Then, the sliding block 32 is pushed to slide in the moving groove 33 at the bottom of the support frame 2 to adjust the position of the electromagnetic block 31 so that it is aligned with the appropriate metal fixing point inside the tower. After the adjustment is completed, the moving block 34 on the front of the sliding block 32 is pushed so that it is inserted into the insertion groove 35 on the rear side of the inner wall of the moving groove 33. At the same time, the moving block 34 is inserted into the fixing block 9 in the insertion groove 35 and reinforced by magnetic connection, thereby locking the position of the sliding block 32. Then, the positioning plate 10 is no longer supported, so that the positioning plate 10 presses the top of the sliding block 32 under the action of the spring to enhance the stability of the fixing of the sliding block 32. At this time, the electromagnetic block 31 is energized so that it generates magnetic force and quickly adsorbs onto the metal structure of the tower, completing the fixing.

[0035] Subsequently, by lowering the lifting frame 16, the support wheel 17 contacts the tower ground and supports the overall structure. The support wheel 17 reduces the friction during movement, making it easier to flexibly adjust the equipment position in a limited space. After reaching the target position, the lifting frame 16 is raised to lift the support wheel 17 off the ground, allowing the bottom of the support frame 2 and related fixing components to contact the inner surface of the tower.

[0036] Meanwhile, depending on the usage requirements, whether or not to use the vacuum suction cup 44, when needed, the connecting block 42 is inserted into the outside of the fixing plate 41. During the movement of the connecting block 42, it presses the inclined positioning block 45, causing the positioning block 45 to compress the spring and retract towards the inside of the fixing plate 41. When the connecting block 42 reaches the appropriate position, the positioning block 45 resets under the action of the spring force and inserts into the connecting block 42, thereby locking the connecting block 42. Since the fixing block 9 can be rotatably connected, its angle position can be easily adjusted. Then, the hydraulic cylinder is controlled to push the movable block 43 to extend and retract, adjusting the position of the vacuum suction cup 44 hinged on the outside of the movable block 43 so that it fits tightly against the inner wall of the tower. The vacuum suction forms an auxiliary fixation. The double fixation structure eliminates the need for cumbersome bolt tightening steps, simplifying the fixation process.

[0037] If the position of the connecting block 42 needs to be adjusted, pull the moving rod 13 to move the tilting block 12 in the connecting groove 11. The tilting block 12 presses the positioning block 45 to retract it, which can release the lock on the connecting block 42. The operation is convenient and flexible, which not only ensures the stable operation of the equipment in the limited space of the tower, but also realizes the efficient switching between quick fixing and flexible adjustment, effectively improving the overall efficiency of replacing the medium speed shaft of the wind turbine gearbox on the tower. This technical solution is applicable to use in towers that can be magnetically attracted by the electromagnetic block 31.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower, comprising a gantry crane body (1) and a support frame (2), characterized in that: The bottom of the gantry crane body (1) is fixedly connected to the top of the support frame (2). The bottom of the support frame (2) is provided with an adjustment magnetic suction assembly (3). The adjustment magnetic suction assembly (3) includes an electromagnetic block (31). The top of the electromagnetic block (31) is hinged to a sliding block (32). The bottom of the support frame (2) is provided with a moving groove (33). The inside of the moving groove (33) is slidably connected to the surface of the sliding block (32). The front of the sliding block (32) is slidably connected to a moving block (34). The rear side of the inner wall of the moving groove (33) is provided with several sets of insertion grooves (35). The moving block (34) can be inserted into the inside of the insertion groove (35). The bottom of the outer side of the support frame (2) is rotatably connected to an adsorption adjustment component (4). The adsorption adjustment component (4) includes a fixed plate (41). A connecting block (42) is inserted into the outer side of the fixed plate (41). A movable block (43) is hinged to the outer side of the connecting block (42) via a hydraulic cylinder. A vacuum suction cup (44) is hinged to the outer side of the movable block (43). A positioning block (45) is inserted into the outer side of the connecting block (42). The outer side of the positioning block (45) is fixedly connected to the fixed plate (41) via a spring. The outer side of the positioning block (45) is inclined.

2. The gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower according to claim 1, characterized in that, A permanent magnet plate (5) is embedded and fixedly connected to the bottom of the support frame (2), and a magnetic shielding plate (6) is slidably connected to the bottom of the support frame (2).

3. A gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower, as described in claim 2, is characterized in that... A support block (7) is fixedly connected to the outside of the magnetic shielding plate (6), and a sliding rod (8) is inserted into the bottom of the magnetic shielding plate (6). The sliding rod (8) is magnetically connected to the permanent magnet plate (5), and the sliding rod (8) can be inserted into the bottom of the support frame (2).

4. A gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower, as described in claim 1, is characterized in that... The insertion slot (35) is internally fixedly connected to a fixing block (9), the front of the fixing block (9) is inserted into the back of the moving block (34), and the positioning block (45) is magnetically connected to the moving block (34).

5. A gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower, as described in claim 1, is characterized in that... The top of the sliding block (32) is connected to a positioning plate (10), and the positioning plate (10) is fixedly connected to the inside of the support frame (2) by a spring.

6. A gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower, as described in claim 1, is characterized in that... The positioning block (45) has a connecting groove (11) on its outer side, and an inclined block (12) is telescopically connected inside the connecting groove (11). A moving rod (13) is fixedly connected to the outer side of the inclined block (12).

7. A gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower, as described in claim 2, is characterized in that... The bottom of the magnetic shielding plate (6) is fixedly connected to several sets of support bars (14), and the bottom of the support bars (14) is fixedly connected to anti-slip plates (15).

8. A gantry crane for replacing the intermediate speed shaft of a wind turbine gearbox on a tower, as described in claim 1, is characterized in that... Two sets of lifting frames (16) are fixedly connected to the outside of the support frame (2), and support wheels (17) are fixedly connected to the bottom of the lifting frame (16).

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