Turnover hoisting system for tower crane of wind generating set

Abstract

The invention discloses a turnover hoisting system for a tower crane of a wind generating set, which belongs to the technical field of stainless steel plate processing and comprises a fan shield fixedly mounted on a tower. A lifting platform used for bearing and installing a lifting system is arranged on the surface of the fan shield, the center positions of the upper surface and the lower surface of the lifting platform are rotationally connected with an adjusting rotating disc through the same shaft, and a large lifting arm is installed at the position of the adjusting rotating disc. And the bottom of the inner side of the large hoisting arm is fixedly connected with two guide supporting plates which are symmetrically arranged. By arranging the windproof barrel structure, a hoisted object can be fully pulled up to the position above the hoisting platform, manual dragging is not needed, the labor intensity of hoisting work is reduced, when the windproof barrel structure is stored, the hoisted and stretched steel cable can be folded, the steel cable winding wheel continues to wind, and the hoisting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of crane structure, and particularly relates to a turnover hoisting system for a tower crane of a wind turbine generator system. BACKGROUND

[0002] The wind turbine generator converts wind energy into mechanical energy through the rotation of wind wheel blades, and the rotation of the wind wheel shaft connected to the rotor causes the rotor to rotate. The magnetic field generated by the rotation of the rotor passes through the coil, and electricity is generated through electromagnetic induction principle, realizing the conversion from wind energy to mechanical energy and then to electrical energy.

[0003] In the prior art, when the wind turbine generator is being built, the nacelle cover needs to be fixed on the tower, and the corresponding wind wheel shaft, impeller, generator and related control system are fixed and installed in the nacelle cover. These devices need to be installed by lifting, and the traditional lifting installation usually uses a crane or a hoist. The crane is usually fixed at the position of the nacelle cover, and then the lifting is performed by the crane. This lifting structure causes the lifted goods to be located below the lifting platform, which requires manual pulling of the lifted goods, resulting in high labor intensity and certain safety hazards. Moreover, when the goods are manually pulled, the lifted goods may collide with the nacelle cover, causing damage. In addition, when the lifted goods are flush with the nacelle cover, the collision between the lifted goods and the nacelle cover may also occur due to strong wind in the air. The hoist is more convenient for assembling small wind turbine generators, but the lifting arm of the hoist is not long enough for assembling large wind turbine generators, which has certain limitations. SUMMARY

[0004] The present application aims to overcome the above-mentioned shortcomings of the prior art and provide a lifting device that is stable and convenient for assembly.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: a turnover hoisting system for a tower crane of a wind turbine generator system, comprising a wind turbine cover fixedly installed on a tower, wherein the surface of the wind turbine cover is provided with a lifting platform for bearing and installing the hoisting system, the upper surface and the lower surface of the lifting platform are rotatably connected to an adjusting rotating disc at the center position through the same shaft, and the adjusting rotating disc is provided with a lifting large arm.

[0006] Through the above-mentioned technical solution, the wind turbine cover can fix and install the lifted goods and protect them. The adjusting rotating disc can rotate on the surface of the lifting platform, which facilitates the placement of the lifted goods on the surface of the lifting platform, reduces the labor intensity, and makes the lifting work safer. The lifting large arm can expand the working range and rotate the lifted goods.

[0007] The lifting large arm is fixedly connected to two symmetrically arranged guide support plates at the inner bottom, and a windproof cylinder structure is arranged on the side away from the lifting platform below the lifting large arm to avoid wind-induced swinging.

[0008] Through the above technical solution, the guide support plate can support and install the windproof tube structure, and the windproof tube structure can effectively prevent the hoisted object from colliding with the fan shield under the action of wind when it rises to be parallel to the fan shield, making the hoisted object safer during the lifting process.

[0009] Furthermore, the wind shield structure includes a wind shield main body, and notches are provided on the top side of the wind shield main body away from the lifting platform and on the bottom side close to the lifting platform, and support guide wheels are fixedly installed at the notch position, and two symmetrically arranged rotating guard plates are rotatably connected to the upper position of the outer wall of the wind shield main body, and the rotating guard plate position is rotatably connected with a guide support shaft.

[0010] Through the above technical solution, the wind shield main body can pass through the lifting and stretching steel cable, and the lifting and stretching steel cable inside the wind shield main body will not shake widely. When the wind shield main body is retracted, the lifting and stretching steel cable will not rub against the opening position of the wind shield main body, which effectively protects the lifting and stretching steel cable. The rotating guard plate ensures that the wind shield main body is always installed in the guide support plate position.

[0011] Furthermore, guide arc grooves are provided on the inner sides of the two guide support plates, and both ends of the guide support shaft are slidably connected to the inner walls of the guide arc grooves at corresponding positions.

[0012] Through the above technical solution, the guide arc groove can cause the guide support shaft to slide when it is pulled, so that the wind shield body and the corresponding horizontal positioning reinforcement ribs slide and rub, and the wind shield body is pulled into the lifting arm, so that the hoisted object is further pulled up, and when the wind shield body is pulled back into the lifting arm, the lifting and stretching steel cable will fold at the lifting arm position, and at this time the cable reel continues to reel in the lifting and stretching steel cable, which effectively improves the lifting speed of the hoisted object.

[0013] Furthermore, a steel cable reel is fixedly connected to the middle position of the upper surface of the lifting platform away from the lifting arm, a second guide wheel is fixedly connected to the upper surface of the lifting platform away from the steel cable reel, a third guide wheel is fixedly connected to the inner top wall of the lifting arm away from the steel cable reel and directly above the windproof tube structure, a reduction motor is fixedly connected to the upper surface of the lifting platform close to the steel cable reel, and the output end of the reduction motor is fixedly connected to the rotating shaft of the steel cable reel.

[0014] Through the above technical solution, the wire rope reel rotates forward and reverse under the power of the reduction motor, so that the lifting and stretching wire rope can be reeled in or released. The second guide wheel and the third guide wheel can support and guide the lifting and stretching wire rope, making the reeling or releasing of the lifting and stretching wire rope smoother without sliding friction, thereby effectively protecting the lifting and stretching wire rope.

[0015] Furthermore, the cable reel is fixedly connected to a lifting and stretching cable, and the lifting and stretching cable passes through the lower position of the second guide wheel at one end away from the cable reel, and then passes through the upper position of the third guide wheel, and then passes through the wind shield body and is fixedly connected to a hook.

[0016] Through the above technical solution, the hook at the position of lifting the stretching steel cable can fix the lifted object and lift or lower the lifted object.

[0017] Furthermore, the surface of the adjusting rotating disk is fixedly connected to a rotating base, the lifting arm is rotatably connected to the rotating base, and the bottom position of the lifting arm is fixedly connected to a number of evenly distributed arm reinforcement ribs, and the outer wall of the arm reinforcement ribs is wrapped with a graphite coating.

[0018] Through the above technical solution, the rotating base allows the lifting arm to rotate, so that the hoisted object is pulled to a position above the lifting platform, effectively reducing the labor intensity of the lifting work. The arm reinforcement ribs make the lifting arm stronger and more adaptable to the weight of the hoisted object. The graphite coating lubricates smoothly when the windproof tube body rubs against it, and the graphite coating is more wear-resistant.

[0019] Furthermore, a cable through hole is provided on the upper surface of the adjusting rotating disk near the cable winding wheel. A fourth guide wheel is fixedly connected to the upper surface of the adjusting rotating disk at the position of the cable through hole. A first guide wheel is fixedly connected to the lower surface of the adjusting rotating disk at the position of the cable through hole. An adjusting winch is fixedly connected to the middle position of the lower surface of the adjusting rotating disk.

[0020] Through the above technical solution, the lifting platform is provided with a 90-degree symmetrical through-groove at the position of the steel cable through-hole, so that the adjusting rotating disk will not get stuck in the stretched lifting steel cable when rotating and adjusting. The fourth guide wheel and the first guide wheel have the function of supporting and guiding the stretched lifting steel cable, so that the stretched lifting steel cable runs smoothly. The adjusting winch can reel in the stretched lifting steel cable, and when the guide support shaft moves to the side of the guide arc groove close to the fourth guide wheel, the lifting boom will flip upward to further stretch the hoisted object. When the adjusting winch rotates in the opposite direction, the wind shield body is reset under the action of gravity.

[0021] Furthermore, the position of the adjusting winch turntable is fixedly connected with a stretching lifting cable, and the stretching lifting cable with one end away from the adjusting winch passes around the bottom of the first guide wheel, then passes through the cable through hole and passes around the position above the fourth guide wheel, and the stretching lifting cable with one end away from the adjusting winch is rotatably connected to the guide support shaft through a rotating ring.

[0022] Furthermore, two symmetrically arranged fixed support arms are rotatably connected to both sides of the lifting platform, and clamping grooves are provided at both ends of the two fixed support arms. The thickness of the clamping grooves is greater than the thickness of the side walls of the fan guard. A lifting groove is provided on the upper surface of the lifting platform below the lifting arm, and a number of evenly distributed horizontal positioning reinforcement ribs are fixedly connected to the lower surface of the lifting platform.

[0023] Through the above technical solution, the fixed support arm makes the stress of the lifting platform on the fan guard more evenly dispersed, avoiding stress concentration causing damage to the fan guard. The lifting groove allows the lifting object to pass through this position and rise to the position above the lifting platform.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention provides a windproof tube structure, and the part of the lifting and stretching steel cable located at the fan guard can be protected so that it will not swing widely under the action of wind. When the hoisted object is hoisted, it will not hit the fan guard due to wind shaking, thereby effectively protecting the hoisted object and the fan guard; (2) The present invention cooperates with the windproof tube structure and the guide support plate. When the hoisted object is pulled to the bottom of the windproof tube structure, the windproof tube structure can be stored and folded into the lifting boom, and the lifting and stretching steel cable will also be recovered and folded when the windproof tube structure is stored and folded. In the folding process, the lifting and stretching steel cable will continue to be reeled in, thereby effectively improving the lifting efficiency of the hoisted object, and the hoisted object can be lifted to a position above the lifting platform. When the hoisted object is flush with the fan guard, no manual dragging is required, thereby reducing the labor intensity of hoisting and improving the safety of hoisting; (3) The overall structure of the present invention is a split assembly structure, and many components can be carried separately into the fan guard for assembly. It is simple and convenient to use and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram from a first perspective of a flip hoisting system for a wind turbine tower crane according to the present invention; Figure 2 This is a structural diagram from a second perspective of a flip hoisting system for a wind turbine tower crane according to the present invention; Figure 3 This is a structural diagram from a first perspective of a lifting platform of a turnover lifting system for a wind turbine tower crane according to the present invention; Figure 4 This is a structural diagram from a second perspective of a lifting platform of a turnover lifting system for a wind turbine tower crane according to the present invention; Figure 5 This is a structural diagram of a lifting boom of a turnover lifting system for a wind turbine tower crane according to the present invention; Figure 6 This is a diagram of a lifting boom of a turnover lifting system for a wind turbine tower crane according to the present invention; Figure 7 The present invention is a three-dimensional structural diagram of a windproof tube of a turnover hoisting system for a tower crane of a wind turbine generator set.

[0026] Figure numerals: 1. Fan guard; 2. Lifting platform; 3. Lifting boom; 4. Wind shield structure; 40. Wind shield main body; 41. Support guide wheel; 42. Rotating guard plate; 43. Guide support shaft; 5. Lifting and stretching steel cable; 6. Steel cable reel; 7. Reducer motor; 8. Fixed support arm; 9. Adjusting rotating disk; 10. Adjusting winch; 11. First guide wheel; 12. Horizontal positioning reinforcement rib; 13. Boom reinforcement rib; 14. Guide support plate; 15. Stretching and lifting steel cable; 16. Second guide wheel; 17. Third guide wheel; 18. Guide arc groove; 19. Clamping groove; 20. Lifting groove; 21. Fourth guide wheel; 22. Steel cable through hole; 23. Rotating base. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] like Figures 1-7 As shown, the present embodiment is a flip hoisting system for a tower crane of a wind turbine generator set, comprising a wind turbine guard 1 fixedly mounted on a tower, a hoisting platform 2 for carrying and installing the hoisting system being provided on the surface of the wind turbine guard 1, an adjusting rotary disk 9 being rotatably connected to the center positions of the upper and lower surfaces of the hoisting platform 2 via the same axis, a hoisting boom 3 being installed at the position of the adjusting rotary disk 9, the wind turbine guard 1 can fix and install the hoisted object and provide protection, the adjusting rotary disk 9 can rotate on the surface of the hoisting platform 2, making it convenient to place the hoisted object on the surface of the hoisting platform 2, eliminating the need for manual dragging of the hoisted object, reducing labor intensity, and making the hoisting work safer, and the hoisting boom 3 can expand the working range and hoist and rotate the hoisted object.

[0029] Two symmetrically arranged fixed support arms 8 are rotatably connected to both sides of the lifting platform 2. Clamping grooves 19 are provided at both ends of the two fixed support arms 8. The thickness of the clamping grooves 19 is greater than the thickness of the side wall of the fan guard 1. A lifting groove 20 is provided on the upper surface of the lifting platform 2 below the lifting arm 3. A number of evenly distributed horizontal positioning reinforcement ribs 12 are fixedly connected to the lower surface of the lifting platform 2. The fixed support arms 8 make the stress of the lifting platform 2 on the fan guard 1 more evenly dispersed, avoiding stress concentration and causing damage to the fan guard 1. The lifting groove 20 allows the lifted object to pass through this position and rise to the upper position of the lifting platform 2.

[0030] A cable through hole 22 is provided on the upper surface of the adjusting rotating disk 9 near the side of the cable winding wheel 6. The upper surface of the adjusting rotating disk 9 is fixedly connected to the fourth guide wheel 21 at the position of the cable through hole 22. The lower surface of the adjusting rotating disk 9 is fixedly connected to the first guide wheel 11 at the position of the cable through hole 22. The middle position of the lower surface of the adjusting rotating disk 9 is fixedly connected to the adjusting winch 10. The lifting platform 2 is provided with a 90-degree symmetrical through groove at the position of the cable through hole 22, so that the adjusting rotating disk 9 will not get stuck when rotating and adjusting. The fourth guide wheel 21 and the first guide wheel 11 support and guide the stretching lifting cable 15, so that the stretching lifting cable 15 can run smoothly. The stretching lifting cable 15 can be wound up by adjusting the winch 10, and when the guide support shaft 43 moves to the side of the guide arc groove 18 close to the fourth guide wheel 21, the lifting arm 3 will flip upward to further stretch the hoisted object. When the winch 10 is adjusted to rotate in the opposite direction, the windproof tube body 40 is reset under the action of gravity.

[0031] The adjusting winch 10 turntable position is fixedly connected with a tensioning lifting cable 15, and the tensioning lifting cable 15 is away from the adjusting winch 10. The end of the tensioning lifting cable 15 passes under the first guide wheel 11, passes through the cable through hole 22 and passes above the fourth guide wheel 21. The end of the tensioning lifting cable 15 away from the adjusting winch 10 is rotatably connected to the guide support shaft 43 through a rotating ring.

[0032] The upper surface of the lifting platform 2 is fixedly connected to a steel cable winding wheel 6 in the middle position away from the lifting boom 3. The upper surface of the lifting platform 2 is fixedly connected to a second guide wheel 16 on the side away from the steel cable winding wheel 6. The inner top wall of the lifting boom 3 is fixedly connected to a third guide wheel 17 on the side away from the steel cable winding wheel 6 and directly above the windproof tube structure 4. The upper surface of the lifting platform 2 is fixedly connected to a reduction motor 7 near the steel cable winding wheel 6. The output end of the reduction motor 7 is fixedly connected to the rotating shaft of the steel cable winding wheel 6. The steel cable winding wheel 6 is reversed under the power of the reduction motor 7, so that the lifting and stretching steel cable 5 can be wound or released. The second guide wheel 16 and the third guide wheel 17 can support and guide the lifting and stretching steel cable 5, so that the winding or releasing of the lifting and stretching steel cable 5 is smoother and will not produce sliding friction, thereby effectively protecting the lifting and stretching steel cable 5.

[0033] The cable reel 6 is fixedly connected to a lifting and stretching cable 5, and one end of the lifting and stretching cable 5 is away from the cable reel 6 and passes through the lower position of the second guide wheel 16, and then passes through the upper position of the third guide wheel 17, and then passes through the windproof tube body 40 and is fixedly connected to a hook. The hook at the position of the lifting and stretching cable 5 can fix the lifted object and lift or lower the lifted object.

[0034] Two symmetrically arranged guide support plates 14 are fixedly connected to the bottom inner side of the lifting arm 3. A windproof tube structure 4 is provided on the side below the lifting arm 3 away from the lifting platform 2 to prevent wind swinging. The guide support plate 14 can support and install the windproof tube structure 4. The windproof tube structure 4 can effectively prevent the hoisted object from colliding with the fan guard 1 under the action of wind when it rises to be parallel to the fan guard 1, making the hoisted object safer during the lifting process.

[0035] The two guide support plates 14 are both provided with guide arc grooves 18 on the inner sides, and the two ends of the guide support shaft 43 are slidably connected to the inner walls of the guide arc grooves 18 at the corresponding positions. The guide arc grooves 18 can make the guide support shaft 43 slide when it is pulled, so that the wind shield body 40 slides and rubs with the corresponding horizontal positioning reinforcement ribs 12, and the wind shield body 40 is pulled into the lifting arm 3, so that the hoisted objects are further pulled up, and when the wind shield body 40 is pulled back into the lifting arm 3, the lifting and stretching steel cable 5 will be folded at the lifting arm 3 position, and at this time the cable reel 6 continues to reel in the lifting and stretching steel cable 5, effectively improving the lifting speed of the hoisted objects.

[0036] The windproof tube structure 4 includes a windproof tube main body 40. Notches are provided on the top side of the windproof tube main body 40 away from the lifting platform 2 and on the bottom side close to the lifting platform 2, and a support guide wheel 41 is fixedly installed at the position of the notch. Two symmetrically arranged rotating guard plates 42 are rotatably connected to the upper position of the outer wall of the windproof tube main body 40. The rotating guard plates 42 are rotatably connected to the guide support shaft 43. The windproof tube main body 40 can pass through the lifting and stretching steel cable 5, and the lifting and stretching steel cable 5 in the windproof tube main body 40 will not shake widely. When the windproof tube main body 40 is retracted, the lifting and stretching steel cable 5 will not rub against the opening position of the windproof tube main body 40, thereby effectively protecting the lifting and stretching steel cable 5. The rotating guard plate 42 ensures that the windproof tube main body 40 is always installed at the guide support plate 14 position.

[0037] The surface of the adjusting rotating disk 9 is fixedly connected with a rotating base 23, and the lifting arm 3 is rotatably connected to the rotating base 23. The bottom position of the lifting arm 3 is fixedly connected with a number of evenly distributed arm reinforcement ribs 13, and the outer wall of the arm reinforcement rib 13 is wrapped with a graphite coating. The rotating base 23 allows the lifting arm 3 to rotate, so that the hoisted object is pulled to a position above the lifting platform 2, effectively reducing the labor intensity of the lifting work. The arm reinforcement rib 13 makes the lifting arm 3 stronger and more adaptable to the weight of the hoisted object. The graphite coating lubricates smoothly when the windproof tube main body 40 rubs against it, and the graphite coating is more wear-resistant.

[0038] The working principle of this embodiment is as follows: the lifting platform 2, reduction motor 7, lifting arm 3 and adjustment winch 10 are separately carried into the assembled fan guard 1, assembled and fixed with bolts, and two rows of horizontal positioning reinforcement ribs 12 are clamped on the outside of the fan guard 1. The support arm 8 is rotated and fixed, and the clamping groove 19 is clamped on the top side wall of the fan outer cover 1 to complete the assembly of the entire lifting system; When the lifting object is close to the windproof tube 4, the hoisting winch 10 is started to adjust the winch 10 so that the stretching lifting cable 15 is reeled in. The stretching lifting cable 15 pulls the guide support shaft 43, causing the guide support shaft 43 to slide in the guide arc groove 18, and the windproof tube body 40 slides at the position of the arm reinforcement rib 13, causing the windproof tube body 40 to flip and fold, and part of the lifting stretching cable 5 is folded into the lifting boom 3. At this time, the lifting stretching cable 5 continues to be reeled in, improving the pulling efficiency, and the lifting object is pulled to the lifting groove 20 position. At this time, the guide support shaft 43 is pulled to the end of the guide arc groove 18, and the lifting boom 3 is forced to flip and continue to lift the lifting object to the position above the lifting platform 2, and the goods can be removed. After removing the cargo, the cable reel 6 and the regulating winch 10 rotate in opposite directions, so that the lifting and stretching cable 5 and the stretching and lifting cable 15 are released. Under the action of gravity, the wind shield body 40 remains in a vertical state, which can effectively prevent the subsequent lifting objects from shaking at the position of the fan guard 1, and the hook slides down and resets under the action of gravity.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A tilting hoisting system for a wind turbine tower crane, comprising a wind turbine shroud (1) fixedly mounted on a tower, characterized in that: The fan guard (1) is provided with a lifting platform (2) for carrying and installing a lifting system. The center positions of the upper and lower surfaces of the lifting platform (2) are rotatably connected to an adjusting rotary disk (9) via the same shaft. A lifting arm (3) is installed at the position of the adjusting rotary disk (9). The inner bottom of the lifting arm (3) is fixedly connected to two symmetrically arranged guide support plates (14), and a windproof tube structure (4) is provided below the lifting arm (3) on the side away from the lifting platform (2) to prevent the lifting arm (3) from swinging due to wind.

2. The overturning hoisting system for a wind turbine tower crane according to claim 1, characterized in that: The windproof tube structure (4) includes a windproof tube body (40), and the windproof tube body (40) is provided with a notch on the top side away from the lifting platform (2) and the bottom side close to the lifting platform (2), and a support guide wheel (41) is fixedly installed at the notch position, and two symmetrically arranged rotating guard plates (42) are rotatably connected at the upper position of the outer wall of the windproof tube body (40), and the rotating guard plate (42) is rotatably connected to a guide support shaft (43) passing through the position of the rotating guard plate (42).

3. The overturning hoisting system for a wind turbine tower crane according to claim 2, characterized in that: A guide arc groove (18) is provided at the inner side of each of the two guide support plates (14), and both ends of the guide support shaft (43) are slidably connected to the inner walls of the guide arc groove (18) at corresponding positions.

4. The overturning hoisting system for a wind turbine tower crane according to claim 2, characterized in that: A steel cable reel (6) is fixedly connected to the middle position of the upper surface of the lifting platform (2) away from the lifting boom (3), a second guide wheel (16) is fixedly connected to the upper surface of the lifting platform (2) away from the steel cable reel (6), a third guide wheel (17) is fixedly connected to the inner top wall of the lifting boom (3) away from the steel cable reel (6) and located directly above the windproof tube structure (4), a reduction motor (7) is fixedly connected to the upper surface of the lifting platform (2) near the steel cable reel (6), and an output end of the reduction motor (7) is fixedly connected to the rotating shaft of the steel cable reel (6).

5. The overturning hoisting system for a wind turbine tower crane according to claim 4, characterized in that: The cable reel (6) is fixedly connected to a lifting and stretching cable (5) wound around it. One end of the lifting and stretching cable (5) away from the cable reel (6) passes through the lower position of the second guide wheel (16), then passes through the upper position of the third guide wheel (17), and then passes through the windproof tube body (40) and is fixedly connected to a hook.

6. The overturning hoisting system for a wind turbine tower crane according to claim 1, characterized in that: The surface of the regulating rotating disk (9) is fixedly connected to a rotating base (23), the lifting arm (3) is rotatably connected to the rotating base (23), and the bottom position of the lifting arm (3) is fixedly connected to a plurality of evenly distributed arm reinforcement ribs (13), and the outer wall of the arm reinforcement ribs (13) is wrapped with a graphite coating.

7. The overturning hoisting system for a wind turbine tower crane according to claim 2, characterized in that: A steel cable through hole (22) is formed on the upper surface of the adjusting rotating disk (9) near the steel cable reel (6). A fourth guide wheel (21) is fixedly connected to the upper surface of the adjusting rotating disk (9) at the position of the steel cable through hole (22). A first guide wheel (11) is fixedly connected to the lower surface of the adjusting rotating disk (9) at the position of the steel cable through hole (22). An adjusting winch (10) is fixedly connected to the middle portion of the lower surface of the adjusting rotating disk (9).

8. The turning and hoisting system for a wind turbine tower crane according to claim 7, characterized in that: The adjusting winch (10) is fixedly connected to a tensioning hoisting cable (15) wound around the turntable. The end of the tensioning hoisting cable (15) away from the adjusting winch (10) passes under the first guide wheel (11), passes through the cable through hole (22) and passes above the fourth guide wheel (21). The end of the tensioning hoisting cable (15) away from the adjusting winch (10) is rotatably connected to the guide support shaft (43) through a rotating ring.

9. The overturning hoisting system for a wind turbine tower crane according to claim 1, characterized in that: The lifting platform (2) is rotatably connected to two symmetrically arranged fixed support arms (8) at both ends, and clamping grooves (19) are provided at both ends of the two fixed support arms (8). The thickness of the clamping grooves (19) is greater than the thickness of the side wall of the fan guard (1). The upper surface of the lifting platform (2) is provided with a lifting groove (20) below the lifting arm (3), and the lower surface of the lifting platform (2) is fixedly connected to a plurality of evenly distributed horizontal positioning reinforcement ribs (12).

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