Fan tower tube elevator

Abstract

The utility model relates to a fan tower tube elevator. Comprising a lifting car device, and a lower contour limiting device, an upper contour limiting device and a ladder stand guide wheel assembly are installed on the lifting car device. The lower contour limiting device comprises a lift car base mechanism, a limiting lower base and a lower telescopic mechanism, a bottom plate escape door is installed on the lift car base mechanism, and a bottom escape door is installed on the limiting lower base; the upper contour limiting device comprises an upper contour base, and a top escape plate and an upper telescopic mechanism are installed on the upper contour base. The lift car device comprises a lift car top seat, a lift car back plate, a side coaming, a double-leaf sliding door assembly and two escape door coamings are fixedly connected to the lift car top seat, and an escape door plate is arranged between the two escape door coamings. The device further comprises a lifting driving assembly and a rope guide wheel assembly. The double-leaf sliding door assembly comprises a fixed door plate. The multi-direction escape function is achieved, and workers can escape from the top, the bottom and the side faces of the lifting car conveniently; the opening degree of the car doorway is large, the car doorway is not prone to being clamped by materials in the car, and operation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of wind power equipment technology, and in particular relates to a wind turbine tower hoist. Background Technology

[0002] Wind energy, as a clean and renewable energy source, is receiving increasing attention from countries around the world, and its potential is enormous. Wind power generation, as one of today's emerging energy industries, has seen rapid development due to its environmental and energy-saving advantages. Wind power generation refers to converting the kinetic energy of wind into electrical energy. These wind turbine generators can generally be divided into three parts: the wind rotor (including the tail rudder), the generator, and the tower.

[0003] The wind turbine tower is the framework supporting the rotor, tail rudder, and generator. It is generally built quite high to obtain greater and more uniform wind power while maintaining sufficient strength. A tower hoist (also known as a climbing device) is a specialized hoist installed inside the wind turbine tower to transport personnel, tools, and materials to the upper platform or nacelle, and can be stopped at any position inside the tower for maintenance and repair work. In traditional wind turbine tower installations, a platform is installed at regular intervals, with a car opening on the platform for the hoist to pass through. A guide steel cable passes through this opening, and the hoist moves up and down along the guide steel cable. By optimizing the platform structure, the car opening can be aligned vertically, allowing the guide steel cable to be vertical and the hoist to move vertically.

[0004] In some simple wind turbine towers, or to control the cost of wind power facilities, existing technologies often omit the platform inside the tower. Current tower hoists typically place escape windows at the bottom of the car, allowing workers to escape to the nearest platform in case of danger. However, the aforementioned tower lacks a platform, preventing escape through the bottom escape window. Furthermore, existing hoist car doors are usually single-leaf sliding doors. After opening, the movable door moves behind the fixed door, limiting the doorway to about half the width of the hoist car. This small doorway makes it inconvenient for personnel to enter and exit the hoist car, and for materials and tools to be brought in or out. Excessive or large materials inside the car can also jam the movable door, hindering its opening and closing. Therefore, there is an urgent need to design a wind turbine tower hoist to solve these problems. Utility Model Content

[0005] This utility model provides a wind turbine tower hoist with a reasonable structural design to solve the technical problems existing in the prior art. This utility model is equipped with multi-directional escape functions, facilitating workers to escape from the top, bottom, and sides of the hoisting car and climb onto the tower ladder; moreover, the car door has a large opening, making it less likely to be blocked by materials inside the car, and operation is convenient.

[0006] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is as follows: A wind turbine tower hoist includes a lifting car device, a lower contour limiting device installed at the bottom of the lifting car device, and an upper contour limiting device installed at the top of the lifting car device; a plurality of ladder guide wheel assemblies are installed in pairs on the back of the lifting car device and are rotatably connected to the ladders inside the tower; the lower contour limiting device includes a car base mechanism fixedly connected to the bottom of the lifting car device, a limiting lower base is provided below the car base mechanism, a lower telescopic mechanism is provided between the car bottom plate and the limiting lower base, an escape opening is provided on the car base mechanism and a bottom plate escape door is installed, and an escape opening is provided on the limiting lower base and a bottom escape door corresponding to the bottom plate escape door is installed; the upper contour limiting device includes an upper contour base installed on the top of the lifting car device, an escape window is provided on the upper contour base and a top escape door is installed. The system includes a top escape platform with an upper telescopic mechanism, a spring pull plate on the upper telescopic mechanism, and a return spring between the spring pull plate and the upper contour base. The lifting car device includes a car top seat, with a car back panel, side panels, a double-leaf sliding door assembly, and two escape door panels fixedly connected to its four sides. An escape door panel is positioned between the two escape door panels and is detachably connected to the two escape door panels via locking components. The escape door panel and each ladder guide wheel assembly are located on the same side. The system also includes a lifting drive assembly and a rope guide wheel assembly installed on the car top seat. The double-leaf sliding door assembly includes a fixed door panel fixed between the car top seat and the car base mechanism, an upper door rail fixed to the car top seat, and a lower door rail fixed to the car base mechanism. Both the lower and upper door rails are located outside the fixed door panel. A first and second sliding door panel are movably connected between the lower and upper door rails.

[0007] The advantages and positive effects of this utility model are as follows: This utility model provides a wind turbine tower hoist. The escape door facilitates escape for workers from the side of the hoisting car, the bottom escape door and the bottom escape door facilitate escape from the bottom of the hoisting car, and the top escape door facilitates escape from the top of the hoisting car. The double-leaf sliding door assembly enables the opening of the double-leaf sliding doors at the entrance and exit of the hoisting car, increasing the opening width of the entrance and exit, thus allowing workers, materials, and tools to smoothly enter and exit the hoisting car. Since the lower and upper sliding rails are located outside the fixed door panels, the first and second sliding door panels can be pushed and pulled outside the hoisting car, preventing materials inside the hoisting car from jamming the sliding door panels and affecting the opening and closing of the double-leaf sliding door assembly.

[0008] Preferably: a hanging wheel mechanism is installed at the top of the first sliding door panel and the top of the second sliding door panel, which passes through the door upper slide rail and rolls in contact with it; a slide rail guide sleeve is installed at the bottom of the first sliding door panel and the bottom of the second sliding door panel by bolts, which passes through the door lower slide rail and rolls in contact with it; a door panel pulley is installed at the lower part of the first sliding door panel, which rolls in contact with the second sliding door panel; and a sliding door lock is installed in the middle of the second sliding door panel.

[0009] Preferably, the lifting drive assembly includes a hoist and a safety lock mounted on the top seat of the car.

[0010] Preferably, the rope guide wheel assembly includes a guide wheel bracket fixedly connected to the car top seat, two horizontally parallel shafts fixedly connected to the upper part of the guide wheel bracket, a second guide wheel corresponding to the safety lock and a first guide wheel corresponding to the hoist rotatably connected to the two shafts respectively, and an upper isolation sleeve for limiting the corresponding guide wheel on each shaft; a horizontally arranged optical shaft fixedly connected to the lower part of the guide wheel bracket, a first guide rope wheel corresponding to the first guide wheel and a second guide rope wheel corresponding to the second guide wheel rotatably connected to the optical shaft, and a lower isolation sleeve sleeved on the optical shaft for limiting the two guide rope wheels between the first guide rope wheel and the second guide rope wheel; it also includes an anti-jump tube installed on the guide wheel bracket, located outside the two guide rope wheels and arranged horizontally; and two rope threading ports corresponding to the second guide wheel and the first guide wheel respectively are opened on the top of the guide wheel bracket.

[0011] Preferably, the car base mechanism includes a base plate support, a car base plate fixedly connected to the top of the base plate support, and several bottom support legs fixedly connected to the base plate support. A slot is provided on the lower base for the several bottom support legs to pass through. An escape hatch is provided on the car base plate, and an escape door is provided at the escape hatch and pivotally connected to the car base plate. The mechanism also includes a limit switch installed on the base plate support.

[0012] Preferably, the lower telescopic mechanism includes three sets of pull rope units installed between the car base mechanism and the lower limit base. Each pull rope unit includes two limit pull ropes arranged in a cross pattern. Both ends of each limit pull rope are connected to the car base mechanism and the lower limit base through a pressing joint and screws.

[0013] Preferably, the upper telescopic mechanism includes an inner frame structure and an outer frame structure, which are pivotally connected by a pin passing through their middle sections. The lower end of the outer frame structure is pivotally connected to the upper contour base by a pin, and the lower end of the inner frame structure is pivotally connected to the upper contour base by a pin that slides through a slot in the upper contour base. An upper limit trigger plate is also mounted on the outer frame structure. Attached Figure Description

[0014] Figure 1This is a three-dimensional structural schematic diagram of the present invention, from a frontal perspective;

[0015] Figure 2 This is a three-dimensional structural schematic diagram of the present invention, viewed from the rear.

[0016] Figure 3 This is a three-dimensional structural diagram of the lifting car device in this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the double-leaf sliding door assembly of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the lower contour limiting device in this utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the upper contour limiting device in this utility model;

[0020] Figure 7 This is a three-dimensional structural diagram of the rope guide wheel assembly in this utility model.

[0021] In the diagram: 1. Lower contour limiting device; 1-1. Limiting pull rope; 1-2. Lower limit trigger plate; 1-3. Limiting lower base; 1-4. Bottom support leg; 1-5. Car floor plate; 1-6. Floor plate support; 1-7. Floor plate escape door; 1-8. Bottom escape door; 2. Ladder guide wheel assembly; 2-1. Ladder guide wheel; 2-2. Guide wheel seat; 3. Lifting car device; 3-1. Car back panel; 3-2. Anti- Grinding plate; 3-3, Side panel; 3-4, Control box; 3-5, Rope guide wheel assembly; 3-5-1, First rope guide wheel; 3-5-2, Lower isolation sleeve; 3-5-3, Second rope guide wheel; 3-5-4, Guide wheel cover; 3-5-5, Upper isolation sleeve; 3-5-6, Second guide wheel; 3-5-7, Anti-jump tube; 3-5-8, First guide wheel; 3-5-9, Guide wheel bracket; 3-6, Escape door panel; 3- 7. Double-leaf sliding door assembly; 3-7-1. Fixed door panel; 3-7-2. Door lower rail; 3-7-3. Rail guide sleeve; 3-7-4. First sliding door panel; 3-7-5. Door panel roller; 3-7-6. Second sliding door panel; 3-7-7. Sliding door lock; 3-7-8. Hanging wheel mechanism; 3-7-9. Door upper rail; 3-8. Foot pedal; 3-9. Cable cover plate; 3-10. Escape door pull 3-11. Car top seat; 3-12. Upper side panel; 3-13. Safety lock; 3-14. Escape door enclosure; 3-15. Hoist; 3-16. Upper escape door; 4. Upper contour limit device; 4-1. Upper contour base; 4-2. Spring pull plate; 4-3. Reset spring; 4-4. Upper limit trigger plate; 4-5. Inner frame structure; 4-6. Outer frame structure; 4-7. Top escape plate. Detailed Implementation

[0022] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided in detail:

[0023] Please see Figure 1 The wind turbine tower hoist of this utility model includes a lifting car device 3, a lower contour limiting device 1 installed at the bottom of the lifting car device 3, an upper contour limiting device 4 installed at the top of the lifting car device 3, and a plurality of climbing guide wheel assemblies 2 arranged in pairs and rotatably connected to the climbing ladder inside the tower on the back of the lifting car device 3.

[0024] like Figure 5 As shown, the aforementioned lower contour limiting device 1 includes a car base mechanism fixedly connected to the bottom of the lifting car device 3, a limiting lower base 1-3 provided below the car base mechanism, a lower telescopic mechanism provided between the car floor plate 1-5 and the limiting lower base 1-3, an escape opening provided on the car base mechanism and a bottom plate escape door 1-7 installed, and an escape opening provided on the limiting lower base 1-3 and a bottom escape door 1-8 corresponding to the bottom plate escape door 1-7 installed.

[0025] The aforementioned car base mechanism includes a base plate support 1-6, with a car base plate 1-5 fixedly connected to the top of the base plate support 1-6. It also includes several bottom support legs 1-4 fixedly connected to the base plate support 1-6, and slots for the bottom support legs 1-4 to pass through on a lower limiting base 1-3. An escape hatch is provided on the car base plate 1-5, and an escape door 1-7 is located at the escape hatch and pivotally connected to the car base plate 1-5. It also includes a limit switch installed on the base plate support 1-6. Furthermore, the car base plate 1-5 has a U-shaped structure, and the limit switch cooperates with a lower limiting trigger plate 1-2 installed on the lower limiting base 1-3. Additionally, a reinforcing rib is installed on the base plate support 1-6 to support and limit the escape door 1-7.

[0026] Furthermore, the aforementioned ladder guide wheel assembly 2 includes a guide wheel seat 2-2, on which two sets of ladder guide wheels 2-1 are installed side by side. The ladder inside the tower passes between the two sets of ladder guide wheels 2-1 and rolls in contact with the ladder guide wheels 2-1.

[0027] Furthermore, the lower telescopic mechanism includes three sets of pull rope units installed between the car base mechanism and the lower limit base 1-3. The pull rope unit includes two limit pull ropes 1-1 arranged in a cross configuration. Both ends of each limit pull rope 1-1 are connected to the car base mechanism and the lower limit base 1-3 through a pressing joint and screws.

[0028] like Figure 6As shown, the above-mentioned upper contour limiting device 4 includes an upper contour base 4-1 installed on the top of the lifting car device 3, an escape window is provided on the upper contour base 4-1 and a top escape plate 4-7 is installed, an upper telescopic mechanism is installed on the top escape plate 4-7, a spring pull plate 4-2 is installed on the upper telescopic mechanism, and a reset spring 4-3 is installed between the spring pull plate 4-2 and the upper contour base 4-1.

[0029] The upper telescopic mechanism includes an inner frame structure 4-5 and an outer frame structure 4-6, which are pivotally connected by a pin passing through their middle sections. The lower end of the outer frame structure 4-6 is pivotally connected to the upper contour base 4-1 by a pin, and the lower end of the inner frame structure 4-5 is pivotally connected to the upper contour base 4-1 by a pin that slides through a slot in the upper contour base 4-1. An upper limit trigger plate 4-4 is also mounted on the outer frame structure 4-6. The upper limit trigger plate 4-4 cooperates with a limit switch mounted on the upper contour base 4-1.

[0030] like Figure 6 As shown, a limiting plate for erecting the top escape plate 4-7 is installed on the upper contour base 4-1. A hinged bolt is installed on the top escape plate 4-7. A through hole is provided on the limiting plate for the hinged bolt to pass through. An O-pin is inserted into the hinged bolt to lock the top escape plate 4-7.

[0031] like Figure 2 and Figure 3 As shown, the aforementioned lifting car device 3 includes a car top seat 3-11. A car back panel 3-1, side panels 3-3, a double-leaf sliding door assembly 3-7, and two escape door panels 3-14 are fixedly connected to the four sides of the car top seat 3-11. An escape door panel 3-6 is provided between the two escape door panels 3-14. The escape door panel 3-6 is detachably connected to the two escape door panels 3-14 via locking components. An escape door tie rod 3-10 is installed on the inner wall of the escape door panel 3-6. Furthermore, the escape door panel 3-6 is located on the same side as each ladder guide wheel assembly 2. It also includes a lifting drive assembly and a rope guide wheel assembly 3-5 installed on the car top seat 3-11. An upper side panel 3-12 is provided above the double-leaf sliding door assembly 3-7.

[0032] Furthermore, an upper escape door 3-16 is installed between the two escape door panels 3-14, located above the escape door panel 3-6. The upper escape door 3-16 is pivotally connected to one escape door panel 3-14 via a hinge and locked to the other escape door panel 3-14 via a locking mechanism, which is a locking knob. To facilitate the escape of staff from the top of the self-elevating car device 3, multiple foot pedals 3-8 are installed between the car back panel 3-1 and the side panel 3-3, as well as between 3-3 and 3-7. A cable cover 3-9 is installed on the inner wall of the side panel 3-3, and an anti-wear plate 3-2 is installed on the lower part of the outer wall of the side panel 3-3. In addition, a slot is opened in the middle of the side panel 3-3, and a control box 3-4 is installed in the slot. An installation slot for the rope guide wheel assembly 3-5 to pass through is opened in the upper part of the side panel 3-3.

[0033] The lifting drive assembly includes a hoist 3-15 and a safety lock 3-13 mounted on the car top seat 3-11. A rope guide assembly 3-5 is located below the lifting drive assembly. A safety wire rope passes through the safety lock 3-13, and a working wire rope passes through the hoist 3-15. The safety wire rope and the working wire rope pass through the safety lock 3-13 and the hoist 3-15 respectively, and are then discharged through the rope guide assembly 3-5.

[0034] See further Figure 7 The aforementioned rope guide wheel assembly 3-5 includes a guide wheel bracket 3-5-9 fixedly connected to the car top seat 3-11. Two horizontally parallel shafts are fixedly connected to the upper part of the guide wheel bracket 3-5-9. A second guide wheel 3-5-6 corresponding to the safety lock 3-13 and a first guide wheel 3-5-8 corresponding to the hoist 3-15 are rotatably connected to the two shafts, respectively. An upper isolation sleeve 3-5-5 is fitted onto each shaft to limit the movement of the corresponding guide wheel. A horizontally arranged optical shaft is fixedly connected to the lower part of the guide wheel bracket 3-5-9. A first guide wheel 3-5-8 corresponding to the first guide wheel 3-5-6 is rotatably connected to the optical shaft. The guide wheel 3-5-8 includes a first guide wheel 3-5-1 corresponding to the guide wheel 3-5-8 and a second guide wheel 3-5-3 corresponding to the second guide wheel 3-5-6. A lower isolation sleeve 3-5-2, fitted on the optical shaft and limiting the movement of the two guide wheels, is provided between the first guide wheel 3-5-1 and the second guide wheel 3-5-3. The assembly also includes an anti-slip tube 3-5-7 mounted on the guide wheel bracket 3-5-9, located outside the two guide wheels and arranged laterally. Two rope-passing openings, corresponding to the second guide wheel 3-5-6 and the first guide wheel 3-5-8 respectively, are provided on the top of the guide wheel bracket 3-5-9. The rope guide wheel assembly 3-5 also includes a guide wheel cover 3-5-4 mounted on the car top seat 3-11, covering the outside of the guide wheel bracket 3-5-9.

[0035] See further Figure 4The aforementioned double-leaf sliding door assembly 3-7 includes a fixed door panel 3-7-1 fixedly connected between the car top seat 3-11 and the car base mechanism, and also includes an upper door slide rail 3-7-9 fixedly connected to the car top seat 3-11 and a lower door slide rail 3-7-2 fixedly connected to the car base mechanism. The lower door slide rail 3-7-2 and the upper door slide rail 3-7-9 are both located outside the fixed door panel 3-7-1. A first sliding door panel 3-7-4 and a second sliding door panel 3-7-6 are movably connected between the lower door slide rail 3-7-2 and the upper door slide rail 3-7-9.

[0036] A hanging wheel mechanism 3-7-8 is installed at the top of the first sliding door panel 3-7-4 and the top of the second sliding door panel 3-7-6, which passes through the door upper slide rail 3-7-9 and rolls in contact with it. A slide rail guide sleeve 3-7-3 is installed at the bottom of the first sliding door panel 3-7-4 and the bottom of the second sliding door panel 3-7-6 by bolts, which passes through the door lower slide rail 3-7-2 and rolls in contact with it. A door panel pulley 3-7-5 is installed at the lower part of the first sliding door panel 3-7-4 and rolls in contact with the second sliding door panel 3-7-6. A sliding door lock 3-7-7 is installed in the middle of the second sliding door panel 3-7-6.

[0037] In this embodiment, both the first sliding door panel 3-7-4 and the second sliding door panel 3-7-6 have a U-shaped structure. The opening of the first sliding door panel 3-7-4 faces outward, and the opening of the second sliding door panel 3-7-6 faces inward. This arrangement enables the first sliding door panel 3-7-4 and the second sliding door panel 3-7-6 to mutually limit each other. The hanging wheel mechanism 3-7-8 includes a bent plate fixed to the top of the corresponding sliding door panel. Several pairs of rollers are installed on the bent plate. The two rollers in each pair are distributed on both sides of the bent plate. Each roller is in rolling contact with the bottom of the inner wall of the upper sliding rail 3-7-9. Both the upper sliding rail 3-7-9 and the lower sliding rail 3-7-2 are sliding rails with a C-shaped cross section.

[0038] Limiting baffles are installed on the inner side of the fixed door panel 3-7-1 and the outer side of the first sliding door panel 3-7-4 to limit the sliding stroke of the first sliding door panel 3-7-4.

[0039] To facilitate ventilation and heat dissipation, several ventilation holes are provided on all four sides of the lowering car device 3.

[0040] Working principle:

[0041] In actual operation, the two ladder guide wheels 2-1 in each ladder guide wheel assembly 2 clamp onto the edge of the ladder inside the tower and roll into contact with the ladder; the safety lock 3-13 is equipped with a safety wire rope, and the hoist 3-15 is equipped with a working wire rope. After the safety wire rope and the working wire rope pass through the safety lock 3-13 and the hoist 3-15 respectively, they are led out through the rope guide wheel assembly 3-5. When the hoist 3-15 is started, it can drive the lifting car device 3 to move up and down along the ladder inside the tower.

[0042] The escape doors 3-6 facilitate the side escape of the self-elevating car device 3 for staff. The bottom escape doors 1-7 and 1-8 facilitate the bottom escape of the self-elevating car device 3 for staff. The top escape door 4-7 facilitates the top escape of the self-elevating car device 3 for staff.

[0043] By setting up the double-leaf sliding door assembly 3-7, the double-leaf sliding door opening method of the entrance and exit of the lifting car device 3 is realized, which increases the opening degree of the entrance and exit of the lifting car device 3, and facilitates the smooth entry and exit of personnel, materials and tools into and out of the lifting car device 3. Since the lower sliding rail 3-7-2 and the upper sliding rail 3-7-9 are located outside the fixed door panel 3-7-1, the first sliding door panel 3-7-4 and the second sliding door panel 3-7-6 are pushed and pulled outside the lifting car device 3, which avoids the materials inside the lifting car device 3 from getting stuck in the sliding door panel and affecting the closing of the double-leaf sliding door assembly 3-7.

Claims

1. A wind turbine tower hoist, characterized in that: The system includes a lifting car device (3), a lower contour limiting device (1) installed at the bottom of the lifting car device (3), and an upper contour limiting device (4) installed at the top of the lifting car device (3); a number of ladder guide wheel assemblies (2) are installed in pairs on the back of the lifting car device (3) and are tactilely connected to the ladder inside the tower; the lower contour limiting device (1) includes a car base mechanism fixed to the bottom of the lifting car device (3), a limiting lower base (1-3) is provided below the car base mechanism, a lower telescopic mechanism is provided between the car floor plate (1-5) and the limiting lower base (1-3), and an opening is provided on the car base mechanism. An escape hatch is provided and a bottom escape door (1-7) is installed. An escape hatch is opened on the lower limiting base (1-3) and a bottom escape door (1-8) corresponding to the bottom escape door (1-7) is installed. The upper contour limiting device (4) includes an upper contour base (4-1) installed on the top of the lifting car device (3). An escape window is opened on the upper contour base (4-1) and a top escape plate (4-7) is installed. An upper telescopic mechanism is installed on the top escape plate (4-7). A spring pull plate (4-2) is installed on the upper telescopic mechanism. A reset spring is installed between the spring pull plate (4-2) and the upper contour base (4-1). (4-3); The lifting car device (3) includes a car top seat (3-11), on which a car back panel (3-1), side panels (3-3), a double-leaf sliding door assembly (3-7), and two escape door panels (3-14) are fixedly connected to the four sides of the car top seat (3-11). An escape door panel (3-6) is provided between the two escape door panels (3-14). The escape door panel (3-6) is detachably connected to the two escape door panels (3-14) by locking components. The escape door panel (3-6) is located on the same side as each ladder guide wheel assembly (2); it also includes a lifting drive assembly and rope guide wheels installed on the car top seat (3-11). Component (3-5); The double-leaf sliding door assembly (3-7) includes a fixed door panel (3-7-1) fixedly connected between the car top seat (3-11) and the car base mechanism, and also includes an upper door slide rail (3-7-9) fixedly connected to the car top seat (3-11) and a lower door slide rail (3-7-2) fixedly connected to the car base mechanism. The lower door slide rail (3-7-2) and the upper door slide rail (3-7-9) are both located outside the fixed door panel (3-7-1). A first sliding door panel (3-7-4) and a second sliding door panel (3-7-6) are movably connected between the lower door slide rail (3-7-2) and the upper door slide rail (3-7-9).

2. The wind turbine tower hoist as described in claim 1, characterized in that: in The top of the first sliding door panel (3-7-4) and the top of the second sliding door panel (3-7-6) are both equipped with a hanging wheel mechanism (3-7-8) that passes through and rolls in contact with the upper sliding rail (3-7-9). The bottom of the first sliding door panel (3-7-4) and the bottom of the second sliding door panel (3-7-6) are both equipped with a sliding rail guide sleeve (3-7-3) that passes through and rolls in contact with the lower sliding rail (3-7-2) by bolts. The lower part of the first sliding door panel (3-7-4) is equipped with a door panel pulley (3-7-5) that rolls in contact with the second sliding door panel (3-7-6). The middle part of the second sliding door panel (3-7-6) is equipped with a sliding door lock (3-7-7).

3. The wind turbine tower hoist as described in claim 1, characterized in that: The lifting drive assembly includes a hoist (3-15) and a safety lock (3-13) mounted on the car top seat (3-11).

4. The wind turbine tower hoist as described in claim 3, characterized in that: The rope guide wheel assembly (3-5) includes a guide wheel bracket (3-5-9) fixedly connected to the car top seat (3-11). Two horizontally parallel shafts are fixedly connected to the upper part of the guide wheel bracket (3-5-9). A second guide wheel (3-5-6) corresponding to the safety lock (3-13) and a first guide wheel (3-5-8) corresponding to the hoist (3-15) are rotatably connected to the two shafts respectively. An upper isolation sleeve (3-5-5) is fitted onto each shaft to limit the movement of the corresponding guide wheel. A horizontally arranged optical shaft is fixedly connected to the lower part of the guide wheel bracket (3-5-9). A first guide wheel (3-5-8) rotatably connected to the optical shaft is connected to the first guide wheel (3-5-6). The first guide wheel (3-5-1) corresponding to the second guide wheel (3-5-6) and the second guide wheel (3-5-3) are provided between the first guide wheel (3-5-1) and the second guide wheel (3-5-3), and a lower isolation sleeve (3-5-2) is provided between the first guide wheel (3-5-1) and the second guide wheel (3-5-3) and is sleeved on the optical shaft to limit the two guide wheels; it also includes an anti-slip tube (3-5-7) installed on the guide wheel bracket (3-5-9) and located outside the two guide wheels and arranged laterally; two rope-threading holes are opened on the top of the guide wheel bracket (3-5-9) respectively corresponding to the second guide wheel (3-5-6) and the first guide wheel (3-5-8).

5. The wind turbine tower hoist as described in claim 1, characterized in that: The car base mechanism includes a base plate support (1-6), a car base plate (1-5) fixedly connected to the top of the base plate support (1-6), and several bottom support legs (1-4) fixedly connected to the base plate support (1-6). A slot is provided on the lower base (1-3) for the several bottom support legs (1-4) to pass through. An escape hatch is provided on the car base plate (1-5), and a base plate escape door (1-7) is provided at the escape hatch and pivotally connected to the car base plate (1-5). It also includes a limit switch installed on the base plate support (1-6).

6. The wind turbine tower hoist as described in claim 1, characterized in that: The lower telescopic mechanism includes three sets of pull rope units installed between the car base mechanism and the lower limit base (1-3). The pull rope unit includes two limit pull ropes (1-1) arranged in a cross manner. Both ends of each limit pull rope (1-1) are connected to the car base mechanism and the lower limit base (1-3) through a pressing joint and screws.

7. The wind turbine tower hoist as described in claim 1, characterized in that: The upper telescopic mechanism includes an inner frame structure (4-5) and an outer frame structure (4-6). The inner frame structure (4-5) and the outer frame structure (4-6) are pivotally connected by a pin passing through the middle of the two. The lower end of the outer frame structure (4-6) is pivotally connected to the upper contour base (4-1) by a pin. The lower end of the inner frame structure (4-5) is pivotally connected to the upper contour base (4-1) by a pin that slides through a strip hole opened in the upper contour base (4-1). An upper limit trigger plate (4-4) is also installed on the outer frame structure (4-6).

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