Self-lifting telescopic platform

Abstract

The present invention relates to a self-lifting telescopic platform. It includes a bottom platform structure arranged inside a wind turbine tower, with a window provided on the bottom platform structure; a plurality of first platform structures and a plurality of second platform structures are arranged above the bottom platform structure at intervals along the circumference and can synchronously contract inwardly / expand outwardly, and the adjacent first platform structures and second platform structures are in embedded movable connection; a first drive device and a first ladder are hingedly connected between each first platform structure and the bottom platform structure, and a second drive device and a second ladder are hingedly connected between each second platform structure and the bottom platform structure; and it also includes a lifting drive device installed on the inner wall of the wind turbine tower for driving each platform structure to rise and fall synchronously. The present invention can adjust the height and outer diameter of the telescopic platform according to installation needs, without the need to produce work platforms of different sizes, has strong adaptability, and low production cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power facilities, and in particular relates to a self-lifting telescopic platform. Background Art

[0002] With technological advancements and the growing demand for clean energy, wind power generation technology has seen significant development. Wind power generation refers to the use of wind turbines to convert wind energy into electricity. Existing wind turbines typically consist of a wind turbine tower, wind blades, and a generator set, with an elevator typically installed within the wind turbine tower. A tower elevator is a specialized elevator installed inside the wind turbine tower to transport personnel, tools, and materials to the upper platform or nacelle. The elevator can be docked at any location within the tower for inspection and maintenance.

[0003] As the power of a single wind turbine increases, the height of the tower increases accordingly, usually tens of meters or even hundreds of meters. It is impractical to cast a wind turbine tower of such a length in one go. At present, wind turbine towers include concrete towers, steel towers, steel-concrete mixed towers, and other forms. Concrete towers in the prior art are generally prefabricated in sections and pieces. Sections are divided into several concrete sections along the height direction of the concrete tower, and pieces are divided into several concrete pieces along the circumference of the section. After the concrete pieces are transported to the site, they are assembled on a dedicated assembly platform to form concrete sections. After the concrete sections are assembled, the entire section is hoisted. After hoisting to the preset position, the construction personnel need to perform construction operations on the connecting surfaces of the two concrete sections to achieve the connection between the two, and then repeatedly hoist the concrete sections until the installation of the entire concrete tower is completed.

[0004] Due to the large diameter of the wind turbine tower, an assembly platform must be built inside the tower during assembly. Conventional assembly platforms currently on the market have relatively simple structures and suffer from the following drawbacks: They cannot be effectively moved to the appropriate position within the tower during operation, meaning they cannot be adjusted in height. Furthermore, the wind turbine tower adopts a variable diameter structure, and existing assembly platforms cannot be adjusted appropriately based on the specific inner diameter of the tower. This means that each assembly platform has a different size and needs to be manufactured separately, which results in long processing times and high costs. Summary of the Invention

[0005] In order to solve the technical problems existing in the known technology, the present invention provides a self-lifting telescopic platform with reasonable structural design, strong adaptability and adjustable height.

[0006] The technical solution adopted by the present invention to solve the technical problems existing in the known technology is: a self-lifting telescopic platform includes a bottom platform structure arranged inside the wind turbine tower, and a window is opened on the bottom platform structure; above the bottom platform structure, multiple groups of first platform structures and multiple groups of second platform structures are arranged at intervals along the circumference and can synchronously shrink inward / expand outward, and the adjacent first platform structures and second platform structures are embedded and movablely connected; a first drive device and a first ladder are hingedly connected between each first platform structure and the bottom platform structure, and a second drive device and a second ladder are hingedly connected between each second platform structure and the bottom platform structure; and it also includes a lifting drive device installed on the inner wall of the wind turbine tower for driving each platform structure to rise and fall synchronously.

[0007] The advantages and positive effects of the present invention are as follows: the present invention provides a self-lifting telescopic platform, which can be installed on the inner wall of each tower installation section in sequence by setting a lifting drive device during the installation of the wind turbine tower, so that the staff can perform construction operations on the connecting surfaces of the two tower installation sections, and the height of the telescopic platform can be adjusted in real time according to the installation needs, and the operation process is simple and convenient; by setting multiple groups of first platform structures and multiple groups of second platform structures with embedded movable connections, they work together to form a ring-shaped platform as the main load-bearing structure of the working platform in the tower. Compared with the load-bearing structure of the existing conventional working platform, the telescopic platform of the present invention uses less material and has reasonable force. The bottom platform structure, the first drive device and the second drive device can drive multiple groups of first platform structures and multiple groups of second platform structures to shrink inward / expand outward synchronously, thereby adjusting the outer diameter of the annular platform jointly formed by the multiple groups of platform structures, so that the telescopic platform can adapt to the inner diameter of the installation section of the wind turbine tower; through the above-mentioned arrangement, each telescopic platform can be designed to have the same structure and size, and the telescopic platform can be designed as a standard part. There is no need to produce internal working platforms of different sizes according to the inner diameter of the wind turbine tower, which reduces material consumption and reduces production costs; in addition, the present invention can also avoid deformation of the telescopic platform due to vibration of the wind turbine tower, thereby improving the stability and safety of the telescopic platform.

[0008] Preferably: the lifting drive device includes a lifting unit installed between the inner wall of the wind turbine tower and each drive device, and multiple groups of lifting units are distributed at equal angles in the circumferential direction; the upper part of each lifting unit is detachably connected to the inner wall of the wind turbine tower.

[0009] Preferably: the lifting unit includes a hanging point mounting part and a hoist fixed to the inner wall of the wind turbine tower in an upper and lower distribution, a fixed pulley and a rotary connector are installed on the hanging point mounting part, and also includes a lifting ear plate and a guide pulley installed on the corresponding drive device, and also includes a lifting wire rope and a fixed wire rope, one end of the fixed wire rope is connected to the lifting ear plate, and the other end is connected to the rotary connector, one end of the lifting wire rope is connected to the lifting ear plate, and the other end is connected to the hoist after passing through the fixed pulley and the guide pulley in sequence.

[0010] Preferably: the first platform structure includes a first platform base with a trapezoidal bending structure, and the first platform base is in rolling contact with the second platform structure; two groups of first bent top rods arranged in parallel in the transverse direction are fixedly connected to the first platform base through a first mounting bar, and each first bent top rod is a trapezoidal bending structure adapted to the first platform base; a first guide wheel assembly is installed on the outer side surface of each first bent top rod and is in rolling contact with the second platform structure.

[0011] Preferably: the first guide wheel assembly includes a guide wheel mounting plate fixedly connected to the outer side surface of the first bent push rod, a first guide wheel rotatably connected to the guide wheel mounting plate and in rolling contact with the second platform structure, and also includes a top block installed on the outer end surface of the first guide wheel.

[0012] Preferably: the second platform structure includes a second platform base with a trapezoidal bending structure, and two groups of second bent top rods arranged in parallel in the transverse direction are fixedly connected to the second platform base through a second mounting bar, and each second bent top rod is a trapezoidal bending structure adapted to the second platform base; a U-shaped guide groove member with a trapezoidal bending structure is fixed to each second bent top rod, and the notches of the two groups of U-shaped guide groove members are arranged opposite to each other and in rolling contact with the first guide wheel assembly; and it also includes multiple groups of second guide wheel assemblies installed on the edge of the second platform base and in rolling contact with the first platform base.

[0013] Preferably, the second guide wheel assembly includes a guide wheel mounting seat fixedly connected to the second platform base, and a second guide wheel in rolling contact with the first platform base is rotatably connected to the guide wheel mounting seat.

[0014] Preferably: the first driving device includes a first articulated bracket arranged between the first platform base and the bottom platform structure, and the two ends of the first articulated bracket are respectively hinged to the first platform base and the bottom platform structure through pins; and also includes a first driving cylinder articulatedly connected between the first articulated bracket and the bottom platform structure.

[0015] Preferably: the second driving device includes a second articulated bracket arranged between the second platform base and the bottom platform structure, and the two ends of the second articulated bracket are respectively hinged to the second platform base and the bottom platform structure through pins; and also includes a second driving cylinder articulatedly connected between the second articulated bracket and the bottom platform structure.

[0016] Preferably, the bottom platform structure includes a base platform hinged to each drive device and each ladder, with multiple sets of guardrails installed on the edge of the base platform; and also includes an annular guardrail installed on the base platform around a window opened in the middle thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial cross-sectional three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the first driving device and the first platform structure in the present invention;

[0019] Figure 3 yes Figure 2 A magnified schematic diagram of the D region in FIG;

[0020] Figure 4 is a schematic diagram of the three-dimensional structure of the second driving device and the second platform structure in the present invention;

[0021] Figure 5 yes Figure 4 A magnified schematic diagram of the E region in FIG;

[0022] Figure 6 yes Figure 1 A magnified schematic diagram of area A;

[0023] Figure 7 yes Figure 1 A magnified schematic diagram of area B in FIG;

[0024] Figure 8 yes Figure 1 A magnified schematic diagram of the C region in FIG;

[0025] Figure 9 It is a schematic diagram of the three-dimensional structure of the bottom platform structure of the present invention;

[0026] Figure 10 It is a schematic structural diagram of the present invention in a contracted state;

[0027] Figure 11 It is a structural schematic diagram of the present invention in an expanded state.

[0028] In the figure: 1. Lifting drive device; 1-1. Hoist; 1-2. Lifting wire rope; 1-3. Guide pulley; 1-4. Fixed wire rope; 1-5. Lifting lug; 1-6. Fixed pulley; 1-7. Hanging point mounting; 1-8. Rotary connector; 2. Bottom platform structure; 2-1. Base platform; 2-2. Window; 2-3. Annular guardrail; 2-4. Guardrail; 3. First drive device; 3-1. First articulated bracket; 3-2. First drive cylinder; 4. First platform structure; 4-1. First platform base; 4-2. First bending push rod; 4-3. First guide wheel assembly; 4-3- 1. First guide wheel; 4-3-2. Top block; 4-3-3. Guide wheel mounting plate; 4-4. First mounting rail; 5. Second drive device; 5-1. Second articulated bracket; 5-2. Second drive cylinder; 6. Second platform structure; 6-1. Second platform base; 6-2. Second bent top rod; 6-3. U-shaped guide groove member; 6-4. Second guide wheel assembly; 6-4-1. Guide wheel mounting seat; 6-4-2. Second guide wheel; 6-5. Second mounting rail; 7. First ladder; 8. Second ladder; 9. Wind turbine tower; 9-1. First tower section; 9-2. Second tower section; 9-3. Third tower section. Implementation Method

[0029] In order to further understand the content, features and effects of the present invention, the following examples are given to explain in detail:

[0030] See Figure 1 The self-lifting telescopic platform of the present invention includes a bottom platform structure 2 arranged inside the wind turbine tower 9. Figure 9 In this embodiment, the bottom platform structure 2 includes a base 2-1 with a window 2-2 defined in the center. To facilitate installation, multiple sets of mounting lugs are welded to the base 2-1. Furthermore, to enhance the safety of the bottom platform structure 2, multiple sets of guardrails 2-4 are installed around the edges of the base 2-1. The bottom platform structure 2 also includes a circular guardrail 2-3, mounted on the base 2-1 and surrounding the window 2-2 defined in the center.

[0031] See further Figure 1Above the bottom platform structure 2, multiple groups of first platform structures 4 and second platform structures 6 are arranged at circumferential intervals and can synchronously retract inwardly and expand outwardly. Adjacent first platform structures 4 and second platform structures 6 are embedded and movable. The multiple groups of first platform structures 4 and second platform structures 6 work together to form a circular platform for workers to walk on. In addition, to drive the multiple groups of first platform structures 4 and second platform structures 6 to synchronously retract inwardly and expand outwardly, a first drive device 3 is hingedly connected between each first platform structure 4 and the bottom platform structure 2, and a second drive device 5 is hingedly connected between each second platform structure 6 and the bottom platform structure 2. The first drive device 3 and the second drive device 5 work together to drive the multiple groups of first platform structures 4 and second platform structures 6 to synchronously retract inwardly and expand outwardly to accommodate the diameter of the inner wall of the installation section of the wind turbine tower 9.

[0032] See further Figure 2 In this embodiment, the first platform structure 4 includes a first platform base 4-1 having a trapezoidal bent structure. The angles between the two bent portions of the first platform base 4-1 and the straight portion are the same obtuse angle, wherein the first platform base 4-1 is in rolling contact with the second platform structure 6. In addition, first mounting rails 4-4 are welded and fixedly connected at both edges in the longitudinal direction of the first platform base 4-1. The first mounting rails 4-4 are formed by welding and fixing multiple groups of profiles. Two groups of first bent top rods 4-2 arranged in parallel in the transverse direction are fixedly connected to the first platform base 4-1 through the first mounting rails 4-4. Each first bent top rod 4-2 has a trapezoidal bent structure that is compatible with the first platform base 4-1. In order to reduce friction between the first platform structure 4 and the second platform structure 6, a first guide wheel assembly 4-3 in rolling contact with the second platform structure 6 is installed on the outer surface of each first bent top rod 4-2.

[0033] See further Figure 3 In the present embodiment, the first guide wheel assembly 4-3 includes a guide wheel mounting plate 4-3-3 fixedly connected to the outer side surface of the first bending push rod 4-2, and the guide wheel mounting plate 4-3-3 is a trapezoidal bending structure adapted to the first bending push rod 4-2. A first guide wheel 4-3-1 in rolling contact with the second platform structure 6 is rotatably connected to the guide wheel mounting plate 4-3-3. In order to avoid damage caused by collision between the first guide wheel 4-3-1 and the second platform structure 6 when multiple groups of first platform structures 4 and multiple groups of second platform structures 6 shrink inwardly / expand outwardly synchronously, the first guide wheel assembly 4-3 also includes a top block 4-3-2 installed on the outer end surface of the first guide wheel 4-3-1. In the present embodiment, the top block 4-3-2 is made of hard rubber.

[0034] See further Figure 4In this embodiment, the second platform structure 6 includes a second platform base 6-1 with a trapezoidal bent structure. The structure of the second platform base 6-1 is the same as that of the first platform base 4-1. In addition, second mounting rails 6-5 are welded and fixed to both longitudinal edges of the second platform base 6-1. The second mounting rails 6-5 are formed by welding and fixing multiple sets of profiles. Two sets of second bent top rods 6-2 arranged in parallel in the transverse direction are fixed to the second platform base 6-1 through the second mounting rails 6-5. Each second bent top rod 6-2 has a trapezoidal bent structure that is compatible with the second platform base 6-1.

[0035] During the actual assembly process, the first platform base 4-1 is positioned above the second platform base 6-1, the two sets of first mounting rails 4-4 are positioned between the two sets of second mounting rails 6-5, and the two sets of first bent push rods 4-2 are positioned between the two sets of second bent push rods 6-2. Under the combined action of the first drive devices 3 and the second drive devices 5, the multiple sets of first platform structures 4 and the multiple sets of second platform structures 6 simultaneously contract inwardly and expand outwardly, thereby changing the outer diameter of the annular platform formed by the multiple sets of first platform structures 4 and the multiple sets of second platform structures 6, so that the platform's outer diameter adapts to the inner diameter of the different mounting sections of the wind turbine tower 9.

[0036] In addition, if Figure 4 As shown, in order to further reduce the friction between the first platform structure 4 and the second platform structure 6, the second platform structure 6 also includes a U-shaped guide groove member 6-3 with a trapezoidal bending structure fixed to each second bending top rod 6-2. The notches of the two sets of U-shaped guide groove members 6-3 are arranged relative to each other. The first guide wheel assembly 4-3 in the first platform structure 4 is located in the notch of the U-shaped guide groove member 6-3 and is in rolling contact therewith. The rotating shaft of the first guide wheel 4-3-1 is arranged horizontally so that the rolling surface of the first guide wheel 4-3-1 is in rolling contact with the bottom surface of the notch of the U-shaped guide groove member 6-3. The second platform structure 6 also includes multiple sets of second guide wheel assemblies 6-4 installed on the edge of the second platform base 6-1. The second guide wheel assemblies 6-4 are in rolling contact with the outer side surface of the first platform base 4-1.

[0037] See further Figure 5 The second guide wheel assembly 6-4 includes a guide wheel mounting seat 6-4-1 fixedly connected to the second platform base 6-1, and a second guide wheel 6-4-2 in rolling contact with the first platform base 4-1 is rotatably connected to the guide wheel mounting seat 6-4-1, and the rotating shaft of the second guide wheel 6-4-2 is vertically arranged.

[0038] like Figure 2As shown, in this embodiment, the first drive device 3 includes a first hinged bracket 3-1 disposed between the first platform base 4-1 and the base platform 2-1. The two ends of the first hinged bracket 3-1 are hingedly connected to the first platform base 4-1 and the base platform 2-1 respectively via pins. In this embodiment, the first hinged bracket 3-1 includes a main support rod made of a profile, with symmetrically arranged diagonal support rods welded to both sides of the lower portion of the main support rod. A mounting plate is welded to the upper portion of the main support rod, and corresponding ear plates are fixed to the side surfaces of the mounting plate and the first platform base 4-1. The main support rod of the first hinged bracket 3-1 and the first platform base 4-1 are hingedly connected via pins extending through the ear plates. In addition, ear plates are welded and fixed to the bottom of the main support rod and the diagonal support rod of the first hinged bracket 3-1, and are hingedly connected to the first platform base 4-1 via pins extending through the ear plates.

[0039] The first driving device 3 also includes a first driving cylinder 3-2 hingedly connected between the first articulated bracket 3-1 and the base platform 2-1, wherein the piston rod of the first driving cylinder 3-2 is hingedly connected to the ear plate installed in the middle of the main support rod through a fisheye joint, and the cylinder barrel of the first driving cylinder 3-2 is hingedly connected to the first platform base 4-1 through the ear plate and the pin shaft.

[0040] See further Figure 4 In this embodiment, the second driving device 5 includes a second articulated bracket 5-1 arranged between the second platform base 6-1 and the base platform 2-1. The structure of the second articulated bracket 5-1 is consistent with the structure of the first articulated bracket 3-1. The two ends of the second articulated bracket 5-1 are respectively hinged to the second platform base 6-1 and the base platform 2-1 through pins; and it also includes a second driving cylinder 5-2 articulatedly connected between the second articulated bracket 5-1 and the base platform 2-1.

[0041] See further Figure 1 To facilitate operators ascending from the base platform 2-1 to the platform structure, this embodiment further includes a first ladder 7 hingedly connected between each first platform structure 4 and the bottom platform structure 2, and a second ladder 8 hingedly connected between each second platform structure 6 and the bottom platform structure 2. Ear plates are welded to the top and bottom of each ladder, and are hingedly connected to the base platform 2-1 via pins passing through the ear plates.

[0042] In the actual working process, the piston rods of the first driving cylinder 3-2 and the second driving cylinder 5-2 are extended synchronously, driving the corresponding first platform structure 4 and the second platform structure 6 to expand outward synchronously. In this process, the bending parts of the first platform structure 4 and the second platform structure 6 move away from each other synchronously, thereby increasing the diameter of the annular structure formed by the multiple groups of first platform structures 4 and the multiple groups of second platform structures 6, and presenting an expanded state. Figure 11As shown, to adapt to the inner diameter of the installation section of the wind turbine tower 9; on the contrary, the piston rods of the first driving cylinder 3-2 and the second driving cylinder 5-2 are retracted synchronously, driving the corresponding first platform structure 4 and the second platform structure 6 to retract synchronously inward. During this process, the bending parts of the first platform structure 4 and the second platform structure 6 move toward each other synchronously, thereby reducing the diameter of the annular structure surrounded by the multiple groups of first platform structures 4 and the multiple groups of second platform structures 6, and presenting a contracted state as shown in FIG. Figure 10 As shown, it is adapted to the inner diameter of the mounting section of the wind turbine tower 9. Through the above arrangement, each telescopic platform is designed to have the same structure and size, and the telescopic platform is designed as a standard part, which reduces the material consumption and reduces the production cost.

[0043] like Figure 1 As shown, to achieve adjustable installation of the telescopic platform and wind turbine tower 9, this embodiment further includes a lifting drive device 1 mounted on the inner wall of the wind turbine tower 9 for driving the synchronous lifting and lowering of each platform structure. In this embodiment, the lifting drive device 1 includes lifting units mounted between the inner wall of the wind turbine tower 9 and each drive device, with multiple groups of lifting units distributed at equal angles along the circumference.

[0044] like Figure 6 、 Figure 7 and Figure 8 As shown, the lifting unit includes hanging point mounting parts 1-7 and a hoist 1-1 fixed to the inner wall of the wind turbine tower 9 in an upper and lower distribution, wherein the hanging point mounting parts 1-7 and the hoist 1-1 can be fixed to the inner wall of the wind turbine tower 9 by bolts. In addition, see further Figure 1 During the actual installation process, a mounting hole for a hanging point mounting member 1-7 is provided on the upper inner wall of each wind turbine tower mounting section. Furthermore, a fixed pulley 1-6 and a rotary connector 1-8 are mounted on the hanging point mounting member 1-7. Furthermore, a lifting lug 1-5 and a guide pulley 1-3 are mounted on the corresponding drive device. The lifting lug 1-5 and the guide pulley 1-3 are each mounted on a corresponding articulated bracket. The fixed pulley 1-6 and the guide pulley 1-3 form a lifting pulley assembly. The lifting unit also includes a lifting wire rope 1-2 and a fixed wire rope 1-4. The fixed wire rope 1-4 has one end connected to the lifting lug 1-5 and the other end connected to the rotary connector 1-8. The lifting wire rope 1-2 has one end connected to the lifting lug 1-5 and the other end passes through the fixed pulley 1-6 and the guide pulley 1-3 in sequence before connecting to the hoist 1-1. In the actual working process, multiple groups of hoists 1-1 pull the lifting wire rope 1-2 to drive the telescopic platform to move up and down, thereby adjusting the height of the telescopic platform.

[0045] Working process:

[0046] (1) During the assembly process of the wind turbine tower, first, the first tower section 9-1 is installed with a prefabricated concrete base on the ground; then, the self-lifting and telescopic platform of this embodiment is lifted and transferred to the first tower section 9-1 by a crane, and the hoists 1-1 in each lifting unit are installed on the lower part of the inner wall of the first tower section 9-1 in an equiangular distribution manner, and the hanging point mounting parts 1-7 in each lifting unit are installed on the corresponding mounting holes on the upper part of the inner wall of the first tower section 9-1. The staff can perform the installation operation on the self-lifting and telescopic platform; under the joint action of each first driving device 3 and each second driving device 5, the multiple groups of first platform structures 4 and the multiple groups of second platform structures 6 are synchronously contracted inward / synchronously expanded outward, thereby changing the outer diameter of the annular platform formed by the multiple groups of first platform structures 4 and the multiple groups of second platform structures 6, so that the outer diameter of the platform is adapted to the inner diameter of the installation section of the wind turbine tower 9; at the same time, the hoists 1-1 can also be started synchronously to adjust the height of the self-lifting and telescopic platform according to the assembly requirements of the tower installation section;

[0047] (2) Then use the crane to lift the second tower section 9-2 and transfer it to the position where it docks with the first tower section 9-1. At this time, the staff on the self-lifting telescopic platform can perform construction operations on the connection surface of the two tower installation sections, thereby realizing the connection between the two. After completing the installation of the first tower section 9-1 and the second tower section 9-2, use the crane to lift the self-lifting telescopic platform, remove the various hanging point installation parts 1-7 installed on the wind turbine tower 9, and move the self-lifting telescopic platform to a suitable position. The staff will install the various hanging point installation parts 1-7 on the installation holes of the top installation tower (here, the second tower section 9-2) (this process requires the cooperation of each hoist 1-1), and then release the installation of the self-lifting telescopic platform and the crane, and then adjust the height and outer diameter of the self-lifting telescopic platform to make it suitable for the assembly requirements of the wind turbine tower installation section.

[0048] (3) Repeat the installation operation in step 2 to install the third tower section 9-3 and other subsequent tower installation sections until the overall installation of the wind turbine tower 9 is completed; after the overall installation operation of the wind turbine tower 9 is completed, the self-lifting and telescopic platform is left inside the wind turbine tower 9 as a maintenance platform;

[0049] (4) When the self-lifting telescopic platform is used as a maintenance platform, its various hanging point mounting parts 1-7 are installed on the inner wall of the mounting section located at the top of the wind turbine tower 9. When it is necessary to adjust the height of the telescopic platform to meet maintenance needs, it is only necessary to start the various hoists 1-1 in the lifting drive device 1 to pull / release the lifting wire rope 1-2, thereby adjusting the height of the telescopic platform. The adjustment process is convenient and fast. In addition, the advantages of the self-lifting telescopic platform as a maintenance platform also include: when the wind turbine is running, the wind load is large, and other external forces are applied, the wind turbine tower is easily affected and vibrates. By installing the telescopic platform in the above-mentioned hanging installation method, the telescopic platform can be prevented from being deformed due to the vibration of the wind turbine tower 9, thereby improving the stability and safety of the telescopic platform.

Claims

1. A self-lifting telescopic platform, characterized by: The invention comprises a bottom platform structure (2) arranged inside a wind turbine tower (9), and a window (2-2) is provided on the bottom platform structure (2); a plurality of first platform structures (4) and a plurality of second platform structures (6) are arranged above the bottom platform structure (2) at intervals along the circumference and can be synchronously contracted inwardly / expanded outwardly, and adjacent first platform structures (4) and second platform structures (6) are connected in an embedded movable manner; a first driving device (3) and a first ladder (7) are hingedly connected between each first platform structure (4) and the bottom platform structure (2), and a second driving device (5) and a second ladder (8) are hingedly connected between each second platform structure (6) and the bottom platform structure (2); and a lifting driving device (1) is also provided on the inner wall of the wind turbine tower (9) for driving each platform structure to rise and fall synchronously; The lifting drive device (1) includes lifting units installed between the inner wall of the wind turbine tower (9) and each driving device, and multiple groups of lifting units are distributed at equal angles in the circumferential direction; the upper part of each lifting unit is detachably connected to the inner wall of the wind turbine tower (9); The lifting unit includes a hanging point mounting member (1-7) fixed to the inner wall of the wind turbine tower (9) and distributed in an upper and lower manner, and a hoist (1-1); a fixed pulley (1-6) and a rotary connector (1-8) are mounted on the hanging point mounting member (1-7); a lifting lug (1-5) and a guide pulley (1-3) are mounted on the corresponding driving device; a lifting wire rope (1-2) and a fixed wire rope (1-4); one end of the fixed wire rope (1-4) is connected to the lifting lug (1-5) and the other end is connected to the rotary connector (1-8); one end of the lifting wire rope (1-2) is connected to the lifting lug (1-5) and the other end is connected to the hoist (1-1) after passing through the fixed pulley (1-6) and the guide pulley (1-3) in sequence; The first platform structure (4) includes a first platform base (4-1) having a trapezoidal bending structure, and the first platform base (4-1) is in rolling contact with the second platform structure (6); two groups of first bending top rods (4-2) arranged in parallel in a transverse direction are fixedly connected to the first platform base (4-1) through a first mounting bar (4-4), and each first bending top rod (4-2) is a trapezoidal bending structure adapted to the first platform base (4-1); and a first guide wheel assembly (4-3) in rolling contact with the second platform structure (6) is installed on the outer surface of each first bending top rod (4-2).

2. The self-lifting telescopic platform according to claim 1, characterized in that: The first guide wheel assembly (4-3) includes a guide wheel mounting plate (4-3-3) fixedly connected to the outer side surface of the first bent top rod (4-2), a first guide wheel (4-3-1) rotatably connected to the guide wheel mounting plate (4-3-3) and in rolling contact with the second platform structure (6), and also includes a top block (4-3-2) mounted on the outer end surface of the first guide wheel (4-3-1).

3. The self-lifting telescopic platform according to claim 1, characterized in that: The second platform structure (6) comprises a second platform base (6-1) with a trapezoidal bending structure, two groups of second bending top rods (6-2) arranged in a transverse parallel manner are fixedly connected to the second platform base (6-1) via a second mounting bar (6-5), and each second bending top rod (6-2) is a trapezoidal bending structure adapted to the second platform base (6-1); a U-shaped guide groove member (6-3) with a trapezoidal bending structure is fixedly connected to each second bending top rod (6-2), and the notches of the two groups of U-shaped guide groove members (6-3) are arranged relative to each other and in rolling contact with the first guide wheel assembly (4-3); and a plurality of groups of second guide wheel assemblies (6-4) are also included, which are installed on the edge of the second platform base (6-1) and in rolling contact with the first platform base (4-1).

4. The self-elevating telescopic platform according to claim 3, characterized in that: The second guide wheel assembly (6-4) comprises a guide wheel mounting seat (6-4-1) fixedly connected to the second platform base (6-1), and a second guide wheel (6-4-2) in rolling contact with the first platform base (4-1) is rotatably connected to the guide wheel mounting seat (6-4-1).

5. The self-lifting telescopic platform according to claim 1, characterized in that: The first driving device (3) comprises a first articulated bracket (3-1) arranged between the first platform base (4-1) and the bottom platform structure (2), with both ends of the first articulated bracket (3-1) being articulated with the first platform base (4-1) and the bottom platform structure (2) respectively via pins; and further comprises a first driving oil cylinder (3-2) articulatedly connected between the first articulated bracket (3-1) and the bottom platform structure (2).

6. The self-elevating telescopic platform according to claim 3, characterized in that: The second driving device (5) comprises a second articulated bracket (5-1) arranged between the second platform base (6-1) and the bottom platform structure (2), with both ends of the second articulated bracket (5-1) being articulated with the second platform base (6-1) and the bottom platform structure (2) respectively via pins; and further comprises a second driving oil cylinder (5-2) articulatedly connected between the second articulated bracket (5-1) and the bottom platform structure (2).

7. The self-elevating telescopic platform according to claim 1, characterized in that: The bottom platform structure (2) includes a base platform (2-1) hingedly connected to each drive device and each ladder, and multiple sets of guardrails (2-4) are installed on the edge of the base platform (2-1); and also includes a ring-shaped guardrail (2-3) installed on the base platform (2-1) and surrounding a window (2-2) opened in the middle thereof.

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