Wind turbine tower platform lifting device and lifting method

Abstract

A wind turbine tower platform lifting equipment and lifting method, including a platform assembly arranged on the outside of the tower, a guide rail assembly with a spiral structure is provided on the outside of the tower below the platform plate, the guide rail assembly is fixedly connected to the platform assembly, and a rack structure is provided on the periphery of the guide rail assembly; multiple clamping drive devices are distributed on the guide rail assembly, and a single clamping drive device can move along the spiral direction of the guide rail assembly; at the same time, the clamping drive device drives the bearing block to be close to or away from the outer side surface of the tower through a transverse movement mechanism; when multiple bearing blocks are simultaneously close to the outer side surface of the tower, the clamping drive device carries the guide rail assembly, and then the guide rail assembly supports the platform assembly, the driving motors of multiple clamping drive devices are turned on, and the guide rail assembly rotates relative to the tower under the cooperation of the gear at the end of the driving motor and the rack structure, so as to realize the lifting and lowering of the platform assembly, so that the working platform can not only be fixed on the wind turbine tower, but also can be lifted and lowered, thereby ensuring the convenience and safety of high-altitude operations.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine tower maintenance equipment, and in particular to a wind turbine tower platform lifting device and a lifting method. Background Art

[0002] A wind turbine tower is the mast of a wind turbine generator. It primarily supports the wind turbine and absorbs vibrations. To improve power generation efficiency and extend the service life of the wind turbine tower, ensuring stable operation of the wind turbine, regular inspection and maintenance of the wind turbine tower is necessary.

[0003] The installation, construction, maintenance and upkeep of wind turbine tower components all require high-altitude work, which is usually carried out in two ways: one is to use a crane in conjunction with a cage, and the other is to extend a rope from the top and then hang the worker.

[0004] The first type of crane has height restrictions, while the second type is more susceptible to environmental influences. In particular, both types are suspended and operate at high altitudes, which lacks safety guarantees. For example, in the event of a sudden strong wind, the safety hazard is particularly serious. Summary of the Invention

[0005] In response to the shortcomings of the above-mentioned existing production technology, the applicant provides a wind turbine tower platform lifting equipment and lifting method, so that the working platform can not only be fixed on the wind turbine tower, but also be lifted and lowered, ensuring the convenience and safety of high-altitude operations.

[0006] The technical solutions adopted in the present invention are as follows:

[0007] A wind turbine tower platform lifting device includes a platform assembly arranged outside the tower, the platform assembly includes a platform plate and a support assembly installed below the platform plate, and the support assembly is in multiple numbers and evenly distributed around the tower;

[0008] The outer portion of the tower below the platform plate is provided with a guide rail assembly with a spiral structure, the guide rail assembly is fixedly connected to the support assembly, and a rack structure is provided on the outer periphery of the guide rail assembly;

[0009] It also includes a plurality of clamping drive devices, the number of which is greater than or equal to five and evenly distributed on the guide rail assembly, the number of spiral turns of the guide rail assembly is at least one, and the structure of a single clamping drive device is:

[0010] The drive frame comprises a drive motor installed on one side of the drive frame, and a gear meshing with the rack structure is installed on the output end of the drive motor.

[0011] The drive frame is provided with a guide wheel assembly that cooperates with the guide rail assembly. The guide wheel assembly is used to limit the relative position of the drive frame and the guide rail assembly so that the gear can move along the spiral direction of the guide rail assembly while being engaged with the rack structure.

[0012] The driving frame is further provided with a transverse movement mechanism, one end of which is connected to the driving frame, and the other end of which is provided with a bearing block, which cooperates with the outer side surface of the tower, and the transverse movement mechanism drives the bearing block to be close to or away from the outer side surface of the tower;

[0013] A plurality of bearing blocks simultaneously press against the outer side surface of the tower so that the clamping drive device carries the guide rail assembly, thereby enabling the guide rail assembly to support the platform assembly;

[0014] A plurality of driving motors corresponding to the bearing blocks close to the tower are turned on, and the guide rail assembly rotates relative to the tower under the drive of the gear, thereby realizing the lifting and lowering of the platform assembly.

[0015] Its further technical solution is:

[0016] The structure of the transverse movement mechanism is as follows:

[0017] It includes a traverse motor and a sliding frame, both of which are fixedly mounted on the driving frame, and the sliding frame is located on one side of the output end of the traverse motor;

[0018] A threaded rod is installed at the output end of the traverse motor, and a special-shaped nut is slidably installed on the sliding frame. The special-shaped nut is provided with a threaded hole that cooperates with the threaded rod. The threaded rod rotates under the drive of the traverse motor, thereby driving the special-shaped nut to move forward and backward relative to the sliding frame along the axial direction of the threaded hole;

[0019] It also includes a push rod, one end of which is mounted with the bearing block, the other end of which is connected to the special-shaped nut via a pressure sensor, and the axial direction of the push rod is consistent with the axial direction of the threaded hole.

[0020] The wind turbine tower platform lifting device according to claim 2, wherein the structure of the sliding frame comprises: a first sliding portion, a first sliding hole is provided on the first sliding portion, and a guide portion is provided on one side of the first sliding portion in a spaced and parallel manner;

[0021] The structure of the special-shaped nut is as follows: it includes a columnar body, the threaded hole is arranged inside one end of the columnar body, the outer periphery of the columnar body is slidably matched with the first sliding hole, the other end of the columnar body is a connecting part, the connecting part is connected to the pressure sensor, and a guide plate is arranged in the middle of the columnar body, and the two sides of the guide plate are respectively matched with two guide parts.

[0022] One end of the top rod is provided with an electromagnet that cooperates with the bearing block. When the electromagnet is working, the bearing block is pressed tightly against the tower.

[0023] The structure of the guide rail assembly is as follows: it includes a plurality of segmented spiral plates connected end to end, the connection points of adjacent segmented spiral plates are connected by connecting blocks, the outer periphery of the segmented spiral plates is provided with the rack structure, the inner periphery of the segmented spiral plates is provided with a stop bar perpendicular to the segmented spiral plates, the length direction of the stop bar is consistent with the spiral direction of the guide rail assembly, and the stop bar and the segmented spiral plates are simultaneously coordinated with the guide wheel assembly.

[0024] The gear is located on the lower surface of the driving frame;

[0025] The structure of the guide wheel assembly is as follows: it includes a roller frame, the roller frame is arranged on the lower surface of the driving frame opposite to the gear, and also includes an upper roller rotatably mounted on the lower surface of the driving frame and a lower roller mounted on the roller frame, the upper roller cooperates with the upper surface of the segmented spiral plate, the lower roller cooperates with the lower surface of the segmented spiral plate, and the roller frame is also equipped with an inner roller and an outer roller, the inner roller cooperates with the inner ring of the gear bar, and the outer roller cooperates with the lower part of the outer ring of the gear bar.

[0026] In one spiral turn of the guide rail assembly, the number of the segmented spiral plates is greater than or equal to three.

[0027] A method for lifting a wind turbine tower platform lifting device comprises the following steps:

[0028] S1: Adjust the initial position of the platform assembly, and make all the clamping drive devices evenly distributed on the guide rail assembly, start the transverse movement mechanisms of all the clamping drive devices, and make the bearing blocks close to the outer side surface of the tower;

[0029] S2: Keep the bearing block of the first clamping drive device on the starting side of the predetermined moving direction of the platform assembly away from the tower;

[0030] S3: Start the driving motor of the first clamping drive device, so that the first clamping drive device moves along the spiral direction consistent with the predetermined moving direction of the platform assembly to the side of the clamping drive device adjacent to the first clamping drive device,

[0031] S4: starting the transverse movement mechanism of the first clamping drive device to drive the bearing block to be close to the outer side surface of the tower;

[0032] S5: Repeat the action of the first clamping drive device in S2-S4 with the clamping drive device adjacent to the first clamping drive device, and then complete the action of S2-S4 with all the clamping drive devices in sequence;

[0033] S6: Keep the bearing blocks of all the clamping drive devices close to the outer side of the tower; start the drive motors on all the clamping drive devices, drive the guide rail assembly to move along the predetermined moving direction of the platform assembly through the rotation of the gears, and then drive the platform assembly to move;

[0034] S7: Repeat S2-S6 to gradually move the platform assembly to a predetermined position.

[0035] As a further improvement of the above technical solution:

[0036] In step S2, while ensuring that the lifting device can be securely fixed to the tower, the other one or more bearing blocks are kept away from the tower;

[0037] The clamping drive device corresponding to the tower bearing block detached in step S2 and its adjacent clamping drive device all repeat the actions of the first clamping drive device and its adjacent clamping drive device in S2-S5.

[0038] The beneficial effects of the present invention are as follows:

[0039] The present invention has a compact and reasonable structure and is easy to operate. A spiral structure guide rail assembly is sleeved on the outside of the tower, and a platform assembly is installed on the guide rail assembly. The guide rail assembly is fixed to the tower through multiple clamping drive devices that can move along the spiral direction of the guide rail assembly. The working platform can not only be fixed on the wind turbine tower, but also the platform assembly can be raised and lowered through the relative movement of the clamping drive device and the guide rail assembly, thereby ensuring the convenience and safety of high-altitude operations.

[0040] At the same time, the present invention also has the following advantages:

[0041] (1) The threaded rod is driven to rotate by the transverse motor, and the special-shaped nut installed at the end of the threaded rod is driven to slide on the sliding frame, thereby realizing the forward and backward movement of the bearing block at the end of the top rod. After the transverse motor stops, the thread is self-locked to ensure that the axial force applied to the bearing block is constant. The special-shaped nut and the top rod are connected by a pressure sensor to monitor the axial force provided by the transverse motor in real time to prevent the bearing block from exerting excessive pressure on the tower and causing damage to the tower. At the same time, appropriate axial force is guaranteed to ensure sufficient friction to ensure the safety of the lifting equipment and the clamping drive device during use.

[0042] (2) An electromagnet that cooperates with the bearing block is set at one end of the top rod. When the electromagnet is working, the bearing block is pressed against the tower, and the bearing block fits more firmly with the tower, so that the friction provided by the bearing block is maximized, ensuring that when the guide rail assembly rotates relative to the tower, the clamping drive device itself does not rotate circumferentially.

[0043] (3) Increasing the number of segmented spiral plates in one spiral circle not only facilitates the transportation of the guide rail assembly after disassembly, but also makes it easier for the lifting equipment to increase or decrease the length of the entire guide rail assembly when matching the operating requirements of different load capacities, so that the guide rail assembly provides sufficient layout space for the clamping drive device while reducing the overall weight of the guide rail assembly, further ensuring the rationality and safety of the lifting equipment structure.

[0044] (4) Multiple load-bearing blocks evenly distributed on the guide rail assembly are simultaneously kept out of the tower, that is, there are multiple target clamping drive devices, and the multiple target clamping drive devices are grouped and moved simultaneously. When the number of clamping drive devices is large or the number of spiral turns of the guide rail assembly is large, the platform assembly can be quickly raised and lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of the present invention.

[0046] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0047] Figure 3 It is a structural schematic diagram of the present invention (another perspective).

[0048] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0049] Figure 5 It is a structural schematic diagram of the clamping drive device of the present invention.

[0050] Figure 6 Schematic diagram of the structure of the clamping drive device of the present invention (from another perspective).

[0051] Figure 7 This is an axial sectional view of the clamping drive device of the present invention.

[0052] Figure 8 Schematic diagram of the structure of the sliding frame of the present invention.

[0053] Figure 9 It is a structural schematic diagram of the special-shaped nut of the present invention.

[0054] Figure 10 It is a structural schematic diagram of the special-shaped nut of the present invention (from another perspective).

[0055] Figure 11 Schematic diagram of the structure of the guide rail assembly of the present invention (exploded state).

[0056] Figure 12 Schematic diagram of the structure of the platform assembly of the present invention (explosion state).

[0057] Figure 13 This is a structural diagram of the present invention when the guide rail assembly is one circle and the clamping drive devices are five.

[0058] Figure 14 This is the first ascending process of the platform assembly of the present invention (including only the guide rail assembly and the clamping drive device).

[0059] Figure 15 This is the second process of the platform assembly rising of the present invention (including only the guide rail assembly and the clamping drive device).

[0060] Figure 16 This is the third rising process of the platform assembly of the present invention (including only the guide rail assembly and the clamping drive device).

[0061] Figure 17 This is the fourth rising process of the platform assembly of the present invention (including only the guide rail assembly and the clamping drive device).

[0062] Among them: 1. Tower;

[0063] 2. Platform assembly; 201. Platform plate; 202. Connector; 203. Support assembly; 204. Support rod;

[0064] 3. Guide rail assembly; 301. Segmented spiral plate; 302. Connecting block; 303. Rack structure; 304. Gear bar;

[0065] 4. Clamping drive device; 41. Gear; 42. Drive motor; 43. Drive frame;

[0066] 44. Transverse movement mechanism; 4401. Transverse movement motor; 4402. Sliding frame; 4403. Ejector rod; 4404. Electromagnet; 4405. Pressure sensor; 4406. Special-shaped nut; 4407. Threaded rod;

[0067] 44021, first sliding portion; 44022, guide portion; 44023, second sliding portion; 44024, first sliding hole; 44025, second sliding hole;

[0068] 44061. Columnar body; 44062. Guide plate; 44063. Connecting portion;

[0069] 45. Carrying block; 46. Guide wheel assembly; 4601. Upper roller; 4602. Lower roller; 4603. Outer roller; 4604. Inner roller; 4605. Roller frame;

[0070] 4a, first clamping drive; 4b, second clamping drive; 4c, third clamping drive; 4d, fourth clamping drive; 4e, fifth clamping drive; 4f, sixth clamping drive; 4g, seventh clamping drive. DETAILED DESCRIPTION

[0071] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0072] Example 1:

[0073] like Figures 1-4 As shown, the wind turbine tower platform lifting device of this embodiment includes a platform assembly 2 disposed outside the tower 1. The platform assembly 2 includes a platform plate 201 and a support assembly 203 mounted below the platform plate 201. The platform plate 201 of the platform assembly 2 can be designed according to actual needs and can be mounted outside the tower 1 or located on one side of the tower 1.

[0074] The tower 1 below the platform plate 201 is provided with a spiral guide rail assembly 3, which is fixedly connected to the support assembly 203. A rack structure 303 is provided on the periphery of the guide rail assembly 3. The rack structure 303 is arranged along the outer side of the guide rail assembly 3 and is consistent with the spiral direction of the spiral structure of the guide rail assembly 3.

[0075] It also includes multiple clamping drive devices 4, the number of which is greater than or equal to five and evenly distributed on the guide rail assembly 3, and the number of spiral turns of the guide rail assembly 3 is at least one turn.

[0076] The structure of a single clamping drive device 4 is:

[0077] It includes a drive frame 43, a drive motor 42 is mounted on one side of the drive frame 43, and a gear 41 meshing with the rack structure 303 is mounted on the output end of the drive motor 42;

[0078] A guide wheel assembly 46 is mounted on the drive frame 43 and cooperates with the guide rail assembly 3. The guide wheel assembly 46 is used to limit the relative position of the drive frame 43 and the guide rail assembly 3, so that the gear 41 can move along the spiral direction of the guide rail assembly 3 while being engaged with the rack structure 303;

[0079] A transverse movement mechanism 44 is also mounted on the driving frame 43. One end of the transverse movement mechanism 44 is connected to the driving frame 43. A bearing block 45 is mounted on the other end of the transverse movement mechanism 44. The bearing block 45 cooperates with the outer side surface of the tower 1. The transverse movement mechanism 44 drives the bearing block 45 to be close to or away from the outer side surface of the tower 1.

[0080] The multiple bearing blocks 45 simultaneously cling to the outer side surface of the tower 1 so that the clamping drive device 4 carries the guide rail assembly 3 , and further the guide rail assembly 3 supports the platform assembly 2 .

[0081] Specifically, the structure in which the gear 41 meshes with the rack structure 303 is used to drive the relative movement of the clamping drive device 4 and the guide rail assembly 3; the guide wheel assembly 46 mainly plays the role of guiding and connecting the clamping drive device 4 and the guide rail assembly 3; the transverse movement mechanism 44 can be driven by a hydraulic cylinder or a cylinder to directly generate an axial force to drive the bearing block 45 to move, or it can be converted into an axial displacement by the rotation of a motor to drive the bearing block 45 to move; the bearing block 45 has a larger plane or arc-shaped surface for contact with the tower 1, which depends on the specific structure of the tower 1 and the load-bearing requirements, and is used to increase the contact area between the clamping drive device 4 and the tower 1. When the transverse movement mechanism 44 drives the bearing block 45 to stick to the outer side of the tower 1, the friction between the bearing block 45 and the tower 1 makes the lifting equipment stable on the tower 1.

[0082] The driving motors 42 corresponding to the multiple bearing blocks 45 close to the tower 1 are turned on, and the guide rail assembly 3 rotates relative to the tower 1 under the drive of the gear 41, thereby realizing the lifting and lowering of the platform assembly 2.

[0083] In addition, since multiple clamping drive devices 4 are evenly spaced, while meeting the load-bearing requirements of the lifting equipment, after one or more load-bearing blocks 45 are detached from the tower 1, the position of the corresponding clamping drive device 4 on the guide rail assembly 3 is adjusted, and the load-bearing block 45 is re-attached to the outer side of the tower 1, and the adjacent clamping drive devices 4 are adjusted in turn, so that all the clamping drive devices 4 move the same distance; after all the load-bearing blocks 45 are attached to the outer side of the tower 1, the drive motor 42 of the clamping drive device 4 is turned on again; all the clamping drive devices 4 move multiple times, so that the guide rail assembly 3 rotates step by step multiple times, thereby continuously changing the position of the platform assembly 2.

[0084] Increasing the number of turns of the guide rail assembly 3 can provide a larger moving space for the installation of the clamping drive device 4, and more clamping drive devices 4 can be arranged to make the connection between the lifting equipment and the tower 1 more stable.

[0085] like Figure 13 As shown, when there are five clamping drive devices 4 evenly distributed along a circle of guide rail assemblies 3, only one of the clamping drive devices 4 can disengage its bearing block 45 from the tower 1. This ensures that when the clamping drive device 4 is in a moving position, four drive devices can secure the guide rail assembly 3 from four evenly distributed positions along the circumference, forming a balanced force system in the X and Y directions. The friction generated by the bearing block 45 balances the weight of the lifting device in the Z direction. The overall length of a circle of guide rail assemblies 3 requires a reserved cross-section at the end to accommodate the travel distance of one clamping drive device 4.

[0086] By sleeve-mounting a spiral structure guide rail assembly 3 on the outside of the tower 1 and installing the platform assembly 2 on the guide rail assembly 3, the guide rail assembly 3 is fixed to the tower 1 through multiple clamping drive devices 4 that can move along the spiral direction of the guide rail assembly 3, so that the working platform can not only be fixed on the wind turbine tower 1, but also the platform assembly 2 can be raised and lowered through the relative movement of the clamping drive device 4 and the guide rail assembly 3, thereby ensuring the convenience and safety of high-altitude operations.

[0087] Example 2:

[0088] On the basis of the first embodiment, the structure of the transverse movement mechanism 44 is further optimized, and the specific solution is as follows:

[0089] like Figure 5-Figure 7 As shown, the structure of the transverse movement mechanism 44 is:

[0090] It includes a traverse motor 4401 and a sliding frame 4402, both of which are fixedly mounted on the driving frame 43, and the sliding frame 4402 is located on the output end side of the traverse motor 4401;

[0091] A threaded rod 4407 is mounted on the output end of the traverse motor 4401. A special-shaped nut 4406 is slidably mounted on the slide frame 4402. The special-shaped nut 4406 is provided with a threaded hole that cooperates with the threaded rod 4407. Driven by the traverse motor 4401, the threaded rod 4407 rotates, thereby driving the special-shaped nut 4406 to move forward and backward relative to the slide frame 4402 along the axis of the threaded hole.

[0092] It also includes a push rod 4403, one end of which is mounted with a bearing block 45, and the other end of the push rod 4403 is connected to a special-shaped nut 4406 via a pressure sensor 4405, and the axial direction of the push rod 4403 is consistent with the axial direction of the threaded hole.

[0093] Specifically, the threads of the threaded rod 4407 and the threaded hole are rectangular thread structures, which can increase the bearing capacity; when the threaded rod 4407 rotates, the special-shaped nut 4406 slides on the sliding frame 4402, and the sliding frame 4402 limits the rotation of the special-shaped nut 4406. Therefore, when the threaded rod 4407 rotates, it drives the special-shaped nut 4406 to move back and forth; the pressure sensor 4405 is a purchased part, and the DYLY series sensor of the Ocean Sensing brand can be used.

[0094] The threaded rod 4407 is driven to rotate by the transverse motor 4401, and the special-shaped nut 4406 installed at the end of the threaded rod 4407 is driven to slide on the sliding frame 4402, thereby realizing the forward and backward movement of the supporting block 45 at the end of the top rod 4403. After the transverse motor 4401 stops, the thread is self-locked to ensure that the axial force applied to the supporting block 45 is constant. The special-shaped nut 4406 and the top rod 4403 are connected through the pressure sensor 4405 to monitor the axial force provided by the transverse motor 4401 in real time, to prevent the supporting block 45 from exerting excessive pressure on the tower 1 and causing damage to the tower 1, while ensuring appropriate axial force and sufficient friction to ensure the safety of the lifting equipment and the clamping drive device 4 during use.

[0095] like Figure 6-Figure 8 As shown, the structure of the sliding frame 4402 in this embodiment is as follows: it includes a first sliding portion 44021, a first sliding hole 44024 is provided on the first sliding portion 44021, and a guide portion 44022 is provided on one side of the first sliding portion 44021 in a spaced and parallel manner;

[0096] The structure of the special-shaped nut 4406 in this embodiment is: it includes a columnar body 44061, a threaded hole is arranged inside one end of the columnar body 44061, the outer periphery of the columnar body 44061 is slidably matched with the first sliding hole 44024, the other end of the columnar body 44061 is a connecting part 44063, the connecting part 44063 is connected to the pressure sensor 4405, and a guide plate 44062 is arranged in the middle of the columnar body 44061, and the two sides of the guide plate 44062 are respectively matched with the two guide parts 44022.

[0097] The sliding frame 4402 and the special-shaped nut 4406 have a simple structure and are easy to process.

[0098] Furthermore, the structure of the sliding frame 4402 also includes a second sliding part 44023, a second sliding hole 44025 is provided on the second sliding part 44023, the pressure sensor 4405 is located between the first sliding part 44021 and the second sliding part 44023, and the second sliding part 44023 cooperates with the outer peripheral surface of the push rod 4403.

[0099] The second sliding portion 44023 is provided to support the guide push rod 4403, making the structure of the transverse movement mechanism 44 more stable.

[0100] like Figure 5-Figure 7As shown, in order to further ensure the stability of the relative position of the bearing block 45 and the tower 1, and further ensure that the bearing block 45 is in full contact with the fitting surface of the tower 1, an electromagnet 4404 cooperating with the bearing block 45 is provided at one end of the top rod 4403. When the electromagnet 4404 is working, the bearing block 45 is pressed tightly against the tower 1. The tower 1 has ferromagnetism, and the bearing block 45 fits more firmly with the tower 1, so that the friction force provided by the bearing block 45 is maximized, thereby ensuring that when the guide rail assembly 3 rotates relative to the tower 1, the clamping drive device 4 itself does not rotate circumferentially.

[0101] like Figure 11 As shown, the structure of the guide rail assembly 3 in this embodiment is: it includes a plurality of segmented spiral plates 301 connected end to end, the connection points of adjacent segmented spiral plates 301 are connected by connecting blocks 302, a rack structure 303 is provided on the outer periphery of the segmented spiral plate 301, and a stop bar 304 perpendicular to the segmented spiral plate 301 is provided on the inner periphery of the segmented spiral plate 301, the length direction of the stop bar 304 is consistent with the spiral direction of the guide rail assembly 3, and the stop bar 304 and the segmented spiral plate 301 are simultaneously coordinated with the guide wheel assembly 46.

[0102] The guide rail assembly 3 formed by segmented splicing is convenient for transportation and installation, and the number of segments of each circle of the guide rail assembly 3 is determined according to actual conditions.

[0103] like Figure 2-Figure 7 As shown, in this embodiment, the gear 41 is located on the lower surface of the drive frame 43; the structure of the guide wheel assembly 46 is: it includes a roller frame 4605, the roller frame 4605 is arranged on the lower surface of the drive frame 43 opposite to the gear 41, and also includes an upper roller 4601 rotatably installed on the lower surface of the drive frame 43 and a lower roller 4602 installed on the roller frame 4605, the upper roller 4601 cooperates with the upper surface of the segmented spiral plate 301, and the lower roller 4602 cooperates with the lower surface of the segmented spiral plate 301, and the roller frame 4605 is also equipped with an inner roller 4604 and an outer roller 4603, the inner roller 4604 cooperates with the inner ring of the stop bar 304, and the outer roller 4603 cooperates with the lower part of the outer ring of the stop bar 304.

[0104] By arranging multiple rollers on the drive frame 43 and the roller frame 4605, the upper roller 4601 and the lower roller 4602 cooperate with the segmented spiral plate 301 to limit the vertical displacement of the guide rail assembly 3 and the clamping drive device 4; the radial displacement of the guide rail assembly 3 and the clamping drive device 4 is limited by the inner roller 4604 and the outer roller 4603 to ensure that the clamping drive device 4 does not disengage from the guide rail assembly 3 and at the same time the gear 41 is well engaged with the rack structure 303.

[0105] When further considering the structure of the guide rail assembly 3, the number of the segmented spiral plates 301 is greater than or equal to three in one spiral circle of the guide rail assembly 3. For example, the segmented spiral plates 301 can be arranged at angles of 90° or 45° in the circumferential direction.

[0106] Increasing the number of segmented spiral plates 301 in one spiral circle not only facilitates the transportation of the guide rail assembly 3 after disassembly, but also makes it easier for the lifting equipment to increase or decrease the length of the entire guide rail assembly 3 when matching the operating requirements of different load capacities, so that the guide rail assembly 3 provides sufficient layout space for the clamping drive device 4 while reducing the overall weight of the guide rail assembly 3, further ensuring the rationality and safety of the lifting equipment structure.

[0107] like Figures 1-4 、 Figure 12 As shown, the platform plate 201 is a semicircular ring structure, and the joints of the two platform plates 201 are connected by a connector 202;

[0108] There are multiple support assemblies 203, which are evenly distributed around the tower 1. The upper end of the support assembly 203 is connected to the platform plate 201, and the lower part of the support assembly 203 is provided with a support rod 204 connected to the lower part of each circle of guide rail assembly 3.

[0109] The platform plates 201 are separated at 180° in the circumferential direction, and this structure is convenient for transportation and installation.

[0110] Example 3:

[0111] like Figure 13-17 As shown, this embodiment introduces a lifting method for a wind turbine tower platform lifting device based on the structures of the first and second embodiments, and the steps are as follows:

[0112] S1: Adjust the initial position of the platform assembly 2 and evenly distribute all the clamping drive devices 4 on the guide rail assembly 3, start the transverse movement mechanisms 44 of all the clamping drive devices 4, and make the bearing blocks 45 close to the outer side surface of the tower 1.

[0113] Specifically, the initial position is at the bottom of the tower 1 for a newly installed lifting device, and is the current working height for a tower 1 that has climbed to a certain height.

[0114] S2: Keep the bearing block 45 of the first clamping drive device 4 on the starting side of the predetermined moving direction of the platform assembly 2 away from the tower 1.

[0115] Specifically, the predetermined moving direction is that the platform component 2 needs to rise or fall.

[0116] When the platform assembly 2 needs to rise, the starting side of the predetermined moving direction is the lower part of the guide rail assembly 3;

[0117] When the platform assembly 2 needs to descend, the starting side of the predetermined moving direction is the upper part of the guide rail assembly 3 .

[0118] The first clamping drive 4 is located at the end of the guide rail assembly 3, as shown in FIG. Figure 13 、 Figure 14 shown.

[0119] S3: Start the driving motor 42 of the first clamping drive device 4, so that the first clamping drive device 4 moves along the spiral direction consistent with the predetermined moving direction of the platform assembly 2 to the side of the clamping drive device 4 adjacent to the first clamping drive device 4, such as Figure 14 、 Figure 15 shown.

[0120] Specifically, when the platform assembly 2 needs to rise, the spiral direction is upward, and when the platform assembly 2 needs to descend, the spiral direction is downward.

[0121] S4: Start the transverse movement mechanism 44 of the first clamping drive device 4 to drive the bearing block 45 to be close to the outer side surface of the tower 1.

[0122] S5: repeat the action of the first clamping drive device 4 in S2-S4 with the clamping drive device 4 adjacent to the first clamping drive device 4, and then complete the action of S2-S4 with all the clamping drive devices 4 in sequence. Figure 16 shown.

[0123] Specifically, all the clamping drive devices 4 are completed S2-S4 actions in sequence, that is, all the clamping drive devices 4 are moved the same distance; the clamping drive device 4 that is moved each time is the target clamping drive device 4; the target clamping drive device 4 is changed successively along the spiral direction, and each adjustment treats the target clamping drive device 4 as the new first clamping drive device 4 until all the clamping drive devices 4 are moved the same distance along the spiral direction.

[0124] S6: Keep the bearing blocks 45 of all the clamping drive devices 4 close to the outer side of the tower 1; start the drive motors 42 on all the clamping drive devices 4, and drive the guide rail assembly 3 to move along the predetermined moving direction of the platform assembly 2 through the rotation of the gear 41, thereby driving the platform assembly 2 to move, such as Figure 17 shown.

[0125] S7: Repeat S2-S6 to gradually move the platform assembly 2 to a predetermined position.

[0126] like Figure 14-17 As shown, taking seven clamping drive devices 4 as an example, the working principle of the lifting device is specifically introduced:

[0127] The first clamping drive 4a, the second clamping drive 4b, the third clamping drive 4c, the fourth clamping drive 4d, the fifth clamping drive 4e, the sixth clamping drive 4f, and the seventh clamping drive 4g all have the same structure as the clamping drive device 4 and are evenly distributed on the guide rail assembly 3 at 90°.

[0128] The first clamping drive 4a, the third clamping drive 4c and the fifth clamping drive 4e form a balancing force system in the X direction, which limits the movement of the guide rail assembly 3 in the X direction and the rotation around the Y direction.

[0129] The second clamping drive 4b, the fourth clamping drive 4d and the sixth clamping drive 4f form a balancing force system in the Y direction, which limits the movement of the guide rail assembly 3 in the Y direction and the rotation around the X direction.

[0130] The friction between the corresponding six bearing blocks 45 and the tower 1 limits the movement of the guide rail assembly 3 in the Z direction and the rotation around the Z direction.

[0131] As mentioned above, the six degrees of freedom of the lifting device are all restricted.

[0132] When the platform assembly 2 needs to rise, the seventh clamping drive 4g is located at the lower end of the guide rail assembly 3 and serves as the first clamping drive device 4 in S2.

[0133] First, the supporting block 45 of the seventh clamping drive 4 g is kept in a state of being separated from the tower 1 .

[0134] Then, the driving motor 42 of the seventh clamping drive 4g drives the gear 41 to rotate, thereby driving the seventh clamping drive 4g to rotate upward clockwise along the guide rail assembly 3.

[0135] When the seventh clamping drive 4g rotates to be close to the first clamping drive 4a, the drive motor 42 stops, and the transverse movement mechanism 44 of the seventh clamping drive 4g is started to make the bearing block 45 close to the tower 1.

[0136] Then the transverse movement mechanism 44 of the first clamping drive 4a is started to separate the bearing block 45 of the first clamping drive 4a from the tower 1. After separation, the drive motor 42 is started to drive the first clamping drive 4a to rotate clockwise upward along the guide rail assembly 3. When it rotates to be close to the second clamping drive 4b, the drive motor 42 of the second clamping drive 4b stops, and the transverse movement mechanism 44 of the second clamping drive 4b is started to make the bearing block 45 close to the tower 1. Repeat the above actions until the third clamping drive 4c, the fourth clamping drive 4d, the fifth clamping drive 4e, and the sixth clamping drive 4f all complete the same actions mentioned above, and all clamping drive devices have moved the same distance along the spiral direction.

[0137] During the movement of the clamping drive, only one of the bearing blocks 45 of the clamping drive is not in close contact with the tower 1. The bearing blocks 45 of the other clamping drive are all in close contact with the tower 1. In other words, the clamping drive devices involved in fixing the guide rail assembly 3 to the tower 1 account for 6 / 7 of the total. The more clamping drive devices are installed, the higher the proportion. In addition, due to the spiral arrangement, more spiral drive devices can be arranged for safety protection according to safety requirements, greatly improving equipment safety.

[0138] When all the clamping drive devices have completed their rotation and all the supporting blocks 45 are close to the tower 1, the drive motors 42 of all the clamping drive devices are started. Since there is friction between the clamping drive device and the wind turbine tower 1 to prevent the circumferential rotation of the clamping drive device, the guide rail assembly 3 is driven to rotate clockwise under the engagement of the gear 41 and the rack structure 303, and then the platform assembly 2 is driven to rise, thereby realizing the rising function.

[0139] Similarly, operating in the opposite direction can achieve the descending function.

[0140] Example 4:

[0141] On the basis of the third embodiment, in step S2, while ensuring that the lifting device can be securely fixed on the tower 1, the other one or more bearing blocks 45 are kept away from the tower 1;

[0142] The clamping drive device 4 corresponding to the bearing block 45 of the detached tower 1 in step S2 and its adjacent clamping drive device 4 all repeat the actions of the first clamping drive device 4 and its adjacent clamping drive device 4 in steps S2-S5.

[0143] Specifically, when the guide rail assembly 3 is one circle, the number of clamping drive devices 4 evenly distributed in the circumferential direction needs to be greater than 5. When the guide rail assembly 3 has multiple spiral circles, each circle in step S2 can have a bearing block 45 to maintain a state of being detached from the tower 1.

[0144] In step S2, multiple load-bearing blocks 45 are simultaneously kept away from the tower 1, that is, there are multiple target clamping drive devices 4. The multiple target clamping drive devices 4 are grouped and moved simultaneously. When the number of clamping drive devices 4 is large or the number of spiral turns of the guide rail assembly 3 is large, the platform assembly 2 can be quickly raised and lowered.

[0145] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any modifications may be made within the scope of protection of the present invention.

Claims

1. A wind turbine tower platform lifting device, characterized by: The platform assembly (2) comprises a platform plate (201) and a support assembly (203) installed at the bottom of the platform plate (201). The support assembly (203) is plural and evenly distributed around the tower (1). A guide rail assembly (3) with a spiral structure is sleeved on the outside of the tower (1) below the platform plate (201); the guide rail assembly (3) is fixedly connected to the support assembly (203); and a rack structure (303) is provided on the periphery of the guide rail assembly (3); It also includes a plurality of clamping drive devices (4), the number of the clamping drive devices (4) being greater than or equal to five and being evenly distributed on the guide rail assembly (3), the number of spiral turns of the guide rail assembly (3) being at least one, and the structure of a single clamping drive device (4) being: It comprises a driving frame (43), a driving motor (42) is mounted on one side of the driving frame (43), and a gear (41) meshing with the rack structure (303) is mounted on the output end of the driving motor (42). A guide wheel assembly (46) is mounted on the driving frame (43) and is matched with the guide rail assembly (3). The guide wheel assembly (46) is used to limit the relative position of the driving frame (43) and the guide rail assembly (3), so that the gear (41) can move along the spiral direction of the guide rail assembly (3) while being engaged with the rack structure (303); A transverse movement mechanism (44) is also installed on the driving frame (43), one end of the transverse movement mechanism (44) is connected to the driving frame (43), and the other end of the transverse movement mechanism (44) is installed with a bearing block (45), the bearing block (45) cooperates with the outer side surface of the tower (1), and the transverse movement mechanism (44) drives the bearing block (45) to be close to or away from the outer side surface of the tower (1); A plurality of bearing blocks (45) simultaneously cling to the outer side surface of the tower (1) so that the clamping drive device (4) carries the guide rail assembly (3), thereby enabling the guide rail assembly (3) to support the platform assembly (2); The driving motors (42) corresponding to the plurality of bearing blocks (45) close to the tower (1) are turned on, and the guide rail assembly (3) rotates relative to the tower (1) under the drive of the gear (41), thereby achieving the lifting and lowering of the platform assembly (2); The structure of the transverse movement mechanism (44) is: It comprises a transverse motor (4401) and a sliding frame (4402), wherein the transverse motor (4401) and the sliding frame (4402) are both fixedly mounted on the driving frame (43), and the sliding frame (4402) is located on one side of the output end of the transverse motor (4401); A threaded rod (4407) is installed at the output end of the transverse motor (4401), and a special-shaped nut (4406) is slidably installed on the sliding frame (4402). The special-shaped nut (4406) is provided with a threaded hole that cooperates with the threaded rod (4407). The threaded rod (4407) rotates under the drive of the transverse motor (4401), thereby driving the special-shaped nut (4406) to move forward and backward along the axis of the threaded hole relative to the sliding frame (4402); It also includes a push rod (4403), one end of which is mounted on the bearing block (45), and the other end of which is connected to the special-shaped nut (4406) via a pressure sensor (4405), and the axial direction of the push rod (4403) is consistent with the axial direction of the threaded hole; The guide rail assembly (3) has a structure comprising a plurality of segmented spiral plates (301) connected end to end, wherein the connection points of adjacent segmented spiral plates (301) are connected via a connecting block (302), the rack structure (303) is provided on the outer periphery of the segmented spiral plates (301), and the inner periphery of the segmented spiral plates (301) is provided with a stop bar (304) perpendicular to the segmented spiral plates (301), the length direction of the stop bar (304) is consistent with the spiral direction of the guide rail assembly (3), and the stop bar (304) and the segmented spiral plates (301) are simultaneously matched with the guide wheel assembly (46).

2. The wind turbine tower platform lifting device according to claim 1, characterized in that: The structure of the sliding frame (4402) is as follows: comprising a first sliding portion (44021), a first sliding hole (44024) being provided on the first sliding portion (44021), and a guide portion (44022) being provided on one side of the first sliding portion (44021) at intervals and in parallel; The structure of the special-shaped nut (4406) is as follows: it includes a columnar body (44061), the threaded hole is arranged inside one end of the columnar body (44061), the outer periphery of the columnar body (44061) is slidably matched with the first sliding hole (44024), the other end of the columnar body (44061) is a connecting portion (44063), the connecting portion (44063) is connected to the pressure sensor (4405), and a guide plate (44062) is arranged in the middle of the columnar body (44061), and the two sides of the guide plate (44062) are respectively matched with the two guide portions (44022).

3. A wind turbine tower platform lifting device according to any one of claims 1-2, characterized in that: One end of the top rod (4403) is provided with an electromagnet (4404) that cooperates with the bearing block (45). When the electromagnet (4404) is in operation, it presses the bearing block (45) onto the tower (1).

4. The wind turbine tower platform lifting device according to claim 1, characterized in that: The gear (41) is located on the lower surface of the driving frame (43); The guide wheel assembly (46) has the following structure: it includes a roller frame (4605), the roller frame (4605) is arranged on the lower surface of the drive frame (43) opposite to the gear (41), and also includes an upper roller (4601) rotatably mounted on the lower surface of the drive frame (43) and a lower roller (4602) mounted on the roller frame (4605), the upper roller (4601) cooperates with the upper surface of the segmented spiral plate (301), and the lower roller (4602) cooperates with the lower surface of the segmented spiral plate (301), and the roller frame (4605) is further mounted with an inner roller (4604) and an outer roller (4603), the inner roller (4604) cooperates with the inner ring of the stop bar (304), and the outer roller (4603) cooperates with the lower part of the outer ring of the stop bar (304).

5. The wind turbine tower platform lifting device according to claim 1, characterized in that: In one spiral turn of the guide rail assembly (3), the number of the segmented spiral plates (301) is greater than or equal to three.

6. A lifting method using the wind turbine tower platform lifting device according to claim 1, characterized in that: The following steps are involved: S1: Adjust the initial position of the platform assembly (2), and make all the clamping drive devices (4) evenly distributed on the guide rail assembly (3), start the transverse movement mechanism (44) of all the clamping drive devices (4), and make the bearing block (45) close to the outer side surface of the tower (1); S2: Keeping the bearing block (45) of the first clamping drive device (4) on the starting side of the predetermined moving direction of the platform assembly (2) away from the tower (1); S3: starting the driving motor (42) of the first clamping drive device (4), so that the first clamping drive device (4) moves along a spiral direction consistent with the predetermined moving direction of the platform assembly (2) to a side of the clamping drive device (4) adjacent to the first clamping drive device (4), S4: starting the transverse movement mechanism (44) of the first clamping drive device (4) to drive the bearing block (45) to be close to the outer side surface of the tower (1); S5: repeat the action of the first clamping drive device (4) in S2-S4 with the clamping drive device (4) adjacent to the first clamping drive device (4), and then complete the action of S2-S4 with all the clamping drive devices (4) in sequence; S6: Keep the bearing blocks (45) of all the clamping drive devices (4) close to the outer side surface of the tower (1); start the drive motors (42) on all the clamping drive devices (4), and drive the guide rail assembly (3) to move along the predetermined moving direction of the platform assembly (2) through the rotation of the gear (41), thereby driving the platform assembly (2) to move; S7: Repeat S2-S6 to gradually move the platform assembly (2) to a predetermined position.

7. The lifting method according to claim 6, wherein: In step S2, while ensuring that the lifting device can be securely fixed on the tower (1), one or more other bearing blocks (45) are kept separated from the tower (1); The clamping drive device (4) corresponding to the bearing block (45) of the detached tower (1) in step S2 and its adjacent clamping drive device (4) all repeat the actions of the first clamping drive device (4) and its adjacent clamping drive device (4) in S2-S5.

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