Safety auxiliary device for tower drum of wind turbine generator

Abstract

The invention belongs to the technical field of auxiliary devices, and provides a wind turbine generator tower safety auxiliary device which comprises a plurality of storage discs and a fixing device, the fixing device is installed in a tower, and the upper end of the fixing device is connected with the tower top of the tower; the multiple storage discs are sequentially installed on the outer surface of the fixing device in the axial direction of the tower drum. An anti-falling net is installed on the upper surface of the storage disc, and a storage lead arranged on the edge of the anti-falling net is connected with a traction motor arranged on the inner wall of the tower barrel. When a person falls, the traction motor drives the anti-falling net to rapidly open, so that the falling person is intercepted, and the life safety of the falling person is protected; at ordinary times, the anti-falling nets are contracted in the storage disc, so that the anti-falling nets are prevented from being wound, and maintainers can climb conveniently.

Description

Technical Field

[0001] This invention belongs to the field of auxiliary device technology, and specifically relates to a safety auxiliary device for wind turbine towers. Background Technology

[0002] With the increasing global demand for renewable energy, wind power, as an important component of clean energy, has experienced rapid development. During the construction and operation of wind farms, the tower, as a key structure supporting the wind turbine generators, often reaches heights of tens or even hundreds of meters, making maintenance work inside the tower a crucial aspect of high-altitude operations. Tower maintenance involves high-risk aspects such as climbing tall towers and operating in confined spaces. Maintenance personnel may face safety risks such as exhaustion and falls during operations. Furthermore, where there is a certain distance between the end of the tower ladder and the platform surface, maintenance personnel are highly susceptible to falls during the transfer from the ladder to the platform. Therefore, in addition to strengthening training and standardized operation for maintenance personnel, a safety auxiliary device is needed to ensure the safety of maintenance personnel in the event of an accidental fall.

[0003] Existing technologies, such as the offshore wind turbine tower safety fall prevention system disclosed in CN118615609A, relate to the field of climbing fall prevention equipment technology, specifically an offshore wind turbine tower safety fall prevention system. This system includes a ladder with a guide rail fixed in the middle. A safety slider is slidably engaged inside the guide rail. The safety slider includes a carrier plate, one end of which is rotatably connected to a shaped locking block. A rope is inserted through the top of the shaped locking block, and hand fall protection devices are fixed to both ends of the rope. In this invention, a guide rail is fixed to the ladder, and a safety slider is slidably engaged on the guide rail. The safety slider is connected to the user's waist fall protection via a safety belt. The user wears gloves with hand fall protection devices. During climbing, the user uses both hands to support the ladder, causing the rope on the gloves to tension and rotate the shaped locking block on the safety slider. The rotation of the shaped locking block prevents its bottom from engaging with the rectangular hole in the guide rail, allowing the safety slider to move synchronously up and down while preventing the user from falling.

[0004] The aforementioned existing technology uses a safety belt to ensure the user is connected to the guide rail, thereby preventing falls. However, the safety belt may sometimes fail, which can easily cause injury to maintenance personnel or even endanger their lives. Therefore, a safety auxiliary device is needed to assist in ensuring the safety of workers in the event of a safety belt failure. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a safety auxiliary device for wind turbine towers, comprising several storage trays and a fixing device. The fixing device is installed inside the tower, and its upper end is connected to the top of the tower. The several storage trays are sequentially installed on the outer surface of the fixing device along the axial direction of the tower. A fall protection net is installed on the upper surface of the storage trays, and the storage lead wires set at the edge of the fall protection net are connected to a traction motor installed on the inner wall of the tower.

[0006] Furthermore, a traction pulley is provided on the inner wall of the tower. The traction pulley is located on the side of the traction motor away from the ground. The end of the take-up lead away from the fall protection net passes through the traction pulley and is fixedly connected to the winding wheel on the traction motor.

[0007] Furthermore, the fixing device includes a fixing ring and a friction rod, the upper end of the friction rod is fixedly connected to the fixing ring, and the fixing ring is connected to the top of the tower; a storage tray is installed on the friction rod.

[0008] Furthermore, a sliding sleeve is slidably mounted on the friction rod, and a damping structure is provided between the friction rod and the sliding sleeve. The lower surface of the sliding sleeve is fixedly connected to the storage tray.

[0009] Furthermore, the damping structure includes a friction wheel, a fixed plate, and a rotating shaft. A rotating shaft is provided between two adjacent fixed plates, and a friction wheel is rotatably mounted on the rotating shaft. The friction wheel is in contact with the friction rod.

[0010] Furthermore, a plurality of damping blocks are provided on the outer surface of the friction rod, and the damping blocks are in contact with the friction wheel.

[0011] Furthermore, the sliding sleeve is a regular hexagonal prism.

[0012] Furthermore, a magnetic suction box is provided on the outer surface of the sliding sleeve.

[0013] Furthermore, a steel ball is provided between the fall protection net and the lead wire, and the steel ball is magnetically attracted in the magnetic box.

[0014] Furthermore, the wind turbine tower safety auxiliary device also includes a control system, which is installed on the inner wall of the tower and is electrically connected to the traction motor.

[0015] Beneficial effects 1. The wind turbine tower safety auxiliary device of the present invention includes a storage tray and a fixing device. The storage trays of each level are connected in series and installed on the fixing device suspended in the center of the tower. A fall protection net is installed on the upper surface of the storage tray. The storage lead wire set at the edge of the fall protection net is connected to the traction motor set in the inner wall of the tower. When a person falls and the safety belt fails, this safety auxiliary device drives the fall protection net to open quickly through the traction motor, thereby intercepting the falling person and protecting the life safety of the falling person. Normally, the fall protection net is retracted in the storage tray to prevent the fall protection net from getting tangled and to facilitate maintenance personnel to climb.

[0016] 2. The wind turbine tower safety auxiliary device of the present invention includes a fixing device, which includes a fixing ring and a friction rod. The upper end of the friction rod is fixedly connected to the fixing ring, and the fixing ring is connected to the top of the tower. A storage tray is installed on the friction rod. The storage tray is fixed by being installed on the friction rod. At the same time, the storage tray is located in the middle of the tower, thereby realizing the uniform expansion of the fall protection net in all directions. This allows people falling from all directions to be intercepted by the fall protection net, increasing the interception area and achieving large-area, high-efficiency interception.

[0017] 3. In the wind turbine tower safety auxiliary device of the present invention, a sliding sleeve is slidably installed on the friction rod, and a damping structure is provided between the friction rod and the sliding sleeve. The lower surface of the sliding sleeve is fixedly connected to the receiving plate. By setting the damping structure, the falling personnel are intercepted and slowly descended, improving safety. At the same time, the sliding sleeve is slidably installed on the friction rod, which provides a buffering effect for the person when falling, preventing the rope from being unbuffered when subjected to the person's weight, thus preventing secondary injury and improving personnel safety.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A partial cross-sectional schematic diagram of the wind turbine tower safety auxiliary device in an embodiment of the present invention is shown.

[0021] Figure 2The diagram shows a top-view cross-sectional view of the anti-fall net of the wind turbine tower safety auxiliary device in an embodiment of the present invention after it has been opened.

[0022] Figure 3 The diagram shows a top cross-sectional view of the wind turbine tower safety auxiliary device after the fall protection net is closed, according to an embodiment of the present invention.

[0023] Figure 4 A schematic diagram of the fixing device of the wind turbine tower safety auxiliary device in an embodiment of the present invention is shown.

[0024] Figure 5 A top view schematic diagram of the fixing device of the wind turbine tower safety auxiliary device in an embodiment of the present invention is shown.

[0025] In the diagram, 10 is the tower section; 11 is the mounting slot. 20. Fall protection net; 21. Cable management device; 30. Storage tray; 41. Traction motor; 42. Traction pulley; 50. Fixing device; 51. Fixing ring; 52. Sliding sleeve; 53. Friction rod; 531. Damping block; 54. Friction wheel; 55. Fixing plate; 56. Magnetic box; 57. Rotating shaft; 60. Steel balls. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1, refer to Figure 1A wind turbine tower safety auxiliary device includes several storage trays 30 and a fixing device 50. The fixing device 50 is installed inside the tower 10, and its upper end is connected to the top of the tower 10. Several storage trays 30 are sequentially installed on the outer surface of the fixing device 50 along the axial direction of the tower 10 (i.e., several storage trays 30 are sequentially fixed on the fixing device 50 at equal intervals, with holes in the middle of the storage trays 30, and the fixing device 50 passes through the holes in the middle of the storage trays 30). Each level of storage trays 30 is connected in series on the fixing device 50 suspended in the center of the tower 10. The uppermost part of the fixing device 50 is fixed to the uppermost part of the tower 10 by a fixing ring 51. The fixing device 50 is located inside the tower 10. A fall protection net 20 is installed on the upper surface of the storage trays 30, and the storage lead wire 21 set at the edge of the fall protection net 20 is connected to the traction motor 41 set on the inner wall of the tower 10. When a person falls, the traction motor 41 drives the fall protection net 20 to open, thereby intercepting the falling person and protecting their life. Normally, the fall protection net 20 is retracted into the storage tray 30 to prevent adjacent fall protection nets 20 from getting tangled and to facilitate maintenance personnel climbing.

[0028] Specifically, the wind turbine tower safety auxiliary device is installed inside the tower 10. The wind turbine tower safety auxiliary device includes: a multi-stage fall arrest net 20, a multi-stage storage tray 30, a mechanical opening / closing / locking system for the multi-stage fall arrest net 20 (i.e., a traction motor 41 and a traction pulley 42), a wearable human acceleration detection device, and a control system. When a maintenance worker wearing the human acceleration detection device is performing maintenance inside the wind turbine tower, if he accidentally falls from a height, the human acceleration detection device sends a signal to the control system. The control system then controls the traction motor 41 to work and activate the fall arrest net 20, thereby intercepting the falling maintenance worker and providing safety assistance to the worker, thus improving the interception efficiency.

[0029] Another implementation is as follows: the various levels of storage trays 30 are connected in series on the iron cable (i.e., the iron cable replaces the friction rod 53) suspended in the center of the tower 10, and the uppermost part of the iron cable is fixed to the uppermost part of the wind turbine tower by a suspension hook.

[0030] refer to Figure 1 The inner wall of the tower 10 is provided with a traction pulley 42, which is located on the side of the traction motor 41 away from the ground. The end of the lead wire 21 away from the fall protection net 20 passes through the traction pulley 42 and is fixedly connected to the winding wheel on the traction motor 41.

[0031] Furthermore, the auxiliary device installs a set of fall protection nets 20 and a mechanical opening / closing system (traction motor 41 and traction pulley 42) every 3-5 meters inside the tower 10. Each set of fall protection net mechanical opening / closing system includes six traction motors 41 and six traction pulleys 42. The six traction motors 41 are all installed in six mounting slots 11 on the inner wall of the tower 10 at the same level. The six traction pulleys 42 are located above the six traction motors 41 and are used to guide the take-up lead 21 to prevent the take-up lead 21 from rubbing against the edge of the tower 10, thereby reducing the service life of the take-up lead 21 and preventing the breakage of the take-up lead 21.

[0032] Furthermore, each level of the fall arresting net 20's mechanical tensioning / locking system includes 6 traction motors 41, 6 sets of fixed traction pulleys 42, and 6 take-up leads 21. One end of the take-up lead 21 is connected to one corner of the fall arresting net 20 via a steel ball 60, and the other end passes around the traction pulley 42 and is bound to the winding wheel on the motor shaft of the traction motor 41.

[0033] refer to Figure 4 The fixing device 50 includes a fixing ring 51 and a friction rod 53. The upper end of the friction rod 53 is fixedly connected to the fixing ring 51, and the fixing ring 51 is connected to the top of the tower 10. A storage tray 30 is installed on the friction rod 53. Specifically, the storage tray 30 is fixed by being installed on the friction rod 53. At the same time, the storage tray 30 is located in the middle of the tower 10, thereby enabling the fall protection net 20 to spread evenly in all directions. This allows people from all directions to be intercepted by the fall protection net 20, increasing the interception area and achieving efficient large-area interception.

[0034] refer to Figure 5 A sliding sleeve 52 is slidably mounted on the friction rod 53, and a damping structure is provided between the friction rod 53 and the sliding sleeve 52. The lower surface of the sliding sleeve 52 is fixedly connected to the receiving tray 30. By setting up the damping structure, the falling person is intercepted and a slow descent is achieved, improving safety. At the same time, the sliding sleeve 52 is slidably mounted on the friction rod 53, which provides a cushioning effect when a person falls, preventing the rope from being unbuffered when subjected to the person's weight and causing secondary injury, thus improving safety.

[0035] refer to Figure 5 The damping structure includes a friction wheel 54, a fixed plate 55, and a rotating shaft 57. A rotating shaft 57 is disposed between two adjacent fixed plates 55, and a friction wheel 54 is rotatably mounted on the rotating shaft 57. The friction wheel 54 contacts the friction rod 53. Specifically, the outer surface of the friction rod 53 is covered with rubber. The contact between the friction wheel 54 and the friction rod 53 generates a large frictional force, thus achieving a buffering effect and improving safety.

[0036] Specifically, a plurality of damping blocks 531 are provided on the outer surface of the friction rod 53, and the damping blocks 531 are in contact with the friction wheel 54. The damping blocks 531 are used to increase the friction force, thereby improving safety.

[0037] In another alternative implementation, the outer surface of the friction rod 53 is provided with a groove, and the outer surface of the friction wheel 54 is provided with a protrusion. The groove and the protrusion cooperate to increase the friction. When a person makes instantaneous contact with the fall arrest net 20, the weight of the falling person overcomes the friction between the friction wheel 54 and the friction rod 53. The storage tray 30 and the sliding sleeve 52 will move downwards accordingly. However, multiple sets of fall arrest nets 20 (i.e., multiple sets of sliding sleeves 52) are installed on the fall arrest friction rod 53, which will gradually provide friction during the descent until the descent stops in the direction of gravity.

[0038] refer to Figure 5 The outer surface of the sliding sleeve 52 is provided with a magnetic box 56. When the fall protection net 20 is retracted, the steel balls 60 on the fall protection net 20 are attracted into the magnetic box 56 by the attraction force generated by the magnet in the magnetic box 56, thereby fixing the fall protection net 20.

[0039] Furthermore, the sliding sleeve 52 is a regular hexagonal prism. To ensure the structural strength of the fall arrest net 20 after it is opened, each stage is equipped with 6 traction motors 41. By distributing them, the load-bearing capacity of the lead wires 21 at each end of the traction motors 41 is reduced, ensuring that the structure can withstand the weight and impact of the person falling.

[0040] Specifically, steel balls 60 are installed between the fall arrest net 20 and the receiving lead 21. The six ends of the fall arrest net 20 connected to the traction motor 41 are equipped with steel balls 60. The functions of the steel balls 60 include: ① automatically allowing each level of the fall arrest net 20 to fall back into its respective receiving tray 30 when tensioning is not required; ② limiting the tension of the fall arrest net 20 by the traction motor 41, preventing excessive tension under motor control.

[0041] In a specific embodiment, the wind turbine tower safety auxiliary device also includes a control system, which is installed on the inner wall of the tower 10 and is electrically connected to the traction motor 41.

[0042] Furthermore, the work clothes worn by maintenance personnel are equipped with human acceleration detection devices. When the downward acceleration of a person reaches the acceleration due to gravity, the human acceleration detection device sends a signal to the control system. The control system triggers the traction motor 41 to work, which drives the take-up lead 21 and in turn drives the fall protection net 20 to open.

[0043] Working principle: This system requires maintenance personnel to wear a human acceleration detection device to function. This device can detect the personnel's current vertical acceleration in real time and send the acceleration information to the control system. When the detected vertical acceleration reaches the local gravitational acceleration, the control system sends a control signal to activate the traction motors 41 at each stage. The traction motors 41 rotate and pull the storage lead 21 to pull the steel ball 60 out of the magnetic box 56, overcoming the magnetic attraction of the magnet, thereby unfolding the fall protection net 20 (as shown). Figure 2 As shown in the diagram, when a falling person comes into contact with the first unfolded fall arrest net 20, the fall arrest net 20, under the action of the person's weight, causes the storage tray 30 and the sliding sleeve 52 to move downwards. At this time, the friction wheel 54 and the friction rod 53 generate friction, thereby mitigating the impact force of the falling person's fall. Then, the next layer of fall arrest net 20 comes into contact with the falling person, and the next layer of fall arrest net 20 continues to mitigate the person's fall through the friction force generated by the friction wheel 54 and the friction rod 53. Multiple fall arrest nets 20 are used in sequence to intercept falling persons, improving the interception effect and the safety of the interception.

[0044] Example 2, refer to Figure 3 To avoid affecting the operation of the climbing device inside the tower 10, this patent also optimizes the interference resistance of the device structure. To ensure the normal operation of the climbing device inside the tower 10 and to guarantee the normal boarding work of maintenance personnel, when no human fall acceleration is detected, each level of the fall arrest net 20 remains in a retracted state. Each level of the fall arrest net 20 is stored in its respective storage tray 30 to prevent the fall arrest net 20 from falling naturally due to gravity, causing the parts to become entangled and affecting subsequent opening operations. The storage tray 30 adopts a grid-like opening and closing structure, remaining open under normal circumstances and retracting inward in emergencies to prevent collisions during personnel fall.

[0045] Furthermore, a fixing device 50 is installed in the center of the tower 10, and storage trays 30 of each level are connected in series on the friction rod 53. A storage device is set in the center of the storage tray 30. Through magnetic attraction, the steel ball 60 is attracted into the magnetic box 56 of the sliding sleeve 52 to realize the storage of the fall protection net 20.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A safety auxiliary device for wind turbine towers, characterized in that, It includes several storage trays (30) and a fixing device (50). The fixing device (50) is installed inside the tower (10), and the upper end of the fixing device (50) is connected to the top of the tower (10). The several storage trays (30) are installed sequentially on the outer surface of the fixing device (50) along the axial direction of the tower (10). A fall protection net (20) is installed on the upper surface of the storage tray (30), and the storage lead wire (21) set at the edge of the fall protection net (20) is connected to the traction motor (41) set on the inner wall of the tower (10).

2. The wind turbine tower safety auxiliary device according to claim 1, characterized in that, The inner wall of the tower (10) is provided with a traction pulley (42), which is located on the side of the traction motor (41) away from the ground. The end of the take-up lead (21) away from the fall protection net (20) passes through the traction pulley (42) and is fixedly connected to the winding wheel on the traction motor (41).

3. The wind turbine tower safety auxiliary device according to claim 1, characterized in that, The fixing device (50) includes a fixing ring (51) and a friction rod (53). The upper end of the friction rod (53) is fixedly connected to the fixing ring (51), and the fixing ring (51) is connected to the top of the tower (10). A storage tray (30) is installed on the friction rod (53).

4. A wind turbine tower safety auxiliary device according to claim 3, characterized in that, A sliding sleeve (52) is slidably mounted on the friction rod (53), and a damping structure is provided between the friction rod (53) and the sliding sleeve (52). The lower surface of the sliding sleeve (52) is fixedly connected to the storage tray (30).

5. A wind turbine tower safety auxiliary device according to claim 4, characterized in that, The damping structure includes a friction wheel (54), a fixed plate (55), and a rotating shaft (57). A rotating shaft (57) is provided between two adjacent fixed plates (55). The friction wheel (54) is rotatably mounted on the rotating shaft (57), and the friction wheel (54) is in contact with the friction rod (53).

6. A wind turbine tower safety auxiliary device according to claim 5, characterized in that, The outer surface of the friction rod (53) is provided with a plurality of damping blocks (531), and the damping blocks (531) are in contact with the friction wheel (54).

7. A wind turbine tower safety auxiliary device according to claim 4, characterized in that, The sliding sleeve (52) is a regular hexagonal prism.

8. A wind turbine tower safety auxiliary device according to claim 7, characterized in that, A magnetic box (56) is provided on the outer surface of the sliding sleeve (52).

9. A wind turbine tower safety auxiliary device according to claim 7, characterized in that, A steel ball (60) is provided between the fall protection net (20) and the lead wire (21), and the steel ball (60) is magnetically attracted in the magnetic box (56).

10. A wind turbine tower safety auxiliary device according to any one of claims 1-9, characterized in that, The wind turbine tower safety auxiliary device also includes a control system, which is installed on the inner wall of the tower (10) and is electrically connected to the traction motor (41).

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