Safety pedal for enabling fan to go out of cabin

Abstract

The utility model discloses a fan out-of-cabin safety pedal which comprises a pedal body and two auxiliary plates, the pedal body and the two auxiliary plates are installed on two out-of-cabin handrails, the two auxiliary plates are vertically connected to the two sides of the bottom of the pedal body respectively, and the distance between the two auxiliary plates corresponds to the width of the out-of-cabin handrails. The bottom of the pedal body is provided with a first clamping groove connected with a handrail outside the cabin in a clamped mode. According to the utility model, the pedal main body is arranged on the two out-of-cabin handrails, and the two auxiliary plates and the first clamping grooves are used for limiting the pedal main body in two directions respectively, so that a safe and reliable maintenance platform is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of pedals of wind turbines, and more specifically, to a safety pedal for getting out of the nacelle of a wind turbine. Background Art

[0002] The nacelle of a wind turbine is the core part of the wind turbine generator set and undertakes the important task of converting wind energy into electrical energy. It has sealing and protection properties to protect the internal components from the external environment. The nacelle of a wind turbine usually has good sealing and protection performance. It can effectively isolate the entry of sand, dust, rain, snow and other harmful substances to ensure the normal operation and long-term use of the equipment inside the nacelle. At the same time, it has temperature and humidity control. Since the nacelle is located in a key part of the wind turbine generator set, the temperature and humidity control of the internal equipment is crucial. According to its functional and layout requirements, key equipment of the wind turbine generator set, including generators, gearboxes, frequency converters, control systems, etc., are installed inside the nacelle. These equipment need to be reasonably arranged to ensure the space utilization rate and operation efficiency inside the nacelle.

[0003] In the daily work of a wind turbine, due to limited working space and special operating environment, some work contents are relatively dangerous. For example, work on the wind turbine such as repairing and replacing wind vanes, anemometers, and aviation lights requires getting out of the nacelle. The usual working method is to step on the smooth, round and narrow handrail of the generator switch cabinet platform with both feet and then rely on double hooks to hang on the handrail to ensure safety. During long-term maintenance, the supporting points of the feet are narrow and easy to become weak and slippery, posing certain safety hazards.

[0004] The prior art CN218581746U, a safety platform for overhauling the nacelle of a wind turbine generator set, includes a cantilever bracket welded with channel steel. The cantilever bracket is fixed in an L shape at the existing installation holes of the original platform at the tail of the nacelle. A pedal is bolted and installed on the cantilever bracket, and a support beam is fixedly installed on the cantilever bracket. The structure of the support beam is welded with channel steel, mainly playing the role of fixing the cantilever bracket. After all are fixed, the entire platform becomes an integral whole. This technical solution combines actual installation in theoretical design and has fully considered various aspects such as connection with the original frame, including support of various parts, structural strength, and working convenience, etc., fully meeting the development of daily inspection and maintenance work, and can effectively avoid accidental situations and reduce the probability of safety accidents, meeting the functions of load-bearing and protecting the bottom plate of the nacelle cover. However, this technical solution cannot meet the usage scenarios during out-of-nacelle maintenance. Content of the Utility Model

[0005] To solve the above problems, the present utility model proposes a safety pedal for a fan to exit the cabin. When maintenance personnel exit the cabin for maintenance, the maintenance personnel install the pedal on the external handrail of the cabin. Through the limit of the auxiliary plate and the first card slot, the pedal is ensured to be firmly installed, providing a safe maintenance platform for the maintenance personnel.

[0006] To achieve the above object, a safety pedal for a fan to exit the cabin in the present technical solution includes a pedal main body installed on two external handrails of the cabin and two auxiliary plates. The two auxiliary plates are respectively vertically connected to both sides of the bottom of the pedal main body. The distance between the two auxiliary plates corresponds to the width of each external handrail of the cabin. A first card slot for clamping with the external handrail of the cabin is provided at the bottom of the pedal main body.

[0007] In the present technical solution, after the maintenance personnel exit the cabin, they place the pedal main body flat on the two external handrails of the cabin. The auxiliary plates located on both sides of the pedal main body respectively abut against both ends of each external handrail of the cabin. The first card slot at the bottom of the pedal main body is clamped on the handrail. Among them, the auxiliary plate is used to limit the lateral displacement of the pedal main body, and the first card slot is used to limit the longitudinal displacement of the pedal main body. This pedal provides a safe maintenance platform for the maintenance personnel, making the standing area of the maintenance personnel larger and the support points more reliable, avoiding the situation that the maintenance personnel's feet are weak and slippery, and eliminating potential safety hazards.

[0008] As a preferred solution, at least one cross beam is fixedly connected to the bottom of the pedal main body. The first card slot is vertically provided on the cross beam. Both ends of the cross beam abut against the two external handrails of the cabin. The cross beam has the function of strengthening the bearing capacity of the pedal main body.

[0009] As a preferred solution, a second card slot for clamping with the external handrail of the cabin is provided on the cross beam. The notch of the second card slot is inclined towards the middle of the cross beam. The distance between the bottoms of the first card slot and the second card slot is equal to the distance between the two external handrails of the cabin. Through the second card slot, the pedal can be vertically hung on one of the external handrails of the cabin. And because the second card slot is of an inclined structure, the pedal will not come out when it is hung. When the pedal needs to be used, first clamp its second card slot on one of the external handrails of the cabin, and then flip the pedal with this external handrail as the axis until the first card slot is clamped on the other external handrail. Thus, the installation of the pedal is completed.

[0010] As a preferred solution, in order to further strengthen the bearing capacity of the pedal, two cross beams are respectively fixedly connected to both sides of the bottom of the pedal main body. The first card slot and the second card slot are respectively provided on both sides of each cross beam. The setting of the second card slot can facilitate the switching of the pedal between the "use" state and the "storage" state.

[0011] As a preferred solution, in order to facilitate the maintenance personnel to carry, hanging holes are provided on the auxiliary plate. The maintenance personnel carry the pedal on their backs by threading a rope through the hanging holes, and then ride on the non-climbing device to rise from the ground to the engine room.

[0012] As a preferred solution, in order to prevent the soles of maintenance personnel from slipping, the surface of the pedal body is provided with anti-slip stripes.

[0013] As a preferred solution, in order to facilitate the maintenance personnel to hook the safety rope on the handrail outside the cabin, a notch for exposing a part of the handrail outside the cabin is provided on one side of the pedal body. The notch is of a U-shaped structure, and an anti-slip pad is fixed on the edge of the notch. During the maintenance operation, the maintenance personnel first install the pedal on the handrail outside the cabin, and then pass the safety rope through the notch and hook it on the exposed part of the handrail outside the cabin.

[0014] As a preferred solution, the pedal body is composed of two identical left and right panels. One ends of the two panels are hinged so that the pedal body can be folded in half along its hinge to reduce the floor area occupied by the pedal for easy storage.

[0015] As a preferred solution, in order to prevent the corners of the pedal from rubbing against the wind turbine generator and causing damage, rounded corners are respectively provided at both ends of the bottom of each sub-board. As a preferred solution, the pedal body and each sub-board are made of the same material, which is aluminum alloy or fiber-reinforced plastic.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. After the pedal of the present utility model is installed, the two sub-boards abut against both ends of the handrail outside the cabin to limit the lateral displacement of the pedal body, and then are clamped on the handrail outside the cabin through the first card slots to limit the longitudinal displacement of the pedal body, avoiding the front-back sliding of the pedal, and being convenient for disassembly and assembly, providing a safe maintenance platform for maintenance personnel.

[0018] 2. By installing the pedal on the handrail outside the cabin, the stepping area of the maintenance personnel can be increased, ensuring the safety of the maintenance personnel during operation. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural view of the safety pedal for exiting the cabin of the wind turbine generator of the present utility model;

[0020] Figure 2 is a schematic structural view of the safety pedal for exiting the cabin of the wind turbine generator during use;

[0021] Figure 3 is a schematic structural view of the safety pedal for exiting the cabin of the wind turbine generator during storage;

[0022] Figure 4 is a schematic structural view of the folded state of the pedal body in Embodiment 4;

[0023] Figure 5 is a schematic structural view of Embodiment 5;

[0024] Figure 6 It is a schematic structural diagram of the folding state of the secondary board in Embodiment 5;

[0025] In the figure: pedal main body 1; panel 11; first limit hinge 12; notch 13; secondary board 2; hanging hole 21; second limit hinge 22; cross beam 3; first card slot 31; second card slot 32; out-of-cabin handrail 4. Specific embodiments

[0026] The attached drawings are only for illustrative purposes and should not be construed as a limitation of this patent; to better illustrate this embodiment, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted. The positional relationships described in the attached drawings are only for illustrative purposes and should not be construed as a limitation of this patent.

[0027] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationships in the attached drawings are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] The technical solutions of the present utility model will be further specifically described below through specific embodiments and in conjunction with the attached drawings:

[0029] Embodiment 1:

[0030] As Figures 1 to 4 shown, this embodiment provides a safety pedal for a fan to exit the cabin, including a pedal main body 1 installed on two out-of-cabin handrails 4 and two secondary boards 2. The two secondary boards 2 are respectively vertically connected to both sides of the bottom of the pedal main body 1. The distance between the two secondary boards 2 corresponds to the width of each out-of-cabin handrail 4. A first card slot 31 for clamping with the out-of-cabin handrail 4 is provided at the bottom of the pedal main body 1.

[0031] In this embodiment, the pedal body 1 and the two secondary plates 2 are of an integrally formed structure. It is formed by thermally bending both sides of a sheet to form a U-shaped structure, which has many advantages, such as better seismic resistance performance, capable of providing better structural stability; structural reliability, ensuring the safety and durability of the pedal; high efficiency and cost savings: less consumables, simple processing, reducing production costs, and at the same time being easy to maintain and transform. The two sides of the U-shaped structure are bent to form the secondary plates 2, and the secondary plates 2 and the pedal body 1 form an arc transition due to the thermoforming process. This arc surface can not only avoid sharp corner collisions but also better fit the bent part of the out-of-cabin handrail 4.

[0032] In this embodiment, the width and length of the pedal body 1 are both 53 cm, the length of the secondary plate is 53 cm, and the width is 13 cm. This safety pedal for wind turbine out-of-cabin is applicable to Goldwind 1.5 MW units.

[0033] Specifically, the surface of the pedal body 1 is provided with anti-slip stripes.

[0034] In this embodiment, the anti-slip stripes are formed by stamping process. In addition to the anti-slip stripes, there are also anti-slip protrusions on the pedal body 1, also for increasing the anti-slip performance of the pedal body 1 and improving the use safety. These anti-slip protrusions usually adopt different shapes and materials to adapt to different use environments and requirements. For example, designs such as alligator mouth type, raised herringbone type, raised cross type, etc. These protrusions not only increase the friction coefficient on the surface of the pedal body 1, enabling the feet or wheels to better fix their positions when in contact with the pedal and reducing sliding, thereby improving safety and stability. In addition, these designs can also effectively drain water and prevent the risk of slipping caused by water accumulation.

[0035] Specifically, two cross beams 3 are fixedly connected to the bottom of the pedal body 1, and two vertical first card slots 31 are respectively provided at both ends of the bottom of each cross beam 3.

[0036] In this embodiment, the two cross beams 3 are respectively close to the left and right secondary plates 2. The two cross beams 3 can be welded to the bottom of the pedal body 1 or can be detachably installed at the bottom of the pedal body 1 by bolts. By replacing the cross beams 3 at different first card slot 31 positions, it can be adapted to the out-of-cabin handrails of multiple units, with strong compatibility.

[0037] Specifically, hanging holes 21 are provided on the secondary plates 2.

[0038] In this embodiment, maintenance personnel tie the rope to the hanging holes 21 for easy carrying of the pedal. Then, the maintenance personnel carry the pedal from the ground to the nacelle through a non-climbing device.

[0039] Specifically, rounded corners are respectively provided at both ends of the bottom of each secondary plate 2.

[0040] In this embodiment, since the secondary plate 2 has sharp corners after hot bending forming, it will pose potential safety hazards to maintenance personnel and may also scratch the cabin, causing losses. By grinding and processing the sharp corners into rounded corners, the safety hazards can be eliminated to a greater extent.

[0041] Specifically, the pedal body 1 and each secondary plate 2 are made of the same material, which is aluminum alloy or fiber-reinforced plastic.

[0042] In this embodiment, due to the high strength of aluminum alloy, pure aluminum can be significantly strengthened through heat treatment and alloying, and its strength can reach a level comparable to that of low-carbon steel. In addition, a certain degree of cold working can further strengthen the matrix strength of aluminum alloy, making the support performance of the pedal more reliable. Aluminum alloy also has the characteristic of light weight. The density of aluminum is about 2.7 g / cm 3 , which is only one-third of the density of steel. Therefore, the weight of aluminum material with the same volume is only about one-third of that of steel. Using aluminum alloy can greatly reduce the overall weight of the pedal, making it more convenient for maintenance personnel to carry. At the same time, aluminum alloy material has excellent processing performance and shows good extrusion performance during processing, making it easy to carry out secondary processing and bending, and can be processed into large sizes and complex cross-sectional shapes while maintaining high dimensional accuracy. This high precision and flexibility make the processing technology of the pedal simple and reduce the production cost of the pedal.

[0043] In this embodiment, in addition to using aluminum alloy material, fiber-reinforced plastic can also be used. Its characteristics include high strength and high modulus: the strength and modulus of the plastic are significantly improved after fiber reinforcement. The strength and modulus of some engineering plastics can approach the strength of steel after fiber reinforcement, which can ensure the support performance of the pedal; good shock absorption: due to the viscoelastic characteristics of the plastic matrix and the good vibration absorption ability of the interface between the fiber and the matrix in the reinforcing material, the vibration damping is very high, and early damage will not be caused by resonance; good fatigue resistance: the interface between the fiber and the matrix in the reinforced plastic can prevent crack propagation, making the fatigue resistance better than that of metal and making the pedal more durable; good overload safety: there are a large number of independent fibers in the fiber-reinforced plastic. When a small number of fibers break due to overload, the load will be quickly redistributed to the undamaged fibers, so that the entire component will not lose its bearing capacity in the short term, making the pedal more reliable; high heat resistance: the heat distortion temperature of unreinforced thermoplastic plastics is relatively low, and they can only work in a temperature environment of 50 - 200 °C for a long time, which is beneficial in hot summers, enabling the pedal to withstand the high temperature of direct sunlight; small linear expansion coefficient: the linear expansion coefficient of the reinforced plastic is low, and the molding shrinkage rate of the product is small, which brings very favorable conditions for manufacturing products with relatively high dimensional accuracy requirements, enabling the pedal to accurately fit the out-of-cabin handrail.

[0044] Embodiment 2:

[0045] This embodiment is similar to Embodiment 1, except that in this embodiment, as Figures 1 to 3 shown, a second card slot 32 for clamping with the out-of-cabin handrail 4 is provided on the cross beam 3. The notch of the second card slot 32 is inclined towards the middle of the cross beam 3. The distance between the bottoms of the first card slot 31 and the second card slot 32 is equal to the distance between two out-of-cabin handrails 4. Two cross beams 3 are respectively and fixedly connected to both sides of the bottom of the pedal body 1, and the first card slot 31 and the second card slot 32 are respectively provided on both sides of each cross beam 3.

[0046] In this embodiment, when installing the pedal, first respectively clamp the two second card slots 32 on the left and right sides of one out-of-cabin handrail 4, and then flip the pedal body 1 so that the two first card slots 31 can be vertically clamped on the left and right sides of the other out-of-cabin handrail 4; when storing the pedal, as Figure 3 shown, the pedal body 1 can be vertically suspended on one out-of-cabin handrail 4 through the two second card slots 32.

[0047] Embodiment 3:

[0048] This embodiment is similar to Embodiment 1, except that in this embodiment, as Figures 1 to 3 shown, a notch 13 for partially exposing the out-of-cabin handrail 4 is provided on one side of the pedal body 1. The notch 13 is a U-shaped structure, and an anti-slip pad is fixed on the edge of the notch 13.

[0049] In this embodiment, the notch 13 plays a role of avoiding space, which is convenient for maintenance personnel to hook the safety rope on the out-of-cabin handrail 4. At the same time, the setting of the anti-slip pad can prevent the notch 13 from wearing the safety rope.

[0050] Embodiment 4:

[0051] This embodiment is similar to Embodiment 1, except that in this embodiment, as Figures 1 to 4 shown, the pedal body 1 is composed of two identical panels 11 on the left and right, and one ends of the two panels 11 are hinged.

[0052] In this embodiment, the two panels 11 are connected by a first limit hinge 12, and the opening and closing angle of the first limit hinge 12 is 0 to 180°, so that the pedal body 1 can be folded along its center line to reduce the floor area and facilitate storage and carrying.

[0053] Embodiment 5:

[0054] This embodiment is similar to Embodiments 1 and 4, except that in this embodiment, as Figure 5 、 6As shown, the auxiliary plate 2 is separated from the pedal body 1, and each auxiliary plate 2 is respectively connected to the side surface of the pedal body 1 through a second limit hinge 22. The opening and closing angle of the second limit hinge 22 is 0-90°, which not only ensures the limiting function of the auxiliary plate 2 on the pedal, but also enables the auxiliary plate 2 to be folded and stored, with better portability.

[0055] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0056] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A fan exit safety pedal, characterized in that: The pedal body (1) comprises two auxiliary plates (2) mounted on two external handrails (4), wherein the two auxiliary plates (2) are respectively vertically connected to two sides of the bottom of the pedal body (1), and the spacing between the two auxiliary plates (2) corresponds to the width of the external handrails (4). The bottom of the pedal body (1) is provided with a first slot (31) for engaging with the external handrails (4).

2. A wind turbine exit safety pedal according to claim 1, characterized in that: At least one cross beam (3) is fixedly connected to the bottom of the pedal body (1), and the first clamping groove (31) is vertically arranged on the cross beam (3).

3. A wind turbine exit safety pedal according to claim 2, characterized in that: The cross beam (3) is provided with a second slot (32) for engaging with an external handrail (4); the slot opening of the second slot (32) is inclined toward the middle of the cross beam (3); and the spacing between the bottoms of the first slot (31) and the second slot (32) is equal to the spacing between the two external handrails (4).

4. A wind turbine exit safety pedal according to claim 2, characterized in that: Two cross beams (3) are respectively fixedly connected to the two sides of the bottom of the pedal body (1), and the first clamping groove (31) and the second clamping groove (32) are respectively provided on the two sides of each cross beam (3).

5. A wind turbine exit safety pedal according to claim 1, characterized in that: The auxiliary plate (2) is provided with a hanging hole (21).

6. A wind turbine exit safety pedal according to claim 1, characterized in that: The surface of the pedal body (1) is provided with anti-slip stripes.

7. A wind turbine exit safety pedal according to claim 1, characterized in that: A notch (13) is provided on one side of the pedal body (1) to partially expose the handrail (4) outside the cabin; the notch (13) is a U-shaped structure, and an anti-slip pad is fixed to the edge of the notch (13).

8. A wind turbine exit safety pedal according to claim 1, characterized in that: The pedal body (1) is composed of two identical left and right panels (11), and one end of the two panels (11) is hinged.

9. A wind turbine exit safety pedal according to claim 1, characterized in that: Both ends of the bottom of each sub-plate (2) are respectively provided with rounded corners.

10. A wind turbine exit safety pedal according to any one of claims 1 to 9, characterized in that: The pedal body (1) and each sub-plate (2) are made of the same material, which is aluminum alloy or fiber-reinforced plastic.

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