Platform cover opening and closing assembly and wind power tower platform

Abstract

The present application relates to the field of wind power generation technology, and discloses a platform cover plate opening and closing assembly, which comprises a cover plate, a guide wheel support, a first holding part, a second holding part and a flexible cable.The cover plate is rotatably connected to a platform body on one side, the guide wheel support is fixed above the platform body, a first guide wheel is fixed to the top end of the guide wheel support, the first holding part is arranged below the platform body and comprises a second guide wheel, the second holding part is arranged above the platform body and outside a platform channel formed in the platform body, one end of the flexible cable is connected to the upper surface of the cover plate, and the other end of the flexible cable is connected to the second holding part after sequentially passing through the first guide wheel and the second guide wheel.In the case of pulling down the first holding part, the second guide wheel moves as a movable pulley;in the case of pulling up the second holding part, the second guide wheel moves as a fixed pulley.The cover plate can be opened and closed through a simple connecting mechanism, and the operation is simple and safe.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a platform cover opening and closing assembly and a wind turbine tower platform. Background Technology

[0002] The operating status of wind turbine generators is related to the efficiency of wind power generation. When maintenance personnel pass through each platform inside the wind turbine tower, they need to open the platform cover and close the platform cover after passing through the platform.

[0003] Existing platform cover opening and closing components include electric and manual types. Existing electric cover opening and closing components may jam the platform cover after a power outage, making it impossible to open or close. Existing manual cover opening and closing components are inconvenient to operate and have low safety. Summary of the Invention

[0004] In view of this, the present invention provides a platform cover opening and closing assembly to solve the problems of existing electric cover opening and closing assemblies jamming after power failure and the inconvenience of opening and closing operations of existing manual cover opening and closing assemblies.

[0005] In a first aspect, the present invention provides a platform cover opening and closing assembly, including a cover plate, a guide wheel bracket, a first gripping part, a second gripping part, and a flexible cable. One side of the cover plate is rotatably connected to the platform body. The guide wheel bracket is fixed above the platform body, and a first guide wheel is fixedly mounted at the top of the guide wheel bracket. The first gripping part is located below the platform body and includes a second guide wheel. The second gripping part is located above the platform body and outside a platform passage opened on the platform body. One end of the flexible cable is connected to the upper surface of the cover plate, and the other end passes sequentially around the first guide wheel and the second guide wheel before connecting to the second gripping part; when the first gripping part is pulled downwards, the second guide wheel acts as a movable pulley moving away from the lower surface of the platform body; when the second gripping part is pulled upwards, when the first gripping part is pulled to abut against the lower surface of the platform body, the second guide wheel acts as a fixed pulley.

[0006] Beneficial Effects: Compared to existing manual platform cover opening and closing components, the platform cover opening and closing assembly in this embodiment of the invention achieves opening and closing of the cover through a simple connecting mechanism. This simplifies operation, prevents workers from accidentally falling from the platform passageway during operation, and enhances worker safety, thus improving the overall safety of the platform cover opening and closing assembly. Compared to existing automatic platform cover opening and closing components, this invention eliminates the risk of the cover failing to open or jamming after a power outage, ensuring stable and reliable operation.

[0007] In one alternative embodiment, the platform cover opening and closing assembly further includes a counterweight block connected to the side wall of the second guide wheel.

[0008] Beneficial effects: By setting a counterweight, the pulling force applied by the operator to the first grip or the first grip can be reduced, which can save the operator's physical strength and make it easier for the operator to open the cover.

[0009] In one optional embodiment, the platform cover opening and closing assembly further includes a counterweight bracket adapted to be fixed below the platform body, the counterweight bracket having a slide rail, and the counterweight disposed within the slide rail.

[0010] Beneficial effects: This design allows staff to pull the counterweight along the slide, making it easier for them to perform pull-down and push-up operations.

[0011] In one optional embodiment, the sidewall of the slide is sandwiched between the counterweight and the second guide wheel, and the sidewall of the slide is provided with an elongated hole extending in the vertical direction, the second guide wheel being adapted to move along the elongated hole.

[0012] Beneficial effects: This design facilitates the connection between the second guide wheel and the counterweight, and also prevents the second guide wheel from swaying left and right, which could affect the worker's pulling down or pushing up operation.

[0013] In one optional embodiment, the platform cover opening and closing assembly further includes an anti-detachment structure, the counterweight is locked inside the anti-detachment structure, and the second guide wheel is connected to the counterweight through the anti-detachment structure.

[0014] Beneficial effect: The anti-detachment structure can prevent the counterweight from detaching from the slide.

[0015] In one optional embodiment, a limiting member is provided on the side of the cover plate connected to the platform body, the limiting member being used to limit the opening angle of the cover plate.

[0016] Beneficial effect: By setting limiters, the opening angle of the cover can be prevented from being too large, avoiding inconvenience to staff when closing the cover under the platform.

[0017] In one alternative embodiment, the second gripping portion includes a compression elastic element that abuts against the upper surface of the platform body and is adapted to provide preload to the flexible cable.

[0018] Beneficial effect: The compression elastic element is always in a compressed state, providing appropriate preload to the flexible cable and preventing the flexible cable from detaching from the first or second guide wheel.

[0019] In one alternative embodiment, the platform cover opening and closing assembly further includes a third grip portion disposed on the upper surface of the cover.

[0020] Beneficial effect: When the platform cover opening and closing assembly malfunctions, workers can open or close the cover from above the platform body using the third gripping part.

[0021] In one alternative embodiment, the platform cover opening and closing assembly further includes a fourth grip portion disposed on the lower surface of the cover.

[0022] Beneficial effect: When the platform cover opening and closing assembly malfunctions, staff can open or close the cover from below the platform body using the fourth gripping part.

[0023] Secondly, the present invention also provides a wind turbine tower platform, including a platform body and the aforementioned platform cover opening and closing assembly. The platform body has a platform passage, and the platform cover opening and closing assembly is adapted to open or close the platform passage.

[0024] Beneficial effects: Since the wind turbine tower platform includes a platform cover opening and closing assembly, which has the same effect as the platform cover opening and closing assembly, it will not be elaborated here. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific 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 from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a platform cover opening and closing assembly according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 Another structural schematic diagram of the platform cover opening and closing assembly shown;

[0028] Figure 3 for Figure 1 This is another structural schematic diagram of the platform cover opening and closing assembly.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Cover plate; 11. Limiting component; 2. Guide wheel bracket; 21. First guide wheel; 3. First grip; 31. Second guide wheel; 32. Counterweight; 33. Counterweight bracket; 331. Slide rail; 3311. Long slot; 34. Anti-detachment structure; 35. First handle; 4. Second grip; 41. Compression elastic component; 42. Second handle; 5. Flexible rope; 6. Third grip; 7. Fourth grip; 8. Platform body; 81. Platform passage; 811. Escalator passage; 82. Through hole. Detailed Implementation

[0031] 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.

[0032] The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0033] According to an embodiment of the present invention, a platform cover opening and closing assembly is provided, including a cover plate 1, a guide wheel bracket 2, a first gripping part 3, a second gripping part 4, and a flexible cable 5. Specifically, one side of the cover plate 1 is rotatably connected to the platform body 8. The guide wheel bracket 2 is fixed above the platform body 8, and a first guide wheel 21 is fixedly provided at the top of the guide wheel bracket 2. The first gripping part 3 is disposed below the platform body 8, and includes a second guide wheel 31. The second gripping part 4 is disposed above the platform body 8 and is located outside the platform channel 81 opened on the platform body 8. One end of the flexible cable 5 is connected to the upper surface of the cover plate 1, and the other end passes sequentially around the first guide wheel 21 and the second guide wheel 31 before connecting to the second gripping part 4. When the first gripping part 3 is pulled downward, the second guide wheel 31 moves as a movable pulley in a direction away from the lower surface of the platform body; when the second gripping part 4 is pulled upward, when the first gripping part 3 is pulled to abut against the lower surface of the platform body 8, the second guide wheel 31 acts as a fixed pulley.

[0034] The guide wheel bracket 2 is located on the side where the cover plate 1 connects to the platform body 8. The guide wheel bracket has a certain height, and the first guide wheel 21 is located at the top of the guide wheel bracket 2. Directly below the first guide wheel 21, the platform body 8 has a through hole 82. One end of the flexible cable 5 is connected to the cover plate 1, and the other end extends to the top of the guide wheel bracket 2 and passes over the first guide wheel 21. Then, the end of the flexible cable 5 extends downward through the through hole 82 and passes under the second guide wheel 31. Finally, the end of the flexible cable 5 passes upward through the through hole 82 and connects to the second gripping part 4.

[0035] The main body of the platform 8 divides the space into upper and lower parts. Staff usually travel between the upper and lower parts through the platform passage 81 opened on the main body of the platform 8. The cover plate 1 closes the platform passage 81 when no staff are passing through to prevent staff from falling from the platform passage 81.

[0036] When the worker is below the platform body 8, they can pull down the first grip 3. At this time, the second guide wheel 31, acting as a movable pulley, moves away from the platform body 8. The second guide wheel 31 pulls down the flexible cable 5. Since the second grip 4 is above the platform body 8, the end of the flexible cable 5 connected to the second grip 4 will not be pulled below the platform body 8. Therefore, the other end of the flexible cable 5 is gradually pulled towards the first guide wheel 21, thereby causing the cover plate 1 to flip upwards towards the platform body 8, opening the platform passage 81. The worker can then pass through the platform passage 81 to reach the space above the platform body 8. When the second guide wheel 31 is used as a fixed pulley, it can save the worker the distance to pull down and avoid the danger of the worker having to move too much when pulling down the second guide wheel 31.

[0037] When the staff is above the platform body 8, the staff can pull the second grip 4 upward. When the first grip 3 is pulled to abut against the lower surface of the platform body 8, the second guide wheel 31 acts as a fixed pulley. The end of the flexible cable 5 connected to the second grip 4 is pulled upward, and the end of the flexible cable 5 connected to the cover plate 1 is gradually pulled toward the first guide wheel 21, thereby causing the cover plate 1 to flip upward toward the platform body 8, so that the platform passage 81 is opened, and the staff can pass through the platform passage 81 to reach the space below the platform body 8.

[0038] The platform cover opening and closing assembly in this embodiment of the invention can open and close the cover 1 through a simple connecting mechanism. Compared with the existing manual platform cover opening and closing assembly, when the operator opens the cover 1 from below, they only need to pull down the first grip 3, which is simple to operate. Furthermore, the second guide wheel 31 acts as a movable pulley, which can shorten the pulling distance of the first grip 3 and reduce the range of motion when the operator pulls down. When the operator opens the cover 1 from above, they only need to lift the second grip 4. Since the second grip 4 is located outside the platform channel 81, the operator's body will not be exposed above the platform channel 81 when opening the cover 1, preventing accidental falls from the platform channel 81 during operation, thus ensuring operator safety and improving the safety of the platform cover opening and closing assembly. Compared with the existing automatic platform cover opening and closing assembly, the platform cover opening and closing assembly in this embodiment of the invention does not have the risk of the cover 1 failing to open or jamming after a power outage. The platform cover opening and closing assembly in this embodiment of the invention operates stably and reliably.

[0039] In one embodiment, the first grip 3 and the second grip 4 respectively include a first handle 35 and a second handle, and the operator can pull the handle to open the cover 1.

[0040] In one embodiment, the platform cover opening and closing assembly further includes a counterweight 32, which is connected to the side wall of the second guide wheel 31. When the worker pulls the second grip 4 from above the platform body 8 to open the cover 1, the second guide wheel 31 acts as a fixed pulley. At this time, the force applied by the worker to the second grip 4 must be greater than the vertical component of the cover 1's own weight. When the worker pulls the first grip 3 from below the platform body 8, the second guide wheel 31 acts as a movable pulley. At this time, the force applied by the worker to the second grip 4 must be greater than twice the vertical component of the cover 1's own weight. By providing the counterweight 32, the pulling force applied by the worker to the first grip 3 or the second grip 4 can be reduced, saving the worker's physical strength and allowing the worker to open the cover 1 more easily.

[0041] Specifically, when the weight of the added counterweight 32 is balanced with the vertical component of the weight of the cover plate 1, the cover plate 1 forms a certain angle with the horizontal direction, which is called the balance angle, and the angle range of the balance angle is (0°, 90°). When the angle between the cover plate 1 and the horizontal direction is less than the balance angle, the vertical component of the weight of the cover plate 1 is greater than the weight of the counterweight 32, and the cover plate 1 automatically closes the platform passage 81. When the operator pulls down the first grip 3, the cover plate 1 can be moved when the sum of the pulling force applied by the operator and the weight of the counterweight 32 is greater than the vertical component of the weight of the plate 1. When the angle between the cover plate 1 and the horizontal direction is greater than the balance angle, the operator does not need to provide additional pulling force, and the flexible rope 5 can automatically pull the cover plate 1 to continue opening under the action of the weight of the counterweight 32.

[0042] The specific weight of the counterweight 32 can be set according to the weight of the cover plate 1 and the engineering requirements, and is not limited here.

[0043] In one embodiment, a limiting member 11 is provided on the side of the cover plate 1 connected to the platform body. The limiting member 11 is adapted to limit the opening angle of the cover plate 1. By setting the limiting member 11, the opening angle of the cover plate 1 can be prevented from being too large, thus avoiding inconvenience to the staff when closing the cover plate 1 under the platform body 8.

[0044] When the platform cover opening and closing assembly includes a counterweight 32, the maximum opening and closing angle of the cover 1 can be limited to within 90° by the limiting member 11. The angle of the balance angle is set to be less than the maximum opening and closing angle of the cover 1. When the opening angle of the cover 1 is greater than the balance angle, the cover 1 maintains the maximum opening and closing angle under the action of the weight of the counterweight 32. When the staff is located below the platform body 8 and needs to close the cover 1, they only need to push the counterweight 32 upward. When the opening angle of the cover 1 is less than the balance angle, the staff no longer needs to apply force. The cover 1 can flip downward under its own weight until the platform passage 81 is closed.

[0045] In one embodiment, the platform cover opening and closing assembly further includes a counterweight bracket 33, adapted to be fixed below the platform body. The counterweight bracket 33 has a slide rail 331, and the counterweight 32 is disposed within the slide rail 331. This arrangement allows workers to pull the counterweight 32 along the slide rail 331, making it easier for workers to perform pull-down and push-up operations.

[0046] Specifically, one end of the counterweight bracket 33 is connected to the lower surface of the platform body 8, and the other end extends vertically downward. One side of the counterweight bracket 33 is hollowed out, so that the slide rail 331 is directly connected to the external space of the counterweight bracket 33, which facilitates the installation and replacement of the counterweight 32.

[0047] In one embodiment, the sidewall of the slide 331 is sandwiched between the counterweight 32 and the second guide wheel 31. The sidewall of the slide 331 has an elongated hole 3311 extending vertically, and the second guide wheel 31 is adapted to move along the elongated hole 3311. The counterweight 32 is disposed within the slide 331, and the second guide wheel 31 is disposed on the outer wall of the counterweight support 33. The two are connected together through the elongated hole 3311. When the second guide wheel 31 moves up or down along the elongated hole 3311, it drives the counterweight 32 to move up or down within the slide 331. This arrangement facilitates the connection between the second guide wheel 31 and the counterweight 32 and also prevents the left-right swaying of the second guide wheel 31 from affecting the worker's pulling down or pushing up operation.

[0048] In one embodiment, the platform cover opening and closing assembly further includes an anti-detachment structure 34, in which a counterweight 32 is secured. The second guide wheel 31 is connected to the counterweight 32 via the anti-detachment structure 34. One side of the anti-detachment structure 34 is fitted against the bottom of the slide rail 331, and the other side is fitted against the side wall of the counterweight 32. The bottom edge of the anti-detachment structure 34 is bent upward to form a bent edge, which is semi-enclosed on the outside of the counterweight 32, thereby preventing the counterweight 32 from detaching from the slide rail 331. The semi-enclosed structure also facilitates the replacement of the counterweight 32.

[0049] In one embodiment, the second grip 4 includes a compression elastic element 41 adapted to abut against the upper surface of the platform body. The compression elastic element 41 is always in a compressed state, providing a suitable preload to the flexible cable 5 and preventing the flexible cable 5 from detaching from the first guide wheel 21 or the second guide wheel 31.

[0050] Specifically, the compression elastic element 41 can be a conical spring. The larger diameter end of the conical spring abuts against the upper surface of the platform body 8, and the smaller diameter end abuts against the second handle 42 of the second grip part 4. The flexible cable 5 is connected to the second handle 42. When the cover plate 1 is in the closed state, the conical spring applies an upward force to the second handle 42, the second handle 42 pulls the flexible cable 5, and the flexible cable 5 causes the first grip part 3 to abut against the lower surface of the platform body 8.

[0051] In one embodiment, the platform cover opening and closing assembly further includes a third gripping part 6, which is disposed on the upper surface of the cover 1. If the platform cover opening and closing assembly malfunctions during operation, such as in the event of a breakage of the flexible cable 5, the operator can open or close the cover 1 from above the platform body 8 using the third gripping part 6.

[0052] In one embodiment, the platform cover opening and closing assembly further includes a fourth gripping part 7, which is disposed on the lower surface of the cover 1. If the platform cover opening and closing assembly malfunctions during operation, such as in the event of a breakage of the flexible cable 5, the operator can open or close the cover 1 from below the platform body 8 using the fourth gripping part 7.

[0053] In one embodiment, the flexible cord 5 can be a nylon rope or a PU (polyurethane) rope. In other embodiments, the flexible cord 5 can also be replaced by a V-belt, a flat belt, a round belt, or a multi-ribbed belt, etc., and the first guide wheel 21 and the second guide wheel 31 can be replaced by pulleys accordingly. The flexible cord 5 can also be replaced by a chain, and the first guide wheel 21 and the second guide wheel 31 can be replaced by sprockets accordingly, without further limitations.

[0054] According to an embodiment of the present invention, another aspect provides a wind turbine tower platform, including a platform body 8 and the aforementioned platform cover opening and closing assembly. The platform body 8 is provided with a platform channel 81, and the platform cover opening and closing assembly is adapted to open or close the platform channel 81.

[0055] Platform passage 81 has an escalator passage 811. The escalator of the wind turbine tower passes through the escalator passage 811. When the cover plate 1 closes the platform passage 81, the staff cannot pass through the platform passage 81. They need to use the first gripping part 3 or the second gripping part 4 to open the cover plate 1 and then use the climb-free device to move up and down on the escalator to pass through the platform passage 81.

[0056] When the worker reaches the platform body 8 using the non-climbing device, they can extend their left hand and pull down the first grip 3 to open the cover 1 and pass through the platform passage 81. During the pull-down process, the second guide wheel 31 acts as a movable pulley, saving the pull-down distance, and the counterweight 32 reduces the pulling force required by the worker. When the worker reaches the top of the platform body 8 using the non-climbing device, they need to step off the device and move to the side of the cover 1, then pull the second grip 4 to open the cover 1. During the pulling process, the worker's body remains outside the platform passage 81, preventing accidental falls from the platform passage 81 when opening the cover, thus ensuring the worker's safety.

[0057] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A platform cover opening and closing assembly, characterized in that, include: The cover plate (1) is rotatably connected to the platform body on one side; The guide wheel bracket (2) is fixed above the platform body, and the top of the guide wheel bracket (2) is fixed with a first guide wheel (21). The first grip (3) is located below the main body of the platform, and the first grip (3) includes a second guide wheel (31). The second gripping part (4) is located above the main body of the platform and outside the platform channel opened on the main body of the platform; The flexible cable (5) is connected at one end to the upper surface of the cover plate (1), and at the other end, it passes through the first guide wheel (21) and the second guide wheel (31) in sequence and is connected to the second gripping part (4). When the first gripping part (3) is pulled down, the second guide wheel (31) moves as a movable pulley away from the lower surface of the platform body. When the second gripping part (4) is pulled up, when the first gripping part (3) is pulled to abut against the lower surface of the platform body, the second guide wheel (31) acts as a fixed pulley. Counterweight (32), the counterweight (32) is connected to the side wall of the second guide wheel (31); The counterweight bracket (33) is suitable for being fixed below the platform body. The counterweight bracket (33) is provided with a slide (331), and the counterweight (32) is disposed in the slide (331). The side wall of the slide (331) is sandwiched between the counterweight (32) and the second guide wheel (31). The side wall of the slide (331) is provided with an elongated hole (3311) extending in the vertical direction. The second guide wheel (31) is suitable for moving along the elongated hole (3311).

2. The platform cover opening and closing assembly according to claim 1, characterized in that, The platform cover opening and closing assembly also includes an anti-detachment structure (34), the counterweight (32) is locked in the anti-detachment structure (34), and the second guide wheel (31) is connected to the counterweight (32) through the anti-detachment structure (34).

3. The platform cover opening and closing assembly according to claim 1, characterized in that, The second gripping part (4) includes a compression elastic element (41) that abuts against the upper surface of the platform body.

4. The platform cover opening and closing assembly according to claim 1, characterized in that, The cover plate (1) is provided with a limiting member (11) on the side connected to the platform body. The limiting member (11) is used to limit the opening angle of the cover plate (1).

5. The platform cover opening and closing assembly according to claim 1, characterized in that, The platform cover opening and closing assembly also includes a third gripping part (6), which is disposed on the upper surface of the cover (1).

6. The platform cover opening and closing assembly according to claim 1, characterized in that, The platform cover opening and closing assembly also includes a fourth gripping part (7), which is disposed on the lower surface of the cover (1).

7. A wind turbine tower platform, characterized in that, include: The main body of the platform (8) has a platform channel (81); The platform cover opening and closing assembly according to any one of claims 1 to 6, wherein the platform cover opening and closing assembly is adapted to open or close the platform channel (81).

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