A safety interlock for a wind turbine hoistway

Abstract

The utility model discloses a kind of safety interlocking devices for wind power generator set hoist hole, it is related to wind power generator set technical field, it includes hoist hole fence, hoist hole cover plate, driving assembly and travel switch component, the hoist hole fence, hoist hole cover plate, driving assembly, travel switch component are all arranged in cabin platform;Hoist hole cover plate is assembled in hoist hole position, hoist hole fence is installed in hoist hole periphery, and the opening and closing state of hoist hole cover plate in hoist hole position is controlled by the action of driving assembly, travel switch component, hoist hole fence.The utility model is automatically triggered by the operation of the device, effectively prevents personnel falling accident caused by misoperation, effectively guarantees the personal safety of operating personnel, and improves construction safety.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, and in particular to a safety interlock device for the lifting hole of a wind turbine generator. Background Technology

[0002] Wind turbine nacelles are generally quite tall, with large hoisting holes at the bottom, and the guardrails for these holes are typically simple. In practice, personnel must manually open the bottom hoisting hole cover before installing the guardrails, which could pose a risk of falls from height.

[0003] To prevent personal injury accidents caused by personnel having to bend over to manually open the hoisting hole, an automatic safety interlock device for the hoisting hole and the hoisting hole fence of the wind turbine nacelle needs to be designed. This device would allow the hoisting hole cover to open automatically after the worker sets up the hoisting hole fence, preventing personnel from having to bend over to manually open the cover and thus avoiding falls from heights, while also increasing work efficiency. Utility Model Content

[0004] To address the existing problems, this utility model provides a safety interlock device for the lifting hole of a wind turbine generator set.

[0005] To achieve the objectives of this utility model, the technical solution adopted by this utility model is as follows:

[0006] A safety interlock device for a hoisting hole of a wind turbine generator set includes a hoisting hole fence, a hoisting hole cover, a drive assembly, and a limit switch assembly. The hoisting hole fence, the hoisting hole cover, the drive assembly, and the limit switch assembly are all located inside the nacelle platform. The hoisting hole cover is mounted at the hoisting hole position, and the hoisting hole fence is installed around the hoisting hole. The opening and closing state of the hoisting hole cover at the hoisting hole position is controlled by the movement of the drive assembly, the limit switch assembly, and the hoisting hole fence.

[0007] Based on the above technical solution, the limit switch assembly further includes a first limit switch, which is a normally open limit switch, and the first limit switch is located at the bottom of the hanging hole fence.

[0008] Based on the above technical solution, the limit switch assembly further includes a second limit switch, which is a normally open limit switch, and is located at the end travel position that the hoisting hole fence can reach when it is opened outward.

[0009] Based on the above technical solution, the limit switch assembly further includes a third limit switch, which is a normally closed limit switch, and the third limit switch is installed on the hoisting hole fence on one side of the hoisting hole.

[0010] Based on the above technical solution, the limit switch assembly further includes a fourth limit switch, which is a normally closed limit switch. The fourth limit switch is installed on either side of the hoisting hole and faces the interior of the engine room platform.

[0011] Based on the above technical solution, the hoisting hole is further located at the bottom of the cabin platform, and the cabin platform is connected to the external environment through the hoisting hole.

[0012] Based on the above technical solution, the drive assembly further includes a motor connecting rod and a drive motor, and the drive motor is installed at the bottom of the cabin platform, with the output shaft of the drive motor connected to one end of the motor connecting rod.

[0013] Based on the above technical solution, furthermore, the other end of the motor connecting rod is fixedly connected to the upper end of the lifting hole cover plate.

[0014] Based on the above technical solution, furthermore, the cover plate of the lifting hole is interference-fitted with the upper end of the lifting hole.

[0015] Compared with the prior art, the beneficial effects of this utility model are specifically reflected in:

[0016] This invention improves the flexibility and operability of the entire device by setting multiple limit switches at different positions. By triggering the limit switches at different positions, the drive motor can open and close the lifting hole cover and coordinate with the lifting hole fence in different states. At the same time, the automatic triggering operation of this device effectively prevents personnel falls caused by misoperation, effectively protects the personal safety of workers, and improves construction safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the device of this utility model;

[0018] Figure 2 This is the circuit diagram corresponding to the device of this utility model;

[0019] Reference numerals in the attached drawings: 1. Cabin platform; 2. Hoisting hole enclosure; 3. Hoisting hole cover; 4. Motor connecting rod; 5. Drive motor; 6. First limit switch; 7. Second limit switch; 8. Third limit switch; 9. Fourth limit switch. Detailed Implementation

[0020] The present invention will be further described and illustrated below with reference to the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention can be combined accordingly, provided that there is no mutual conflict.

[0021] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0022] In the description of this utility model, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or indirectly connected, i.e., there is an intermediate element. Conversely, when an element is said to be "directly" connected to another element, there is no intermediate element.

[0023] In the description of this utility model, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features.

[0024] Example 1

[0025] Combination Figure 1 As shown, this embodiment provides a safety interlock device for the hoisting hole of a wind turbine generator set, which includes a hoisting hole enclosure 2, a hoisting hole cover 3, a drive assembly, and a limit switch assembly; wherein, the hoisting hole enclosure 2, the hoisting hole cover 3, the motor connecting rod 4, the drive motor 5, and the limit switch assembly are all located inside the nacelle platform 1; the hoisting hole cover 3 is assembled at the hoisting hole position, and the hoisting hole enclosure 2 is installed around the hoisting hole. The opening and closing state of the hoisting hole cover 3 at the hoisting hole position is controlled by the action of the drive assembly, the limit switch assembly, and the hoisting hole enclosure 2.

[0026] Specifically, the hanging hole fence 2 can be a fence structure that is assembled or welded together by multiple horizontal and vertical railings. The specific design can be based on actual needs. Its structure and overall shape are common existing ones, such as U-shaped frames, etc., which will not be elaborated on here.

[0027] The bottom of the cabin platform 1 is provided with a hoisting hole, through which the interior of the cabin platform 1 is connected to the external environment. The upper end of the hoisting hole is provided with a hoisting hole cover plate 3 that is interference-fitted with it. One side of the hoisting hole cover plate 3 is fixedly connected to the perimeter of the hoisting hole. It should be noted that the shape of the hoisting hole is not limited, and correspondingly, the shape of the hoisting hole cover plate 3 is also not limited, as long as it fits the hoisting hole.

[0028] The drive assembly includes a motor linkage 4 and a drive motor 5. The drive motor 5 is also provided on the same side of the hoisting hole enclosure 2 where the hoisting hole is located. The drive motor 5 is installed at the bottom of the cabin platform 1, and the output shaft of the drive motor 5 is connected to one end of the motor linkage 4. The other end of the motor linkage 4 is fixedly connected to the upper end of the hoisting hole cover plate 3. By starting the drive motor 5, the motor linkage 4 can be driven to perform mechanical action, thereby driving the side of the hoisting hole cover plate 3 that is not fixedly connected to the motor linkage 4 to move away from or towards the hoisting hole, which can be understood as the opening operation of the hoisting hole cover plate 3.

[0029] The limit switch assembly consists of multiple limit switches, specifically a first limit switch 6, a second limit switch 7, a third limit switch 8, and a fourth limit switch 9; wherein, the first limit switch 6 is a normally open limit switch, which is located at a position at the bottom of the hanging hole fence 2. Preferably, the bottom of the hanging hole fence 2 can be provided as a support leg structure with a groove, and the first limit switch 6 is located at the groove position of the support leg.

[0030] Furthermore, the second limit switch 7 is also a normally open limit switch. The second limit switch 7 is located at the end travel position that the hoisting hole fence 2 can reach when it is opened outward (that is, opened away from the hoisting hole). It should be noted that the end travel position can be set to a structure that facilitates the second limit switch 7, or it can be directly the inner wall of the cabin platform 1. The specific setting depends on the actual situation, and no further restrictions are made here.

[0031] Furthermore, the third limit switch 8 is a normally closed limit switch, which is installed on the hoisting hole fence 2 on one side of the hoisting hole; the fourth limit switch 9 is also a normally closed limit switch, which is installed on either side of the hoisting hole and faces the interior of the cabin platform 1.

[0032] In this embodiment, the working principle of each limit switch is as follows:

[0033] After the hoisting hole enclosure 2 is closed, the first limit switch 6 closes and the second limit switch 7 opens, energizing the drive motor 5 to rotate forward. This, in turn, drives the hoisting hole cover 3 to open automatically via the motor connecting rod 4. When the hoisting hole cover 3 contacts or triggers the third limit switch 8 to open, the drive motor 5 stops rotating. When the hoisting hole enclosure 2 reaches its final travel position, the first limit switch 6 opens and the second limit switch 7 closes, energizing the drive motor 5 to rotate in reverse. This, in turn, drives the hoisting hole cover 3 to close automatically via the motor connecting rod 4. When the hoisting hole cover 3 contacts or triggers the fourth limit switch 9, the drive motor 5 stops rotating.

[0034] Reference Figure 2 The parameters in the circuit diagram are as follows:

[0035] SQ6, SQ7, SQ8, and SQ9 represent limit switches. SQ6 corresponds to the first limit switch 6, SQ7 to the second limit switch 7, SQ8 to the third limit switch 8, and SQ9 to the fourth limit switch 9. M represents the three-phase drive motor 5; SB1 represents the main control switch, used to control the entire device; FR represents a three-phase thermal relay; FU1 and FU2 represent fuses; U, V, and W represent the phase wires (live wires) of the three-phase power supply; KM1 and KM2 are the coils of contactor one and contactor two, respectively, and KM1” and KM2” are the normally open contacts of contactor one and contactor two, respectively; FR is a three-phase thermal relay; FU is a fuse; and M is a three-phase motor.

[0036] Specifically, the circuit control principle of the entire device is as follows: After the hoisting hole fence 2 leaves the fixed point, the second limit switch 7 at the fixed point opens, that is, SQ7 opens. When the hoisting hole fence 2 is closed, the first limit switch 6 closes, that is, SQ6 closes, energizing the coil KM1 of contactor one. The normally open contact KM1” of contactor one closes, energizing the drive motor 5 to rotate forward. Through the motor connecting rod 4, the hoisting hole cover 3 is automatically opened. When the hoisting hole cover 3 leaves the fourth limit switch 9, SQ9 closes. When the hoisting hole cover 3 touches the third limit switch, SQ8 is opened, the coil KM1 of contactor one is de-energized, the normally open contact KM1” of contactor one opens, and the drive motor 5 stops. When the hoisting hole enclosure 2 moves away from the first limit switch 6, SQ6 opens. When the hoisting hole enclosure 2 opens to its fixed point, the second limit switch 7 closes, which is also the case that SQ7 closes. At this time, the coil KM2 of contactor two is energized, and the normally open contact KM2” of contactor two closes, causing the drive motor 5 to be energized and reversed. Through the motor connecting rod 4, the hoisting hole cover 3 is automatically closed. When the hoisting hole cover 3 moves away from the third limit switch 8, SQ8 closes. When the hoisting hole cover 3 triggers the fourth limit switch 9, SQ9 opens, the coil KM2 of contactor two is de-energized, and the normally open contact KM2” of contactor two closes, stopping the drive motor 5. It should be noted that in actual operation, according to the requirements of the power safety regulations, personnel must wear safety clothing and attach safety hooks to secure points when opening and closing the hoisting hole of the wind turbine generator. Therefore, it is safe even when the hoisting hole enclosure 2 and the hoisting hole cover 3 are in the open state.

[0037] The above are merely embodiments of this utility model, described in a relatively specific and detailed manner, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A safety interlock device for the lifting hole of a wind turbine generator set, characterized in that, This includes the hoisting hole enclosure, hoisting hole cover, drive assembly, and limit switch assembly. The hoisting hole enclosure, hoisting hole cover, drive assembly, and limit switch assembly are all located inside the engine room platform. The lifting hole cover is installed at the lifting hole position, and the lifting hole railing is installed around the lifting hole; The drive assembly includes a motor connecting rod and a drive motor. The drive motor is installed at the bottom of the cabin platform. The output shaft of the drive motor is connected to one end of the motor connecting rod, and the other end of the motor connecting rod is fixedly connected to the upper end of the hoisting hole cover plate. The limit switch assembly includes multiple limit switches disposed around the hoisting hole enclosure and the hoisting hole, and the limit switch assembly is electrically connected to the drive motor; The opening and closing action of the hanging hole fence triggers the corresponding limit switch, causing the drive motor to rotate forward or reverse, which in turn drives the hanging hole cover plate to automatically open or close at the hanging hole position via the motor linkage.

2. A safety interlock device for a lifting hole of a wind turbine generator set according to claim 1, characterized in that, The limit switch assembly includes a first limit switch, which is a normally open limit switch, and is located at the bottom of the hanging hole enclosure.

3. A safety interlock device for a lifting hole of a wind turbine generator set according to claim 1, characterized in that, The limit switch assembly includes a second limit switch, which is a normally open limit switch, and is located at the end travel position that the hoisting hole fence can reach when opened outward.

4. A safety interlock device for a lifting hole of a wind turbine generator set according to claim 1, characterized in that, The limit switch assembly includes a third limit switch, which is a normally closed limit switch, and the third limit switch is installed on the hoisting hole fence on one side of the hoisting hole.

5. A safety interlock device for a lifting hole of a wind turbine generator set according to claim 1, characterized in that, The limit switch assembly includes a fourth limit switch, which is a normally closed limit switch. The fourth limit switch is installed on either side of the hoisting hole and faces the interior of the engine room platform.

6. A safety interlock device for a lifting hole of a wind turbine generator set according to claim 1, characterized in that, The hoisting hole is located at the bottom of the cabin platform, and the cabin platform is connected to the external environment through the hoisting hole.

7. A safety interlock device for a lifting hole of a wind turbine generator set according to claim 1, characterized in that, The cover plate of the lifting hole is interference-fitted with the upper end of the lifting hole.

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