Fan tower platform automatic cover opening angle stepless adjusting mechanism

Abstract

The utility model relates to a kind of fan tower platform automatic cover plate opening angle stepless adjusting mechanism. Including rotary drive device and swing drive device;Rotary drive device is fixedly installed on tower platform, including installation bottom plate, and top plate is supported and installed using support plate in the top of installation bottom plate, and rotary shaft is installed on top plate, further including the rotary drive assembly of driving rotary shaft rotation;Swing drive device includes the base plate of the upper end fixed connection of rotary shaft, swing shaft is installed using shaft seat on base plate, swing arm is fixedly installed on swing shaft, and swing arm's root is fixedly connected with swing shaft, further including the swing drive assembly of driving swing shaft rotation. The utility model realizes the stepless continuous type adjustment of the opening angle of platform cover plate, so that the platform cover plate in opening state can be deflected to the position moderately away from platform window to avoid the adverse effect on the passage of personnel and materials.

Description

Technical Field

[0001] This utility model belongs to the field of wind power equipment technology, and in particular relates to a stepless adjustment mechanism for the opening angle of an automatic cover plate on a wind turbine tower platform. Background Technology

[0002] The internal tower platform of a wind turbine serves as a support platform for personnel to stand and inspect inside. Multiple tower platforms are typically installed vertically within the wind turbine tower. Each tower platform requires a platform window for longitudinal personnel passage, and a ladder is installed within each window. The ladder is fixed to the inner wall of the tower using supports. The ladder serves as an auxiliary passage for personnel to ascend and descend. To reduce the burden on personnel, existing wind turbine equipment typically includes a non-climbing device. Personnel use this device to move along the ladder and through the platform window. The wind turbine tower platform cover is installed on the platform inside the wind turbine tower. It opens when personnel are passing through and closes when no personnel are passing through. When the platform cover is closed, it seals the platform window, improving the safety of personnel on the tower platform.

[0003] The specification of Chinese invention patent CN202210746014.2 discloses a flip-top cover device for a wind turbine tower platform. The cover is opened and closed using a winding and unwinding assembly and a pull strap. This technical solution has the following drawbacks: First, the pull strap is a flexible strap, and the cover relies on its own weight during the closing process, which may cause the cover to fail to close smoothly in some cases. Second, after the cover is opened, it is located to the side of the platform window, which to some extent restricts the passage of personnel and materials through the platform window.

[0004] In summary, a new type of tower platform cover plate opening and closing adjustment mechanism needs to be developed to solve the aforementioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide an automatic cover plate opening angle stepless adjustment mechanism for wind turbine tower platforms, so as to realize stepless continuous adjustment of the opening angle of the platform cover plate, allowing the platform cover plate in the open state to be deflected to a position moderately away from the platform window to avoid adversely affecting the passage of personnel and materials.

[0006] The technical solution adopted by this utility model is as follows: an automatic cover opening angle stepless adjustment mechanism for a wind turbine tower platform, including a rotary drive device and a swing drive device; the rotary drive device is installed and fixed on the tower platform, including a mounting base plate, a top plate supported by a support plate above the mounting base plate, a rotary shaft installed on the top plate, and a rotary drive assembly for driving the rotary shaft to rotate; the swing drive device includes a base plate fixedly connected to the upper end of the rotary shaft, a swing shaft installed on the base plate by a bearing seat, a swing arm fixedly installed on the swing shaft, the root of the swing arm fixedly connected to the swing shaft, and a swing drive assembly for driving the swing shaft to rotate; the platform cover is fixedly connected to the swing arm, and when the swing arm swings to a horizontal state, the platform cover closes the platform window.

[0007] Preferably, the rotary drive assembly includes a drive pulley fixed on the mounting base plate and a driven pulley installed at the lower end of the rotary shaft. The drive pulley and the driven pulley are located between the mounting base plate and the top plate. A transmission belt is provided between the drive pulley and the driven pulley. The assembly also includes a rotary drive motor that drives the drive pulley to rotate. The rotary drive motor is an AC variable frequency motor.

[0008] Preferably, the slewing drive motor is located below the mounting base plate, and an installation window is provided on the outside of the platform window on the tower platform. The slewing drive motor is located inside the installation window, and the mounting base plate is fixedly connected to the tower platform with bolts.

[0009] Preferably, the swing drive assembly includes a support base fixed on the base plate, a swing drive motor is fixed on the support base, the output shaft of the swing drive motor is connected to the shaft end of the swing shaft, and the swing drive motor is an AC variable frequency motor.

[0010] Preferably, it further includes two swing angle detection probes arranged circumferentially at 90° intervals for detecting the swing angle of the swing arm, wherein one swing angle detection probe generates a detection signal when the swing arm reaches the horizontal position and the other swing angle detection probe generates a detection signal when the swing arm reaches the vertical position; it also includes two rotation angle detection probes arranged circumferentially at 180° intervals for detecting the rotation angle, wherein one rotation angle detection probe generates a detection signal when the swing drive device rotates to the initial position and the other rotation angle detection probe generates a detection signal when the swing drive device rotates to the avoidance position.

[0011] Preferably, both the swing angle detection probe and the rotation angle detection probe are proximity switches. One swing angle detection probe is installed at the front of the shaft seat and the other swing angle detection probe is installed at the top of the shaft seat. The swing angle detection probe generates a detection signal when the swing arm approaches. One rotation angle detection probe is installed at the front edge of the top plate and the other rotation angle detection probe is installed at the rear edge of the top plate. A metal block is installed at the bottom of the base plate. The rotation angle detection probe generates a detection signal when the metal block approaches.

[0012] Preferably, it also includes a field controller and two operating switches, one above and one below. The upper operating switch is located at the operating position above the tower platform, and the lower operating switch is located at the operating position below the tower platform. The operating switches, the slewing drive motor, the swing drive motor, the swing angle detection probe, and the rotation angle detection probe are all connected to the field controller.

[0013] The advantages and positive effects of this utility model are:

[0014] This invention provides a stepless adjustment mechanism for the opening angle of an automatic cover plate on a wind turbine tower platform. By incorporating a swing drive device with a swing arm, the platform cover plate can be opened by flipping and can be paused and held at any position, thus achieving stepless continuous adjustment of the opening angle. Furthermore, the swing drive device, its swing arm, and the platform cover plate are driven by a rotary drive device. After the platform cover plate flips open, the rotary drive device can rotate the swing drive device, its swing arm, and the platform cover plate horizontally by a certain angle to move them away from the platform window. This prevents the open platform cover plate from adversely affecting personnel and materials passing through the platform window. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of the present invention in the installation state;

[0016] Figure 2 This is a three-dimensional structural diagram of the main body of this utility model, from a top view.

[0017] Figure 3 yes Figure 2 A three-dimensional structural diagram of the slewing drive device, viewed from above.

[0018] In the picture:

[0019] 1. Mounting window; 2. Rotary drive motor; 3. Swing drive motor; 4. Swing arm; 5. Platform cover plate; 6. Platform window; 7. Ladder; 8. Mounting base plate; 9. Top plate; 10. Support plate; 11. Drive pulley; 12. Transmission belt; 13. Driven pulley; 14. Base plate; 15. Shaft seat; 16. Swing angle detection probe; 17. Swing shaft; 18. Support seat; 19. Angle detection probe; 20. Rotary shaft. Detailed Implementation

[0020] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0021] Please see Figure 1The wind turbine tower platform automatic cover opening angle stepless adjustment mechanism of this utility model includes a rotary drive device and a swing drive device. The rotary drive device is installed and fixed on the tower platform. The swing drive device is used to drive the platform cover 5 to perform a flipping action, realizing the opening and closing of the platform cover 5 from the platform window 6. The rotary drive device is used to drive the swing drive device and the platform cover 5 to rotate a certain angle in the horizontal direction. In this way, the platform cover 5 in the open state can be appropriately moved away from the platform window 6 to avoid adversely affecting the passage of personnel and materials.

[0022] Please see Figure 2 and Figure 3 It can be seen that:

[0023] The slewing drive device includes a mounting base plate 8, which is fixedly connected to the tower platform. A top plate 9 is mounted on the top plate 8 using a support plate 10. A slewing shaft 20 is mounted on the top plate 9. The device also includes a slewing drive assembly for driving the slewing shaft 20 to rotate.

[0024] In this embodiment, the rotary drive assembly includes a drive pulley 11 fixed on the mounting base plate 8 and a driven pulley 13 installed at the lower end of the rotary shaft 20. The drive pulley 11 and the driven pulley 13 are located between the mounting base plate 8 and the top plate 9. A transmission belt 12 is provided between the drive pulley 11 and the driven pulley 13. The assembly also includes a rotary drive motor 2 that drives the drive pulley 11 to rotate. The rotary drive motor 2 is an AC variable frequency motor.

[0025] In this embodiment, the rotary drive motor 2 is located below the mounting base plate 8. An installation window 1 is provided on the outside of the platform window 6 on the tower platform. The rotary drive motor 2 is located inside the installation window 1, and the mounting base plate 8 is fixedly connected to the tower platform with bolts.

[0026] Please see Figure 2 It can be seen that:

[0027] The swing drive device includes a base plate 14 fixedly connected to the upper end of the rotary shaft 20. A swing shaft 17 is mounted on the base plate 14 using a bearing 15. A swing arm 4 is fixedly mounted on the swing shaft 17, and the root of the swing arm 4 is fixedly connected to the swing shaft 17. It also includes a swing drive assembly for driving the swing shaft 17 to rotate.

[0028] In this embodiment, the swing drive assembly includes a support base 18 mounted and fixed on the base plate 14. A swing drive motor 3 is mounted and fixed on the support base 18. The output shaft of the swing drive motor 3 is connected to the shaft end of the swing shaft 17. The swing drive motor 3 is an AC variable frequency motor.

[0029] Platform cover 5 is fixedly connected to swing arm 4. When swing arm 4 swings to a horizontal position, platform cover 5 closes platform window 6. As shown in the figure, a strip-shaped connecting hole is provided at the front of swing arm 4, and a back base is provided at the back of platform cover 5. The back base is fixedly connected to swing arm 4 with bolts located in the strip-shaped connecting hole. By loosening and tightening the bolts, platform cover 5 can be moved along the length of swing arm 4. This allows the platform cover 5 and platform window 6 to be accurately positioned during the installation and debugging of the adjustment mechanism and platform cover 5.

[0030] It also includes two swing angle detection probes 16 spaced 90° apart circumferentially for detecting the swing angle of the swing arm 4. One swing angle detection probe 16 generates a detection signal when the swing arm 4 reaches the horizontal position, and the other swing angle detection probe 16 generates a detection signal when the swing arm 4 reaches the vertical position. Thus, the positions of the two swing angle detection probes 16 are the starting position and the ending position of the swing arm 4. It also includes two rotation angle detection probes 19 spaced 180° apart circumferentially for detecting the rotation angle. One rotation angle detection probe 19 generates a detection signal when the swing drive device rotates to the initial position, and the other rotation angle detection probe 19 generates a detection signal when the swing drive device rotates to the avoidance position. The initial position refers to the position when the platform cover 5 is closed on the platform window 6, and the avoidance position refers to the position where the platform cover 5 is moderately away from the platform window 6.

[0031] In this embodiment, both the swing angle detection probe 16 and the rotation angle detection probe 19 are proximity switches. One swing angle detection probe 16 is installed at the front of the bearing seat 15, and the other swing angle detection probe 19 is installed at the top of the bearing seat 15, with an angle of 90° between them (centered on the swing shaft 17). The swing angle detection probe 16 generates a detection signal when the swing arm 14 approaches. In this embodiment, one rotation angle detection probe 19 is installed at the front edge of the top plate 9, and the other rotation angle detection probe 19 is installed at the rear edge of the top plate 9, with an angle of 180° between them (centered on the rotation shaft 20). A metal block is installed at the bottom of the base plate 14, and the rotation angle detection probe 19 generates a detection signal when the metal block approaches.

[0032] It also includes a field controller and two operating switches, one above and one below. The upper operating switch is located above the tower platform, and the lower operating switch is located below the tower platform. When personnel move from the lower to the higher position inside the tower along the ladder 7 inside the platform window 6, they can operate the operating switch at the lower operating position to control the adjustment mechanism to open and move the platform cover 5 to meet the passage conditions. When personnel reach the upper operating position, they can operate the operating switch at the upper operating position to control the adjustment mechanism to restore the platform cover 5 to its original position and close the platform window 6. This can prevent personnel and materials from falling from the platform window 6.

[0033] The two operating switches, the rotary drive motor 2, the swing drive motor 3, and the two swing angle detection probes 16 and 19 are all connected to the field controller. The field controller is equipped with a frequency converter, and the rotary drive motor 2 and the swing drive motor 3 are controlled by the frequency converter.

[0034] Operating method:

[0035] In the initial state, the platform cover 5 rotates to its initial position and the swing arm 4 is in a horizontal position. The platform cover 5 is closed over the platform window 6, which is closed, thus shutting off the passageway. When personnel ascend the ladder 7 by climbing independently or using a non-climbing device, they first move to the position of the operating switch below the tower platform. By operating the switch, they control the opening of this adjustment mechanism. Specifically, they first control the swing drive motor 3 to run, which causes the swing arm 4 to drive the platform cover 5 to flip open, gradually flipping from a horizontal position to a vertical position until the swing angle detection probe 16 detects the swing arm 4 in a vertical position and automatically stops. The maximum opening angle of the platform cover 5 is set to 90° (of course, it can also be paused at any position in the middle, and it does not necessarily have to be fully open to allow passage). If the passage needs can be met without rotating the platform cover 5, then there is no need to operate the rotary drive motor 2. When it is necessary to rotate the platform cover 5 to move it away from the platform window 6 (such as when personnel are carrying materials or when the platform cover 5 may affect passage), the rotary drive motor 2 is operated, and the swing drive device and its swing arm 4, as well as the platform cover 5, rotate 180° outward and then stop (of course, it can also be paused at any position in the middle).

[0036] Afterwards, the personnel continue to move upwards along ladder 7. When they reach the position of the operating switch above the tower platform, they first operate the rotary drive motor 2 to rotate the swing drive device, its swing arm 4, and the platform cover plate 5 back to their original positions. Then, they operate the swing drive motor 3 to rotate the swing arm 4 and the platform cover plate 5 to gradually close until the swing angle detection probe 16 detects that the swing arm 4 is in a horizontal position and stops automatically. The operation is similar when the personnel move downwards along ladder 7, and will not be described in detail.

Claims

1. A stepless adjustment mechanism for the opening angle of an automatic cover plate on a wind turbine tower platform, characterized in that: The device includes a slewing drive and a swing drive. The slewing drive is installed and fixed on the tower platform, including a mounting base plate (8), a top plate (9) supported by a support plate (10) above the mounting base plate (8), a slewing shaft (20) installed on the top plate (9), and a slewing drive assembly for driving the slewing shaft (20) to rotate. The swing drive includes a base plate (14) fixedly connected to the upper end of the slewing shaft (20), a swing shaft (17) installed on the base plate (14) using a bearing seat (15), a swing arm (4) fixedly installed on the swing shaft (17), the root of the swing arm (4) fixedly connected to the swing shaft (17), and a swing drive assembly for driving the swing shaft (17) to rotate. The platform cover plate (5) is fixedly connected to the swing arm (4), and when the swing arm (4) swings to a horizontal state, the platform cover plate (5) closes the platform window (6).

2. The stepless adjustment mechanism for the opening angle of the automatic cover plate of the wind turbine tower platform as described in claim 1, characterized in that: The rotary drive assembly includes a drive pulley (11) mounted on the mounting base plate (8) and a driven pulley (13) mounted on the lower end of the rotary shaft (20). The drive pulley (11) and the driven pulley (13) are located between the mounting base plate (8) and the top plate (9). A transmission belt (12) is provided between the drive pulley (11) and the driven pulley (13). The assembly also includes a rotary drive motor (2) that drives the drive pulley (11) to rotate. The rotary drive motor (2) is an AC variable frequency motor.

3. The stepless adjustment mechanism for the opening angle of the automatic cover plate of the wind turbine tower platform as described in claim 2, characterized in that: The slewing drive motor (2) is located below the mounting base plate (8). An installation window (1) is provided on the outside of the platform window (6) on the tower platform. The slewing drive motor (2) is located inside the installation window (1) and the mounting base plate (8) is fixedly connected to the tower platform with bolts.

4. The stepless adjustment mechanism for the opening angle of the automatic cover plate of the wind turbine tower platform as described in claim 3, characterized in that: The swing drive assembly includes a support base (18) mounted and fixed on a base plate (14), and a swing drive motor (3) is mounted and fixed on the support base (18). The output shaft of the swing drive motor (3) is connected to the shaft end of the swing shaft (17). The swing drive motor (3) is an AC variable frequency motor.

5. The stepless adjustment mechanism for the opening angle of the automatic cover plate of the wind turbine tower platform as described in claim 4, characterized in that: It also includes two swing angle detection probes (16) set at a circumferential interval of 90° for detecting the swing angle of the swing arm (4), one of which generates a detection signal when the swing arm (4) reaches the horizontal position and the other generates a detection signal when the swing arm (4) reaches the vertical position; it also includes two rotation angle detection probes (19) set at a circumferential interval of 180° for detecting the rotation angle, one of which generates a detection signal when the swing drive device rotates to the initial position and the other generates a detection signal when the swing drive device rotates to the avoidance position.

6. The stepless adjustment mechanism for the opening angle of the automatic cover plate of the wind turbine tower platform as described in claim 5, characterized in that: Both the swing angle detection probe (16) and the rotation angle detection probe (19) are proximity switches. One of the swing angle detection probes (16) is installed at the front of the bearing seat (15), and the other swing angle detection probe (16) is installed at the top of the bearing seat (15). The swing angle detection probe (16) generates a detection signal when the swing arm (4) approaches. One of the rotation angle detection probes (19) is installed at the front edge of the top plate (9), and the other rotation angle detection probe (19) is installed at the rear edge of the top plate (9). A metal block is installed at the bottom of the base plate (14). The rotation angle detection probe (19) generates a detection signal when the metal block approaches.

7. The stepless adjustment mechanism for the opening angle of the automatic cover plate of the wind turbine tower platform as described in claim 6, characterized in that: It also includes a field controller and two operating switches, one above and one below. The upper operating switch is located at the operating position above the tower platform, and the lower operating switch is located at the operating position below the tower platform. The operating switches, the slewing drive motor (2), the swing drive motor (3), the swing angle detection probe (16), and the rotation angle detection probe (19) are all connected to the field controller.

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