Fan tower hoist safety device

Abstract

The utility model provides fan tower section elevator safety device, including the guide rail mechanism of fixed in the tower section inner wall, the guide rail structure sliding connection lift box, be equipped with drive mechanism between lift box and guide rail structure, drive mechanism drive lift box along guide rail structure and brake, the number of guide rail mechanism is two, and the guide rail mechanism includes first guide bar and second guide bar, be equipped with a plurality of connecting blocks between first guide bar and second guide bar, and connecting block is fixedly connected with tower section inner wall, first guide bar is equipped with rack, and drive mechanism is connected with first guide bar transmission. The utility model can realize quick brake when appearing falling breakdown again, effectively prevent the falling of lift box, guarantee the personal safety of overhauling personnel, and higher security, can guarantee the stability of lift box in the process of lifting, reduce the shaking in the process of lifting, and higher security.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine tower hoisting technology, and specifically to a safety device for wind turbine tower hoisting. Background Technology

[0002] A wind turbine tower is a tower-shaped structure that supports a wind turbine generator. It is mainly made of steel and is used to connect the wind turbine generator to the foundation ring and to lift the generator to a high altitude to capture wind energy. A wind turbine tower lift is a device used for transporting personnel inside the wind turbine tower, mainly for vertical transportation needs during tower installation, maintenance, and repair.

[0003] In wind farms, wind turbine towers are typically quite tall, and maintenance personnel need to move up and down inside the tower using elevators to perform equipment inspections and maintenance. Due to the limited space inside the wind turbine tower and the need for the elevators to carry personnel and tools, their safe operation is of paramount importance.

[0004] Wind turbine tower hoists typically use a rack and pinion drive to control the vertical movement of their lifting boxes, and employ control equipment to monitor their operational status. In case of problems, they are electrically controlled to brake, thus providing a safety measure. However, in actual use, control failures are common, resulting in poor safety performance. Furthermore, existing safety mechanisms have slow response times, making it difficult to quickly apply brakes in emergencies and failing to effectively protect the safety of maintenance personnel. Utility Model Content

[0005] The main purpose of this utility model is to provide a safety device for wind turbine tower hoisting, and to solve the problem of safety hazards in the braking of wind turbine tower hoisting.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] The safety device for the wind turbine tower hoist includes a guide rail mechanism fixed to the inner wall of the tower.

[0008] The guide rail mechanism slides to connect the lifting box;

[0009] A drive mechanism is provided between the lifting box and the guide rail mechanism; the drive mechanism drives the lifting box to move up and down and brake along the guide rail mechanism.

[0010] In the preferred embodiment, there are two guide rail mechanisms, each including a first guide rod and a second guide rod.

[0011] Several connecting blocks are provided between the first guide rod and the second guide rod, and the connecting blocks are fixedly connected to the inner wall of the tower.

[0012] The first guide rod is equipped with a rack;

[0013] The drive mechanism is connected to the first guide rod via transmission.

[0014] In a preferred embodiment, the drive mechanism includes a fixed base that is fixedly connected to the lifting box;

[0015] The mounting base is equipped with a first motor;

[0016] The output shaft of the first motor is equipped with a drive gear; the drive gear meshes with a rack.

[0017] In the preferred embodiment, racks are provided on both sides of the first guide rod;

[0018] The drive gear meshes with one of the racks.

[0019] In the preferred embodiment, the mounting base is equipped with a safety mechanism for safety protection.

[0020] In a preferred embodiment, the safety mechanism includes a connecting arm that is hinged to the fixed base via a pivot.

[0021] The end of the connecting arm away from the fixed base is equipped with a telescopic movable arm;

[0022] A connecting plate is provided at the end of the movable arm away from the fixed base;

[0023] The connecting plate is equipped with a second motor, and the output shaft of the second motor is equipped with a stabilizing gear;

[0024] The stabilizing gear meshes with another rack;

[0025] A fixing arm is provided at the top of the connecting arm;

[0026] A locking block is provided on the side of the fixed arm near the rack.

[0027] In a preferred embodiment, the movable arm slides into the interior of the connecting arm;

[0028] A spring is provided at one end of the movable arm located inside the connecting arm;

[0029] One end of the spring is fixedly connected to the movable arm, and the other end is fixedly connected to the connecting arm.

[0030] In the preferred embodiment, the first guide rod and the second guide rod are arranged in parallel.

[0031] In the preferred embodiment, a stabilizing mechanism is provided between the lifting box and the second guide rod;

[0032] The stabilizing mechanism ensures that the lifting box moves up and down steadily along the second guide rod.

[0033] In a preferred embodiment, the stabilizing mechanism includes a fixed plate that is fixedly connected to the lifting box;

[0034] The side of the fixing plate is provided with several fixing shafts;

[0035] The fixed shaft is equipped with guide wheels via bearings;

[0036] The guide wheels are distributed on both sides of the second guide rod and abut against the second guide rod.

[0037] This utility model provides a safety device for a wind turbine tower hoist. By adopting the above solution, the following beneficial effects are achieved:

[0038] 1. In the event of a fall failure, it can achieve rapid braking, effectively preventing the lifting box from falling and ensuring the personal safety of maintenance personnel, thus enhancing safety.

[0039] 2. It can ensure the stability of the lifting box during the lifting process, reduce shaking during the lifting process, and make it safer.

[0040] 3. In the event of a fall failure, the mechanical structure provides a rapid response, further enhancing safety during braking. Attached Figure Description

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0042] Figure 1 This is a schematic diagram of the structure of this utility model;

[0043] Figure 2 This is a schematic diagram of the structure of this utility model;

[0044] Figure 3 This is a side view of the present invention;

[0045] Figure 4 This is an enlarged schematic diagram of the drive mechanism described in this utility model;

[0046] Figure 5 An enlarged schematic diagram of the drive mechanism described in this utility model;

[0047] Figure 6 This is a cross-sectional view of the connecting arm described in this utility model.

[0048] In the picture:

[0049] Lifting box 1, guide rail mechanism 2, connecting block 201, first guide rod 202, rack 203, second guide rod 204, drive mechanism 3, fixed seat 301, first motor 302, drive gear 303, stabilizing mechanism 4, fixed plate 401, fixed shaft 402, guide wheel 403, safety mechanism 5, connecting arm 501, movable arm 502, connecting plate 503, second motor 504, stabilizing gear 505, fixed arm 506, locking block 507, spring 508, rotating shaft 509. Detailed Implementation

[0050] In the embodiments of this application, such as Figure 1 , 2 As shown in Figures 3, 4, 5 and 6, the safety device for the wind turbine tower hoist includes a guide rail mechanism 2 fixed to the inner wall of the tower. The guide rail mechanism 2 is slidably connected to the lifting box 1. The lifting box 1 is a box structure used to carry maintenance personnel and tools. It is made of welded steel plates and has handrails and safety guardrails inside.

[0051] A drive mechanism 3 is provided between the lifting box 1 and the guide rail mechanism 2. The drive mechanism 3 drives the lifting box 1 to move up and down and brake along the guide rail mechanism 2.

[0052] Specifically, there are two guide rail mechanisms 2, located at both ends on the same side of the lifting box 1. Each guide rail mechanism 2 includes a first guide rod 202 and a second guide rod 204. Both the first guide rod 202 and the second guide rod 204 are made of high-strength alloy steel, and their lengths are adapted to the height of the wind turbine tower. The first guide rod 202 and the second guide rod 204 are arranged in parallel, and several connecting blocks 201 are provided between them. The connecting blocks 201 are rectangular metal blocks, which are fixedly connected to the inner wall of the tower by expansion bolts. At the same time, the connecting blocks 201 are fixed to the first guide rod 202 and the second guide rod 204 by welding to ensure the stability of the position of the first guide rod 202 and the second guide rod 204.

[0053] The first guide rod 202 is equipped with a rack 203, which is fixed to the side of the first guide rod 202 by welding or bolting. The drive mechanism 3 is connected to the first guide rod 202 to realize the lifting drive of the lifting box 1.

[0054] Specifically, the drive mechanism 3 includes a fixed base 301 fixedly connected to the lifting box 1. The fixed base 301 is a metal frame structure and is fixedly connected to the side of the lifting box 1 by bolts. The fixed base 301 is equipped with a first motor 302, which is a three-phase asynchronous motor with braking function, and is fixed to the fixed base 301 by a motor bracket.

[0055] The output shaft of the first motor 302 is equipped with a drive gear 303. The drive gear 303 meshes with a rack 203 on one side of the first guide rod 202. By starting the first motor 302, the drive gear 303 is driven to rotate. The drive gear 303 moves along the rack 203, thereby causing the lifting box 1 to rise and fall along the first guide rod 202.

[0056] Furthermore, racks 203 are provided on both sides of the first guide rod 202, and the two racks 203 are arranged in parallel, with the drive gear 303 meshing with one of the racks 203.

[0057] The fixed base 301 is equipped with a safety mechanism 5 to provide safety protection during the operation of the elevator. The safety mechanism 5 includes a connecting arm 501 that is hinged to the fixed base 301 via a rotating shaft 509; specifically, the end of the connecting arm 501 is fixed with a rotating shaft 509, and the fixed base 301 has a rotating shaft hole, with the rotating shaft 509 connected to the inside of the rotating shaft hole via a bearing; preferably, an angle sensor is provided, connected to the control unit of the existing wind turbine tower elevator, to detect the rotation of the rotating shaft 509.

[0058] The end of the connecting arm 501 away from the fixed base 301 is provided with a telescopic movable arm 502. The movable arm 502 slides into the interior of the connecting arm 501. The end of the movable arm 502 located inside the connecting arm 501 is provided with a spring 508. One end of the spring 508 is fixedly connected to the movable arm 502, and the other end is fixedly connected to the connecting arm 501. The spring 508 is a tension spring.

[0059] The end of the movable arm 502 away from the fixed base 301 is provided with a connecting plate 503. The connecting plate 503 is a metal plate and is fixedly connected to the movable arm 502 by bolts.

[0060] The connecting plate 503 is equipped with a second motor 504, which is a small servo motor and is fixed to the connecting plate 503 by a motor mount. The output shaft of the second motor 504 is equipped with a stabilizing gear 505, which meshes with the rack 203 on the other side of the first guide rod 202. The second motor 504 drives the stabilizing gear 505 to move along the rack 203. The transmission direction, speed and time of the stabilizing gear 505 are the same as those of the driving gear 303. Thus, during the lifting control process of this application, the stabilizing gear 505 and the driving gear 303 move synchronously, thereby keeping the angle of the movable arm 502 and the connecting arm 501 unchanged.

[0061] A fixed arm 506, a metal rod, is welded and fixed to the top of the connecting arm 501. A locking block 507, a wear-resistant metal block, is located on the side of the fixed arm 506 near the rack 203. The locking block 507 is matched to the tooth profile of the rack 203. In an emergency, such as a sudden failure of the first motor 302 or a rapid descent of the lifting box 1, the stabilizing gear 505 maintains its original speed. A speed difference between the stabilizing gear 505 and the drive gear 303 causes the connecting arm 501, the movable arm 502, and the fixed arm 506 to rotate as a whole, causing the locking block 507 to engage with the teeth of the rack 203, thus achieving emergency braking of the lifting box 1. After braking, the rotation angle sensor on the rotating shaft 509 detects the rotation signal. The existing elevator controller receives the signal, controls the first motor 302 and the second motor 504 to stop working, and issues an alarm signal in an existing manner.

[0062] After the staff completes the inspection and troubleshooting, the second motor 504 is started to drive the stabilizing gear 505 to rotate, which eventually causes the connecting arm 501, the movable arm 502 and the fixed arm 506 to rotate back to the working angle, and then the work can continue.

[0063] A stabilizing mechanism 4 is provided between the lifting box 1 and the second guide rod 204. The stabilizing mechanism 4 ensures that the lifting box 1 rises and falls stably along the second guide rod 204, preventing the lifting box 1 from shaking during operation. Specifically, the stabilizing mechanism 4 includes a fixing plate 401 fixedly connected to the lifting box 1. The fixing plate 401 is a metal plate and is fixedly connected to the side of the lifting box 1 by bolts. The side of the fixing plate 401 is provided with several fixing shafts 402. The fixing shafts 402 are metal shafts, which are set perpendicular to the fixing plate 401 and welded to it. The number is preferably 4-6, symmetrically distributed on both sides of the second guide rod 204.

[0064] The fixed shaft 402 is equipped with guide wheels 403 via bearings. The guide wheels 403 are preferably made of polyurethane material, which has good wear resistance and elasticity. The guide wheels 403 are distributed on both sides of the second guide rod 204 and abut against the side of the second guide rod 204. Through the rolling contact between the guide wheels 403 and the second guide rod 204, the lateral movement of the lifting box 1 is restricted, ensuring its operational stability.

[0065] In normal use, the existing braking mechanism can still be used for protection. This application is mainly used for emergency protection in case of stall, adding an extra layer of safety protection and making it safer to use.

[0066] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A safety device for a wind turbine tower hoist, characterized by: Includes a guide rail mechanism (2) fixed to the inner wall of the tower. The guide rail mechanism (2) slides to connect the lifting box (1); A drive mechanism (3) is provided between the lifting box (1) and the guide rail mechanism (2); the drive mechanism (3) drives the lifting box (1) to rise and fall and brake along the guide rail mechanism (2).

2. The safety device for the wind turbine tower hoist according to claim 1, characterized in that: There are two guide rail mechanisms (2), which include a first guide rod (202) and a second guide rod (204). Several connecting blocks (201) are provided between the first guide rod (202) and the second guide rod (204), and the connecting blocks (201) are fixedly connected to the inner wall of the tower. The first guide rod (202) is equipped with a rack (203); The drive mechanism (3) is connected to the first guide rod (202) in a transmission connection.

3. The safety device for the wind turbine tower hoist according to claim 2, characterized in that: The drive mechanism (3) includes a fixed seat (301) that is fixedly connected to the lifting box (1); The mounting base (301) is equipped with a first motor (302); The output shaft of the first motor (302) is provided with a drive gear (303); the drive gear (303) meshes with the rack (203).

4. The safety device for the wind turbine tower hoist according to claim 3, characterized in that: The first guide rod (202) has racks (203) on both sides; The drive gear (303) meshes with one of the racks (203).

5. The safety device for the wind turbine tower hoist according to claim 4, characterized in that: The mounting base (301) is equipped with a safety mechanism (5) for safety protection.

6. The safety device for the wind turbine tower hoist according to claim 5, characterized in that: The safety mechanism (5) includes a connecting arm (501) hinged to a fixed base (301) via a pivot (509); The connecting arm (501) has a telescopic movable arm (502) at the end away from the fixed base (301); A connecting plate (503) is provided at the end of the movable arm (502) away from the fixed base (301); The connecting plate (503) is equipped with a second motor (504), and the output shaft of the second motor (504) is equipped with a stabilizing gear (505). The stabilizing gear (505) meshes with another rack (203); The top of the connecting arm (501) is provided with a fixing arm (506). The fixed arm (506) has a locking block (507) on the side near the rack (203).

7. The safety device for the wind turbine tower hoist according to claim 6, characterized in that: The movable arm (502) slides into the interior of the connecting arm (501); The movable arm (502) has a spring (508) at one end inside the connecting arm (501); One end of the spring (508) is fixedly connected to the movable arm (502), and the other end is fixedly connected to the connecting arm (501).

8. The safety device for the wind turbine tower hoist according to claim 2, characterized in that: The first guide rod (202) and the second guide rod (204) are arranged in parallel.

9. The safety device for the wind turbine tower hoist according to claim 2, characterized in that: A stabilizing mechanism (4) is provided between the lifting box (1) and the second guide rod (204); The stabilizing mechanism (4) ensures that the lifting box (1) moves up and down stably along the second guide rod (204).

10. The wind turbine tower hoist safety device according to claim 9, characterized in that: it is stable. The mechanism (4) includes a fixed plate (401) that is fixedly connected to the lifting box (1); The side of the fixing plate (401) is provided with several fixing shafts (402); The fixed shaft (402) is equipped with a guide wheel (403) via a bearing; The guide wheels (403) are distributed on both sides of the second guide rod (204) and abut against the second guide rod (204).

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