A cooling tower fan anti-reverse rotation device

Abstract

The utility model relates to cooling tower equipment technical field discloses a cooling tower fan anti -reverse rotation device, including support structure, fan assembly and anti -reverse structure, fan assembly and anti -reverse structure are installed on the support structure respectively, and the anti -reverse structure includes disc, fixed base, spring, screw rod and screw seat, and the outer wall of disc equidistance fixed setting first tooth stop, and the tooth stop lever is slidably installed in the fixed base, and the both ends of tooth stop lever are fixedly installed second tooth stop and fixed block respectively, and the fixed disc is fixedly installed on tooth stop lever, and the spring is covered on tooth stop lever, and the top of fixed block is provided with limit hole, and the screw rod is installed at the top of fixed base through screw seat, and the screw rod and limit hole are matched, and the top of screw rod is fixedly installed turntable. The utility model discloses the anti -reverse structure of setting, utilizes the structure design that first tooth stop and second tooth stop arc surface contact can pass through smoothly, and L type surface cannot retreat when resisting, can accurate prevent the reverse rotation of rotating shaft.

Description

Technical Field

[0001] This utility model relates to the field of cooling tower equipment technology, and in particular to a cooling tower fan anti-reverse rotation device. Background Technology

[0002] Cooling towers are widely used in industrial and civil applications. Their main function is to accelerate airflow through the rotation of a fan, achieving heat exchange between water and air to cool the circulating water. However, during actual operation, when the motor stops, the airflow inside the cooling tower's duct may reverse. This causes the fan impeller to rotate in the opposite direction under the influence of the airflow. This reverse rotation can not only disrupt the normal start-up and shutdown procedures but also damage the fan's motor and transmission components, reducing the equipment's lifespan and increasing maintenance costs.

[0003] Currently, some existing anti-reverse rotation devices on the market have complex structures, are inconvenient to install and maintain, and are costly, which cannot meet the actual needs of use. Therefore, it is of great practical significance to develop a device that is simple in structure, easy to install, low in cost, and can effectively prevent the fan from rotating in reverse. Utility Model Content

[0004] Given that some existing anti-reverse rotation devices on the market are complex in structure, inconvenient to install and maintain, and expensive, and cannot meet the actual needs of use, it is of great practical significance to develop a device that is simple in structure, easy to install, low in cost, and can effectively prevent the fan from rotating in reverse. Therefore, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a cooling tower fan anti-reverse rotation device, comprising a support structure, a fan assembly, and an anti-reverse structure. The fan assembly and the anti-reverse structure are respectively installed on the support structure. The anti-reverse structure includes a disc, a fixed seat, a spring, a screw, and a threaded seat. A first toothed stop is fixedly provided at equal intervals on the outer wall of the disc. A toothed stop rod is slidably installed in the fixed seat. A second toothed stop and a fixed block are respectively fixedly installed at both ends of the toothed stop rod. A fixed disc is fixedly installed on the toothed stop rod. The spring is sleeved on the toothed stop rod. A limit hole is provided at the top of the fixed block. The screw is installed at the top of the fixed seat through the threaded seat. The screw and the limit hole are compatible. A turntable is fixedly installed at the top of the screw.

[0006] As a preferred embodiment of the cooling tower fan anti-reverse rotation device of the present invention, the supporting structure includes a base frame, the middle of the base frame is provided with a cavity, and mounting holes are provided at the four corners of the base frame.

[0007] As a preferred embodiment of the cooling tower fan anti-reverse rotation device of the present invention, the fan assembly includes a fan duct and a motor. The fan duct is fixedly installed at the top of the base frame. A support frame is fixedly installed inside the fan duct. The motor is fixedly installed at the top of the support frame. The motor shaft of the motor passes through the support frame and extends to the bottom of the support frame. The motor shaft and the support frame are rotatably connected. A rotating shaft is fixedly connected to the motor shaft. Fan blades are fixedly installed on the rotating shaft.

[0008] As a preferred embodiment of the anti-reverse rotation device for the cooling tower fan of this utility model, the disc is fixedly installed on the rotating shaft, the fixed seat is fixedly installed on the inner wall of the fan duct, and one end of the toothed baffle is inside the fan duct, while the other end is outside the fan duct.

[0009] As a preferred embodiment of the cooling tower fan anti-reverse rotation device of the present invention, wherein: the second toothed baffle is fixedly installed at one end of the toothed baffle rod inside the wind duct, the fixing block is fixedly installed at the other end of the toothed baffle rod, the second toothed baffle and the first toothed baffle are adapted to each other, one side of the first toothed baffle and the second toothed baffle are set as arc surfaces, and the other side is set as L-shaped.

[0010] As a preferred embodiment of the cooling tower fan anti-reverse rotation device of this utility model, one end of the spring is fixedly connected to the fixed plate, and the other end is fixedly connected to the fixed seat. The threaded seat is fixedly installed on the top of the fixed seat, and the screw is threadedly installed on the threaded seat.

[0011] The beneficial effects of this utility model are:

[0012] 1. Through the anti-reverse structure, the design allows the first and second toothed blocks to pass smoothly when their arc surfaces are in contact, and prevents them from retracting when their L-shaped surfaces collide. This precisely prevents the shaft from rotating in reverse, effectively avoiding damage to the motor and transmission components caused by the fan's reverse rotation, and extending the equipment's service life. At the same time, the spring force ensures stable contact between the second and first toothed blocks. The overall structure is simple and the operation is stable.

[0013] 2. When the fan needs to be rotated in the forward direction and the wear of the parts needs to be reduced, the second tooth stop can be separated from the first tooth stop by pulling the fixed block and rotating the turntable to limit the fixed block of the screw, thus avoiding contact and wear. After use, simply rotate the turntable in the opposite direction to disengage the screw from the limit hole, and the tooth stop rod will automatically reset under the action of the spring force, so that the second tooth stop can enter the working state. The whole process is simple to operate. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the fan assembly of this utility model;

[0018] Figure 4 This is a schematic diagram of the anti-reverse structure of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Support structure; 11. Base frame; 12. Mounting hole; 2. Fan assembly; 201. Air duct; 202. Support frame; 203. Motor; 204. Rotating shaft; 205. Fan blade; 3. Anti-reverse structure; 301. Disc; 302. First tooth stop; 303. Fixed seat; 304. Tooth stop rod; 305. Second tooth stop; 306. Fixed plate; 307. Spring; 308. Fixed block; 309. Threaded seat; 310. Screw; 311. Turntable; 312. Limiting hole. Detailed Implementation

[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.

[0022] Example

[0023] Refer to attached figure Figure 1 - Appendix Figure 4This utility model provides a cooling tower fan anti-reverse rotation device, including a support structure 1, a fan assembly 2, and an anti-reverse structure 3. The fan assembly 2 and the anti-reverse structure 3 are respectively installed on the support structure 1. The support structure 1 includes a base frame 11 with a cavity in the middle and mounting holes 12 at the four corners. The fan assembly 2 includes a fan duct 201 and a motor 203. The fan duct 201 is fixedly installed on the top of the base frame 11, and a support frame 202 is fixedly installed inside the fan duct 201. The motor 203 is fixedly installed on the top of the support frame 202, and the motor shaft of the motor 203 extends through the support frame 202 to below it. The motor shaft of the motor 203 is rotatably connected to the support frame 202. A rotating shaft 204 is fixedly connected to the motor shaft of the motor 203, and fan blades 205 are fixedly installed on the rotating shaft 204.

[0024] The anti-reverse structure 3 includes a disc 301, a fixed base 303, a spring 307, and a threaded seat 309. The disc 301 is fixedly mounted on the rotating shaft 204. Four first toothed stops 302 are fixedly arranged at equal intervals on the outer wall of the disc 301. The fixed base 303 is fixedly mounted on the inner wall of the air duct 201. A toothed rod 304 is slidably mounted inside the fixed base 303. One end of the toothed rod 304 is inside the air duct 201, and the other end is outside the air duct 201. A second toothed stop 305 is fixedly mounted on the end of the toothed rod 304 inside the air duct 201. The second toothed stop 305 is compatible with the first toothed stops 302. 02. One side of the second tooth stop 305 is set as an arc surface, and the other side is set as an L shape. A fixing plate 306 is fixedly installed on the tooth stop rod 304. A spring 307 is sleeved on the tooth stop rod 304. One end of the spring 307 is fixedly connected to the fixing plate 306, and the other end is fixedly connected to the fixing seat 303. A fixing block 308 is fixedly installed on the end of the tooth stop rod 304 away from the second tooth stop 305. A limit hole 312 is provided at the top of the fixing block 308. A threaded seat 309 is fixedly installed at the top of the fixing seat 303. A screw 310 is threadedly installed on the threaded seat 309. The screw 310 is adapted to the limit hole 312. A turntable 311 is fixedly installed at the top of the screw 310.

[0025] During use, when needed, the fixed block 308 is pulled, causing the toothed stop 304 to slide in the fixed seat 303, while the spring 307 is compressed, causing the second toothed stop 305 to separate from the first toothed stop 302. Then, the turntable 311 is rotated, causing the screw 310 to rotate, so that the screw 310 moves in the threaded seat 309, thereby causing the end of the screw 310 to extend into the limiting hole 312 to limit the fixed block 308. When the motor 203 drives the rotating shaft 204 to rotate forward, the disc 301 fixed on the rotating shaft 204 rotates accordingly, preventing the first toothed stop 302 and the second toothed stop 305 from contacting each other and reducing wear.

[0026] After use, turn off the motor 203 and rotate the turntable 311, causing the screw 310 to disengage from the limiting hole 312. The toothed stop 304 automatically resets under the elastic force of the spring 307, causing the second toothed stop 305 to contact the first toothed stop 302. The arc surface of the first toothed stop 302 contacts the arc surface of the second toothed stop 305, which pushes the toothed stop 304 to compress the spring 307 and slide outward, allowing the first toothed stop 302 to pass smoothly. When the rotating shaft 204 shows a tendency to reverse, the L-shaped surface of the first toothed stop 302 abuts against the L-shaped surface of the second toothed stop 305, preventing the second toothed stop 305 from retracting, thereby preventing the disc 301 and the rotating shaft 204 from reversing, and realizing the anti-reverse rotation function.

[0027] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for preventing reverse rotation of a cooling tower fan, characterized in that: The system includes a support structure (1), a fan assembly (2), and an anti-reverse structure (3). The fan assembly (2) and the anti-reverse structure (3) are respectively installed on the support structure (1). The anti-reverse structure (3) includes a disc (301), a fixed seat (303), a spring (307), a screw (310), and a threaded seat (309). The outer wall of the disc (301) is fixedly provided with first toothed stops (302) at equal intervals. A toothed stop rod (304) is slidably installed in the fixed seat (303). The toothed stop rod (304) has two... The second toothed stop (305) and the fixing block (308) are fixedly installed at the ends respectively. The fixing plate (306) is fixedly installed on the toothed stop rod (304). The spring (307) is sleeved on the toothed stop rod (304). The top end of the fixing block (308) is provided with a limit hole (312). The screw (310) is installed on the top end of the fixing seat (303) through the threaded seat (309). The screw (310) and the limit hole (312) are compatible. The top end of the screw (310) is fixedly installed with a turntable (311).

2. The anti-reverse rotation device for cooling tower fans according to claim 1, characterized in that: The support structure (1) includes a base frame (11), the middle of which is hollow, and mounting holes (12) are provided at the four corners of the base frame (11).

3. The anti-reverse rotation device for cooling tower fans according to claim 2, characterized in that: The fan assembly (2) includes a fan duct (201) and a motor (203). The fan duct (201) is fixedly installed at the top of the base frame (11). A support frame (202) is fixedly installed inside the fan duct (201). The motor (203) is fixedly installed at the top of the support frame (202). The motor shaft of the motor (203) passes through the support frame (202) and extends to the bottom of the support frame (202). The motor shaft of the motor (203) and the support frame (202) are rotatably connected. A rotating shaft (204) is fixedly connected to the motor shaft of the motor (203). Fan blades (205) are fixedly installed on the rotating shaft (204).

4. The anti-reverse rotation device for cooling tower fans according to claim 1, characterized in that: The disc (301) is fixedly mounted on the rotating shaft (204), the fixing seat (303) is fixedly mounted on the inner wall of the air duct (201), one end of the toothed rod (304) is inside the air duct (201), and the other end is outside the air duct (201).

5. The anti-reverse rotation device for cooling tower fans according to claim 4, characterized in that: The second toothed stop (305) is fixedly installed at one end of the toothed stop rod (304) inside the air duct (201), and the fixing block (308) is fixedly installed at the other end of the toothed stop rod (304). The second toothed stop (305) and the first toothed stop (302) are adapted to each other. One side of the first toothed stop (302) and the second toothed stop (305) is set as an arc surface, and the other side is set as an L-shape.

6. The anti-reverse rotation device for cooling tower fans according to claim 5, characterized in that: One end of the spring (307) is fixedly connected to the fixed plate (306), and the other end is fixedly connected to the fixed seat (303). The threaded seat (309) is fixedly installed on the top of the fixed seat (303), and the screw (310) is threadedly installed on the threaded seat (309).

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