Noise reduction structure for cooling tower

Abstract

The utility model relates to the technical field of cooling towers, in particular to a noise reduction structure for a cooling tower, which is characterized in that a base is communicated with an air duct, a sleeve connected to the base is sleeved outside the air duct, and a plurality of damping mechanisms are annularly arrayed on the peripheral wall of the sleeve; the damping mechanism comprises a box fixedly connected to the outer wall of the sleeve, a straight plate is arranged in the box, one end of the straight plate movably penetrates through the sleeve to be connected with an arc-shaped plate, a compression spring is arranged between the arc-shaped plate and the sleeve, the concave face of the arc-shaped plate makes contact with the outer wall of the air duct, a rectangular hole is formed in the straight plate, and a plurality of teeth are arranged on the bottom face of the rectangular hole. The gear teeth are provided with meshed gears, screw rods with opposite thread turning directions are fixed to the two sides of the gears, the two screw rods are in threaded connection and penetrate through friction plates respectively, and the ends, away from each other, of the two screw rods are rotationally connected to the box body respectively. According to the utility model, the noise can be reduced, the vibration of the air duct can be reduced, and the situation that bolts for fixing fall off due to long-time vibration and shutdown is needed due to frequent replacement of sound insulation cotton can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology for cooling towers, and in particular to a noise reduction structure for cooling towers. Background Technology

[0002] Cooling tower noise refers to the eddy current and rotation noise generated during the intake and exhaust process of the fan when the cooling tower is running. Since cooling towers are mostly used in places with high traffic or residential areas, the noise pollution they cause during operation affects the rest of the surrounding people. Therefore, it is necessary to use a fan duct to reduce the noise of the cooling tower.

[0003] Most existing noise reduction ducts achieve noise isolation by using sound-absorbing cotton material installed on the side walls of the duct, and are mainly fixed by bolts. However, in practical applications, when noise enters the duct, it causes the duct itself to vibrate. This vibration affects the fixing bolts, causing them to gradually loosen or even fall off, thus affecting the stability of the equipment. Furthermore, when the sound-absorbing cotton material is in a high-temperature, humid, or dusty environment, the aging rate of the sound-absorbing cotton material will be accelerated, requiring frequent replacement and leading to downtime, which affects production efficiency. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the existing technology, the purpose of this utility model is to provide a noise reduction structure for cooling towers, which can reduce the noise of the air duct, reduce the vibration of the air duct, prevent the fixing bolts from falling off due to long-term vibration, and prevent the frequent replacement of sound insulation cotton from causing downtime and affecting production efficiency.

[0005] The technical solution of this utility model is: it includes a base, on which a wind duct is connected, and a sleeve connected to the base is fitted on the outside of the wind duct. Multiple shock-absorbing mechanisms are arranged in a ring on the peripheral wall of the sleeve.

[0006] The shock absorption mechanism includes a housing fixedly connected to the outer wall of the sleeve. A straight plate is provided inside the housing. One end of the straight plate movably passes through the sleeve and connects to an arc-shaped plate. A compression spring is provided between the arc-shaped plate and the sleeve. The concave surface of the arc-shaped plate contacts the outer wall of the air duct. A rectangular hole is opened on the straight plate. Multiple teeth are provided on the bottom surface of the rectangular hole. Gears mesh on the teeth. Screws with opposite threads are fixed on both sides of the gears. Friction plates are threadedly connected to and pass through the two screws respectively. The ends of the two screws that are far apart are rotatably connected to the housing respectively.

[0007] This invention has a simple structure, can reduce the vibration of the ventilation duct, does not require shutdown, has a good noise reduction effect, and improves work efficiency. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Figure 2 This is a sectional top view of the present invention (straight plate not sectionalized).

[0010] Figure 3 This is a schematic diagram of the connection between the straight plate, friction plate, and gear of this utility model.

[0011] The attached diagram is labeled as follows: 1. Base, 2. Air duct, 3. Sleeve, 4. Box body, 5. Friction plate, 6. Compression spring, 7. Straight plate, 8. Rectangular hole, 9. Tooth, 10. Gear, 11. Screw, 12. Arc plate. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0013] like Figures 1-3 As shown, a noise reduction structure for a cooling tower includes a base 1, which is annular. A duct 2 is connected to the base 1. A sleeve 3 connected to the top surface of the base 1 is fitted around the duct 2. The sleeve 3 is a hollow cylinder with openings at the top and bottom. Multiple shock-absorbing mechanisms are arranged in a ring on the periphery of the sleeve 3.

[0014] The shock absorption mechanism includes a housing 4 fixedly connected to the outer wall of the sleeve 3. A straight plate 7 is provided inside the housing 4. The straight plate 7 is a vertical plate. One end of the straight plate 7 movably passes through the sleeve 3 and connects to an arc-shaped plate 12. A compression spring 6 is provided between the arc-shaped plate 12 and the sleeve 3. The compression spring 6 is located on both sides of the straight plate 7. The concave surface of the arc-shaped plate 12 contacts the outer wall of the air duct 2. A rectangular hole 8 is provided on the straight plate 7. Multiple teeth 9 are provided on the bottom surface of the rectangular hole 8 along the length direction of the rectangular hole 8. Gears 10 meshing with each other are provided on the teeth 9. Screws 11 with opposite threads are fixed on both sides of the gears 10. Friction plates 5 are threadedly connected to and pass through the two screws 11 respectively. The two friction plates 5 are located on both sides of the straight plate 7. The straight plate 7 and the friction plates 5 are parallel to each other. The ends of the two screws 11 that are far apart are rotatably connected to the housing 4 respectively.

[0015] There are 4 shock absorption mechanisms. The housing 4 of the shock absorption mechanism is a cuboid. One end and the top of the housing 4 are open. One end of the housing 4 is fixed to the outer wall of the sleeve 3. The top opening of the housing 4 is provided with a cover plate.

[0016] The arc plate 12 is an arc plate whose inner arc surface matches the arc of the outer wall of the sleeve 3, and a rubber layer is provided on the inner wall of the arc plate 12.

[0017] When the compression spring 6 is in its natural state, there is a gap A between the two friction plates 5 and the straight plate 7, and a gap B between the opposite side of the two friction plates 5 and the corresponding side wall of the box 4. The gap B is at least twice the gap A, and the gap A is 2-3 mm.

[0018] The height of the friction plate 5 is equal to the height of the straight plate 7. The end of the friction plate 5 away from the sleeve 3 slides in contact with the side wall of the opposite box 4, and the bottom of the friction plate 5 slides in contact with the bottom surface of the box 4.

[0019] The bottom of the straight plate 7 slides in contact with the bottom surface of the inner box 4. There is a gap C between the end of the straight plate 7 away from the sleeve 3 and the opposite side wall of the box 4. The gap C is equal to the gap B.

[0020] In use, the base of this application is installed on the top of the cooling tower. After noise enters the inside of the air duct 2, high-frequency vibration occurs on the side wall of the air duct 2. Through the multiple arc-shaped plates 12 set on the side wall of the air duct 2, the vibration can be transmitted to the damping mechanism in the corresponding direction. After the vibration is transmitted to the compression spring 6, the vibration energy is absorbed by the elastic deformation of the compression spring 6, thereby reducing the vibration amplitude. When the compression spring 6 is compressed due to elastic deformation, it drives the straight plate 7 to move towards the outer end of the box. The teeth 9 move synchronously with the straight plate 7, drive the gear 10 to rotate, drive the screw 11 to rotate synchronously, and then drive the two friction plates 5 to move closer to the straight plate 7 until they form a clamping state on the straight plate 7, thereby converting the vibration energy into internal energy and consuming the vibration energy, thus reducing the noise. When the vibration stops, the compression spring 6 resets under the action of elasticity, driving the straight plate 7 and the friction plate 5 back to the initial state.

[0021] The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Any equivalent or equivalent modifications or substitutions to the technical solutions of the present utility model without departing from the spirit of the present utility model or the scope of disclosure shall fall within the protection scope of the present utility model.

Claims

1. A noise reduction structure for a cooling tower, characterized in that, Includes a base (1), on which a duct (2) is connected, and a sleeve (3) connected to the base (1) is fitted on the outside of the duct (2), and multiple shock-absorbing mechanisms are arranged in a ring on the periphery of the sleeve (3). The shock absorption mechanism includes a box (4) fixedly connected to the outer wall of the sleeve (3). A straight plate (7) is provided inside the box (4). One end of the straight plate (7) is movably connected through the sleeve (3) to the arc plate (12). A compression spring (6) is provided between the arc plate (12) and the sleeve (3). The concave surface of the arc plate (12) contacts the outer wall of the air duct (2). A rectangular hole (8) is provided on the straight plate (7). Multiple teeth (9) are provided on the bottom surface of the rectangular hole (8). A meshing gear (10) is provided on the teeth (9). Screws (11) with opposite threads are fixed on both sides of the gear (10). Friction plates (5) are threadedly connected to the two screws (11) respectively. The ends of the two screws (11) that are far apart are rotatably connected to the box (4).

2. The noise reduction structure for a cooling tower according to claim 1, characterized in that, There are 4 shock-absorbing mechanisms. The housing (4) of the shock-absorbing mechanism is a cuboid. One end and the top of the housing (4) are open. One end of the housing (4) is fixed to the outer wall of the sleeve (3). The top opening of the housing (4) is provided with a cover plate.

3. The noise reduction structure for a cooling tower according to claim 1, characterized in that, The arc plate (12) is an arc plate body whose inner arc surface matches the arc of the outer wall of the sleeve (3), and a rubber layer is provided on the inner wall of the arc plate (12).

4. The noise reduction structure for a cooling tower according to claim 1, characterized in that, There is a gap A between the two friction plates (5) and the straight plate (7), and there is a gap B between the opposite side of the two friction plates (5) and the corresponding side wall of the box (4). The gap B is at least twice the gap A, and the gap A is 2-3 mm.

5. A noise reduction structure for a cooling tower according to claim 1, characterized in that, The height of the friction plate (5) is equal to the height of the straight plate (7). The end of the friction plate (5) away from the sleeve (3) slides in contact with the side wall of the opposite box (4). The bottom of the friction plate (5) slides in contact with the inner bottom surface of the box (4).

6. The noise reduction structure for a cooling tower according to claim 1, characterized in that, The bottom of the straight plate (7) slides in contact with the bottom surface of the inner box (4), and there is a gap C between the end of the straight plate (7) away from the sleeve (3) and the opposite side wall of the box (4).

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