Cooling tower noise reduction type composite air duct structure

Abstract

The utility model discloses a cooling tower noise reduction type composite air duct structure relates to cooling tower accessory technical field, including air duct body, the air duct body includes the cylinder base, the inside wall of the top of cylinder base is equipped with the threaded mounting, and the threaded connection has the noise reduction cylinder middle section, the top of noise reduction cylinder middle section is equipped with the joint installation mouth, and has the cylinder top cover of joint, the cylinder wall fixed connection of noise reduction cylinder middle section has the limit ring plate, the outer wall of cylinder top cover has the dustproof filter cover of sleeve joint, be equipped with the limiting mechanism between dustproof filter cover and limit ring plate. The utility model provides the air duct body, avoids dust to enter inside to cause the blockage influence service life to noise reduction component under the basis of realizing the noise reduction, thereby solves the existing cooling tower composite air duct when running can produce the noise pollution of noise, and dust is easy to enter the air duct inside and block the noise reduction component aperture, reduces the sound absorption effect problem.

Description

Technical Field

[0001] This utility model relates to the technical field of cooling tower accessories, specifically to a noise-reducing composite air duct structure for cooling towers. Background Technology

[0002] The composite duct structure of a cooling tower is a duct structure composed of different materials (such as fiberglass and metal, concrete, etc.) that improves airflow efficiency, enhances mechanical properties and durability through optimized structural design.

[0003] When existing cooling tower composite ducts are in use, the high-speed operation of the fan generates strong aerodynamic noise. At the same time, the impact of the water flow inside the cooling tower and the operation of the circulating water pump also generate noise. These noises are superimposed, forming a significant noise pollution that seriously interferes with the normal life and work order of residents. Moreover, since cooling towers are usually installed outdoors, dust, particulate matter, and other impurities in the surrounding air can easily enter the interior of the duct at the air outlet when it is not in operation. They not only adhere to the inner wall of the duct, but more seriously, they can enter the internal noise reduction components, such as sound-absorbing cotton and sound-absorbing panels. Dust covering the surface of the noise reduction components can block the pores of the sound-absorbing materials, reduce their sound absorption effect, and prevent the noise reduction components from functioning effectively, thus causing a significant decrease in the overall noise reduction capability of the cooling tower. Summary of the Invention

[0004] In view of the problems existing in the current noise reduction composite air duct structure of a cooling tower, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a noise-reducing composite air duct structure for cooling towers, which solves the problems of noise pollution caused by the noise generated during the operation of existing composite air ducts for cooling towers, and the problem that dust can easily enter the air duct and block the pores of the noise reduction components, thus reducing the sound absorption effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A noise-reducing composite duct structure for cooling towers includes a duct body, the duct body including a duct base, the inner side wall of the top of the duct base having a threaded mounting port and a noise-reducing duct middle section threadedly connected thereto, the top of the noise-reducing duct middle section having a snap-fit ​​mounting port and a duct top cover snap-fitted thereto, a limiting annular plate fixedly connected to the duct wall of the noise-reducing duct middle section, a dustproof filter cover sleeved on the outer wall of the duct top cover, and a limiting mechanism provided between the dustproof filter cover and the limiting annular plate;

[0008] The top of the middle section of the noise reduction cylinder has an air outlet and is fixedly connected to multiple support plates. The bottom of the cylinder top cover is fixedly connected to an arc-shaped flow guide buffer plate. The bottom of the arc-shaped flow guide buffer plate is fixedly connected to an airflow noise reduction plate through an installation mechanism. The cavity of the cylinder top cover is filled with a polyurethane foam layer. The top of the cylinder top cover has an arc-shaped surface and is fixedly connected to lifting lugs at both ends.

[0009] Preferably, the limiting mechanism includes positioning bolts, positioning ports, and limiting nuts. Positioning bolts are fixedly connected to the bottom four sides of the dust filter cover, and positioning ports are opened on the top four sides of the limiting annular plate. Each positioning bolt passes through the corresponding positioning port and is threadedly connected to a limiting nut.

[0010] Preferably, the installation mechanism includes a limiting rod, a limiting plate, a threaded limiting port, and a limiting bolt. The bottom of the arc-shaped flow guide buffer plate is fixedly connected to the limiting rod. One end of the limiting rod passes through the airflow noise reduction plate and is inserted into the limiting plate. The side walls of the limiting plate and the limiting rod are provided with corresponding threaded limiting ports, and the limiting bolts are threadedly connected to them.

[0011] Preferably, the cylindrical base includes a high-strength annular base, and a shock-absorbing rubber ring is fixedly connected to the bottom of the high-strength annular base.

[0012] Furthermore, the middle section of the noise reduction cylinder includes a high-strength FRP outer layer, a honeycomb noise reduction pad layer is fixedly connected to the inner wall of the high-strength FRP outer layer, and a perforated metal plate layer is fixedly connected to the inner wall of the honeycomb noise reduction pad layer.

[0013] Preferably, the dust filter cover is an annular cover plate, and a dust filter screen is fixedly connected to the side wall through an opening; the airflow noise reduction plate is an annular plate, and an annular micro-perforated noise reduction plate is fixedly connected to the top surface through an opening.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model utilizes the synergistic effect of multiple noise reduction structures, including a polyurethane foam filling layer, a honeycomb noise reduction pad layer, a perforated metal plate layer, and an annular micro-perforated noise reduction plate, combined with an arc-shaped flow guide buffer plate to guide and buffer the airflow, effectively absorbing, blocking, and reducing aerodynamic noise and water flow impact noise generated during the operation of the cooling tower, significantly reducing noise pollution and creating a quiet atmosphere for the surrounding environment.

[0016] 2. This utility model utilizes the annular cover plate of the dustproof filter cover and the dustproof filter screen to form an all-round dustproof barrier, which can effectively block dust and particulate matter from entering the air duct. Combined with the arc-shaped surface design of the top of the duct cover, it reduces dust accumulation and prevents the noise reduction components from reducing the sound absorption effect due to dust clogging the pores, thus ensuring the normal use and service life of the internal noise reduction components.

[0017] 3. This utility model utilizes a split structure for the air duct body, consisting of a duct base, a noise-reducing duct middle section, and a duct top cover. These are connected via threaded mounting ports and snap-fit ​​mounting ports, facilitating disassembly and assembly. The design of the limiting mechanism and installation mechanism ensures that components such as the dust filter cover and airflow noise reduction plate are securely installed and easily disassembled, making it convenient to clean, maintain, and replace each component, reducing equipment maintenance costs and improving ease of use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a front sectional view of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of the airflow noise reduction plate of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Duct body; 2. Duct base; 3. Threaded mounting port; 4. Noise-reducing duct middle section; 5. Snap-fit ​​mounting port; 6. Duct top cover; 7. Limiting annular plate; 8. Dustproof filter cover; 9. Air outlet; 10. Support frame plate; 11. Arc-shaped flow guide buffer plate; 12. Airflow noise reduction plate; 13. Polyurethane foam filling layer; 14. Lifting lug; 15. Positioning bolt; 16. Positioning port; 17. Limiting nut; 18. Limiting rod; 19. Limiting disc; 20. Threaded limiting port; 21. Limiting bolt; 22. High-strength annular base; 23. Shock-absorbing rubber ring pad; 24. High-strength FRP outer layer; 25. Honeycomb noise reduction pad layer; 26. Perforated metal plate layer; 27. Dustproof filter screen; 28. Annular micro-perforated noise reduction plate. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model discloses a noise-reducing composite air duct structure for cooling towers.

[0026] This utility model provides, for example Figure 1-3 The cooling tower noise reduction composite duct structure shown includes a duct body 1, a duct base 2, a threaded mounting port 3 on the inner side wall of the top of the duct base 2, and a noise reduction duct middle section 4 threadedly connected thereto. A snap-fit ​​mounting port 5 is provided on the top of the noise reduction duct middle section 4, and a duct top cover 6 is snap-fitted thereto. A limiting annular plate 7 is fixedly connected to the duct wall of the noise reduction duct middle section 4. A dustproof filter cover 8 is sleeved on the outer wall of the duct top cover 6. A limiting mechanism is provided between the dustproof filter cover 8 and the limiting annular plate 7.

[0027] The top of the wall of the middle section 4 of the noise reduction cylinder has an air outlet 9, and multiple support plates 10 are fixedly connected to it. The bottom of the top cover 6 is fixedly connected to an arc-shaped flow guide buffer plate 11. The bottom of the arc-shaped flow guide buffer plate 11 is fixedly connected to an airflow noise reduction plate 12 through an installation mechanism. The cavity of the top cover 6 is filled with a polyurethane foam layer 13. The top of the top cover 6 has an arc-shaped surface, and the two ends are fixedly connected to lifting lugs 14. The split structure of the cylinder base 2, the middle section 4 of the noise reduction cylinder, and the top cover 6 is used, and they are connected by threaded mounting ports 3 and snap-fit ​​mounting ports 5, which facilitates the disassembly and installation of the air duct body 1 and the maintenance and replacement of the noise reduction components inside the air duct. The limiting ring plate 7 and the limiting mechanism can stably fix the dust filter cover 8, ensuring that it will not easily fall off during use and protecting the dust filter. The dust absorption effect is achieved through the design of the air outlet 9 and the support plate 10, which facilitates smooth air discharge. The support plate 10 provides support for the top cover 6, enhancing structural stability. The arc-shaped flow guide buffer plate 11 guides and buffers the airflow, reducing noise generated by airflow impact. The airflow noise reduction plate 12 further reduces airflow noise. The polyurethane foam filling layer 13 has good sound absorption properties, effectively absorbing noise. The arc-shaped design of the top of the top cover 6 guides dust to slide to both sides, reducing dust accumulation. The lifting lugs 14 facilitate the hoisting and transportation of the air duct. This solves the problems of noise pollution caused by the operation of existing composite cooling tower air ducts, and the easy entry of dust into the air duct, which clogs the pores of the noise reduction components and reduces the sound absorption effect.

[0028] To limit the installation of the dust filter cover 8 and facilitate its disassembly, such as Figure 2As shown, the limiting mechanism includes positioning bolts 15, positioning ports 16, and limiting nuts 17. Positioning bolts 15 are fixedly connected to the bottom four sides of the dust filter cover 8, and positioning ports 16 are opened on the top four sides of the limiting ring plate 7. Each positioning bolt 15 passes through the corresponding positioning port 16 and is threadedly connected to the limiting nut 17. By using the limiting mechanism composed of positioning bolts 15, positioning ports 16, and limiting nuts 17, the dust filter cover 8 and the limiting ring plate 7 can be firmly connected. The installation and disassembly operations are simple, and it is convenient to clean or replace the dust filter cover 8 to ensure its continuous and effective dustproof function.

[0029] To facilitate the installation and disassembly of the arc-shaped flow guide buffer plate 11, such as Figure 2 As shown, the installation mechanism includes a limiting rod 18, a limiting plate 19, a threaded limiting port 20, and a limiting bolt 21. The bottom of the arc-shaped flow guide buffer plate 11 is fixedly connected to the limiting rod 18. One end of the limiting rod 18 passes through the airflow noise reduction plate 12 and is inserted into the limiting plate 19. The side walls of the limiting plate 19 and the limiting rod 18 are provided with corresponding threaded limiting ports 20, and the threaded limiting bolts 21 are connected. The installation mechanism allows the airflow noise reduction plate 12 to be stably installed at the bottom of the arc-shaped flow guide buffer plate 11. The combination of the limiting rod 18, the limiting plate 19, the threaded limiting port 20, and the limiting bolts 21 ensures the reliability of the connection and facilitates the disassembly and maintenance of the airflow noise reduction plate 12, ensuring the stability of its noise reduction performance.

[0030] For stable support and shock absorption, such as Figure 1 and 2 As shown, the cylinder base 2 includes a high-strength annular base 22, and a shock-absorbing rubber ring pad 23 is fixedly connected to the bottom of the high-strength annular base 22. The high-strength annular base 22 provides a stable support foundation, and the shock-absorbing rubber ring pad 23 can effectively absorb the vibration generated during the operation of the cooling tower, reduce the noise generated by vibration transmission, and further improve the noise reduction effect.

[0031] To improve the noise reduction capability of the middle section 4 of the noise reduction cylinder, such as Figure 2 As shown, the middle section 4 of the noise reduction cylinder includes a high-strength FRP outer layer 24, a honeycomb noise reduction pad 25 is fixedly connected to the inner wall of the high-strength FRP outer layer 24, and a perforated metal plate layer 26 is fixedly connected to the inner wall of the honeycomb noise reduction pad 25. The high-strength FRP outer layer 24 ensures the structural strength and durability of the middle section 4 of the noise reduction cylinder. The unique honeycomb structure of the honeycomb noise reduction pad 25 can effectively absorb and block noise. The perforated metal plate layer 26 reflects and absorbs sound through its pores. Together with the honeycomb noise reduction pad 25, they significantly improve the noise reduction capability of the middle section 4 of the noise reduction cylinder.

[0032] To achieve dust prevention and noise reduction, such as Figure 1-3As shown, the dust filter cover 8 is an annular cover plate, and a dust filter screen 27 is fixedly connected to the side wall through an opening. The airflow noise reduction plate 12 is an annular plate, and an annular micro-perforated noise reduction plate 28 is fixedly connected to the top surface through an opening. The dust filter cover 8, composed of the annular cover plate and the dust filter screen 27, can block dust, particulate matter and other impurities from entering the air duct in all directions, protecting the internal noise reduction components. The micro-perforated structure of the annular micro-perforated noise reduction plate 28 can effectively reduce airflow noise, further enhancing the noise reduction effect of the airflow noise reduction plate 12.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A noise-reducing composite duct structure for cooling towers, comprising a duct body (1), characterized in that, The duct body (1) includes a duct base (2), the inner side wall of the top of the duct base (2) is provided with a threaded mounting port (3), and a noise reduction duct middle section (4) is threadedly connected thereto. The top of the noise reduction duct middle section (4) is provided with a snap-fit ​​mounting port (5), and a duct top cover (6) is snap-fitted thereto. A limiting ring plate (7) is fixedly connected to the duct wall of the noise reduction duct middle section (4). A dustproof filter cover (8) is sleeved on the outer wall of the duct top cover (6). A limiting mechanism is provided between the dustproof filter cover (8) and the limiting ring plate (7). The top of the wall of the middle section (4) of the noise reduction cylinder is provided with an air outlet (9) and is fixedly connected with multiple support plates (10). The bottom of the cylinder top cover (6) is fixedly connected with an arc-shaped flow guide buffer plate (11). The bottom of the arc-shaped flow guide buffer plate (11) is fixedly connected with an airflow noise reduction plate (12) through an installation mechanism. The cavity of the cylinder top cover (6) is provided with a polyurethane foam filling layer (13). The top of the cylinder top cover (6) is provided with an arc-shaped surface and is fixedly connected with lifting lugs (14) at both ends.

2. The noise-reducing composite air duct structure for cooling towers according to claim 1, characterized in that, The limiting mechanism includes positioning bolts (15), positioning ports (16) and limiting nuts (17). Positioning bolts (15) are fixedly connected to the bottom four sides of the dust filter cover (8). Positioning ports (16) are opened on the top four sides of the limiting ring plate (7). Each positioning bolt (15) passes through the corresponding positioning port (16) and is threadedly connected to the limiting nut (17).

3. The noise-reducing composite air duct structure for cooling towers according to claim 1, characterized in that, The installation mechanism includes a limiting rod (18), a limiting plate (19), a threaded limiting port (20), and a limiting bolt (21). The bottom of the arc-shaped flow guide buffer plate (11) is fixedly connected to the limiting rod (18). One end of the limiting rod (18) passes through the airflow noise reduction plate (12) and is inserted into the limiting plate (19). The side walls of the limiting plate (19) and the limiting rod (18) are provided with corresponding threaded limiting ports (20), and the threaded connection is to the limiting bolt (21).

4. The noise-reducing composite air duct structure for cooling towers according to claim 1, characterized in that, The cylindrical base (2) includes a high-strength annular base (22), and a shock-absorbing rubber ring pad (23) is fixedly connected to the bottom of the high-strength annular base (22).

5. The noise-reducing composite air duct structure for cooling towers according to claim 1, characterized in that, The middle section (4) of the noise reduction cylinder includes a high-strength FRP outer layer (24), and a honeycomb noise reduction pad layer (25) is fixedly connected to the inner wall of the high-strength FRP outer layer (24). A perforated metal plate layer (26) is fixedly connected to the inner wall of the honeycomb noise reduction pad layer (25).

6. The noise-reducing composite air duct structure for cooling towers according to claim 1, characterized in that, The dust filter cover (8) is an annular cover plate, and the side wall is fixedly connected with a dust filter screen (27) through an opening. The airflow noise reduction plate (12) is an annular plate, and the top surface is fixedly connected with an annular micro-perforated noise reduction plate (28) through an opening.

Images