Ventilation and sound insulation barrier of mechanical ventilation cooling tower and installation method

Abstract

The invention relates to a ventilation and sound insulation barrier of a mechanical ventilation cooling tower and an installation method, the ventilation and sound insulation barrier is composed of sound absorption and insulation modules and ventilation and noise elimination modules at intervals, each sound absorption and insulation module comprises a sound insulation panel, a resonance sound absorption layer and a sound insulation layer, and broadband noise is effectively absorbed; a flow guide noise elimination layer, a noise elimination resonant cavity and an adjustable rotating rainproof plate are arranged in the ventilation noise elimination module, and the ventilation and noise reduction requirements are balanced. According to the installation method, the installation position and height of the barrier are optimized through noise simulation software, and a scheme farthest from a sound source and lowest in height is selected by combining sound source parameters and sensitive point positions. Efficient noise reduction is achieved through modular design, the low-frequency noise treatment capacity is improved through the resonance sound absorption and flow guide noise elimination technology, the rainproof structure is adopted to adapt to the complex environment, and the problems that a traditional sound insulation barrier is poor in ventilation performance and single in noise reduction frequency are solved.

Description

Technical Field

[0001] This application relates to the technical field of ventilation and noise reduction, and more specifically, to a ventilation and sound insulation barrier for a mechanical draft cooling tower and an installation method thereof. Background Art

[0002] Gas-steam combined cycle power generation belongs to clean and efficient power generation technology and has been widely used. In terms of environmental impact, the noise pollution problem of large gas power plants is becoming increasingly prominent. As a large industrial building group in gas power plants, how to reduce the noise of mechanical draft cooling towers and minimize their impact on the internal and external environments of the plant has become the focus of environmental protection and noise reduction design in current gas power plants.

[0003] The noise sources of mechanical draft cooling towers are mainly splash noise, fan noise, and aerodynamic noise. Installing a sound insulation barrier near the cooling tower is a common noise control measure. Traditional sound insulation barriers are relatively simple, mostly vertical plate structures, and the materials are mainly metal or high-density plates. Although the sound insulation effect is acceptable, the ventilation performance is poor, which will affect the heat dissipation efficiency of the cooling tower. In view of the defects of traditional sound insulation barriers, in recent years, many researchers have designed composite sound insulation barriers that have both ventilation and sound insulation functions, which have alleviated the contradiction between ventilation and sound insulation to a certain extent.

[0004] The prior art, such as the Chinese patent application with the publication number "CN113605266A", discloses an intelligent sound and wind barrier system and its control method, including: multiple columns, and a sound and wind barrier unit is provided between adjacent two columns on the same side of the line; the sound and wind barrier unit includes a sound barrier unit, a wind barrier unit, and a diversion channel; each sound and wind barrier unit further includes an anemometer for monitoring wind speed and direction, a noise monitor for monitoring noise volume, a data receiving module, a control processing module, and a power supply module; the anemometer and the noise monitor are respectively electrically connected to the data receiving module; the data receiving module, the sound barrier unit, and the wind barrier unit are respectively electrically connected to the control processing module; the rotation angle of the wind barrier unit is automatically adjusted according to different wind speeds, and the opening angle of the sound barrier unit is automatically adjusted according to different noise volumes, which can automatically adapt to different wind speed changes and different noise environments, and can achieve the best wind resistance performance and sound absorption performance under different working conditions.

[0005] The problems existing in the above prior art are that the wind barrier unit of this method only adjusts the angle by rotating the outer shell, and no diversion and sound absorption layer or ventilation cavity structure is designed, which may make it difficult to dynamically balance the ventilation efficiency and the noise reduction effect; this sound and wind barrier contains multiple complex mechanical and electronic components, which are easily affected by factors such as corrosion and aging when exposed to the outdoor environment for a long time, resulting in system failures, which may increase the difficulty and cost of later use and maintenance; a modular installation method is not adopted, and in practical applications, the installation height is affected by the material strength. Summary of the Invention

[0006] To solve the above technical problems, the present invention proposes a ventilation sound insulation barrier and system for a mechanical draft cooling tower.

[0007] The technical solution of the present invention is as follows:

[0008] The present invention proposes a ventilation sound insulation barrier for a mechanical draft cooling tower, including: a plurality of sound absorption and insulation modules and ventilation and noise elimination modules arranged at intervals in the direction perpendicular to the ground, with a rubber shock-absorbing and sound-insulating pad between the sound absorption and insulation modules and the ventilation and noise elimination modules, wherein:

[0009] The sound absorption and insulation modules are sequentially arranged from the inner side close to the mechanical draft cooling tower to the outer side: a sound insulation panel composed of a panel and a micro-perforated aluminum plate, two groups of resonance sound absorption layers composed of a sound absorption layer and a cavity arranged at intervals, a sound insulation layer, and an outer protection layer;

[0010] The ventilation and noise elimination module includes a housing formed by surrounding a top plate, a bottom plate, and side plates, as well as a first rain-proof plate, a second rain-proof plate, a third rain-proof plate, a plurality of sound absorption columns, a plurality of noise elimination resonance cavities, a flow guiding and noise elimination layer, a rotating shaft, a rotating rain-proof plate, a driving motor, a power control module, and a ventilation cavity; the ventilation cavity is formed by arranging a plurality of sound absorption columns on the side close to the mechanical draft cooling tower and the side far from the mechanical draft cooling tower; the first rain-proof plate and the second rain-proof plate are respectively arranged at the upper and lower air inlets of the ventilation cavity, the rotating rain-proof plate and the third rain-proof plate are respectively arranged at the upper and lower air outlets of the ventilation cavity, the flow guiding and noise elimination layer is arranged in the ventilation cavity, and each noise elimination resonance cavity is arranged side by side on both sides of the flow guiding and noise elimination layer; the driving motor is arranged in the top plate and is electrically connected to the power control module located outside the housing; the rotating shaft is rotatably connected to the end of the top plate far from the mechanical draft cooling tower, and the rotating rain-proof plate is fixedly sleeved on the rotating shaft, and the rotating shaft is connected to the output shaft of the driving motor and is driven by the driving motor.

[0011] As a preferred embodiment, spherical protrusions for enhancing noise reflection are provided on the panel.

[0012] As a preferred embodiment, porous sound absorption glass wool is filled in the sound absorption layer; high-density sound insulation felt material is filled in the sound insulation layer.

[0013] As a preferred embodiment, the first rain-proof plate, the second rain-proof plate, the third rain-proof plate, the outer protection layer, the top plate, the bottom plate, the side plates, and the rotating rain-proof plate are made of metal sound insulation materials.

[0014] As a preferred embodiment, the sound absorption columns and the flow guiding and noise elimination layer are metal sound insulation plates filled with porous sound absorption glass wool.

[0015] On the other hand, the present invention also provides an installation method for a ventilation sound insulation barrier of a mechanical draft cooling tower, including the following steps:

[0016] Before installing the ventilation and sound insulation barrier, control the rotating rain shield to be in the fully open state, and measure the minimum sound insulation value of the ventilation and sound insulation barrier as the input parameter for the noise simulation software;

[0017] Based on the actual sound source parameters and the location of the sensitive point, construct a noise propagation model; the sound source parameters include: sound source intensity, sound source frequency, and sound source location;

[0018] Taking the distance between the installation position of the ventilation and sound insulation barrier and the sound source, and the installation height as variables, simulate the noise reduction effects of different combinations of installation positions and installation heights;

[0019] Calculate the noise values of each combination through the noise simulation software, and select the installation position and installation height.

[0020] As a preferred embodiment, the sound absorption and insulation module and the ventilation and noise elimination module in the ventilation and sound insulation barrier are installed by embedding H-shaped steel.

[0021] As a preferred embodiment, during the process of simulating the noise reduction effects of different combinations of installation positions and installation heights, make the overall width of the ventilation and sound insulation barrier exceed the edge of the mechanical ventilation cooling tower by ≥2m to suppress the side diffraction noise.

[0022] As a preferred embodiment, during the process of selecting the installation position and height, preferably select the scheme with the farthest distance between the installation position of the ventilation and sound insulation barrier and the sound source and the lowest installation height.

[0023] On the other hand, the present invention also provides an electronic device, on which a computer program is stored, and when the computer program is executed by a processor, it implements a ventilation and sound insulation barrier for a mechanical ventilation cooling tower as described in any embodiment of the present invention.

[0024] On the other hand, the present invention also provides a computer-readable medium for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement a ventilation and sound insulation barrier for a mechanical ventilation cooling tower as described in any embodiment of the present invention.

[0025] The present invention has the following beneficial effects: The ventilation and sound insulation barrier structure designed by the present invention is simple in structure and easy to install, and the installation height can be arbitrarily selected through modular installation; the sound insulation barrier uses a composite structure designed by a variety of noise reduction principles, with excellent noise reduction performance, and can adjust the noise reduction amount and ventilation amount according to the use scenario, which is flexible and efficient; the method of combining the noise simulation software SoundPLAN to select the installation position and height of the barrier is simple, without complex calculations, and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic flow chart of the method of the present invention;

[0028] Figure 2 It is a schematic structural diagram of a ventilation and sound insulation barrier;

[0029] Figure 3 It is a schematic structural diagram of a sound absorption and insulation module;

[0030] Figure 4 It is a schematic structural diagram of a ventilation and noise elimination module;

[0031] Figure 5 It is a schematic diagram of the setting of a sound source point and a noise measurement point;

[0032] Figure 6 It is a noise distribution cloud map. Detailed implementation manners

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] It should be understood that the step numbers used in the text are only for convenient description and do not limit the execution order of the steps.

[0035] It should be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0036] The terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0037] The term "and / or" refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0038] Example 1:

[0039] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will specifically describe the technical solutions of the present invention in conjunction with specific embodiments of this application and with reference to the appended Figure 1 , and describe the technical solutions of the present invention clearly and completely.

[0040] To solve the problems of the existing technology, the present invention provides an installation method for a ventilation and sound insulation barrier of a forced-draft cooling tower, including the following steps:

[0041] Before installing the ventilation and sound insulation barrier, control the rotating rain shield 29 to be in a fully open state, measure the minimum sound insulation amount of the ventilation and sound insulation barrier, and use it as an input parameter for the noise simulation software;

[0042] The sound absorption and insulation module 1 and the ventilation and noise elimination module 2 in the ventilation and sound insulation barrier are installed by embedding H-shaped steel.

[0043] As shown in the appended Figure 5 , set a test sound source with the same actual sound source intensity and frequency 2 meters in front of the center of the sound insulation barrier (the actual sound source parameters are measured in advance), set a noise measurement point behind the center of the sound insulation barrier, measure the noise values at the noise measurement point before and after inserting the sound insulation barrier, and use the difference between these two data as the sound insulation amount parameter of the sound insulation barrier and input it into the noise simulation software SoundPLAN;

[0044] Based on the actual sound source parameters and the location of the sensitive point, construct a noise propagation model; the sound source parameters include: sound source intensity, sound source frequency, and sound source location;

[0045] Taking the distance between the installation position of the ventilation and sound insulation barrier and the sound source, and the installation height as variables, simulate the noise reduction effects of different combinations of installation positions and installation heights;

[0046] To ensure the ventilation efficiency and noise reduction effect of the forced-draft cooling tower, the position of the sound insulation barrier is at least 2 m away from the sound source, and the height is at least 1 m higher than the center position of the sound source. On this basis, increase the installation position and installation height at intervals of 1 m, and first set 5 installation positions and 5 installation heights in the software for a total of 25 groups for simulation;

[0047] During the process of simulating the noise reduction effects of different combinations of installation positions and installation heights, the width of the ventilation and sound insulation barrier exceeds the edge of the forced-draft cooling tower by ≥2 m to suppress the side diffraction noise.

[0048] Calculate the noise values of each combination through the noise simulation software, and select the installation position and installation height.

[0049] During the process of selecting the installation location and height, it is preferred to choose the plan with the farthest distance from the sound source and the lowest installation height for the ventilation and sound insulation barrier.

[0050] Specific implementation case:

[0051] In a certain gas power plant, the sound source intensity of the mechanical draft cooling tower is measured to be 93 dBA, the noise frequency is mainly concentrated at 500 Hz, and the center height of the sound source is 5 m. According to the requirements of the "Industrial Enterprise Factory Boundary Environmental Noise Emission Standard" GB 12348 - 2008, the functional area to which this power plant belongs needs to meet the limit that the factory boundary noise does not exceed 65 dBA. In the noise simulation software SoundPLAN, a model is built based on the actual installation location of the mechanical draft cooling tower group in this power plant and the location of the factory boundary closest to the cooling tower group. The noise source parameters are input, and noise receiving points are set at the factory boundary. The installation positions of the sound insulation barrier are set at 2 m, 3 m, 4 m, 5 m, and 6 m away from the sound source respectively. At each position, the sound barrier heights are set at 6 m, 7 m, 8 m, 9 m, and 10 m respectively, and the width of the sound barrier extends 2 m beyond the edge of the cooling tower. The noise reduction amount of the sound barrier input is 25 dBA (assumed parameter, and the actual measured data should be input). Based on the above data, simulations are carried out in the software, and the following noise data at the noise receiving points are obtained (the noise distribution cloud map can be seen in the appendix Figure 6 ).

[0052] Table 1 Noise values at the noise receiving points (unit: dBA)

[0053] Height 6m Height 7m Height 8m Height 9m Height 10m Distance 2m 68.2 66.6 64.7 63 61.4 Distance 3m 68.2 66.8 65 63.2 61.6 Distance 4m 68.2 66.9 65.1 63.4 61.9 Distance 5m 68.3 67 65.3 63.6 62.1 Distance 6m 68.3 67.1 65.4 63.8 62.3

[0054] According to the simulation results in the above table, it can be seen that when the installation position of the sound insulation barrier is 3 m away from the sound source and the height is 8 m, it just meets the limit requirements of the factory boundary noise. The noise values when the barrier height is 8 m, the distance from the sound source is 2 m, and the heights are 9 m and 10 m respectively are all lower than the limit requirement of 65 dBA. Considering that reducing the distance will reduce the ventilation volume of the cooling tower, increasing the height will increase the cost and affect the aesthetics, on the premise of ensuring the noise reduction requirement, in this implementation case, the sound insulation barrier can be installed 3 m away from the cooling tower, and the barrier height is 8 m. During actual operation, the angle and opening state of the rotating panel in the ventilation and noise elimination module can be adjusted according to the change of the sound source parameters of the cooling tower (each module can be independently adjusted) to adjust the noise reduction amount of the sound insulation barrier so as to meet the actual noise reduction requirements, and at the same time provide the maximum ventilation volume of the sound insulation barrier.

[0055] Example 2:

[0056] This example provides a mechanical draft cooling tower ventilation and sound insulation barrier, as Figure 2 shown, including: a number of sound absorption and insulation modules 1 and ventilation and noise elimination modules 2 arranged at intervals in the vertical direction perpendicular to the ground. A rubber shock-absorbing and sound-insulating pad 3 is padded between the sound absorption and insulation module 1 and the ventilation and noise elimination module 2, where:

[0057] The sound absorption and insulation module 1 is sequentially provided with, from the inside close to the mechanical draft cooling tower to the outside: a sound insulation panel composed of a panel 11 and a micro-perforated aluminum plate 12, two groups of resonance sound absorption layers composed of a sound absorption layer 13 and a cavity 14 arranged at intervals, a sound insulation layer 15, and an outer protection layer 16;

[0058] Spherical protrusions for enhancing noise reflection are provided on the panel 11.

[0059] The sound absorption layer 13 is filled with porous sound absorption glass wool; the sound insulation layer 15 is filled with a high-density sound insulation felt material.

[0060] As Figure 3 shown, the specific working process of the sound absorption and insulation module 1 is as follows: The noise generated by the mechanical draft cooling tower propagates to the sound insulation panel composed of the panel 11 and the micro-perforated aluminum plate 12. The spherical protrusion structure provided on the panel 11 can enhance the reflection of the noise when it propagates to the panel, eliminating part of the noise. The tiny holes in the micro-perforated aluminum plate 12 can generate resistance to the air when the noise sound wave passes through, consuming the sound wave energy, thereby achieving sound absorption and noise reduction; The sound wave passing through the micro-perforated aluminum plate 12 undergoes processes such as propagation, reflection, refraction, scattering, as well as viscous resistance and heat dissipation in the pores of the porous sound absorption glass wool in the sound absorption layer 13, converting the sound energy into heat energy and dissipating it, thereby achieving a good sound absorption effect; After passing through the sound absorption layer 13, the sound wave enters the cavity 14, and a resonance phenomenon will occur in the cavity 14, causing the sound wave energy to be repeatedly reflected and propagated in the cavity. At this time, the fiber structure of the porous sound absorption cotton in the sound absorption layer 13 will interact with the sound wave in the cavity 14, further absorbing and dissipating the sound energy; The present invention designs two sound absorption layers 13 and two cavities 14 to form a resonance sound absorption layer, further enhancing the absorption and dissipation of the sound wave and improving the noise reduction effect; Finally, the sound wave propagates to the sound insulation layer 15. The sound insulation layer 15 is filled with a high-density sound insulation felt material, which can effectively prevent the vibration of the single board and prevent the sound wave from transmitting. In addition, the sound insulation felt can also convert the sound energy into heat energy through its damping characteristics, further reducing the energy of the sound wave. The sound absorption and insulation module 1 realizes effective noise reduction for broadband sound waves by combining porous sound absorption cotton, cavities, and sound insulation felt, and can meet various noise reduction requirements in practical applications.

[0061] The ventilation and noise reduction module 2 includes a housing formed by enclosing a top plate 24, a bottom plate 25, and side plates 26, as well as a first rain shield 221, a second rain shield 222, a third rain shield 223, a number of sound absorption columns 22, a number of noise reduction resonance cavities 23, a flow guiding noise reduction layer 27, a rotating shaft 28, a rotating rain shield 29, a driving motor 210, a power control module 211, and a ventilation cavity 212; the ventilation cavity 212 is formed by arranging a number of sound absorption columns 22 on the side close to the mechanical draft cooling tower and the side far from the mechanical draft cooling tower of the ventilation and noise reduction module 2; the first rain shield 221 and the second rain shield 222 are respectively arranged at the upper and lower air inlets of the ventilation cavity 212, the rotating rain shield 29 and the third rain shield 223 are respectively arranged at the upper and lower air outlets of the ventilation cavity 212, the flow guiding noise reduction layer 27 is arranged inside the ventilation cavity 212, and each noise reduction resonance cavity 23 is arranged side by side on both sides of the flow guiding noise reduction layer 27; the driving motor 210 is arranged in the top plate 24 and is electrically connected to the power control module 211 located outside the housing; the rotating shaft 28 is rotatably connected to the end of the top plate 24 far from the mechanical draft cooling tower, and the rotating rain shield 29 is fixedly sleeved on the rotating shaft 28, and the rotating shaft 28 is connected to the output shaft of the driving motor 210 and is driven by the driving motor 210.

[0062] The first rain shield 221, the second rain shield 222, the third rain shield 223, the outer protective layer 16, the top plate 24, the bottom plate 25, the side plates 26, and the rotating rain shield 29 are made of metal sound insulation materials.

[0063] The sound absorption columns 22 and the flow guiding noise reduction layer 27 are made of porous sound absorption glass wool filled in metal sound insulation plates.

[0064] The rotating rain shield 29 can independently adjust the angle to balance the ventilation volume and the noise reduction requirement in real time.

[0065] Such as Figure 4As shown in the figure, the specific working process of the ventilation and noise reduction module 2 is as follows: The first rain shield 221, the second rain shield 222, the third rain shield 223 and the rotating rain shield 29 can block rainwater from entering the interior of the ventilation and noise reduction module 2; When noise arrives at the rain shields 221, 222 and the sound-absorbing columns 22 on the side surface of the ventilation and noise reduction module 2 from the forced-draft cooling tower, it is reflected and simultaneously absorbed by the sound-absorbing glass wool filled in the sound-absorbing columns 22; The ventilation cavity 212 formed by a number of sound-absorbing columns 22 includes upper and lower air inlets and an air outlet. During the process that sound waves enter the ventilation cavity through the upper and lower air inlets, the sound waves are continuously reflected between the sound-absorbing columns 22 arranged at the upper and lower air inlets, and the sound-absorbing materials in the sound-absorbing columns can enhance the attenuation and absorption of the sound waves; The upper and lower sound waves meet in front of the flow-guiding and noise reduction plate 27 in the ventilation cavity 212 and interfere with each other to cancel out, reducing the sound wave intensity; When the sound waves pass through the upper and lower channels divided by the flow-guiding and noise reduction plate 27, part of the sound waves propagate to the flow-guiding and noise reduction plate 27, and the sound wave intensity is attenuated through reflection and the sound-absorbing effect of the internal sound-absorbing cotton; Part of the sound waves enter the resonance cavity through the openings of a number of noise reduction resonance cavities 23 arranged on both sides of the flow-guiding and noise reduction plate 27, exciting the air vibration in the cavity to generate the Helmholtz resonance phenomenon, resulting in a large amount of absorption and dissipation of the sound wave energy, thereby achieving noise reduction. There are multiple noise reduction resonance cavities 23 with different volume sizes arranged along the sound wave propagation direction, which can absorb noises of various frequencies and achieve the noise reduction function of a wide frequency band; When the sound waves pass through the end of the flow-guiding and noise reduction plate 27, the upper and lower sound waves interfere with each other again to cancel out, and then reflection and sound absorption occur between the sound-absorbing columns 22 in the outlet channel, and finally propagate outside the module; The rain shield 223 and the rotating rain shield 29 at the air outlet can reflect the sound waves to the ground, enhancing the sound wave attenuation and reducing the propagation distance; The rotating rain shield 29 is connected to the rotating shaft 28 and is driven by the driving motor 210. The rotating panels of each module are controlled separately, and the rotating angle can be adjusted according to the actual application scenario to change the ventilation volume and noise reduction amount of the module.

[0066] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent the situation where A exists alone, A and B exist simultaneously, and B exists alone. Where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and back associated objects. "At least one of the following" and its similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0067] The above are only embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A mechanical ventilation cooling tower ventilation sound insulation barrier, characterized in that: include: A plurality of sound absorbing and insulating modules (1) and ventilation and noise elimination modules (2) are arranged at intervals in a vertical direction to the ground, and a rubber shock-absorbing and noise-insulating pad (3) is provided between the sound absorbing and insulating modules (1) and the ventilation and noise elimination modules (2), wherein: The sound absorption and insulation module (1) is provided with, from the inner side close to the mechanical ventilation cooling tower to the outer side, a sound insulation panel composed of a panel (11) and a micro-perforated aluminum plate (12), two groups of resonant sound absorption layers composed of a sound absorption layer (13) and a cavity (14) arranged at intervals, a sound insulation layer (15), and an outer protective layer (16); The ventilation and noise reduction module (2) comprises a shell formed by a top plate (24), a bottom plate (25), and a side plate (26), as well as a first rain shield (221), a second rain shield (222), a third rain shield (223), a plurality of sound-absorbing columns (22), a plurality of sound-absorbing resonance chambers (23), a flow-guiding and sound-absorbing layer (27), a rotating shaft (28), a rotating rain shield (29), a driving motor (210), a power supply control module (211), and a ventilation chamber (212); the ventilation and noise reduction module (2) forms a ventilation chamber (212) by arranging a plurality of sound-absorbing columns (22) on a side close to a mechanical ventilation cooling tower and a side away from the mechanical ventilation cooling tower; the first rain shield (221) and the second rain shield (222) are respectively arranged on the ventilation chamber (212); The upper and lower air inlets of the air cavity (212), the rotating rain shield (29) and the third rain shield (223) are respectively arranged at the upper and lower air outlets of the ventilation cavity (212), the flow-guiding and sound-absorbing layer (27) is arranged in the ventilation cavity (212), and the sound-absorbing resonance cavities (23) are arranged side by side on both sides of the flow-guiding and sound-absorbing layer (27); the driving motor (210) is arranged in the top plate (24) and is electrically connected to the power control module (211) located outside the shell; the rotating shaft (28) is rotatably connected to the end of the top plate (24) away from the mechanical ventilation cooling tower, and the rotating rain shield (29) is fixedly sleeved on the rotating shaft (28), and the rotating shaft (28) is connected to the output shaft of the driving motor (210) and is driven by the driving motor (210).

2. A mechanical ventilation cooling tower ventilation sound insulation barrier according to claim 1, characterized in that: The panel (11) is provided with spherical protrusions for enhancing noise reflection.

3. A mechanical ventilation cooling tower ventilation sound insulation barrier according to claim 1, characterized in that: The sound absorbing layer (13) is filled with porous sound absorbing glass wool; and the sound insulating layer (15) is filled with high-density sound insulating felt material.

4. A mechanical ventilation cooling tower ventilation sound insulation barrier according to claim 1, characterized in that: The first rainproof plate (221), the second rainproof plate (222), the third rainproof plate (223), the outer protective layer (16), the top plate (24), the bottom plate (25), the side plate (26) and the rotating rainproof plate (29) are made of metal sound insulation material.

5. A mechanical ventilation cooling tower ventilation sound insulation barrier according to claim 1, characterized in that: The sound-absorbing column (22) and the diversion sound-absorbing layer (27) are metal sound-insulating panels filled with porous sound-absorbing glass wool.

6. A method for installing a mechanical ventilation cooling tower ventilation sound insulation barrier according to any one of claims 1 to 5, characterized in that: The following steps are involved: Before the ventilation and sound insulation barrier is installed, the rotating rain shield (29) is controlled to be in a fully open state, and the minimum sound insulation of the ventilation and sound insulation barrier is measured as an input parameter of the noise simulation software; Based on the actual sound source parameters and the location of sensitive points, a noise propagation model is constructed; the sound source parameters include: sound source intensity, sound source frequency and sound source location; The installation position of the ventilation sound barrier, the distance from the sound source, and the installation height are used as variables to simulate the noise reduction effects of different installation position and installation height combinations; Calculate the noise value of each combination through noise simulation software and select the installation location and height.

7. A method for installing a mechanical ventilation cooling tower ventilation sound insulation barrier according to claim 6, characterized in that: The sound absorption and insulation module (1) and the ventilation and sound insulation module (2) in the ventilation and sound insulation barrier are installed by embedding H-shaped steel.

8. A method for installing a mechanical ventilation cooling tower ventilation sound insulation barrier according to claim 6, characterized in that: In the process of simulating the noise reduction effects of different combinations of installation positions and installation heights, the overall width of the ventilation sound insulation barrier is made to exceed the edge of the mechanical ventilation cooling tower by ≥2m to suppress side diffraction noise.

9. A method for installing a mechanical ventilation cooling tower ventilation sound insulation barrier according to claim 6, characterized in that: In the process of selecting the installation position and height, priority is given to selecting the solution where the ventilation and sound insulation barrier installation position is farthest from the sound source and has the lowest installation height.

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