A noise reduction device for energy storage power stations

Abstract

This application relates to the field of electrical equipment, and more particularly to a noise reduction device for an energy storage power station. The device includes a container with a noise reduction cover. The outer wall of the container and the inner wall of the noise reduction cover form an open noise reduction chamber. An air outlet hood is disposed within the noise reduction chamber and is mounted on the container. One end of the air outlet hood near the container is an air inlet, and the other end is an air outlet. The airflow from the air outlet is directed towards the opening, and the air outlet is connected to the noise reduction chamber. The inner wall of the noise reduction cover is lined with sound-absorbing material. This application effectively reduces noise pollution generated by the energy storage power station on the surrounding environment.

Description

Technical Field

[0001] This application relates to the field of electrical equipment, and in particular to a noise reduction device for an energy storage power station. Background Technology

[0002] Currently, containerized energy storage power stations can store electricity and release it when needed, effectively addressing the imbalance of electricity in time and space. The application of energy storage power station technology permeates all stages of the power system, including generation, transmission, distribution, and consumption. It enables peak shaving and valley filling, smoothing of renewable energy generation fluctuations and tracking of plans, efficient system frequency regulation, and increased power supply reliability.

[0003] However, containerized energy storage power stations house inverters and multiple fans for cooling, with the air generated by these fans being exhausted through vents. During operation, these stations generate significant noise, which is transmitted to the external environment via the airflow from the motors, potentially causing noise pollution around the energy storage station. This situation needs to be addressed. Summary of the Invention

[0004] In order to reduce the noise pollution caused by energy storage power stations to the surrounding environment, this application provides a noise reduction device for energy storage power stations.

[0005] This application provides a noise reduction device for an energy storage power station, which adopts the following technical solution:

[0006] A noise reduction device for an energy storage power station includes a container with a noise reduction cover. The outer wall of the container and the inner wall of the noise reduction cover form a noise reduction chamber with an opening. An air outlet cover is installed in the noise reduction chamber and is mounted on the container. One end of the air outlet cover near the container is an air inlet, and the other end is an air outlet. The airflow from the air outlet is directed toward the opening. The air outlet is connected to the noise reduction chamber. The inner wall of the noise reduction cover is provided with noise reduction material.

[0007] By adopting the above technical solution, the airflow generated by the fan inside the container passes through the air inlet, air outlet cover, and air outlet in sequence before entering the silencing chamber. The high-speed airflow has a longer path inside the silencing cover, and the wind speed is reduced, thereby reducing the impact of the wind on external obstacles and reducing the amplitude of vibration of the obstacles. At the same time, sound-absorbing materials are installed on the inner wall of the silencing cover, which have high-efficiency sound absorption performance, reducing noise pollution and thus improving the noise pollution caused by the energy storage power station to the surrounding environment.

[0008] Optionally, the silencing chamber is provided with a plurality of silencing plates, one end of which is disposed on the inner wall of the silencing cover and the other end of which is disposed on the outer wall of the container. The plurality of silencing plates are arranged in a wavy pattern and are provided with a plurality of silencing hole groups.

[0009] By adopting the above technical solution, the silencing plate is provided with a group of silencing holes. The main principle is to use the structure of small holes to reduce noise and eliminate resonance. When sound waves pass through the group of silencing holes, due to the structure of the silencing holes, the sound waves will undergo refraction, scattering and reflection, ultimately forming a complex sound field distribution. This sound field distribution will cause the energy of the sound waves to dissipate and dissipate in different directions, thereby reducing noise intensity and eliminating resonance. In addition, the silencing plate is set in a wave-shaped interval, so that the sound waves undergo multiple refractions during the flow process, in order to achieve the purpose of energy consumption, thereby reducing noise.

[0010] Optionally, the silencing hole group includes a first silencing channel, a second silencing channel, and a third silencing channel, wherein the diameter of the first silencing channel is smaller than the diameter of the second silencing channel, and the diameter of the second silencing channel is smaller than the diameter of the third silencing channel.

[0011] By adopting the above technical solution, since the solution of this application needs to be coordinated with exhaust, it is not suitable for holes with too small a diameter. Therefore, the first silencing channel, the second silencing channel and the third silencing channel adopt different diameters. The smaller the diameter, the greater the acoustic impedance, which can effectively reduce high-frequency noise.

[0012] Optionally, the shape of the silencing hole group is a regular shape or a matching irregular shape.

[0013] By employing the above technical solutions, different shapes of the silencing holes can cause changes in the propagation direction of sound waves, dispersing sound energy in different directions and thus reducing noise intensity.

[0014] Optionally, the silencing hole assembly may be of one shape or a combination of multiple shapes.

[0015] By adopting the above technical solutions, the silencing hole group can be composed of one shape or multiple shapes, thereby improving the noise reduction effect of the silencing cover.

[0016] Optionally, a fixing frame is provided between the container and the soundproof cover. The fixing frame includes a first fixing part fixed to the soundproof cover and a second fixing part fixed to the container. A mounting block is provided on the side of the container near the second fixing part, and a mounting groove for the mounting block to be embedded is provided on the side of the second fixing part near the mounting block.

[0017] By adopting the above technical solution, the fixed specifications of the container are composed of corrugated plates. In order to reduce the air leakage caused by the diameter of the silencer and the container, the silencer is fixed to the container by a fixing frame. The fixing frame is fixed to the silencer by a first fixing part and fixed to the container by a second fixing part. The second fixing part is provided with a mounting groove that matches the mounting block on the container, thereby reducing the air leakage of the silencer.

[0018] Optionally, the silencer cover is provided with a first air guide surface for directing airflow toward the opening, and the air outlet cover is provided with a second air guide surface for directing airflow toward the air outlet.

[0019] By adopting the above technical solution and setting the first and second air guide surfaces, it is easier to direct the airflow towards the opening.

[0020] Optionally, an insect-proof net is provided on the inner wall of the air outlet.

[0021] By adopting the above technical solution, an insect-proof net is installed at the air outlet, which reduces the probability of outdoor mosquitoes entering the container through the air outlet and improves the stability of container operation.

[0022] Optionally, the sound-absorbing material is sound-absorbing cotton.

[0023] By employing the above technical solution, when sound waves propagate in a certain space and are incident on the sound insulation cotton wall, some of the sound energy will be reflected and some will be absorbed (including transmission). It is precisely because of the sound absorption characteristics of the sound insulation cotton that the reflected sound energy is reduced, thereby reducing noise.

[0024] Optionally, the air vent is provided with a mounting hole on the side near the container, and the air vent is fixed to the container by self-tapping screws that mate with the mounting hole.

[0025] By adopting the above technical solution, the air hood is fixed to the container by self-tapping screws that mate with the mounting holes, thereby improving the stability of the air hood when installed on the container.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The path of high-speed wind is lengthened inside the soundproof enclosure, and the wind speed is reduced, thereby reducing the impact of the wind on external obstacles and the amplitude of the vibration of the obstacles. At the same time, the sound-absorbing material installed on the inner wall of the soundproof enclosure has high-efficiency sound absorption performance, reducing noise pollution and thus improving the noise pollution caused by the energy storage power station to the surrounding environment.

[0028] 2. When sound waves pass through the silencing hole group, due to the structure of the silencing hole group, the sound waves will undergo refraction, scattering and reflection, ultimately forming a complex sound field distribution. This sound field distribution will cause the energy of the sound waves to dissipate and dissipate in different directions, thereby reducing the noise intensity and eliminating resonance; and the silencing plates are set in a wave-shaped interval, so that the sound waves undergo multiple refractions during the flow, in order to achieve the purpose of dissipating energy and thus reducing noise.

[0029] 3. Since the exhaust system in this application requires ventilation, holes with too small a diameter are not suitable. Therefore, the first, second, and third silencing channels use different diameters. The smaller the diameter, the greater the acoustic impedance, which can effectively reduce high-frequency noise. Attached Figure Description

[0030] Figure 1 This is a partial schematic diagram of the insect-proof net and the air outlet cover in the embodiments of this application;

[0031] Figure 2 This is a cross-sectional view of the container and the soundproof cover in the embodiments of this application;

[0032] Figure 3 This is a partial schematic diagram of the silencing plate and silencing hole assembly in an embodiment of this application;

[0033] Figure 4 This is an exploded view of the soundproof enclosure and container in the embodiments of this application;

[0034] Figure 5 This is a schematic diagram of the overall structure of an embodiment of this application;

[0035] Figure 6 This is a partial schematic diagram of the container and the air hood in an embodiment of this application;

[0036] Figure 7 This is an embodiment of the present application. Figure 6 Enlarged view of section A.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Container; 2. Silencing cover; 3. Silencing chamber; 4. Air outlet cover; 5. Air inlet; 6. Air outlet; 7. Silencing material; 8. Silencing plate; 9. Silencing hole group; 10. First silencing channel; 11. Second silencing channel; 12. Third silencing channel; 13. Fixing frame; 14. First fixing part; 15. Second fixing part; 16. Mounting block; 17. Mounting groove; 18. First air guide surface; 19. Second air guide surface; 20. Insect screen; 21. Mounting hole; 22. Self-tapping screw; 23. Opening. Detailed Implementation

[0039] The following is a further detailed description of this application.

[0040] This application discloses a noise reduction device for an energy storage power station. (Refer to...) Figure 1 and Figure 2 The system includes a container 1, on which a soundproof cover 2 is installed. The outer wall of the container 1 and the inner wall of the soundproof cover 2 form a soundproof chamber 3 with an opening 23. An air outlet 4 is installed inside the soundproof chamber 3. The air outlet 4 is installed on the container 1. One end of the air outlet 4 near the container 1 is an air inlet 5, and the other end of the air outlet 4 is an air outlet 6. The airflow from the air outlet 6 is directed toward the opening 23. The air outlet 6 is connected to the soundproof chamber 3. The inner wall of the soundproof cover 2 is equipped with sound-absorbing material 7.

[0041] In this embodiment, the airflow generated by the fan inside the container 1 passes through the air inlet 5, the air outlet hood 4, and the air outlet 6 in sequence before entering the anechoic chamber 3. The airflow also carries sound waves into the anechoic chamber 3. The high-speed airflow has a longer path inside the anechoic hood 2, which slows down the wind speed, thereby reducing the impact of the wind on external obstacles and reducing the amplitude of the vibration of the obstacles. At the same time, the sound-absorbing material 7 installed on the inner wall of the anechoic hood 2 has high-efficiency sound absorption performance, which reduces the sound energy reflected by the sound waves, reduces noise pollution, and thus improves the noise pollution generated by the energy storage power station to the surrounding environment.

[0042] Reference Figure 1 and Figure 2 The silencer 2 is provided with a first air guide surface 18 for directing airflow toward the opening 23, and the air outlet hood 4 is provided with a second air guide surface 19 for directing airflow toward the air outlet 6. In the embodiment of the application, the design of the first air guide surface 18 and the second air guide surface 19 guides the airflow direction, making it easier to direct the airflow toward the opening 23 of the silencer 2.

[0043] In some embodiments, the sound-absorbing material 7 is sound-insulating cotton. When sound waves propagate in a certain space and are incident on the wall of the sound-insulating cotton, some of the sound energy is reflected and some of the sound energy is absorbed (including transmission). It is precisely because of this sound-absorbing property of the sound-insulating cotton that the reflected sound energy is reduced, thereby reducing noise.

[0044] For example Figure 1 Taking the example diagram shown, an insect-proof net 20 is installed on the inner wall of the air outlet 6. Installing the insect-proof net 20 at the air outlet 6 reduces the probability that mosquitoes and other insects from the outside environment will enter the container 1 and thus affect the normal operation of the equipment inside the container 1.

[0045] Reference Figure 2 and Figure 3The silencing chamber 3 is equipped with several silencing plates 8. One end of the silencing plate 8 is installed on the inner wall of the silencing cover 2, and the other end of the silencing plate 8 is installed on the outer wall of the container 1. The several silencing plates 8 are arranged in a wave-like pattern. Several silencing hole groups 9 are opened on the silencing plates 8. The silencing hole group 9 includes a first silencing channel 10, a second silencing channel 11, and a third silencing channel 12. The diameter of the first silencing channel 10 is smaller than the diameter of the second silencing channel 11, and the diameter of the second silencing channel 11 is smaller than the diameter of the third silencing channel 12.

[0046] In this embodiment, the silencing plate 8 is provided with a group of silencing holes 9. The main principle is to use the structure of small holes to reduce noise and eliminate resonance. Due to the structure of the silencing hole group 9, when sound waves pass through the silencing hole group 9, the sound waves will undergo refraction, scattering and reflection, ultimately forming a complex sound field distribution. This sound field distribution will cause the energy of the sound waves to dissipate and dissipate in different directions, thereby reducing the noise intensity and eliminating resonance. In addition, the silencing plate 8 is arranged in a wave-shaped interval inside the silencing cover 2, so that the sound waves undergo multiple refractions during the flow process to achieve the purpose of energy consumption, thereby absorbing and attenuating the sound energy and greatly improving its noise reduction.

[0047] The smaller the diameter of the hole, the greater the acoustic impedance, which can effectively reduce high-frequency noise. However, since the solution in this application needs to be adapted to the ventilation requirements of container 1, it is not suitable for holes with too small a diameter. Therefore, the first silencing channel 10, the second silencing channel 11 and the third silencing channel 12 adopt different diameters, which can not only adapt to the ventilation requirements of container 1, but also consume noise of different frequencies.

[0048] When sound waves pass through the silencing hole group 9, they are scattered by the structure on the surface of the silencing hole group 9, causing the sound waves to be reflected and scattered in various directions, thereby dispersing the sound wave energy in different directions and achieving the effect of silencing.

[0049] In some embodiments, the sound-absorbing plate 8 can be made of a metal material such as galvanized sheet, aluminum sheet, color steel sheet, or iron sheet. When sound waves encounter the sound-absorbing plate 8 during propagation, three phenomena occur: reflection, transmission, and diffraction.

[0050] In some embodiments, the shape of the noise-absorbing hole assembly 9 is a regular shape or a suitable irregular shape. Different shapes of the noise-absorbing hole assembly 9 will cause changes in the propagation direction of sound waves, dispersing sound energy in different directions and thus reducing noise intensity. The shape of the noise-absorbing hole assembly 9 can be circular, square, elliptical, quincunx-shaped, polygonal, or any other shape.

[0051] In some embodiments, the silencing hole assembly 9 is composed of one shape or a combination of multiple shapes. The silencing hole assembly 9 can be composed of a combination of one shape or a combination of multiple shapes, thereby improving the noise reduction effect of the silencing cover 2.

[0052] In some embodiments, the gap between the soundproof cover 2 and the container 1 can be filled with a filler such as glass glue or foam. After the gap is sealed with the filler, the noise reduction effect is more obvious.

[0053] In some embodiments, when container 1 is in a resting state, the detected volume is approximately 36 decibels; when container 1 is operating without the soundproof cover 2, the detected volume at close range is approximately 81 decibels, and at a distance it is approximately 61 decibels; when container 1 is operating with the soundproof cover 2 installed, the detected volume at close range is approximately 68 decibels, and at a distance it is approximately 37 decibels; where "distance" refers to a distance of more than 20m-30m from container 1. From the above comparison, it can be seen that the noise level generated at a distance with the soundproof cover 2 installed on container 1 is close to the white noise level when container 1 is in a resting state. The above data are affected by environmental factors (wind), and the values ​​are all a few decibels higher, with a relatively large fluctuation range.

[0054] Reference Figure 4 and Figure 5 A fixing frame 13 is installed between the container 1 and the soundproof cover 2. The fixing frame 13 includes a first fixing part 14 fixed to the soundproof cover 2 and a second fixing part 15 fixed to the container 1. An installation block 16 is installed on the side of the container 1 near the second fixing part 15. An installation groove 17 for the installation block 16 to be embedded is opened on the side of the second fixing part 15 near the installation block 16.

[0055] In this embodiment, the container 1 is fixed by a combination of corrugated plates. In order to reduce the air leakage between the soundproof cover 2 and the diameter of the container 1, the soundproof cover 2 is fixed to the container 1 by a fixing frame 13. The fixing frame 13 is fixed to the soundproof cover 2 by a first fixing part 14 and fixed to the container 1 by a second fixing part 15. The second fixing part 15 has a mounting groove 17 that matches the mounting block 16 on the container 1, thereby reducing the air leakage of the soundproof cover 2.

[0056] Reference Figure 6 and Figure 7 The exhaust shroud 4 has a mounting hole 21 on the side near the container 1, and the exhaust shroud 4 is fixed to the container 1 by self-tapping screws 22 that mate with the mounting hole 21. In this embodiment, the exhaust shroud 4 is fixed to the container 1 by self-tapping screws 22 that mate with the mounting hole 21, which improves the stability of the exhaust shroud 4 when installed on the container 1.

[0057] The implementation principle of a noise reduction device for an energy storage power station according to an embodiment of this application is as follows: The airflow generated by the fan inside the container 1 passes through the air inlet 5, the air outlet hood 4, and the air outlet 6 in sequence before entering the noise reduction chamber 3. The airflow also carries sound waves into the noise reduction chamber 3. The high-speed airflow has a longer path inside the noise reduction hood 2, which slows down the wind speed, thereby reducing the impact of the wind on external obstacles and reducing the amplitude of the vibration of the obstacles. At the same time, the noise reduction material 7 installed on the inner wall of the noise reduction hood 2 has high-efficiency sound absorption performance, which reduces the sound energy reflected by the sound waves and reduces noise pollution. The noise reduction plate 8 installed inside the noise reduction hood 2 has a group of noise reduction holes 9. The main principle is to use the structure of small holes to reduce noise and eliminate resonance. Since the noise reduction plate 8 is arranged in a wave-shaped interval inside the noise reduction hood 2, the sound waves undergo multiple refractions during the flow process to achieve the purpose of consuming energy, thereby absorbing and attenuating the sound energy and greatly improving its noise reduction effect. This improves the noise pollution generated by the energy storage power station to the surrounding environment.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A noise reduction device for an energy storage power station, comprising a container (1), characterized in that, A soundproof cover (2) is provided on the container (1). The outer wall of the container (1) and the inner wall of the soundproof cover (2) form a soundproof chamber (3) with an opening (23). An air outlet cover (4) is provided inside the soundproof chamber (3). The air outlet cover (4) is located on the container (1). One end of the air outlet cover (4) near the container (1) is an air inlet (5), and the other end of the air outlet cover (4) is an air outlet (6). The airflow from the air outlet (6) is directed towards the container (1). The opening (23) is connected to the silencing chamber (3), and the inner wall of the silencing cover (2) is provided with silencing material (7); the silencing chamber (3) is provided with several silencing plates (8), one end of the silencing plate (8) is provided on the inner wall of the silencing cover (2), and the other end of the silencing plate (8) is provided on the outer wall of the container (1). Several silencing plates (8) are arranged in a wavy pattern, and several groups of silencing holes (9) are provided on the silencing plate (8).

2. The noise reduction device for an energy storage power station according to claim 1, characterized in that, The silencing hole group (9) includes a first silencing channel (10), a second silencing channel (11) and a third silencing channel (12). The diameter of the first silencing channel (10) is smaller than the diameter of the second silencing channel (11), and the diameter of the second silencing channel (11) is smaller than the diameter of the third silencing channel (12).

3. The noise reduction device for an energy storage power station according to claim 1, characterized in that, The shape of the silencing hole group (9) is either a regular shape or a matching irregular shape.

4. The noise reduction device for an energy storage power station according to claim 1, characterized in that, The silencing hole group (9) is a combination of one shape or multiple shapes.

5. The noise reduction device for an energy storage power station according to claim 1, characterized in that, A fixing frame (13) is provided between the container (1) and the soundproof cover (2). The fixing frame (13) includes a first fixing part (14) fixed to the soundproof cover (2) and a second fixing part (15) fixed to the container (1). A mounting block (16) is provided on the side of the container (1) near the second fixing part (15). A mounting groove (17) for the mounting block (16) to be embedded is provided on the side of the second fixing part (15) near the mounting block (16).

6. The noise reduction device for an energy storage power station according to claim 1, characterized in that, The silencer (2) is provided with a first air guide surface (18) for directing the airflow toward the opening (23), and the air outlet (4) is provided with a second air guide surface (19) for directing the airflow toward the air outlet (6).

7. A noise reduction device for an energy storage power station according to claim 1, characterized in that, The inner wall of the air outlet (6) is provided with an insect-proof net (20).

8. A noise reduction device for an energy storage power station according to claim 1, characterized in that, The sound-absorbing material (7) is sound-absorbing cotton.

9. A noise reduction device for an energy storage power station according to claim 1, characterized in that, The air hood (4) is provided with a mounting hole (21) on the side near the container (1), and the air hood (4) is fixed to the container (1) by a self-tapping screw (22) that mates with the mounting hole (21).

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