Noise-proof substation equipment ventilation muffler

Abstract

This utility model relates to the field of noise reduction technology for substation equipment, and discloses a noise-reducing ventilation silencer for substation equipment. It includes a silencer shell body, which is a flat cylindrical structure with a connecting pipe at one end connected to a noise source in the substation. A protective cage is connected to the other end of the silencer shell body. The connecting pipe and the silencer shell body are connected via a diversion pipe unit. The silencer shell body contains a high- and low-frequency noise reduction unit with multiple chambers for separately reducing high- and low-frequency noise in the airflow. Compared with existing technologies, its advantages are: the segmented design of the high- and low-frequency noise reduction unit, combined with noise reduction holes of different diameters, allows for targeted treatment of high-frequency and low-frequency noise; the three-pronged diversion pipe of the diversion pipe unit, combined with a square array of tubes, achieves uniform airflow diversion and deceleration, reducing airflow resistance and secondary noise, thus balancing noise reduction and ventilation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology for substation equipment, specifically to a noise-proof ventilation silencer for substation equipment. Background Technology

[0002] Substation equipment generates continuous noise during operation, including high-frequency mechanical noise and low-frequency electromagnetic noise. If not effectively managed, this can easily cause noise pollution. Ventilation silencers are key equipment for noise reduction in substations, and they must ensure the equipment's ventilation and heat dissipation needs while achieving noise reduction. However, existing substation ventilation silencers generally suffer from the following problems:

[0003] Traditional silencers are mostly designed for single-frequency noise and cannot efficiently handle mixed high and low frequency noise at the same time, resulting in incomplete noise reduction and some frequency noise still exceeding the standard. The ventilation channel and noise reduction structure are not coordinated, and the airflow resistance is large when passing through, which can easily affect the ventilation and heat dissipation efficiency of substation equipment and even cause equipment overheating failure. Utility Model Content

[0004] The technical problem to be solved by this utility model is that existing substation equipment ventilation silencers have problems such as incomplete high and low frequency noise reduction and poor coordination between ventilation and noise reduction. It can achieve separate and efficient noise reduction of high and low frequency noise while ensuring smooth ventilation, thereby improving the noise control effect of substations.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A noise-reducing substation equipment ventilation silencer includes a sound-absorbing shell body, which is a flat cylindrical structure. One end of the sound-absorbing shell body is provided with a connecting pipe, which is connected to the noise source of the substation. The other end of the sound-absorbing shell body is connected to a protective cage.

[0007] The connecting pipe is connected to the main body of the silencing shell through a diversion pipe unit. The main body of the silencing shell is equipped with a high and low frequency noise reduction unit. The high and low frequency noise reduction unit has multiple chambers for separately reducing the noise of high and low frequency bands in the airflow.

[0008] As an improvement, the diversion tube unit includes a three-pronged diversion tube disposed on and connected to the connecting tube. The three-pronged diversion tube is connected to a square array tube bundle disposed at the end of the sound-absorbing shell body. The three-pronged diversion tube can divide the airflow introduced by the connecting tube into three streams, and then evenly disperse them into the interior of the sound-absorbing shell body through the square array tube bundle, thereby improving the contact efficiency between the airflow and the noise reduction structure.

[0009] As an improvement, the high and low frequency noise reduction unit includes a low frequency noise reduction cylinder integrally formed along the three-way splitter tube and disposed within the sound-absorbing shell body, and a high frequency noise reduction cylinder integrally formed along the square array tube bundle and disposed within the sound-absorbing shell body. The low frequency noise reduction cylinder has several noise reduction holes I that communicate with the inner cavity of the sound-absorbing shell body evenly distributed on it, and the high frequency noise reduction cylinder has several noise reduction holes II that communicate with the inner cavity of the sound-absorbing shell body evenly distributed on it. Through the cooperation of different noise reduction cylinders and corresponding noise reduction holes, targeted processing of high and low frequency noise can be achieved.

[0010] As an improvement, both ends of the silencing shell are provided with sealing plates, and the sealing plates are sealed to the high-frequency noise reduction cylinder and the low-frequency noise reduction cylinder, which can prevent airflow from leaking from both ends of the silencing shell and ensure that the noise is completely processed by the noise reduction unit; and the ends of the high-frequency noise reduction cylinder and the low-frequency noise reduction cylinder extend into the protective cage after passing through the sealing plate at one end, so that the noise-reduced airflow can be directly discharged into the protective cage.

[0011] As an improvement, the aperture of the first noise reduction hole is larger than that of the second noise reduction hole, which is adapted to the characteristics of long wavelength of low-frequency noise and short wavelength of high-frequency noise, thereby improving the noise reduction efficiency of different frequency bands; a gap is left between the high-frequency noise reduction cylinder and the low-frequency noise reduction cylinder for sound wave transmission, ensuring that noise can be fully diffused between different noise reduction cylinders and avoiding local noise accumulation.

[0012] As an improvement, the diameter of the three-way splitter is larger than the diameter of the square array tube bundle, and the junction of the two is located at the end of the three-way splitter near the connecting tube.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] 1. This utility model, through the segmented design of high and low frequency noise reduction units and combined with noise reduction holes of different diameters, can target high-frequency and low-frequency noise respectively, solve the problem of incomplete noise reduction of traditional silencers, and significantly improve the overall noise reduction effect.

[0015] 2. The three-pronged diverter of the diverter unit of this utility model, in combination with the square array tube bundle, can achieve uniform airflow diversion and deceleration, reduce airflow resistance and secondary noise, and take into account both noise reduction function and ventilation efficiency, so as to ensure the heat dissipation requirements of substation equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the appearance of this utility model.

[0017] Figure 2 This is a cross-sectional view of the present invention. Figure 1 .

[0018] Figure 3 This is a cross-sectional view of the present invention. Figure 2 .

[0019] Figure 4 This is a cross-sectional view of the present invention. Figure 3 .

[0020] As shown in the figure: 1. Silencing shell body; 2. Connecting pipe; 3. Protective cage; 4. Diverter unit; 41. Three-way diverter; 42. Square array tube bundle; 5. High and low frequency noise reduction unit; 51. Low frequency noise reduction cylinder; 52. High frequency noise reduction cylinder; 53. Noise reduction hole one; 54. Noise reduction hole two; 6. Sealing plate. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] Please see the appendix Figure 1 Appendix Figure 2 As shown, a noise-reducing substation equipment ventilation silencer includes a silencer housing body 1, which is made of 304 stainless steel. A connecting pipe 2 is welded to one end of the silencer housing body 1. The connecting pipe 2 is made of Q235 carbon steel and its inner diameter is adapted to the exhaust port of the substation noise source for easy direct connection. A protective cage 3 is fixed to the other end of the silencer housing body 1 by bolts, which protects the internal structure while not obstructing the airflow.

[0024] A diversion pipe unit 4 is welded between the connecting pipe 2 and the sound-absorbing shell body 1. The diversion pipe unit 4 includes a three-pronged diversion pipe 41 and a square array tube bundle 42. One end of the three-pronged diversion pipe 41 is welded to the connecting pipe 2, and the other end is divided into three branches and welded to the square array tube bundle 42. The intersection of the square array tube bundle 42 and the three-pronged diversion pipe 41 is located near the connecting pipe 2 of the three-pronged diversion pipe 41 to ensure uniform airflow.

[0025] See appendix Figure 3 Appendix Figure 4 As shown, the main body 1 of the silencing shell is equipped with a high- and low-frequency noise reduction unit 5. The high- and low-frequency noise reduction unit 5 includes a low-frequency noise reduction cylinder 51 and a high-frequency noise reduction cylinder 52. Both are made of the same 304 stainless steel as the main body 1 of the silencing shell, and are integrally formed with the three-way splitter pipe 41 and the square array tube bundle 42, respectively. Noise reduction holes 1 53 with a diameter of 8mm are evenly opened on the low-frequency noise reduction cylinder 51, and noise reduction holes 2 54 with a diameter of 4mm are evenly opened on the high-frequency noise reduction cylinder 52. A gap is left between the high-frequency noise reduction cylinder 52 and the low-frequency noise reduction cylinder 51 for sound wave transmission and airflow. Both ends of the silencing shell body 1 are provided with sealing plates 6. The sealing plates 6 are sealed and fitted to the inner wall of the silencing shell body 1 through sealing rings, and are welded and sealed to the outer walls of the high-frequency noise reduction cylinder 52 and the low-frequency noise reduction cylinder 51. The ends of the high-frequency noise reduction cylinder 52 and the low-frequency noise reduction cylinder 51 pass through the sealing plate 6 on the side close to the protective cage 3 and extend into the protective cage 3 by 10mm, ensuring that the airflow after noise reduction directly enters the protective cage 3.

[0026] In specific implementation of this utility model: the free end of the connecting pipe 2 is fixedly connected to the exhaust port of the substation noise source by flange bolts to ensure that the connection is sealed and leak-free. The noisy airflow generated by the substation enters the three-way split pipe 41 through the connecting pipe 2. After being divided into three streams by the three-way split pipe 41, the airflow enters the square array tube bundle 42 evenly. The airflow then flows into the low-frequency noise reduction tube 51 and the high-frequency noise reduction tube 52 respectively. The low-frequency noise enters the inner cavity of the sound-absorbing shell body 1 through the noise reduction hole 53 of the low-frequency noise reduction tube 51, and the low-frequency sound waves are canceled by the cavity resonance effect. The high-frequency noise enters the inner cavity of the sound-absorbing shell body 1 through the noise reduction hole 54 of the high-frequency noise reduction tube 52, and the high-frequency sound waves are weakened by the small hole noise reduction principle. The airflow after being noise-reduced separately merges in the gap between the high-frequency noise reduction tube 52 and the low-frequency noise reduction tube 51, and finally exits through the end of the noise reduction tube that extends into the protective cage 3, completing the integrated process of "ventilation-noise reduction".

[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A noise-reducing substation equipment ventilation silencer, comprising a sound-absorbing housing body (1), characterized in that: The main body (1) of the silencing shell is a flat cylindrical structure with a connecting pipe (2) at one end. The connecting pipe (2) is connected to the noise source of the substation, and a protective cage (3) is connected to the other end of the silencing shell main body (1). The connecting pipe (2) is connected to the sound-absorbing shell body (1) through a shunt pipe unit (4). The sound-absorbing shell body (1) is provided with a high- and low-frequency noise reduction unit (5). The high- and low-frequency noise reduction unit (5) is provided with multiple chambers for separately reducing noise in the high- and low-frequency bands.

2. A noise-protected substation equipment ventilation silencer according to claim 1, characterized in that: The diversion tube unit (4) includes a three-way diversion tube (41) disposed on and connected to the connecting tube (2), and the three-way diversion tube (41) is connected to the square array tube bundle (42) disposed at the end of the sound-absorbing shell body (1).

3. A noise-proof substation equipment ventilation muffler according to claim 1, characterized in that: The high and low frequency noise reduction unit (5) includes a low frequency noise reduction cylinder (51) integrally formed along the three-way splitter pipe (41) and disposed in the sound-absorbing shell body (1), and a high frequency noise reduction cylinder (52) integrally formed along the square array tube bundle (42) and disposed in the sound-absorbing shell body (1). The low frequency noise reduction cylinder (51) has a number of noise reduction holes (53) that communicate with the inner cavity of the sound-absorbing shell body (1) evenly distributed on it, and the high frequency noise reduction cylinder (52) has a number of noise reduction holes (54) that communicate with the inner cavity of the sound-absorbing shell body (1) evenly distributed on it.

4. A noise-protected substation equipment ventilation silencer according to claim 3, characterized in that: The sound-absorbing shell body (1) is provided with sealing plates (6) at both ends. The sealing plates (6) are sealed to the high-frequency noise reduction cylinder (52) and the low-frequency noise reduction cylinder (51). The ends of the high-frequency noise reduction cylinder (52) and the low-frequency noise reduction cylinder (51) extend into the protective cage (3) after passing through the sealing plate (6) at one end.

5. A noise-proof substation equipment ventilation silencer according to claim 3, characterized in that: The aperture of the first noise reduction hole (53) is larger than that of the second noise reduction hole (54). There is a gap between the high-frequency noise reduction cylinder (52) and the low-frequency noise reduction cylinder (51) for sound wave transmission.

6. A noise-proof substation equipment ventilation silencer according to claim 2, characterized in that: The diameter of the three-way splitter (41) is larger than the diameter of the square array tube bundle (42), and the junction of the two is located at the end of the three-way splitter (41) near the connecting tube (2).

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