Noise reduction module and noise reduction device

Abstract

The utility model discloses a noise reduction module and a noise reduction device, the noise reduction module comprises a box body, the box body is internally provided with a plurality of mutually independent resonant cavities, and the resonant cavities have different resonant frequencies; each resonant cavity is provided with a communicating hole, and is communicated with the external environment only through the communicating hole; meanwhile, the utility model further discloses a noise reduction device which comprises a plurality of noise reduction modules, and the noise reduction modules are the same in structure. The communicating holes of all the noise reduction modules face the same face, and all the noise reduction modules are mutually stacked; during use, the communication hole of the noise reduction device just faces a noise source; compared with the prior art, the size structure of the resonance box is adjusted, so that the resonance box has the same frequency as a noise source, noise reduction is achieved in a resonance mode, the structure is simple, and cost is low; and meanwhile, simultaneous resonance noise reduction processing of a plurality of different resonance frequencies can be realized in a mode of arranging a plurality of independent resonant cavities, so that the noise reduction performance of the noise reduction module is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of noise control equipment, in particular to a noise reduction module and a noise reduction device. BACKGROUND

[0002] The main noise source of a transformer substation is a main transformer and a high-voltage shunt reactor. In the prior art, the noise generated by the above-mentioned equipment is usually isolated by a soundproof board. The soundproof board not only has a high cost, but also has a poor noise reduction effect. CONTENT

[0003] The main purpose of the present application is to provide a noise reduction module and a noise reduction device, which aims to solve the defect of poor noise reduction effect in the prior art.

[0004] The present application achieves the above-mentioned purpose by the following technical scheme:

[0005] A noise reduction module comprises,

[0006] A box body is provided with a plurality of independent resonance cavities in the box body, each of the resonance cavities has a different resonance frequency; each of the resonance cavities is provided with a communication hole, and only communicates with the external environment through the communication hole.

[0007] Optionally, at least one partition is arranged in the box body, and each of the partitions is arranged along the length direction of the box body.

[0008] Optionally, the box body is divided into a first resonance cavity and a second resonance cavity by a partition, the length of the first resonance cavity is 40-80mm, and the height of the first resonance cavity is 80-120mm; the length of the second resonance cavity is 40-80mm, and the height of the second resonance cavity is 80-120mm.

[0009] Optionally, along the length direction of the box body, a lower plate is arranged at one end of the box body, and an upper plate is arranged at the other end of the box body, the lower plate and the upper plate respectively seal the two ends of the box body; the communication hole is arranged on the upper plate.

[0010] Optionally, the aperture of the communication hole is 4-6mm.

[0011] Optionally, along the length direction of the box body, the upper plate is arranged in the box body, and the distance between the top surface of the upper plate and the end surface of the box body is 10-20mm.

[0012] Correspondingly, the present application also discloses a noise reduction device comprising a plurality of noise reduction modules, each of the noise reduction modules has the same structure; the communication holes of each of the noise reduction modules are arranged towards the same side, and each of the noise reduction modules is stacked with each other.

[0013] Optionally, the noise reduction device comprises a frame body, each of the noise reduction modules is stacked and filled in the frame body, and the communication holes of each of the noise reduction modules are arranged towards the same side along the width direction of the frame body.

[0014] Compared with the prior art, the application has the following beneficial effects:

[0015] The application comprises a box body, a plurality of independent resonance cavities are arranged in the box body, each of the resonance cavities has a different resonance frequency, a communication hole is arranged on each of the resonance cavities, and each of the resonance cavities communicates with the external environment only through the communication hole; and the application further discloses a noise reduction device comprising a plurality of noise reduction modules, each of the noise reduction modules has the same structure, the communication holes of each of the noise reduction modules are arranged towards the same side, and each of the noise reduction modules is stacked with each other; and when in use, the communication holes of the noise reduction device are directly opposite the noise source.

[0016] Compared with the prior art, the size and structure of the resonance box are adjusted so that the resonance box has the same frequency as the noise source, and then the noise reduction is realized through resonance, which not only has a simple structure and low cost, but also can realize simultaneous resonance noise reduction of multiple different resonance frequencies through the arrangement of multiple independent resonance cavities, thereby effectively improving the noise reduction performance of the noise reduction module. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 A structural schematic view of a noise reduction module is provided for the application;

[0018] Fig. 2 A sectional view of a noise reduction module is provided for the application;

[0019] Fig. 3 A structural schematic view of a noise reduction device is provided for the application;

[0020] The drawings show that: 1 is a box body, 2 is a resonance cavity, 3 is a communication hole, 4 is a partition plate, 5 is a lower plate, 6 is an upper plate, and 7 is a frame body.

[0021] The purpose of the application, functional characteristics and advantages will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the application.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0026] Embodiment 1

[0027] Reference Figs. 1-2 The present embodiment discloses a noise reduction module and a noise reduction device, which comprises a box body 1, the box body 1 is in the form of a rectangular parallelepiped as a whole, and one end of the box body 1 is sealed by a lower plate 5 along the length direction of the box body 1, and the other end is sealed by an upper plate 6.

[0028] It should be noted that along the length direction of the box body 1, the lower end surface of the lower plate 5 is flush with the lower end surface of the box body 1, and there is a certain gap between the upper end surface of the upper plate 6 and the upper end surface of the box body 1, and the above gap is 10-20mm.

[0029] At least one partition 4 is arranged in the box 1, each of the partitions 4 is arranged along the length direction of the box 1, and each of the partitions 4 can be arranged in parallel or perpendicularly to each other; the interior space of the box 1 is divided into several resonance cavities 2 by the partitions 4;

[0030] It is to be noted that one end of each of the partitions 4 is closely attached to the lower plate 5, and the other end is attached to the upper plate 6; thus, each of the resonance cavities 2 is completely isolated;

[0031] Each of the resonance cavities 2 is preferably a cuboid or a cube, and the size parameters of each of the resonance cavities 2 need to be determined according to the frequency of the noise to be reduced, that is, the resonance frequency of the resonance cavity 2 is controlled by adjusting the size of the resonance cavity 2, so that the resonance frequency of the resonance cavity 2 is the same as the frequency of the noise to be reduced, and then the noise is reduced by resonance;

[0032] Further, the resonance cavities 2 are at least two, and the two resonance cavities 2 have different resonance frequencies to correspond to different noises respectively; if there are three or even more high noise frequencies of the noise to be reduced, more resonance cavities 2 are arranged;

[0033] That is, the box 1 is provided with a partition 4, the partition 4 divides the box 1 into a first resonance cavity and a second resonance cavity, the length of the first resonance cavity is 40-80mm, and the height is 80-120mm; the length of the second resonance cavity is 40-80mm, and the height is 80-120mm; the width of the first resonance cavity and the second resonance cavity is obtained by computer fitting according to the frequency to be resonated;

[0034] Further, a plurality of communication holes 3 are arranged on the upper plate 6, the number of the communication holes 3 is the same as the number of the resonance cavities 2, and each of the communication holes 3 is in communication with each of the resonance cavities 2, that is, each of the resonance cavities 2 is in communication with the external environment through only one communication hole 3;

[0035] The aperture of each of the communication holes 3 is 4-6mm;

[0036] Further, the noise reduction module described in the application can be processed by 3D printing, which is beneficial to further reduce the cost of the equipment;

[0037] Through noise detection and noise control mode research on 500kV main transformer and high-voltage shunt reactor, detailed data of noise characteristics are obtained. Through frequency spectrum comparison and analysis of noise data, it is found that 500kV main transformer and high-voltage shunt reactor are mainly concentrated in low frequency band (usually below 500Hz): obvious peak values appear at 100Hz, 200Hz and 400Hz, and the frequencies are usually related to power frequency (50Hz) and its harmonics;

[0038] Based on the above parameters, the noise reduction module of the present application is specially designed. Compared with the prior art, by adjusting the size structure of the resonance box, it has the same frequency as the noise source, and then realizes noise reduction through resonance. It not only has simple structure and low cost, but also can realize simultaneous resonance noise reduction processing of multiple different resonance frequencies through the setting of multiple independent resonance cavities 2, effectively improving the noise reduction performance of the noise reduction module.

[0039] Embodiment 2

[0040] With reference to Fig. 3 The present application also discloses a noise reduction device, which comprises a frame body 8, the frame body 8 is in the form of a ring structure with a direction or a rectangle, and a plurality of noise reduction modules are arranged in the cavity of the frame body 8, each of the noise reduction modules is the noise reduction module of the embodiment 1.

[0041] Along the length and height direction of the cavity of the frame body 8, each of the noise reduction modules is arranged and stacked in sequence, and the cavity of the entire frame body 8 is filled;

[0042] Along the width direction of the frame body 8, the communication pipes 7 or the communication holes 3 on each of the noise reduction modules are arranged towards the same side; in actual use, the communication holes 3 are directly opposite the noise source;

[0043] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A noise reduction module, characterized in that, include, The housing (1) contains several independent resonant cavities (2), each of which has a different resonant frequency; each of the resonant cavities (2) is provided with a connecting hole (3), and is connected to the external environment only through the connecting hole (3); The box (1) is provided with at least one partition (4), and each partition (4) is arranged along the length direction of the box (1). Along the length direction of the box (1), a lower plate (5) is provided at one end of the box (1), and an upper plate (6) is provided at the other end. The lower plate (5) and the upper plate (6) respectively seal the two ends of the box (1). The connecting hole (3) is provided on the upper plate (6).

2. The noise reduction module according to claim 1, characterized in that, The housing (1) is divided into a first resonant cavity and a second resonant cavity by a partition (4). The length of the first resonant cavity is 40-80mm and the height is 80-120mm. The length of the second resonant cavity is 40-80mm and the height is 80-120mm.

3. The noise reduction module according to claim 1, characterized in that, The diameter of the connecting hole (3) is 4-6 mm.

4. A noise reduction module according to claim 1, characterized in that, Along the length of the box (1), the upper plate (6) is disposed inside the box (1), and the distance between the top surface of the upper plate (6) and the end face of the box (1) is 10-20mm.

5. A noise reduction device, characterized in that, It includes several noise reduction modules as described in any one of claims 1-4, each of the noise reduction modules having the same structure; the connecting holes (3) of each of the noise reduction modules are all arranged facing the same surface, and the noise reduction modules are stacked on top of each other.

6. The noise reduction device according to claim 5, characterized in that, The noise reduction device includes a frame (7), and each noise reduction module is stacked and filled inside the frame (7). Along the width direction of the frame (7), the connecting holes (3) of each noise reduction module are arranged facing the same side.

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