Active and passive combined dynamic noise suppressor

Abstract

The utility model relates to an active and passive combined dynamic noise suppressor, which belongs to the technical field of noise reduction equipment, and comprises a noise reduction pipe, a plurality of noise reduction sounders and a flow guide cover, pipe orifices at two ends of the noise reduction pipe are arranged on a pipeline close to a noise source, sound absorption cotton is fixed on the inner wall of the noise reduction pipe, and a net plate is fixed on the inner wall of the sound absorption cotton; the noise reduction sounders are all arranged in the noise reduction pipe and fixed to the net plate, the noise reduction sounders form a noise reduction square matrix in an array mode in the axis direction of the noise reduction pipe, the sound production ends of the noise reduction sounders are all perpendicular to the axis direction of the noise reduction pipe, and the flow guide cover is fixed to the end, close to a noise source, of the noise reduction square matrix. The sound-absorbing cotton is installed on the inner wall of the noise reduction pipe firstly, and the net plate is fixed to the inner wall of the sound-absorbing cotton, so that noise in the pipeline can be reduced passively; meanwhile, a plurality of noise reduction sounders are fixed in the noise reduction pipe in an array mode to form a noise reduction square matrix, when noise passes through the noise reduction square matrix, the noise reduction sounders make sounds at the same time, and the noise in the pipeline can be actively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction equipment, in particular to an active and passive combined dynamic noise suppressor. Background Art

[0002] In production operations, many places need to be connected through pipelines to transport the medium to the destination. For example, when high-speed gas flows through the fresh air pipeline, the high-speed gas impacts the side wall of the pipeline and generates noise. In order to avoid the impact of noise on the surrounding environment, corresponding noise reduction devices need to be set up to achieve pipeline noise reduction.

[0003] In the related technology, there are two available pipeline noise reduction technologies: one is to set a rectifier in the pipeline, use the rectifier to adjust the flow rate and flow characteristics of the gas, and then reduce the impact of the gas on the pipeline to achieve the purpose of reducing noise; the other is to attach sound-absorbing materials such as sound-absorbing cotton on the outer surface of the pipeline, and use the buffering effect of the sound-absorbing cotton to reduce the impact of the noise in the pipeline on the surrounding environment.

[0004] However, adding a rectifier to the pipeline is not convenient for maintenance and will affect the normal use of the pipeline, and the actual use effect is poor; although the sound insulation is achieved by installing sound-absorbing cotton, it can remove some noise, but it cannot effectively remove some low-frequency noise generated in the pipeline.

[0005] Therefore, how to design a noise suppressor with simple structure, convenient disassembly and maintenance, and good noise reduction effect is a problem that technical personnel in this field need to solve urgently. Utility Model Content

[0006] The utility model provides an active and passive combined dynamic noise suppressor, which solves the technical problems that pipeline noise reduction devices are difficult to disassemble and assemble, inconvenient to maintain and have poor noise reduction effects.

[0007] The utility model solves the above technical problems with the following technical solutions: a dynamic noise suppressor combining active and passive functions, comprising: a noise reduction pipe, a plurality of noise reduction sound generators and a deflector,

[0008] The noise reduction pipe is installed on a pipe close to the noise source and sound-absorbing cotton is fixed on the inner wall, and a mesh plate is fixed on the inner wall of the sound-absorbing cotton; a plurality of noise reduction sounders are placed in the noise reduction pipe and fixed on the mesh plate, and a plurality of noise reduction sounders are arranged in an array along the axial direction of the noise reduction pipe to form a noise reduction matrix, and the sounding ends of the plurality of noise reduction sounders are arranged perpendicular to the axial direction of the noise reduction pipe; the air guide cover is fixed on the end of the noise reduction matrix close to the noise source.

[0009] The beneficial effects of the utility model are:

[0010] 1. First, install sound-absorbing cotton on the inner wall of the noise reduction pipe, and fix the mesh plate on the inner wall of the sound-absorbing cotton to passively reduce the noise in the pipe; at the same time, fix multiple noise reduction sounders in an array inside the noise reduction pipe to form a noise reduction array. When the noise passes through the noise reduction array, multiple noise reduction generators sound at the same time, which can actively reduce the noise in the pipe;

[0011] 2. Since the noise reduction array is composed of multiple noise reduction sounders, different noise reduction arrays can be installed according to different noise reduction tube sizes to improve the adaptability of the dynamic noise suppressor;

[0012] 3. Fixing the deflector at the end of the noise reduction array close to the noise source can guide the direction of the sound flow in the pipeline and improve the noise reduction effect.

[0013] On the basis of the above technical solution, the present invention can also be improved as follows.

[0014] Furthermore, there are multiple air deflectors, and multiple noise reduction sound generators are arranged in an array along the axis direction perpendicular to the noise reduction tube to form multiple noise reduction arrays, and multiple air deflectors are respectively fixed on the ends of the multiple noise reduction arrays close to the noise source.

[0015] A further beneficial effect of adopting the above is that the noise reduction array is composed of multiple noise reduction sound generators, and different noise reduction arrays can be installed according to different noise reduction tube sizes to improve the adaptability of the dynamic noise suppressor.

[0016] Furthermore, the noise reduction sounder includes a casing, a fixing, a speaker and a microphone. The casing is located in the noise reduction tube and fixed on the mesh plate. The casing is provided with a plurality of evenly distributed sound outlet holes at both ends arranged along a direction perpendicular to the axis of the noise reduction tube. There are three fixings and they are fixed in the casing at intervals along a direction perpendicular to the axis of the noise reduction tube. The three fixings are provided with fixing holes arranged oppositely. The speaker is fixed in the fixing hole of the middle fixing. There are two microphones and they are respectively fixed in the fixing holes of the fixings on both sides.

[0017] Furthermore, the fixing members on both sides are respectively close to two ends of the casing arranged along a direction perpendicular to the axis of the noise reduction pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a dynamic noise suppressor combining active and passive functions according to the utility model;

[0019] Figure 2 The utility model is a longitudinal section structure schematic diagram of a dynamic noise suppressor combining active and passive functions.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Noise reduction tube, 2. Noise reduction speaker, 21. Housing, 22. Fixing parts, 23. Speaker, 24. Microphone, 3. Air guide cover, 4. Sound-absorbing cotton, 5. Mesh plate. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] like Figure 1 and Figure 2 As shown, a dynamic noise suppressor combining active and passive functions comprises: a noise reduction tube 1, a plurality of noise reduction sound generators 2 and a deflector 3,

[0024] The noise reduction pipe 1 is installed on a pipe close to the noise source and sound-absorbing cotton 4 is fixed on the inner wall, and a mesh plate 5 is fixed on the inner wall of the sound-absorbing cotton 4; multiple noise reduction sounders 2 are placed in the noise reduction pipe 1 and fixed on the mesh plate 5, and multiple noise reduction sounders 2 are arranged in an array along the axial direction of the noise reduction pipe 1 to form a noise reduction array, and the sound-emitting ends of the multiple noise reduction sounders 2 are arranged perpendicular to the axial direction of the noise reduction pipe 1; the air guide cover 3 is fixed at the end of the noise reduction array close to the noise source.

[0025] In some specific embodiments, there may be multiple air deflectors 3, and multiple noise reduction generators 2 are arranged in an array along the axial direction perpendicular to the noise reduction tube 1 to form multiple noise reduction arrays, and multiple air deflectors 3 are respectively fixed at the ends of the multiple noise reduction arrays close to the noise source.

[0026] In some specific embodiments, the noise reduction sounder 2 may include a housing 21, a fixing part 22, a speaker 23 and a microphone 24. The housing 21 is located in the noise reduction tube 1 and fixed on the mesh plate 5. The housing 21 is provided with a plurality of evenly distributed sound outlet holes at both ends arranged along the axial direction of the noise reduction tube 1; there are three fixing parts 22 and they are fixed in the housing 21 at intervals along the axial direction of the noise reduction tube 1, and the three fixing parts 22 are provided with relatively arranged fixing holes; the speaker 23 is fixed in the fixing hole of the middle fixing part 22; there are two microphones 24 and they are respectively fixed in the fixing holes of the fixing parts 22 on both sides.

[0027] In some specific embodiments, the fixing members 22 on both sides may be respectively close to two ends of the housing 21 arranged along the direction perpendicular to the axis of the noise reduction tube 1 .

[0028] In some specific embodiments, the fixing members 22 on both sides may be made of polyurethane flame-retardant sound-absorbing cotton 4 material.

[0029] In some specific embodiments, the middle fixing member 22 can be made of metal material or ABS material.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dynamic noise suppressor combining active and passive functions, characterized in that: include: A noise reduction pipe (1), the noise reduction pipe (1) being installed on a pipeline close to a noise source and having sound-absorbing cotton (4) fixed on the inner wall, and a mesh plate (5) fixed on the inner wall of the sound-absorbing cotton (4); A plurality of noise reduction sound generators (2), wherein the plurality of noise reduction sound generators (2) are all placed in the noise reduction pipe (1) and fixed on the mesh plate (5), the plurality of noise reduction sound generators (2) are arranged in an array along the axial direction of the noise reduction pipe (1) to form a noise reduction matrix, and the sound-generating ends of the plurality of noise reduction sound generators (2) are arranged perpendicular to the axial direction of the noise reduction pipe (1); A flow guide cover (3), wherein the flow guide cover (3) is fixed at an end of the noise reduction array close to the noise source.

2. The active and passive combined dynamic noise suppressor according to claim 1, characterized in that: There are a plurality of air deflectors (3), and the plurality of noise reduction sound generators (2) are arranged in an array along an axial direction perpendicular to the noise reduction pipe (1) to form a plurality of noise reduction square arrays. The plurality of air deflectors (3) are respectively fixed at the ends of the plurality of noise reduction square arrays close to the noise source.

3. The active and passive combined dynamic noise suppressor according to claim 1, characterized in that: The noise reduction sound generator (2) comprises a housing (21), a fixing member (22), a speaker (23) and a microphone (24); the housing (21) is located in the noise reduction pipe (1) and fixed on the mesh plate (5); the housing (21) is provided with a plurality of evenly distributed sound outlet holes at two ends arranged along a direction perpendicular to the axis of the noise reduction pipe (1); the fixing members (22) are three and fixed in the housing (21) at intervals along a direction perpendicular to the axis of the noise reduction pipe (1); the three fixing members (22) are provided with fixing holes arranged opposite to each other; the speaker (23) is fixed in the fixing hole of the middle fixing member (22); the microphone (24) is two and fixed in the fixing holes of the fixing members (22) on both sides respectively.

4. The active and passive combined dynamic noise suppressor according to claim 3, characterized in that: The fixing members (22) on both sides are respectively close to two ends of the casing (21) arranged in a direction perpendicular to the axis of the noise reduction pipe (1).

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