Fan noise reduction device for urban subway tunnel construction

Abstract

The utility model discloses a fan noise reduction device for urban subway tunnel construction, which belongs to the technical field of tunnel construction and comprises a fan, a connecting pipe, a silencer and an air pipe which are sequentially connected, the fan, the connecting pipe and the silencer are arranged on the same horizontal plane, and the air pipe is vertically arranged relative to the silencer. The silencer is composed of a box body and a silencing plate, and the silencing plate is embedded in the box body and is of a multi-layer structure in the vertical direction of the box body. A shell plate, a sound absorption layer, a protection layer and a surface protection hole layer are sequentially arranged on the wall face of the box body from outside to inside, and the single-layer sound attenuation plate is sequentially provided with an upper surface protection hole layer, an upper protection layer, a middle sound absorption layer, a lower protection layer and a lower surface protection hole layer from top to bottom. The fan noise reduction device is compact in structure, clear in gradation, capable of effectively reducing fan noise and solving the noise pollution problem of a construction site and the surrounding environment, and suitable for noise control in urban subway tunnel construction.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction and provides a fan noise reduction device for urban subway tunnel construction. Background Art

[0002] With the expansion of urbanization, urban rail transit projects have become the main means to expand underground space and improve public transportation capacity with their advantages of convenience, efficiency and strong transportation capacity, and a large number of subway projects have been started. Most subway stations and their construction sites are located in the main urban areas and core areas of the city, and are mostly surrounded by commercial circles, landscape areas, residential areas, etc., with high population density and busy traffic. In the environmental noise emission standards for urban construction sites, the noise emission limit during the day (6:00-22:00) is 70db, and the noise emission limit at night (22:00-6:00) is 55db. However, the noise generated by some fans in actual engineering construction will exceed the corresponding standard, seriously polluting the sound environment in the surrounding areas and construction sites, and adversely affecting the normal life and health of residents. Therefore, how to effectively reduce the noise of the fan without affecting the air supply performance of the fan has become a technical problem, and an innovative way of making a silencer is urgently needed to form a noise reduction device for the construction fan of an urban subway tunnel. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a fan noise reduction device for urban subway tunnel construction to solve the problem of fan noise reduction.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] The utility model provides a noise reduction device for a fan in an urban subway tunnel construction, comprising a fan, a pipe, a silencer and an air duct connected in sequence, wherein the fan, the pipe and the silencer are arranged at the same level; the silencer is composed of a box body and a silencer plate, wherein the silencer plate is embedded in the box body and is arranged as a multi-layer structure in the vertical direction of the box body; the wall surface of the box body is arranged in sequence from the outside to the inside as a shell plate, a sound absorbing layer, a protective layer and a face shield hole layer, and the single-layer silencer plate is arranged in sequence from top to bottom as an upper face shield hole layer, an upper protective layer, a middle sound absorbing layer, a lower protective layer and a lower face shield hole layer, wherein the sound absorbing layer can effectively absorb the noise generated by the fan, reduce the propagation and diffusion of the noise, and the protective layer can protect the sound absorbing layer from damage and extend its service life; the face shield hole layer plays a role in ventilation and air permeability, and serves as a skeleton support. This clearly layered design can effectively absorb and reduce the noise generated by the fan, and protect the quietness of the surrounding environment. The above scheme can effectively reduce the noise generated by the fan in the construction of the urban subway tunnel, improve the environmental quality of the subway tunnel construction site, and reduce the noise interference to the surrounding residents and construction personnel. At the same time, the multi-layer sound-absorbing structure of the silencer can better absorb and isolate noise and improve the noise reduction effect.

[0006] Optionally, the inner wall of the pipe is provided with a sound absorbing layer, a protective layer and a face shielding hole layer in sequence; and the inner wall of the air duct is provided with a sound absorbing layer, a protective layer and a face shielding hole layer in sequence. This design can further improve the noise reduction effect of the entire fan noise reduction device and ensure the quietness of the construction site and the surrounding environment.

[0007] Optionally, the sound-absorbing layer is made of glass fiber sound insulation cotton, which has good sound absorption performance and can effectively absorb the noise generated by the fan; the protective layer is made of polypropylene non-woven fabric, which has moisture-proof, breathable and flame-retardant properties, and can protect the sound-absorbing layer from damage; the faceplate surface is made of porous galvanized steel plate, which has good corrosion resistance and wear resistance, and has good air permeability, which can ensure the ventilation and air permeability of the device. The selection of these materials can effectively improve the performance and service life of the fan noise reduction device, ensure its effective noise reduction in urban subway tunnel construction, and provide a quieter and more comfortable construction and living environment for the surrounding environment.

[0008] Optionally, the thickness of the sound-absorbing layer of the sound-absorbing board is greater than the thickness of the sound-absorbing layer of the box, the air duct and the connecting pipe. By increasing the thickness of the sound-absorbing layer of the sound-absorbing board, the amount and density of the sound-absorbing material can be increased, the sound-absorbing effect can be further improved, and the service life can be extended. At the same time, the thinner sound-absorbing layer design on the box, the air duct and the connecting pipe can reduce the overall weight of the muffler.

[0009] Optionally, the pipe is integrated with the muffler. By integrating the pipe and the muffler together, the integrated design can improve the stability and reliability of the entire system, reduce the possibility of air leakage and noise leakage, and ensure the normal operation and noise reduction effect of the system.

[0010] Optionally, the single-layer muffler is spherical, and the convex surface of the spherical muffler faces the air duct. By adopting a spherical design, the acoustic characteristics of the muffler can be changed to a certain extent, making it more effective in reflecting and absorbing noise. The spherical design can also increase the surface area of ​​the muffler, improve the sound absorption effect, and help to evenly distribute and diffuse noise, further reducing noise propagation.

[0011] The beneficial effects of the utility model are as follows: the fan noise reduction device of the utility model has a compact structure and clear layers, can effectively reduce fan noise, improve the noise pollution problem of the construction site and the surrounding environment, and is suitable for noise control in urban subway tunnel construction.

[0012] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0014] Figure 1 This is a front structural diagram of the utility model of the urban subway tunnel construction fan noise reduction device;

[0015] Figure 2 for Figure 1 A magnified schematic diagram of part A in FIG.

[0016] Figure 3 for Figure 1 Another structural schematic diagram of the muffler plate;

[0017] Reference numerals: fan 1 , connecting pipe 2 , silencer 3 , air duct 4 ; box body 31 , silencer plate 32 ; shell plate 311 , sound absorbing layer 312 , protective layer 313 , face shield panel 314 . DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0019] like Figure 1-2 As shown, the utility model mentions a noise reduction device for a fan in an urban subway tunnel construction, comprising a fan 1, a connecting pipe 2, a silencer 3 and an air duct 4 connected in sequence, wherein: the fan 1, the connecting pipe 2 and the silencer 3 are arranged at the same level, and the air duct 4 is arranged vertically relative to the silencer 3, which can effectively reduce the propagation and diffusion of noise and improve the noise reduction effect; and the silencer 3 is composed of a box body 31 and a silencer plate 32, and the silencer plate 32 is embedded in the box body 31 and is arranged as a multi-layer structure in the vertical direction of the box body 31. This design can increase the sound absorption and sound insulation effects. For example, the size of the air duct 4 in this example is 900×900×1920mm, and the size of the silencer 3 is 1500×1500×1500mm. A layer of 1500×1500×60mm silencer plate 32 is installed every 0.5m in height in the box body 31, and the connecting pipe 2 can be integrated on the silencer 3, and the two are connected. Integration together can not only simplify the installation process, reduce the number of connecting parts and interfaces, improve installation efficiency and reduce installation time, but also improve the stability and reliability of the entire system, reduce the possibility of air leakage and noise leakage, and ensure the normal operation and noise reduction effect of the system, that is, the silencer 3 is connected to the fan 1 with 20 M10 bolts, and the circumferential spacing is 15 cm, which can meet the use conditions; and the wall surface of the box body 31 is sequentially arranged from the outside to the inside as a shell plate 311, a sound absorbing layer 312, a protective layer 313 and a face shield hole layer 314, and the single-layer silencer board 32 is sequentially arranged from top to bottom as an upper face shield hole layer 314, an upper protective layer 313, a middle sound absorbing layer 312, a lower protective layer 313 and a lower face shield hole layer 314, that is, the silencer board 32 is sequentially covered with a protective layer 313 and a face shield hole layer 314 on the upper and lower surfaces of the sound absorbing layer 312. In this way, the sound-absorbing layer 312 is made of glass fiber sound insulation cotton, which has good sound absorption performance, can effectively absorb the noise generated by the fan, and reduce the propagation and diffusion of noise; the protective layer 313 is made of polypropylene non-woven fabric, which has moisture-proof, breathable and flame-retardant properties, can protect the sound-absorbing layer from damage and extend its service life; the face shield surface layer 314 is made of 4mm porous galvanized steel plate, which has good corrosion resistance and wear resistance, and has good air permeability, which can ensure the ventilation and air permeability of the device. The above scheme can effectively reduce the noise generated by the fan in the construction of urban subway tunnels, improve the environmental quality of the subway tunnel construction site, and reduce noise interference to surrounding residents and construction workers. At the same time, the multi-layer sound-absorbing structure of the silencer can better absorb and isolate noise and improve the noise reduction effect.

[0020] In this embodiment, the inner walls of the connecting pipe 2 and the air duct 4 are sequentially provided with a sound absorbing layer 312, a protective layer 313 and a protective surface layer 314. The noise reduction effect of the entire fan noise reduction device can be further improved to ensure the quietness of the construction site and the surrounding environment.

[0021] In this embodiment, the thickness of the sound absorbing layer of the sound-absorbing plate 32 is greater than that of the box 31, the air duct 4 and the connecting pipe 2. In this way, by increasing the thickness of the sound absorbing layer of the sound-absorbing plate, the amount and density of the sound absorbing material can be increased, the sound absorbing effect can be further improved, and the service life can be extended. At the same time, the sound absorbing layer on the box, the air duct and the connecting pipe is designed to be thinner, which can reduce the overall weight of the muffler.

[0022] like Figure 3 As shown, in another embodiment, the single-layer muffler plate 32 is spherical, and the convex surface of the spherical muffler plate faces the air duct 4. In this way, by adopting a spherical design, the acoustic characteristics of the muffler can be changed to a certain extent, so that it can more effectively reflect and absorb noise. The spherical design can also increase the surface area of ​​the muffler plate, improve the sound absorption effect, and help to evenly distribute and diffuse noise, further reducing noise propagation.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A noise reduction device for fans in urban subway tunnel construction, characterized in that: The invention comprises a fan (1), a pipe (2), a silencer (3) and an air duct (4) connected in sequence, wherein the fan (1), the pipe (2) and the silencer (3) are arranged at the same level, and the air duct (4) is arranged vertically relative to the silencer (3); the silencer (3) is composed of a box (31) and a silencer plate (32); the silencer plate (32) is embedded in the box (31) and is arranged in a multi-layer structure in the vertical direction of the box (31); the wall surface of the box (31) is arranged in sequence from the outside to the inside as a shell plate (311), a sound absorbing layer (312), a protective layer (313) and a face shield hole layer (314); the single-layer silencer plate (32) is arranged in sequence from top to bottom as an upper face shield hole layer (314), an upper protective layer (313), a middle sound absorbing layer (312), a lower protective layer (313) and a lower face shield hole layer (314).

2. The urban subway tunnel construction fan noise reduction device according to claim 1 is characterized in that: A sound absorbing layer (312), a protective layer (313) and a face shielding layer (314) are sequentially arranged on the inner wall of the connecting pipe (2).

3. The urban subway tunnel construction fan noise reduction device according to claim 1 is characterized in that: A sound absorbing layer (312), a protective layer (313) and a face shield layer (314) are sequentially arranged on the inner wall of the air duct (4).

4. The urban subway tunnel construction fan noise reduction device according to any one of claims 1 to 3, characterized in that: The sound-absorbing layer is made of glass fiber sound-insulating cotton; the protective layer is made of polypropylene non-woven fabric; and the face shield surface is made of porous galvanized steel plate.

5. The urban subway tunnel construction fan noise reduction device according to claim 4 is characterized in that: The thickness of the sound absorbing layer of the sound-absorbing plate (32) is greater than the thickness of the sound absorbing layers of the box body (31), the air duct (4) and the connecting pipe (2).

6. The urban subway tunnel construction fan noise reduction device according to claim 1 is characterized in that: The pipe (2) is integrated on the silencer (3).

7. The urban subway tunnel construction fan noise reduction device according to claim 1 is characterized in that: The single-layered silencer plate (32) is spherical, and the convex surface of the spherical silencer plate faces the air duct (4).

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