A noise reduction structure for an industrial fan

Abstract

The utility model discloses an industrial fan is with sound absorbing structure relates to industrial fan technical field, including fan body, the integratedly formed of fan body is equipped with the air outlet pipe, is equipped with the air inlet in fan body, the air inlet one side is equipped with the first sound absorbing component for the sound absorption of air inlet, the air outlet pipe upper end is equipped with the second sound absorbing component for the sound absorption of air outlet. The utility model sound absorption cotton carries out the absorption to the noise, and the second sound absorbing component inside adopts multiple separate sound absorbing units, and the noise is resolved and reduces, and the effect of noise reduction is obvious, and the staggered distribution's round hole can play a guide flow's effect to the wind direction and the volume, and the round hole makes the transmission direction of wind direction and volume change, and the external propagation of noise is more difficult, and the setting of double -layer sound absorbing board makes sound absorbing board can carry out multistage processing to the noise, can better carry out sound absorption.

Description

Technical Field

[0001] This utility model relates to the field of industrial fan technology, and in particular to a noise reduction structure for industrial fans. Background Technology

[0002] Industrial fans are key pieces of equipment specifically designed for ventilation, gas transport, and fire smoke extraction, and are widely used in metallurgy, chemical industry, power generation, construction, and other fields. Their core components include an impeller, casing, and motor. The impeller rotation generates airflow, enabling the intake, transport, or exhaust of air.

[0003] In existing technologies, when industrial fans blow air, the exhaust duct vibrates significantly under the influence of strong airflow, resulting in considerable noise at the exhaust duct and causing loud humming in the workplace, which affects the working environment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as excessive noise at the air outlet duct, and to propose a noise reduction structure for industrial fans.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution:

[0006] A noise reduction structure for an industrial fan includes a fan body, an air outlet pipe integrally formed on the fan body, an air inlet on the fan body, a first noise reduction component for noise reduction at the air inlet on one side of the air inlet, and a second noise reduction component for noise reduction at the air outlet on the upper end of the air outlet pipe.

[0007] Preferably, the first noise reduction component includes a filter plate, which is connected to the fan body by screws and completely covers the air inlet.

[0008] Preferably, the second silencing component includes a pair of silencing plates and a plurality of circular holes. The pair of silencing plates are fixedly installed inside the air outlet duct, and the plurality of circular holes are respectively opened on the pair of silencing plates. Noise reduction units for reducing noise are provided in the plurality of circular holes.

[0009] Preferably, the noise reduction unit includes multiple sound-absorbing cottons, which are respectively disposed in multiple circular holes. The sound-absorbing cottons are made of polyester fiber, and protective units for protecting the sound-absorbing cottons are provided in the multiple circular holes.

[0010] Preferably, the protective unit includes multiple non-woven fabrics, which are respectively disposed in multiple circular holes. The outer sides of the multiple non-woven fabrics are respectively in close contact with the inner sides of multiple sound-absorbing cottons. Fixing units for fixing the sound-absorbing cottons and non-woven fabrics are provided in the multiple circular holes.

[0011] Preferably, the fixing unit includes multiple perforated meshes, which are respectively fixedly disposed in multiple circular holes.

[0012] Preferably, the circular holes on one of the sound-absorbing plates are staggered with the circular holes on the other sound-absorbing plate.

[0013] Preferably, the upper end of the air outlet pipe is provided with a flange, and a rubber gasket is fixedly provided on the upper surface of the flange.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, the sound-absorbing cotton absorbs noise, and the second sound-absorbing component uses multiple individual sound-absorbing units to break down and reduce noise, resulting in a significant noise reduction effect. The staggered circular holes can guide the airflow and volume, and the circular holes change the direction of airflow and volume transmission, making it more difficult for noise to propagate outward. The double-layer sound-absorbing plate allows the sound-absorbing plate to process noise in multiple stages, resulting in better sound absorption.

[0016] 2. In this utility model, the strong suction will draw small stones and other particles from the outside into the industrial fan. The filter plate will block fixed particles from the outside, preventing particles from impacting the inside of the industrial fan under the action of airflow, thus reducing the noise generated when the industrial fan is working. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the air outlet duct of this utility model;

[0020] Figure 3 This is a schematic diagram of the air inlet structure of this utility model;

[0021] Figure 4 This is a cross-sectional view of the sound-absorbing plate of this utility model.

[0022] The numbers in the diagram are: 1. Fan body; 11. Air outlet duct; 12. Air inlet; 2. Filter plate; 3. Sound-absorbing plate; 31. Round hole; 4. Sound-absorbing cotton; 5. Non-woven fabric; 6. Perforated mesh; 7. Rubber pad. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example: This example provides a noise reduction structure for industrial fans. See [link / reference]. Figure 1-4 Specifically, it includes a fan body 1, an air outlet pipe 11 integrally formed on the fan body 1, an air inlet 12 opened on the fan body 1, a first noise reduction component for noise reduction at the air inlet 12 on one side, and a second noise reduction component for noise reduction at the air outlet 11 at the upper end.

[0026] In this optional embodiment, the first silencing component blocks fixed particles from the outside, preventing particles from impacting the inside of the industrial fan under the action of airflow, thereby reducing the noise generated when the industrial fan is working. The second silencing component uses multiple individual silencing units inside to break down and reduce noise. The second silencing component has a double-layer design, which allows the second silencing component to process noise in multiple stages and to better silencing the noise.

[0027] Optionally, the first silencing component includes a filter plate 2, which is connected to the fan body 1 by screws and completely covers the air inlet 12.

[0028] In this optional embodiment, the industrial fan is generally installed outdoors. When the fan body 1 is working, the high-power suction fan inside will draw air from the outside. The strong suction will draw small stones and other particles from the outside into the industrial fan. The filter plate 2 blocks the fixed particles from the outside, preventing the particles from impacting the inside of the industrial fan under the action of airflow, and reducing the noise generated when the industrial fan is working.

[0029] Optionally, the second noise reduction assembly includes a pair of noise reduction plates 3 and a plurality of round holes 31. The pair of noise reduction plates 3 are fixedly installed inside the air outlet duct 11. The plurality of round holes 31 are respectively opened on the pair of noise reduction plates 3. The plurality of round holes 31 are provided with noise reduction units for reducing noise. The noise reduction units include a plurality of sound-absorbing cotton 4. The plurality of sound-absorbing cotton 4 are respectively installed in the plurality of round holes 31. The sound-absorbing cotton 4 is made of polyester fiber. The plurality of round holes 31 are provided with protective units for protecting the sound-absorbing cotton 4.

[0030] In this optional embodiment, when the fan body 1 is working, the air outlet pipe 11 vibrates, which is converted into a large noise. The sound-absorbing cotton 4 absorbs the noise. The second noise reduction component uses multiple individual noise reduction units to disassemble and reduce the noise, and the noise reduction effect is obvious.

[0031] Optionally, the protective unit includes multiple non-woven fabrics 5, which are respectively disposed in multiple round holes 31. The outer sides of the multiple non-woven fabrics 5 are respectively in close contact with the inner sides of multiple sound-absorbing cottons 4. The multiple round holes 31 are provided with fixing units for fixing the sound-absorbing cottons 4 and the non-woven fabrics 5.

[0032] In this optional embodiment, the nonwoven fabric 5 can achieve precise control of properties such as air permeability, water absorption, barrier properties, and elasticity by adjusting the fiber ratio and production process, which can provide multi-faceted protection for the sound-absorbing cotton 4 and ensure the service life of the sound-absorbing cotton 4.

[0033] Optionally, the fixing unit includes multiple perforated meshes 6, which are respectively fixedly disposed in multiple circular holes 31;

[0034] In this optional embodiment, the sound-absorbing cotton 4 and the non-woven fabric 5 are located inside the perforated mesh 6, which protects them and functions as a sound barrier.

[0035] Optionally, the circular holes 31 on one muffler 3 are staggered with the circular holes 31 on the other muffler 3;

[0036] In this optional embodiment, the staggered circular holes 31 can guide the wind direction and volume. The circular holes 31 change the transmission direction of the wind direction and volume, making it more difficult for noise to propagate outward. The double-layer sound-absorbing plate 3 enables the sound-absorbing plate 3 to perform multi-stage processing of noise and achieve better sound absorption.

[0037] Optionally, a flange is provided at the upper end of the air outlet duct 11, and a rubber gasket 7 is fixedly provided on the upper surface of the flange;

[0038] In this optional embodiment, when the upper end of the air outlet duct 11 is connected to other components, the rubber pad 7 can effectively prevent the air outlet duct 11 from resonating with other components, thereby reducing the vibration of the air outlet duct 11 and further optimizing the noise reduction effect of the device.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A noise reduction structure for an industrial fan, comprising a fan body (1), characterized in that: The fan body (1) is integrally formed with an air outlet pipe (11), and the fan body (1) is provided with an air inlet (12). A first noise reduction component for noise reduction at the air inlet is provided on one side of the air inlet (12), and a second noise reduction component for noise reduction at the air outlet is provided at the upper end of the air outlet pipe (11). The first noise reduction component includes a filter plate (2), which is connected to the fan body (1) by screws and completely covers the air inlet (12). The second noise reduction component includes a pair of noise reduction plates (3) and multiple round holes (31). The pair of noise reduction plates (3) are fixedly installed in the air outlet pipe (11), and the multiple round holes (31) are respectively opened on the pair of noise reduction plates (3). Noise reduction units for noise reduction are provided in the multiple round holes (31).

2. The noise reduction structure for an industrial fan according to claim 1, characterized in that: The noise reduction unit includes multiple sound-absorbing cotton (4), which are respectively arranged in multiple round holes (31). The sound-absorbing cotton (4) is made of polyester fiber, and the multiple round holes (31) are provided with protective units for protecting the sound-absorbing cotton (4).

3. The noise reduction structure for an industrial fan according to claim 2, characterized in that: The protective unit includes multiple non-woven fabrics (5), which are respectively disposed in multiple round holes (31). The outer sides of the multiple non-woven fabrics (5) are respectively in close contact with the inner sides of multiple sound-absorbing cottons (4). The multiple round holes (31) are provided with fixing units for fixing the sound-absorbing cottons (4) and the non-woven fabrics (5).

4. The noise reduction structure for an industrial fan according to claim 3, characterized in that: The fixing unit includes multiple perforated meshes (6), and the multiple perforated meshes (6) are respectively fixedly arranged in multiple round holes (31).

5. The noise reduction structure for an industrial fan according to claim 4, characterized in that: The circular holes (31) on one of the sound-absorbing plates (3) are staggered with the circular holes (31) on the other sound-absorbing plate (3).

6. The noise reduction structure for an industrial fan according to claim 5, characterized in that: The upper end of the air outlet pipe (11) is provided with a flange, and a rubber gasket (7) is fixedly provided on the upper surface of the flange.

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