A noise reduction device for a blower

Abstract

This invention relates to the field of blower noise reduction technology, and proposes a noise reduction device for a blower, including a pipeline with a cavity. The pipeline has an air inlet and several exhaust ports, and the cross-sectional area of ​​the exhaust ports is larger than that of the air inlet. The exhaust ports are used to connect to the blower's air outlet. This technical solution solves the problem in existing technologies where blower air outlets are simply protected, or even not protected at all, resulting in high noise levels inside the blower, affecting worker health, and reducing the blower's service life.

Description

Technical Field

[0001] This invention relates to the field of fan noise reduction technology, specifically to a noise reduction device for a blower. Background Technology

[0002] A blower is a machine that uses input mechanical energy to increase gas pressure and discharge gas. It is a type of driven fluid machinery, commonly known as a blower. Currently, blowers are used in a wider range of applications, such as factories, mines, and tunnels. Large blowers are the most commonly used. The exhaust or intake end of a large blower is usually only connected to a filter for simple protection, or even not connected at all. This results in loud noise inside the blower, especially when the air volume is large, the sound can be very harsh. Over time, this can affect the health of workers and reduce the service life of the blower. Summary of the Invention

[0003] This invention proposes a noise reduction device for blowers, which solves the problem in related technologies where blower vents are simply protected, or even not protected at all, resulting in loud noise inside the blower, affecting workers' health, and reducing the service life of the blower.

[0004] The technical solution of the present invention is as follows:

[0005] A noise reduction device for a blower, comprising:

[0006] The pipeline has a cavity, which has an air inlet and several exhaust ports. The cross-sectional area of ​​the exhaust ports is larger than that of the air inlet, and the exhaust ports are used to connect to the blower outlet.

[0007] As a further technical solution, several of the exhaust ports are arranged and distributed along the axial direction of the pipeline.

[0008] As a further technical solution, it also includes:

[0009] The soundproof box contains the piping, which is fixedly connected to the inner wall of the soundproof box. The air inlet and the exhaust outlet are both located on the soundproof box.

[0010] As a further technical solution, it also includes:

[0011] A filter element assembly disposed within the exhaust port for filtering gas and slowing down gas flow rate.

[0012] As a further technical solution, the filter element assembly includes:

[0013] The noise-absorbing filter cotton is disposed inside the exhaust port.

[0014] As a further technical solution, the sound-absorbing filter cotton comprises several units, and the sound-absorbing filter cotton is annular. The filter element assembly further includes:

[0015] A limiting plate is fixedly disposed inside the exhaust port. The cross-sectional area of ​​the limiting plate is smaller than that of the exhaust port. An annular opening is formed between the limiting plate and the inner wall of the exhaust port. The annular opening communicates with the exhaust port. A plurality of sound-absorbing filter cottons are sequentially sleeved on the limiting plate. The gas is used to pass through the sound-absorbing filter cottons sequentially and is discharged from the annular opening.

[0016] As a further technical solution, the filter element assembly also includes:

[0017] A filter chamber is detachably installed inside the exhaust port, and a limiting plate is fixedly installed on the filter chamber.

[0018] As a further technical solution, the filter element assembly also includes:

[0019] A ring pipe is disposed on the ring opening, the cross-sectional area of ​​the ring pipe is smaller than the cross-sectional area of ​​the exhaust port, the outer wall of the ring pipe and the inner wall of the exhaust port form a silencing area, and the ring pipe has the silencing area inside;

[0020] A sound-absorbing fiber component is disposed within the sound-absorbing area and located within the exhaust port.

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] The working principle of this invention is as follows: By installing a pipe at the blower's air outlet, when the gas flows through the pipe, it first enters the pipe cavity from the air inlet, and then is evenly distributed into the blower from several exhaust ports with increased cross-sectional areas. By increasing the pipe diameter to reduce the flow velocity and distributing the exhaust ports to various positions of the air outlet, the airflow is made more uniform, thereby reducing noise. It can also adapt well to the scenario when the air volume is large, spreading the airflow evenly. The blower's air outlet can be either an air inlet or an air outlet, but most of the noise of traditional blowers comes from the air inlet, which is only equipped with some filters. Therefore, in order to greatly reduce noise and provide a certain degree of protection for the blower, the pipe can be installed at the blower's air inlet. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of a silencing device for a blower according to the present invention;

[0025] Figure 2This is a schematic diagram of the internal structure of a silencing device for a blower according to the present invention;

[0026] Figure 3 This is a schematic diagram of the pipeline structure in this invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the exhaust port in this invention;

[0028] Figure 5 This is a schematic diagram of the internal structure of the filter element assembly in this invention;

[0029] In the diagram: 1. Pipeline, 2. Pipe cavity, 3. Air inlet, 4. Exhaust outlet, 5. Soundproof box, 6. Filter element assembly, 7. Noise-absorbing filter cotton, 8. Limiting plate, 9. Ring opening, 10. Filter chamber, 11. Ring pipe, 12. Noise-absorbing area, 13. Noise-absorbing fiber component. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1-5 As shown, this embodiment proposes a silencing device for a blower, comprising:

[0032] Pipeline 1 has a cavity 2, the cavity 2 has an air inlet 3 and several exhaust ports 4, the cross-sectional area of ​​the exhaust ports 4 is larger than the cross-sectional area of ​​the air inlet 3, and the exhaust ports 4 are used to connect to the blower air outlet.

[0033] Several exhaust ports 4 are arranged along the axial direction of the pipeline 1.

[0034] In this embodiment, the working principle of this solution is as follows: By installing pipe 1 at the blower outlet, when the gas flows through pipe 1, it first enters the pipe cavity 2 from the air inlet 3, and then is evenly distributed into the blower from several exhaust ports 4 with increased cross-sectional areas. By increasing the pipe diameter to reduce the flow velocity and distributing the exhaust ports 4 to various positions of the outlet, the airflow is made more uniform, thereby reducing noise. It can also adapt well to the scenario when the air volume is large, and the airflow is evenly distributed. The blower outlet can be either an air inlet or an air outlet, but most of the noise of traditional blowers comes from the air inlet, which is only equipped with some filters. Therefore, in order to greatly reduce noise and provide a certain degree of protection for the blower, pipe 1 can be installed at the air inlet of the blower.

[0035] Furthermore, it also includes:

[0036] The soundproof box 5 has the pipeline 1 installed inside it and fixedly connected to the inner wall of the soundproof box 5. The air inlet 3 and the exhaust outlet 4 are both installed on the soundproof box 5.

[0037] In this embodiment, several exhaust ports 4 are arranged along the axial direction of the pipe 1, mainly to save costs. If several exhaust ports 4 are arranged along the circumference of the air outlet, the diameter of the pipe 1 needs to be increased, thereby increasing costs. At the same time, the two arrangement methods have basically the same effect on noise reduction, so several exhaust ports 4 are arranged along the axial direction of the pipe 1.

[0038] Furthermore, it also includes:

[0039] A filter element assembly 6 is disposed within the exhaust port 4 and is used to filter gas and slow down the gas flow rate.

[0040] In this embodiment, the entire pipe 1 is enclosed in the soundproof box 5. On the one hand, this provides stable support for the pipe 1, the air inlet 3 and the exhaust outlet 4, making it convenient for workers to perform installation and welding operations. On the other hand, sound insulation cotton can be added inside the soundproof box 5 to improve the overall noise reduction function.

[0041] Furthermore, the filter element assembly 6 includes:

[0042] The noise-absorbing filter cotton 7 is disposed inside the exhaust port 4.

[0043] Furthermore, the sound-absorbing filter cotton 7 comprises several units, and the sound-absorbing filter cotton 7 is annular. The filter element assembly 6 further includes:

[0044] A limiting plate 8 is fixedly disposed inside the exhaust port 4. The cross-sectional area of ​​the limiting plate 8 is smaller than that of the exhaust port 4. An annular opening 9 is formed between the limiting plate 8 and the inner wall of the exhaust port 4. The annular opening 9 communicates with the exhaust port 4. A plurality of sound-absorbing filter cottons 7 are sequentially sleeved on the limiting plate 8. The gas is used to pass through the sound-absorbing filter cottons 7 sequentially and is discharged from the annular opening 9.

[0045] Furthermore, the filter element assembly 6 also includes:

[0046] The filter chamber 10 is detachably disposed within the exhaust port 4, and the limiting plate 8 is fixedly disposed on the filter chamber 10.

[0047] In this embodiment, a filter element assembly 6 is installed inside the exhaust port 4 to provide filtration and slow down the airflow, thereby further improving the noise reduction function. The overall noise reduction function is achieved by the sound-absorbing filter cotton 7 of the filter element assembly 6. Several sound-absorbing filter cottons 7 are arranged in a ring and sequentially wrapped on the limiting plate 8. This is to ensure that the airflow flowing through the exhaust port 4 first flows into several ring-shaped sound-absorbing filter cottons 7, and after being blocked by the limiting plate 8, it passes through all the sound-absorbing filter cottons 7 in sequence, which plays a role in slowing down and filtering, and finally discharges from the ring port 9 into the blower.

[0048] After long-term use, in order to facilitate the replacement of the filter cotton, the limiting plate 8 is designed to be detachably installed in the exhaust port 4 through the filter chamber 10. When replacing, stop using, open the exhaust port 4 chamber door, and remove the filter chamber 10 for replacement. The removal method can be fasteners or magnetic attraction, etc., to achieve quick removal.

[0049] Furthermore, the filter element assembly 6 also includes:

[0050] A ring pipe 11 is disposed on the ring opening 9. The cross-sectional area of ​​the ring pipe 11 is smaller than the cross-sectional area of ​​the exhaust port 4. The outer wall of the ring pipe 11 and the inner wall of the exhaust port 4 form a silencing region 12. The ring pipe 11 has the silencing region 12 inside.

[0051] The sound-absorbing fiber component 13 is disposed within the sound-absorbing area 12 and located within the exhaust port 4.

[0052] In this embodiment, in order to further improve the noise reduction effect, an annular pipe 11 is provided on the annular port 9. The airflow ejected from the annular port 9 flows directly into the blower along the annular pipe 11. Due to the noise reduction fiber component 13 provided in the noise reduction area 12, which can be glass fiber or the like, vortices are formed in the noise reduction fiber component 13 during the flow of the airflow along the annular pipe 11, thereby achieving the purpose of improving the noise reduction effect.

[0053] The above are merely 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 within the protection scope of the present invention.

Claims

1. A silencing device for a blower, characterized in that, include: Pipeline (1), the pipeline (1) has a cavity (2), the cavity (2) has an air inlet (3) and several exhaust ports (4), the cross-sectional area of ​​the exhaust ports (4) is larger than the cross-sectional area of ​​the air inlet (3), and the exhaust ports (4) are used to connect to the blower air outlet; Also includes: A filter element assembly (6) is disposed within the exhaust port (4) for filtering gas and slowing down the gas flow rate; The filter element assembly (6) includes: Silencing filter cotton (7), wherein the silencing filter cotton (7) is disposed inside the exhaust port (4); The sound-absorbing filter cotton (7) comprises several units, and the sound-absorbing filter cotton (7) is annular. The filter element assembly (6) further includes: A limiting plate (8) is fixedly installed inside the exhaust port (4). The cross-sectional area of ​​the limiting plate (8) is smaller than that of the exhaust port (4). An annular opening (9) is formed between the limiting plate (8) and the inner wall of the exhaust port (4). The annular opening (9) is connected to the exhaust port (4). Several sound-absorbing filter cottons (7) are sequentially sleeved on the limiting plate (8). The gas is used to pass through the sound-absorbing filter cottons (7) sequentially and is discharged from the annular opening (9).

2. The silencing device for a blower according to claim 1, characterized in that, Several of the exhaust ports (4) are arranged axially along the pipeline (1).

3. The silencing device for a blower according to claim 1, characterized in that, Also includes: The soundproof box (5) has the pipeline (1) installed inside the soundproof box (5) and fixedly connected to the inner wall of the soundproof box (5). The air inlet (3) and the exhaust outlet (4) are both installed on the soundproof box (5).

4. The silencing device for a blower according to claim 1, characterized in that, The filter assembly (6) also includes: The filter chamber (10) is detachably disposed inside the exhaust port (4), and the limiting plate (8) is fixedly disposed on the filter chamber (10).

5. The silencing device for a blower according to claim 1, characterized in that, The filter assembly (6) also includes: A ring pipe (11) is disposed on the ring opening (9). The cross-sectional area of ​​the ring pipe (11) is smaller than the cross-sectional area of ​​the exhaust port (4). The outer wall of the ring pipe (11) and the inner wall of the exhaust port (4) form a silencing area (12). The ring pipe (11) has the silencing area (12) inside. The sound-absorbing fiber component (13) is disposed within the sound-absorbing area (12) and located within the exhaust port (4).

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