A circulating air separation structure with built-in noise elimination

Abstract

The utility model discloses a built -in sound attenuation's circulating air selection structure, including sound attenuation chamber, self circulating fan, air duct, settling chamber, air selection area, air selection adjusting device and return air duct, the self circulating fan is through air duct and return air duct with sound attenuation chamber, the settling chamber and air selection area intercommunication, forms circulating air path, sound attenuation chamber sets up on the airflow path of circulating air path, is used to reduce equipment operation noise, air selection area is used for separating material and impurity, the settling chamber is used for the settlement treatment of impurity in circulating airflow, the self circulating fan drive airflow circulates between sound attenuation chamber, air duct, air selection area, return air duct and settling chamber, to simplify air path installation and realize air selection function, the utility model solves the current air selection equipment air path installation complex, noise control is insufficient, and the technical problem that air selection adaptability is weak, realized the integration function of simplifying installation, high -efficient noise reduction, accurate air selection.

Description

Technical Field

[0001] This utility model relates to the field of air separation equipment technology, specifically to a circulating air separation structure with built-in noise reduction. Background Technology

[0002] In the field of material sorting (such as removing light impurities from grains, spices, and oilseeds), air classifiers are key devices for separating materials from impurities. Traditional air classifiers have the following shortcomings:

[0003] 1. Complex air duct installation: It often uses external air ducts and external silencers, which makes the pipe connections complicated, occupies a lot of space, and involves many installation procedures and high costs.

[0004] 2. Severe noise pollution: The noise generated by the operation of the fan and airflow disturbance lacks effective built-in suppression, and external silencers take up space and have limited noise reduction effect;

[0005] 3. Poor adaptability of air separation: The negative pressure adjustment of the air intake is not flexible enough, making it difficult to adapt to the separation requirements of materials with different specific gravities.

[0006] Therefore, there is an urgent need for an integrated air separation structure that can simplify air path installation, efficiently reduce noise, and provide excellent air separation performance. Summary of the Invention

[0007] This utility model aims to solve the technical problems of complex air path installation, insufficient noise control, and weak adaptability of existing air separation equipment, and provides a circulating air separation structure with built-in noise reduction, which realizes the integrated functions of simplified installation, efficient noise reduction, and accurate air separation.

[0008] The technical solution adopted in this utility model is as follows: a circulating air separation structure with built-in noise reduction, characterized in that it includes a noise reduction chamber, a self-circulating fan, an air duct, a settling chamber, an air separation area, an air separation adjustment device, and a return air duct; the self-circulating fan is connected to the noise reduction chamber, the settling chamber, and the air separation area through the air duct and the return air duct to form a circulating air path; the noise reduction chamber is set on the airflow path of the circulating air path to reduce equipment operating noise; the air separation area is used to separate materials from impurities; the settling chamber is used to settle impurities in the circulating airflow; the self-circulating fan drives the airflow to circulate between the noise reduction chamber, the air duct, the air separation area, the return air duct, and the settling chamber to simplify the air path installation and realize the air separation function.

[0009] Furthermore, the anechoic chamber is a closed cavity structure with sound-absorbing materials or structures inside to further improve the noise reduction effect.

[0010] Furthermore, the noise reduction structure is a loop-shaped air duct.

[0011] Furthermore, the front section of the air separation area is equipped with a return air regulating device to regulate the air volume in the air duct.

[0012] Furthermore, an air separation adjustment device is installed in the return air duct to help separate materials and impurities in the air separation area.

[0013] Furthermore, the air duct is a one-piece molded structure, which makes the air path continuous and without additional external piping, further simplifying the installation.

[0014] The beneficial effects of this utility model are:

[0015] 1. Simplified air duct installation: The integrated air duct and built-in circulation structure eliminate the need for external piping, significantly reducing installation steps and lowering installation costs and difficulty;

[0016] 2. Highly efficient noise reduction: The anechoic chamber is located in the circulating air path, which directly suppresses airflow noise at the source, significantly reducing equipment operating noise and improving environmental friendliness;

[0017] 3. Precisely adaptable to air separation: The air separation adjustment device can flexibly adjust the negative pressure according to the material characteristics (such as density and particle size). Combined with the impurity treatment in the settling chamber, it can achieve precise separation of materials and impurities, and is suitable for various sorting scenarios (such as grain, plastic, light industrial materials, etc.). Attached Figure Description

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

[0019] In the diagram: 1-Silence chamber, 2-Self-circulating fan, 3-Air duct, 4-Settling chamber, 5-Air separation area, 6-Impurities, 7-Materials, 8-Return air regulating device, 9-Air separation regulating device, 10-Return air duct. Detailed Implementation

[0020] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort. To facilitate understanding of this utility model, a more detailed description of this utility model will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1As shown, this utility model is a built-in noise-absorbing circulating air classifier structure, a key component of symmetrical screening and impurity removal equipment. Through integrated design, it achieves synergy between air classification, noise reduction, and circulation functions. This utility model uses a self-circulating fan 2 as its core power source, connecting the noise-absorbing chamber 1, settling chamber 4, and air classification area 5 via an integrated air duct 3 and return air duct 10, forming a complete closed-loop circulating air path. The air duct 3 is rectangular, surrounding the outside of the equipment, without external piping. This not only eliminates the cumbersome installation procedures of aligning and sealing traditional equipment pipes, saving significant space, reducing installation time and labor costs, but also reduces airflow loss and turbulence noise at pipe connections.

[0022] During operation, the self-circulating fan 2 drives the airflow into the anechoic chamber 1. The anechoic chamber 1 is a closed cavity structure, enclosed by metal or composite sound-absorbing materials, which can effectively block noise radiation outward. Its interior is not only lined with sound-absorbing materials such as centrifugal glass wool and flame-retardant polyester fiber cotton, but also equipped with a loop-shaped air duct composed of guide plates. The sound-absorbing materials absorb mid-to-high frequency noise through their porous structure, while the loop-shaped air duct consumes energy by extending the airflow residence time, increasing the contact area with the sound-absorbing materials, and utilizing the turbulence formed by the airflow turning. It is particularly effective in reducing mid-to-low frequency noise. The combination of the two reduces the operating noise of the equipment by 15-25 dB, greatly improving the working environment.

[0023] The silenced airflow enters the air separation zone 5 through the air duct 3. The return air regulating device 8 in the front return air duct of this zone adjusts the airflow through valve opening or is controlled by the fan frequency converter, flexibly adapting to the sorting needs of different materials 7: when processing grain and straw impurities, a higher negative pressure can be adjusted to ensure straw is sucked in while grain falls; when processing plastic granules and lightweight debris, a lower negative pressure can be adjusted to accurately separate fine impurities. A vertical return air duct 10 is provided between the air separation zone 5 and the settling chamber 4. The air separation regulating device 9 installed in the return air duct 10 can cooperate with the air separation zone 5 to separate materials 7 and impurities 6. The impurities 6 carried by the airflow then enter the settling chamber 4. The settling chamber 4 reduces the airflow velocity by expanding its cavity volume, allowing the impurity particles to settle naturally due to gravity, preventing them from entering the fan and causing wear or blockage, thus ensuring long-term stable operation of the equipment.

[0024] Finally, the purified airflow returns to the self-circulating fan 2, completing one cycle.

[0025] This invention eliminates the complex installation of external pipelines, controls noise pollution through source silencing, and achieves precise sorting of various materials through flexible negative pressure adjustment and efficient settling. It effectively solves the pain points of traditional air separation equipment, such as cumbersome installation, noise pollution, and weak adaptability, and has outstanding practical value in fields such as grain processing and plastic sorting.

[0026] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circulating air separator structure with built-in noise reduction, characterized in that, It includes an anechoic chamber (1), a self-circulating fan (2), an air duct (3), a settling chamber (4), an air separation area (5), an air separation adjustment device (9), and a return air duct (10); the self-circulating fan (2) is connected to the anechoic chamber (1), the settling chamber (4), and the air separation area (5) through the air duct (3) and the return air duct (10) to form a circulating air path; the anechoic chamber (1) is set on the airflow path of the circulating air path to reduce the operating noise of the equipment; the air separation area (5) is used to separate materials (7) from impurities (6); the settling chamber (4) is used to settle impurities (6) in the circulating airflow; the self-circulating fan (2) drives the airflow to circulate between the anechoic chamber (1), the air duct (3), the air separation area (5), the return air duct (10), and the settling chamber (4) to simplify the air path installation and realize the air separation function.

2. The circulating air separator structure with built-in noise reduction according to claim 1, characterized in that, The anechoic chamber (1) is a closed cavity structure with sound-absorbing materials or structures inside to further improve the noise reduction effect.

3. The circulating air separator structure with built-in noise reduction according to claim 2, characterized in that, The noise reduction structure is a loop-shaped air duct.

4. The circulating air separator structure with built-in noise reduction according to claim 1, characterized in that, The front section of the air selection area (5) is equipped with a return air regulating device (8) for regulating the air volume in the air duct.

5. The circulating air separator structure with built-in noise reduction according to claim 1, characterized in that, The return air duct (10) is equipped with an air separation adjustment device (9) to separate materials (7) and impurities (6) in the air separation area (5).

6. The circulating air separator structure with built-in noise reduction according to claim 1, characterized in that, The air duct (3) is an integrally formed structure, which makes the air path continuous and without additional external pipes, further simplifying the installation.

Images