Extraction method for covering breathing plane domain of worker
An extraction method and technology for workers, which are applied in the field of air supply design of industrial sites, can solve the problems of non-existent protection effect of workers' breathing zone, lack of technical means, and enlarged space range, so as to achieve easy control and implementation, and improve the working environment. , The effect of saving air supply
An extraction method and technology for workers, which are applied in the field of air supply design of industrial sites, can solve the problems of non-existent protection effect of workers' breathing zone, lack of technical means, and enlarged space range, so as to achieve easy control and implementation, and improve the working environment. , The effect of saving air supply
CN112733468AActive Publication Date: 2021-04-30TONGJI UNIV
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[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0043] Such as figure 1Shown is the flow chart of the implementation of the method of the present invention. Preferably, the circular nozzle is selected as the air supply device for the worker's respiratory protection airflow. Then, according to the basic characteristics of the jet, the air supply from the nozzle will intersect the plane where the worker's breathing height is. When the plane is perpendicular to the jet axis, the intersecting section is circular, as shown in Figure 2(a); when the plane is non-orthogonal to the jet axis, the intersecting section is elliptical, as shown in Figure 2(b).
[0044] Such as image 3 As shown, related studies have shown that the movement trajectory of workers in industrial sites has significant statistical characteristics, that is, the probability of workers staying in a certain area can be determined by counti...
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The invention relates to an extraction method for covering a worker breathing plane domain, which comprises the following steps that a movement residence time probability peak value grid of a worker in an operation process is counted, and a basic shape of a design plane domain is determined according to a shape defined by the movement residence time probability peak value grid of the worker, wherein a minimum ellipse envelope method is adopted; an envelope probability peak value grid is used as a boundary condition to determine a design surface domain covering breathing of a worker through a minimum elliptical envelope line method; the method for extracting the breathing zone design plane domain based on the worker residence time probability peak value is obtained by analyzing the shape features of the plane domain when the air supply jet flow body intersects with the breathing zone plane projection at different angles according to the principle that the jet flow boundary envelopes the person breathing plane domain. According to the extraction method, the air supply amount is saved while breathing exposure reduction of workers is achieved, and the station air supply design supplementing method is environmentally friendly, economical and convenient to master and implement for designers.
Description
technical field [0001] The invention belongs to the field of air supply design for workstations in industrial places, and relates to a minimum ellipse envelope method covering the breathing plane domain of workers. Background technique [0002] The local exhaust in many industrial places is limited by the process and cannot form a closed local exhaust hood, or a small amount of overflow from a high-pollution source is still extremely high for breathing. Most of them cannot rely solely on local exhaust to meet the healthy breathing needs of workers. For example, for the rubber product industry, even if the local exhaust air capture rate of the vulcanization process reaches more than 95%, the concentration of xylene dispersed in the working area is still 3mg / m 3 The "Rubber Factory Occupational Safety and Hygiene Design Standard" (GB / T 50643-2018) actually only stipulates that the concentration in the working area should not exceed 1mg / m 3 , The airflow protection effect crea...
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Patent Timeline
30 Apr 2021
Publication
CN112733468A
- IPC
- G06F30/28; G06F111/08; G06F111/10; G06F113/08
- CPC
- G06F30/28; G06F2113/08; G06F2111/10; G06F2111/08
- Inventors
- 曾令杰; 高军