Dust concentration detecting and sensing device

Abstract

The invention discloses a dust concentration detecting and sensing device which aims at solving the problems of potential safety hazards and low detection accuracy generated when a suction fan is adopted to suck dust gas into a detection bin. The dust concentration detecting and sensing device comprises a light projector, a photoelectric detecting converter and a detection bin, wherein the detection bin comprises an airflow passage which is through up and down and is arranged in the middle of a bin body; a light projector passage and a photoelectric detecting converter passage which extend inwards and intersect in the airflow passage are arranged on the two sides of the outlet of the airflow passage; the light projector passage is provided with one segment extending forwards to the surface of the bin body; an airflow passage extension tube with an upward opening is mounted at the outlet of the airflow passage, and a PTC ceramic thermistor heater is mounted outside the airflow passage extension tube; the photoelectric detecting converter is mounted at the inlet of the photoelectric detecting converter passage, and the light projector is mounted at the inlet of the light projector passage; a communicating tube with a downward opening is mounted at the outlet of the light projector passage, and a gas collection constant-current cover with a downward opening is mounted at the inlet of the airflow passage.

Description

technical field [0001] The invention belongs to the technical field of dust concentration detection, and in particular relates to a dust concentration detection sensor device suitable for dust hazard operation sites. Background technique [0002] In industrial production processes such as mining, metal processing, grain crushing, and fiber processing, it is inevitable to produce rock dust such as free silica or explosives such as magnesium dust, aluminum dust, coal dust, flour dust, and short fibers. Dust, these dust particles suspended in the air, not only can cause respiratory dust disease, seriously endanger the health of workers, but also when the explosive dust reaches a certain concentration in the air, when there is an open flame or reaches a certain temperature, It is very easy to burn and explode, causing serious safety production accidents, so the detection and prevention of dust is very necessary. The dust concentration detection sensor device is suitable for the...

AI Technical Summary

Problems solved by technology

Even so, the mechanical friction during the operation of the suction fan may still produce high temperature or sparks, as well as objective noise

The suction fan is a fragile device, and the price and maintenance cost are high

Use a suction fan to forcibly inhale the dust-containing gas into the detection chamber. Due to the influence of the performance of the suction fan, the dust content in the detection chamber may not be exactly the same as the dust content in the actual environment, which will affect the accuracy of dust detection.

Images