Detection device for dust concentration detector

Abstract

The invention discloses a detection device for a dust concentration detector. The detection device comprises a lower base plate, a chamber body and an upper cover plate, wherein one detection chamber is arranged on the cavity body, a dust diversion sleeve is arranged at an upper opening, a light transmitting channel and a light receiving channel are formed in the chamber body, a light source and a light inlet convex lens are arranged on the light transmitting channel, a light outlet convex lens and a receiver are arranged on the light receiving channel, a first injection channel and a second injection channel are formed in the cavity body, the first injection channel and the second injection channel are respectively aligned to the surface of one side of each of the light inlet convex lens and the light outlet convex lens, a first pipe joint and a second pipe joint are arranged on the upper cover plate, and the first pipe joint and the second pipe joint are respectively communicated with the first injection channel and the second injection channel. The detection device can effectively protect the light inlet convex lens and the light outlet convex lens, dust is avoided being attached on the surfaces of the light inlet convex lens and the light outlet convex lens, and detection accuracy is also improved.

Description

technical field [0001] The invention relates to a detection device, in particular to a detection device of a dust concentration detector. Background technique [0002] The dust concentration detection system is used to measure the concentration of dust or particulate matter in open spaces. It can be widely used in various industries for online real-time dust concentration monitoring of factories, working environments, work spaces, offices, outdoor spaces, etc., as well as special monitoring of mines and coal mines. Dust concentration monitoring in industrial working environments. However, the concentration of particulate matter in urban rail transit sites also needs to be detected online. Due to the large flow of people in urban rail transit sites, ground dust will be raised, and subway operations will also produce some metal particles. Excessive concentration of these particles will cause harm to the human body . The main principle of the current dust concentration detect...

AI Technical Summary

Problems solved by technology

However, the detection device of the dust concentration detector based on the light scattering principle currently used has the following disadvantages: 1. The spherical reflector inside the dust concentration detector used for a long time is easy to attach dust particles after a long period of use, thereby affecting The reflection effect of the spherical reflector affects the accuracy of the detection results; 2. The flow route of the dusty gas in the detection device of the current instrument is unreasonable, and the circulation channel of the dusty gas is long and curved, which makes it easy for dust to Attached to the channel, resulting in inaccurate dust detection results; 3. The current detection device is based on the principle of light scattering, and the light generated by the light source enters the detection chamber and is received by the receiver after being scattered by the dust. The structure of the chamber is simple, just a cylindrical chamber, and the laser light source emits laser light from the left side

Part of the laser passes through the dust and enters the detection range of the photodetector upwards, and the other part is refracted downward and then reflected by the spherical reflector and then collected into the detection range of the photoelectric detector. However, the reflected light of the spherical reflector must penetrate the dust flow Only after the area can be monitored, the reflected light will be blocked by the dust, which will cause inaccurate monitoring results

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