Direct-reading dust concentration detector

Abstract

The invention discloses a direct-reading dust concentration detector, and belongs to the technical field of environment-friendly safety facilities. The direct-reading dust concentration detector comprises an air extracting device and a sampling head, and is characterized in that: the detector also comprises a signal transmitting device, a signal receiving device, a dust intercepting device, a signal processing device carrying a display screen and a box body; the sampling head is fixed with the box body, extends out of the box body, and is connected with the signal receiving device through a gas path; the air extracting device, the signal transmitting device, the signal receiving device and the signal processing device are arranged in the box body; the signal receiving device is matched with the signal transmitting device and is positioned on the upper part of the signal transmitting device; the dust intercepting device is arranged between the signal transmitting device and the signal receiving device; the signal transmitting device and the signal receiving device are all eclectically connected with the signal processing device through circuits; and the signal transmitting device is connected with the air extracting device through a gas path. The direct-reading dust concentration detector has the advantages of not influencing detection effect due to vibration, really reflectingthe dust concentration in working environment in real time, and displaying the dust concentration on the display screen.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and safety facilities, and in particular relates to a direct-reading dust concentration detector, which is used for detecting the dust concentration in the air in industrial and mining enterprise workplaces so as to know the quality of the air. Background technique [0002] For those industries that are prone to dust in the production process, such as coal mines, cement production industries, textile industries, food processing industries (flour processing enterprises), pharmaceutical and chemical industries, etc., it is usually necessary to monitor the air at the job site with dust monitoring devices , in order to take corresponding disposal measures, on the one hand to protect the health of workers, on the other hand to prevent accidents. In the past, the explosions of flour mills, hemp and cotton textile mills and some coal mines reported by the media were all caused by the dus...

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Problems solved by technology

[0004] One of the deficiencies of the aforementioned device for monitoring dust concentration is that it is difficult to objectively and truly reflect the dust concentration or content in the monitored environment, because the device is portable and is worn by the operator. Among them, with the movement of the limbs, the device is constantly affected by the vibration, so that the dust that has entered the sampling head falls off and is lost, which affects the sampling effect; secondly, because the result of the dust concentration is obtained by weighing, therefore, On the one hand, it cannot be known online (or called instant learning, also known as direct reading), but only when the operator leaves the job site, the results will be obtained by a special department through weighing and comparison. On the other hand, the weighing error is relatively large; , is misleading, because, as is well known in the industry, filter paper is more sensitive to the environment, and its own weight will change due to changes in climate and humidity. In wet weather, because of its serious moisture absorption, the obtained The result is not the real result; Fourth, because the dust concentration cannot be known instantly or dynamically at the job site, the device with this structure is not suitable for professional monitoring units such as the CDC, environmental protection department and labor inspection department etc. check using

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