Automatic concentration control sulfur dioxide test box

Abstract

The invention relates to an automatic concentration control sulfur dioxide test box. The test box comprises a box body (1), the front end surface of the box body (1) is provided with a box door (2), a work chamber (4) is arranged in the box body (1), a sample rack (5) is installed on the inner wall of the work chamber (4), the test box also comprises an inflation system, a concentration detection system and a heating system, the inflation system is connected to an inflation port (6) of the work chamber (4) by a gas-guide tube, the concentration detection system is connected to a detection port (7) and a gas return port (8) by gas-guide tubes and are between the detection port (7) and the gas return port (8), the rear end of the work chamber (4) is provided with stirring blades (9), the stirring blades (9) are connected to an output end of a stirring motor (10), and the inflation system, the concentration detection system, the heating system and the stirring motor (10) are respectively connected to an electrical system by lines. The automatic concentration control sulfur dioxide test box can display and control a sulfur dioxide concentration in the box in real time, ensures uniformity of sulfur dioxide in air in the box, produces real and reliable test results and has a high automation degree.

Description

[technical field] [0001] The invention relates to the technical field of environmental test instruments, in particular to an automatic concentration control sulfur dioxide test chamber. [Background technique] [0002] Due to the activity of its molecules, sulfur dioxide gas can react with water to generate dilute sulfuric acid, which is highly corrosive to electrical products and various industrial products. Therefore, it is possible to conduct sulfur dioxide tests on some specific industrial products and conduct sulfur dioxide accelerated corrosion tests. Find the problem of the product early, so as to improve and seek newer materials. It can meet the sulfur dioxide corrosion and meet the above requirements of the standard, so it is also a very effective means to use the test chamber to carry out the sulfur dioxide test. At present, the mainstream salt spray chambers on the market mainly have the following deficiencies during use: [0003] (1) Due to the difficulty of gas...

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Problems solved by technology

[0005] (3) Since the gas is filled into the test chamber at one time, when the test chamber runs for a period of time, the sulfur dioxide gas reacts with water, resulting in a certain cleaning consumption, but the user cannot understand it in real time, nor can it be more realistic reflect the test requirements;

[0006] (4) Since the gas is filled manually, the automation procedure is not high. At the same time, because the amount of filling at one time is relatively large, it is only suitable for occasions with high concentrations. If you want to test the concentration of PPM level, it is basically impossible to achieve;

[0007] (5) Conventional sulfur dioxide sinks and diffuses due to the weight of the gas when it is filled with gas, so there may be uneven gas distribution

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