Dry Bacteria Penetration Tester

Abstract

The invention relates to a tester for preventing dry bacteria from penetrating, wherein the tester can effectively solve the problem of the table surface of a testing vibration table for preventing the dry bacteria from penetrating that the vibration frequency is unstable, the time control is inaccurate and the experiment results of different test boxes are not coincident. According to the technical scheme, the air outlet of an air source is connected to the air inlet of an air storage tank, the air outlet of the air storage tank is connected to the air inlet of a three-way valve through a stop valve and a pressure adjusting valve which are connected in series, the air outlet of the three-way valve is respectively connected to a pressure gauge and a flow regulator, the air outlet of the flow regulator is connected to the air inlet of a two-position three-way electromagnetic valve via a flow meter, the air outlet of the two-position three-way electromagnetic valve is respectively connected to a ball valve and a vibration source arranged on the vibration table, the vibration table comprises a rubber bearing and a vibration table surface arranged on the rubber bearing, the test boxes are circularly and uniformly distributed on the vibration table surface around the vibration source, and the output end of a time relay is connected to the control end of the two-position three-way electromagnetic valve. The tester is stable in gas pressure and flow, accurate in experiment results, convenient to use and good in effect.

Description

technical field [0001] The invention relates to measurement equipment in the fields of measurement, measurement and inspection, especially a dry-blocking state developed for the test of whether the key parts of medical protective clothing have dry state microorganisms such as SARS virus H7N9 poultry virus that block dander and dust. Bacterial penetration tester. Background technique [0002] At present, there is no product information about a similar dry-state bacterial penetration tester released in China. There are disadvantages in the dry-state bacterial penetration test method: 1. Due to the unstable pressure and instantaneous flow rate of the excitation gas source of the pneumatic vibration source, the vibration frequency of the vibration table used is unstable. The root cause of this problem lies in the current domestic and foreign Flow regulating valves (including needle valves) directly cannot achieve stable flow adjustment for large flow gases. The root cause 2 is...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a dry state bacteria penetration tester, which can effectively solve the vibration frequency instability and time control of the dry state bacteria penetration test vibrating table. The problem of inaccuracy and inconsistent experimental results of each test box

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