High-airtightness anti-explosion shell for fuel gas detector

Abstract

The invention discloses a high-airtightness anti-explosion shell for a fuel gas detector. The anti-explosion shell comprises a sealing shell (1) made of transparent ceramic, wherein an air exchange hole (101) is formed in the sealing shell (1), a valve (4) is arranged at the air exchange hole (101), a protecting cover (3) is arranged on the inner wall of the sealing shell (1), a spring (5) is arranged between the tail of a motor (2) and the protecting cover (3), and a rubber pad (102) is fixed at one end, close to the exterior of the sealing shell (1), of the exchange hole (101). The high-airtightness anti-explosion shell has the beneficial effects that the rubber pad is arranged at the exterior of the air exchange hole, and when the fuel gas detector needs to be ventilated, the air enters the sealing shell through a ventilating hole, the air exchange hole, a ventilating trough and the protecting cover; when the fuel gas detector needs to be sealed, the valve is abutted with the rubber pad to seal the ventilating hole and the ventilating trough, so that the airtightness is guaranteed.

Description

technical field [0001] The invention belongs to the field of detectors, in particular to an explosion-proof shell of a highly sealed gas detector. Background technique [0002] Gas detectors, combustible gas detectors, are detectors that respond to single or multiple combustible gas concentrations, and are generally divided into catalytic combustible gas detectors and semiconductor combustible gas detectors. [0003] The catalytic combustible gas detector uses the resistance change of the refractory metal platinum wire to measure the concentration of the combustible gas. When the combustible gas enters the detector, it will cause an oxidation reaction (flameless combustion) on the surface of the platinum wire, and the heat generated will make it The temperature of the platinum wire rises, and the resistivity of the platinum wire changes; the semiconductor combustible gas detector uses a gas-sensitive semiconductor element with high sensitivity. Corresponding relationship wi...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the current technology, to provide a high-seal gas detector explosion-proof casing, to solve the problem that the sealing performance of the threaded plug is not very good in the existing ceramic gas detectors, and after using for a long time , the sealing performance will also decrease, resulting in a decrease in the safety performance of the device and affecting the use of the device

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