Study on the explosion characteristics of methane/air premixed gas under the inhibition of sliding airtight device

Many methane explosion cases show that the explosion can make serious consequences. So, a new type of sliding airtight device was established to study the explosion characteristics of methane. From the perspective of overpressure, the sliding airtight device may increase the mechanical damage of explosion to a certain extent. From the perspective of flame, the flame can be extinguished quickly in a very short distance and a very short time. The sliding airtight device can suppress the flame well, and control the explosion within a limited range without secondary fire and explosion. The sliding device has the best effect on suppressing the explosion flame of 9.5% gas within 116 ms, the second is 11.5% gas within 126 ms, and the last is 7.5% gas within 136 ms. The flame extinction time in all cases is obviously lower than that in the case of no device. It has a good effect on isolation and suppression for methane explosions.