The invention relates to an automatic explosion suppressing device applicable to
dust explosion in a pipeline. The automatic explosion suppressing device comprises
flame sensors, pressure sensors, a high-pressure explosion suppression agent container and a small-sized
detonation device, wherein a
carbonate powder explosion suppression agent is placed in the small-sized
detonation device, the high-pressure explosion suppression agent container is filled with a high-pressure N2
gas explosion suppression agent, a
rupture disc is arranged between the high-pressure explosion suppression agent container and the small-sized
detonation device and is used for separating high-pressure N2 gas of the high-pressure explosion suppression agent container, a
rupture disc diaphragm is arranged between the small-sized detonation device and a
powder conveying pipeline and is used for supporting the
carbonate powder explosion suppression agent, the
flame sensors and the pressure sensors are connected with a controller, and the controller is connected with the small-sized detonation device and is used for controlling to trigger the small-sized detonation device, so that the high-pressure N2
gas explosion suppression agent in the high-pressure explosion suppression agent container and the
carbonate powder explosion suppression agent enter the pipeline at high speed, and thus, explosion suppression is realized. According to the automatic explosion suppressing device applicable to the
dust explosion in the pipeline, quick response to an explosion accident in the pipeline can be carried out, so that the occurrence of the explosion accident or the further expansion of harm is avoided.