Many industrial enterprises or research departments in the petroleum, chemical, coal, scientific research, military and other countries often leak and spill a variety of inflammables and explosives during the various processes of experimentation, production, processing, transportation and storage. Gas, liquid and various powders and fibers. After these substances are mixed with air, they will become a mixture that is prone to explosion hazards, and the surrounding places have become explosion hazard places of different degrees. In this dangerous working environment In China, you need to use safer products. Explosion-proof cameras are such products. At present, the most common explosion-proof surveillance camera on the market is an "explosion-proof" type, which encloses all the parts of the camera that may ignite explosive gas mixtures in a shell, and its shell can withstand any joint surface or structural gap of the shell. The flammable mixture that penetrates into the shell will explode inside without being damaged, and will not cause the ignition of an explosive environment formed by one or more gases outside. Put the camera parts that may generate sparks, arcs and dangerous temperatures in a flameproof enclosure, which separates the internal space of the camera from the surrounding environment. There are gaps in the explosion-proof enclosure. Due to the respiration and gas penetration of electrical equipment, there may be explosive gas mixtures inside. When it explodes, the enclosure can withstand the explosion pressure generated without damage. At the same time, the structural gap of the enclosure can cool the flame and reduce The flame propagation speed or termination of the acceleration chain prevents flames or dangerous flame products from passing through the flameproof gap to ignite the external explosive environment, thereby achieving the purpose of flameproofing. Therefore, many security companies mainly produce such flameproof enclosures.