The difference between explosion-proof surveillance camera and traditional surveillance camera in terms of explosion-proof camera itself, there is no essential difference between photoelectric structure and ordinary industrial camera. The utility model is characterized in that one or more explosion-proof types are used to process the industrial camera, so that it can be applied in the flammable and explosive field environment.

2、 Working principle of explosion-proof security surveillance camera
The early explosion-proof surveillance cameras were mainly intrinsically safe and positive pressure. The intrinsically safe explosion-proof camera is characterized by intrinsically safe treatment of the camera circuit. The electrical circuit output or input are designed to be controlled below the energy that is insufficient to produce ignition and explosion of hydrogen, so that it will not produce electric spark, electric arc and high temperature in normal operation, so as to avoid detonating explosive substances. The high unit cost of this type of explosion-proof camera structure is a disadvantage. In addition, it is not conducive to future upgrading.

The positive pressure type is a common structure of the early American explosion-proof security surveillance camera products. It is inconvenient to maintain in use. If it is not carefully maintained, it will be quite dangerous to detonate.

3. Types of explosion-proof surveillance cameras
At present, the types of explosion-proof surveillance cameras can be divided into three levels according to the explosion-proof level, and the main explosion-proof surveillance cameras are explosion-proof. The utility model is characterized in that a conventional ordinary camera is placed in a special shell, the shell has the function of separating the spark and arc generated by the electrical components in the shell from the explosive mixture outside the shell, and can withstand the explosion pressure generated when the explosive mixture entering the shell is detonated by the spark and arc of the electrical equipment in the shell without damaging the shell; At the same time, it can prevent the explosive products in the shell from propagating to the explosive mixture outside the shell, and will not cause the combustion and explosion of the explosive mixture outside the shell.