Characteristics and working environment requirements of explosion-proof control box

1 The shell of explosion-proof control box is made of steel plate welding or cast aluminum alloy or 304 stainless steel by die-casting, with high-voltage electrostatic spraying on the surface Generally, the product is a composite structure composed of explosion-proof shell and increased safety shell 2 The explosion-proof elements in the explosion-proof shell can be equipped with explosion-proof buttons, explosion-proof elements, explosion-proof signal lights, explosion-proof transfer switches and explosion-proof instruments and other explosion-proof elements, as well as common electrical elements such as AC contactors, thermal relays, temperature controllers and various functional modules; the buttons, control switches and instruments in the increased safety shell are explosion-proof elements 3 The internal components of the control box are arranged according to the user's requirements, which can realize various functions 4 Please indicate the color of the built-in components and signal lights when selecting the model The product varies according to the user's requirements When ordering, the electrical circuit diagram must be provided 5 Wiring mode Steel pipe or cable, explosion-proof hose can be 6 Explosion-proof control box can be divided into vertical and hanging type In general environment, partial forced ventilation is better than natural ventilation and group forced ventilation in diluting explosive dissimilates The results will narrow the area of the injury situation, even to a negligible extent Maybe it will become a lower sex area category Even become a non injury situation The classification of injury occasions is based on the general work of ventilation assembly If the damage caused by ventilation assembly fault can be ignored, for example, when other active standby systems are set up, there is no need to modify the damage situation classification based on the premise of ventilation assembly normal work However, if the fault damage of ventilation assembly can not be ignored, the expansion of explosive mixture range without forced ventilation should be looked at, and the frequency and duration of the fault of ventilation assembly should also be looked at for affirmation If the ventilation assembly does not show faults or even has faults for a long time, the damage field caused by the ventilation assembly faults should be expanded If the ventilation assembly is showing faults, measures can be taken to prevent the release of combustible substances (for example, process flow active stop Limited ventilation status of hazardous substances in the environment of explosion-proof control box: if there are hazardous substances affecting ventilation in the injury situation, the scope of the injury situation will be expanded, or it will become a category with high injury When considering the influence of hazardous substances, special attention should be paid to the relative density of gas or vapor in pits and recesses.