Positive pressure control gas circuit arrangement method of positive pressure explosion-proof system

The invention provides a positive pressure control gas circuit arrangement method of a positive pressure explosion-proof system. The method comprises the following steps: switching on a power supply and opening a positive pressure explosion-proof control valve; more than two gas pipelines arranged in the cavity are used for inflating the cavity in the explosion-proof equipment; one air pipeline is attached to the inner wall of an inner cavity of the explosion-proof equipment for inflation, and the other air pipeline wraps electrical equipment of the inner cavity of the explosion-proof equipment for inflation; one end of the gas pipeline is arranged at a gas inlet of the explosion-proof equipment for gas intake, and the other end is arranged at a gas outlet of the explosion-proof equipment for gas exhaust The air pipeline is provided with a plurality of exhaust holes; and gas replacement is carried out through the gas inlet and the gas outlet to ensure that no harmful gas exists in the inner cavity of the expl