Gas control reversing valve detection device and detection method

The invention discloses a gas control reversing valve detection device which is fixed on a rack. The device comprises a cylinder tooling which blocks a 2 port of an air compressor air inlet interface of a gas control reversing valve, a right cylinder tooling which blocks a 41 port of a pressure regulating valve air inlet interface of the gas control reversing valve, and a left cylinder tooling which blocks a 42 port of an exhaust brake valve control interface of the gas control reversing valve. Each cylinder is provided with a plug. The air inlet of each cylinder carries out air inlet, and a plug which is connected with the cylinder to stretch forward to block an interface of the gas control reversing valve. A positioning seat which fixes the gas control reversing valve is arranged on the rack. A spacing seat is arranged on one end of the positioning seat. A blocking tooling is arranged on one side of the positioning seat. A blocking plate which is corresponding to an 11 port of an air cleaner interface and a 12 port of a turbocharger interface of the gas control reversing valve is arranged on the blocking tooling. The invention further provides a pressure circuit and a detection method of the gas control reversing valve detection device. The detection device provided by the invention has the advantages of high test efficiency and test precision, simple and practical fixation component structure and high clamp precision.