Electrical cabinet with positive-pressure anti-corrosion protection function for transformer substation

The electrical cabinet with the positive-pressure anti-corrosion protection function for the transformer substation comprises a positive-pressure cabinet body, and an outer cylinder is fixedly installed in the middle of the top end of the positive-pressure cabinet body. Through the arrangement of the trigger, if the internal air pressure of the positive pressure cabinet body is smaller than the internal air pressure, due to the action of pressure intensity, external air pressure drives the limiting block and the pressing rod to press downwards, the limiting groove presses downwards to extrude the sealing film and meanwhile abut against the ejector rod to descend, the bottom end of the ejector rod presses the trigger after the ejector rod descends, and the trigger can immediately control the electromagnetic air inlet valve to be opened; then gas in external pressure supply equipment is injected into the positive pressure cabinet body, when the air pressure in the positive pressure cabinet body is larger than t