The invention discloses an automatic
pressure release tank cover structure for a
firefighting truck water tank, which belongs to a
firefighting facility. The automatic
pressure release tank cover structure comprises a liquid storing tank, a first connecting seat and a second connecting seat, wherein the top of the liquid storing tank is provided with a manhole; a tank cover base is formed in the circumferential direction of the manhole; the first connecting seat and the second connecting seat are kept 180 degrees away from each other along the circumferential direction of the tank cover base; the tank cover and the tank cover base are matched with each other in a covering way; a floating connecting mechanism is arranged in the center of the tank cover, and is connected with the middle part of a tank cover
pipe frame; and the tank cover
pipe frame is matched with the first connecting seat and the second connecting seat. The automatic
pressure release tank cover structure is characterized by further comprising a bare hand operating arm and a safety pin, wherein one end of the bare hand operating arm is matched with the first connecting seat, and is connected with one end of the tank cover
pipe frame; the middle part of the bare hand operating arm is provided with a lock pin
flange probing hole; the other end of the bare hand operating arm is made into a
handle; one end of the tank cover pipe frame is made into a lock pin
flange; and the safety pin is matched with the lock pin
flange. The automatic pressure release tank cover structure has the advantages that the tank cover can be opened or closed rapidly in a bare-handed state; operation is performed in a labor-saving way, and gripping is reliable; the closing effect is good; and convenience is brought to manufacturing and installation.