Valve assembly of automobile water tank cover

The automobile water tank cover valve assembly comprises an outer cover, a connecting shaft is arranged at the geometric center position of the top of the outer cover in a sliding mode, a plurality of exhaust holes are formed in the position, close to the connecting shaft, of the outer cover in the circumferential direction, and the connecting shaft is sleeved with an exhaust spring abutting against the upper side of the outer cover. The end part of the lower end of the connecting shaft penetrates through the upper cover and extends to the lower side of the outer cover, an inner cover is arranged at the end part of the lower end of the connecting shaft, the connecting shaft is sleeved with a sealing gasket between the outer cover and the inner cover, the sealing gasket abuts against an exhaust hole of the outer cover and separates the upper side and the lower side of the outer cover, and the inner side and the outer side of the outer cover are communicated and closed by pushing the connecting shaft. Therefore