Automatic blow-down valve for vehicle

The utility model discloses an automatic blow-down valve for a vehicle, which comprises a valve body, and a valve cavity is arranged in the valve body. The valve core is arranged in the valve cavity in a sliding manner; the valve rod is fixedly connected with the valve core; wherein the valve rod is fixedly connected with the valve core through a core sleeve, and the core sleeve sleeves the outer side of the valve core; a sealing part is arranged between the core sleeve and the valve element and comprises a sealing block arranged on the inner surface of the core sleeve and a sealing groove formed in the outer surface of the valve element. The valve has the advantages that the core sleeve sleeves the outer side of the valve core, on one hand, the valve rod is connected with the valve core, and the valve core is conveniently driven to move in the valve cavity; on the other hand, the valve element can be sealed, sewage in the valve cavity is prevented from entering the valve element, and normal ...