Upper cylinder valve body for coating machine coating cylinder

The utility model discloses an upper cylinder valve body for a coating machine coating cylinder. The valve body comprises a valve main body. The outer side surface of the upper portion of the valve main body and the outer side surface of the lower portion of the valve main body are provided with threads, the lowest end of the middle of the valve main body is provided with a coating output opening, an internally embedded thread is formed in the output opening, an integrated protruding clamping ring is arranged at the lowest end of the upper portion of the valve main body, the upper portion and the exterior of the valve main body are provided with a nut sealing ring with clamping jaw grooves to perform sealing connection, an O-shaped sealing ring between the integrated protruding clamping ring arranged in the lowest end of the upper portion of the valve main body and the nut sealing ring performs sealing connection on the upper portion of the valve main body, the integrated protruding clamping ring and the nut sealing ring clamp the O-shaped sealing ring, and the lower portion of the valve main body is connected with the coating cylinder in a sealed mode. As a whole, the upper cylinder valve body has the advantages that the weight is light, the cost is low, the transportation is convenient, the work efficiency is high, the sealing ring keeps high coaxiality with a piston connecting rod, the service life is long, and the sealing degree is high.