Pumping main oil cylinder piston sealing structure with long service life

The utility model relates to the field of pumping oil cylinders, and aims to solve the problems that in the prior art, the inner wall of a barrel is difficult to machine, a groove in a piston is difficult to machine, the pumping performance cannot be guaranteed, an intelligent control technology of a concrete pump cannot pick up electric control signals, the production and manufacturing cost is high, a special piston sealing ring is easy to damage, and a pumping main oil cylinder is short in service life. The piston sealing structure of the pumping main oil cylinder is long in service life and comprises a barrel. A piston is arranged in the cylinder body, and the peripheral surface of the piston is attached to the inner wall of the cavity in a sliding manner; a guide ring, a metal piston ring and a special piston sealing ring are sequentially arranged on the outer surface of the piston. The concrete pump has the advantages that the inner wall of the barrel is easy to machine, the grooves in the piston are eas