L-shaped isostatic pressing sealing structure and cylindrical body structure of working cylinder

The invention discloses an L-shaped isostatic pressing sealing structure and a cylindrical body structure of a working cylinder. The L-shaped isostatic pressing sealing structure comprises a pressing plate, and a metal ring is arranged outside the pressing plate; the metal ring is an L-shaped metal ring, a first groove is arranged outside one edge of the L-shaped metal ring, and a second groove is arranged outside the other side of the L-shaped metal ring; a first rubber ring is arranged in the first groove; a second rubber ring is arranged inside the second groove. The L-shaped isostatic pressing sealing structure is applied to the inside of a cylindrical body of the working cylinder. According to the L-shaped isostatic pressing sealing structure and the cylindrical body structure of the working cylinder, by means of the designed L-shaped sealing structure, working mediums in the working cylinder are prevented from flowing out from a gap between the L-shaped metal ring and the inner wall of the cylindrical body of the working cylinder, the sealing between the working cylinder and an end cover is guaranteed, so that an isostatic pressing machine can work normally. Meanwhile, according to a structural style, appropriate rubber ring materials and metal ring materials are selected according to work environments of the isostatic pressing machine so as to complete the low pressure sealing, the high pressure sealing and till the sealing exceeding the high pressure.