Thin-wall pipeline sealing device with conical structure

The invention discloses a rubber sealing device with a thin-wall conical structure, which is mounted between a spherical surface and a conical surface; after a conical surface joint and a spherical surface joint are mounted, the rubber sealing device is extruded to be in sufficient contact with two sealing surfaces to form a sealing contact surface; the rubber sealing device is of the conical structure as a whole, has the wall thickness of 0.5mm and is manufactured by using fluorosilicone rubber or a fluororubber material; the radius of a cone is same as that of the spherical surface matched with the cone, so that the cone is kept to be fitted with the spherical surface in a mounting process; the large opening end of the cone is provided with an outer edge for stopping external foreign matters from entering a sealing cavity, and the sealing device is prevented from being damaged in the mounting process; and the small opening end of the cone is provided with a 90-DEG flanging edge for stopping the sealing devi