SEALING DEVICE WITH CONICAL CONTACTING SURFACE AND O-TYPE SOLID SEALING RING

The utility model belongs to the seal technique of vessel (with general pressure). The utility model is a novel seal form with improved design for solving the problem of sealing the quick-opening door of a welded vessel. The utility model is characterized in that a flange is provided with a regular conical surface abutted with a circular elastic solid seal ring embedded in the other flange, opposite pretightening force is applied between two flanges, and the seal ring is compressed and tightly clung on the conical surface for obtaining sealing effect under the action of the opposite pretightening force. The size of sealing force needing to be obtained can be realized via changing the size of cone angle and increasing and decreasing the pretightening force. When the technique is carried out, the requirement of the geometric accuracy of circular degree when welding the flange is controlled.