Double collar for pipeline joint and preparation method of double collar

Abstract

The invention discloses a double collar for pipeline joint. The double collar is characterized in that a rear collar is similar to a high-heeled shoe in appearance, the outer wall of the rear collar comprises a front section, a middle section and a rear section, the end face of the front section of the rear collar is perpendicular to the axis, the end face of the rear section of the rear collar inclines forwards, the included angle A between the end face of the rear section and the axis is 60-90 degrees, the included angle B between the front section of the outer wall and the axis is 30-40 degrees, the rear section of the outer wall is parallel to the axis, the middle section of the outer wall comprises three sections of outer walls which are sunken towards the axis, the included angle C between the first outer wall and the radial direction is 40-50 degrees, the included angle D between the second outer wall and the axis is 10-15 degrees, the included angle E between the third outer wall and the radial direction is 35-45 degrees, the middle rear portion of the inner wall of the rear collar inclines outwards, and the included angle F between the inclined face and the axis is 6-10 degrees. The double collar for sealing the nuclear-grade application pipeline is provided with a specific structure and a preparation method, and the use cost of the pipeline joint with the double collar is reduced.

Description

technical field [0001] The invention relates to the field of pipeline sealing, in particular to a double ferrule for pipeline joints and a preparation method thereof. Background technique [0002] The double-ferrule pipe joint is essential in nuclear-grade application equipment. It realizes the main seal between the front ferrule and the pipeline through the double ferrule design of the front ferrule and the rear ferrule, and seals the screw through the rear ferrule. The axial load of the cap is converted into radial pressure on the pipeline, which greatly enhances the tensile performance of the joint on the basis of improving the sealing effect of the front ferrule. The dual ferrule pipe joints used in domestic nuclear power plants are all purchased from abroad, and no domestic products have been found to involve the research and development of dual ferrule pipe joints for nuclear-grade applications, and no domestic products can meet the requirements of nuclear-grade applic...

AI Technical Summary

Problems solved by technology

The dual ferrule pipe joints used in domestic nuclear power plants are all purchased from abroad, and no domestic products have been found to involve the research and development of dual ferrule pipe joints for nuclear applications, and no domestic products can meet the requirements of nuclear applications.

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