Interference fit-type flange

Abstract

The invention discloses an interference fit-type flange. The interference fit-type flange comprises a first flange plate and a second flange plate which are fixed by bolts; a flange connecting pillaris arranged above the first flange plate; the inner wall of the top end of the flange connecting pillar is in a stepped shape to form a multi-stage ring connecting groove; a self-adjusting gasket is arranged between the first flange plate and the second flange plate; the self-adjusting gasket mainly consists of a ring flat gasket, an isolating layer and a protecting layer, wherein the isolating layer is attached to the surface of the ring flat gasket, and the protecting layer is attached to the surface of the isolating layer; the upper surface and the lower surface of the isolating layer bothprotrude outwards in an equally spaced manner to form a plurality of concentric ring sealing tapes penetrating through the protecting layer; an oil cavity is formed in the ring flat gasket; the oil cavity extends into all the ring sealing tapes; a proper amount of hydraulic oil is held in the oil cavity; ring sealing grooves are correspondingly formed in the first flange plate and the second flange plate in a manner of corresponding to the ring sealing tapes; and the ring sealing tapes and the ring sealing grooves are in interference fit. By installing the self-adjusting gasket, not only is interference fit realized but also installation is convenient.

Description

technical field [0001] The invention relates to the technical field of petroleum pipeline sealing, in particular to an improved interference fit flange. Background technique [0002] Since the beginning of the 21st century, the contradictions between economic development and energy supply and environmental protection have become increasingly prominent, and countries all over the world have taken "safety, efficiency, environmental protection, and economy" as the theme of industrial development. This trend is mainly reflected in the safe operation of high-temperature equipment and the tightness of connection systems in the petrochemical industry. [0003] Flange connection is widely used in the connection of pressure pipes in petrochemical industry due to its advantages of easy disassembly and assembly. The flange end face of the commonly used convex flange is a convex platform. Under high temperature and high pressure conditions, the flange will generate a bending moment, ...

AI Technical Summary

Problems solved by technology

However, since the volume of the sealing boss is larger than the volume of the sealing groove, the form of interference fit makes the flange assembly process very difficult. At the same time, the flange and the pipe are affected by heat and other environments in different environments, and the size may have slight deviations. The flange and the pipe diameter do not match during the welding process, which affects the quality of the project

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