Self tightening flow passage sealing structure

Abstract

The invention provides a self tightening flow passage sealing structure. The self tightening flow passage sealing structure is arranged inside equipment or a pipeline and comprises a shell, a sleeve and a baffle; the shell is fixed on a support platform through a cover plate and is provided with a cavity, an inlet and an outlet, and both the inlet and the outlet communicate with the cavity; the sleeve is hollow tubular and is fixed on the cavity, a gap is formed between the sleeve and the cavity through a flanging provided by the outer wall, and the outer wall of the sleeve is provided with aboss and a guide hole; the baffle is annular, sleeves the sleeve, and is arranged in the gap, the outer ring is fixed on the inner wall of the cavity, and the inner ring is connected with the boss ina gap; and the thermal expansion coefficient of the sleeve is different from that of the shell and/or the baffle, so that the sleeve, the shell and/or the baffle are heated to expand to generate the thermal expansion difference when heated liquid flows in the sleeve, the shell and/or the baffle, and the sealing effect is achieved by the relative extrusion of the boss and the baffle. The self tightening flow passage sealing structure uses the thermal expansion characteristic of materials to seal, so that the structure is simpler, the reliability is higher, the service life is longer, and the manufacturing difficulty and the manufacturing cost are reduced without regular maintenance.

Description

technical field [0001] The invention relates to the technical field of equipment and pipeline sealing, in particular to a self-tightening flow channel sealing structure. Background technique [0002] At present, equipment and pipelines in nuclear power, petrochemical and other industries usually use metal sealing rings, gaskets and other sealing structures. When the liquid flows inside, it is very corrosive to this type of sealing structure, and it is easier to reduce the service life of this type of sealing structure. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present invention is to provide a self-tightening flow channel sealing structure, which uses the thermal expansion characteristics of the material for sealing, so that the structure is simpler, the reliability is high, and the service life is long, and no regular maintenance is required. Manufacturing difficulty and manufacturing cost are reduced. [0004] In or...

AI Technical Summary

Problems solved by technology

[0002] At present, equipment and pipelines in nuclear power, petrochemical and other industries usually adopt sealing structures such as metal sealing rings and gaskets. Such sealing structures are easy to be scratched and have a short service life. When the liquid flows inside, it is very corrosive to this type of sealing structure, and it is easier to reduce the service life of this type of sealing structure

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