Sealing device for graphite pipe type heat exchanger tube sheet and heat exchange pipe

Abstract

The invention discloses a sealing device for a tube sheet and a heat exchange pipe of a graphite pipe type heat exchanger and aims to solve the problems that by an existing sealing device, threads on sealing holes are easy to damage, a sealing structure and a mounting process are complicated, radial gaps cannot be complemented by a sealing ring and the like. The sealing device is provided with an inner sealing ring (3), a metal casing (2) and an outer sealing ring (4) from inside to outside, the metal casing is provided with an inner side plate (21) and an outer side plate (22) from the inside to the outside. An annular bottom plate (23) is arranged at the bottoms of the inner side plate and the outer side plate, an annular cover plate (5) is arranged at the tops of the inner side plate and the outer side plate and provided with holes (51). A cavity is formed by the inner side plate, the outer side plate, the bottom plate and the cover plate, and expansion rubber (1) is arranged in the cavity and is water-absorbable or oil-absorbable rubber. The sealing device for the tube sheet and the heat exchange pipe of the graphite pipe type heat exchanger is mainly used for a graphite type heat exchanger in the petrochemical and coal chemical industries and the like.

Description

technical field [0001] The invention belongs to the technical field of sealing devices, and relates to a sealing device for a tube plate and a heat exchange tube of a graphite tube heat exchanger. Background technique [0002] Heat exchangers used in petrochemical, coal chemical and other industries are generally made of metal materials, but when the heat exchange medium is corrosive, heat exchangers made of metal materials obviously cannot meet the use requirements. To enable the heat exchanger to work in a corrosive environment, graphite tube heat exchangers can be used. The tube sheets and heat exchange tubes of graphite tube heat exchangers are made of graphite materials; graphite materials have good heat transfer performance and strong corrosion resistance. However, graphite is a brittle material and is easily damaged; the graphite tube plate and the heat exchange tube cannot be welded and sealed, and sealing packing or adhesive bonding is usually used for sealing. Ad...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a sealing device for graphite tube heat exchanger tube sheets and heat exchange tubes, to solve the problems of the existing sealing devices that the threads on the sealing holes are easily damaged, the sealing structure and installation process are relatively complicated, and the sealing The ring cannot compensate for problems such as radial clearance

[0006] Adopting the present invention has the following beneficial effects: (1) when the sealing device of the present invention is in use, the sealing hole on the tube plate does not need to be processed with threads, which avoids the sealing reliability of the existing sealing device due to the easy damage of the threads Problems with lowering or seal failure

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