Tool for connecting and sealing plastic pipe plate, pipe plate connecting method and gas-gas heat exchanger

Abstract

The invention belongs to the technical field of plastic pipe plate connecting tools, methods and gas-gas heat exchangers, and discloses a tool for connecting and sealing a plastic pipe plate, a pipe plate connecting method and a gas-gas heat exchanger. The pipe plate connecting method is characterized in that a small hole is drilled, then the plate at the periphery of the bearing hole is flanged to the outer side by heating, after cooling, the hole is expanded and a plastic pipe is inserted into the bearing hole, and the plastic pipe and the plastic plate are hermetically connected together after cooling again; and the diameter of the bearing hole in the plastic plate is reduced due to thermal expansion and cold contraction at high temperature, the diameter of the plastic pipe is increaseddue to thermal expansion and cold contraction, so that the sealing performance is better. In addition, the axial length of the plastic pipe can be lengthened at high temperature, and the flanging isarranged on the periphery of the bearing hole, therefore, the joint of the plastic pipe and the plastic pipe is a smooth surface, the plastic pipe cannot be damaged for the expansion and contraction of the plastic pipe in the axial direction, and the plastic pipe cannot be scratched when the plastic pipe moves in the plastic plate.

Description

technical field [0001] The invention belongs to the technical field of a plastic tube-sheet connection sealing method and an air-gas heat exchanger, and in particular relates to a plastic tube-sheet connection sealing tool and a tube-sheet connection method using the tool. Background technique [0002] Plastic materials are widely used in various fields due to their strong corrosion resistance, acid and alkali resistance, and aging resistance. The connection and sealing of plastic pipes and plastic plates, and the connection and sealing of plastic pipes and plastic pipes are important core processes for making various heat exchange equipment and liquid storage equipment. Metal plates and metal pipes are often sealed and connected by welding, riveting, expansion joints, bonding, etc., and sufficient mechanical strength can completely solve the coefficient of thermal expansion of different materials. The sealed connection of plastic pipes and metal pipes can also be riveted, ...

AI Technical Summary

Problems solved by technology

When the plastic pipe is sealed with the plastic plate, especially when the ambient temperature is greatly different, the thermal expansion coefficient of the material must be considered. Traditional processes such as welding, expansion joints, and riveting cannot meet the normal use of the equipment and cause deformation. , tearing, leakage of various working fluids

Images