Method for hole sealing by means of expansion manner
A hole and linear expansion coefficient technology, applied in heat exchanger sealing devices, heat exchanger fixing, heat exchange equipment, etc., can solve the problems of the failure of the surrounding hole sealing structure, affecting the sealing performance of the surrounding holes, and the plastic deformation of the inner wall of the tube hole. , to achieve good blocking effect, gentle stress, and large contact sealing area.
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[0028] It should be noted that the terms "inner" and "outer" used in the description of the present invention respectively refer to directions toward or away from the geometric center of a specific component (such as a "hole", etc.), and these are only for the convenience of describing the present invention and The description is simplified, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.
[0029] A method of plugging holes by means of expansion:
[0030] The densely distributed holes 1 on the metal tube sheet 0 of the heat exchanger are all cylindrical sleeves, and the diameter of a single hole 1 is 65mm.
[0031] (1) Processed a cylindrical metal plug made of No. 7 zinc alloy with a radial outer diameter (diameter) of 65.5mm at room temperature. The cylindrical metal plug is provided with the oute...
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