Double-shell-pass heat exchanger and auxiliary mounting tool for sealing strips in tube bundle of double-shell-pass heat exchanger

The utility model relates to the technical field of double-shell-pass heat exchangers, in particular to a double-shell-pass heat exchanger and an auxiliary installation tool for sealing strips in a tube bundle of the double-shell-pass heat exchanger, and aims to solve the problems that when a tube bundle in an existing double-shell-pass heat exchanger is assembled with a shell-pass cylinder, the sealing strips in the tube bundle are extremely prone to plastic deformation due to misoperation of workers, and the sealing strips cannot be installed easily. The improved auxiliary mounting tool for the sealing strips in the double-shell-pass heat exchanger and the tube bundle of the double-shell-pass heat exchanger is characterized in that strip-shaped guide blocks are fixed on two sides of the same diameter line of the inner wall of a shell-pass barrel and axially penetrate through the shell-pass barrel; the middle portions of the two guide blocks abut against the two ends of the layering partition plate in the wi