METHOD FOR MANUFACTURING OF MULTILAYER COIL HEAT EXCHANGER Russian patent published in 2022 - IPC F28D7/02 

FIELD: power engineering.

SUBSTANCE: invention relates to power engineering and can be used for winding heat exchangers in the nuclear industry, in particular for the manufacture of a line of twisted heat exchangers for recovery, as well as in the oil and gas industry. The method for manufacturing a multilayer coil heat exchanger with a central cylindrical mandrel comprises the placement on one end of the central cylindrical mandrel of an input support board with holes made for the ends of pipes, sequential winding of rows of coil pipes on spring spacers, the first row of which is attached to the central cylindrical mandrel, the installation of an output support board made of a composite of concentric annular elements with the placement of the axes of holes under the output ends of the pipes on the circumferences of the connectors, wherein the output support board is assembled sequentially after winding each row, followed by attachment of the tail part of the wound pipe in the output support board, while the first the pipe is wound into the holes of the input support board having a closed curved shape, then the pipe is wound sequentially with a change in the direction of winding each row to the opposite on springy spacer spacers, which are corrugated, diagonally directed strips having periodically repeating grooves of precision shape, made in such a way that the entrance to the groove has a size smaller than the diameter of the heat exchange pipe within its fit, and the contact area with the pipes is located inside the groove, while holes of a closed curved shape are made in the input support board.

EFFECT: increasing the operational reliability of the heat exchanger while increasing the manufacturability and significantly reducing the cost of manufacturing spacer elements.

2 cl, 6 dwg