Blocking strip for welding plate heat exchanger, plate bundle and processing method

The invention provides a blocking strip for welding a plate heat exchanger, a plate bundle and a machining method, the blocking strip is manufactured by a cold drawing forming process through a die, and the blocking strip is in a pentagonal prism shape similar to a containing cavity between adjacent plate pairs in size and shape. The plugging strip is a pentagonal prism formed through cold drawing of a mold, the plugging strip formed through cold drawing is small in deformation, easy to machine and low in cost, the thickness of the plugging strip can be customized according to the requirements of working conditions, and the phenomenon that the plate heat exchanger is torn and leaks due to the fact that the plugging strip is too thin is avoided; and the accommodating cavity with the pentagonal cross section can be well filled with the pentagonal-prism-shaped blocking strip, so that the phenomenon of flow leakage is reduced, and the heat exchange efficiency is improved. 本发明提供一种用于焊接板式热交换器的堵条、板束及加工方法，堵条是通过模具采用冷拔成