过去火焰弯管机一般都使用圆形整体结构。它的断面形状复杂,制造十分困难,特别是需要内外焊接,变形不容易控制,并且很难保证气室与水室间的气密性能,因此,在使用过程中,也常因气密性能不佳,而引起圆火爆炸。同时,在装配焊接时,焊料 In the past, the flame bender generally used a circular overall structure. Its sectional shape is complex and it is very difficult to manufacture. In particular, it requires internal and external welding, deformation is not easy to control, and it is difficult to ensure airtight performance between the air chamber and the water chamber. Therefore, in the course of use, airtightness is often not Good, causing a round fire explosion. At the same time, during assembly soldering, solder