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低压锅炉汽包和管子的连接,主要是胀接。胀接法就是用胀管器将管子胀在汽包和联箱上,得到紧固和严密的连接。紧固,就是要使管子的胀接部分能够承受住工作压力(水压或汽压),结构和水的重量产生的重力,以及热膨胀、温度变化所产生的应力,以保证管子不从管孔中拨出。严密,就是要不从管子胀接的地方漏水漏汽。胀少了,胀接口保证不了紧固和严密。如胀过
The connection of the low pressure boiler drum and pipe is mainly expansion joint. The expansion method is to use a tube expander to expand the tube on the drum and the header to obtain a tight and tight connection. Tightening is to make the expanded part of the tube able to withstand the working pressure (water pressure or vapor pressure), the gravity generated by the structure and the weight of water, and the stress caused by the thermal expansion and temperature change to ensure that the tube does not come from the tube hole. Put it out. Strictly speaking, it is necessary to leak steam from places where pipes are expanded. Less inflation, expansion joints can not be tightened and tight. If swollen