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一、问题的提出据盐城市劳动部门统计,1985年全市拥有各类锅炉550台,其中类似于KZL或KZG型锯炉约占80%左右,该类型的锅炉后管板渗漏故障时有发生,有的在一台锅炉上连续发生数次,据不完全统计1985年发生后管板胀口渗漏事故15起,其中9起是由明显原因发生渗漏的,如缺水,结垢及制造质量等,但其中6起经现场宏观检查、没有发现缺水和明显超温现象。渗漏管孔的分布没有明显的规律。类似的后管板胀口渗漏现象在许多杂志上都有报道。有的制造厂将后管板改为焊接结构
First, the issue put forward According to Yancheng labor department statistics, in 1985 the city has 550 boilers of various types, of which similar to KZL or KZG-type saw furnace about 80%, this type of boiler tube plate leakage occurred from time to time , And some occurred continuously on a boiler several times. According to incomplete statistics, there were 15 cases of seepage of pipe expansion after the occurrence in 1985, of which 9 cases were caused by obvious reasons such as water shortage, scaling and Manufacturing quality, but 6 of them by the scene of macro-examination, found no water and significantly over-temperature phenomenon. There is no obvious regularity in the distribution of the leakage tube holes. Similar post-tube plate expansion port leakage has been reported in many magazines. Some manufacturers will be after the tube plate to welding structure