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1 实例炉门圈是立式锅壳锅炉的独有元件。它用钢板圈成扁圆筒插在炉门外,里、外端分别与炉胆、锅壳用角焊焊接,是现有立式锅炉常见的炉门样式。有些立式锅壳锅炉的炉门圈里端发生过裂纹甚至裂穿,造成泄漏,被迫停炉,影响安全生产。这种裂纹与炉门圈伸出炉胆过长有密切关系。下面是一些实例: (1)某腊厂(乡镇企业)使用1台自制的立式锅炉。其结构类似立式弯水管锅炉,只是在锅壳、炉胆上未布置弯水管。蒸发量0.16t/h,最高许可工作压力0.64MPa。炉门圈伸出炉胆24mm。其里端曾产生裂纹2条,裂穿成缝漏水。焊补后又产生裂纹9条,最长的
1 Example The door ring is a unique element of a vertical boiler shell. It uses a steel cylinder into a flat cylinder inserted in the furnace door, the inner and outer ends respectively with the furnace, the shell with a fillet welding, is a common boiler door style vertical boiler. Some vertical shell boiler door ring cracks or cracks in the end occurred, resulting in leakage, forced to shutdown, affecting safety in production. This crack and furnace door ring out of the furnace is too long have a close relationship. Here are some examples: (1) A wax factory (township and village enterprises) uses a homemade vertical boiler. Its structure is similar to the vertical bent water pipe boiler, but the boiler shell and the furnace pipe are not arranged with curved pipes. Evaporation 0.16t / h, the maximum allowable working pressure 0.64MPa. Door ring out of furnace 24mm. There have been cracks in the two end, split into a seam leakage. After welding repair crack 9, the longest