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如今在各种工业与民用建筑设施中已广泛采用阻燃型硬塑料管作为电力、电信、消防报警等线路的保护管。当安装大管径阻燃型塑料管并缺少配件时,其管子接头的胀接,管子弯头的煨制等工作需要在施工现场根据实际情况进行加热处理后完成。通常的加热方法是在施工现场选择一个较宽敞平坦的地方支起一个电阻炉,然后将待加工的塑料管放在电阻炉上部进行烘烤,(?)使管子受热均匀,还须不停转动管子,以改善管子的受热条件,若在管径大、管子长的情况下,还须两人同时进行操作,这样既费力又费时,给施工者带来很多的不便。 笔者经过多次实践,成功地试制了一种塑料管新的加热工具(见示意图),它由薄铁
Today, flame-retardant hard plastic pipes have been widely used as protective tubes for power, telecommunications, fire alarms and other lines in various industrial and civil construction facilities. When a large-diameter flame-retardant plastic pipe is installed and an accessory is missing, the expansion of its pipe joints and the tanning of the pipe elbow need to be completed after the heat treatment at the construction site according to actual conditions. The usual heating method is to choose a relatively flat and spacious place to erect an electric resistance furnace at the construction site, and then place the plastic pipe to be processed on the upper part of the electric resistance furnace for baking, so that the pipe is heated evenly, and it is necessary to keep turning Pipes, in order to improve the heating conditions of the pipes, if the pipe diameter is large and the pipe is long, two people must also perform the operation at the same time, which is laborious and time-consuming, and brings a lot of inconvenience to the constructor. After many times of practice, the author successfully tried a new heating tool for plastic pipes (see diagram), which was made of thin iron.