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目前国内有三种收发球筒盲板,法兰式盲板、法兰式快开盲板和由四川石油管理局设计的蝶形快开盲板。这些端盖盲板与收发球筒壳体的连接都是采用12个 M30以上的螺栓连接,后两者采用了快速连接螺栓,节省了穿螺栓和不用全部松掉螺帽的时间,与前者相比提高了拆装速度,故称为“快开盲板”。但工人拆、装一次也还需20～30min。为了减轻工人的劳动
At present, there are three kinds of receiving and dispatching dome blinds, flange blinds, flanged blinds blinds, and butterfly open blinds designed by Sichuan Petroleum Administration Bureau. The connection between these blind caps of the end caps and the housing of the receiving and sending cylinder is made by using more than 12 bolts of M30, the latter two adopt quick connecting bolts, saving the time of wearing the bolts and not completely loosening the nut, Than to improve the disassembly speed, it is called “fast open blind.” However, the demolition of workers, once also need to install 20 ~ 30min. In order to reduce the labor of workers