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石化企业的某些设备要常常定期打开清洗、吹扫或检修,要经常拆装某些法兰的螺栓,比较费时费力,为节省拆装螺栓的时间,设计了一种易拆装螺栓。 下面以M24的易拆螺栓为例来说明,见图。在圆开口拆卸头1上铣出的开口尺寸d略大于易拆螺栓2的细部直径φd(图中是尺寸φ19_(+0.20)~(+0.50)mm和φ19hll)。当螺母3松开1～2扣后,卸掉了易拆螺栓的压紧力和摩擦力,同时,螺栓的头部可以向上退出圆开口拆卸头1的定位槽(槽深1.5mm,见图),从而圆开口拆卸头1可以径向从易拆螺栓2的细部直径处抽出。又由于标准法兰的螺栓孔总比螺栓直径大2～3mm,易拆螺栓2可以向下从法兰螺孔中取出。由
Some petrochemical enterprises often have to regularly open the cleaning, purging or overhauling. To frequently disassemble and install bolts of some flanges, it takes a lot of time and labor. In order to save the time for dismounting bolts, an easy-removable bolt is designed. The following to M24 bolts for example to illustrate, see figure. The size d of the opening milled on the circular opening removal head 1 is slightly larger than the fine diameter φd of the easy-removable bolt 2 (dimensions φ19 _ (+0.20) to (+0.50) mm and φ19h11 in the figure). When the nut 3 is loosened by 1 to 2, the pressing force and friction force of the detachable bolt are removed, and at the same time, the head of the bolt can be withdrawn upward from the positioning groove of the circular opening removal head 1 (the groove depth is 1.5 mm, see figure ) So that the circular opening removal head 1 can be radially withdrawn from the detail diameter of the easy-removable bolt 2. Since the bolt hole of the standard flange is always 2 to 3 mm larger than the bolt diameter, the detachable bolt 2 can be removed downward from the flange bolt hole. by