某船厂自由式卧倒门(图l),其门体宽度为19米,高7.36米,由50吨钢材和25吨混凝土压载等构成,总重约80吨。门体断面呈P型,在它的下面装有四个滚轮,卧倒门就是由这四个滚轮自由搁置于船坞坞首外侧的圆弧形轮座上—这就是自由式卧倒门的主要特征。 该卧倒门启闭过程均由船坞后方纹车 A shipyard free-style lying down the door (Figure l), the door width of 19 meters, 7.36 meters high by 50 tons of steel and 25 tons of concrete ballast, etc., weighing a total of about 80 tons. The cross section of the door is P-shaped, with four rollers beneath it. The reclining door is free to rest on the arc-shaped seat on the first outside of the docking dock by the four rollers - this is the main part of the free- feature. The sleeper door opening and closing process by the rear of the dock pattern car