一、起拱的原因起拱是存仓排料口的散粒物料堵塞、积聚成拱形不能进行卸料的现象。根据起拱的实际情况大致可分为如下四类(图1): (a)拱架状——排料口附近的物料互相支撑而堵塞;(b)堵锥口——物料被积存在圆锥 First, the cause of the arch The arch is the storage of bulk material discharge port blockage, accumulation of arches can not be unloaded phenomenon. According to the actual situation arching can be divided into the following four categories (Figure 1): (a) arch-like - near the nest material support and block each other; (b) blocked cone mouth - the material is stored in the cone