1．1拦污栅发生阻塞拦污栅的作用就是阻止水草、树根、生活垃圾等异物进入进水流道,防止其进入泵站结构的内部,对水工建筑物和水力机械造成危害,使泵站的运行受到影响。但是水流所带来的杂物碎块的数量无法预期估计和控制,所以拦污栅前堆积的污物经常不能及时的清理,使得污栅发生阻塞,增加了拦污栅前后的水位着,即增大水流对拦污栅的作用力,严重的甚至会发生拦污栅结构的变形以致遭到破坏。 1.1 trash rack blocking trash rack role is to stop the water plants, roots, garbage and other foreign matter into the inflow channel, to prevent it from entering the pumping station structure, hydraulic structures and hydraulic machinery so that harm The operation of the pumping station is affected. However, the amount of debris caused by water flow can not be estimated and controlled. Therefore, the accumulated dirt in front of the trash can often can not be cleaned in time, blocking the trash and increasing the water level before and after the trash can Increase the flow of trash rack on the force, serious or even trash rack structure deformation will occur to be destroyed.