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一、一般概念(一)砂泵多为离心式,因为它比起往复式来没有紧密的摩擦面,而且流道宽畅,不易堵塞,同时构造简单,拆卸也方便。砂泵多是一级,其最大扬程为30公尺。苏联之HΠ型砂泵输送矿浆浓度最大为65％。在理论上输送矿浆中所含最大的固体粒度只要小于工作轮叶口尺寸就可以,但实际使用时可使工作轮叶口尺寸为最大粒度之2～3倍,同时输送管子的直径也要大于三倍的最大矿粒直径。中心吸入式砂泵吸入高度为2～3公尺,苏联ΠH型砂泵最大吸入高差为3公尺。侧进水式(通常称之为威尔弗雷型)则必须有1～1.5公尺高差压
First, the general concept of (a) sand pump and more centrifugal, because it than the reciprocating to no close friction surface, and the flow channel is wide, easy to plug, at the same time simple structure, disassembly is also convenient. Sand pump is more than one level, the maximum lift of 30 meters. The HΠ-type sand pump in the Soviet Union delivers a maximum of 65% slurry concentration. Theoretically, the maximum solid particle size contained in the transported slurry can be smaller than the size of the working vane, but in actual use, the size of the working vane can be 2 to 3 times of the maximum particle size, and the diameter of the conveying pipe should be greater than Three times the maximum ore diameter. Center inhaled sand pump inhalation height of 2 to 3 meters, the Soviet Union Π H sand pump maximum inhalation height difference of 3 meters. Side-inlet type (often referred to as Wilfred type) must have 1 to 1.5 meters high differential pressure