水泵对吸压水管路的请求(国外英文资料).doc

水泵对吸压水管路的要求(国外英文资料) Water pump requirements for suction piping Release time: 2012-7-13 reading: 705 (font size: large medium small) The suction line usually works under negative pressure, so the basic requirements for the water suction line are not leakage, gas, and non-inspiratory. 1) to ensure that the suction pipe is not leaky, the tube must be strict. As a result, the suction line is generally used for steel pipe, and when the pipe is buried in the soil, the asphalt coating should be applied. When using cast iron pipe, the joints must be strict when construction. 2) the suction pipe in order to ensure product gas, suction pipe should be along the gradient in the direction of flow of the continuous rising, I generally greater than 0.005, to avoid to produce airbag, should make its highest level along the suction line at the top of the pump suction. Suction pipe section generally should be greater than the pump inlet section, variable diameter tube can be used on the road in the suction pipe eccentric reducer (namely eccentric reducer), keep the top of the reducer level, pump imported should avoid to be directly connected to the elbow, should be equipped with a straight pipe between them. 3) dont inhale. When the inlet of the suction tube is not deep enough, it is carried in a large amount of air because of the vortex of the water in the inlet and the suction of the water. The pump will also be damaged when serious. In this case, the water pump room is used to absorb water when the river is dry. In order to avoid the vortex of the water suction well, the water pump suction air, and the submerged depth h should not be less than 0.5 m minus 1.0 m. 4) in order to prevent the water pump from drawing in the slag from the bottom of the well, and make the pump work with good hydraulic conditions, the following rules shall be observed: A. the import of suction pipe to the bottom of the vertical distance (i.e., dangling height), appropriate USES 0.6 0.8 D D for the suctio