1、为了避免管道的重量及管道热应力所产生的力和力矩超过抽沙船进出口的大允许外载荷,在抽沙船的吸入和排出管道上须设置管架。泵管口允许大载荷应由抽砂泵制造厂提供。
2、为了提高沙泵的吸入性能,泵吸入管路应尽可能缩短,尽量少拐弯,以减少管道阻力损失。为防止抽沙泵产生汽蚀,泵吸入管路应尽可能避免积聚气体的囊形部位,不能避免时,应在囊形部位设DN15或DN20的出气阀。一旦泵的吸入管为垂直方向时,吸入管上若配置异径管,则应配置偏心异径管,以免形成气囊。
3、垂直进口或垂直出口的泵,为了减少对泵管口的作用力,管口上方管线须设管架,其平面位置要尽量靠近管口,可以利用管廊纵梁支吊管线,所以常把泵布置在管廊下。
4、单吸泵的进口处,吸沙泵好配置一段约3倍进口直径的直管。
5、对于双吸入泵,为了避免双向吸入水平离心泵的汽蚀,双吸入管要对称布置,以保证两边流量分配均匀。垂直管道通过弯头直接连接,但泵的轴线一定要垂直于弯头所在的平面。此时,进口配管要求尽量短,弯头接异径管,再接进口法兰。在其它条件下,抽沙泵进口前应有不小于3倍管径的直管段。
1, in order to avoid the weight of pipeline and pipeline heat should force and torque force generated by over pumping sand import and export of the maximum allowed load, pumping sand suction and discharge piping shall be provided on the pipe rack in the. Pump outlet allows maximum load by sand pump manufacturer.
2、为了提高沙泵的吸入性能,泵吸入管路应尽可能缩短,尽量少拐弯,以减少管道阻力损失。为防止抽沙泵产生汽蚀,泵吸入管路应尽可能避免积聚气体的囊形部位,不能避免时,应在囊形部位设DN15或DN20的出气阀。一旦泵的吸入管为垂直方向时,吸入管上若配置异径管,则应配置偏心异径管,以免形成气囊。
2, in order to improve the suction performance of sand pump, pump suction line should be as short as possible, as little as possible to reduce the loss of the bend pipe resistance. In order to prevent sand pump cavitation, the pump suction line should be as much as possible to avoid the accumulation of gas in the capsule shaped parts, can not be avoided, should be in the capsule shaped parts design air outlet valve DN15 or DN20. Once the pump suction pipe for the vertical direction, the suction pipe if the configuration of different diameter pipe, you should configure the eccentric reducer, so as to avoid the formation of air bag.
3、垂直进口或垂直出口的泵,为了减少对泵管口的作用力,管口上方管线须设管架,其平面位置要尽量靠近管口,可以利用管廊纵梁支吊管线,所以常把泵布置在管廊下。
3, imported vertical or vertical export pump, in order to reduce the forces on the pump nozzle, nozzle at the top of the pipeline shall set up the pipe rack, the plane should be as close to the nozzle position, can use the pipe rack rails for supporting and hanging pipeline, so the pump arranged in the pipe Gallery.
4、单吸泵的进口处,吸沙泵好配置一段约3倍进口直径的直管。
4, single suction pump inlet, suction sand pump is the best configuration of a section of about 3 times the inlet diameter of the straight pipe.
5、对于双吸入泵,为了避免双向吸入水平离心泵的汽蚀,双吸入管要对称布置,以保证两边流量分配均匀。垂直管道通过弯头直接连接,但泵的轴线一定要垂直于弯头所在的平面。此时,进口配管要求尽量短,弯头接异径管,再接进口法兰。在其它条件下,抽沙泵进口前应有不小于3倍管径的直管段。
5, for the double suction pump, in order to avoid the double suction horizontal centrifugal pump cavitation, double suction tube to be symmetrical arrangement, to ensure that both sides of the flow distribution uniformity. The vertical pipe is directly connected with the elbow, but the pump axis must be perpendicular to the plane of the elbow. At this time, import regulatory requirements as short as possible, then bend diameter pipe, and then connected with the inlet flange. Under other conditions, the inlet of the pumping sand pump shall be not less than 3 times the diameter of the straight pipe. |