ＺＭＢ 2 4 0型隔膜泵 (以下简称为隔膜泵 )是近几年我国大批推广的机动喷雾泵之一 ,该泵的特点是 :构造简单 ,排液量大 ,正、反转都能工作 ,允许短时间脱水运转 ,药液不直接与活塞接触等 ,因此深受农户欢迎。但使用不当 ,也会出现许多故障 ,其中吸不上药液是最为常见的故障。 ZMB 2 40 type diaphragm pump (hereinafter referred to as the diaphragm pump) is one of the most popularized motor spray pumps in China in recent years. The pump is characterized by simple structure, large displacement, positive and reverse rotation, Allow a short period of dehydration operation, the liquid does not directly contact with the piston, so welcomed by farmers. However, improper use, there will be many failures, including fluid is not the most common failure.