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一、实验出处和改进的原因此实验装置为苏教版《实验化学》专题1“物质的分离与提纯”中的课题3“硝酸钾晶体的制备”中用到的一个仪器。在化学实验中,经常要用抽滤装置进行固液分离,玻璃水泵是该装置不可缺少的关键部件,具有一定压力的自来水为其提供动力。这种装置的缺点十分明显:①玻璃水泵与水龙头相连接的橡胶管在开大水龙头时易被冲开,水柱四射;②玻璃水泵特别容易损毁;③一旦操作不当,易回水污染抽滤液;④玻璃水泵的功率受水压
First, the source of the experiment and reasons for improvement This experimental device for the Supian version of “Experimental Chemistry” topic 1 “separation and purification of substances ” in the subject 3 “potassium nitrate crystal preparation ” used in an instrument. In chemical experiments, often with suction filtration device for solid-liquid separation, glass pump is an indispensable part of the device key components, with a certain pressure of tap water to provide power. The shortcomings of this device is obvious: ① glass water pump and faucet connected to the rubber hose in the open when the big easy to be washed away, the water column radiance; ② glass pump is particularly vulnerable to damage; ③ Once the operation is not easy, ; ④ glass water pump power by the pressure