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装置气密性检查的几种方法

发布时间:2017-05-26 16:17:35   发布人:http://xacrystaledu.com
化学是一门以实验为主的科学,在化学实验的过程中,凡涉及气体制备、收集和气体反应的仪器装置,都要进行气密性的检验这一操作。气密性检验一般应在仪器连接完之后,添加药品之前进行。气密性检查的方法虽然多种多样,但总的原则是:堵死一头采取一定的措施,使之产生一定的压强差,出现对应的现象,再分析现象得出结论,从而判断仪器装置的气密性是否良好。但由于不同实验仪器装置的差异,检验所采用的操作与方法也有所区别。
Chemistry is an experiment based science. In the process of chemical experiment, all the instruments and devices involved in gas preparation, collection and gas reaction should be checked by air tightness. The tightness test shall be carried out prior to the completion of the instrument connection and before the addition of the medicine. Methods the air tightness testing although varied, but the general principle is: blocked a head to take certain measures to generate a certain pressure difference, corresponding phenomenon, then analysis of the phenomenon of conclusion, in order to determine whether the good air tightness device. However, due to the differences of different experimental instruments and devices, the methods and methods used in the test are also different.


1、微热法。
1, micro heat method.
其操作程序:将导气管末端插入水中――用手握住或利用热毛巾捂容器对该仪器装置微热——观察导管末端是否有气泡逸出——松开手后—-观察导管末端是否形成一段水柱 ,若是,则气密性好。如图一、二装置气密性的检查。
The operation process: the tail end of the air duct into the water -- hold on the instrument or device micro - catheter. Whether the end bubble -- after releasing the hand - whether the formation of a distal end of the catheter to observe water column, use hot towel if the container is good air tightness. Check the tightness of the device as shown in figure one or two.
2、直接加热法。
2 direct heating method.
当装置构成的密封体系较大时,用手捂或热毛巾捂不易引起空气体积的变化时,采用酒精灯直接对装置加热,若观察到导管末端有气泡逸出——松开手或移走热源后—-导管末端形成一段水柱 ,则装置的气密性好。
When the device is composed of a sealing system is large, with hands or hot towel is not easy to cause the change of air volume, the use of alcohol lamp heating device directly to the distal end of the catheter is observed, if the bubble, loosen the hand or removed after the heat source - tube end forming a water column, then the air tightness device.
3、液差法。
3, liquid difference method.
操作程序:关闭导气管上的活塞――往体系即球形漏斗中注入水——使漏斗中的水面高于容器中的水面――静置片刻水面位置不变即形成稳定的液差,说明装置的气密性良好。如图四装置气密性的检查。
Operation procedure: close the guide piston, on the system to tracheal hp-l funnel of injected water to the water in the hopper above the water in the container, put it aside for a moment the water that formed a stable liquid position difference, that the good air tightness device. Check the tightness of the device as shown in figure four.
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