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  • 氢空一体机漏气检测及原因分析
  • 本站编辑:上孰机电设备(上海)有限公司发布日期:2018-05-08 17:29 浏览次数:

氮氢空一体机关于漏气检测及原因分析

Leakage detection and cause analysis of nitrogen hydrogen air integrated machine

1、漏气的诊断:

1. Diagnosis of air leakage:

氮氢空一体机气体的流量显示(氢气和氮气由LED数码管指示)大大超过气体的实际用量,漏气量较大时,流量接近发生器的额定流量,氮氢空一体机而气体输出压力不能达到额定值(一般为0.4Mpa)。此时基本可以认定是漏气。

The flow rate of gas in a nitrogen and hydrogen air unit (hydrogen and nitrogen is indicated by the LED digital tube) is much more than the actual amount of gas. When the gas leakage is large, the flow rate is close to the rated flow rate of the generator, and the gas output pressure can not reach the rated value (generally 0.4Mpa). At this point, it can be basically identified as leakage.

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2、漏气的原因

2. The cause of air leakage

有时是因为氮氢空一体机内部漏气,如:更换干燥剂后未将干燥管拧紧,或干燥管密封圈年久失效等;多数情况下是由于气相色谱仪本身或气源与色谱仪之间的连接气路泄露造成的,如塑料管道老化,接头连接不当,进样垫未更换(造成氮气泄露,柱前压低);汽化室喷嘴漏气(造成氢气漏气)。空气的少量泄漏不影响使用,氮氢空一体机量漏气时会听到丝丝的漏气声,严重时空气输出压力达不到额定压力(约0.4-0.42Mpa),此时氮气压力也达不到额定压力,氮气流量显示也低于额定流量(300Ml/min)。

Sometimes it is because of the internal leakage of the nitrogen hydrogen air unit, such as the replacement of drying agent after the replacement of the drier, or the failure of the dry pipe seal ring for a long time. In most cases, the gas chromatograph itself or the gas source and the chromatograph are leaked, such as the aging of the plastic pipes, the improper connection of the joints, and the failure of the sample pad. Replacement (causing nitrogen leakage, pre column depression); vaporization chamber nozzle leakage (causing hydrogen leakage). A small amount of air leakage does not affect the use of the air, nitrogen hydrogen air unit will hear the leakage of silk when the amount of air leakage, the severe gas output pressure is not up to the rated pressure (about 0.4-0.42Mpa), at this time the nitrogen pressure can not reach the rated pressure, nitrogen flow rate is also lower than the rated flow rate (300Ml/min).

3、漏气的检查方法

3. Inspection method of air leakage

氮氢空一体机在漏气量小时(100Ml/min以下)可用皂沫检查接头,而在大流量泄漏时,用分段法排查比较有效。方法是:先拆下与发生器出口相连接的管道,用本公司提供的原配堵头堵住发生器出口,观察气体压力能否恢复正常,氮气或氢气流量能否回到“000”,如上述两项正常,则说明发生器没有泄漏,氮氢空一体机需检查气相色谱汽化室进样垫、燃烧室喷嘴、或连接气源与气相色谱的管路。如堵住出口后,压力和流量仍不正常,则要检查气体发生器内部,氮氢空一体机主要观察干燥管是否有破损,开裂,密封垫是否老化,密封处是否有硅胶颗粒等。

The nitrogen and hydrogen air compressor can be used to check the joints when the air leakage is less than 100Ml/min (below). The method is: first remove the pipe which is connected with the outlet of the generator, and plug the generator outlet with the original plugging head provided by the company, observe whether the gas pressure can be restored to normal, whether the flow of nitrogen or hydrogen can return to "000", if the above two items are normal, it shows that the generator has no leakage and the nitrogen hydrogen air integral machine needs to check gas chromatography. A vaporizing chamber inlet pad, a combustion chamber nozzle, or a pipeline connected with gas source and gas chromatograph. If the outlet is blocked, the pressure and flow are still not normal, then the gas generator is checked. The nitrogen and hydrogen air machine is mainly used to observe whether the drying pipe is damaged, cracking, the sealing pad is aging, and whether there is silica gel particles in the seal.