Vacuum pump instrument structure and working principle

A ray generated by a ray tube is generally used to excite the surface of the sample. The secondary ray generated after the sample absorbs the primary ray is used as the qualitative and quantitative analysis of the sample. In order to improve the accuracy and accuracy of the analysis, the sample analysis is generally performed in a vacuum environment. get on. The structure and working principle of the instrument: The vacuum pump is a key device that extracts the specific device needed from the atmospheric state to the vacuum state. The ray fluorescence spectrometer uses a vacuum pump to pump the sample chamber and related pipes from the atmospheric state to the vacuum state. When analyzing the sample, the sample chamber is first pumped from the atmospheric state to a vacuum state. When the vacuum in the sample chamber is extracted, the fluorescence spectrometer opens the shutter of the dichroic chamber, and the vacuum pump continues to extract the light chamber and the sample chamber as the dichroic chamber and When the vacuum level of the sample chamber reaches the set vacuum value, the fluorescence spectrometer starts to integrate the signal, and then calculates the intensity and content. The performance of the vacuum pump is directly related to the speed and accuracy of the sample analysis. If the vacuum is not good, the sample cannot be analyzed. Therefore, the vacuum pump must be maintained. Considering that the sample is analyzed, the dust is sucked into the vacuum pump solenoid valve and other components. The instrument part, but the dust mainly sucks into the vacuum pump, and the vacuum pump should periodically change the vacuum pump oil. The shutter is a brass disc that separates the split chamber from the sample chamber. The shutter is open during the analysis. The rest of the time the shutter is closed. The shutter is always open and closed during the analysis. If the shutter is not closed, the split chamber If the vacuum cannot reach below, the instrument will alarm and there will be a ring on the shutter. If the ring is aged, it will cause the tight separation of the light-separation chamber, and the vacuum in the dichroic chamber will not be drawn below. Because the light pipe continuously irradiates the ring on the shutter, as time goes by, the ring will age and cause cracks, resulting in lax seals and affecting the vacuum in the dichroic chamber. Therefore, the ring must be periodically replaced. Solenoid valve ray fluorescence spectrometer Four solenoid valves in the vacuum system are very important for the normal operation of the vacuum system. They are the sample room valve dichroic chamber valve and the sample chamber bleed valve and power outage bleed valve. The complete working process is to first draw the pipeline vacuum, then pump the vacuum in the sample chamber, and then pump the vacuum in the sample chamber, then pump the vacuum in the sample chamber and the vacuum chamber. Finally, the sample chamber is vacuum vented and returned to the atmosphere.

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