An automatic centering fixture for a rod-shaped sample for a spectrometer

Abstract

The invention discloses a rod-shaped sample automatic centering fixture for a spectrometer, which includes a base, an operation block, a clamping device, a bottom plate and a cover plate; A second slot leading to the straight notch; the operation block includes a main body and an operation part, and the main body is provided with a material trough and a second guiding straight notch; the clamping device includes a spring, a first clamp block and a second clamp block, The first clamping block and the second clamping block are respectively provided with a V-shaped clamping part and a cylindrical pin shaft; the V-shaped clamping part on the first clamping block and the V-shaped clamping part on the second clamping block are to be clamped The bars are arranged staggered in the axial direction; the bottom plate or base is provided with a clamping device limit groove; the clamping device is embedded in the clamping device limit groove, and the cylindrical pin of the clamping device is passed through the One guides into the straight notch and the second guides into the straight notch. Thus, the rod-shaped sample automatic centering jig for a spectrometer of the present invention can be automatically centered when clamping the rod-shaped sample.

Description

technical field [0001] The invention relates to the field of fixtures, in particular to an automatic centering fixture for a rod-shaped sample used in a spectrometer. Background technique [0002] The principle of spark direct-reading spectroscopic analysis is to make the sample change from solid to gaseous state under the action of electric spark excitation, and ionization of atoms and ions occurs. Since different elements have different absorption of spectra, the spectrum of electric spark is analyzed. Analysis, qualitative and quantitative analysis of the elements contained in the measured substance can be carried out according to the wavelength and intensity of the spectral line. [0003] Argon gas can make ionization easier, and drive away the oxygen, nitrogen and other gases released by the excitation of the sample, so as to keep the spectral intensity stable. Therefore, when using a spectrometer for testing, it must be carried out in a high-purity argon gas environmen...

AI Technical Summary

Problems solved by technology

When the sample to be tested is excited, the distance and position from the electrode will affect the final measurement result, so when performing quantitative analysis, the sample to be tested should be consistent with the conditions during calibration. However, when the diameter of the rod-shaped sample is smaller than the excitation hole diameter, it is difficult to keep the sample in the center of the excitation hole, it is easy to deviate from the center of the excitation hole, and it is impossible to ensure that the electrode is in a closed pure argon environment

[0005] At present, it is generally used to process smaller rod-shaped samples, such as slicing or hammering flattened, to make it into a sheet-like sample that can cover the excitation hole, so as to avoid the problem that the rod-shaped sample is difficult to center, but Such a process is cumbersome, time-consuming and labor-intensive

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