Light source stabilizing device for sulfur dioxide analyzer

Abstract

The invention discloses a light source stabilizing device for a sulfur dioxide analyzer, and relates to the technical field of analytical instruments. The light source stabilizing device comprises a lamp barrel, wherein the lamp barrel is used for placing a zinc lamp, the upper end of the zinc lamp is fixed and hermetically connected with the lamp barrel through a lamp cover, the lower end of thezinc lamp is fixed and hermetically connected with the lamp barrel through a lamp cap, a lamp holder is arranged on one side of the lamp barrel, a lamp clamp is arranged on the other side of the lampbarrel, the lamp holder is detachably connected with the lamp clamp, the lamp holder and the lamp clamp are used for fixing the lamp barrel, and a temperature control mechanism is arranged on the lampbarrel and used for achieving temperature control and heat dissipation of the zinc lamp. The two ends are fixed, so that the zinc lamp is safer and more stable to install, the phenomenon of unstablelight source intensity caused by infirm fixation of the zinc lamp is avoided, and the light source stability is improved. The upper end and the lower end of the zinc lamp are in sealed connection, interference of external light is avoided, meanwhile, the zinc lamp can be effectively protected, and the zinc lamp is prevented from being broken by external impact due to partial exposure. The zinc lamp is subjected to temperature control and heat dissipation through the temperature control mechanism, and the problem of light source intensity floating caused by temperature drift is avoided.

Description

technical field [0001] The invention relates to the technical field of analytical instruments, in particular to a stable light source device for a sulfur dioxide analyzer. Background technique [0002] The principle of the sulfur dioxide analyzer is that when the zinc lamp is working, it emits ultraviolet light, which is filtered into 214nm monochromatic light by the filter, and then enters the sulfur dioxide reaction chamber through the lens focus. Sulfur dioxide in the sample gas absorbs ultraviolet light to generate energy level transitions. From the ground state to the excited state, when the excited state molecule returns to the ground state, it emits fluorescence with a center wavelength of 330nm. The concentration of sulfur dioxide can be determined by detecting the intensity of the fluorescence with a photomultiplier tube. [0003] In the prior art, only one end of the zinc lamp is fixed, and the other end may shake under the influence of vibration or other external...

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Problems solved by technology

[0003] In the prior art, only one end of the zinc lamp is fixed, and the other end may shake under the influence of vibration or other external forces, resulting in unstable light source intensity; the prior art uses zinc lamp clips and foam to fix the zinc lamp on the zinc lamp. On the lamp holder, the glass tube of the zinc lamp will be partially exposed, so that external light will enter the zinc lamp tube, causing external interference of the light source, and at the same time, the exposed part of the glass tube of the zinc lamp is easily broken under external impact

In addition, the zinc lamp in the prior art has no temperature control, which will cause the intensity of the light source emitted by the zinc lamp to change due to its own temperature during operation, resulting in the uncontrollable drift of the sulfur dioxide analyzer due to the influence of the working temperature of the zinc lamp

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