Novel infrared tube type heating furnace sample pipe applied to thermal desorption experiment

Abstract

The invention discloses a novel infrared tube type heating furnace sample pipe applied to a thermal desorption experiment. The novel infrared tube type heating furnace sample pipe comprises a quartz tube, wherein an upper vacuum flange plate sleeves the inner side of an opening part of the quartz tube; a lower vacuum flange connector with a step is arranged at the outer side of the opening part ofthe quartz tube; plate faces of the upper vacuum flange plate and a lower vacuum flange plate are opposite and are fixedly connected through a bolt; a lower rubber gasket is clamped between the opening part of the quartz tube and the lower vacuum flange plate. The novel infrared tube type heating furnace sample pipe provided by the invention has good sealing performance and high vacuum degree (which is higher than 10<-5>Pa commonly) can be wholly obtained through a system; the novel infrared tube type heating furnace sample pipe can bear relatively high temperature within short time and is simple and rapid to detach, and the quartz tube is easy to replace after being consumed; the novel infrared tube type heating furnace sample pipe is low in construction price and has good economical efficiency.

Description

Technical field: [0001] The invention relates to a gas thermal desorption device used in various vacuum states or a sample heat treatment device under a protective atmosphere, and mainly relates to a new infrared tube heating furnace sample tube used in a thermal desorption experiment. Background technique: [0002] In industrial production and scientific experiments, it is often necessary to rapidly and controllably heat materials or samples to a higher temperature, perform corresponding heat treatment on the materials, or use high temperature to desorb the gas adsorbed in the materials (thermal desorption, Thermal Desorption) ). During the heat treatment process, it is often necessary to pass a protective gas (such as an inert gas) into the sample tube to prevent the oxidation of the sample; and when the material is thermally desorbed, it is generally necessary to keep the sample under vacuum conditions. [0003] Infrared tube heating furnace has fast heating speed (sever...

AI Technical Summary

Problems solved by technology

[0004] However, the valve pipes of ordinary vacuum systems or gas charging systems are generally made of stainless steel. Quartz glass and stainless steel have different thermal expansion coefficients. Direct connection may cause the quartz tube to burst during use.

In order to connect the quartz glass device to the vacuum system or the gas filling system, the valveable alloy is currently used in the world to weld the quartz tube and the stainless steel tube first, and then connect the welded stainless steel tube to the vacuum flange. This method is costly

Moreover, the quartz tube cannot be replaced after welding, and the fragile quartz tube can only be discarded as a whole with the stainless steel connector after being broken, which is less economical

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