Multistage variable-diameter infrared temperature measuring device used for induction melting and temperature measurement method thereof

Abstract

The invention discloses an infrared temperature measuring device used for vacuum induction melting and a temperature measurement method thereof. The device comprises an infrared temperature measurement probe, a window, a multistage temperature measurement pipe and a fixing device. The infrared temperature measurement probe generates infrared light used for temperature measurement. The window is used for maintaining vacuum sealing and the infrared light passes through the window. The infrared light passes through the multistage temperature measurement pipe, focuses and forms a light spot irradiated to an object whose temperature is about to be measured. During a temperature measurement process, generated smoke and dust and / or steam are deposited and / or discharged. The multistage temperature measurement pipe comprises a multistage structure. At least one stage of the multistage structure comprises a wide diameter portion located on one end and a small hole located on the other end. The fixing device is used for fixing the infrared temperature measuring device so that the light spot formed by the infrared light used for temperature measurement is irradiated to the object whose temperature is about to be measured. The device is different from a traditional hand-held infrared temperature measuring device. A fixed and multistage structure connection mode is adopted so that the dust and the steam are deposited on an inner wall of the temperature measurement pipe during a rising process and are prevented from sticking to a glass window of a temperature measurement port. And real-time, continuous and accurate temperature measurement can be realized.

Description

technical field [0001] The invention belongs to the technical field of casting equipment, and in particular relates to a multi-stage variable-diameter infrared temperature measuring device and a temperature measuring method for induction melting. Background technique [0002] Vacuum induction melting technology has been widely used in the production of special alloy materials such as nickel-based superalloys, titanium alloys, stainless steel, and ultra-high-strength steel due to its high efficiency, low energy consumption, and strong electromagnetic stirring effect that is beneficial to eliminate component segregation. . In the vacuum induction melting process, the alloy liquid is usually refined under the conditions of high temperature, high vacuum and high stirring, and the appropriate pouring temperature must be controlled. Therefore, realizing accurate measurement of alloy melt temperature plays a key role in achieving high purity and high accuracy of final alloy compon...

AI Technical Summary

Problems solved by technology

However, the traditional hand-held infrared thermometer is not suitable for vacuum induction melting. The main problems are: first, the temperature measurement point of the hand-held infrared thermometer is artificially controlled, and the temperature measurement point is unstable, resulting in errors secondly, continuous measurement cannot be realized due to the need for hand-held infrared thermometers; finally, infrared temperature measurement is easily affected by the surrounding environment, while vacuum induction melting melts alloys under high temperature and high vacuum conditions, and the alloy melt Gasification, volatilization, and flue gas produced by the working medium at high temperature will cause a large amount of dust and flue gas near the melting crucible. These substances are usually easy to attach to the glass window of the infrared thermometer temperature measurement port, thus affecting the temperature measurement. The accuracy of the temperature has a great influence on the

At present, some infrared thermometers eliminate the influence of flue gas by purging, but this method is also not suitable for vacuum induction melting. Firstly, the effect of purging is not stable, and secondly, the gas purged will inevitably affect the alloy to be measured. The surface temperature of the melt is affected, resulting in a drop in temperature and inaccurate temperature measurement

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