Connecting shell type solidification temperature measuring device

A temperature measuring device and shell-type technology, applied in the field of temperature measurement, can solve the problems of high cost, long thermal response time, inability to realize complex layout and continuous temperature measurement, and achieve the effect of flexible loading and unloading and low process requirements

Inactive Publication Date: 2020-06-26
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing tools for direct temperature measurement of molten steel used in industry are: disposable tungsten-rhenium quick couple and ceramic sheath insulated armored thermocouple (couple wire is tungsten-rhenium or platinum-rhodium); these two temperature measurement methods are used in scientific research temperature measurement There are defects in both, the former cannot achieve complex layout and continuous temperature measurement, the latter has too long thermal response time, and the huge thermal inertia brought by the ultra-low thermal conductivity of the ceramic sheath makes it basically unsuitable for solidification transient temperature measurement
The existing high-temperature thermocouples on the market are basically armored insulated thermocouples made of tungsten-rhenium and platinum-rhodium thermocouple elements, which have excellent steady-state measurement performance (the transient performance is poor when the sheath diameter is large) and It is durable, and at the same time, it is expensive due to the special materials of the temperature-resistant sheath and the temperature-resistant insulating layer and the high requirements of the manufacturing process, which makes it expensive for one-time use in high-temperature liquid solidification temperature measurement

Method used

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  • Connecting shell type solidification temperature measuring device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 1 As shown, a shell-type solidification temperature measuring device includes an outer sheath extending into the sensing area, and a shell-type temperature measuring component housed in the outer sheath to sense the temperature in the sensing area ,Also includes:

[0049] The elastic component is press-fitted with the shell-type temperature measuring component and exerts a downward axial thrust on the shell-type temperature measuring component, so that the bottom end of the shell-type temperature measuring component is in contact with the bottom inner wall of the outer sheath;

[0050] Metal tin 5, when the temperature is measured, changes from a solid phase to a liquid phase, and then fills the inner wall of the bottom end of the outer sheath and submerges the bottom end of the shell-type temperature measurement component.

[0051] The concept of the present invention is: when measuring at 1000°C and above and in the field of solidification temperature ...

Embodiment 2

[0057] Such as figure 1 As shown, on the basis of the above embodiments, preferably, the present invention obtains a response sensitivity compatible with the cooling rate during the solidification process by adjusting the thickness of the sheath and the state of the gap between the sheaths.

[0058] The shell-type temperature measurement assembly includes:

[0059] a tungsten-rhenium wire 2 housed in the outer sheath to sense the temperature in said sensing region,

[0060] Cylindrical ceramic beads 3 are accommodated in the outer sheath, tungsten-rhenium wires 2 run through the cylindrical ceramic beads 3,

[0061] The elastic component is pressed against the cylindrical ceramic bead 3;

[0062] The bottom end of the outer sheath is configured as a spherical shell structure, and the temperature measuring node at the bottom end of the tungsten-rhenium wire 2 is in contact with the inner wall of the bottom end of the outer sheath;

[0063] The bottom end of the tungsten-rhen...

Embodiment 3

[0070] Such as figure 1 As shown, on the basis of the above embodiments, preferably, since the tungsten-rhenium thermocouple is used as the sensing element, the tungsten-rhenium thermocouple can be used for high-temperature measurement, and can be used for high-temperature liquid after selecting a sheath suitable for the use environment The internal solidification temperature is measured, but after the temperature measurement is completed, it is embedded in the solidified liquid and cannot be taken out, making the tungsten-rhenium thermocouple unable to be reused. The particularity of the material of the tungsten-rhenium thermocouple and the high requirements of the manufacturing process make it expensive for one-time use in high-temperature liquid solidification temperature measurement. The present invention adopts a detachable double sheath structure, so that only the outer sheath remains in the solidification medium after the solidification temperature measurement is comple...

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Abstract

The invention discloses a connecting shell type solidification temperature measuring device. The device comprises an outer sheath extending into a sensing area. A shell-connecting type temperature measuring assembly is accommodated in the outer sheath to sense the temperature in the sensing area, and is characterized by further comprising an elastic assembly which is matched with the shell-connecting type temperature measuring assembly in a jacking manner and applies downward axial thrust to the shell-connecting type temperature measuring assembly, so that the bottom end of the shell-connecting type temperature measuring assembly is in contact with the inner wall of the bottom end of the outer-layer sheath; and the metallic tin (5) is converted into a liquid phase from a solid phase duringtemperature measurement, then is filled in the inner wall of the bottom end of the outer sheath and submerges the bottom end of the shell type temperature measurement assembly.

Description

technical field [0001] The invention relates to temperature measurement technology, in particular to a shell-connected solidification temperature measurement device. Background technique [0002] In the scientific research on the solidification process of high-melting liquid metals, the temperature change inside the liquid metal is the most important parameter information. For example, in the solidification experiments developed by different alloy steels, it is necessary to know the migration speed of the solidification front during the solidification process by measuring the internal temperature of the molten steel. , liquidus and solidus temperatures, etc. This kind of solidification transient temperature measurement puts forward high requirements on the sensor's temperature measurement accuracy, thermal response time, and high temperature resistance. [0003] Nowadays, non-contact temperature sensors are mostly used in the field of high-temperature temperature measurement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/02G01K1/12G01K1/16G01N25/06
CPCG01K7/02G01K1/125G01K1/16G01N25/06
Inventor 杨生兴宫厚军曾小康昝元锋李勇李朋洲
Owner NUCLEAR POWER INSTITUTE OF CHINA
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