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Thermocouple, temperature monitoring equipment and brazing flame temperature real-time monitoring method

A technology for thermocouples and monitoring equipment, which is applied in the field of thermocouples, temperature monitoring equipment and brazing flame temperature real-time monitoring, which can solve problems such as virtual welding, inability of operators to accurately control flame temperature, poor thermal conductivity, etc.

Pending Publication Date: 2022-07-29
GREE ELECTRICAL APPLIANCE SHIJIAZHUANG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although robot automatic brazing can control the flame temperature by controlling the gas source parameters, etc., due to the lack of effective temperature monitoring means, the temperature in the welding process cannot be quantified, and the operator cannot accurately control the flame temperature, so welding overheating will occur , virtual welding, etc., resulting in unqualified quality of welded products
[0003] In order to overcome this defect, some enterprises use thermocouples to monitor the temperature of the brazing flame. However, the current thermocouples have the defects of easy wear at high temperature, poor thermal conductivity, and poor impact resistance, which cannot meet the requirements of the brazing flame temperature monitoring on the market. requirements

Method used

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  • Thermocouple, temperature monitoring equipment and brazing flame temperature real-time monitoring method
  • Thermocouple, temperature monitoring equipment and brazing flame temperature real-time monitoring method
  • Thermocouple, temperature monitoring equipment and brazing flame temperature real-time monitoring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like figure 1 As shown, a thermocouple includes: a temperature sensing body 1 and a protective cover arranged outside the temperature sensing body 1, the protective cover includes a protective substrate 2, a high-aluminum protective sleeve 3 and a nickel-aluminum ion modification Layer 4, the protective substrate 2 is arranged on the outer wall of the temperature sensing body 1, the high-aluminum protective cover is arranged on the outer wall of the protective substrate 2, and the nickel-aluminum ion modified layer 4 is arranged on the high-alumina Protect the outer wall of the sleeve 3 .

[0034] The protective substrate 2 plays a main protective role, and the high-aluminum protective sleeve 3 plays an auxiliary protective role. In this embodiment, the protective substrate 2 includes a magnesium oxide filling layer 21, and a graphite protective sleeve 22 is arranged in the magnesium oxide filling layer 21. The structure of the protective substrate 2 from the inside to...

Embodiment 2

[0052] This embodiment only describes the difference from Embodiment 1, and other technical features are the same as the above-mentioned embodiment. In this embodiment, the temperature sensing body 1 includes a positive electrode and a negative electrode, and the weight percentage of the material of the positive electrode is: 94.84% tungsten, 5% rhenium, 0.04% Si, 0.04% Al, 0.08% Cobalt; the weight percentage of the negative electrode material is: 73.84% tungsten, 26% rhenium, 0.04% Si, 0.04% Al, 0.08% cobalt.

[0053] In this embodiment, the tungsten content of the tungsten-rhenium-cobalt temperature sensor is relatively high, the cobalt content is relatively low, and the temperature offset of the temperature sensor is relatively small.

Embodiment 3

[0055] This embodiment only describes the difference from Embodiment 1, and other technical features are the same as the above-mentioned embodiment. The temperature sensing body 1 includes a positive electrode and a negative electrode, and the weight percentage of the material of the positive electrode is: 94.97% tungsten, 5% rhenium, 0.01% Si, 0.01% Al, 0.01% cobalt; the material of the negative electrode The weight percentages are: 73.97% tungsten, 26% rhenium, 0.01% Si, 0.01% Al, 0.01% cobalt.

[0056] In this embodiment, the tungsten-rhenium-cobalt temperature sensor has high tungsten content and low cobalt content, and the mechanical properties of the temperature sensor are poorer than those of Example 1-2.

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Abstract

The invention provides a thermocouple, temperature monitoring equipment and a brazing flame temperature real-time monitoring method, and belongs to the technical field of temperature monitoring, the thermocouple comprises a temperature sensing main body and a protective sleeve arranged outside the temperature sensing main body, the protective sleeve comprises a protective base material, a high-aluminum protective sleeve and a nickel-aluminum ion modified layer, the protection base material is arranged on the outer wall of the temperature sensing body, the high-aluminum protection sleeve is arranged on the outer wall of the protection base material, and the nickel-aluminum ion modification layer is arranged on the outer wall of the high-aluminum protection sleeve. The thermocouple has excellent corrosion resistance, impact resistance and thermal shock resistance, and can effectively transmit temperature signals. The temperature monitoring device is wide in temperature measurement range, high temperature is isolated through the thermal insulation box body, flame temperature monitoring can be achieved, electronic components can be well protected, and it is guaranteed that the device can work safely and stably.

Description

technical field [0001] The invention relates to the technical field of temperature monitoring, in particular to a thermocouple, temperature monitoring equipment and a real-time monitoring method for brazing flame temperature. Background technique [0002] In the production process of air conditioner heat exchangers, copper pipes need to be connected to each other by flame brazing. The temperature of the flame during the brazing process will directly affect the quality of the brazing. In order to improve the production efficiency of heat exchangers and reduce production costs, copper tube welding is usually carried out by automatic brazing of robots on the market. Robot automatic brazing can control the flame temperature by controlling the parameters of the gas source, etc. However, due to the lack of effective temperature monitoring methods, the temperature of the welding process cannot be quantified, and the operator cannot accurately control the flame temperature, so ther...

Claims

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Application Information

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IPC IPC(8): G01K7/02G01K1/08G01K1/10
CPCG01K7/02G01K1/08G01K1/10
Inventor 黄启陈晓飞冯韶楠敦美林高建雷孙刚
Owner GREE ELECTRICAL APPLIANCE SHIJIAZHUANG
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