A Method of Regularly Compensating for Oxidation of Thermocouples
A thermocouple, regular technology, applied in the direction of thermometers that use directly heat-sensitive electric/magnetic elements, measuring heat, using electric devices, etc., can solve problems such as distortion of display values, improve service life, optimize heating power, Improve the effect of display accuracy
Active Publication Date: 2018-11-23
成都中光电科技有限公司 +1
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Problems solved by technology
[0003] The purpose of the present invention is to solve the technical problem of display value distortion of thermocouples in the prior art under high temperature conditions and long-term operation, and the present invention discloses a method for regularly compensating for the oxidation of thermocouples
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[0015] The present invention will be described in detail below in conjunction with specific embodiments.
[0016] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0017] The invention discloses a method for periodically compensating for the oxidation of thermocouples, which specifically includes the following steps: step 1, welding a first thermocouple on the outer wall of the platinum channel at the position of the mixing barrel, the first thermocouple It is used to detect the temperature of the platinum wall of the platinum channel, and then obtain the temperature of the molten glass flowing through the platinum channel; an opening is set on the outer wall in front of the posi...
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The invention relates to the platinum channel technology and discloses a method for regularly compensating oxidation of a thermocouple. The method specifically comprises steps that 1, a first thermocouple is welded on an outer wall of a stirring barrel of a platinum channel, the thermocouple is used for detecting temperature of a platinum wall of the platinum channel, and temperature of glass liquid flowing through the platinum channel is further acquired; an opening hole is arranged on a front outer wall of the stirring barrel of the platinum channel, the opening hole is used for disposing a second thermocouple, and the second thermocouple is used for detecting temperature of air at the opening hole; 2, when a discharge quantity in a first stable state occurs, a reading value T*SC of the first thermocouple in the first stable state, a reading value TCC* of the second thermocouple, the discharge quantity Q* and direct stirring barrel heating power P*SC are recorded; and 3, an estimate of the first thermocouple is calculated according to a thermal capacitance formula. The method is advantaged in that the temperature of the platinum channel can be accurately monitored.
Description
technical field [0001] The invention relates to thermocouple technology, in particular to a method for regularly compensating for the oxidation of thermocouples. Background technique [0002] In the production process of TFT-LCD liquid crystal substrate glass, the platinum channel is inseparable. The purpose of heating the glass is achieved by directly electrifying the platinum channel. A platinum-rhodium alloy thermocouple is spot-welded on the outer wall of the platinum channel. The thermocouple is used It is used to monitor the glass temperature and adjust the heating power accordingly, so as to achieve controllable glass temperature and produce high-quality substrate glass. Because the temperature of the platinum channel, especially the clarification section, is very high, reaching above 1600 degrees, the platinum-rhodium thermocouple will age when it is operated at high temperature for a long time, that is, rhodium evaporates faster than platinum, and the evaporated rho...
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IPC IPC(8): G01K7/10
CPCG01K7/10
Inventor 彭寿谢军王国全张利军
Owner 成都中光电科技有限公司