High-precision wide-temperature field electric thermo-couple test furnace
A thermocouple, high-precision technology, applied in thermometers, measuring heat, thermometer testing/calibration, etc., can solve problems that cannot be solved well, and achieve short adjustment time, long uniform temperature zone, and small electromagnetic induction interference Effect
Inactive Publication Date: 2009-11-25
上海量值测控仪器科技有限公司
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In a word, existing patents all fail to solve the problem that the present invention is aimed at well
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[0012] The present invention will be further described below in conjunction with the accompanying drawings.
[0013] Such as figure 1 As shown, a high-precision wide temperature field thermocouple verification furnace of the present invention is composed of a main heating furnace tube 1, an auxiliary heating furnace tube 2, a fixed end casing 7, an insulating layer 8 and a verification furnace shell 9.
[0014] Such as figure 2 As shown, the outer side of the main heating furnace tube 1 is provided with axial heating holes 3, which are evenly distributed. A heating hole 4 is opened in the auxiliary heating furnace tube 2, a temperature measuring hole 5 is opened in the inner side of the main heating furnace tube 1, and the working area 6 of the verification furnace is in the middle.
[0015] The main heating furnace tube 1 is externally connected with several auxiliary heating furnace tubes 2 with adjustable spacing to form a double-layer multi-segment heating furnace tube ...
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The invention relates to a high-precision wide-temperature field electric thermo-couple test furnace, which includes: a main heating stove tube, which is characterized in that: axial bottoming hole troughs are equipped in the main heating stove tube, and are evenly distributed on the outer side of the main heating stove tube; the main heating stove tube inner side is also equipped with a thermometer hole trough for three-dimensional multi-point temperature measurement; the main heating stove tube outer liner is connected with assistant heating stove tube with several segments of adjustable space lengths to form a double-layer multistage heating stove tube nested structure, and the assistant heating stove tube is equipped with axial heating holes. Minor-diameter spiral tube type heater strip are rotatedly arranged in the main heating stove tube and the assistant heating stove tube in tube-perforating type. The high-precision wide-temperature field electric thermo-couple test furnace provided by the invention can easily meet the request of national verification procedure, the axial length of uniform temperature section can reach to twice of that in the national verification procedure request, and temperature differences between any two points in the test temperature field is half of that in the national verification procedure request, moreover the constant temperature time is greatly reduced and the electromagnetic induction disturbance is greatly reduced.
Description
technical field [0001] The invention relates to a thermocouple verification furnace, in particular to a precision constant temperature verification furnace. Background technique [0002] In the process of thermocouple verification and temperature value transfer, the uniformity of the temperature field in the central area of the thermocouple high temperature verification furnace is very important, which directly affects the accuracy and reliability of thermocouple verification. According to the requirements of the national metrology verification regulations and the test specifications of the verification furnace, the uniformity of the highest temperature zone measured at 1000 ° C is: the deviation between the center of the highest uniform temperature zone of the verification furnace and the geometric center of the verification furnace along the axial line is not more than 10mm, and within the range of uniform temperature zone length not less than 60mm and radius 14mm, the t...
Claims
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IPC IPC(8): G01K15/00
Inventor 陈式跃杨平张光海范传明
Owner 上海量值测控仪器科技有限公司