Linear butt welding thermocouple and measurement amending method

Abstract

A linear butt welding thermocouple and a measurement correction method. The thermocouple is composed of a butt welding couple wire, a couple wire joint, a thin steel pipe, a support block, a fixing bolt, a spring and a wire. Two thin steel pipes are fixed on the support block by fixing bolts, one of the steel pipes is used as a fixed arm, and its position remains unchanged during measurement, and the other steel pipe is used as a movable arm, which can move freely; the fixed arm and the movable arm The upper ends are respectively equipped with coupler joints, and one end of the coupler joints is connected with the wire passing through the thin steel pipe; the two ends of the coupler wires are respectively fixed on the coupler joints by thin screws; Adjust the position of the movable arm to eliminate the measurement error caused by the thermal expansion of the dual wire. There are large heat conduction and radiation errors in directly measuring the flame temperature field with thermocouples, but using the measurement method and computer correction program of the present invention to correct the measurement results of straight-line butt welding thermocouples can minimize the error in the temperature measurement process. error.

Description

technical field [0001] The invention relates to the technical field of flame temperature measurement, and relates to a linear butt welding thermocouple and a measurement correction method for measuring the flame temperature field. The flame temperature field can be accurately measured through the linear butt welding thermocouple and the measurement correction method of the present invention. Background technique [0002] The following problems will be encountered when measuring the flame temperature with a thermocouple: 1) radiation error, because the temperature of the flame is very high, the radiation error of the thermocouple must be corrected. 2) Thermal conduction error, in most temperature measurement occasions, as long as the thermocouple is properly installed, the thermal conduction error can be ignored, but in the flame due to the large temperature gradient, the thermal conduction error can sometimes be as high as 400°C. Therefore, corrections must also be made. Mo...

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Problems solved by technology

[0002] The following problems will be encountered when measuring the flame temperature with a thermocouple: 1) radiation error, because the temperature of the flame is very high, the radiation error of the thermocouple must be corrected

Moreover, as a contact measurement, the thermocouple will interfere with the flame flow field during the temperature measurement process.

3) The thermal expansion of the thermocouple wire becomes longer, which makes the thermocouple wire swing under the action of the air flow, resulting in temperature measurement errors

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