A device for measuring the inner wall temperature of parallel electric heating pipes

Abstract

The invention discloses a device for measuring the temperature of the inner walls of electrified heating pipes connected in parallel. The device for measuring the temperature of the inner walls of the electrified heating pipes connected in parallel comprises metal pipes stretching into the heating pipes to be measured, wherein the end, stretching into the corresponding heating pipe to be measured, of each metal pipe is divided into multiple equal sections, so that a temperature measuring probe is formed, multiple thermocouple wires are welded to the temperature measuring probes in the metal pipes, a circumferential stepping motor which drives the metal pipes and the temperature measuring probes to rotate in the inner circumferential direction of the heating pipes to be measured is connected to the outer ends of the metal pipes through gear transmission pieces, the circumferential stepping motor rotates synchronously through the gear transmission pieces so that the temperature of the inner walls of the heating pipes can be measured, the circumferential motor is connected with a guide rail, a lead screw is arranged on the guide rail and is connected with an axial stepping motor through a gear transmission piece, the guide rail drives the circumferential stepping motor, the metal pipes and the temperature measuring probes to move axially along the heating pipes to be measured under the driving of the axial stepping motor. According to the device for measuring the temperature of the inner walls of the electrified heating pipes connected in parallel, the temperature of the portions at any angles and any axial positions of the inner walls of the electrified heating pipes can be measured; the device has the advantages that the structure is simple, operation is convenient and the performance is reliable.

Description

technical field [0001] The invention relates to the technical field of measuring the wall temperature of electric heating pipes, in particular to a device for measuring the inner wall temperature of parallel electric heating pipes. Background technique [0002] The measurement of the wall temperature of the electric heating pipe is a very important aspect in the thermal test, and the accuracy of the measurement directly affects the accuracy and reliability of the thermal test. Usually, the temperature of the outer wall of the electric heating tube is measured by discharge welding. One pole of the charging capacitor is connected to the thermocouple wire, and the other pole is connected to the heating tube. Welded on the outer wall of the heating tube. However, for the measurement of the inner wall temperature of the heating tube, this method has great limitations. First, the inner space of the heating tube is limited, and it is difficult to weld the thermocouple wire on the...

AI Technical Summary

Problems solved by technology

However, for the measurement of the inner wall temperature of the heating tube, this method has great limitations

First, the inner space of the heating tube is limited, and it is difficult to weld the thermocouple wire on the inner surface, especially when the inner diameter of the heating tube is very small, this method is not operable; secondly, even for a larger size heating tube, direct welding This method not only cannot guarantee the firmness of the solder joints, but also is prone to fluctuations in the measured value when the pipe wall is supplied with alternating current, and the measurement accuracy cannot be guaranteed.

Therefore, the existing technical means cannot effectively solve the problem of accurate and reliable measurement of the inner wall temperature of the electric heating tube.

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