And a method for manufacturing the tube wall temperature measurement for thermocouple device

摘要

PROBLEM TO BE SOLVED: To simply attain a thermocouple not projecting from the surface of a pipe and enable a highly accurate measurement of temperature of a pipe wall by providing a groove on the outer circumference of a pipe that is provided with a curved surface equivalent to the outer diameter of the thermocouple. ;SOLUTION: A V-shaped groove having a curved surface equivalent to the outer diameter of a single core thermocouple 6 is cut on the outer circumference of a pipe 7, and the thermal contact position 5 of the thermocouple 6 is set on the outer circumference position of the pipe 7 to be measured for temperature, and the thermocouple 6 is buried therein. Next, the thermocouple 6 is pressed down by covers 9a and 9b having a sectional V shape of which surface is formed curved equivalent to the outer diameter of the thermocouple 6, and they are adhered tightly to the pipe 7 for protection. The V-shaped covers 9a and 9b are halved respectively, and a welded part 10 to the pipe 7 is formed by using the same material as the pipe 7. The thermocouple 6 is led out to the non-heating side of the pipe 7 and is connected with a thick thermocouple 11 for measurement. Since the covers 9a and 9b are made of the same material as the pipe 7, stress generated due to thermal expansion is small in the soldered part 10, and crack is hardly generated.;COPYRIGHT: (C)2000,JPO