JPH02110328A - Thermocouple - Google Patents

Abstract

PURPOSE:To facilitate the connection between a lead wire and a thermocouple wire without using a metal of a different kind by a method wherein the lead wire of which the fore end is melted and the opposite sides are machined to be flat is connected integrally with the thermocouple of which the opposite sides of the fore end are machined to be flat. CONSTITUTION:After the coat on the fore end of a lead wire 2 is removed, the fore end is melted to be in one body and then the opposite sides thereof are machined to be flat, while the opposite sides of the fore end of a wire of a thermocouple are machined to be flat. The two parts thus machined are welded together integrally and connected by spot welding or the like. Thereby the lead wire 2 and the thermocouple wire 1 can be connected together in the simplest and reliable manner without using a substance of a different kind, such as a metal of a different kind, for a part of connection and an operation for connection is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermocouple in which the connecting portions of the thermocouple wires are connected so as to be integral with each other to ensure accurate temperature measurement.

Conventionally, the method for connecting thermocouples and lead wires (mainly twisted wires) is 1. Silver soldering using silver soldering is the law.
2. The caulking method, in which pipes are caulked together, has been implemented, but since all of these conventional methods use dissimilar metals for the connection parts, if a temperature gradient occurs at the connection part, heat may be generated in this part. This generates electric power and causes errors that interfere with temperature measurement.

The present invention eliminates defects on the glaze and maintains an accurate temperature of 81℃.
Conventionally, this method connects both wires as one body without using dissimilar metals.

In other words, after removing the coating from the tip of a lead wire (mainly stranded wire), the tip is melted and made into a single piece, and both sides of it are made flat, and the tip of a thermocouple (mainly a sheathed wire) is made flat on both sides. These are welded together using spot welding or the like to connect them as one body.

The method of connecting thermocouple wires according to the present invention is the method that connects both the lead wire and the thermocouple wire most easily and reliably without using different materials such as different metals in the connection part, and the connection work is easy. Not only that, but the connected portion does not swell, making it easy to cover tubes, etc., and it has many advantages, such as good insulation.

[Brief explanation of the drawing]

The drawings are Fig. 1 1.2, Fig. 2 1, 2 shows an example of a conventional method, Fig. 3 1, 2 . shows an example according to the present invention. Figure 1-1 shows the conventional "silver brazing" method. Figure 1-2 shows the "aJ cut" section view in Figure 1-1. Figure 2-1 shows the conventional "caulking method". Method Figure 2-2 is a cross-sectional view of rbJ in Figure 2-1. Figure 3-1 is an embodiment according to the present invention. Figure 3-2 is a cross-sectional view of "C" in Figure 3-1. ...
Thermocouple wire 2 ... Lead wire 3 ... Silver solder 4 ... Pipe

Claims (1)

[Claims] Melt the tip of the lead wire (mainly stranded wire) Afterwards, the two sides are flattened and heated. Both ends of the wire of an electrocouple (mainly sheath type) As the same body as the one whose surface has been processed to be flat. A thermocouple characterized in that it is connected.