An assembled thermal resistance that is easy to maintain

Abstract

The invention discloses an assembled thermal resistance which is convenient for maintenance, and relates to the technical field of circuit elements. The assembled thermal resistance that is easy to maintain includes a thermal resistance body with lead wires, a maintenance mechanism is fixedly installed on the bottom of the thermal resistance body, and the lead wires in the thermal resistance body run through the maintenance mechanism and extend downwards, the maintenance mechanism A monitoring mechanism is fixedly installed on the left side, and the maintenance mechanism includes a fixed ring, an annular cavity, a feeding pipe, a ball shaft, a first gear, a micro motor, a second gear, a micro electric heating ring, an expansion spiral strip and an electromagnetic one-way valve. This easy-to-maintain assembled thermal resistance detects the temperature of the thermal resistance working environment in real time through the monitoring mechanism, and records when the working environment temperature reaches the temperature that causes loss of the anticorrosion layer on the surface of the lead-out wire. When the number of times accumulates to affect the thermal resistance measurement When the accuracy is high, start the maintenance mechanism to maintain the anti-corrosion layer on the surface of the lead-out line.

Description

technical field [0001] The invention relates to the technical field of circuit components, in particular to an assembled thermal resistance that is easy to maintain. Background technique [0002] Thermal resistance is one of the most commonly used temperature detectors in medium and low temperature regions. Thermal resistance thermometry is based on the characteristic that the resistance value of metal conductors increases with temperature. Its main features are high measurement accuracy and stable performance. Among them, platinum thermal resistance has the highest measurement accuracy. It is not only widely used in industrial temperature measurement, but also made into a standard benchmark. Thermal resistances are mostly made of pure metal materials, and platinum and copper are currently the most widely used. In addition, nickel, manganese and rhodium have begun to be used to manufacture thermal resistances. There are many types of temperature-sensing materials commonly...

AI Technical Summary

Problems solved by technology

From the temperature measurement principle of the thermal resistance, it can be known that the change of the measured temperature is directly measured by the change of the resistance value of the thermal resistance. Therefore, the change of the resistance of various wires such as the lead-out wire of the thermal resistance will affect the temperature measurement.

With the increase of the use time, the anti-corrosion layer on the surface of the lead-out wire that is continuously in contact with the air is gradually worn out, so it is necessary to manually maintain the lead-out part of the thermal resistance on a regular basis to ensure its measurement accuracy. However, most thermal resistances are installed in built-in Such an installation position results in long time-consuming and low efficiency for manual maintenance. It is necessary to propose an assembly-type thermal resistance that is easy to maintain in order to prolong its service life and measurement accuracy.

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