Loop sensor for temperature measurement of cable conductor and method for manufacturing same

Abstract

The invention relates to a loop sensor for measuring cable conductor temperature and a production method thereof, while the loop sensor is made of two thermocouple wires, which is characterized in that: the thermocouple wires have a semicircle temperature sensing end welded with a copper ring pad. The production method comprises: bending the ends of the two thermocouple wires into a semicircle shape and coating tin uniformly; welding the ends of the thermocouple wires in the tinned plane of a copper sheet; supplying solder tin for the non-welded part of the thermocouple wires in the tinned plane of the copper sheet to obtain a uniform annular solder tin layer at the upper part of the copper sheet, thereby completing the production of the loop temperature sensing electrode. The invention has the advantages that the annular sensor can accurately and real-timely measure the conductor temperature at any part of a cable in a narrow space, according to research demands, to effectively monitor the operation state and the conductor temperature of a cable circuit under different loads, thereby providing scientific and effectively technique information for the safe operation of cable circuits.

Description

technical field [0001] The invention belongs to a cable conductor temperature measuring device, in particular to a ring sensor used for cable conductor temperature measurement and a manufacturing method thereof. Background technique [0002] Due to the needs of urban construction, the newly built power trunk lines in urban areas usually abandon the previous overhead line transmission mode and use power cable lines laid directly in underground special tunnels or soil to avoid electromagnetic interference from overhead lines and excessive land occupation. Large and other adverse effects on urban planning. Existing power cables usually use solid materials as the main part to ensure their electrical insulation performance, and their reliability is the most important factor in power cables. In practical applications, whether the insulation performance of the cable material is safe or not is closely related to the temperature of the conductor due to the load. The cable industry h...

AI Technical Summary

Problems solved by technology

The traditional measurement method usually uses an ordinary point temperature sensor. When installing, the ground cable body needs to be cut longitudinally, and the temperature sensing part of the point temperature sensor and the cable conductor part are fixed in contact with the traditional fastening method, so that The test and installation method of the present invention has the following deficiencies: 1. The anatomy and reduction range of the cable is too large, which affects the structure of the cable body and the distribution of the thermal field, and there is a theoretical error between the measurement data and the original cable; 2. The installation and fixation of the sensor Using ordinary contact methods, the temperature transfer effect and reliability between the sensor and the measured conductor are poor; 3. The workload is heavy and the installation process is cumbersome

Images