Temperature measurement device for double layer liquid metal sodium pipeline and its mounting method

Abstract

The invention discloses temperature measuring equipment used for a double layer liquid metallic sodium pipeline, and an installing method thereof. The equipment consists of a pipeline, a sleeve chuckand a temperature thermocouple, wherein, the temperature thermocouple extends into the pipeline and is fixed in the pipeline in a sealing way by the sleeve chuck; the head of the pipeline is pressed onthe inner layer pipeline of the double layer pipeline. The installing method of the equipment comprises the following steps: the outer layer pipeline of the double layer pipeline is cut into an ellip tic outer layer pipeline which is provided with holes and then sheathed on the pipeline; the method is characterized in that (1) the head of the pipeline sheathed with the elliptic outer layer pipeline is pressed on the outer wall of the inner layer pipeline; (2) the pipeline and the elliptic outer layer pipeline, as well as the elliptic outer layer pipeline and the pipeline are respectively welded; (3) the temperature thermocouple is inserted into the head of the pipeline along the pipeline and fixed on the pipeline by the sleeve chuck. The equipment and the installing method of the inventionare safe and reliable, have simple structure, simple and easy processing and installing steps, and can replace the temperature thermocouple momentarily.

Description

technical field [0001] The invention relates to the technical field of temperature measurement at a special pipeline position, in particular to a temperature measurement device for a double-layer liquid metal sodium pipeline and an installation method thereof. Background technique [0002] In the sodium-cooled fast reactor, liquid metal sodium is used as the heat carrier, and metal sodium can quickly react with oxygen, carbon dioxide and moisture in the air. At high temperatures, the operating temperature of some loops of the sodium-cooled fast reactor is above 300°C. If Direct leakage of high-temperature sodium into the air will greatly increase the risk of circuit operation, so double-layer pipelines are used to isolate the sodium pipeline. For the measurement of the liquid metal temperature in the general pipeline, the thermometer is directly inserted into the liquid metal, but due to the activity of sodium, the measurement of directly inserting the thermometer into the l...

AI Technical Summary

Problems solved by technology

For the measurement of the liquid metal temperature in the general pipeline, the thermometer is directly inserted into the liquid metal, but due to the activity of sodium, the measurement of directly inserting the thermometer into the liquid metal sodium causes its additional equipment to be more complicated, and due to the sodium in the pipeline It is fast flowing, and the thermometer must have a set of shear-resistant devices in the flowing sodium, otherwise the safety of the thermometer cannot be guaranteed, and more importantly, opening holes in the sodium pipeline greatly increases the risk of sodium pipeline leakage and the resistance in the pipeline

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