Integrated electric contact liquid level and liquid temperature measurement sensor

Abstract

The invention discloses an integrated electric contact liquid level and liquid temperature measurement sensor. An electric contact and phi2 armored thermocouple electrodes are adopted in the sensor. A plurality of armored thermocouple electrodes are longitudinally arranged on a metal framework and are arranged in a stainless steel protection sleeve integrally; and an electrode lead is led out from a bundle in an upper sealed end plug of the protection sleeve and connected with secondary meters such as a millivolt thermometer and an electric contact water level meter. The integrated electric contact liquid level and liquid temperature measurement sensor is inserted into a high-temperature and high-pressure container to directly measure a real liquid level and a real liquid temperature, so that the sensor is small in measurement error, high in resolution and assembled and used easily and has a compact structure. The sensor is used for measuring the liquid level and the liquid temperature of relevant high-temperature and high-pressure containers of a nuclear reactor, such as a reactor core, a spent fuel battery, a pressure stabilizer and a steam generator, and also can be used for measuring the liquid level and the liquid temperature of the conventional high-temperature and high-pressure containers.

Description

technical field [0001] The invention relates to a liquid level and temperature measuring device for high-temperature and high-pressure containers, in particular to an integrated electric contact liquid level thermometer using thermocouple electrodes (ie, thermocouples). Background technique [0002] Chinese patent literature discloses an "integrated electric contact liquid level gauge" (ZL90209770.9). This solution has the following disadvantages: 1. The electric contact only has the function of measuring water level and cannot also measure water temperature. If water temperature needs to be measured, another Set temperature measurement system. 2. The electrical contact is a welded body of ceramics and metal, and its weld seam is severely corroded by water in liquid (especially in high temperature and high pressure liquid), which often leads to failure of the measuring point. 3. The insulation value of the signal cable is easy to decrease in the above environment, which als...

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Problems solved by technology

[0002] Chinese patent literature discloses an "integrated electric contact liquid level gauge" (ZL90209770.9). This solution has the following disadvantages: 1. The electric contact only has the function of measuring water level and cannot also measure water temperature. If water temperature needs to be measured, another Set temperature measurement system

2. The electrical contact is a welded body of ceramics and metal, and its weld seam is severely corroded by water in liquid (especially in high temperature and high pressure liquid), which often leads to failure of the measuring point

3. The insulation value of the signal cable is easy to decrease in the above environment, which also leads to the failure of the measuring point

3. The protective layer of the signal cable (i.e. the electrode lead) is easily damaged in the above environment, and the exposure of the insulating layer reduces the insulation effect

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