Thermocouple multi-point temperature measurement device and test reactor

Abstract

The invention discloses a thermocouple multi-point temperature measuring device, which comprises: at least two thermocouple wires; At least two outlet holes are provided on the wall, and the at least two outlet holes are spaced apart in the axial direction of the casing, wherein: one end of each thermocouple wire penetrates into the casing and exits from a corresponding outlet hole Leading out of the outer wall of the casing, the leading thermocouple wire segment extends approximately perpendicular to the axial direction of the casing as a temperature measuring section, and the diameter of the thermocouple wire is slightly smaller than the inner diameter of the leading hole. It also relates to a simulated pressure reactor, comprising: a simulated pressure reactor vessel; a plurality of electric heating rods; and at least one of the above-mentioned thermocouple multi-point temperature measuring devices, and the axial direction of the casing of the thermocouple multi-point temperature measuring device is parallel to the container The axial direction of the thermocouple multi-point temperature measuring device is placed between the gaps between the adjacent electric heating rods.

Description

technical field [0001] The invention relates to thermal measurement, in particular to a thermocouple multi-point temperature measuring device and core temperature field measurement of a simulated pressure reactor with the same. Background technique [0002] The measurement of the core temperature field is usually carried out by arranging multiple multi-point thermocouple temperature measuring devices in the core to realize the three-dimensional temperature field measurement. At present, the special multi-point thermocouple temperature measurement products at home and abroad are widely used in the electric power or petrochemical industry to monitor the temperature stratification of the medium in the large space container, such as the special multi-point thermocouple used in the chemical catalyst reactor. This kind of multi-point thermocouple usually uses a flange-mounted structure, usually installed in a non-pressure vessel or a low-pressure vessel. The armored thermocouple u...

AI Technical Summary

Problems solved by technology

This kind of multi-point thermocouple usually uses a flange-mounted structure, usually installed in a non-pressure vessel or a low-pressure vessel. The armored thermocouple used is encapsulated in a stainless steel protective sleeve, which cannot be in direct contact with the medium, and the temperature response time is longer. There are thermal conductivity errors in the measurement results

[0003] The reactor pressure vessel test device used for the test has a special simulated internal structure of the reactor core and a very small installation space after scaled down. The multi-point thermocouple used in conventional industries is not suitable.

Specifically, electric heating rods simulating fuel rods are arranged in the reactor pressure vessel test device, and the reactor core is designed to simulate the flow area of ​​the prototype reactor in proportion. The reactor pressure vessel is also designed with a multi-layer heating rod support grid, resulting in a temperature field measurement device The installation space is very limited, and the installation of multi-point thermocouples in a small space requires a special structural design of the temperature measuring device

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