Neutron moisture gauge detector

Abstract

The invention discloses a neutron moisture gauge detector which comprises a housing, a cadmium plate layer wrapped on the outer wall of the housing and a neutron source arranged at a vertical center of the cavity of the housing, wherein a back reflection plate closely connected with the inner wall of the housing and the outer wall of the neutron source is horizontally arranged in the cavity of the housing, an electronics unit mainly composed by a high voltage module and a signal processing module is arranged at the bottom of the cavity of the housing, residual space in the cavity of the housing below the back reflection plate is filled with shielding layers, a plurality of sets of counting tube supports symmetrically arranged from interior to exterior and counting tubes installed on the supports are arranged around the head of the neutron source in space in the housing above the back reflection plate, the root parts of the supports are fixed on the back reflection plate, the counting tubes are installed to form a rectangular array, the height of the counting tubes on the supports gradually increases from interior to exterior to form ladder distribution, an inclined plane reflection plate in a loop corridor is arranged around the counting tubes on the supports, the sidewall of the inclined plane reflection plate is fixed on the sidewall of the housing, and the bottom of the inclined plane reflection plate is fixed on the back reflection plate. The neutron moisture gauge detector provided by the invention has the advantages of good sensitivity, high usage efficiency of the neutron source and the like.

Description

technical field [0001] The invention relates to a moisture detector, in particular to a neutron water meter detector for detecting the moisture of coke before the blast furnace enters the furnace. Background technique [0002] In the process of blast furnace smelting in steel mills, because the coke put into use usually contains a certain amount of moisture, it often causes changes in the content of charcoal in the furnace, resulting in fluctuations in furnace temperature and affecting the quality of products released from the furnace. Usually in the production process, in order to more accurately control the content of the coke entering the blast furnace, it is necessary to test the moisture content of the coke before entering the furnace, so as to better stabilize the furnace temperature and improve the quality of the product. [0003] Neutron water measurement technology originated in the mid-1980s, and has been widely used in industrial environments such as steel smeltin...

AI Technical Summary

Problems solved by technology

At present, neutron water measuring devices have mature products at home and abroad, and there are many kinds of probes, such as: the Chinese patent whose publication number is CN87206967 describes a "neutron water measuring instrument probe". The counting tubes are arranged around the two sides of the neutron source in a one-dimensional array, and the disadvantages are:

[0004]1. Due to the low height of the reflector, the safety of radiation protection is reduced;

[0005]2. Due to the moderation and scattering effect of the material, more leaked neutrons that cannot be shielded by the device may be generated on the contact surface between the device and the material bundle, causing pollution to the surrounding environment

[0006]3. The cross-sectional area of ​​the device is small, and the detection area and measurement depth are limited

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