High-temperature resistant sucker top column for installing high-temperature radioactive source

Abstract

The invention relates to a high-temperature resistant sucker top column for installing a high-temperature radioactive source. The sucker top column comprises a hollow sucker top column body and a protective disc assembly, wherein the hollow sucker top column body can extend into an inner cavity of the protective disc assembly and can axially move relative to the protective disc assembly; and the bottom surface of the hollow sucker top column body and the upper surface of a workpiece form a sealing surface, and the inner side of the inner cavity of the protective disc assembly and the side surface of the workpiece form a sealing surface. The sucker top column has the following beneficial effects that a silica gel sucker is not adopted, the rigidity of the whole structure is ensured by a vacuum suction mode, the high temperature of the radioactive source can be borne, and the mechanical operation of the installation of the radioactive source is realized; and a limiting protective disc isadopted, thus it is ensured that the radioactive source is coaxial with a carbon-carbon cylinder heat insulation layer (high-temperature radioactive source cladding), and incapability of positioningdue to deviation is prevented.

Description

technical field [0001] The invention belongs to the field of the nuclear industry, and in particular relates to a high-temperature-resistant sucker top post for installing a high-temperature radioactive source. Background technique [0002] The high-temperature radioactive source needs to be encapsulated in a carbon-carbon cylindrical casing at the end. Since the radiation dose rate of the radioactive source is very high, in order to reduce the dose received by the operator, the whole process is mechanized. One of these steps is the insertion of radioactive sources into the carbon-carbon cladding insulation, such as figure 1 shown. After the radioactive source is sucked by the vacuum suction cup, it is positioned to be coaxial with the heat insulation layer of the carbon-carbon cladding cylinder, and then the suction cup moves downward at a certain speed to push the radioactive source into the carbon-carbon cladding heat insulation layer, and then into the to the preset po...

AI Technical Summary

Problems solved by technology

[0003] The traditional suction cup is a silicone suction cup, but this is not suitable for the installation of high-temperature radioactive sources. One is that the rigidity of the silicone suction cup is not enough to meet the frictional resistance during the pressing process of the radioactive source. The other is that the high temperature on the surface of the radioactive source far exceeds the traditional one. Silicone suction cup resistant to temperature

At the same time, since the radioactive source is not magnetic, an electromagnetic chuck cannot be used.

Therefore, the traditional suction cup cannot meet the installation requirements of radioactive sources, and cannot achieve precise installation.

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