Intelligent switching control method and system of multi-way valve in radionuclide separation

CN122006291BActive Publication Date: 2026-07-03FUJIAN RUISIKE MEDICAL TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUJIAN RUISIKE MEDICAL TECHNOLOGY CO LTD
Filing Date
2026-04-09
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In existing technologies, the switching process of multi-way valves relies on fixed time or empirical parameters and lacks a judgment mechanism based on the actual volume and activity state of the flow path. This results in the difficulty in eliminating flow path residues, a high risk of fluid mixing between stages, and inaccurate timing of target collection channel switching, which affects the purity and safety of radionuclide separation.

Method used

By establishing a volume parameter system based on the dead volume of the liquid outlet section, and combining it with valve position signal, pressure signal and activity signal, quantitative control of the multi-way valve switching process is achieved. A three-stage zero-residue switching unit and an activity window determination mechanism are adopted to ensure the accuracy and safety of flow path switching.

Benefits of technology

This technology enables quantitative control of the multi-port valve switching process, reduces the risk of fluid mixing, improves the stability and consistency of the radionuclide separation process, and ensures the safety of the flow path and the purity of the target nuclide collection.

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Abstract

This invention relates to the field of radioactive separation control technology, and discloses an intelligent switching control method and system for multi-way valves in radionuclide separation, comprising: Step 1, pushing inert liquid to determine the dead volume of the calibrated outlet section, and determining the quantitative clearing volume and the target channel pre-filling volume; Step 2, advancing pre-wetting liquid according to the preset pre-wetting volume and the target channel pre-filling volume; Step 3, advancing the feed liquid according to the sample loading volume, and executing the safety flushing volume according to the pressure signal; Step 4, purging the first and second rinsing liquids according to the quantitative clearing volume; Step 5, collecting activity signals to generate activity window entry and activity window exit signals; Step 6, responding to the signals to switch to the target collection channel according to the isolation section volume, quantitative clearing volume, and target channel pre-filling volume; Step 7, cleaning and purging, resetting the default safety position, and recording the cumulative pump advance volume. This invention realizes quantitative and time-sequential management of flow path switching during radionuclide separation.
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