Chemical Liquid Injector Branch Valve Layout for Reverse Flow Blocking
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Solution Overview
Problem
Existing chemical-liquid injectors face challenges in effectively controlling the flow of chemical liquids through circuits with multiple components, particularly in preventing reverse blood flow during refilling and ensuring reliable operation.
Innovation Solution
A chemical-liquid injector with a detachable circuit featuring a flow channel opening/closing mechanism at the branching point of patient and transducer lines, incorporating unidirectional valves and a flow channel opening/closing valve to manage fluid flow directionally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a chemical-liquid circuit with multiple components (valves, branching portions) is used to control chemical liquid flow, then the flow control capability is improved, but the reliability of preventing reverse blood flow deteriorates
Solution Approach 1:
The patent applies preliminary action by positioning the flow channel opening/closing mechanism at the branching portion before reverse blood can travel upstream. The mechanism proactively closes the patient line flow channel when the bottle line is opened, preventing reverse blood from reaching the closing portion of the patient line before it can cause contamination.
Solution Approach 2:
The flow channel opening/closing mechanism acts as an intermediary device between the patient line and bottle line branching portions. It mediates the flow control by selectively opening/closing flow channels based on operational mode (injection vs. refilling), ensuring that reverse blood cannot bypass the control mechanism to reach upstream areas.
2Adaptability or versatility
If the bottle line is opened for refilling while the patient line is closed, then the refilling operation is enabled, but reverse blood may reach upstream sides of closing portions
Solution Approach 1:
The system performs preliminary action by closing the patient line flow channel through the flow channel opening/closing mechanism before the bottle line is opened for refilling. This preemptive closure prevents reverse blood from the bottle line from reaching upstream portions of the patient line during the refilling operation.
Solution Approach 2:
The patent applies preliminary anti-action by establishing a counter-measure (closing the patient line) before the harmful action (reverse blood flow during refilling) can occur. The flow channel opening/closing mechanism is positioned and configured to automatically close the patient line when refilling operations commence, neutralizing the potential harm before it can manifest.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables precise control of chemical liquid flow, preventing reverse blood flow and ensuring reliable operation, enhancing the safety and efficiency of chemical liquid injection processes.
Implementation Method 1
incorporating unidirectional valves and a flow channel opening/closing valve to manage fluid flow directionally
Implementation Method 2
a flow channel opening/closing mechanism which is at a downstream side of a branching portion of the patient line and the transducer line
Data Source
AI summary
A chemical-liquid injector which is capable of controlling the flow of a chemical liquid in a chemical-liquid circuit. The chemical-liquid injector has a chemical-liquid circuit mounting section on which a chemical-liquid circuit having a patient line and a transducer line which is branched from the patient line as the flow channels of the chemical liquid, is mounted. The chemical liquid injector has a flattening mechanism on a downstream side of a branching portion of the patient line and the transducer line of the chemical-liquid circuit mounting section.