Integrated Flow Rate Control Mechanism for Gas Chromatograph
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Solution Overview
Problem
Conventional gas chromatograph flow rate control mechanisms have numerous channel connections, which increase the risk of gas leakage and impurity admixture, affecting analysis results.
Innovation Solution
A single-block flow rate control mechanism with integrated connection units, internal channels, and a flow rate control valve reduces the number of channel connections requiring sealing, minimizing gas leakage and impurity ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple component elements are connected to channels using O-rings, then the flow rate control mechanism can be assembled with separate parts, but the risk of gas leakage and impurity admixture increases
Solution Approach 1:
The patent merges multiple separate component elements (connection blocks, flow rate control valve, pressure sensor, flow rate sensor) into a single integrated flow rate control unit. This eliminates the need for multiple O-ring connections between separate parts, thereby maintaining gas tightness while still allowing for manufacturing and assembly. The integrated design ensures that the gas passage is sealed throughout without requiring multiple sealing points.
2Adaptability or versatility
If numerous channel connections are made with sealing members, then the flow rate control mechanism can accommodate multiple components, but the complexity of sealing and maintenance increases
Solution Approach 1:
The patent combines multiple functional components into a single integrated unit where the gas passage, flow rate control valve, pressure sensor, and flow rate sensor are housed together. This eliminates the need for multiple separate sealing connections, reducing sealing complexity while maintaining the ability to accommodate multiple functional elements within the unified structure.
3Ease of manufacture
If multiple O-rings are used to seal channel connections, then separate components can be connected, but the risk of impurity admixture and analysis errors increases
Solution Approach 1:
The patent integrates all flow control and measurement components into a single sealed unit, eliminating multiple O-ring connection points where impurities could enter or gases could leak. This integrated design maintains manufacturing ease through modular construction while ensuring high analysis accuracy by preventing any potential contamination paths that would exist with multiple separate connections.
Data Source
AI summary
One end of carrier gas channel, purge gas channel and split gas channel is connected to sample gasification chamber. The other end of carrier gas channel, purge gas channel, and split gas channel is connected to a flow rate control mechanism in the form of carrier gas flow rate control block, purge gas flow rate control block and split gas flow rate control block respectively. Carrier gas flow rate control block, purge gas flow rate control block and split gas flow rate control block constitute a flow rate control unit. This reduces the possibility of leakage of gas to the outside and admixture of impurities from the outside in the flow rate control mechanism.