GC Carrier Gas Connection Block for Fast Leak-Tight Switching
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Solution Overview
Problem
Gas chromatographs face challenges in efficiently and quickly switching between different carrier gases for multiple channels, leading to time-consuming manual processes prone to errors and leaks, especially when adding or removing channels.
Innovation Solution
A carrier gas connection device with a carrier block and channel adaptor system that allows for easy switching between carrier gases by manual movement, using a clamping system to form fluid-tight connections and prevent leaks, and includes vent gas pathways for efficient sample waste management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual cutting and routing of tubing with ferrule-nut connections is used to connect carrier gas sources to flow control modules, then fluid-tight connections can be achieved, but the process becomes time-consuming and prone to errors and leaks
Solution Approach 1:
The device is divided into modular components: a carrier block with multiple carrier gas sources, flow control modules, and interchangeable channel adapters. Each channel adapter can be independently connected to the carrier block, allowing rapid switching between different carrier gas configurations without manual tubing routing for each connection.
Solution Approach 2:
The channel adapters are designed to be movable and interchangeable between different positions on the carrier block. This dynamic configuration allows users to quickly switch between different carrier gas sources by simply moving or replacing the adapter, eliminating the need for permanent fixed connections.
2Reliability
If traditional ferrule-nut connections are used for carrier gas lines, then fluid-tight seals can be formed, but the process of making and breaking connections is complex and error-prone
Solution Approach 1:
Multiple carrier gas source connections are merged into a single integrated carrier block structure. The channel adapter serves as a unified interface that simultaneously connects to multiple carrier gas sources and the flow control module, eliminating the need for separate ferrule-nut connections for each gas line.
Solution Approach 2:
The channel adapter acts as an intermediary component between the carrier gas sources and the flow control module. It provides a standardized interface that simplifies connections while maintaining seal integrity, replacing the complex multi-point ferrule-nut connection system with a single adapter component.
3Adaptability or versatility
If multiple channels are added to a GC system, then analytical capacity increases, but the difficulty and effort of making fluid-tight connections multiplies
Solution Approach 1:
The carrier block and channel adapter design provides universal connectivity for multiple channels. Each channel adapter can be connected to any carrier gas source position on the carrier block, and the same adapter type can serve multiple channels, reducing the overall complexity of managing multiple connections.
Solution Approach 2:
The carrier gas sources and flow control modules are pre-configured and permanently connected to the carrier block during manufacturing. This preliminary setup eliminates the need for users to perform complex connection operations when adding or configuring channels, as they only need to attach pre-made channel adapters.
4Productivity
If tubing is eliminated when removing a channel, then system simplification occurs, but rerouting of carrier gas lines is required
Solution Approach 1:
The channel configuration is segmented into modular channel adapters that can be independently attached or detached from the carrier block. When a channel is removed, only the specific channel adapter needs to be detached, not the entire carrier gas distribution system, eliminating the need for rerouting.
Solution Approach 2:
The carrier block design automatically manages carrier gas distribution to active channels. When channel adapters are detached, the carrier gas flow automatically redirects to remaining connected channels without requiring manual rerouting or reconfiguration of the gas distribution system.
Data Source
AI summary
Carrier gas connection devices (100, 402, 404, 406, 408) enable one to change the carrier gas provided to a gas chromatography channel. The carrier gas connection devices (100, 402, 404, 406, 408) comprise a channel adaptor (102, 202), a carrier block (104, 302), and a clamping system, and two or more channel adaptor positions. In each of the channel adaptor positions, a fluid-tight flow path for carrier gas out of the carrier block (104,302) into the channel adaptor (102, 202) is formed. Carrier gas distribution systems (400), gas chromatography instruments, and methods of changing a carrier gas supplied to a GC are also provided.