Integrated Stopcock Coupling for One-Handed Drip-Free Disconnection
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Solution Overview
Problem
Existing coupling devices with integrated stopcocks for flow connections lack efficient one-handed operation and drip-free disconnection, particularly in applications involving chemical transport where secure shut-off of both inlet and outlet is necessary.
Innovation Solution
A coupling device with a plug-and-rotate lock mechanism where the plug part is inserted radially into the rotary part, allowing for a 60° swivel to connect and disconnect, utilizing a bayonet joint design with a bolt and slot system for secure sealing, enabling one-handed operation and drip-free disconnection of both inlet and outlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional coupling device with integrated stopcock is used, then the device can connect flow connections, but it requires two-handed operation and cannot ensure drip-free disconnection
Solution Approach 1:
The invention combines the stopcock function and coupling function into a single integrated device. The coupling plug incorporates a stopcock mechanism directly into its structure, allowing the user to control fluid flow and connect/disconnect lines with one hand. The stopcock lever is integrated with the coupling plug body, eliminating the need for separate control mechanisms.
Solution Approach 2:
The coupling device performs multiple functions simultaneously: it acts as both a connection mechanism and a flow control valve. The coupling plug can be inserted to connect lines while automatically controlling the stopcock to open or close flow paths, providing universal functionality for both connection and flow management in a single operation.
2Reliability
If a conventional coupling device is used, then the structure is simple, but it cannot ensure drip-free disconnection of flow connections
Solution Approach 1:
The stopcock mechanism is activated in advance before the actual disconnection occurs. When the coupling plug is pulled out, the stopcock lever automatically closes the flow path first, sealing the connection before complete separation. This preliminary closing action prevents drips by ensuring the flow path is sealed before the physical connection is broken.
Solution Approach 2:
The design incorporates a sealing mechanism that prepares for potential leaks by maintaining positive pressure on the sealing elements throughout the disconnection process. The stopcock mechanism ensures continuous sealing engagement, cushioning against any pressure fluctuations that might cause dripping during the transition from connected to disconnected state.
3Ease of operation
If a coupling device for chemical transport is used, then secure shut-off is necessary, but existing devices lack efficient one-handed operation
Solution Approach 1:
The stopcock control lever is integrated directly into the coupling plug structure, allowing the user to operate the shut-off valve and connection mechanism simultaneously with one hand. The lever is positioned and sized for easy manual operation while maintaining secure sealing, combining operational ease with reliable shut-off in a single integrated control element.
Data Source
AI summary
A coupling device having an integrated stopcock for placement in a flow connection between a first line and a second line includes a carrier body having a connection for the second line, a plug part having a connection for the first line, and a rotary part being rotatable by the plug part, disposed in the carrier body between the connections and having an opening. The two connections are connected for flow through the opening in a rotated end position of the rotary part. A plug-and-rotate lock is formed between the plug part and the carrier body. The plug part is detachably plugged into the rotary part and can be rotated in the carrier body together with the rotary part. A device for supplying a flowable substance from a container to a discharge point is also provided.