Double-Valve Coupling for Safe Carbon Nanotube Transfer
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Solution Overview
Problem
Handling and transferring carbon nanotubes pose environmental and personal safety risks due to the potential release of fine powder, and existing transfer devices are unsuitable for industrial-scale operations, especially with nanoparticles like carbon nanotubes, as they risk soiling and malfunctioning.
Innovation Solution
Implementing a double-valve device, such as the 'Buck' or 'Glatt' butterfly valve, which provides a tight seal and prevents external contamination during transfer, allowing safe coupling and decoupling of receptacles without exposing the powder to the outside environment, ensuring maximum safety and compatibility with industrial processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing transfer devices are used for carbon nanotubes, then transfer capability is provided, but the devices risk soiling and malfunctioning due to contact with fine powder
Solution Approach 1:
The transfer device is segmented into two separate valves (first valve and second valve) that can be independently controlled. This segmentation allows the system to maintain sealed conditions during transfer operations, preventing fine powder from contacting and soiling the drive mechanisms, thereby maintaining device reliability.
Solution Approach 2:
A coupling device acts as an intermediary between the two receptacles, providing a controlled interface for powder transfer. The coupling device with double valve mechanism ensures that drive mechanisms remain isolated from direct contact with fine powder, preventing soiling and malfunctioning while enabling reliable transfer operations.
2Object-affected harmful factors
If tight sealing is implemented to prevent environmental release, then safety is improved, but device complexity increases
Solution Approach 1:
The sealing system is segmented into two independently controllable valves instead of one complex valve. This segmentation simplifies the control logic while achieving tight sealing throughout the transfer process, preventing environmental release without excessive complexity.
Solution Approach 2:
The system performs preliminary sealing actions by closing the first valve before initiating powder transfer and closing the second valve after transfer completion. This preliminary and sequential action ensures tight sealing is maintained throughout the process, preventing environmental release while keeping the control sequence straightforward.
3Productivity
If industrial-scale transfer is implemented, then productivity increases, but safety risks from powder exposure increase
Solution Approach 1:
The coupling device with double valve mechanism serves as an intermediary that enables industrial-scale transfer operations while maintaining sealed conditions. This intermediary system allows large quantities of powder to be transferred efficiently through the coupling between receptacles without exposing the powder to the external environment, thus maintaining safety at industrial scale.
Solution Approach 2:
The system creates an inert or controlled environment within the coupling device during transfer operations. By maintaining sealed conditions through the double valve mechanism, the powder remains isolated from the external atmosphere throughout industrial-scale transfer, eliminating exposure risks while enabling high productivity.
Data Source
AI summary
The invention relates to a method for filling a receptacle (200) with carbon nanotubes from another receptacle (106) whereby the CNTs are passed from one receptacle to the other by means of a coupling (300) comprising a double-valve device (30), each valve being coupled to one of the receptacles, the valves (31, 32) closing independently and tightly and being openable only when they are coupled to one another.