Gas Generation Device With External Actuator Diaphragm
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Solution Overview
Problem
Existing gas generation devices face challenges with sealing issues and maintenance complexities due to the placement of actuators within the catalysis chamber, which are exposed to harsh chemical and thermal conditions during catalytic hydrolysis reactions.
Innovation Solution
The device features a deformable wall connected to an external actuator, allowing the valve member to move between closed and open positions without direct sealing requirements, facilitating maintenance and avoiding chemical and thermal stress on the actuator. The actuator is electric and secured to a control module for precise control and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the actuator is placed inside the catalysis chamber to control the valve member, then the sealing problem is mitigated, but the actuator is exposed to harsh chemical and thermal conditions making maintenance complicated and potentially causing malfunction
Solution Approach 1:
A deformable membrane acts as an intermediary between the actuator and the catalysis chamber. The membrane transmits the actuator's motion to move the valve member while maintaining isolation between the actuator and the harsh chemical environment. This allows the actuator to remain outside the catalysis chamber, preserving ease of maintenance while still achieving reliable valve control.
Solution Approach 2:
The system is segmented into distinct zones: the actuator operates in a clean external environment, the deformable membrane serves as a boundary interface, and the valve member operates within the catalysis chamber. This segmentation allows each component to operate in its optimal environment, with the actuator easily maintainable and the valve effectively sealed.
2Reliability
If the actuator is placed inside the catalysis chamber, then sealing is improved, but the actuator is subjected to chemical and thermal stresses that can cause destruction
Solution Approach 1:
The deformable membrane serves as a protective intermediary that isolates the actuator from harmful chemical and thermal factors in the catalysis chamber. The membrane allows mechanical motion transmission while blocking exposure to corrosive chemicals and extreme temperatures, enabling the actuator to remain in a benign external environment.
Solution Approach 2:
A flexible deformable membrane is used to transmit actuator motion while providing environmental isolation. The membrane's flexibility allows it to deform under actuator force to move the valve member, while its material properties resist penetration by chemicals and provide thermal insulation, protecting the actuator from harmful factors.
3Device complexity
If a traditional actuator with direct sealing is used, then the structure is simpler, but sealing problems arise that compromise safety and operation
Solution Approach 1:
The deformable membrane provides a simple yet effective sealing solution. Instead of complex mechanical seals requiring precise alignment and maintenance, the flexible membrane naturally conforms to the opening, providing reliable sealing through its elasticity and chemical resistance. This maintains relative structural simplicity while dramatically improving sealing reliability.
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
This design enhances the operational safety and maintainability of the device by eliminating sealing issues and protecting the actuator from chemical and thermal stresses, while allowing for accurate control and efficient energy use in gas generation processes.
Implementation Method 1
a deformable wall (4) connected to an external actuator (10), allowing the valve member (5) to move between closed and open positions
Implementation Method 2
the deformable wall is made of an elastomer, preferably of the butyl family or of the hydrogenated nitrile family because of their high degrees of chemical resistance
Data Source
AI summary
A device for generating a gas by putting a liquid into contact with a catalyst includes an enclosure defining a first chamber for containing the liquid and a second chamber for containing the catalyst. A valve member is mounted to move inside the enclosure between a closed position in which the first chamber and the second chamber are isolated from each other and an open position in which the first chamber and the second chamber are in fluid-flow communication. Accordingly, the valve member is connected to an elastically-deformable diaphragm forming a wall of the enclosure. The diaphragm is coupled to an actuator arranged outside the enclosure to deform said diaphragm in such a manner as to move the valve member between the closed position and the open position.