Self-Sealing Disconnect Valve for Fluid Systems
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Solution Overview
Problem
Existing butterfly-type valves for environmental control systems do not provide a self-sealing disconnect functionality that allows for selective fluid flow control between two parts, which is essential for certain applications.
Innovation Solution
A self-sealing disconnect valve with two mating halves, each housing an independently activated butterfly valve, that allows fluid flow when coupled and prevents it when uncoupled, utilizing a rack and pinion mechanism and locking flange for secure engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional butterfly valve is used for fluid control, then the valve structure is simple, but the valve cannot provide self-sealing disconnect functionality
Solution Approach 1:
The valve is divided into two separate mating halves, each containing its own butterfly valve mechanism. This segmentation allows each half to independently seal and control fluid flow, enabling the self-sealing disconnect functionality while maintaining relatively simple individual valve structures.
Solution Approach 2:
The patent combines a butterfly valve mechanism with a disconnect coupling mechanism into an integrated assembly. Each half merges the valve function with the connection function, so that sealing and disconnect operations are achieved through the combined action of the two halves rather than requiring a complex single-valve design.
2Adaptability or versatility
If a two-part disconnect valve is designed with independently activated butterfly valves, then fluid flow control is improved, but the device complexity increases
Solution Approach 1:
The valve system is segmented into two independent halves, each with its own butterfly valve that can be activated separately. This allows flexible fluid flow control configurations (both open, both closed, or one open/one closed) while keeping each individual half's structure manageable.
Solution Approach 2:
Each half of the disconnect valve serves multiple functions: it acts as a connection interface for mating with the other half, contains a butterfly valve for fluid control, and provides sealing surfaces. This multi-functionality reduces the need for additional separate components, offsetting the complexity of having two independently activated valves.
3Ease of operation
If rack and pinion mechanism is used to activate butterfly valves, then precise valve control is achieved, but the manufacturing complexity increases
Solution Approach 1:
The patent replaces direct manual operation of the butterfly valve with a rack and pinion mechanical transmission system. This substitution provides precise control and mechanical advantage while using standard mechanical components that can be manufactured using conventional processes, balancing operational precision with manufacturing feasibility.
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
Enables reliable fluid tight sealing and controlled fluid flow between two parts, suitable for applications like spacecraft crew launch vehicles, ensuring safety and efficiency in fluid delivery systems.
Implementation Method 1
The valve includes a rack and pinion mechanism
Data Source
AI summary
Disclosed is a self sealing disconnect for use in connection with an environmental control system. The disconnect includes two mating halves each of which houses an internal butterfly valve. When the halves are engaged, the butterfly valves are opened to complete a fluid circuit. Conversely, when the halves are disengaged, the butterfly valves are close so as to prevent the flow of fluids.