Pneumatic Manifold Faceplate for Accessible, Clean Valve Service
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Solution Overview
Problem
Medical fluid delivery machines, particularly those used in renal failure therapies, face challenges with pneumatic valve accessibility and sealing, leading to potential contamination and premature failure due to particulate introduction during threading, and require improved maintenance access for pneumatic components.
Innovation Solution
A medical fluid delivery machine design featuring a pneumatic manifold with a removable faceplate and clamping bracket for easy access to pneumatic valves, utilizing o-rings for sealing and a gasket system to prevent particulate entry, and a modular electronics cage for enhanced serviceability and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pneumatic valves are integrated into the pneumatic manifold housing, then the machine structure is compact, but the pneumatic valves become difficult to access for maintenance and replacement
Solution Approach 1:
The pneumatic manifold assembly is segmented into a stationary housing and a removable faceplate section. The faceplate can be detached to provide direct access to the pneumatic valves mounted on the manifold, allowing maintenance personnel to service valves without disassembling the entire pneumatic system. This segmentation resolves the contradiction by maintaining a compact integrated structure during operation while enabling easy access during maintenance.
2Reliability
If threaded connections are used to attach pneumatic components, then the connection is secure, but particulates can be introduced during threading causing contamination and premature failure
Solution Approach 1:
A bracket with a bore is introduced as an intermediary component between the threaded connection and the pneumatic pathway. The bracket's bore acts as a barrier that prevents particulates generated during threading from entering the pneumatic system. The threaded connection is made to the bracket rather than directly to the pneumatic component, and the bracket is then attached to the pneumatic component through the bore, which filters out any particulates.
3Ease of repair
If a removable faceplate is added to provide access to pneumatic valves, then maintenance access is improved, but the device complexity increases
Solution Approach 1:
The pneumatic manifold is segmented into a stationary housing and a removable faceplate that can be detached to access the pneumatic valves. This segmentation allows the faceplate to be removed independently for maintenance while leaving the rest of the pneumatic system intact, providing easy access without requiring complete disassembly.
Solution Approach 2:
The faceplate is designed to be removable and replaceable, creating a maintenance access point that does not disrupt the overall pneumatic system pressure or functionality. The faceplate can be removed, valves serviced, and the faceplate reinstalled without affecting the operational state of the pneumatic system, maintaining equipotential conditions throughout.
Data Source
AI summary
A medical fluid delivery machine includes a medical fluid pump, at least one of a positive air pressure source or a negative air pressure source for supplying positive or negative pressure air, a pneumatic manifold including an air passageway, a pneumatic valve, and a bracket. The pneumatic valve defines a valve aperture sized and arranged such that when the pneumatic valve is abutted against the pneumatic manifold, the valve aperture engages the manifold aperture, the pneumatic valve including a gasket that extends around the valve aperture.