Rotary Infusion Valve Layout for Flushing and Leak Tightness
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Solution Overview
Problem
Existing medical valve systems face challenges in optimizing space usage and ensuring tightness, which can lead to potential leaks and safety issues during the administration of medicinal liquids in infusion therapy.
Innovation Solution
A medical valve system with a valve body that can be rotated to various positions, featuring a flushing inlet connected to a flushing outlet via a radial bore, a scavenging channel with a flow obstacle to prevent direct fluid connection, and locking connections to ensure defined rotational alignment and prevent unintentional position changes, optimizing space and reducing leak risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the flushing inlet is located on the outer surface of the valve housing, then the flushing fluid can be easily supplied, but more installation space is consumed and sealing points are increased leading to potential leaks
Solution Approach 1:
The flushing inlet is integrated into the valve body itself rather than being a separate component on the valve housing. The valve body is rotated into the flushing position to align the flushing inlet with the flushing fluid supply, eliminating the need for external flushing connections and reducing installation space while maintaining ease of flushing fluid supply
Solution Approach 2:
The flushing inlet position is made dynamic through rotation of the valve body. The valve body can be rotated between medication positions and flushing position, allowing the flushing inlet to be brought into alignment with the flushing fluid supply only when needed. This dynamic arrangement reduces the need for permanent external flushing connections
2Adaptability or versatility
If the valve body is rotatable to multiple positions, then different drug liquids can be administered and flushing can be performed, but more sealing points are required increasing leak risk
Solution Approach 1:
The passage is formed as an integral part of the valve body, merging the fluid conduction function with the rotating valve body structure. This integration reduces the number of separate components and sealing interfaces required, thereby maintaining versatility while reducing leak risks
Solution Approach 2:
The valve body serves multiple functions: it contains the passage for drug liquid conduction, provides the flushing inlet, and acts as the rotating element to switch between medication and flushing modes. This multi-functionality reduces the need for separate components and sealing points
3Area of stationary object
If the passage is fluid-conducting connected to drug outlets on the inner housing circumferential surface, then space is optimized, but sealing points between valve body and housing are required
Solution Approach 1:
The drug outlets are positioned on the inner circumferential surface of the valve housing, and the passage in the valve body is designed to align with these outlets when the valve body is in the medication position. This arrangement allows direct fluid conduction while minimizing the need for additional sealing points between the valve body and housing
Data Source
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AI summary
1. Medical valve system. 2.1 Such a medical valve system is known, comprising: - a valve housing with at least two drug inlets, each fluid-conducting and connected to a drug outlet arranged on an inner circumferential surface of the housing; - a valve body arranged at least partially within the valve housing, which is rotatable about an axis of rotation relative to the inner circumferential surface of the housing, having an outer circumferential surface and an inner surface, and a passage arranged on the outer circumferential surface; - a flushing inlet fluid-conducting and connected to a flushing outlet; and - a valve outlet fluid-conducting and connected to the passage; - wherein the valve body is rotatable in at least two drug positions and at least one flushing position. 2.2 According to the invention, the flushing inlet and the valve outlet are arranged on the valve body. 2.3 Use in infusion therapy.