Rotary Stopcock Valve With Tapered Grooves for Precise Flow Control
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Solution Overview
Problem
Traditional stop-cock valves in medical infusion devices lack the precision needed to minutely adjust fluid flow rates for therapeutic applications, necessitating a more precise fluid flow control mechanism.
Innovation Solution
A specialty valve apparatus with a rotatable interference body and tapered grooves that allows for precise control of fluid flow through a valve body, enabling the adjustment of flow rates by rotating the interference body to occlude or regulate fluid flow through tapered grooves communicating with inlet and outlet ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional stop-cock valves are used, then the device structure is simple, but the fluid flow control precision is insufficient
Solution Approach 1:
The valve body is segmented into multiple functional zones including inlet ports, outlet ports, and an internal cavity with tapered grooves. The interference body is divided with a through-bore that has distinct first and second openings, allowing independent control of fluid pathways. This segmentation enables precise flow regulation by controlling which segments are connected through rotation.
Solution Approach 2:
The interference body is designed to be rotatable within the valve body, transforming the static valve structure into a dynamic one. Rotation of the interference body changes the alignment between the through-bore openings and the tapered grooves, dynamically adjusting the fluid flow path and control precision without requiring multiple valve components.
2Manufacturing precision
If traditional stop-cock valves are used, then the device is easy to operate, but the flow rate adjustment precision is insufficient
Solution Approach 1:
The tapered grooves in the valve body create a geometric parameter variation that translates rotational movement into precise flow rate control. As the interference body rotates, the degree of overlap between the through-bore openings and tapered grooves changes continuously, providing fine-grained adjustment of flow rate parameters while maintaining a simple rotational operation interface.
3Manufacturing precision
If a rotatable interference body with tapered grooves is used, then the fluid flow control precision is improved, but the device complexity increases
Solution Approach 1:
Multiple valve functions are merged into a single integrated valve body structure. The inlet ports, outlet ports, internal cavity, and tapered grooves are combined in one component, eliminating the need for separate valve elements. The interference body integrates the through-bore and rotational control features, reducing overall device complexity while achieving precise flow control.
Solution Approach 2:
The valve body serves multiple functions simultaneously: it provides fluid pathways through inlet and outlet ports, creates flow control surfaces with tapered grooves, and houses the rotatable interference body. The interference body itself performs dual functions by providing both the through-bore flow path and the rotational control mechanism, making each component multi-functional and reducing total part count.
Data Source
AI summary
An improved stopcock valve, including a valve body, the valve body having at least one inlet port and at least one outlet port, the valve body having an internal cavity in communication with the at least one inlet port and the at least one outlet port and, a rotatable interference body having a through-bore therein, the rotatable body having an external surface, the through-bore having a first opening to the surface and a second opening to the surface, the interference body positioned within the internal cavity of the valve body, the external surface including a first tapered groove in communication with the first opening and a second tapered groove in communication with the second opening, the grooves arranged to be in communication with the at least one inlet port and the at least one outlet port upon rotation of the body.