Conical Flow Regulating Valve for Polygonal Flow Control
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Solution Overview
Problem
Existing flow regulating valves have linear flow characteristic curves, which cannot meet the requirements of different systems and use conditions that necessitate a polygonal-shape flow characteristic curve for effective flow regulation.
Innovation Solution
A flow regulating valve design featuring a valve body with a first and second conical surface on its inner wall and a valve head with a chamfer, where the included angles of these surfaces satisfy the relationship b < a < c, resulting in a polygonal-shape flow characteristic curve when the valve port is opened or closed, thereby ensuring accurate flow regulation and minimizing flow jitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a linear flow characteristic curve is used in the flow regulating valve, then the structure is simple and easy to manufacture, but it cannot meet the requirements of different systems and use conditions that necessitate a polygonal-shape flow characteristic curve for effective flow regulation
Solution Approach 1:
The valve port inner wall is divided into multiple conical surfaces (first conical surface, second conical surface, etc.) with different inclination angles. Each conical surface corresponds to a specific opening degree range and produces a specific flow characteristic segment. By segmenting the valve port into multiple zones with different geometric characteristics, the patent achieves a polygonal-shape flow characteristic curve that can meet diverse flow regulation requirements while maintaining a relatively simple overall structure.
2Ease of operation
If the valve head moves close to the turning part of the valve port during opening, then the opening degree can be increased, but flow jitter occurs due to eddy current at the turning part
Solution Approach 1:
The patent extracts or removes the harmful turning part (transition edge between conical surfaces) from the flow path by designing the valve head chamfer geometry and positioning it such that the valve head does not approach too close to the turning part during opening. This extraction of the problematic geometric feature from the active flow region eliminates the source of eddy currents and flow jitter, allowing the valve to achieve large opening degrees while maintaining stable flow.
3Productivity
If the valve head is positioned to achieve full open state, then maximum flow is required, but positioning becomes difficult without proper geometric constraints
Solution Approach 1:
The patent applies local quality by giving specific geometric characteristics to different regions of the valve port and valve head. The chamfer of the valve head is designed with a specific inclination angle that matches or complements the conical surfaces of the valve port. This local geometric matching creates natural positioning points and flow guidance that facilitate accurate positioning of the valve head in the full open state, ensuring maximum flow capacity while simplifying positioning requirements.
Data Source
AI summary
A flow regulating valve comprises: a valve body, wherein the valve body has a valve port, an inner wall of the valve port has a first conical surface and a second conical surface, an included angle between a generatrix of the first conical surface and a radial plane of the valve body is b, and an included angle between a generatrix of the second conical surface and the radial plane of the valve body is c; and a valve head, wherein the valve head is movably disposed in the valve body to close or open the valve port, the valve head has a chamfer, and an included angle between the chamfer and the radial plane of the valve body is a; where, b<a<c.