Ball Valve Anti-Rotation Protrusion Design
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Solution Overview
Problem
Conventional ball valves face increased processing labor time and simultaneous rotation issues between the ball and ball seat, which affect the stability of the flow passage cross-section.
Innovation Solution
A ball valve design where the ball seat and valve body are made of different materials, with a protrusion formed on the harder component to bite into the softer component, preventing simultaneous rotation and reducing processing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protrusion is formed on the bottom of the ball seat and a hole into which the protrusion is fitted is formed on the ball seat support surface of the valve body, then simultaneous rotation of the ball seat and ball is reliably prevented, but processing labor time increases
Solution Approach 1:
Instead of forming a protrusion on the ball seat and a corresponding hole in the valve body (as in conventional design), the invention inverts the approach by forming the protrusion directly on the ball seat support surface of the valve body and fitting it into a recess on the ball seat. This inversion simplifies the overall structure and reduces processing complexity while maintaining the anti-rotation function.
Solution Approach 2:
The invention extracts the protrusion feature from the ball seat and relocates it to the valve body's support surface. This separation allows the ball seat to be made of softer material (like PTFE) without requiring complex protrusion processing, thereby reducing processing labor time while maintaining reliable anti-rotation functionality.
2Ease of manufacture
If the ball seat and valve body are made of different materials with a protrusion on the harder component, then simultaneous rotation is prevented with reduced processing complexity, but manufacturing complexity increases
Solution Approach 1:
The invention changes the material parameters by selecting different materials for the ball seat (softer, e.g., PTFE) and valve body (harder, e.g., metal), and changes the geometric parameter by positioning the protrusion on the harder component's support surface. This allows the protrusion to be formed more easily on the harder material while the softer ball seat simply receives the fitting, reducing overall processing labor time despite using multiple materials.
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
The solution effectively prevents simultaneous rotation and maintains stable flow rates over time while reducing processing labor time by eliminating the need for recess formation in the softer material surfaces.
Implementation Method 1
a protrusion is formed on the harder component between a bottom of the ball seat and a ball seat support surface of the valve body to bite into the softer component
Data Source
AI summary
A ball valve which can suppress the increasing of processing labor time and reliably prevent simultaneous rotation of a ball seat and a ball when the ball is rotated by handle manipulation is provided. The valve body 2 is formed of a hard material such as stainless steel, the ball seat is formed of a relatively soft material such as a fluorine resin, and a protrusion 18 is formed on a ball seat support surface 13 of the valve body 2 made of a hard material so as to bite into the ball seat 4.