Spherical Paint Selector Valve Plug Sealing
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Solution Overview
Problem
Conventional paint selector valves face challenges in completely removing residual paint from the outflow passage and coating apparatus, leading to potential paint mixing when switching between different colors, which complicates the painting process and increases equipment costs due to the need for multiple paint supply sections and coating apparatus.
Innovation Solution
The design incorporates a paint selector valve with a valve plug and valve seat section that ensures tight contact and sealing, featuring a spherical seating section and a tapered valve seat to prevent liquid pooling and leakage, along with open installation grooves for effective washing and seal member placement to prevent paint mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a valve section is seated on a valve seat member with a predetermined spacing distance, then the valve can be operated, but paint remains in the outflow port and cannot be completely removed during washing
Solution Approach 1:
The patent applies spheroidality by forming the seating section of the valve plug and the valve seat member with substantially spherical shapes that make tight contact. This curved surface design eliminates the predetermined spacing distance found in flat-valve designs, allowing the washing liquid to reach and remove paint from the entire valve port area including the previously inaccessible regions, thereby achieving complete paint removal while maintaining proper valve operation
Solution Approach 2:
The patent inverts the conventional valve design approach by making both the seating section and valve seat substantially spherical rather than flat. This inversion of the traditional flat-valve geometry allows the washing liquid to access and remove paint from areas that would otherwise remain trapped due to spacing gaps, solving the paint removal problem while preserving valve functionality
2Adaptability or versatility
If multiple paint supply sections and coating apparatus are provided for different paint colors, then painting with various colors is enabled, but equipment cost and installation space are increased
Solution Approach 1:
The patent applies universality by designing a single outflow passage and single coating apparatus that can handle multiple paint colors through the paint selector valve system. The valve mechanism allows one piece of equipment to perform multiple functions (handling different paints), eliminating the need for separate dedicated systems for each paint color, thus reducing equipment quantity and installation space while maintaining versatility
Solution Approach 2:
The patent merges multiple paint supply functions into a single outflow passage and single coating apparatus. By combining what would traditionally require separate systems into one unified setup controlled by the paint selector valve, the patent reduces equipment complexity and installation space requirements while maintaining the ability to handle various paint colors
3Device complexity
If a single outflow passage is used for multiple paint colors, then equipment cost is reduced, but paint mixing occurs when switching between colors due to residual paint
Solution Approach 1:
The patent uses spherical seating surfaces to eliminate dead zones and spacing gaps where paint could remain trapped. This curved geometry ensures that washing liquid can completely access and remove residual paint from all surfaces of the valve plug and seat, preventing paint mixing when switching colors while maintaining a single outflow passage system
Solution Approach 2:
The patent implements preliminary cleaning action by designing the valve structure to allow complete paint removal before switching to the next paint color. The spherical geometry and flush mounting create conditions where washing liquid can thoroughly clean all surfaces in advance of color switching, preventing contamination and ensuring paint color purity
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
This design ensures reliable paint removal and prevents color mixing by maintaining tight sealing and allowing efficient washing of the paint selector valve, reducing equipment costs and simplifying the painting process by allowing multiple paint colors to be managed through a single outflow passage and coating apparatus.
Implementation Method 1
the valve plug blocks the fluid passage by being seated on the valve seat section
Implementation Method 2
a spherical seating section and a tapered valve seat to prevent liquid pooling and leakage
Data Source
AI summary
A piston, which is displaceable by pilot air, is provided in a main body. A valve plug, which is composed of a resin material, is connected to an end of a shaft connected to the piston. The valve plug is seated on a valve seat section of a sub-body connected to the main body, and thus the flow of the paint to a flow passage is cut off. A seating section of the valve plug, which is to be seated on the valve seat section, is formed to be substantially spherical. Further, the surface of the valve seat section is recessed and substantially spherical corresponding to the seating section.