Non-Concentric Gate Valve for Pneumatic Distributor
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Solution Overview
Problem
Existing pneumatic distribution machines with concentric gate valves fail to ensure even distribution of material to non-blocked distribution lines due to uneven shut-off mechanisms, leading to inefficiencies in material distribution.
Innovation Solution
A non-concentric gate valve design with a slide section adjacent to the supply line featuring a curvature matching the circular contour of both the supply line and distribution space, accompanied by opposite curvature sections on either side, and a wavy contour resembling a deep-drawn soup plate, ensures even distribution by optimizing the shut-off mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a concentric gate valve design is used to shut off distribution lines, then the shut-off mechanism is simple and easy to manufacture, but the material distribution to non-blocked lines becomes uneven
Solution Approach 1:
The gate valve transitions from a concentric (symmetric) design to an asymmetric design where the slide surface is offset from the center of the distribution space. This asymmetric configuration compensates for the uneven flow distribution by creating differential flow paths that balance material delivery to all active distribution lines.
Solution Approach 2:
Different regions of the gate valve slide surface are positioned at different distances from the distribution space center. The slide surface includes regions closer to and farther from the center, creating localized flow adjustments that collectively achieve uniform material distribution across all non-blocked lines.
2Productivity
If the gate valve is pushed into the distribution space to block lines, then the working width can be reduced, but the separation between blocked and unblocked areas becomes insufficient
Solution Approach 1:
The asymmetric slide surface creates an uneven shut-off profile that extends further into certain regions of the distribution space. This provides a sharper demarcation between blocked and unblocked areas, preventing material leakage into blocked line inlet openings while maintaining the ability to reduce working width.
3Device complexity
If a simple cylindrical gate valve is used, then the device complexity is low, but the material flow equalization is insufficient
Solution Approach 1:
The gate valve maintains a simple cylindrical overall structure but introduces local variations in the slide surface positioning. The slide surface is offset from the center by a specific distance, creating local flow path differences that equalize material distribution without requiring complex multi-component construction.
Data Source
Figure 1
Figure 2~3
AI summary
The machine has distribution lines (4) connected to a distributor head (1) and spaced apart from a feeder line (2). A shut-off valve (6) is inserted into a ring-shaped distributor chamber (5) and made of air permeable material or sieve-like material. Lateral ends (9) of the valve are arranged and spaced apart from inlet openings of the distribution lines and/or side walls (7) of the chamber such that air from the feeder line passes to the openings through a space between the lateral ends and the side walls. The valve is shaped as a non-concentric cylinder segment relative to the chamber.