Non-Concentric Gate Valve for Pneumatic Seed Distribution
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Solution Overview
Problem
Existing pneumatic distribution machines fail to achieve even distribution of material to non-blocked distribution lines due to the concentric design of the gate valve, leading to uneven material distribution when blocking off multiple inlet openings.
Innovation Solution
A non-concentric gate valve design with a circular cylindrical section adjacent to the feed line, accompanied by non-circular surface sections that end in flat surfaces, and made of air-permeable or sieve-like material to ensure even distribution and air escape, with interchangeable mesh sizes for different materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a concentric gate valve design is used, then the structure is simple and easy to manufacture, but the material distribution to non-blocked lines becomes uneven
Solution Approach 1:
The patent applies asymmetry by designing the gate valve with a non-concentric cylindrical section that is offset relative to the annular distribution chamber. This asymmetric positioning creates different flow path lengths and resistance characteristics for material flowing to different distribution lines, compensating for the uneven distribution that would otherwise occur when lines are blocked. The offset design allows the gate valve to actively balance material flow to active lines while maintaining structural simplicity.
2Reliability
If the gate valve completely blocks off a region of the distribution space, then the separation of blocked and non-blocked lines is sharp, but excess conveying air cannot escape
Solution Approach 1:
The patent employs porous materials by making the gate valve air-permeable while maintaining its blocking function for solid material. The gate valve is designed with air-permeable material or sieve-like material that has openings smaller than the seed grains. This allows the gate valve to completely block off distribution lines for solid material while simultaneously allowing excess conveying air to pass through, preventing air accumulation and maintaining pneumatic system functionality.
Solution Approach 2:
The patent applies local quality by giving different parts of the gate valve different properties: the main body uses air-permeable or sieve-like material for air passage, while the outer corner areas use flat surface elements for complete material blocking. This localized differentiation allows the gate valve to simultaneously achieve sharp line separation for solid material and provide air escape paths, resolving the contradiction between complete blocking and air venting.
3Reliability
If the sieve mesh size is reduced to prevent seed grain escape, then seed retention is improved, but air permeability is reduced
Solution Approach 1:
The patent resolves this contradiction by using porous materials with carefully controlled pore sizes that are smaller than seed grains but large enough to allow air passage. The sieve-like material or air-permeable material is selected to have mesh sizes that selectively retain solid material while permitting gas flow, thus simultaneously achieving seed retention and air permeability.
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 non-concentric gate valve design ensures even distribution of material to non-blocked lines by optimizing the shape and curvature, preventing seed grain escape and allowing excess air to escape, thereby achieving uniform seed distribution across the distribution chamber.
Implementation Method 1
The shut-off slide is designed to be air-permeable in order to ensure that the excess conveying air supplied is removed through the supply line in a simple manner
Implementation Method 2
the sieve-like material is a sieve, the mesh size of which is smaller than the granular material to be discharged
Data Source
Figure 1~5
Figure 6
Figure 7~8
AI summary
The invention relates to a pneumatic distributor machine for seed, fertilizer, and the like, having the following features: 1.1. a distributor head (1) defining an ring-shaped distributor chamber (5); 1.2. at least one feeder line (2) terminates in the distributor head; 1.3. distribution lines (4) are connected to the distributor head, spaced apart from the feeder line; 1.4. at least one shut-off valve (6); 1.5. the shut-off valve can be inserted in the ring-shaped distributor chamber, and can be moved therefrom such that in its shut-off position, the lateral ends of the shut-off valve are arranged spaced apart from the inlet openings of the distribution lines and/or to the side walls of the distributor chamber so that air from the feeder line to the inlet openings of the blocked distribution lines passes through the space between the lateral ends of the shut-off valve and the adjacent side walls of the distributor chamber. In order to provide a simple remedy, it is proposed that the shut-off valve is shaped as a non-concentric cylinder segment relative to the ring-shaped distributor chamber.