Seed Distribution Machine with Bypass Shutoff for Single-Grain Precision
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Solution Overview
Problem
Current distribution machines struggle to achieve single-grain delivery of granular materials with a large number of grains per unit area, especially for wheat, while maintaining even longitudinal and lateral distribution, and they lack efficient section control to prevent overlaps in cultivated areas.
Innovation Solution
A distribution machine design featuring a storage container, dosing device, air conveying unit, distributor tower with a riser pipe and mushroom-shaped distributor head, and a shut-off device with a bypass system, allowing for independent operation of outlets and maintaining consistent air flow and pressure levels, enabling precise control over grain distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If pneumatic distribution machines are used for sowing materials with large number of grains per unit area, then grain distribution capacity is improved, but single-grain delivery and longitudinal distribution quality deteriorate
Solution Approach 1:
The distribution machine divides the grain flow into multiple separate streams using a distributor head with multiple outlets, each serving a specific sowing coulter. This segmentation allows each outlet to deliver grains individually while maintaining high overall distribution capacity
Solution Approach 2:
A metering device is introduced as an intermediary component between the storage container and the distributor head. This metering device controls the grain flow rate to ensure single-grain delivery precision while maintaining the capacity to handle large quantities of grains per unit area
2Adaptability or versatility
If outlets are completely closed for section control, then overlap prevention is improved, but flow properties in distribution tower change causing increased material to unclosed outlets
Solution Approach 1:
The bypass connection is pre-established between the return area and the distribution tower, allowing air flow to be redirected before outlets are closed. This preliminary arrangement prevents flow property changes in the distribution tower when outlets are closed for section control
Solution Approach 2:
When outlets are closed for section control, the air flow that would have gone to those outlets is redirected through the bypass connection back to the distribution tower. This recovers the air flow and maintains proper flow properties, preventing material accumulation at unclosed outlets
3Adaptability or versatility
If passage cross section is adjusted for section control, then outlet closure capability is improved, but adjustment inertness causes conditional suitability for section control
Solution Approach 1:
The shut-off function is extracted from the passage cross-section adjustment mechanism and implemented as a separate bypass connection. This allows outlets to be closed without adjusting the passage cross-section, eliminating the inertness problem and enabling rapid response for section control
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 machine achieves improved longitudinal distribution and section control, allowing for single-grain delivery and precise distribution of granular materials, independent of the number of sowing coulters or working width, while preventing material accumulation and ensuring even plant spacing.
Implementation Method 1
In a line system in which an air volume flow prevails, which is generated by an air conveying unit, the material to be distributed is conveyed within the distribution machine by this volume flow of air for distribution
Implementation Method 2
A distribution material air volume flow is thus created in the line system. This volume flow of air for distribution is fed to a distribution tower, the distribution tower having a riser pipe for receiving the volume flow of distribution material air, and a distributor head adjoining the riser pipe. In this distributor head, the one distribution material air volume flow is divided into a plurality of distribution material air volume flows, corresponding to the number of outlets
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
Distributing machine (10) and method for granular material, in particular for seeds, fertilizer, or the like. The distributing machine (10) comprises a storage container (14) and a downstream metering device (32) for metering the material into an air volume flow generated by an air conveying unit (36), a distribution tower (38) with a riser pipe (40) and a subsequent distribution head (42), in which the single air volume flow of the material is divided into a plurality of air volume flows corresponding to a number of outlets (44) distributed around its circumference. Each plurality of seed coulters (20) for depositing the material is assigned a singulation device (48), by means of which the material conveyed by a seed line (46) is homogenized or singulated and then deposited in the soil via a seed tube (24) assigned to the seed coulter (20).Between the outlet (44) of the distributor head (42) and the singulation device (48) a shut-off device (50) with a diverter (52) is arranged, by means of which the volume flow of distributed material air is directed towards the seed line (46) or towards a return area (54).