Pneumatic Seeder Drum with Integrated Seed Return
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Solution Overview
Problem
The existing precision seed drills have a complex configuration due to the remote arrangement of discharge openings and cover devices, leading to a large unused space and complexity in seed return, which complicates the process of switching off dispensing lines and returning seeds to the supply.
Innovation Solution
The discharge line junction openings and associated cover devices are arranged in the rotating area of the separating drum, shifting the detachment and transfer area to allow seeds to fall back into the supply via gravity, eliminating the need for separate return lines and simplifying seed return, with motor-actuated shut-off means and partition walls guiding seeds back to the storage area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the discharge line junction openings and cover devices are arranged remotely from the separating drum, then the seeds can be detached and transferred, but this results in a large unused space above the seed supply and complicates the seed return process
Solution Approach 1:
The discharge line junction openings and cover devices are merged with the separating drum by arranging them in the rotating area of the drum. This integration eliminates the remote arrangement, reduces unused space in the separating housing, and simplifies the seed return process by allowing seeds to fall back into the supply directly from the drum surface.
Solution Approach 2:
The arrangement shifts from a remote, linear configuration to a radial configuration where discharge openings are positioned on the rotating surface of the drum. This dimensional change allows seeds to be detached and returned along a gravitational path directly to the seed supply, eliminating the need for complex return mechanisms.
2Ease of operation
If separate return lines and return devices are added to return seeds to the supply, then seeds can be returned to blocked discharge lines, but this increases device complexity
Solution Approach 1:
The system uses the existing rotating drum structure and gravity to enable seed return. Seeds that are detached in the rotating area naturally fall back into the seed supply without requiring additional return devices or separate return lines. The drum's rotation and the gravitational field provide the self-service mechanism for seed return.
Solution Approach 2:
The invention extracts the seed return function from the complex return device system and integrates it directly into the separating drum's operation. By positioning discharge openings on the drum surface, the return path is extracted and simplified to a direct gravitational fall back into the supply.
3Productivity
If the inlet openings of dispensing lines are positioned to receive detached seeds, then seeds can be efficiently transferred, but this may allow seeds to enter blocked lines
Solution Approach 1:
The inlet openings of the dispensing lines are positioned at specific locations on the drum surface where the local conditions (pressure difference, seed detachment timing) ensure that only properly singulated seeds are transferred. This local positioning control prevents seeds from entering blocked lines while maintaining efficient transfer to active lines.
Solution Approach 2:
The cover devices interrupt the pressure difference at the perforations before seeds enter the discharge lines, ensuring seeds are detached and singulated in advance. This preliminary detachment action ensures that only single seeds are transferred to the dispensing lines, preventing double occupancy and controlling seed distribution reliability.
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 configuration reduces the overpressure area, simplifies seed return, and prevents seeds from entering blocked dispensing lines, ensuring efficient seed distribution and storage without additional return devices, thereby optimizing the seed drill's design and operation.
Implementation Method 1
A pressure difference thus arises between the interior 7 of the separating drum 2 and the exterior 6 of the separating drum 2 in its separating region 8
Implementation Method 2
seeds to be fed to the blocked discharge lines are already detached from the drum in an area before they enter the Inlet openings of the dispensing lines arrive in which they can fall back into the seed supply solely due to gravity
Data Source
Figure 1
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AI summary
Pneumatic precision seeder with a housing comprising a seed hopper and at least one rotatably driven singulation drum, in the circumferential surface of which perforations are arranged in circular rows, a blower by means of which a pressure difference between the interior of the singulation drum and the exterior of the singulation drum can be generated, so that when the singulation drum is guided through the seed hopper, seeds adhere to the perforations on the outside of the perforated drum, wherein the housing has two spaced-apart side walls that extend parallel to the direction of movement of the drum and interact with the drum in an at least approximately sealing manner, wherein a covering device that interrupts the pressure difference applied to the perforations in order to detach the seeds from the perforations is arranged in the interior of the drum.In the area of the covering device and the perforation rows, one end of a dispensing line with its inlet opening is positioned at least approximately close to the drum surface. To optimize the arrangement of the release zone for the individual seeds, at least in the perforation rows to be deactivated, so that a simplified return of the released seeds to the seed reservoir is achievable, the inlet openings of the dispensing lines and the associated covering devices are arranged in the ascending rotation zone of the drum's singulation zone, relative to the direction of rotation.