Disc Spreader Rotary Valve Dosing for Seed Distribution Precision
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Solution Overview
Problem
Disc spreaders used for seed distribution are inefficient and imprecise, leading to reduced yield and higher seed usage due to wind interference and lack of precise dosing, making them less effective than pneumatic sowing devices, especially for small businesses.
Innovation Solution
Incorporating a cellular wheel sluice with an outlet for a collecting funnel into the dosing unit of a disc spreader, allowing for precise dosing and conversion into a seed drill, with speed-dependent control to maintain constant seed application rate, and optional blower for reliable material conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional disc spreader is used for seed distribution, then the equipment is simple and already available, but the seed distribution is imprecise and affected by wind
Solution Approach 1:
The spreading system is divided into multiple independent dosing units, each with its own rotary valve and metering mechanism. This segmentation allows precise control of seed flow to each spreading zone, eliminating the imprecise bulk distribution of conventional spreaders while maintaining manageable system complexity through modular design.
Solution Approach 2:
A rotary valve with cellular wheel sluice acts as an intermediary between the seed container and the spreading disc. This intermediary mechanism precisely meters and regulates seed flow, preventing wind interference from affecting distribution precision while adding only a single controllable component to the system.
2Productivity
If the spreading width is increased by rotating the spreading disc faster, then the coverage area increases, but the seed distribution precision decreases
Solution Approach 1:
The system incorporates electronic speed sensors and control units that continuously monitor the spreading disc rotation speed and adjust the rotary valve operation accordingly. This feedback mechanism maintains precise seed metering even when spreading width varies, as the control unit compensates for speed changes to keep application rates accurate.
Solution Approach 2:
The dosing system is designed with dynamically adjustable rotary valve speeds that can be independently controlled for each spreading zone. This allows the system to adapt seed flow rates to match varying disc rotation speeds, maintaining precision across different spreading widths without requiring a fixed operating speed.
3Measurement precision
If a pneumatic seed drill is used instead of a disc spreader, then precise seed distribution is achieved, but additional equipment costs are incurred
Solution Approach 1:
The system combines the familiar disc spreader framework with integrated rotary valve dosing units, creating a multi-functional device that delivers pneumatic-grade precision using a hybrid approach. This universality allows farmers to upgrade from simple spreaders without completely replacing equipment, reducing additional costs while achieving precise distribution.
Solution Approach 2:
The rotary valve mechanism is designed to be self-regulating through its cellular wheel sluice design, which automatically meters seed flow based on rotational speed without requiring complex external control systems. This self-service capability reduces the need for additional sophisticated equipment while maintaining precision, lowering overall system complexity.
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
Enables precise seed distribution and cost-effective conversion of disc spreaders into seed drills, reducing seed waste and additional equipment costs, while maintaining consistent application rates across varying spreading widths.
Implementation Method 1
a metering unit with a rotary valve (18), which has a rotationally symmetric cell arrangement and an outlet (14) for a collecting hopper (23), arranged below the container (61) on the base frame (11)
Implementation Method 2
the collecting hopper (23), from where the seed is distributed by (usually two) spreading vanes
Implementation Method 3
a blower (51), which ensures reliable conveyance of the spreading material through the connected hoses
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
The invention relates to a disc spreader comprising a frame consisting of a base frame (11) and an auxiliary frame (21), wherein a container (61) is secured to the base frame (11) and a spreader disc (22) is secured under the container (61) on the auxiliary frame (21), wherein, according to the invention, a dosing unit (12), preferably having a cellular wheel sluice (18), is arranged on the base frame (11) under the container (61), said dosing unit having an outlet (14) at the bottom for a collection hopper (23), wherein the collection hopper (23) is secured to this outlet (14) of the dosing unit (12) and the auxiliary frame (21) is secured on the base frame (11) by means of a quick-closure (15, 25). In this way, it is possible to provide a distributer (32, 32a) which can be connected to the outlet (14) of the dosing unit (12) after removal of the auxiliary frame (21) and the collection hopper (23), such that the disc spreader can be converted into a seeder.