Centrifugal spreader for granular materials

The centrifugal spreader addresses the metering effect and dosage control issues by using a guide with optimized channels and a throttling member with adjustable openings, achieving precise and uniform distribution for both fertilizers and slug pellets.

WO2025062352A1 Publication Date: 2025-03-27MASCHIO GASPARDO
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Patent Information

Application Number
PCT/IB2024/059150
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-22
Filing Date
2024-09-20
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

Centrifugal fertilizer spreaders face challenges with the metering effect, where variations in flow rate lead to uneven distribution, and the quality of spreading is compromised due to turbulence affecting the fertilizer column shape. Additionally, these spreaders struggle to accurately control low dosages required for granular toxins like slug pellets without modifying the metering system.

Method used

The centrifugal spreader incorporates a guide with a main channel and secondary channels to minimize the metering effect and maintain control over the fertilizer's falling footprint. The guide's dimensions are optimized to prevent material loss and ensure uniform distribution, while a throttling member with adjustable openings allows for precise control over dosages, including low dosages for slug pellets.

Benefits of technology

This configuration reduces or eliminates the metering effect, ensures precise control over dosages, and maintains the quality of spreading for both high and low dosages, including slug pellets, without requiring modifications to the metering system. The spreader can be retrofitted and operates effectively with automatic adjustments.

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Abstract

A centrifugal spreader (1) for granular materials comprises at least one metering member (2) with a dispensing opening (4) which can be throttled by adjustment means (9) to vary the flow rate of material falling to at least one corresponding centrifugal distributor (12) and a material guide (15) interposed between said dispensing opening and said centrifugal distributor. The guide includes a main channel (22) extending between the adjustment means and a material falling zone on the centrifugal distributor. The adjustment means potentially causing the opening of a dispersion passage (28) for the material during the throttling of the dispensing opening. The guide comprises at least one secondary channel (25) which is provided radially externally with respect to the main channel and which opens inside the main channel to collect material which is dispensed into the dispersion passage (28) in order to convey it into the main channel (22).
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