Search

BR-122025010788-A2 - INPUT DOSER

BR122025010788A2BR 122025010788 A2BR122025010788 A2BR 122025010788A2BR-122025010788-A2

Abstract

The present invention relates to input metering devices for use in agricultural machinery and implements. More specifically, the invention relates to fertilizer, fine grain and/or particulate product metering devices used in planting rows for soil preparation, attachable to agricultural machinery and implements such as seeders-fertilizers, planters-fertilizers and chemical corrective distributors. The present invention discloses an input metering device comprising a metering housing equipped with an inlet nozzle (3) and an outlet nozzle (4); a rotating metering element (5); a scraper (7) associated with the inlet nozzle (3), the scraper (7) having an edge (8).

Inventors

  • JOSÉ ROBERTO DO AMARAL ASSY
  • LEANDRO BANNWART AMBIEL
  • Nilson Sanches
  • Silvio DE LACERDA
  • LEONARDO VIEIRA DE ANDRADE
  • LINO MORI MENZATO
  • Ronaldo Marques

Assignees

  • José Roberto do Amaral Assy

Dates

Publication Date
20260317
Application Date
20220630

Claims (9)

  1. 1. INPUT DOSER (1), comprising: a doser housing fitted with an inlet nozzle (3) and an outlet nozzle (4); characterized by comprising a rotating dosing element (5); a scraper (7) associated with the inlet nozzle (3), the scraper (7) being fitted with an edge (8).
  2. 2. INPUT DOSER (1), according to claim 1, characterized in that the scraper (7) is provided with an edge (8) whose shortest distance from the outermost region of the edge of the scraper (8) to the outermost region of the rotating dosing element (10) is at most 4.0 mm.
  3. 3. INPUT DOSER (1), according to claim 1, characterized in that the scraper (7) is external to the rotating dosing element (5).
  4. 4. INPUT DOSER (1), according to claim 3, characterized in that the scraper (7) is a replaceable part.
  5. 5. INPUT DOSER (1), according to claim 1, characterized in that the scraper (7) is associated with a down chute (12).
  6. 6. INPUT DOSER (1), according to claim 5, characterized in that the scraper (7) is made of a material more resistant to abrasion than the down chute (12).
  7. 7. INPUT DOSER (1), according to claim 5, characterized in that the distance between the edge of the scraper (8) and the outermost region of the rotating dosing element (10) is less than or equal to the distance between the down chute (12) and the outermost region of the rotating dosing element (10) in the operating region of the scraper (11).
  8. 8. INPUT DOSER (1), according to claim 7, characterized in that the shortest distance between the outermost region of the rotating dosing element (10) and the edge of the scraper (8) is continuous.
  9. 9. INPUT DOSER (1), according to claim 7, characterized in that the edge of the scraper (8) is parallel to the surface of the outermost region of the rotating dosing element (10).

Description

FIELD OF THE INVENTION [001] The present invention relates to dosing devices for inputs applied in agricultural machinery and implements. [002] More specifically, the invention relates to fertilizer, fine grain and/or particulate product dispensers used in planting rows for soil preparation, attachable to agricultural machines and implements such as seeders-fertilizers, planters-fertilizers and chemical corrective distributors. BACKGROUND OF THE INVENTION [003] Agriculture is of extremely notable importance to the economic foundations of countries. Constant technological evolution in this area promotes improvements in planting methods, innovative equipment, and diversified products that provide farmers with different tools to increase their production. [004] Soil preparation is an essential step for planting, especially with regard to the proper application of inputs. In addition to substantially improving productivity, the correct dosage of these materials ensures less waste of resources. [005] Among the known devices to assist in the application of inputs are fertilizer dispensers, commonly called fertilizer dispensers or input dispensers. These devices facilitate the more precise dosing of fertilizers by allowing the treatment of large planting areas with agility. Because they can be attached to agricultural implements, such as planter-fertilizers, fertilizer dispensers guarantee a theoretically homogeneous distribution of inputs relative to the speed of the implement. [006] Fertilizer dispensers that use augers are easily found in patent documents. In general, these types of dispensers feature a technology consisting of a helix wrapped around a longitudinal shaft, below an inlet region, in which the rotation of said shaft moves the helix, allowing the applied material to be transported to a target outlet. [007] Document MU 8602761-1 discloses an example of a fertilizer dispenser with a conventional auger, providing in its arrangement adaptations against jamming or interruptions for wet and compacted fertilizers, inconveniences already known in the state of the art. This dispenser does not present a specific solution for larger and more rigid hardened fertilizer portions, which, together with the rotation of the auger, can wear down internal elements of the dispenser. [008] There are also known screw feeders with solutions aimed at reducing clogging and dispersion of fertilizers in the internal mechanisms, as presented in invention patent PI0205032-3. In the cited document, a coating with a vertical wall is disclosed, which has grooves to prevent fertilizer from entering the internal bearing. [009] Although functional, the use of a screw conveyor as an alternative for dosing particulate materials can present some drawbacks, the main one being related to the pitch of its helix. [010] The auger has a pitch that generates a significant discharge only for a fraction of its complete rotation. This phenomenon generates intermittencies that impair the uniformity of planting, especially when the agricultural implement operates at reduced speed, since the rotation speed of the helical actuator varies directly and proportionally to the speed of the implement. For a technician in the field, such inconsistencies in flow rate are also called "pulses" or "gulps". [011] There are also known particulate matter metering devices that use pneumatic technology. Unlike auger metering devices, these devices perform the metering vertically to the movement of the agricultural implement, through vertical rotors, and with the aid of a positive pressure source, which directs the metered input portions through ducts to one or more planting rows. [012] In one of the known forms of using pneumatic input dosers, distribution is done through a single centralized rotor that performs dosing for more than one planting row. In this implement configuration, the transport of inputs to the planting rows is homogenized by the action of the pneumatic flow in the ducts, minimizing the intermittencies generated by the dosers. [013] An example of a patent document that discloses a pneumatic input dispenser is WO2017/061942, which discloses a distribution of inputs from a vertical dispenser, distributed by a positive pressure source through a central duct. Document WO2017/061942 further discloses a vertical rotor for an agricultural implement dispenser comprising a sealing flap, necessary to prevent leakage of positive pressure in the direction opposite to the normal flow of inputs and to ensure ambient pressure in the reservoir above the dispenser. [014] Also known in the state of the art is document US2018031047, which discloses a vertical pneumatic metering device for fertilizers or seeds. More specifically, the document presents a vertical rotor equipped with pre-tensioned fins against the inner surface of the metering device housing, acting as sealing elements, and preventing the escape of positive pressure to the seed reservoir. [015] Documen