Negative pressure seed sucking and mechanical seed cleaning type precise seed-metering device and seed-metering method thereof

Abstract

The invention discloses a negative pressure seed sucking and mechanical seed cleaning type precise seed-metering device and a seed-metering method thereof. The seed-metering device comprises an airway system, a circuit system and a sowing system, wherein the airway system is composed of a negative pressure cavity, a seal ring, a middle pipe, a two-position three-way electromagnetic valve, a seed sucking branch pipe and a seed sucking nozzle. The circuit system is composed of a combined type electric brush ring, a negative electrode slide ring guide rail, a main control slide ring guide rail and a two-position three-way electromagnetic valve. The sowing system comprises a seed chamber, a sowing chain wheel, a transmission chain, a flexible seed baffle, a brush chain wheel, a brush and a flow limiting plate. The electromagnetic valves are installed on a supporting plate and connected with the middle pipe, wires of the electromagnetic valves are connected with the combined type electric brush ring, and electric brushes make contact with the slide ring guide rails. The supporting plate rotates to drive the combined type electric brush ring for supplying power to the electromagnetic valves to rotate, the electric brushes installed on the combined type electric brush ring make contact with a conductive rail and a non-conductive rail in the main control slide ring guide rail, and therefore the conversion of the on and off of the electromagnetic valves is realized, the electromagnetic valves act, and the sowing function is realized; the brush chain wheel drives the brush to rotate, and the mechanical seed cleaning function is realized.

Description

technical field [0001] The invention relates to precision seeding of grains and is mainly used in rice direct seeding machines, in particular to a negative pressure seed suction mechanical seed clearing type precision seed metering device and a seed metering method thereof. Background technique [0002] The sowing part (seeding device) is the core component of the rice direct seeding machine. Its structure and sowing performance have a direct impact on the sowing quality of the seeding machine, and its performance is directly related to the sowing quality and efficiency. have an important role. [0003] At present, the commonly used seed metering devices at home and abroad can be divided into two categories: mechanical type and pneumatic type according to the working principle. The mechanical seed metering device has the advantages of relatively simple structure and low cost, but due to its strict requirements on the shape of the seeds, and the phenomenon of seed damage due...

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Problems solved by technology

[0004] The air-suction seed metering device has a high application prospect. However, the current air-suction seed metering device is still unable to coordinate the contradiction between the seeding speed and the seeding quality. Although the damage to the seeds can be reduced under the air suction condition, The sowing accuracy can also be solved by using various seed guide devices, but the sowing speed still needs to be greatly improved, and the problem that the wear of the sowing device affects the air chamber and the overall work needs to be solved urgently

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