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

Abstract

The invention discloses negative pressure seed sucking and positive pressure 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. The airway system is composed of an air suction way, a seal ring, a negative pressure pipe, a positive pressure 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 is composed of a seed chamber, a flexible seed baffle and a flow limiting plate. The two-position three-way electromagnetic valve 7 is installed on the supporting plate and connected with the other two-position three-way electromagnetic valve, a wire of the two-position three-way electromagnetic valve 7 is connected with the combined type electric brush ring, and electric brushes make contact with the slide ring guide rails. A bottom 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 negative pressure seed sucking function and the positive pressure seed cleaning function are realized.

Description

Technical field [0001] The invention relates to precision seeding of grains, which is mainly used for direct-seeding rice machines, and specifically is a precision seed metering device with negative pressure suction and positive pressure cleaning. Background technique [0002] As the core component of the rice direct seeding machine, the seeding component (seeding device) has a direct impact on the seeding quality of the planter by its structure and its seeding performance. Its performance is directly related to the quality and efficiency of the seeding, and it is the development of the direct seeding technology of rice Has an important role. [0003] At present, the commonly used seed metering devices at home and abroad can be divided into two categories: mechanical and pneumatic according to their working principles. Mechanical seed metering device has the advantages of relatively simple structure and low cost. However, due to its strict requirements on seed shape, the phenomeno...

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Problems solved by technology

[0004] Pneumatic seed metering devices have high application prospects. However, the current pneumatic seed metering devices are still unable to coordinate the contradiction between seeding speed and seeding quality. Although the damage to seeds can be reduced under pneumatic conditions, the sowing accuracy can The use of various seed guiding devices can also be solved, but the seeding speed still needs to be greatly improved, and the problem that the wear of the seeding device affects the air chamber and the overall work needs to be solved urgently

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