Corn and soybean dual-purpose air pressure type high-speed precision seed-metering device

By adopting a combined structure of seed pooling baffle and U-shaped groove suction holes in the pneumatic seed discharger, the problem of large fluctuations in plant spacing caused by seed bounce during high-speed operation is solved, and high-speed precision sowing of corn, soybean and other crops is achieved, improving seed discharge performance and operating efficiency.

CN119866739AActive Publication Date: 2025-04-25CHINA AGRI UNIV
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Patent Information

Application Number
CN202510324480.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-19
Publication Date
2025-04-25
Estimated Expiration
2045-03-19

AI Technical Summary

Technical Problem

When the existing pneumatic seed dischargers are operating at high speed, the seeds bounce in the seed conduit tube causes large fluctuations in the plant spacing, and the seeding performance of domestic pneumatic seed dischargers has not yet reached the needs of improvement.

Method used

A pneumatic high-speed precision seed discharger for corn and soybeans is designed, using a combined structure of seed pooling baffle and U-shaped trough suction holes. The seeds are lifted through the seed pooling baffle, so that the seeds are close to the U-shaped trough suction holes, and the population is stirred by chamfered U-shaped trough suction holes to enhance the population fluidity, and the consistency of the seed placement is ensured through the gas barrier block and the guide seed suction port.

Benefits of technology

The seed filling performance and seed fluidity of the seed discharger are improved, and high-speed sowing of corn, soybeans and other crops are realized. It is suitable for field plots with flat terrain, ensuring small seed damage, stable plant distance and high operating efficiency.

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Abstract

The invention discloses a corn-soybean dual-purpose air pressure type high-speed precision seed sowing device. The seed metering device comprises a front shell, a seed metering disc, a shaft and a rear shell, a seed filling and carrying space is defined by a gradually-shrinking speed-increasing baffle of the front shell, the upper circumferential side wall of the front shell, a seed gathering baffle of the front shell, a seed metering pipe of the front shell, the rear shell and a front end plate of the front shell, and the seed metering disc fixed to the shaft periodically rotates in the seed filling and carrying space; a plurality of U-shaped groove suction holes are formed in the plate surface of the seed-metering plate; the working sequence of the seed-carrying working cycle of the U-shaped groove suction holes is as follows: the seed-gathering baffle, the upper peripheral side wall, the gradually-shrinking speed-increasing baffle and the seed-metering pipe; the seed gathering baffle is used for lifting and gathering the population; the seed pushing plate is fixed to the front shell, a main body of the seed pushing plate is a grid plate, and the grid plate is used for separating seeds in the seed filling and carrying stage and the seed falling stage in the seed filling and carrying space. Overall lifting of the population position is achieved through the seed gathering baffle, seeds in the middle layer of the population are made to be close to suction holes of the seed metering disc, and the seed filling performance of the seed metering device is greatly improved.
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