Air-blast seed metering device for large-sized seeds

By designing an air-suction seed metering device, a negative pressure and magnetic clamping mechanism is used to achieve precise seeding of large-diameter seeds, solving the problems of high labor intensity, low efficiency and poor stability in existing technologies, and improving sowing efficiency and seed survival rate.

CN116671316BActive Publication Date: 2026-05-08KUNMING UNIV OF SCI & TECH
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Patent Information

Application Number
CN202310823720.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-06
Publication Date
2026-05-08
Estimated Expiration
2043-07-06

AI Technical Summary

Technical Problem

Existing technologies for sowing large-diameter seeds involve high labor intensity and low efficiency, and cannot guarantee consistent plant spacing and sowing depth. Mechanical sowing is prone to damaging seeds and has poor stability, resulting in uneven emergence, high density, and low yield.

Method used

Design a pneumatic seed metering device, including a seed metering shell, a seed metering disc, a drive mechanism, and a negative pressure mechanism. The adsorption and release of seeds are controlled by the negative pressure switching, and precise seed metering is achieved by combining a magnetic clamping mechanism. The device adopts a detachable structure for easy maintenance.

Benefits of technology

It enables precise sowing of large-diameter seeds, improves germination and survival rates, reduces labor costs, increases sowing efficiency, avoids seed accumulation and collision, and ensures seed mobility.

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Abstract

The present application relates to the technical field of seeding equipment, and discloses an air-suction seed metering device for large-diameter seeds; a seed metering disc is installed in a seed metering shell and divides the seed metering shell into an air chamber and a seed area; the seed metering disc is connected to a driving mechanism; a negative pressure mechanism is connected to one end of the air chamber along the seed metering shell; the negative pressure mechanism is used to generate negative pressure in the air chamber; the driving mechanism is used to drive the seed metering disc to rotate; when the seed metering disc rotates to the area of the air chamber, the negative pressure is connected to the seed area; when the seed metering disc rotates to the area other than the air chamber, the negative pressure is disconnected; the present application can facilitate accurate positioning and seeding of large-diameter seeds; by changing the on-off of the negative pressure, effective adsorption of the large-diameter seeds and fixed-position seeding are realized, and seed cleaning is performed in the process, which ensures the flowability of the large-diameter seeds, avoids seed accumulation and arching, reduces the collision and force between the seeds, improves the seed filling efficiency, further ensures the germination rate and survival rate of the large-diameter seeds, and is high in seeding efficiency and low in labor cost.
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