Elastic suction nozzle pneumatic precision seed meter

Abstract

The invention discloses a pneumatic type precise seed metering device with an elastic suction nozzle. The seed metering device comprises a seed obtaining wheel shaft which is arranged in a seed box, one end of the seed obtaining wheel shaft extends out of the seed box and then is connected with a seed obtaining driving wheel, the other end of the seed obtaining wheel shaft is provided with a seed obtaining wheel, tooth groove structures are uniformly arranged on the seed obtaining wheel; a seed obtaining opening is formed in the seed box on the upper side of the seed obtaining wheel, the seed box body corresponding to the seed obtaining opening extends towards the outer side to form a seed discharging working channel; a seed discharging pipe, a positive pressure butt joint port and a negative pressure butt joint port are formed at the bottom of the seed discharging working channel, a negative pressure connection channel is formed on the negative pressure butt joint port; a seed discharging piston column is arranged in the seed discharging working channel, the inner cavity of the seed discharging piston column is hollow to form an air inflation working cavity, and the bottom of the air inflation working cavity is provided with a positive pressure inlet and a negative pressure inlet; the front end of the seed discharging piston column is connected with the elastic suction nozzle, a spring sleeves the rear end of the seed discharging piston column and then the rear end of the seed discharging piston is sealed by a movable end plate; and a working cam is arranged on the outer side of the movable end plate. During the seed obtaining process, the air inflation working cavity communicates with a negative pressure air source, the positive pressure air source is disconnected, and when the seed is discharged, the air inflation working cavity communicates with the positive pressure air source, and the negative pressure air source is disconnected.

Description

technical field [0001] The invention relates to a seeder for agricultural planting, in particular to an elastic suction nozzle pneumatic precision seed metering device which can be used for precise seed metering of crop seeds with different particle sizes. Background technique [0002] The seed meter is the key component of the seeder, and the performance of the seed meter is the key factor affecting the quality of the seeder. The precision seed metering device can realize the precise seeding operation of single seeds. On the one hand, it can reduce the amount of seeds used in the field and save the cost of seeds; on the other hand, it can reasonably arrange the spacing of crops in the field, make full use of water, light, and heat resources, and increase crop yield; It can also reduce labor costs for field thinning operations and increase planting benefits. Therefore precise seeding is the key technical problem of existing planter. [0003] The existing seed metering devi...

AI Technical Summary

Problems solved by technology

However, the opening size of the air-suction seeding process, the size of the negative pressure field and other factors have a great influence on the adsorption capacity of the seeds. Therefore, problems such as insufficient suction and blockage of the suction holes often occur, which affect the quality of the work, and have complex shapes and irregular shapes. The adsorption capacity of seeds is reduced, so it is necessary to design a more reliable and versatile precision seed meter

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