A Pneumatic Shooting Type Seed Meter for Direct Seeding of Rice

Abstract

The invention discloses a pneumatic seed-shooting type direct-seeding seed metering device for rice, which comprises a seed sorting mechanism, a seed guiding mechanism and a pneumatic seed shooting mechanism; Set and rotatable seed wheel; the seed guide mechanism includes a seed protection box arranged under the seed box, a number of first seed guide tubes communicated with the seed protection box and arranged at intervals, and a second guide tube communicated with the first seed guide tube Seed pipes; the seed row wheels are arranged in the seed protection box, and the ends of each of the first seed guide tubes located on one side of the seed protection box are arranged in one-to-one correspondence with each seed row wheel; the pneumatic seed injection mechanism includes an end extension The exhaust pipe that enters the first seed introduction pipe, the positive pressure air chamber that is arranged on the seed box and supplies air for the exhaust pipe, and the air chamber that is arranged on the first seed introduction pipe and is located in the first seed introduction pipe facing the exhaust pipe port, photoelectric sensor for detecting seeds. The invention can realize the seed burrowing into the soil and has the characteristics of adjustable sowing row number and row spacing, high sowing precision, small volume and the like.

Description

technical field [0001] The invention relates to the technical field of agricultural seeding equipment, in particular to a pneumatic seeding type direct-seeding seed metering device for rice. Background technique [0002] Due to the light and simplified characteristics of modern rice farming, direct seeding of rice has developed very rapidly in my country, and has gradually become one of the important methods of mechanized rice planting. At present, most of the rice direct-broadcasting devices cannot implement seeds into the soil, which causes the seeds to be eaten by birds and washed away by water, and the current rice direct-broadcasting devices are bulky and inflexible. [0003] For example, the patent specification whose notification number is CN104919949B discloses a set-row type rice direct seeding device, including a cross-shaped frame, a reducer installed on the front end of the cross-shaped frame longitudinal beam, and a fuel-powered engine integrated with the reduce...

AI Technical Summary

Problems solved by technology

At present, most of the rice direct seeding devices cannot realize the seeds into the soil, resulting in the seeds being eaten by birds and washed away by water, and the current rice direct seeding devices are bulky and inflexible

[0003] For example, the patent specification whose notification number is CN104919949B discloses a set-row type rice direct seeding device, including a cross-shaped frame, a reducer installed on the front end of the cross-shaped frame longitudinal beam, and a fuel-powered engine integrated with the reducer. Walking wheels; the sorting mechanism at the bottom of the seeding mechanism, the seeding mechanism at the bottom of the seed box and the seed box for holding seeds erected on the middle section of the frame; A plurality of seed guide tubes, the plurality of seed guide tubes are connected to the sorting mechanism, and the distance between the ports of the multiple seed guide tubes corresponds to the sowing row spacing; the seed box, the seed arrangement, and the sorting mechanism Arranged vertically from top to bottom, and the upper and lower interfaces are opposite. The seed drop port of the seed box is connected to the upper opening of the seed metering mechanism, and the seed metering bucket of the seed metering mechanism is connected to the inlet of the seed sorting mechanism; The two sorting hole tubes are respectively connected with a plurality of seed guide tubes one by one; the sorting mechanism is composed of a sorting cone and a cover covering it; the sorting cone is composed of a concentric cone and a center The base at the lower end of the cone is formed, and the part where the base is larger than the cone is provided with the sorting hole tube; the above scheme adopts centralized seeding, and then disperses to each seed guide tube, which can realize multi-row sowing, but cannot realize seeding. Into the soil, and due to the different lengths of the seed guide tubes, the seeds fall by their own gravity, which may lead to large sowing errors

[0004] Another example is that the patent specification of CN108476667B discloses a kind of pneumatic type rice hole direct seeding centralized seeding device, comprising a seed box, a seed feeding conduit, a left end cover, a left bearing end cover, a transmission shaft, a left bearing seat, a support, Observation port, upper shell, seed introduction pipe, lower shell, rib plate, upper air intake pipe, drum, lower air intake pipe, seed unloading plate, baffle plate, right end cover, right bearing seat, right bearing end cover and seed layer adjustment plate; The seed box is installed on the seed feeding conduit, the left end cover is equipped with a left bearing seat, and the left bearing end cover is installed on the left bearing seat; the left end cover is connected with an upper shell and a lower shell; the right end cover is installed with a The right bearing seat, the right bearing end cover is installed on the right bearing seat, and the right end cover is provided with a fan-shaped waist hole for discharging the gas in the drum; the transmission shaft is installed on the left bearing seat and the right bearing seat, and the The drive shaft is equipped with a roller; the above scheme uses a positive pressure airflow to complete the seed filling, seed protection, and seed discharge processes, but the number of sowing rows and row spacing cannot be adjusted, and if the number of sowing rows is to be increased, the volume of the seeding device will be larger

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