Air power collecting and discharging type precision seed sowing device

Abstract

The invention relates to an air power collecting and discharging type precision seed sowing device, which is characterized by comprising a shell, a sealing cover plate, a seed sowing roller, a pressure relief wheel, a seed bed screen, a seed cleaning shifting finger, a seed guiding pipe, an impurity collecting plate and a seed stopping plate, wherein the shell is connected with the sealing cover plate by virtue of bolts, the seed sowing roller is arranged in the shell to form an operation air chamber, an air supply chamber and a seed chamber, the seed chamber is internally provided with an air supply pipe, the seed bed screen is arranged at a critical position of the air supply chamber and the operation air chamber, and the air supply chamber provides air flow for the operation air chamber by virtue of the seed bed screen and the air supply pipe; the seed cleaning shifting finger is arranged in the operation air chamber, is close to the roller in a gap and is in an L shape, a shorter side of the seed cleaning shifting finger is in a right trapezoid shape, and relative position between a bevelled edge of the trapezoid and a seed attaching hole can be adjusted by virtue of a seed cleaning shaft fixedly connected with the shorter side; the pressure relief wheel is arranged inside the seed sowing roller and is close to the interior of the roller by virtue of a tension spring; and the inlet of the seed guiding pipe is close to the roller in the gap and is dead against a contact point of the pressure relief wheel and the roller. The precision seed sowing device realizes centralized precision seed sowing, seed attaching pressure difference and a seed sending air flow are provided by virtue of a positive pressure system, a seed layer is disturbed by utilizing the air flow, and seed filling probability is improved. The precision seed sowing device is applicable to precision seed sowing of large-row-spacing crops such as corn and soybean.

Description

technical field [0001] The invention relates to a seed metering device in the field of agricultural machinery, in particular to a pneumatic collection and row type precision seed metering device. Background technique [0002] Most of the current precision seed metering devices are "one device and one line". The structure of the seeder is bloated, and the adjustment in the field is cumbersome. Moreover, the seed metering device and the ditching soil covering device are fixed to the profiling mechanism, and the seed metering device vibrates greatly, which affects the work. stability. The collection and row seed metering device can realize "one device with multiple rows". The seeder has a compact structure, high seeding efficiency, convenient field adjustment, and meets the requirements of high-speed and wide-width operations. It is an advanced seeding method. At present, most of the pneumatic seed metering devices are air-flow seed drills, which cannot achieve precise sowing....

AI Technical Summary

Problems solved by technology

At present, most of the pneumatic seed metering devices are air-flow seed drills, which cannot achieve precise sowing

The existing drum-type collector adopts negative pressure seed suction, positive pressure seed delivery or scraping seed scraping for seed discharge, which can only achieve precise sowing of small seeds such as rape and sugar beet; its seed filling performance is poor, and a seed disturbance device is required; Seed roller hole spacing and line spacing must be the same, making it impossible to achieve wide-width operations

The pneumatic centralized seed metering device with the patent number CN201110357747.9 can achieve precise seeding by adopting the method of negative pressure suction and positive pressure delivery of the horizontal disk, but the structure is relatively complicated and a double fan system is required

Some foreign collection and row seeders that can achieve precision sowing use a large number of electronic devices to realize their functions, and use servo motors or hydraulic motors to provide power.

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