Magnetic-type precise seed-metering device

Abstract

The invention discloses a magnetic-type precise seed-metering device, and relates to the field of agricultural sowing machinery. The precise seed-metering device comprises a seed-metering element, a seed-metering element sleeve pipe, a mounting bracket, an adjustable DC stabilized power supply, and a power supply polarity switch. Output current of the DC stabilized power supply is adjusted, and current direction of a solenoid coil is changed. Magnetic induction intensity of a seed-suction end face of a magnetic head is changed, and polar N, S pole directions of an electromagnet magnetic pole end are changed. With the changes of the magnetic induction intensity of the seed-suction end face of the magnetic head, seed metering requirements of seeds of different specifications can be satisfied. With the changes of the polar N, S pole directions of the electromagnet magnetic pole end, seed-metering device seed suction and seed discharging actions can be achieved. Compared with a permanent magnet seed-metering element, with the device provided by the invention, a special forced seed discharging mechanism is not needed, such that seed damage caused by mechanical seed discharging is avoided; the magnetic head suction power is adjustable, such that sowing requirements of coated seeds with different specifications can be satisfied by a seed-metering element with a single specification.

Description

technical field [0001] The invention belongs to the field of agricultural seeding machinery, in particular to a magnetic suction type seed metering device for precision seeding. Background technique [0002] Precision seeding has become an advanced planting method, which has significant advantages such as saving seeds, reducing the workload of thinning, and increasing production and efficiency. At present, the main methods of precision seeding operations are pneumatic, mechanical, electromagnetic vibration and so on. In view of the disadvantages of the pneumatic seeder, such as complex structure, high cost, easy blockage of air holes, low precision and easy damage to the mechanical seeder, the Chinese patent ZL02138075.9 proposed the principle of magnetic suction precision seeding. The seeding principle is: use the columnar electromagnet as the magnetic seeding element, use the electromagnet suction to absorb the magnetic powder coated seeds, and realize the filling and see...

AI Technical Summary

Problems solved by technology

In view of the disadvantages of the pneumatic seeder, such as complex structure, high cost, easy blockage of air holes, low precision and easy damage to the mechanical seeder, the Chinese patent ZL02138075.9 proposed the principle of magnetic suction precision seeding. The seeding principle is: use the columnar electromagnet as the magnetic seeding element, use the electromagnet suction to absorb the magnetic powder coated seeds, and realize the filling and seeding of the seeder by controlling the current on and off of the electromagnetic coil of the electromagnet; Chinese patent ZL200520075650 is published A magnetic drum-type precision seeding device is proposed, and the seed metering device of the patent seeding device also uses a columnar electromagnet as a magnetic seeding device; Chinese patent ZL200910029443.2 discloses a permanent magnet magnetic suction precision seeder, the device's The seed metering device changes the electromagnet of the seeding element in the magnetic roller seeder into a permanent magnet, and attaches a cam type forced seed clearing mechanism to complete the seed clearing action

[0003] When the seed metering device uses a columnar electromagnet as the magnetic seeding element, the seeding element has the disadvantages of low magnetic field strength, many coil turns, large volume, and easy to generate heat.

When the seed metering device uses the permanent magnet type as the seeding element, although it overcomes some shortcomings of the electromagnetic drum type seeder, it still has a complex seed cleaning mechanism that is easy to damage the seeds, and the installation and adjustment of the seeding element in the drum is inconvenient. Disadvantages such as low continuous seeding efficiency.

Images