Magnetic suction precision sowing method and its equipment

Abstract

The invention relates to a magnetic suction precision sowing method and device suitable for precision sowing of small grain seeds such as vegetables, flowers and seedlings. The method is to form a magnetic suction type seed picker by a magnetic suction head, an electromagnetic coil, a diamagnetic sleeve, etc., and pass a current to the electromagnetic coil to make the magnetic suction head generate a certain magnetic induction intensity, thereby generating a certain amount of pressure at the lower end of the magnetic suction head. The magnetic field, using the presence or absence of magnetic force, absorbs and broadcasts seeds to achieve precision sowing; adjusting the magnitude of the electromagnetic coil energizing current can obtain different magnetic field forces to achieve precision sowing of seeds of different particle sizes. The device includes a sowing mechanism, a magnetic seed picker, a seed box, a conveying platform, a conveyor belt, a tray, a motor, etc. The sowing mechanism is a parallelogram mechanism, and a magnetic suction type is installed on it according to the hole distance of the tray. Seed taker. The method can realize both on-demand sowing and drill sowing, and the precision sowing rate of single grain is high, the sowing speed is fast, and the seeds are not damaged.

Description

technical field [0001] The invention relates to a sowing method suitable for precision sowing of small-particle seeds such as vegetables, flowers and seedlings, in particular to a magnetic suction precision sowing method. The invention also relates to a precision sowing device for plug seedlings designed by using the method. Background technique [0002] In the early 1970s, the United States first introduced the industrial plug seedling technology. Because this technology has the characteristics of high speed, high quality and high yield, it has been rapidly promoted in other agricultural economically developed countries such as the Netherlands, France, Germany, Japan and other countries. . One of the key technologies to be solved in industrial plug seedling technology is the precision on-demand sowing of seeds. Since most vegetables and flower seeds are small in size, light in weight and irregular in shape, it brings difficulties to the precision sowing of seeds. At presen...

AI Technical Summary

Problems solved by technology

Air-suction sowing is carried out by means of air-suction. At present, needle-type (also known as nozzle-type) precision seeders and suction-cup precision seeders commonly used at home and abroad are air-suction precision seeders. There are no specific requirements for the shape of the seeds, and the sowing accuracy is high, but the suction pipe or suction hole is easy to be blocked, and the suction nozzle needs to be replaced for seeds of different particle sizes, and the manufacturing cost and technical requirements are high; mechanical precision seeding is carried out mechanically Picking and sorting seeds, such as the tooth disc precision seeder manufactured in China, uses the holes on the tooth disc to allow each tooth to scoop up a seed from the seed box and accurately drop it into the seed trough. In the holes of the plug tray, this sowing method has high requirements on the shape of the seeds. Generally, the seeds need to be pelletized, which is easy to damage the seeds when scooping up the seeds, and the sowing accuracy is not high; the electromagnetic vibration precision Sowing uses the principle of electromagnetic vibration sorting seeds. Our patent 93246722.9 discloses such a seeder: it is composed of a seeder, an electromagnet and a synchronizer. The electromagnet receives the pulse signal transmitted by the synchronizer to drive the seeder. The vibrating plate of the device swings, and the seeds flowing out from the vibrating box move along the trapezoidal groove set on the seeding tray, and are restrained by the ratchet teeth in the groove, moving forward evenly and falling into the seeding pipe, and then the seeding The tube is introduced into the hole. This sowing method can be adapted to sow seeds of various shapes, but the single seed precision sowing rate is low and the reseeding rate is high, which is more suitable for drill sowing. In recent years, some people have also studied the use of magnetic force for sowing, such as A precision seeder disclosed in Chinese patent 90227208.X: it consists of a seed box, a seed meter box, a valve, etc. The seed meter box is equipped with a valve, and there is a magnetic switch in the seed box to control the opening of the valve , the valve is opened, and the seeds fall from the round hole of the seed box into the hole. This sowing method is still mechanical sowing, but it uses magnetic force instead of mechanical force when opening the valve. This sowing method also has vulnerable seeds, sowing The disadvantage of low precision

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