Pneumatic blockage-preventing and seed-leakage-free plug seedling and precision seed arrangement method and device

Abstract

The invention discloses a pneumatic blockage-preventing and seed-leakage-free plug seedling and precision seed arrangement method and device. A piston block detection switch is adopted for detecting seed leakage and blockage of a suction nozzle in seed sucking unit parts of a precision seed arrangement device and controlling the movement of a multi-suction nozzle seed sucking system. Seed sucking unit parts on the multi-suction nozzle seed sucking system are arranged corresponding to positions of holes in a seedling plug, and each seed sucking unit part is provided with a piston block detection switch; a piston block is in a middle balance position when not working, and when a pneumatic force changes, a piston movement relative to an air chamber is generated, and thus a corresponding switching function is realized. When the suction nozzles do not suck seeds, the pressure in the suction nozzles is a smaller negative pressure, the piston block does not move, and a leak-suction-preventing switch is turned on; when a pressure force in each hole after the suction nozzles suck the seeds is a larger negative pressure, the piston block downwards moves, and a normal seeding switch is turned on; when seeds are discharged at a positive pressure, the suction nozzles cannot discharge the seeds due to blockage, the piston block is forced to upwards move, and a blockage-preventing switch is turned on. The pneumatic type blockage-preventing and seed-leakage-free plug seedling and precision seed arrangement method and device are capable of realizing blockage-preventing and seed-leakage-free fine-sowing processes of all suction nozzles, and can be applied to accurate sowing of plug seedling.

Description

technical field [0001] The invention belongs to the technical field of precision sowing of agricultural machinery, and in particular relates to the precision sowing equipment technology of industrialized seedling raising. Background technique [0002] The seed metering device of the present invention belongs to the technical category of industrial seedling raising precision sowing equipment, and the precision sowing device is the core equipment technology of the precision sowing equipment, which directly affects the effect of sowing. Its popularization will effectively promote the development of industrialized seedling raising precision seeders and indoor modern agriculture, save a lot of manpower and expensive seeds, improve the working environment and labor intensity of cultivation technicians, and achieve better economic and social benefits. [0003] The development of foreign precision seed metering devices began in the 1940s, and the technical level is already very high...

AI Technical Summary

Problems solved by technology

It has always been a key problem to be solved by precision seeding. According to agronomic requirements, the seeding rate is generally controlled at 95%~98%, but at present, all precision seeding devices cannot realize the problem of no missing seeds in real time and proactively.

At home and abroad, many methods such as electronic monitoring and single-chip microcomputer control are used to monitor the missing sowing situation, and replanting is carried out according to the monitoring. Jin Hengmo has carried out automatic monitoring and automatic compensation of seed leakage for precision seeders, and adopted an air blocking system to eliminate blockage; Yang Wanzhang and Guo Hui of Xinjiang Agricultural University have developed an elastic needle anti-blocking device for vertical disc precision seed metering devices, which is easy injured species

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