Type hole plate-type seed sowing and replanting device for alfalfa

Abstract

The invention relates to the field of agriculture and animal husbandry machinery, especially relates to a seed sowing device for alfalfa routine seed sowing and replanting in the case of seedling missing of alfalfa. The seed sowing device comprises a seed case (1); a seed inlet (2) is disposed at the lower part of the seed case (1); the end part of the seed inlet (2) is directly faced a type-hole plate (4); type holes (15) are arranged on the type-hole plate (4); the type holes (15) are corresponding to the indents (16) of an indent wheel (5); the indent wheel (5) rotates along with a rotating shaft (11); the type-hole plate (4) is connected with a connection plate (9); the connection plate (9) is connected with an electromagnetic switch (10) which has a build-in return spring; and the electromagnetic switch (10) is connected with a detection device (13) through wires. The seed sowing and replanting device uses the electromagnetic switch to control the axial motion of the type-hole plate according to the electrical signals of the detection device, realizing the functions of sowing and replanting for alfalfa seeds; and has the advantages of uniform in sowing and adjustable in sowing amount, satisfying the agronomic requirements of sowing in line.

Description

technical field [0001] The invention relates to the field of agricultural and animal husbandry machinery, in particular to a seed metering device for conventional sowing of alfalfa and supplementary sowing under the condition of lack of alfalfa seedlings. Background technique [0002] The seed metering device is a component used on the seeder to sow the seeds into the field according to the agronomic requirements. At present, the precision seed metering devices include pneumatic seed metering devices, electromagnetic vibration seed metering devices, and mechanical seed metering devices. [0003] Pneumatic seed metering device has good working performance, high price and complex structure, which requires high power of supporting power, difficult to control wind pressure, and strict requirements for use and maintenance; electromagnetic vibration seed metering device does not require high seed size, but the seed metering The uniformity is not good, and the manufacturing cost is...

AI Technical Summary

Problems solved by technology

[0003] Pneumatic seed metering device has good working performance, high price and complex structure, which requires high power of supporting power, difficult to control wind pressure, and strict requirements for use and maintenance; electromagnetic vibration seed metering device does not require high seed size, but the seed metering The uniformity is not good, and the manufacturing cost is high; the mechanical seed metering device has high requirements on the size of the seeds, and cannot adapt to high-speed operations. The grain number is adjustable, the performance is stable, and the maintenance is convenient, so the present invention is designed as a mechanical seed metering device

[0004] During the planting process of alfalfa, due to sowing, disease, drought and other reasons, seedling shortage is often caused, which affects the yield of the pasture. In order to make up for the reduction of grass yield caused by the lack of seedlings and improve the productivity of the pasture, it is necessary to carry out supplementary seeding operations

[0005] The alfalfa seeders currently on the market only guarantee the sowing requirements of variable sowing rates, but fail to solve the problem of supplementary sowing operations for the lack of alfalfa seedlings

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