Small seed dual-purpose cone-embedded double-circular-truncated-cone annular air distribution mechanism

Abstract

The invention belongs to the technical field of agricultural machinery seeding, and particularly relates to a small seed dual-purpose cone-embedded double-circular-truncated-cone annular air distribution mechanism. The small seed dual-purpose cone-embedded double-circular-truncated-cone annular air distribution mechanism comprises an airflow access pipe, an air distribution mechanism shell and a plurality of airflow distribution pipes, the air distribution mechanism shell comprises a high circular truncated cone cylinder, a short circular truncated cone cylinder and an inverted cone, and the multiple airflow distribution pipes communicating with a special-shaped through cylinder body are uniformly distributed on the outer side surface of the short circular truncated cone cylinder in the circumferential direction. Compared with the prior art, the small seed dual-purpose cone-embedded double-circular-truncated-cone annular air distribution mechanism has the following advantages that by reasonably designing the structures of the airflow access pipe, the air distribution mechanism shell and the airflow distribution pipes, airflow is stably transited from a cylindrical section to an annular channel, finally seeds uniformly and stably flow out of the air distribution mechanism along with the airflow, and the multiple airflow distribution pipes achieve equivalent distribution of the airflow in multiple directions, so that the outflow efficiency of small seeds in different shapes along with the airflow is further ensured; and the whole structure is regular, the integrally-formed structure is easy to process, processing cost can be effectively controlled, and application and popularization are facilitated.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery sowing, and in particular relates to a small-grain seed double-purpose type embedded cone double-circle ring-type air distribution mechanism. Background technique [0002] Small seeds refer to seeds with a sphericity of not less than 80% and an average particle size of not more than 3mm, which mainly include rapeseed, millet, alfalfa, flowers, and some vegetable seeds. Due to the small diameter, weak shearing resistance and large difference in seeding rate, the direct seeding machine is an important way to improve the production efficiency and fertilizer utilization efficiency of small seeds. It directly determines the quality of the planting density; the existing precision combined direct seeding machines usually use an in-line multi-channel air distribution mechanism for multi-channel air distribution, and a single pneumatic precision metering device is arranged and combined to ac...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing air distribution mechanism has serious airflow loss due to unreasonable structure, which will affect the consistency of seed discharge in the case of poor ground flatness in the field, and provides a small seed dual-purpose embedded cone Double circular table ring type gas distribution mechanism

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