Single and double grain adjustable air-aspiration type cotton seed-metering device

Abstract

The invention discloses a single and double grain adjustable air-aspiration type cotton seed-metering device. The device comprises a bearing end cover, a seed-metering device shell, a seed-metering plate seat, a left seed-metering plate, a pressure plate, a sealing ring, a left negative pressure cavity, a negative pressure conversion mechanism, a right negative pressure cavity, a right seed-metering plate, a bearing and a seed-metering shaft. The device is characterized in that the left seed-metering plate and the right seed-metering plate are mounted at the two sides of a negative pressure cavity, and the left seed-metering plate communicates with the left negative pressure cavity. One cavity is provided with two holes, dual-grain seed metering is carried out, the right seed-metering plate is communicated with the right negative pressure cavity, one cavity is provided with one hole, single-grain seed metering is carried out, seed stirring teeth are respectively arranged on the end surfaces of the left seed-metering plate and the right seed-metering plate , and cotton seeds are uniformly stirred to be in a floating state, so that the cotton seeds are conveniently adsorbed by suction holes. The seed-metering device shell is installed at the two sides of the negative pressure cavity, the negative pressure conversion mechanism comprises a negative pressure channel and a negative pressure converter and is connected with the left negative pressure cavity and the right negative pressure cavity, and limiting holes are formed in an extending rod of the negative pressure converter and fixed through limiting pins, so that the left negative pressure cavity and the right negative pressure cavity are conveniently and rapidly switched. The seed-metering device can be adjustable in seed metering single and double grains, and is suitable for cotton precision seeding with different agronomic requirements.

Description

technical field [0001] The invention relates to an air-suction cotton seed metering device, in particular to an air-suction cotton seed metering device with adjustable single and double grains. Background technique [0002] Traditional cotton is sown with 3 to 5 seeds per hole, which not only wastes seeds, but also tends to cause tall and weak seedlings after emergence. The invention can be used for both single-grain seeding and double-grain seeding, and the switching between single-grain and double-grain seeding is convenient. Contents of the invention [0003] The purpose of the present invention is to provide an air-suction cotton seed metering device with adjustable single and double grains. , It can also be used for double-seed seeding, which saves seeds, and the cotton seedlings emerge completely, evenly, evenly, and strong. [0004] In order to achieve the above object, the present invention adopts the following technical solutions: a single-double-grain adjustabl...

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