SU1464934A1 - Pneumatic drill - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to agricultural machinery. The purpose of the invention is to improve the quality of single grain seeding at higher speeds. The apparatus contains a hopper 1, a seeding drum 2, swept outwardly by a ring 3, cells 4, a housing 5 with interconnected channels 6, pneumatic chambers 7-10 2 "and a replaceable chamber 11. The upper part of chamber 11 is in communication with ancestral cavity through pneumatic channel 12, which is connected to the hopper 1 in the lower part, and through the introductory channel to the seed chamber 11. The chamber 8 communicates with the chamber II through the air nozzle 15, behind which a reflective plate 16 is installed. A hole 18 is provided for seeding the seeds through groove 19. Sleep Ruzhi ring 3 to the slit groove 19 is adjacent the vacuum chamber 20. Seeds 17 sunken into the cells 4, the drum 2 are transported for reflection plate 16 where vozduschny flow from the nozzle 15 blows lischnie seeds. In order to stably hold seeds at high speeds and prevent the seed cells 4 from blowing out all four, an additional suction force is created through the slit groove 19 due to the vacuum in the chamber 20. The seeds remaining in the cells are transported by the drum 2 and seeded in the opening 18. 2 silt 3 20 2-, / (О (Л and сг 4 СО 00

Description

FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular to pneumatic sowing machines.

The purpose of the invention is to improve the quality of single grain seeding at higher speeds.

FIG. 1 shows the proposed sowing apparatus, general view, section; in fig. 2 shows section A-A in FIG. one.

The pneumatic sowing unit contains a seed bin 1, a vertically mounted sowing drum 2, which is encircled on the outside by a ring 3. The through-holes 4 are made in the drum 2. Inside the drum 2 there is a cylindrical body 5 with interconnected tangential channels 6, pneumatic chambers 7 -10 and the seed chamber 11. The upper part of the chamber 11 is connected by means of the pneumatic channel 12 with the precameral cavity 13, which is in the lower part of the coej dinina with the bunker 1, and through the introduction channel 14 with the seed chamber 11.

The pneumatic chamber 8 communicates with the seed chamber 11 by means of an air nozzle 15, behind which a reflective plate 16 is installed. In order to release the cells 3 from the seeds 17, an outlet opening 18 is made in the pneumatic chamber 7. In the ring 3 there is a slotted through groove 19 located along the movement line of the cells 4 A seeding drum 2. On the outside of the ring 3, a vacuum chamber 20 with a housing 21 adjoins the slit groove 19. To ensure a tight fit of the vacuum chamber 21 to the ring 3, a soft gasket 22 is installed between them. Supply air flow for creating overpressure in the pneumatic chamber); 7-10 is carried out through the pipe 23, and the suction of air to create a vacuum in the chamber 20 is carried out through the pipe 24.

The device works as follows. Seeds 17 through the inlet channel 14 come from the pre-chamber cavity 13 into the lower part of the seed chamber I, where they are picked up by the air flow generated by the movement of air from the pneumatic chamber 8, and then from chamber 10 through tangentially located channels 6 and trance are sorted through the channel of the seed chamber 10 in its upper part, where part of the seeds due to the centrifugal forces acting during the curvilinear movement and the overpressure in the chamber 11 fills the cells 4 of the rotating drum 2, and the rest

part of the seed and the air flow, reflecting on the plate 16, are led through channel 12 to the precameral cavity 13. From the pre-chamber cavity 13, a part of the air flow goes through the hopper 1 to the atmosphere, and some through the introductory channel 14 to the seed chamber 11, This seed, moving along the wall between the channels 12 and 14 of the pre-chamber cavity 13, re-enters the seed chamber 11, thereby forming

recirculation of seed flow in the apparatus. The seeds 17, which fall into the cells 4, are transported by the drum 2 over the baffle plate 16, where the oncoming airflow coming through the nozzle 15 from the pneumatic chamber 8, blows off the excess seeds from the cells 4, and they fall out through the channel 12 into the precameral cavity. In order to stably hold seeds at elevated seeding rates and prevent all seeds from blowing out of the cells 4, an additional 0 suction force is created through the slotted slot 19 in the circumferential ring 4 due to the vacuum in the chamber 20.

The seeds remaining in the cells 4 are transported by the drum 2 supported from the ring on one side.

 3, and on the other hand, the cylindrical surface of the housing 5. When the cell 4 is aligned with the seeds with an outlet 18, an air flow is received through this opening from the vacuum chamber 7,

R. throws seeds into the furrow.

The introduction of the proposed apparatus into production makes it possible to obtain an effect by increasing the productivity of seeds, improving the quality of seeding at high speeds.

Claims (1)

Invention Formula A pneumatic sowing unit, comprising a housing with pneumatic chambers and pneumatic canals, a seed chamber with inlet and outlet channels, a seed hopper, a sowing drum with outer cells enclosed on the outside with a ring and a horizontal axis of rotation, an air nozzle, a reflective .- plate and an outlet , characterized in that, in order to improve the quality of single-grain seeding at higher speeds, the apparatus is equipped with a vacuum chamber, communicating the situation with the seed chamber by means of the upper part 0 rings along the line of movement of the centers of the cells through the longitudinal O groove. / IA 2b , 13 fig.g