SU934960A2 - Pneumatic sower - Google Patents

Description

(54) PNEUMATIC SEALER

one

The invention relates to agricultural machinery engineering, namely to pneumatic sowing devices.

According to the main author. St. No. 891007, a pneumatic crop known for including a hopper with a metering device, a source of air flow. An air duct, an ejector feeder, a distribution manifold with branch pipes, having a rectangular cross-section and mounted along one axis with an ejector feeder, which is also made with a rectangular cross section, the side walls of the collector parallel to each other, and the width of its channel after each branch The connecting pipe is reduced in steps - on the mirgmiy of the inlet of the corresponding pipe 1.

The disadvantage of this crop is the unsatisfactory uniformity of distribution of the sown material and considerable energy consumption.

The purpose of the invention is to increase the uniformity of the distribution of w and reduce energy intensity.

The goal is achieved in that the distribution manifold is made expanding in height.

FIG. 1 shows a pneumatic assembly, general view; in fig. 2 - the same plan; in fig. 3 - the left collector of the crop along with part of the duct; in fig. 4 - seeder with the scheme for supplying air to the collectors from the air flow source, plan.

The cutter consists of a hopper 1, at the bottom

Claims (2)

10 parts of which are installed two tape dispensers 2 with gate valves 3. Dispensers 2 are installed one after the other across the hopper 1 and turned in opposite directions so that the points of the material are located to the left and right of the longitudinal axis of the bunker If Under the dispensing points of the material dispensers 2 installed feed ports 4 ejector feeders 5. Ejector feeders 5 na30 are directed oppositely to the corresponding batchers 2 and will organically go to the left b and right 7 sections will distribute together with them the left and right working branches of the sek. Comparatively short branch pipes 8 are located along the length of the sections of the distribution manifold. The sections of the distribution collector in the sections between the adjacent branch pipes are widened by increasing the distance between their upper and lower walls along the length of the sections. Each working branch of the cutter, consisting of the common axis of the corresponding ejector feeder 5 and one of the sections of the distribution manifold 6 or 7, is made with a rectangular cross section, the side walls of which are parallel to each other, and the width of the working branch after each branch pipe 8 is reduced by the width of the inlet of the latter. The width of the ejector feeders 5 is equal to the width of their feed ports 4, which, in turn, is equal to or close to the width of the discharge slits of the dispensers 2. The nozzles of the ejector feeders 5, the ducts 9 and 10, communicate with the air flow source by the fan 11. The selen works as follows . When the air flow source of the tape metering units 2 is turned on, the air flow through the air ducts 9 and 10 enters the ejector feeders 5, into which, at the same time, the sowing material flows through the feed ports 4. The latter is fed from the discharge slots between the gate valves 3 and the metering tapes. 2. Since the width of the discharge slits of the dispensers 2 is equal to or fairly close to the width of the feed ports 4, which in turn are made across the entire width of the ejector feeders 5, the material enters them pre-distributed across the width of each of them. Under the action of a jet of ejector flow of air, which is also distributed over the entire width of the ejector feeders 5, the material along the specified width is uniformly mixed with air and accelerates to the required speed. Since the side walls of the ejector feeders 5 are parallel, the material moving between them and further, maintains its uniform distribution over their widths. When encountering the inlet of the branch pipe first after the ejector feeder, part of the material in the aero mix stream branches into the branch pipe 8. Since the width of the subsequent section of the distribution manifold section decreases in steps by the width of the branch pipe inlet and the parallel walls of this section are as between each other and with the walls of the ejector feeder 5 is maintained; taking into account that the inlet of the branch pipe is part of the cross section of the previous section, i.e. of the ejector feeder, the amount of branch material in this case is proportional to the width of the inlet port of the nozzle 8. The remaining portion of the main flow of the aerosol mix freely passes into the next section located between the adjacent nozzles 8 of the distribution manifold section. In this area, the flow of air, using part of its kinetic energy to overcome the hydraulic losses of the area, somewhat slows down. Since the degree of expansion of the channel of the sections of the distribution manifold is chosen such that the differential velocity of air between the initial and final sections of its sections is equal to the hydraulic losses at the estimated material consumption, the differential pressure across the section is zero or to it. Therefore, aspiration or excess air is blown out in the previous branch pipe, and with it, there is no disturbance to the uniform flow of material into its inlet. The particle flow itself, moving between the parallel side walls of this area, partly due to inertia, partly under the influence of the jet, keeps the air flow evenly, its distribution across the channel width of the corresponding collector section and meeting the subsequent inlet of the branch pipe its width, etc. Expansion of the channels in the areas between adjacent branch pipes only by increasing the distance between the upper and lower walls of the channel while maintaining parallelism of all side walls allows, among other things, to maintain uniform distribution of the material across the channel width throughout its length and thereby avoid the influence side factors of the expanding channel on seeding uniformity. Claims of the invention Pneumatic gas on the author. St. No. 891007, characterized in that, in order to increase the uniformity of distribution and reduce energy intensity, the distribution manifold is made expanding in height. Sources of information taken into account in the examination 1. USSR author's certificate №891007. cl. A 01 C 15/04 03/19/79. t " // Have