RU146615U1 - PNEUMA-MECHANICAL COLLECTOR - DISTRIBUTOR OF PNEUMATIC GRAIN SEED PLANT - Google Patents

Abstract

Pneumo-mechanical collector - a distributor of a pneumatic grain seeder containing a vertical supply pipe, a centering device and a distribution head with outlet pipes, characterized in that the centering device for the seed is made in the form of a confuser of a fine-mesh metal mesh with curvilinear generators (R, r) and installed in vertical supply pipe of the collector-distributor, and the shape of the centering device is formed by a smooth transition from about the cross section to the smaller one, as well as the rounding of the rectilinear walls at the exit to the straight section (l), while the input diameter is tightly adjacent to the inner wall of the vertical supply pipe.

Description

The utility model relates to agricultural engineering, namely to pneumatic seeders with a central metering of seeds and mineral fertilizers.

A distribution device of a pneumatic seeder is known (AS No. 212307, IPC A01C 15/04, A01C 7/04, 1999), comprising a supply pipe, a housing, a cover with outlet pipes and a reflector in the form of a spherical segment and a flow former with a screw transducer.

The disadvantage of this device is the reduction of speed, pressure in the flow former installed in the supply pipe, due to the many collisions of the seed. Sophisticated design further increases the energy intensity of the work.

A device is known (AS No. 217101, from 1968, BI No. 24 C. A01C 15/04), comprising a vertical supply pipe with a branch, a guide, a centering device and a distribution head with branch pipes and a reflector.

The disadvantage of this device is the uneven distribution of the seed on the coulters, since the centering device does not completely cover the incoming flow of the seed.

The closest technical solution, selected as a prototype, is a switchgear for bulk materials (AS SU No. 571212 A, IPC A01C 15/04, A01C 7/20, 1977), containing a vertical pipeline, a centralizer, a distributor a head with outlet pipes and a distribution mechanism in the form of a dividing cone.

However, this device does not provide a uniform distribution of the sowing material on the coulters, because in the centralizer-guide, made in the form of a conical confuser, pressure loss occurs. This is mainly due to the separation of the flow behind the inlet section of the confuser.

The problem that this utility model is aimed at is to increase the uniformity of seed distribution over the coulters and reduce the energy intensity of its work.

This is achieved by the fact that the proposed device, which contains a vertical inlet pipe, a centering device and a distribution head with outlet pipes. The centering device for the sowing material is made in the form of a confuser from a fine-mesh metal mesh with curvilinear generators (R, r) and is installed in the vertical supply pipe of the collector-distributor. The shape of the centering device is formed by a smooth transition from a larger section to a smaller one, as well as the rounding of rectilinear walls at the exit to a straight section (l _{other area} ). The inlet diameter fits snugly against the inner wall of the vertical supply pipe.

The optimal rounding radius of the rectilinear wall of the centering device is within:

R = (0.5 ... 1) · d _out ,

where d _o - the output diameter of the centering device, mm

The length of the centering device is within:

l _c.u = (1 ... 1,5) · D _in ,

where is the input diameter of the centering device, mm

The use of a centering device for sowing material, made in the form of a confuser from a fine-mesh metal mesh, allows you to completely cover and form the incoming sowing material in a dense stream and direct it to the center of the distribution head with outlet pipes. With a smooth decrease in the cross-section of the confuser, the flow does not break away from the walls at the point of transition to a straight section and pressure losses are reduced only to friction losses in the tapering part, which will increase the speed of transportation of the sowing material and evenly distribute along the coulters.

Pneumo-mechanical collector-distributor (Fig. 1) works as follows. Sowing material through a vertical supply pipe 1 is fed to a centering device 2 (Fig. 2). Then, the centering device for the sowing material, made in the form of a confuser from a fine-mesh metal mesh, forms and directs the sown material to the center of the distribution head with outlet pipes 3.

Thus, the use of a pneumomechanical collector - distributor allows to increase the uniformity of the distribution of sowing material on the coulters and reduce the energy intensity of work.

Claims (1)

Pneumo-mechanical collector - a distributor of a pneumatic grain seeder containing a vertical supply pipe, a centering device and a distribution head with outlet pipes, characterized in that the centering device for the seed is made in the form of a confuser of a fine-mesh metal mesh with curvilinear generators (R, r) and installed in vertical supply pipe of the collector - distributor, and the shape of the centering device is formed by a smooth transition from a larger to a smaller cross section, as well as rounding rectilinear wall outlet in a straight portion (l _pr.uch), wherein the inlet diameter fits snugly to the inner wall of the vertical supply pipe.

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