FR2729271A1 - High-speed distributor for spaced single seeds from storage hopper - Google Patents

Abstract

The distributor has a hollow rotary cylinder (2) whose interior is connectable to a suction source. Rows of holes (4) are formed around the cylinder wall at regular spacing, e.g. in lines inclined relative to the axis of the cylinder and the direction of motion of the distributor. The cylinder rotates through a seed hopper (1) so as to pick up individual seeds (3) by suction against each of the holes. A series of seed release members (7) are arranged at a spacing and location corresponding to the spacing of the rows of holes, to deliver seeds by gravity to a distributing hopper (10).

Description

DESCRIPTION
The present invention relates to a high-flow precision distribution device for a multipurpose seed drill.

 In terms of single-grain sowing, current disc, belt or cylinder machines do not allow high-speed distribution and are therefore used at slow speeds (4 - 6 km / h), which considerably handicaps their yield.

 The device according to the invention below makes it possible to resolve this flow rate problem. This device is of the aspirated cylinder type: a hollow cylinder comprising circular rows of regularly spaced perforations of a size less than the size of the seed to be sown is placed under vacuum; a part of the outer surface of said cylinder being in contact with a reserve of seeds, these are maintained at a rate of one by perforation. The cylinder being in rotation the seeds thus maintained are transported to the release members for their planting.

 According to a single characteristic, several circular rows of holes supply the same grounding element. To preserve the uniform distribution, the perforations of the lake, 2 = n row are regularly shifted in a constant step so that none of the perforations are aligned along the same generator of the cylinder, this configuration makes it possible to release a seed to both perfectly adjusted ~ and to increase the flow rate without excessively increasing the speed of rotation of the cylinder incompatible with proper operation.

 As a variant if the perforations of the 1st, 2nd, nth row which supply the same grounding element are aligned on the same generator of the cylinder, then the respective seed release members of the lake, 2; n rows are regularly shifted in a constant step to release one seed at a time in a perfectly regular manner. This regular offset of the holes, or alternatively, the regular offset of the release members, is designed so that a single release member is opposite a single hole of the set of holes of the 1st, 2nd ... nth rows.

 The accompanying drawings illustrate the invention.

 Figure I shows in section the device according to the invention.

 FIG. 2 represents an external view of the cylinder with the arrangement of the holes when four rows supply the same grounding element, configuration selected, without limitation for high flow rates. This figure 2 also represents the particular case where a cylinder supplies an earth element.

 FIG. 3 represents the particular case where the same cylinder feeds six elements for planting the seed drill and where each element is supplied by two rows of holes.

 With reference to these drawingsl-2-3 in these non-limiting embodiments, the device comprises a reserve (1) of seeds (3) at the base of which a cylinder (2) rotates on an axis (5) in the counterclockwise direction. The cylinder (2) is placed under vacuum by a fixed tube (6), a seal (8) ensuring the seal between these two elements. On the cylinder (2) shown in Figure 2 are formed four rows (9) of holes (4) such that A = B = C = D. Scrapers (7) constitute in this non-binding embodiment the member of release of the seeds (3) towards the receptacle (10) and are aligned along the same generatrix of the cylinder.

Claims (2)

CLAIMS - the holes (4) of the lake, 2 "nth row (9) circular which feed the same grounding element are regularly offset in a constant step so as never to be aligned along the same generator of the cylinder (2) The seed release members (3) respect the 1st, 2nd nth rows (9) are aligned so that a single release member is facing a single hole (4) in all the holes (4) of the n rows (9).  1 / Pneumatic precision seed distribution device for multipurpose seed drill, of the aspirated cylinder (2) type, characterized in that  - the holes (4) of the 1st, 2nd nth rows (9) which supply the same grounding element are aligned along the same generator of the cylinder (2). The seed seed bodies (3) respective to the lake, 2 "nth rows (9) are regularly shifted in a constant step so that a single release member is opposite a single hole (4) of all the holes (4) of the n rows (9).  2 "1 Pneumatic precision seed distribution device for multipurpose seed drill, of the suction cylinder (2) type, characterized in that