DEVICE FOR THE METERING OF SEED GRAIN

Abstract

A device for metering of seed grain, in particular a device (19) for metering of seed grain (2) arranged on a sowing machine, comprising a carrying means (4) and a tube (3) for the outlet of seed grain (2) towards the sowing area, where the carrying means (4) is specifically made to be with negative air-pressure or positive air pressure, which comprises at least one tube (1) with pressurised air for directing seed grain (2) from the carrying means (4) into the tube (3) for the outlet of seed grain (2), and a tube (1) with pressurised air is adjacent to the carrying means (4) and its axis (5) forms a tangent (13) to the carrying means (4) an angle of =30, and the tube (3) for the outlet of seed grain (2) is adjacent to the carrying means (4), wherein its axis (6) forms a tangent (13) to the carrying means (4) an angle of Y=30.

Claims

1. A device for the metering of seed grain arranged on a sowing machine for precision sowing, which comprises a carrying means and a tube for the outlet of seed grain towards the sowing area, where the carrying means is specifically made to be with negative air pressure or positive air pressure, wherein it comprises at least one tube with pressurised air for directing seed grain from the carrying means into the tube for the outlet of seed grain, the said tube with pressurised air is adjacent to the carrying means and its axis forms a tangent to the carrying means an angle of =30, and the tube for the outlet of seed grain is adjacent to the carrying means, wherein its axis forms a tangent to the carrying means an angle of =30.

2. The device for the metering of seed grain according to claim 1, wherein the axis of the tube with pressurised air is parallel to the axis of the tube for the outlet of seed grain.

3. The device for the metering of seed grain according to claim 1, wherein the axis of the tube with pressurised air is, towards the axis of the tube for the outlet of seed grain, eccentrically shifted.

4. The device for the metering of seed grain according to claim 1, wherein the axis of the tube with pressurised air forms with the plane of the carrying means an angle of =0 to 30.

5. The device for the metering of seed grain according to claim 1, wherein the axis of the tube for the outlet of seed grain forms with the plane of the carrying means an angle of =0 to 30.

6. The device for the metering of seed grain according to claim 1, wherein the mouth of the tube for the outlet of seed grain is larger than the mouth of the tube with pressurised air.

7. The device for the metering of seed grain according to claim 1, wherein the tube for the outlet of seed grain comprises a sensor for flyby seed grain.

8. The device for the metering of seed grain according to claim 1, wherein the tube for the outlet of seed grain comprises an airfoil means for directing air flow.

9. The device for the metering of seed grain according to claim 1, wherein the tube with pressurised air and the tube for the outlet of seed grain form a single unit.

10. The device for the metering of seed grain according to claim 1, wherein the carrying means is a metering disc or a metering belt or a metering drum.

11. The device for the metering of seed grain according to claim 1, wherein the carrying means is a metering disc with openings or slots for sucking up seed grain adjacent to the negative pressure chamber.

12. The device for the metering of seed grain according to claim 10, wherein the carrying means comprises an arranged rotatable negative pressure chamber.

13. The device for the metering of seed grain according to claim 1, wherein the carrying means comprises an area without negative or positive air pressure.

Description

OVERVIEW OF THE FIGURES

[0023] The invention will be further elucidated using drawings, in which

[0024] FIG. 1 shows a partial cross sectional spatial view of the overall internal arrangement of a seed grain metering device,

[0025] FIG. 2 shows a detailed view of the spatial arrangements of a tube with pressurised air and a seed outlet tube,

[0026] FIG. 3 shows a side view of the overall arrangement of a seed grain metering device,

[0027] FIG. 4 shows a frontal view of the internal arrangement of a seed grain metering device with an indication of its function,

[0028] FIG. 5 shows a detailed view of the spatial arrangement of an eccentric tube with pressurised air and a seed outlet tube,

[0029] FIG. 6 shows a detailed view of the spatial arrangement of a seed grain metering device, which comprises a carrying means which is a negative pressure belt,

[0030] FIG. 7 shows an overall spatial arrangement of a seed grain metering device, which comprises a carrying means which is a metering belt,

[0031] FIG. 8 shows a detailed view of the spatial arrangement of a compressed air tube and a seed outlet tube, which are rotated tangentially to the carrying means,

[0032] FIG. 9 shows a cross section of the carrying means comprising a rotatable negative air pressure chamber,

[0033] FIG. 10 shows the overall spatial arrangement of the grain seed metering device, comprising a carrying means which is a metering drum,

[0034] FIG. 11 shows a cross section of the carrying means which comprises a metering disc adjacent to the negative air pressure chamber, and

[0035] FIG. 12 shows a partial side view arrangement of a device for seed grain metering on a sowing machine for precision sowing.

EXAMPLES OF THE PERFORMANCE OF THE INVENTION

[0036] The device 19 for the metering of seed grain 2 (FIG. 1, FIG. 2, FIG. 3, FIG. 4) is arranged on a sowing machine 20 (FIG. 12) for precision sowing, which comprises a carrying means 4 and a tube 3 for the outlet of seed grain 2 towards the sowing area. The carrying means 4 is made to be with negative air pressure or positive air pressure, working on the principle of sucking up seed grain 2 using a pressurised gradient.

[0037] The carrying means 4 is a metering disc 9 (FIG. 11) with openings 10 for sucking up seed grain 2 adjacent to a negative pressure chamber 11. The openings 10 are sized with respect to the crop sown. The carrying means 4 comprises an area 15 without positive or negative air pressure, which is created by turning off the pressure chamber 11 and which is mounted (FIG. 2) approximately in the area where seed grain 2 is pulled by a stream of air from the carrying means 4 to the tube 3 for outlet of seed grain 2.

[0038] Alternatively (FIG. 9), the carrying means 4 may comprise an arranged rotatable negative pressure chamber 11.

[0039] In other variations, the carrying means 4 may be a metering belt 16 (FIG. 6, FIG. 7) with openings 10 for sucking up seed grain 2 adjacent to a negative pressure chamber 11 or, a metering drum 18 (FIG. 10) with openings 10 for sucking up seed grain 2 adjacent to a negative pressure chamber 11.

[0040] The device 19 for the metering of seed grain 2 further comprising one single tube with pressurised air directing seed grain 2 from the carrying means 4 to the tube 3 for the outlet of seed grain 2.

[0041] A tube 1 with pressurised air adjacent to the carrying means 4, whose axis 5 is parallel to the tangent 13 of the carrying means 4. A tube 3 for the outlet of seed grain 2 is adjacent to the carrying means 4, which is also parallel to the tangent 13 of the carrying means 4.

[0042] As a variant (FIG. 8), the axis 5 of a tube 1, with pressurised air tangent 13 to the carrying means 4 forms an angle of =30, and the axis 6 of the tube 3 for the outlet of seed grain 2 forms with the tangent 13 of the carrying means 4 an angle of =30, and the size the angles and can be different.

[0043] The axis 5 of a tube 1, with pressurised air is parallel to the axis 6 of the tube 3 for the outlet of seed grain 2.

[0044] As a variant (FIG. 5) the axis 5 of a tube 1, with pressurised air may be facing the axis 6 of the tube 3 for the outlet of seed grain 2 shifted eccentrically by a distance of a.

[0045] The axis 5 of a tube 1, with pressurised air is also parallel to the plane 17 of the carrying means 4, and as a variant (FIG. 11), the axis 5 of a tube 1, with pressurised air forms, with the plane 17 of the carrying means 4 an angle of =0 to 30.

[0046] The axis 6 of the tube 3 for the outlet of seed grain 2 forms (FIG. 1, FIG. 9) with the plane 17 of the carrying means 4 an angle of =15.

[0047] The mouth 7 of the tube 3 for the outlet of seed grain 2 is significantly larger than the mouth 8 of the tube 1 with pressurised air.

[0048] The tube 3 for the outlet of seed grain 2 contains a sensor 12 for flyby seed grains 2. The tube 3 for the outlet of seed grain 2 contains an airfoil means for directing airflownot shown.

[0049] In a variant not shown, a tube 1 with pressurised air and a tube 3 for the outlet of seed grain 2 form a single unit.

[0050] The device 19 for the metering of seed grain (FIG. 4) operates so that on one side of the carrying means 4, which is a metering disc 9, are located openings 10 with negative air pressure, and through the openings 10 of the disc 9 air flows, creating a suction effect which, on the opposite side of the metering disc 9 attaches seed grain 2. In the lower part of the filling chamber 14, where is sucked up the seed grain 2 (not shown) an air jet streaming air, which ensures fluffing of the seed grain 2, which improves sucking up of the seed grain 2. After sucking seed grain 2 onto the metering disc 9, it passes on the rotating metering disc 9 through a zone not shownwith a so-called comb, which combs off the excess seed grain 2 so that each suction opening 10 has only one grain of seed 20. On the side opposite to the filling chamber 14 is the point where seed grain 2 receives a vertical tangent trajectory, and on the back side of the metering disc 9 is located a pressure turn offnot shown. After turning off the pressure, the seed grain 2 is released, and has a tendency to continue flying on a tangent vertically downwards. In the axis tangent to this flight on the metering disc 9 is an adjacent tube 3 for the outlet of seed grain 2. Opposite the entrance to the tube 3 for the outlet of seed grain 2 is located a tube 1 with pressurised air. At the intake of seed grain 2 into the seed tube 3 is located a flyby seed sensor 12, which detects the flyby of each seed grain 2, while the electronic control system of the sowing machine, based on data about the rotating metering disc 9 and on the working speed of the sowing machine evaluates instantaneous error rates and the instantaneous actual number of dosed grains.