Device for injecting manure into the ground

Abstract: Device (1) for injection manure into the ground comprising at least one coulter (6) extending into the ground and bounding a manure receiving space and which is connected via a conduit (7) to a manure cutter (5) consisting substantially of a manure chamber having arranged in the manure chamber wall at least one outlet which is provided with at least one knife (26) passing therealong, characterized in that the knife passes between the manure chamber wall and at least one counter-knife (28).

Description: The invention relates to a device for injecting manure as indicated in the preamble of claim 1. Such a device is known from NL-A-7514909. The problem occurs therein that the device does not properly spread the manure uniformly. The invention has for its object to provide a device that provides a good uniform spreading of the manure in the ground. The device according to the invention has the feature that the knife passes between the manure chamber wall and at least one counter-knife. Since less blockage of the device occurs the manure spreading becomes more uniform. Prefered additional features of the device are indicated in the subclaims. It is remarked that NL-A-7511421 discloses a device for injecting manure into the ground, in which a manure treater for making manure pieces smaller besides knives cooperating with the outlets also has additional knives provided at a great distance from the first mentioned knives. No fixed counter-knives are present. The additional knives result in straw and other long material wrapping around said additional knives, which results in blockage of the manure treater. In the description following hereinbelow a prefered embodiment of the device according to the invention will be described with reference to a drawing, wherein: Figure 1 shows a side view of this device; Figure 2 shows a perspective view of this device; Figure 3 shows a section along line III-III of figure 1; Figure 4 shows a section along line IV-IV of figure 1; Figure 5 shows a section along line V-V of figure 1; and Figure 6 is a perspective, partly broken away view of detail IV of figure 1. Figures 7, 8 and 9 show respectively a side view, top view and rear view of the detail relating to a preferred variant drawn in figure 2. The device 1 comprises a manure cutter 5 connected via a valve 3 and a feed tube 4 to a tank 2 and a plurality of, for example twenty, coulters 6 each connected via a conduit 7 to an outlet 8 of manure cutter 5. Each coulter 6 is intended to open the ground, in particular meadow-land, and to form a covered channel 9 therein, into which is injected natural manure. This manure may optionally contain straw and/or other solid lumps which are cut in the manure cutter 5 to processable pellets and/or strands which do not result in blockages. The manure cutter 5 comprises a cylindrical, non-rotating holder 10 having a plurality of, for instance twenty, outlets 8 distributed over the periphery and arranged in the wall 11 in a conical, outwardly converging form. This has the advantage that the outlets are easily discharging and that cutting edges 12 of smaller than 90° are formed. The connecting conduit 7 has an inner diameter d of 25 mm (in this embodiment) and all subsequent passages have a dimension substantially equal to or greater than d . In the holder 10 a cage-like cutting member 13 is mounted rotatably in a manure chamber by means of two rings 14, which member supports on a bearing ring 15 arranged between lower flange 16 and flange 17 of the feed tube 4. The cutting member 13 is coupled by means of an easily releasable coupling 18 to a hydraulic motor 19 which can operate in two directions through a reversible valve 20. The motor 19 is fixedly connected to the cover 21. For the purpose of cleaning or, if necessary, clearing a cutter 5 that may be jammed, the cover 21 can be removed by loosening the screws 22, and a coupling arm 24 of the coupling 18 connected to the motor shaft 23 is then also removed therewith. During operation the coupling arm 24 engages onto protrusions 25 arranged on top of the upper ring 14. The cutting member 13 has a plurality of, for instance four, standing cutting knives 26 distributed over the periphery which in co-action with the cutting edges 12 cut through the manure lumps and strands. Disposed non-rotatably inside the cutting member 13 is a stationary, reverse U-shaped counter cutting member 27 that is connected to the bearing ring 15. This counter cutting member 27 has in this embodiment two counter-knives 28 which co-act for cutting with the inner cutting edges 29 of cutting knives 26. In this way slices are as it were cut off from the manure feed from which cylinder-shaped slices are as it were later pressed into the outlets 8 which are then each cut off again by the inner cutting edges 30 of cutting knives 26. Thus achieved is that no over-dimensioned lumps enter the conduits 7 and the coulter 6. Only processable manure that in principle does not result in blockages is thus injected into the ground. This leads to more uniform distribution of manure over the ground surface. The counter-knives 28 each have a thickened foot 32 which becomes narrower to the top. The device 1 has a cross beam 33 connected with swivel arms 35 to an agricultural vehicle 34, for instance a tank truck carrying the tank 2. The swivel arms are pressed down with considerable force by means of hydraulic cylinders 36 which are provided with adjusted non-return valves 38. Consoles 66 of the swivel arms 35 are joined to the agricultural vehicle 34 with height adjustable means 67. Through this height adjustment in combination with the pressure of cylinder 36 the end of coulter 6 can be held more or less deeply in the ground to control the manure flow for injection into the ground. Each coulter 6 is fixed to a coulter frame 39 which is fixed for slight pivoting to the cross beam 33 by means of front bolts 41 and rear bolts 42 provided with springs 40 and a top flange 45. Cross beam 33 has a strip 43 which grips behind a wedge-shaped carrier 44. The coulter frame 39 can thus rotate about the strip 43 in arrow direction 46 in the case the coulter 6 unexpectedly strikes against a heavy stone or the like in order to prevent damage to device 1. A rotatable cutting disc 50 is mounted rotatably and height-adjustably on the forward end of coulter frame 39. The rear part of the cutting disc 50 penetrating into the ground is accommodated in the front piece 51 of coulter 6. This front piece 51 has a standing, inclining forward edge 52 and a rearward diverging shape which pushes open the cut through grass sod. The conduit 7 connects with an oval bottom piece 54 onto the channel 9 of coulter 6 and standing in front thereof is a streamlined ground guide piece 55. For forming a channel-like manure receiving space 9 the coulter 6 has a reverse U-profile-shaped channel wall 57 with sharp bottom edges 58 which run sloping upward to the rear. Standing on the channel 57 is a ridge 58 which reaches up to ground level. Rotors 60 are disposed behind the coulters 6 for upward swivelling and coupled to coulter frame 39 by means of pivot arms 61 and optionally adjustable in lengthwise direction of the pivot arms. The rotors preferably just support on the rear ends of the ridges 58. Each rotor is provided with a scraper 63 and with stops 64, 65 for bounding its swivel movement. In figures 2 to 5 can be seen how the ground is cleaved open, how the manure receiving space is located in the ground and how the ground is re-closed. The knives 26 have a breadth b equal to or greater than the breadth of each outlet 8 so that the manure flow through the conduit 7 takes place pulse-wise. This counters blockage and the pulsating action also assists the manure distribution in the ground. The device 71 of figures 7-9 is identical to the device 1 with the exception of the following. Instead of a cylindrical pressure roller 60 a pressure rotor 72 is present at a position above the manure channel 73 of coulter 74 located in the ground, this at a distance k in front of the rear end thereof. The manure channel 73 has a roof-shaped upper wall 75. The pressure rotor 72 comprises two disc-like rotor elements 76 which are mounted rotatably about shafts 77 the axes 78 whereof enclose an obtuse angle n in the horizontal plane, the point of which angle is forward oriented (see top view of figure 8). These axes 78 moreover enclose in the vertical plane an obtuse angle m the point of which is upward oriented (see rear view of figure 9). The active edges 80 of the rotor elements 76 hereby exert a centering action according to arrows 81 on the split sods so that the sod edges are pressed shut above the channel 73. The injected manure can consequently not escape and remains in the ground. This preferred embodiment of the device 71 operates well particularly in hard clay ground. The rotor elements 76 are convex discs with outwardly bent edges, for instance as drawn. The downward pressure of the rotors 72 takes place using springs 83 with adjustable resiliency. During operation the cutting discs 50 penetrate for instance 9 cm and the front parts of the coulters 74 for instance 75 mm into the ground.

Claims: Device (1) for injecting manure into the ground comprising at least one coulter (6) adapted to extend into the ground and bounding a manure receiving space and which is connected via a conduit (7) to a manure cutter (5) consisting substantially of a manure chamber having arranged in the manure chamber wall at least one outlet which is provided with at least one knife (26) passing therealong, characterized in that the knife (26) passes between the manure chamber wall and at least one counter-knife (28). Device (1) as claimed in claim 1, characterized in that the manure chamber has a rotational body-like manure chamber wall (11) and a plurality of knives which form part of a cage-like rotatable cutting member (13) disposed upstream and adapted to the manure chamber wall (11), on the upstream side of which member at least one counter-knife (28) and preferably a plurality of counter-knives (28) is arranged. Device (1) as claimed in claim 1 or 2, characterized in that the manure chamber has distributed over its periphery a plurality of conduits (7) each connecting to a coulter and having a passage that is greater than the smallest passage of the associated manure outlet (8), wherein the knife (26) preferably has a breadth substantially corresponding with the breadth of an outlet (8) of the manure chamber. Device as claimed in any of the foregoing claims, characterized in that the cutting member (13) is provided with peripheral rings with which the cutting member (13) is rotatably mounted in the manure chamber and that the cutting member (13) is preferably mounted for free rotation in the manure chamber and is coupled via a detachable coupling (18) to the output shaft (23) of a motor (19) preferably drivable in two directions. Device (1) as claimed in any of the preceding claims, characterized in that the manure receiving space is a channel extending substantially in the direction of movement of the device (1), which channel is open at its bottom and is bounded by a substantially U-profile-shaped wall having dimensions practically equal to those of the outlet of the cutter (5) and of the conduit (7) extending between the cutter (5) and the channel. Device (1) as claimed in claim 5, characterized in that the upper part of the U-profile-shaped wall (65) is roof-shaped. Device (1) as claimed in claim 5 or 6, characterized in that a rotating cutting disc (50) cutting open the ground is present in front of the coulter (6), wherein in preference the coulter (6) at least partially accommodates the cutting disc (50). Device (1) as claimed in any of the claims 5-7, characterized in that the coulter (6) has at its front a standing slitting piece and that the conduit piece (54) extending into the ground preferably has an oval diameter. Device (1) as claimed in any of the claims 5-8, characterized in that the coulter (6) can be tilted out of the ground in the case of excessive ground resistance and is held in the ground with a set bias. Device (1) as claimed in any of the claims 5-9, characterized in that present above the channel located in the ground is at least one pressure rotor preferably consisting of at least two rotor elements which exert a closing action on split open sods, and that the rotor elements preferably rotate about axes which mutually enclose an angle.

Inventors: BOMERS BERNARDUS JOHANNES JOSE, BOMERS, BERNARDUS JOHANNES JOSEPHUS
Applicants: BOMERS BERNARDUS JOHANNES JOSE, BOMERS, BERNARDUS JOHANNES JOSEPHUS
Application year: 1991
Main classification: A01C23
IPC codes: A01C23