Device for introducing a liquid into a soil

Abstract

Device for introducing a liquid into a soil (7) with a cutting disc (2) and a subsequently arranged knife (3), on which a supply line (12) with an outlet opening (13) for the liquid is arranged, characterized by that a body (9) is arranged at the end (7) of the narrow knife (3) pointing towards the ground and the outlet opening (13) is arranged directly behind and above the body (9) when viewed in the direction of work (4), wherein a free gap (15) is formed between the cutting disc (2) and the knife coulter (3), which widens towards the top.

Description

[0001] The invention relates to a device for introducing a liquid into a soil with a cutting disc and a subsequently arranged knife coulter, on which a supply line with an outlet opening for the liquid is arranged.

[0002] Such a known device is used in arable farming and grassland, whereby the device is mounted on a tractor support frame. The cutting disc cuts up the soil and the following coulter slides into the resulting slot and widens it to at least the diameter of the supply line through which the liquid is introduced into the soil for the purpose of plant protection and soil fertilization. The coulter of the known device is relatively wide, so that a great deal of pulling force is required during operation to pull the device through the soil. Furthermore, with the known device, the soil behind the coulter in the area of ​​the widened slot is disadvantageously discarded again before, for example, fertilization takes place, so that overall the fertilizer placement is ineffective.

[0003] The prior art includes, among others, DE 838 081 B, DD 54 529 A1 and US 3 294 181 A.

[0004] The object of the invention is therefore to further develop the device of the type mentioned above in such a way that the liquid is precisely deposited in the form of a concentrated, cord-like deposit and that no mixing with discarded soil occurs. Furthermore, the pulling force required during operation should also be reduced.

[0005] To achieve this object, it is proposed according to the invention that in the device according to the preamble of claim 1, a body is arranged at the end of the narrow knife coulter pointing into the ground and the outlet opening is arranged directly behind and above the body as seen in the working direction.

[0006] During operation, the narrow blade coulter creates a slit-like opening in the soil. Adjoining this slit-like opening at the bottom is a cavity with a slightly larger diameter, which is created during operation by the body and is shaped to match the body. The body can be projectile-shaped with a rounded tip, or it can be oval or square in cross-section, also with a rounded tip. The liquid for fertilization is deposited in this cavity, with the liquid being introduced from above directly behind the body as viewed in the direction of travel, so that the soil in this area has not yet been disturbed by normal soil movements. In this way, the device according to the invention can be used to precisely place a concentrated, cord-like depot of the liquid, and mixing with the soil due to soil displacement is avoided.Since the knife coulter is very narrow, about 0.8 cm to 1 cm wide, only a small pulling force is required to pull the device according to the invention through the ground, so that little energy is required.

[0007] In order to further reduce the pulling force during operation, one embodiment of the invention provides for the blade coulter to be sickle-shaped and for the body to be arranged on a blade coulter tip pointing towards the ground or into the ground. A further embodiment of the invention provides for the body to protrude beyond the blade coulter tip in the working direction. Advantageously, the body is solid and has a round, oval, or square cross-section. This creates a stable cavity for the liquid to be deposited, the bottom walls of which are stable and not yet warped when the liquid is introduced. The body can be welded to the blade coulter tip. However, the body can also advantageously be attached to the blade coulter tip in an interchangeable manner. The body can then be replaced depending on the type of soil or in the event of wear.

[0008] Especially with liquid fertilizers, it is important that the fertilizer stays in the place where it was applied and that it cannot flow off in any direction. The cavity created by the body should therefore run as horizontally as possible. A further development of the invention thus provides for the body to be arranged horizontally. The supply line expediently runs along the rear edge of the coulter blade, viewed in the working direction, to protect the supply line from damage during operation. To avoid damage, it is also advantageous for the diameter of the supply line to be the same size as or smaller than the width of the coulter blade blade.

[0009] The liquid substrates for fertilization can be free of suspended particles or contain suspended particles, which makes them viscous. If a dosing orifice is usually used to dose the liquid to be applied, then blockages of the dosing orifice can occur, particularly with viscous substrates containing suspended particles. A further development of the invention therefore provides for the supply line to be equipped with a peristaltic pump. The peristaltic pump has several rollers arranged in a circle, which are all driven via the same axis. When the peristaltic pump is in operation, the driven rollers squeeze the hose one after the other, whereby the liquid in the hose is moved towards the outlet opening. With this technology, even viscous substrates can be applied and dosed precisely, and blockage of the supply line is avoided.

[0010] To prevent the device from becoming clogged with dirt or roots during operation, a further embodiment of the invention provides a free gap between the cutting disc and the coulter blade, which widens towards the top. The increasingly large gap between the cutting disc and the coulter blade allows for better ejection of dirt and organic material.

[0011] The invention is explained in more detail below with reference to the drawing. The drawing shows an embodiment of the invention. Herein: Fig. 1 a side view; Fig. 2 a rear view after Fig. 1; and Fig. 3 another design variant with a holding arm with an angled area in a right-angled arrangement.

[0012] The device 1 has a cutting disc 2 and a coulter 3. The coulter 3 is arranged in a flush line behind the cutting disc 2, as seen in the working direction 4. The cutting disc 2 is attached to a support frame, for example of a tractor, via a movable and spring-loaded suspension 5. A holding arm 6 is also provided on this suspension 5, to which the coulter 3 is attached at its rear end, as seen in the working direction 4. To ensure that the coulter 3 runs in a flush line behind the cutting disc 2, the holding arm 6 has an angled area 16. The coulter 3 is sickle-shaped. A body 9 is attached to its coulter tip 8, which points into a ground 7. The body 9 is solid, round in cross-section and has a rounded tip. As seen in the working direction 4, the body 9 projects forward beyond the coulter tip 8 and is arranged horizontally.The knife coulter 3 has a cutting blade on its front edge 10, as seen in the working direction 4, and a supply line 12 for a liquid as fertilizer on its rear edge 11, as seen in the working direction 4. The supply line 12 ends downwards in an outlet opening 13, which is arranged directly behind the body 9, as seen in the working direction 4, and above the body 9 in such a way that the outlet opening 13 is flush with the upper edge 14 of the body 9. The diameter of the supply line 12 is smaller than the diameter of the body 9. Likewise, the diameter of the supply line 12 is smaller than the width of the rear edge 11 of the knife coulter 3. A free gap 15 is formed between the knife coulter 3 and the cutting disk 2, which gap widens towards the top to prevent blockages during operation of the device 1.When the device 1 is in operation, the cutting disc 2 cuts open the soil and the following knife coulter 3 widens the slit-like opening. The cylindrical body 9, which is located approximately 1 cm to 2 cm above the lower edge of the cutting disc 2, creates a cylindrical cavity in the soil. Before the soil can deflect again after this cavity has been created, the liquid is introduced into the cavity directly behind the body 9 via the outlet opening 13. This allows a cord-shaped deposit of the liquid to be created in the tunnel pre-formed by the body 9, without the liquid mixing with the soil during deposit. The crescent-shaped design of the knife coulter 3 also reduces the required pulling force during operation.The very close arrangement of the body 9 to the outer edge of the cutting disc 2 also prevents soil movement that would interfere with the traction force, since the body 9 runs directly behind the slot created by the cutting disc 2.

[0013] Fig. 3 shows a particularly preferred embodiment of a device according to the invention with a knife coulter 3 which always opens continuously upwards and has a supply line 12, wherein the Fig. 3 shows a top view with a free-standing coulter opening upwards.

[0014] The holding arm 6 is shown in detail here. It runs parallel to the cutting disc 2 in a partial section and has a first branch for securing the cutting disc 2.

[0015] The supply line 12 is arranged at the end of the support arm 6. The support arm 6 has a second branch, which merges into the knife coulter 3.

[0016] In order that the knife coulter 3 runs in an aligned line behind the cutting disc 2 and adhering organic material can flow off optimally, the holding arm 6 can have an angled area 16, as already described above. Fig. Figure 3 shows a variant of how this angled region 16 is designed as a rectangular arrangement to enlarge the ejection window. Alternatively, a curved arrangement (not shown) can also be provided.

Claims

[1] Device for introducing a liquid into a soil (7) with a cutting disc (2) and a subsequently arranged knife coulter (3), on which a supply line (12) with an outlet opening (13) for the liquid is arranged, characterized by , that a body (9) is arranged at the end of the narrow knife six (3) pointing into the ground (7) and the outlet opening (13) is arranged directly behind and above the body (9) as seen in the working direction (4), wherein a free gap (15) is formed between the cutting disc (2) and the knife coulter (3), which widens towards the top. [2] Device according to claim 1, characterized by that the knife coulter (3) is sickle-shaped and the body (9) is arranged on a knife coulter tip (8) pointing into the ground (7). [3] Device according to claim 1 or 2, characterized bythat the body (9) projects beyond the knife hexagon point (8) in the working direction (4). [4] Device according to one of the preceding claims, characterized by that the body (9) is solid and has a round, oval or square cross-section. [5] Device according to one of the preceding claims, characterized by that the body (9) is arranged horizontally. [6] Device according to one of the preceding claims, characterized by that the supply line (12) runs along the rear edge (11) of the knife six (3) as seen in the working direction (4). [7] Device according to one of the preceding claims, characterized by that the diameter of the supply line (12) is equal to or smaller than the width of the knife block (3). [8] Device according to one of the preceding claims, characterized by that the supply line (12) is provided with a peristaltic pump. [9] Device according to one of the preceding claims, characterized by that for fastening the knife six (3) a holding arm (6) is provided which has an angled area (16) for arranging the knife six (3) in an aligned line behind the cutting disc (2). [10] Device according to one of the preceding claims, characterized by that the angled region (16) is rectangular or curved.

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