WO2024080888A1

WO2024080888A1 - Injection wheel of a pressure injection device for the injection of liquid fertilisers into the soil

Info

Publication number: WO2024080888A1
Application number: PCT/PL2022/050064
Authority: WO
Inventors: Karol SIENKIEWICZ
Original assignee: Przedsiębiorstwo Usługowo-Produkcyjne "Pomot" Spółka Z Ograniczoną Odpowiedzialnością
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2024-04-18

Abstract

The disclosure concerns a injection wheel of a pressurised device for injecting device for injecting liquid fertilisers into soils comprising a liquid fertiliser supply pipes connection (0), a hub (4) and, arranged radially in the wheel rim, sleeve-shaped injection pins (14) connected by a metering tube or tubes (5) to the hub connection, wherein each of the sleeve-shaped injection pins (14) has a valve located directly in the wheel rim, comprising a valve manifold (6) having a hole (7) cooperating with the wall of the hole (8) of the injector (9), which injector (9) is seated on a spring (10) seated on the wall of the hole (8) in the injector (9) and the injector (9) is terminated by a through hole (11).

Description

Injection wheel of a pressure injection device for the injection of liquid fertilisers into the soil

The object of the invention is the injection wheel of a pressurised device for the injecting liquid organic fertilisers and used as a part of devices cooperating with slurry tankers as well as with other mobile containers used for slurry tankers as well as with other mobile containers used for storage of liquid fertilisers (slurry, urea nitrate solution and others).

Crops with different structures and root systems need adequate amounts of nutrients in order to develop properly, which cannot be supplied to the soil in sufficient quantities during the establishment of a plantation for its entire lifespan. During cultivation, such plantations are surface-fertilised with artificial mineral fertilisers using the well-known specialist machinery known as fertiliser and lime spreaders, or surface-fertilised with liquid mineral fertilisers such as urea ammonium nitrate solution or organic fertilisers such as slurry using slurry tankers.

In the state of the technology, injection wheels injector devices are known. Their design incorporates injection pins fed sequentially through holes made in the hub. Such a design is shown by reference in fig.1 of the illustration. Such an open pressure system causes a significant drop in working pressure and is the main problem of inefficient operation of the system. By design, the system does not generate pressure as a result of its design and there is no element in the system that controls the fluid flow. This is because there is free flow from the beginning of the system i.e. the pump up to the pins in the injection wheels. The pressure that is generated in the system is only due to the resistance of the fluid to flow through the pipes with different cross-sections. The hub of the injection wheel is designed to allow fluid to flow continuously into the pins in such a way that the pins are fed sequentially through holes made in the hub. These holes allow fluid to flow to the pins, which are directed above the soil surface by rotation, as well as to the pins, which penetrate the soil at the same time. In summary, this is a continuous flow, which precludes the system from operating as a pressure system. As soon as the bolt goes above the soil surface, the hole in the sand moves, thereby cutting off the flow of liquid. The column of liquid, however, remains in the hose and the bolt, which is sprayed above the ground surface due to the centrifugal force of the wheel. This design means that the blind holes in the pins tend to become clogged. In addition, the distributor disc is very sensitive to contamination, due to the contact surface between the disc and the hub, which must be sufficiently rough and parallel to each other to remain tight. Any solid particles, even the smallest ones, which get between these surfaces, cause damage in the form of scratches, which results in further leakage of the system, (through its wear and tear). Such systems are depicted in publications RU195030U1, US4677921A, US4919060A, or US2876718A, among others.

The solution proposed according to the invention eliminates all the disadvantages of known systems thanks to the valve placed in the top of the pin.

The essence of the invention is the injection wheel of the pressurised device for injecting liquid fertilisers into the soil containing the connection of the of the liquid fertiliser supply line, a flow hub and bushings arranged radially distributed in the rim of the wheel sleeve injection pins connected by a dosing tube or dosing tubes to the hub connection. In the solution according to the invention, each of the sleeved injection pins has a metering valve located directly in the wheel rim, consisting of a valve manifold having a hole cooperating with the wall of the injector bore. Whereby the injector is seated on a spring supported on the wall of the injector bore. The injector is terminated with a hole through hole.

The invention in an example of realization is shown in the drawing in which fig.1 shows a reference arrangement known in the state of the art; fig.2 shows schematically the principle of operation of a device for injecting liquid organic and mineral fertilizers into the soil and fig.3 shows the construction and the principle of operation of the valve itself.

In agricultural technology for the liquid fertilisation of soils, injection wheels of injector devices such as the one shown reference in fig. 1 figure. They are characterised by the fact that the liquid to the pins 14 is supplied through a supply hole in the axis of the wheel 1 - in the distributor disc 12. This disc does not rotate, but is pressed by springs 10 against the hub 4, in which channels 13 are drilled to allow the liquid to be supplied through supply pipes 5 to the twelve pins 14 distributed around the circumference of the wheel 6. The distributor disc 12 has a bean-shaped hole 13 which acts as a valve, while the pressure of the disc also acts as a seal.

This solution works in such a way that when one of the twelve holes 13 in the hub 4 is centred by rotation with the hole 7, fluid flows into the channel in the hub 13 then into the feed line 5 and finally into the pin 14. The hole 7 is bean-shaped which causes an increase in the time during which one of the holes in the hub is supplied with fluid, i.e. while one of the holes 13 in the hub 4 is at the end of the bean, another is at the beginning of the bean. Since the time during which the spur 14 is perpendicular to the ground is very short, fluid might not be supplied in sufficient quantity to the spur 14 for this reason the spur 14 is supplied during the rotation of the wheel, all the way when it is under the ground line. The new injection wheel of a pressure injection device for injecting liquid fertilisers into soils according to the invention is shown in fig. 2. The liquid to the injection wheel is fed through the feed pipes 0 to the hole 1 in the axis of the injection wheel 2 by successively bored channels 3 made around the perimeter of the axis, so that the liquid flows to the holes in the hub 4. The channels in the hub allow the liquid to flow to the dosing tubes 5. The liquid is then directed to the valve manifold 6, in which the liquid is prepared for injection. Holes 7 in valve manifold 6 in the closed position of the valve are obstructed by the wall of hole 8 in injector 9. During wheel operation, when injector 9 in contact with the ground begins to move, in the direction of the wheel axis, spring 10 bends and the wall of hole 8 in injector 9 gradually opens the clearance of holes 7 in valve manifold 6. There is a flow of fluid through the injector 9 into the through-hole 11. While the injection wheel rotates, the injector in the absence of ground contact (pressure) moves outside the wheel along the radius reversing the process of opening the valve (i.e. its closure).

The valve fig.3. closed in the housing 15, has an internal thread in the upper part, made under the reduction 18 with external and internal threads. The reduction 18, by rotation, presses the valve manifold 6 against the sliding sleeve 17. This causes immobilisation of the internal parts of the valve, thus giving freedom of movement to the injector 9, which slides along the axis of the valve, the friction forces of the slide are reduced by the sliding sleeve 17, it also blocks the degree of freedom perpendicular to the axis of the injector 9. Sealing of the working part of the valve, i.e. holes 7 in valve manifold 6, is effected by means of turned channels 3 and gasket 21. Reduction 18 has an internal thread for tube 5, the connection is counteracted by means of washer 19 and nut 20. The valve is placed in the hole of rim 16, and blocked by rotation through frictional forces, at the threaded connection of tube 5 and reduction 18.

The solution according to the invention makes it possible to achieve the following technical and functional advantages:

• it allows a constant direct supply of injectors at a suitable, constant pressure;

• the valve function is independent of pressure, which eliminates the risk of the valve function works independently of the pressure, which eliminates the risk of self-closing of the valve under the influence of fluid pressure - the valve opens valve opens only under the influence of external pressure exerted on the injector by the ground;

• the injector is provided with pass-through holes, which eliminates the risk of clogging the hole clearance is blocked by the substrate material; • the dose of liquid is injected precisely, at the right pressure and in the right volume (dose);

• a key distinctive feature is the fact that the system operates under pressure; this is generated by a piston pump, the valves in question being a key element of the system and making it an efficient system in terms of injection precision;

• a tapered roller bearing system is used in the injection wheel, for better transmission of the injection wheel uses a tapered roller bearing system for better transmission of axial loads, frictional wear of the components, which is compensated for by a pressure screw;

• the valves are arranged radially on the wheel rim.

Furthermore, the solution according to the invention makes it possible to calculate a specific dose of fertiliser set by the operator, e.g. via the Arag or Hexagon control system. Arag or Hexagon control system.

Rafal Malujda - patent attorney

Claims

Claims The injection wheel of a pressurised device for injecting device for injecting liquid fertilisers into soils comprising a liquid fertiliser supply pipes connection (0), a hub (4) and, arranged radially in the wheel rim, sleeve-shaped injection pins (14) connected by a metering tube or tubes (5) to the hub connection, significant in that each of the sleeveshaped injection pins (14) has a valve located directly in the wheel rim, comprising a valve manifold (6) having a hole (7) cooperating with the wall of the hole (8) of the injector (9), which injector (9) is seated on a spring (10) seated on the wall of the hole (8) in the injector (9) and the injector (9) is terminated by a through hole (11).