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Title:
AUTOMATIC SOIL WATER LEVEL CONTROL METHOD AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/229887
Kind Code:
A1
Abstract:
The invention provides an automatic soil water level control system, which comprises drainage pipes, a water level control well and a float valve. The well has the following components: a housing of the well, a bottom, a cover, a side profile and a separator. The float valve has the following components: a housing of the float valve, a rear cover, a front plate, a mounting plate, a rear lever, a front lever, a float, a valve, a hinge, fasteners, a valve gasket, a valve opening to remove the air, a plate. When there is no water in the well, the float valve is opened and water flows through the drainage pipes and the float valve into the well. The separators in the well control the water level in the soil since the water level in the soil and the well is the same. The water raises the float upward, the rising float closes the valve. The water rises in the area in front of the float valve. When a lot of water accumulates, the water opens the valve due to the pressure, some water flows towards the well. There is a balance. This is how the system controls the soil water level when the relief is rough. Each float valve raises the water level in the soil area in front of the float valve.

Inventors:
MARINAS ANDRIUS (LT)
Application Number:
PCT/IB2019/058376
Publication Date:
November 19, 2020
Filing Date:
October 02, 2019
Export Citation:
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Assignee:
UAB EKODRENA (LT)
International Classes:
E02B11/00
Foreign References:
RU2636757C12017-11-28
US6277280B12001-08-21
FR848988A1939-11-09
Attorney, Agent or Firm:
ZABOLIENE, Reda (LT)
Download PDF:
Claims:
CLAIMS

1. An automatic soil water level control system having a floating mechanism and a water level control well,

characterized in that the water level control well (1 ) has the following components:

- a housing (1.1 ) of the well;

- a bottom (1.2);

- a cover (1.3);

- a separator (1.4),

- a side profile (1.5);

and a float valve (2) has the following components:

- a housing (2.1 ) of the float valve;

- a rear cover (2.2);

- a front plate (2.3);

- a mounting plate (2.4);

- a rear lever (2.5);

- a front lever (2.6);

- a float (2.7);

- a valve (2.8);

- a hinge (2.9) ;

- fasteners (2.10);

- a valve gasket (2.1 1 );

- a valve opening to remove the air (2.12);

- a screwed plate (2.13) ensuring tightness of the valve gasket.

2. The automatic soil water level control system according to claim 1 , characterized in that the housing (1.1 ) of the water level control well has a cylindrical shape with a circular cross-section, which makes the well (1 ) durable and resistant to environmental mechanical influences.

3. The automatic soil water level control system according to the preceding claims, characterized in that the water level control well (1.1 ) has the bottom (1.2) that is wider than the housing (1.1 ), therefore the well (1 ) is stable.

4. The automatic soil water level control system according to the preceding claims, characterized in that the water level control well (1 ) has a plurality of separators (1.4) which are tightly put one upon the other and can be removed.

5. The automatic soil water level control system according to claim 4, characterized in that the separators (1.4) are sleeved or otherwise fastened to the side profiles (1.5).

6. The automatic soil water level system according to the preceding claims, characterized in that a single gasket (1.4.1 ) or other sealed material is fastened across the entire perimeter of the separator (1.4) by means of plates, therefore the separators (1.4) can be tightly put one upon the other.

7. The automatic soil water level control system according to the preceding claims, characterized in that the lower separator (1.4) of the water level control well is fixedly and tightly fastened to the side profiles (1.5) and the bottom (1.2).

8. The automatic soil water level control system according to the preceding claims, characterized in that the side profile (1.5) of the water level control well has a cavity and is fastened in the well (1 ) so that the separator (1.4) can be tightly inserted into the cavity.

9. The automatic soil water level control system according to the preceding claims, characterized in that the front plate (2.3) has a threshold - the edges of the hole are risen above the front plate (2.3) - and / or have a slope at the bottom of the hole, so that no plaque forms at the bottom of the front plate (2.3), and the valve (2.8) closes tightly.

10. The automatic soil water level control system according to the preceding claims, characterized in that there is the valve gasket (2.1 1 ) around the hole of the front plate (2.3), therefore the valve (2.8) closes tightly.

1 1. The automatic soil water level control system according to claim 10, characterized in that, in some cases, there is the valve gasket (2.1 1 ) around the hole of the front plate (2.3) which is risen above the front plate (2.3), and therefore no plaque forms around the hole and the valve (2.8) closes tightly.

12. The automatic soil water level control system according to the preceding claims, characterized in that the separator gasket (1.4.1 ) is mechanically fastened by separators (1.4.3) or fastened otherwise, thereby reducing the risk of the separator gasket (1.4.1 ) losing tightness due to the water pressure.

13. The automatic soil water level control system according to the preceding claims, characterized in that the valve gasket (2.1 1 ) is mechanically fastened by means of plates (2.13) or otherwise, thereby reducing the risk of the valve gasket (2.11 ) losing tightness due to the water pressure.

14. An automatic soil water level control method using the automatic control system according to the preceding claims, characterized in that the automatic soil water level control method has the following steps:

- the soil water enters the drainage pipes and the housing (2.1 ) of the float valve;

- the valve (2.8) is opened, therefore the soil water enters the tank of the well (1 ), which has a water inlet hole (1.1.1 ) through the float valve (2);

- in the tank of the well (1 ), which has a water inlet hole (1.1.1 ), the soil water accumulates and rises until it reaches the upper separator (1.4);

- the soil water flows through the upper edge (1.4) of the upper separator to the tank of the side of the well (1 ) having the water outlet hole (1.1.2) through which it is removed;

- the soil water balance becomes steady in the soil and the well (1 );

- if the water accumulates in front of the float valve (2), the risen soil water raises the float (2.7) in the float valve (2);

- the float (2.7) closes the valve (2.8);

- the soil water rises in the soil area in front of the float valve (2);

- the risen soil water overflows resistance of the float (2.7) due to pressure into the valve (2.8), opens the valve (2.8);

- the soil water flows through the float valve (2) towards the tank of the well (1 ) having a water inlet hole (1.1 .1 );

- the float (2.7) closes the valve (2.8) because the water pressure into the valve (2.8) is reduced and the water in the float valve (2) raises the float (2.7); - the balance becomes steady: the water level in the soil area between the float valve (2) and the well (1 ), the soil water level is at the height of the top of the upper separator (1.4); and the water level in the soil area in front of the float valve (2) is risen.

15. The automatic soil water level control method according to claim 14, characterized in that the soil water level in the well (1 ) can be manually controlled by changing the number of the separators (1.4) in the well (1 ).

Description:
AUTOMATIC SOIL WATER LEVEL CONTROL METHOD AND SYSTEM

FIELD OF THE INVENTION

The invention relates to the field of the soil water level control by drainage pipes, and, in particular, a system with devices which control the soil water level by means of a float valve and a drainage well with separators.

THE RELATED ART

The invention provides a soil water level control method and a system implementing the method wherein the soil water level can be controlled automatically or manually using existing or newly constructed drainage pipes or tubes.

Document CN103953007 (published on 30 July 2014) provides a technical solution wherein the soil water level is controlled mechanically. The document describes a drainage system comprising drainage pipes and a device having a valve that can close or open the water flow. The valve opens due to the accumulated water pressure. The larger water content builds up more pressure, therefore the valve opens more widely and more water flows through. The soil water level is controlled automatically. A disadvantage of the invention is that it is not possible to drain the soil water manually quickly, therefore the soil water level control is partial. When the vertical drainage wells are high, the soil is unstable, the frost affects the well, the well stability problem occurs.

Patents CA2466976C (published on 1 1 September 2007) and US8342775 (published on 1 January 2013) describe the drainage systems that are automatically controlled by a controller. The water flow is controlled according to a predetermined date, taking into account the recurring climatic conditions every year. The problem is that the system is inflexible, when the water content passing through the soil is controlled by a predetermined date: the climate conditions and the humidity content can vary widely in different years. The automatically controlled drainage systems have the following disadvantages: they also become leaky after prolonged use due to the soil plaque or changes in pipe geometry.

Patent CN208110359 (published on 16 November 2018) provides a technical solution wherein the drainage controller can receive signals from the environment: temperature, water level or other parameters are measured. The controller electronically controls the drainage system according to the data received by closing or opening the water flow valve. However, this type of control is complicated and expensive to install. Document US2010276015 (published on 4 November 2010) describes a drainage system comprising horizontal drainage pipes and vertical wells. The water level in the wells is controlled by the plates placed in the wells, the amount of which can be changed. The water flow in the horizontal drainage pipes is controlled automatically by a floating mechanism according to the pressure into the drainage pipe valves.

Documents RU2581 195C1 (published on 20 April 2016), RU2609441 C1 (published on 1 February 2017) describe the drainage systems where the water level is controlled by floating mechanisms placed in the horizontal drainage pipes. The soil water content builds up the pressure that affects the floating mechanisms, which open or close the water flown gate. Both documents present improvements to floating mechanisms. The disadvantage of these inventions is that only floating mechanisms have been improved. The water collection well has unresolved disadvantages: its shape is not environmentally resistant, and the problem of stability and tightness of the well is not solved. Often such drainage systems become leaky after prolonged use, rubbers of separators loses tightness due to the water pressure and can be stripped off by the water pressure.

The prior art analogues found have disadvantages compared to the solution in this specification. The technical solution presented in this description does not have the aforementioned problems, and the improvements increase the efficiency and durability of the soil water control system.

SUMMARY

The invention provides an automatic soil water level control system, which has drainage pipes, a water level control well and a float valve. The well has the following components: a housing of the well, a bottom, a cover, a side profile and a separator. The float valve has the following components: a housing of the float valve, a rear cover, a front plate, a mounting plate, a rear lever, a front lever, a float, a valve, a hinge, fasteners, a valve gasket, a valve opening to remove the air, a plate. When there is no water in the well, the float valve is opened, water flows through the drainage pipes and the float valve into the well. The separators placed in the well control the water level in the soil since the water level in the soil and the well is the same. The water raises the float upward and the rising float closes the valve. The water rises in the area in front of the float valve. When there is a lot of water accumulation, the water opens the valve due to the pressure, some water is drained towards the well. There is a balance. This is how the system controls the soil water level when the relief is rough. Each float valve raises the water level in the soil area in front of the float valve.

BRIEF DESCRIPTION OF DRAWINGS

Fig. 1 shows a schematic diagram of the water level control well. Flere, 1 - the water level control well, 1.1 - the housing of the well, 1.1.1 - the well connection pipe: inlet, 1.1.2 - the well connection pipe: outflow, 1.2 - the bottom, 1.3 - the cover, 1.4 - the separator, 1.5 - the side profile.

Fig. 2 shows a schematic diagram of the separator. Flere 1.4 - the separator, 1.4.1 - the separator gasket, 1.4.2 - the separator hook, 1.4.3 - the screwed plate ensuring tightness of the separator gasket.

Fig. 3 shows a cross sectional view of the side profile. Flere 1.5 - the side profile.

Fig, 4 shows a schematic diagram of the float valve. Flere, 2 - the float valve, 2.1 - the housing of the float valve, 2.2 - the rear cover, 2.3 - the front plate, 2.4 - the mounting plate, 2.5 - the rear lever, 2.6 - the front lever, 2.7 - the float, 2.8 - the valve, 2.9 - the hinge, 2.10 - fasteners, 2.1 1 - the valve gasket, 2.12 - the valve hole to remove the air.

Fig. 5 shows the front plate of the float valve. Flere 2.3 - the front plate, 2.13 - the screwed plate ensuring tightness of the valve gasket.

Fig. 6 shows a schematic diagram of the float valve, an alternative. Flere 2.3 - the front plate, 2.4 - the mounting plate, 2.5 - the rear lever, 2.6 - the front lever, 2.7 - the float, 2.8 - the valve, 2.9 - the hinge, 2.10 - fasteners, 2.1 1 - the valve gasket ensuring tightness due to deposits.

The illustrations presented are more illustrative, the scale, proportions and other aspects do not necessarily correspond to the actual technical solution.

THE PREFERRED EMBODIMENTS

The soil water level control systems have disadvantages: the drainage well is not environmentally resistant, when the vertical drainage wells are long in height, the soil is unstable, the frost affects the well, and a well stability problem occurs. After a while, the separators lose their tightness, and the float valve does not close tightly due to plaque, its rubber parts, which are not mechanically fastened with plates or screws, can tear or become loose. Also, many systems cannot be manually controlled. The description provides an automatic soil water level control system, which addresses the above- mentioned disadvantages.

When the soil relief is rough and if soil water level is kept at the same height throughout the area, some plants will be provided with the adequate water level; some plants will run out of water because the roots of the plant will not reach the soil water; and the rest of the plants will have too much water because the roots of the plants will soak. The absolute soil water level should be different in different soil areas, i.e. the water level would be everywhere at a similar distance from the soil surface. In this case, the soil water level control system comprises the drainage pipes, the water level control well and the float valve. The drainage pipes are connected to the well, and the float valve is inserted between the drainage pipes in the soil area where the relief rises, i.e. where the soil water level needs to be raised. The float valves installed in the drainage pipe system automatically control the water flow through the drainage pipes. Improvements increase the efficiency and durability of the soil water control system. There is a water level control well that is more stable and resistant to environmental impact. The description also provides an improvement to the float valve, since structural elements of the float valve prevent plaque formation, and thus solve the problem of tightness of the valve. Additionally, improvements to separators address the problem of tightness in the water level control well.

The automatic soil water level control system described in the invention has the following interconnected parts:

- the drainage pipes;

- the water level control well (1 );

- the float valve (2).

The drainage pipes are ordinary pipes used in the drainage system to remove excess water from the soil. The drainage pipes are hollow elements that can be made of various materials, usually they are ceramic or plastic. The drainage pipes are buried in the soil where they lie horizontally or sloping. The drainage pipes are connected into a single drainage system in such a way that they form a slope, so that excess soil water is discharged into the lowest reclamation ditch or other place where the water is removed. The ceramic drainage pipes are not tightly pressed to each other in the drainage system, so that the soil water passes through the cracks between the pipes into the drainage pipes. The plastic drainage pipes are corrugated and have holes through which water enters the pipe and drains into the reclamation ditch. The described automatic soil water level control system may be adapted to existing drainage pipes or new drainage pipes may be laid.

The water level control well (1 ) (hereinafter “the well”) has the following components (Fig. 1 ):

- the housing of the well (1.1 );

- the bottom (1.2);

- the cover (1.3);

- the separator (1.4);

- the side profile (1.5).

The housing of the well (1.1 ) has a cylindrical shape which has a circular cross- section, a tube placed vertically into the soil. The housing of the well (1.1 ) can be made of a variety of materials (plastic, metal, wood, fiberglass and other natural or synthetic materials), and the housing of the well, made of PVC is usually used. The housing of the well (1.1 ) must be leak-proof and durable. An important feature of the housing of the well is that the housing of the well (1.1 ) has a cylindrical shape and therefore it is resistant to environmental impact: it does not distort or lose tightness due to moisture, cold, mechanical or other influences. At the bottom of the housing of the well (1.1 ), there is a water inlet or well connection pipe: inlet (1.1.1 ) and a water removal hole or well connection pipe: outlet (1.1.2). The drainage pipe through which the soil water from the drainage system enters the well is inserted into the water inlet or connection pipe

(1.1.1 ). The water outlet hole or outlet pipe (1.1.2) through which the soil water is removed from the well (1 ) may be open, or the drainage pipe or drainage outlet may be connected to the water outlet hole (1.1.2). In the housing of the well (1.1 ), there are the separators (1.4) inserted between the water inlet hole (1.1.1 ) and the water outlet hole

(1.1.2) which separate the housing of the well (1.1 ) into two parts. The separators (1.4) are placed vertically in such a way that the well (1 ) has two tanks and the soil water that enters the well (1.1.1 ) is not removed but it accumulates. The housing of the well (1.1 ) has a bottom (1.2) at the bottom and a cover (1.3) at the top. The top of the housing of the well (1.1 ) may have a lock so that the well (1 ) can be locked.

The bottom (1.2) of the well is a part of the housing of the well (1.1 ) at the bottom integrated into the housing (1.1 ) of the well, which closes tightly the housing (1.1 ) of the well from the bottom. The top of the bottom (1.2) is inserted into the housing (1.1 ) of the well so the diameter and shape of this section must be adapted to the diameter and shape of the housing of the well (1.1 ). The bottom part of the bottom (1.2) has a diameter that is larger than the diameter of the housing (1.1 ) of the well, so that the bottom provides stability for the well. The bottom (1.2) can be made of various materials (plastic, metal, wood, fiberglass and other natural or synthetic materials), usually the bottom (1.2) made of PVC is used. The bottom (1.1 ) of the well is fastened to the housing (1.1 ) of the well by means of metal angles, the angles can be fastened both on the outside and on the inside of the housing (1.1 ) of the well.

The cover (1.3) of the well is the part at the top of the housing (1.1 ) of the well that covers the housing (1.1 ) of the well. The diameter and shape of the cover (1.3) must be adapted to the housing (1.1 ) of the well. The cover (1.3) can be made of various materials (plastic, metal, wood, fiberglass and other natural or synthetic materials), most often the cover (1.3) made of PVC is used. The cover (1.3) is not integrated into the housing (1.1 ) of the well: the cover (1.3) can be raised and lowered. The cover (1.3) has a hook and a lock, the other part of the lock is on the housing of the well (1.1 ), so the well (1 ) can be locked. In some cases, the cover (1.3) may not have a hook (1.4.2) and / or a lock.

The separator (1.4) of the well is a plate-shaped part of the well (1 ) inserted between the side profiles (1.5) and capable of moving up / down (Fig. 2). The separator (1.4) can be made of various materials (plastic, metal, wood, fiberglass and other natural or synthetic materials), most often the separator (1.4) made of PVC is used. The dimensions of the separator (1.4) must be compatible with those of the housing (1.1 ) of the well and the side profile (1.5). The separator (1.4) must be durable to withstand the forces exerted by the water pressure and the environment and impermeable to water. The separator (1.4) is tightly inserted into the opposite side profiles (1.5). The ends of the separator, which are inserted into the side profile (1.5), are thinner than the rest part of the separator (1.4). In some cases, the ends of the separator (1.6) may have the same thickness as the separator (1 .4) itself. The separator (1.4) can be fastened to the side profile (1.5) in other ways that ensure tightness. The separator (1.4) has one or more hooks (1.4.2) that allow the separator to be inserted and raised from the well (1 ).

There is a gasket glued or otherwise fastened on one side of the separator (1.4) which is fastened to the profile by a plate (1.4.3) which ensures tightness when the separators (1.4) are placed on the top of one another and inserted into the side profile (Fig. 3). The gasket may be made of a variety of materials, the most commonly porous EPDM rubber (1.4.1 ) is used. The gasket (1.4.1 ) is glued across the entire circumference of the separator (1.4) and fastened by the plate (1.4.3). A single gasket (1.4.1 ) is usually used, but it is also possible to glue separate gasket strips to the sides of the separator (1.4). In some cases, the gasket (1.4.1 ) can cover the entire surface of the separator (1.4). The gasket (1.6.1 ) is usually slightly overhanging the separator

(1.4), but in some cases the gasket (1.4.1 ) may overlap the separator (1.4). The gasket

(1.4.1 ) is fastened by the plates (1.4.3) which press the gasket (1.4.1 ) on the separator. The plate can be made of different materials, but PVC or steel is the most common. The separator (1.4) and the plates have overlapping holes, therefore the separator (1.4) and the plate are tightened by means of bolts, nuts, washers. In some cases, the gasket

(1.4.1 ) can be located on either side of the separator (1.4).

The lower separator (1.4) is fixed, i.e. it is fixed and tightly fastened to the side profiles (1.5) and the bottom (1.2). The lower separator (1.4) is inserted vertically into the housing of the well (1.1 ) in such a way that the housing of the well (1.1 ) is separated into two tanks in which the water does not mix. In some cases, the lower separator (1.4) can be removed. The other separators (1.4) are tightly placed on the top of each other by inserting them into the side profiles (1.5). The separators (1.4) separate the housing of the well (1.1 ) into two parts in such a way that two water tanks are formed in the housing of the well (1.1 ) where the water does not mix.

The side profile of the well (1.5) is an elongated part which is fastened to the walls of the housing of the well (1.1 ) which has such shape that one side can be fitted tightly into the housing of the well (1.1 ) and on the other side there is a cavity where the separator (1.4) can be tightly inserted (Figure 3). The side profile (1.5) can be made of various materials (plastic, metal, wood, fiberglass and other natural or synthetic materials), but the aluminium side profile (1.5) is most commonly used. The side profile

(1.5) is tightly, firmly and immovably attached to the inner wall of the housing of the well

(1.1 ) in a vertical position. The side profile (1.5) has an opening and is oriented in such away that the separator (1.4) can be tightly inserted into the opening. Alternatively, the separator (1.4) can be fastened to the side profile (1.5) in other ways without inserting the separator (1.4) into the opening of the side profile (1.5). The housing (1.1 ) of the well (1.1 ) has two opposite side profiles (1.5). In some cases, the side profile in the lower part may be sealed by a plate of the shape of an inner part of the profile which may be made of various materials (plastic, metal, wood, fiberglass and other natural or synthetic materials) but most commonly the PVC material is used to prevent water from accumulating inside the profile. In the side housing, in the lower part, in the outlet section, holes may be made in order to remove water from the profile, otherwise the profiles may be broken during the frost if the water may accumulate inside the profile. The float valve has the following components (Fig. 4):

- a housing (2.1 ) of the float valve;

- a rear cover (2.2);

- a front plate (2.3);

- a mounting plate (2.4);

- a rear lever (2.5);

- a front lever (2.6);

- a float (2.7);

- a valve (2.8);

- a hinge (2.9);

- fasteners (2.10);

- a valve gasket (2.1 1 );

- a valve hole to remove the air (2.12);

- a screwed plate ensuring tightness of the valve gasket (2.13).

The housing (2.1 ) of the float valve is the part of the float valve where the other parts of the float valve are placed. The housing of the float valve (2.1 ) can be made of various materials (plastic, metal, wood, fiberglass and other natural or synthetic materials), usually made of PVC. The top part of the housing (2.1 ) of the float valve has a hole or holes (2.12) through which the air is removed from the housing (2.1 ) of the float valve. The holes shall be covered with geotextile or other cloth which prevents the soil from entering the housing (2.1 ) of the float valve. Both ends of the housing of the float valve (2.1 ) are covered by the rear cover (2.2).

The rear cover (2.2) is the part of the float valve (2) which covers the ends of the housing (2.1 ) of the float valve. The diameter and shape of the rear cover (2.2) must be identical to the diameter and shape of the housing (2.1 ) of the float valve. The rear cover (2.2) has a hole through which it is connected to a drainage pipe or PVC pipe. The rear cover (1.4) can be made of a variety of materials, most often PVC is used. The rear cover (1.4) connects the float valve on both sides with the drainage pipe or PVC pipe and prevents the soil from entering the housing of the float valve (2.1 ).

The front plate (2.3) is a part of the float valve (2), which fits tightly into the housing of the float valve (2.1 ) (Fig. 5). The front plate (2.3) must have the same shape and diameter as the housing of the float valve (2.1 ). The front panel (2.3) can be made of various materials, usually made of PVC. The front plate (2.3) has a hole that can be closed or opened by the valve. There is a gasket (2.11 ) around the hole, which is needed to seal the hole in the valve (2.8), and the gasket is glued and fastened by plates (2.13). The gasket can be made of various materials, most often a rubber gasket is used. The front plate (2.3) has a threshold - the hole is risen above the edge of the front plate (2.3). The part of the front plate (2.3) located between the edge of the front plate (2.3) and the hole may have a slope. The thresholds and slopes are needed to prevent plaque formation at the bottom of the front panel (2.3) and to close tightly the hole in the valve (2.8). In one embodiment, a rubber or other resilient material (2.1 1 ) is provided around the hole in the front plate (2.3) and is risen around the hole in the front plate (2.3) (Fig. 6). This shape of rubber also prevents plaque formation at the bottom of the front plate (2.3) and the valve (2.8) covers tightly the hole.

The mounting plate (2.4) is the part of the float valve (2) which is mounted on the inside of the housing of the float valve (2.1 ) at the top. The mounting plate (2.4) comprises the parts of the float valve (2) that control the movement of the float (2.7) and the valve (2.8). The mounting plate (2.4) can be made of different materials, the most commonly the mounting plate made of PVC (2.4) is used.

The rear lever (2.5) is the part of the float valve (2) fixed to the mounting plate (2.4). One end of the rear lever (2.5) is connected to the mounting plate (2.4) and the other end to the front lever (2.6). Both joints are flexible, therefore the rear lever (2.5) can move up and down. The rear lever (2.5) can be made of a variety of materials, the most common the rear lever (2.5) of PVC is used.

The front lever (2.6) is the part of the float valve (2) with one end fastened to the rear lever (2.5) and the other end to the valve (2.8). The front lever (2.6) is flexibly connected to the rear lever (2.5), allowing the front lever (2.6) to move upward, thereby moving the front lever (2.6) to open the valve (2.8) that opens or closes the hole in the front panel (2.6). 2.3). The front lever (2.6) can be made of various materials, usually made of PVC.

The float (2.7) is the lighter-than-water part of the float valve (2), which is fastened to the rear lever (2.5) and the front lever (2.6). The float (2.7) can be made of a variety of materials that are lighter than water, the most commonly a float made of non absorbent foam (2.7) is used. The soil water raises or lowers the float (2.7). When it moves up or down, the float (2.7) moves the front lever (2.6) connected to the valve (2.8), which opens or closes the hole in the front panel (2.3). As the float (2.7) rises, the valve (2.8) closes the hole in the front panel (2.3); when the float (2.7) is lowered, the valve (2.8) opens the hole in the front panel (2.3). The valve (2.8) is the part of the float valve (2) fastened to the front lever (2.6) and the hinge (2.9). The valve (2.8) can be made of a variety of materials, the most commonly the valve (2.8) made of PVC is used. The valve (2.8) controls the flow of the soil water through the float valve (2) and drainage pipes by closing or opening the hole in the front plate (2.3). When the valve (2.8) is lowered, it presses against the gasket (2.1 1 ), tightly covers the hole and prevents the soil water. When the hole is uncovered, the soil water flows through it.

The fasteners (2.10) are elements that connect or fasten parts of the float valve (2) together. The fasteners (2.10) are usual elements used in plumbing to connect or fasten items: a bolt, a nut, a washer, a screw, a nozzle and so on.

The soil water level is controlled automatically and manually. When the soil relief is smooth, the automatic soil water level control system comprises drainage pipes and a well (1 ). The drainage pipes are connected to a single system and lie slightly on the soil. At the lowest point of the relief there is a well (1 ) to which the drainage pipe system is connected. The well (1 ) has a drainage hole or connection pipe (1.1.2) through which the soil water flows from the well (1 ) into the drainage ditch or elsewhere. When the lower separator (1.5) is only in the well (1 ), the maximum amount of the soil water is removed from the soil. The amount of water entering the well (1 ) through the water inlet or connection pipe (1.1.1 ) is immediately discharged through the water outlet or connection pipe (1.1.2). The separators (1.4) may be manually inserted into the well (1 ). The separators (1.4) are put tightly on top of each other, no water can pass. When the separators (1.4) are added to the well (1 ), the soil water flowing through the drainage pipes will accumulate in the well (1 ). In the well (1 ), the water level rises on the side of the housing (1.1 ) where there is a water inlet or connection pipe (1.1.1 ). When the soil water reaches the top of the upper separator (1.4), the water flows through the top of the upper separator (1.4), enters the side of the housing (1.1 ) where the water outlet hole (1.1.2) is located and is removed. Water below the top of the upper separator (1.4) is not removed from the well (1 ). Since the water in the well (1 ) and the soil are like communicating vessels, the water is not removed from the soil either. In this case, the soil water is maintained at the height of the top of the upper separator (1.4). The water level in the soil can be controlled by changing the amount of separators (1.4) in the well (1 ). When heavy machinery has to enter the fields, e.g. during spring tillage, a part of the separators (1.4) can be removed manually to lower the soil water level for a short time. When the soil is cultivated, the plants need water to grow, therefore the separators (1.4) are added manually and the soil water level is raised. The soil water level can be controlled in other cases as well. For example, when some of the separators (1.4) are removed after a heavy rainfall, excess water can be quickly drained. When the separators (1.4) are inserted, the soil water level is raised again.

When the soil relief is rough and if soil water level is kept at the same height throughout the area some plants will be provided with the adequate water level; some plants will run out of water because the roots of the plant will not reach the soil water; and the rest of the plants will have too much water because the roots of the plants will soak. The absolute soil water level should be different in different soil areas, i.e. the water level would be everywhere at a similar distance from the soil surface. In this case, the float valve (2) is used in addition to the drainage pipes and well. The drainage pipes are connected to the well (1 ) as described above. The soil water level in the relief area where the relief rises, the soil water level also needs to be raised. Therefore, the float valve (2) is normally placed on the drain collector at this point. When there is no water in the well (1 ), the float valve (2) is opened, all water flows through the float valve (2). When the water appears in the soil, it passes through the drainage pipes and the float valve (2) to the well (1 ). In the well (1 ), the soil water accumulates, rises and maintains the soil water level at the height of the upper edge of the upper separator (1.4) of the well. The soil water also accumulates in the drainage pipes, and thus in the float valve (2), until it reaches the float (2.7). The float (2.7) rises and closes the valve (2.8). When the float (2.7) is fully risen, the valve (2.8) is also fully closed. In this case, the float valve (2) closes the soil water flow through the drainage pipes, therefore the soil water level is different in front of and behind the float valve (2). Between the float valve (2) and the well (1 ), there is the soil water level similar to the water level in the well (1 ). In front of the float valve (2), the soil water level is higher because the water is not removed by drainage pipes. In this way, the float valve (2) raises the soil water level in the drainage system. When the soil water level is raised to the set height, the water accumulated builds up pressure before the float valve (2), causing the valve (2.8) to open and some of the water to drain into the well, where it is removed (1 ). When the soil water level before the float valve (2) rises, the valve (2.8) is closed. The float valve (2) is so designed that there is a balance between the water pressure in the soil before the float valve (2) and the lifting capacity of the float (2.7). By increasing the lifting capacity of the float (2.7), the water level in the soil before the float valve (2) will increase accordingly. Thus, the valve (2.8) is opened or closed by two forces acting in opposite directions, and when they converge, a corresponding rise in the soil water level is maintained in front of the float valve (2). The higher soil water level upstream of the float valve (2) does not adhere exactly to the float valve (2), some of the water flows above the float valve (2). Therefore, several float valves (2) are required to raise the soil water level significantly in the drainage system, depending on the difference in heights of the relief.

The automatic soil water level control method has the following steps:

- the soil water enters the drainage pipes and the housing (2.1 ) of the float valve;

- the valve (2.8) is opened, therefore the soil water enters the tank of the well

(1 ) which has a water inlet hole (1.1.1 ) through the float valve (2);

- in the tank of the well (1 ), which has a water inlet hole (1.1.1 ), the soil water accumulates and rises until it reaches the upper separator (1.4);

- the soil water flows through the upper edge (1.4) of the upper separator to the side of the well (1 ) having the water outlet hole (1.1.2) through which it is removed;

- the soil water balance becomes steady in the soil and the well (1 );

- if the water accumulates in front of the float valve (2), the soil water raises the float (2.7) in the float valve (2);

- the float (2.7) closes the valve (2.8);

- the soil water rises in the soil area in front of the float valve (2);

- the risen soil water overflows resistance of the float (2.7) due to the pressure in the valve (2.8) and opens the valve (2.8);

- the soil water flows through the float valve (2) into the tank of the well (1 ) having a water inlet hole (1.1 .1 );

- the float (2.7) closes the valve (2.8) because the pressure of the water into the valve (2.8) is reduced and the water in the float valve (2) raises the float (2-7);

- the balance becomes steady: in the soil area between the float valve (2) and the well (1 ), the soil water level is at the height of the top of the upper separator (1.4); and the water level in the soil area in front of the float valve

(2) is risen.

Thus, when the soil relief is smooth, the automatic soil water level control system has drainage pipes and the water level control well (1 ). When the soil relief is rough, the automatic soil water level control system has drainage pipes, the water level control well (1 ) and the float valve (2). The number of float valves (2) depends on the soil relief: the greater the differences in height, the more the system will need float valves (2) to maintain the soil water level in the area of the root of the plant. Thus, drainage pipes, the well (1 ) and float valves (2) allow water to remain in the soil in the area of roots of the plant during the dry season and, after rainfall or otherwise, excess water can be quickly drained. The soil water level is controlled both automatically and manually by removing or adding separators (1.4).

A specific example showing, but not limited to, the number of float valves (2) is given below. If, in the case described, the relief on which the drainage system is installed is rough, the automatic soil water level control system comprises drainage pipes, a well (1 ) and float valves (2). The number of float valves (2) depends on the soil relief. If there is a 90 cm difference in height in the drainage system, 3 float valves (2) should be installed, each rising by 30 cm.

The following examples provide an automatic soil water level control system. In order to illustrate and describe the invention, the description of the preferred embodiments is presented above. The dimensions, materials, method of connection, number of parts themselves and other parameters of the system provided in the description may vary - the description should be viewed as an illustration and not as a limitation. This is not a detailed or restrictive description to determine the exact form or embodiment. The above description should be viewed more than the illustration, not as a restriction. It is obvious that specialists in this field can have many opinions on modifications and variations. The embodiment is chosen and described in order to best understand the principles of the invention and their best practical application for the various embodiments with different modifications suitable for a specific use or implementation adaptation. It is intended that the scope of the invention is defined by the definition added to it and its equivalents, in which all of these definitions have meaning within the broadest limits, unless otherwise stated.

In the embodiments described by those skilled in the art, modifications may be made without deviating from the scope of this invention as defined in the following definition.