NL2024011B1 - Device for a sub-irrigation system, sub-irrigation system and field comprising the device and/or the sub-irrigation system - Google Patents

Abstract

Device (1) comprising: - a valve arrangement (3) comprising a valve organ (5), wherein said valve arrangement (3) is arranged for in a first condition of said valve organ (5) allowing said water, via said valve arrangement (3), to be delivered to a water delivery organ (107) and arranged for in a second condition of said valve organ (3) blocking delivery of said water, via said valve arrangement (3), to said water delivery organ (107); - a detection arrangement (7) comprising a buoyance organ (9), wherein said detection arrangement (7) is arranged for detecting a ground water level (109), by floatation of said buoyance organ (9) during use of said device (1) in ground water, below a surface level (111) of a field (103), wherein said buoyancy organ (9) is coupled to said valve arrangement (3) such that said valve organ (5) is in said first condition or in said second condition in dependence of a position of said buoyance organ (9); - a control arrangement (11) arranged for changing a weight of at least one of said buoyance organ (9) and said valve organ (5) when said detection arrangement (11) detects that said ground water level (109) is below a predetermined ground water level such that said valve organ (5) is moved from said second condition to said first condition.

Description

Title: Device for a sub-irrigation system, sub-irrigation system and field comprising the device and/or the sub-irrigation system

DESCRIPTION According to a first aspect, the present disclosure relates to a device for a sub-irrigation system. According to a second aspect, the present disclosure relates to a sub- irrigation system comprising a device according to the first aspect of the present disclosure. According to a third aspect, the present disclosure relates to a field comprising a device according to the first aspect of the present disclosure and/or comprising a sub-irrigation system according to the second aspect of the present disclosure. The device according to the first aspect is arranged for receiving water from a water supply and arranged for being connected for fluid flow to a water delivery organ for delivering said water, via said water delivery organ, to said field below a surface level of said field. The device may comprise a valve arrangement comprising a valve organ, wherein said valve arrangement is arranged for in a first condition of said valve organ allowing said water, via said valve arrangement, to be delivered to said water delivery organ and arranged for in a second condition of said valve organ blocking delivery of said water, via said valve arrangement, to said water delivery organ. Providing a valve arrangement is beneficial for allowing or prevent delivery of water, by the device, to the water delivery organ. The device may further comprise a detection arrangement comprising a buoyance organ, wherein said detection arrangement is arranged for detecting a ground water level, preferably by floatation, during use of said device, of said buoyance organ in ground water, below said surface level of said field, wherein said buoyancy organ is coupled to said valve arrangement such that said valve organ is in said first condition or in said second condition in dependence of a position of said buoyance organ. By providing the buoyancy organ such that the buoyancy organ may float, during use of the device, in the ground water a relative reliable detection of the ground water level may be achieved for bringing the valve organ in the first condition or the second condition. The device may further comprise a control arrangement arranged for changing a weight of at least one of said buoyance organ and said valve organ when said detection arrangement detects that said ground water level is below a predetermined ground water level such that said valve organ is moved from said second condition to said first condition. Changing a weight of at least one of the buoyance organ and the valve organ is beneficial for realising a relative large displacement of the valve organ in dependence of a relative small initial change in position of the buoyance organ. A relative large displacement of the valve organ is beneficial for providing a relative compact device while realising a relative large flow rate of water from the water supply, via the device, to the water delivery organ. The present disclosure relies at least partly on the insight that a relative small difference in the ground water level and the predetermined ground water level may correspond to a relative large amount of water required to achieve the predetermined ground water level given the size of the field. Realising a relative large flow rate of water into the sub-irrigation system, via the device, is beneficial for realising a predetermined ground water level in a relative short time period.

A further advantage is that the device according to the present disclosure allows the sub-irrigation system as well as the device, due to the relative large flow rate, to be provided with fluid flow means having a relative small cross- section.

In a practical situation, the buoyance organ will change position when the ground water level, ie. an actual ground water level, drops slightly below the predetermined level. The change in position of the buoyance organ results in a change of the weight of at least one of the valve organ and the buoyance organ thereby causing a relative large displacement of the valve organ for realising the relative large flow rate.

An additional advantage of the device according to the present disclosure is that a relative reliable movement of the valve organ from the second condition into the first condition may be realised.

The present disclosure further at least partly relies on the insight that the valve organ may remain in the second position when the ground water level drops slightly below the predetermined level if the weight of the valve organ and/or the buoyance organ is maintained constant.

Changing the weight of at least one of the valve organ and the buoyance organ may cause a relative large force to act on the valve organ for reliably moving the valve organ from the second into the first condition.

In an embodiment of the device according to the present disclosure, said detection arrangement is arranged for detecting a ground water level, preferably by floatation of said buoyance organ, during use of said device, in a fluid having a surface level that is related said ground water level, preferably by floatation of said buoyance organ during use of said device in a fluid having a surface level that is identical to said ground water level.

This is beneficial for avoiding the risk of pollution of the detection arrangement or the buoyance organ that may affect the accuracy and/or reliability of the device.

Preferably, said control arrangement is arranged for reducing a weight of said valve organ when said detection arrangement detects that said ground water level is below said predetermined ground water level.

This is preferred for realising a relative reliable movement of the valve organ from the second condition into the first condition.

It is beneficial, if said device comprises a lever arranged for pivoting about a pivot axis, wherein said valve organ is coupled at a first location to said lever and said buoyance organ is coupled at a second location to said lever, wherein said first location and said second location are at opposite sides of said pivot axis.

This is beneficial for coupling the buoyance organ in a relative robust and reliable manner to the valve organ.

In this regard, it is advantageous if said detection arrangement comprises a connecting arrangement connecting said buoyance organ to said lever at a nominal distance, wherein said connecting arrangement is arranged for allowing a length of said connecting arrangement to vary within a predetermined range about said nominal distance for varying a distance between said buoyancy organ and said second location.

In a practical embodiment of the device according to the first aspect of the present disclosure, said valve organ comprises a receiving space arranged for holding water and comprises a receiving opening for allowing said water to enter said receiving space. Such a receiving space is beneficial for allowing to accumulate water, by the valve organ, and thereby changing a weight of the valve organ. Since the water level of the water supply, during use of the device, may be higher than a water level in the receiving space, water may be brought into the receiving space without the need for providing a pump to increase the weight of the valve organ.

Preferably, said control arrangement comprises a weight control valve arranged for in a first condition of said weight control valve allow said water to flow out of said receiving space, preferably via an outlet opening thereof, for lowering said weight of said valve organ, preferably while said receiving opening is closed by said weight control valve.

The water level of the water supply, during use of the device, may be higher than the ground water level. This allows for removal of water from the receiving space via the outlet opening without the need for a pump to reduce the weight of the valve organ.

In this regard, it is beneficial if said weight control valve is arranged for in a second condition of said weight control valve allowing water to enter said receiving space via said receiving opening for increasing said weight of said valve organ, preferably while said outlet opening is closed by said weight control valve.

Preferably, said weight control valve comprises an urging element for urging said weight control valve from said first condition into said second condition.

In this regard, it is beneficial if said urging element comprises a spring. Preferably, said valve organ comprises an inner tube and an outer tube, wherein said inner tube and said outer tube have mutually different diameters and said 5 inner tube is at least partly provided in an inner space of said outer tube. Preferably, an outer wall surface of the inner tube and an inner wall surface of the outer tube delimit at least partly said receiving space.

Preferably, said receiving opening is provided in a wall of said outer tube and said outlet opening is provided in a wall of said inner tube.

In this regard, it is beneficial if said device comprises an actuation arrangement for bringing said weight control valve in said first condition or said second condition of said weight control valve in dependence of said position of said buoyancy organ.

Preferably, said detection arrangement comprises an adjustment arrangement for adjusting said predetermined ground water level.

Preferably, said adjustment arrangement is arranged for setting said nominal distance. Preferably, said adjustment arrangement comprises an actuator arranged for setting said nominal distance.

In this regard, it is advantageous if said device comprises a controller arranged for controlling said actuator for setting said nominal distance.

In an embodiment of the device according to the first aspect of the present disclosure, said controller comprises wireless receiving means for wirelessly receiving said predetermined ground water level, wherein said controller is further arranged for controlling said actuator taking into account said received predetermined ground water level for setting said nominal distance.

In this regard, it is preferred if said device further comprises a mobile User Equipment, UE, which mobile UE comprises a setting unit for setting said predetermined ground water level, and wherein said mobile UE comprises wireless transmitting means arranged for wirelessly transmitting said predetermined ground water level to said wireless receiving means of said controller.

In an embodiment of the device according to the first aspect of the present disclosure, said controller comprises wireless transmitting means for wirelessly transmitting a detected ground water level to said wireless receiving means of said mobile UE.

In this regard, it is preferred if said mobile UE comprises wireless receiving means arranged for wirelessly receiving said detected ground water level from said wireless transmitting means of said controller.

According to the second aspect, the present disclosure relates to a sub- irrigation system for a field comprising a device according to the first aspect of the present disclosure, said sub-irrigation system further comprising a water supply coupled for fluid flow with said device for supplying water to said device and comprising a water delivery organ for delivering said water, via said device, to said field below a surface level of said field, preferably below a ground water level of said field.

Embodiments of the sub-irrigation system according to the second aspect of the present disclosure correspond to embodiments of the device according to the first aspect of the present disclosure. The advantages of the sub-irrigation system according to the second aspect of the present disclosure correspond to the advantages of the device according to the first aspect of the present disclosure presented previously.

Preferably, said sub-irrigation system further comprises a sub-irrigation outlet arrangement coupled for fluid flow to said water delivery organ at a distance from said device, wherein said sub-irrigation outlet arrangement is arranged for in a first condition of said sub-irrigation outlet arrangement allowing water to drain, via said sub-irrigation outlet arrangement and said water delivery organ, from said field and in a second condition of said sub-irrigation outlet arrangement blocking drainage of said water, via said sub-irrigation outlet arrangement and said water delivery organ, from said field.

Preferably, said sub-irrigation outlet arrangement comprises a further actuator arranged for bringing said sub-irrigation outlet arrangement in said first condition thereof and/or said second condition thereof.

In this regard, it is advantageous if said sub-irrigation outlet arrangement comprises a further controller arranged for controlling said further actuator for bringing said sub-irrigation outlet arrangement in said first condition thereof and/or said second condition thereof. In this regard, it is beneficial if said further controller comprises further wireless receiving means for wirelessly receiving an input for bringing said sub- irrigation outlet arrangement in said first condition or second condition, wherein said further controller is further arranged for controlling said further actuator taking into account said received input for bringing said sub-irrigation outlet arrangement in said first condition or second condition.

In this regard, it is preferred if said mobile UE comprises a further setting unit for setting said sub-irrigation outlet arrangement to said first condition or said second condition, and wherein said UE comprises further wireless transmitting means arranged for wirelessly transmitting said condition set for said sub-irrigation outlet arrangement to said further wireless receiving means of said further controller. Preferably, the water delivery organ is arranged for delivering said water, via said water delivery organ, to said field below a ground water level of said field.

According to the third aspect the present disclosure relates to a field comprising a device according to the first aspect of the present disclosure and/or comprising a sub-irrigation system according to the second aspect of the present disclosure.

Embodiments of the field correspond to embodiments of the device and/or the sub-irrigation system according to the present disclosure. The advantages of the field correspond to the advantages of the device and/or the advantages of the sub-irrigation system according to the present disclosure presented previously.

According to a fourth aspect the present disclosure relates to a device for a sub-irrigation system, wherein said device is arranged for receiving water from a water supply and arranged for being connected for fluid flow to a water delivery organ for delivering said water, via said water delivery organ, to a plant root zone, said device comprising: - a valve arrangement comprising a valve organ, wherein said valve arrangement is arranged for in a first condition of said valve organ allowing said water, via said valve arrangement, to be delivered to said water delivery organ and arranged for in a second condition of said valve organ blocking delivery of said water, via said valve arrangement, to said water delivery organ; - a detection arrangement comprising a buoyance organ, wherein said detection arrangement is arranged for detecting a plant root zone water level, preferably by floatation of said buoyance organ during use of said device, wherein said buoyancy organ is coupled to said valve arrangement such that said valve organ is in said first condition or in said second condition in dependence of a position of said buoyance organ; - a control arrangement arranged for changing a weight of at least one of said buoyance organ and said valve organ when said detection arrangement detects that said plant root zone water level is below a predetermined water level such that said valve organ is moved from said second condition to said first condition. Embodiments of the device according to the fourth aspect of the present disclosure correspond to embodiments of the device according to the first aspect of the present disclosure. The advantages of the device according to the fourth aspect of the present disclosure correspond to embodiments of the device according to the first aspect of the present disclosure presented previously.

Within the context of the present disclosure, the plant root zone is to be understood as an area surrounding roots of a plant. The plant root zone water level is to be understood as a water level of the plant root zone.

According to a fifth aspect, the present disclosure relates to a sub- irrigation system comprising a device according to the fourth aspect of the present disclosure, said sub-irrigation system further comprising a water supply coupled for fluid flow with said device for supplying water to said device and comprising a water delivery organ for delivering said water, via said device, to said plant root zone.

Embodiments of the sub-irrigation system according to the fifth aspect correspond to embodiments of the sub-irrigation system according to the second aspect of the present disclosure. The advantages of the sub-irrigation system according to the fifth aspect of the present disclosure correspond to the advantages of the sub-irrigation system according to the second aspect of the present disclosure presented previously. The present disclosure will now be explained by means of a description of preferred embodiments of a device, a sub-irrigation system and a field according to the present disclosure, in which reference is made to the following schematic figures, in which: Fig. 1: a cross-section of elements of a sub-irrigation system according to the second aspect of the present disclosure are shown; Fig. 2: a top view of the elements from Fig. 1 are shown; Fig. 3: a cross-section of a device according to the first aspect and the fourth aspect of the present disclosure is shown; Fig. 4: a top view of the device from Fig. 1 is shown; Fig. 5: a top view, in cross-section, of a field according to the third aspect of the present disclosure is shown; Fig. 6: a side view, in cross-section, of the field from Fig. 5 is shown. Sub-irrigation system 101 is provided in a field 103 having a surface level 111. The sub-irrigation system 101 comprises a water supply 105 having a water level 110 that is above a ground water level 109 of the field 103. The water present in the water supply 105 may for instance originate from a canal and be brought at an elevated level 110 in the water supply 105 via a pump (not shown). The water supply 105 is coupled for fluid flow, via a water supply organ 115, with a device 1. The device 1 is arranged for receiving the water from the water supply 105 via the water supply organ 115. The device 1 is further coupled to a water delivery organ 107. The water delivery organ 107 comprises a plurality of drain elements 117 that are connected to a main delivery element 119 for delivering the water, via the device 1, below the ground water level 109 of the field 103.

Sub-irrigation system 101 further comprises a sub-irrigation outlet arrangement 113 and a measurement drain 131. The sub-irrigation outlet arrangement 113 is coupled for fluid flow, via a main drain element 121, to the water delivery organ 107 at a distance from the device 1. A vertical position of the water delivery organ 107 is such that the water may drain from the water delivery organ 107 into a water disposal 123 without the need for a pump. A water level of the water disposal 123 is below the water level of the water supply 105. The sub-irrigation outlet arrangement 113 comprises an outlet valve organ 129 that may be brought into a first condition from a second condition and into the second condition from the first condition. In the first condition of the outlet valve organ 129, water may drain from the sub-irrigation outlet arrangement 113 into the water disposal 123. In the second condition of the outlet valve organ 129, water is blocked from exiting the water delivery organ 107 via the sub-irrigation outlet arrangement 113. The measurement drain 131 is connected to the device 1 for allowing the device 1 to detected the ground water level 109. Device 1 comprises a valve arrangement 3, a detection arrangement 7 and a control arrangement 11. Valve arrangement 3 comprises a valve housing 31. The valve housing 31, at an end thereof, is arranged for being connected for fluid flow with the water deliver organ 107. Valve housing 31 is formed from a round tube provided with a water inlet opening 33 for allowing water, via the water supply organ 115, to enter the device 1. The valve arrangement 3 further comprises a valve organ

5. The valve organ 5 is movable relative to the valve housing 31 in an operating direction X. By moving the valve organ 5 relative to the valve housing 31 in the operating direction X, the valve arrangement 3 may be brought in a first condition wherein the valve organ 5 allows water to enter the valve housing 31 from the water supply organ 115. In a second position of the valve organ 5, the valve organ 5 is cooperating with a valve seat 35 provided in the valve housing 31 for closing the water inlet opening 33 for water. The valve organ 5 is provided with a closing seal 57 for the cooperation with the valve seat 35. The valve organ 5 comprises an inner tube 41 and an outer tube 39 having different diameters that are provided concentrically. An outer wall surface of the inner tube 41 and an inner wall surface of the outer tube 39 delimit at least partly a receiving space 19 that is closed at a, during use, bottom end part of the inner tube 41 and the outer tube 39 by a valve seal 37. Closing the bottom end part, by the valve seal 37, arranges the receiving space 19 for holding water. The outer tube 39, in a wall thereof, is provided with a receiving opening such that water originating from the water supply 105 may enter the receiving space 19 and the receiving space 19 may be filled with water up to a level that is substantially equal to the water level of the water supply 105 without the need for a pump. The inner tube 41 and the outer tube 39 are maintained at a mutual distance by the valve seal 37 and fastening means 43. The fastening means 43 may be formed by general available means such as nuts and bolts. The detection arrangement 7 comprising a buoyance organ 9 and a detection housing 45. The buoyance organ 9 is provided in an inner space 47 of the detection housing 45. The detection housing 45, near a, during use, lower end face thereof, is provided with a measurement opening 49 for allowing the measurement drain 131 to be connected for fluid flow with the inner space 47 of the detection housing

45. During use, ground water below the surface level 111 of the field 103 may enter the inner space 47 via the measurement opening 49 and cause a water level in the detection housing 45 to correspond to the ground water level of the field 103. The buoyance organ 9 is arranged to float on the ground water present in the inner space

47.

Device 1 comprises a lever 15 arranged for pivoting about a pivot axis

17. The valve organ 5 is coupled at a first location to the lever 15. The buoyance organ 9 is coupled, via a connecting arrangement 25, at a second location to the lever 15 such that the first location and the second location are at opposite sides of the pivot axis 17. The lever 15 is further provided with a balancing weight 51 that is moveable relative to the pivot axis 17 for positioning the balancing weight 51 at a predetermined position from the pivot axis 17 for balancing the lever 15. In an alternative embodiment of the device it is conceivable to balance the lever by changing a mass of the weight in addition to or as an alternative to moving the balancing weight 51. The connecting arrangement 25 connects the buoyance organ 9 to the lever 15 at a nominal distance n. The connecting arrangement 25 is further arranged for allowing a length of said connecting arrangement 25 to vary within a predetermined range about said nominal distance n for varying a distance between the buoyancy organ 9 and the second location. In other words, the buoyancy organ 9 may move relative to the detection housing 45 within the predetermined range independent from the lever 15. The nominal distance n may be set, by an actuator 27, for setting a predetermined ground water level. By setting the predetermined ground water level, the sub-irrigation system 101 comprising device 1 will maintain providing water to the field 103 from the water supply 105 until an actual ground water level 109 is substantially equal, preferably equal, to the predetermined ground water level.

Control arrangement 11 is arranged for changing a weight of the valve organ 5 when the detection arrangement 11 detects that the ground water level 109 is below the predetermined ground water level. The control arrangement 11 comprises a weight control valve 21. The weight control valve 21 is provided in an outlet opening provided in a wall of the inner tube 37 and in the receiving opening provided in the wall of the outer tube 39 such that upon opening of the outlet opening, by the control valve 21, water present in the receiving space 19 may exit the receiving space 19 via the weight control valve 21 and the outlet opening and thereby reducing the weight of the valve organ 5. For this purpose the weight control valve 21 is arranged for in a first condition of the weight control valve 21 allow water to flow out of the receiving space 19, via the outlet opening, for lowering the weight of the valve organ 5. In a second condition of the weight control valve 21 water present in the receiving space 19 is blocked from exiting the receiving space 19 via the outlet opening thereby allowing to hold water in the receiving space for realising and/or maintaining a relative high weight of the valve organ 5. The weight control valve 21 is connected, via an actuation arrangement 23, to the buoyancy organ 9. The actuation arrangement 23 comprises a steel cable 53 to is movably held in an outer jacket 55. At a first end thereof, the outer jacket 55 is stationary connected relative to said lever at or near said second position. At a second end thereof, the outer jacket 55 is stationary connect to the valve organ

5. The steel cable 53, at first end thereof, is connected to the connecting arrangement 25 such that a movement of the buoyance organ 9 relative to the lever 15 causes the steel cable 53 to move relative to the outer jacket 55. At a second end thereof, the steel cable 53 is connected to the weight control valve 21 such that the actuation arrangement 23 is arranged for bringing the weight control valve 21 in the first condition or the second condition of the weight control valve 21 in dependence of the position of the buoyancy organ 9 relative to the detection housing 45.

Device 1 further comprises a controller 29 and a mobile User Equipment, UE. The controller 29 is arranged for controlling the actuator 27 for setting the nominal distance n. The controller 29 comprises wireless receiving means (not shown) for wirelessly receiving a set predetermined ground water level.

The sub-irrigation outlet arrangement 113 comprises a further controller 133 and a further actuator 135. The further actuator 135 is arranged for bringing the sub-irrigation outlet arrangement 113, respectively, from the second condition into the first condition and from the first condition into the second condition. The further controller comprises further wireless receiving means for wirelessly receiving an input for bringing the sub-irrigation outlet arrangement 113 in the first condition or the second condition. The further controller 133 is arranged for controlling the further 135 actuator taking into account the received input for bringing the sub-irrigation outlet arrangement 113 in the first condition or the condition.

The mobile UE comprises a setting unit for setting the predetermined ground water level and a further setting unit for setting a condition of the sub-irrigation outlet arrangement 133 to the first condition or the second condition. The UE comprises wireless transmitting means arranged for wirelessly transmitting the predetermined ground water level to the wireless receiving means of the controller 29 and comprises further wireless transmitting means arranged for wirelessly transmitting the condition set for the sub-irrigation outlet arrangement 113 to the further wireless receiving means of the further controller 133. In other words, the mobile UE allows a farmer to control the ground water level of field 103 while residing in a hammock enjoying a cold beer.

Claims (15)

CONCLUSIESCONCLUSIONS 1. Inrichting (1) voor een sub-irrigatiesysteem (101) voor sub-irrigatie van een veld (103), waarbij de inrichting (1) is ingericht voor het ontvangen van water van een watertoevoer (105) en ingericht om te zijn verbonden voor fluidumstroming met een waterleverorgaan (107) voor het via het waterleverorgaan (107) aan het veld (103) leveren van het water beneden een oppervlakteniveau (111) van het veld (103), de inrichting (1) omvattende: - een kleparrangement (3) omvattende een kleporgaan (5), waarbij het kleparrangement (3) is ingericht om in een eerste conditie van het kleporgaan (5) toe te staan dat water via het kleparrangement (3) wordt geleverd aan het waterleverorgaan (107) en ingericht om in een tweede conditie van het kleporgaan (5) levering van het water via het kleparrangement (3) aan het waterleverorgaan (107) te blokkeren; - een detectie-arrangement (7) omvattende een drijforgaan (9), waarbij het detectie-arrangement (7) is ingericht voor het detecteren van een grondwaterniveau (109) onder het oppervlakteniveau (111) van het veld (103) door flotatie van het drijforgaan (9), tijdens gebruik van de inrichting (1), in grondwater, waarbij het drijforgaan (9) zodanig met het kleparrangement (3) is gekoppeld dat het kleporgaan (5) in de eerste conditie of in de tweede conditie is in afhankelijkheid van een positie van het drijforgaan (9); - een aanstuurarrangement (11) dat is ingericht voor het veranderen van een gewicht van ten minste één van het drijforgaan (9) en het kleporgaan (5) wanneer het detectie-arrangement (11) detecteert dat het grondwaterniveau (109) beneden een vooraf bepaald grondwaterniveau is zodat het kleporgaan (5) van de tweede conditie naar de eerste conditie beweegt.An apparatus (1) for a sub-irrigation system (101) for sub-irrigation of a field (103), the apparatus (1) being adapted to receive water from a water supply (105) and arranged to be connected for fluid flow with a water supply member (107) for supplying the water via the water supply member (107) to the field (103) below a surface level (111) of the field (103), the device (1) comprising: - a valve arrangement ( 3) comprising a valve member (5), the valve arrangement (3) being arranged to allow in a first condition of the valve member (5) to supply water via the valve arrangement (3) to the water supply member (107) and arranged to in a second condition of the valve member (5) to block supply of the water through the valve arrangement (3) to the water supply member (107); - a detection arrangement (7) comprising a buoyancy member (9), the detection arrangement (7) being adapted to detect a groundwater level (109) below the surface level (111) of the field (103) by flotation of the flotation member (9), during use of the device (1), in groundwater, the flotation member (9) being coupled to the valve arrangement (3) such that the valve member (5) is in the first condition or in the second condition in dependence of a position of the driver (9); - a control arrangement (11) adapted to change a weight of at least one of the float member (9) and the valve member (5) when the detection arrangement (11) detects that the groundwater level (109) is below a predetermined groundwater level so that the valve member (5) moves from the second condition to the first condition. 2. Inrichting (1) volgens conclusie 1, waarbij het aanstuurarrangement (11) is ingericht voor het reduceren van een gewicht van het kleporgaan (5) wanneer het detectie- arrangement (7) detecteert dat het grondwaterniveau (109) beneden het vooraf bepaalde grondwaterniveau is.The device (1) according to claim 1, wherein the control arrangement (11) is adapted to reduce a weight of the valve member (5) when the detection arrangement (7) detects that the groundwater level (109) is below the predetermined groundwater level. is. 3. Inrichting (1) volgens conclusie 1 of 2, waarbij de inrichting (1) een hefboom (15) omvat die is ingericht om te zwenken om een zwenkas (17), waarbij het kleporgaan (5) op een eerste locatie aan de hefboom (15) is gekoppeld en het drijforgaan (2) op een tweede locatie van de hefboom (15) is gekoppeld, waarbij de eerste locatie en de tweede locatie aan tegenover gelegen zijden van de zwenkas (17) zijn.Device (1) according to claim 1 or 2, wherein the device (1) comprises a lever (15) adapted to pivot about a pivot axis (17), wherein the valve member (5) is at a first location on the lever (15) is coupled and the driver (2) is coupled at a second location of the lever (15), the first location and the second location being on opposite sides of the pivot shaft (17). 4. Inrichting (1) volgens conclusie 3, waarbij het detectie-arrangement (7) een verbindingsarrangement (25) omvat dat het drijforgaan (9) op een nominale afstand (n) met de hefboom verbindt, waarbij het verbindingsarrangement (25) is ingericht voor het toestaan dat een lengte van het verbindingsarrangement (25) varieert binnen een vooraf bepaald bereik ten opzichte van de nominale afstand (n) voor het variëren van een afstand tussen het drijforgaan (9) en de tweede locatie.The device (1) according to claim 3, wherein the detecting arrangement (7) comprises a connecting arrangement (25) connecting the driving member (9) to the lever at a nominal distance (n), the connecting arrangement (25) being arranged for allowing a length of the connecting arrangement (25) to vary within a predetermined range from the nominal distance (n) for varying a distance between the driver (9) and the second location. 5. Inrichting (1) volgens elke willekeurige van de voorgaande conclusies, waarbij het kleporgaan (5) een opneemruimte (19) omvat die is ingericht voor het houden van water en een opneemopening omvat voor het toestaan dat het water de opneemruimte binnengaat, waarbij het aanstuurarrangement (11) een gewichtaanstuurklep (21) omvat die is ingericht om in een eerste conditie van de gewichtaanstuurklep (21) toe te staan dat het water uit de opneemruimte (19) stroomt voor het verlagen van het gewicht van het kleporgaan (5).Apparatus (1) according to any one of the preceding claims, wherein the valve member (5) comprises a receiving space (19) adapted for holding water and comprising a receiving opening for allowing the water to enter the receiving space, the actuating arrangement (11) comprises a weight actuating valve (21) adapted to allow, in a first condition of the weight actuating valve (21) to flow out of the receiving space (19) the water to reduce the weight of the valve member (5). 6. Inrichting (1) volgens conclusie 5, waarbij de inrichting {1) een actuatie- arrangement (23) omvat voor het in de eerste conditie brengen van de gewichtaanstuurklep (21) in afhankelijkheid van de positie van het drijflichaam (9).Device (1) according to claim 5, wherein the device {1) comprises an actuation arrangement (23) for bringing the weight actuating valve (21) into the first condition in dependence on the position of the floating body (9). 7. Inrichting (1) volgens elke willekeurige van de voorgaande conclusies, waarbij het detectie-arrangement (7) een instelarrangement (27) omvat voor het instellen van het vooraf bepaalde grondwaterniveau.An apparatus (1) according to any one of the preceding claims, wherein the detection arrangement (7) comprises an adjustment arrangement (27) for adjusting the predetermined groundwater level. 8. Inrichting (1) volgens conclusie 3 en 7, waarbij het instelarrangement (27) is ingericht voor het instellen van de nominale afstand (n).Device (1) according to claims 3 and 7, wherein the adjusting arrangement (27) is arranged for adjusting the nominal distance (n). 9. Inrichting (1) volgens conclusie 8, waarbij het instelarrangement (27) een actuator omvat, die is ingericht voor het instellen van de nominale afstand (n).Device (1) according to claim 8, wherein the adjustment arrangement (27) comprises an actuator, which is adapted to adjust the nominal distance (n). 10. Inrichting (1) volgens conclusie 9, waarbij de inrichting (1) een aanstuureenheid (29) omvat die is ingericht voor het aansturen van de actuator voor het instellen van de nominale afstand (n).A device (1) according to claim 9, wherein the device (1) comprises a control unit (29) adapted to control the actuator for setting the nominal distance (n). 11. Inrichting (1) volgens conclusie 10, waarbij de aanstuurinrichting (29) draadloze ontvangstmiddelen omvat voor het draadloos ontvangen van het vooraf bepaalde grondwaterniveau, waarbij de aanstuurinrichting (29) verder is ingericht voor het aansturen van de actuator rekening houdend met het ontvangen vooraf bepaalde grondwaterniveau voor het instellen van de nominale afstand {n).Apparatus (1) according to claim 10, wherein the control device (29) comprises wireless reception means for wirelessly receiving the predetermined groundwater level, the control device (29) being further adapted to control the actuator taking into account the reception of the predetermined determined groundwater level for setting the nominal distance {n). 12. Inrichting (1) volgens conclusie 11, waarbij de inrichting (1) verder een mobiel gebruiksapparaat, UE, omvat waarbij het mobiele UE een insteleenheid omvat voor het instellen van het vooraf bepaalde grondwaterniveau, en waarbij de mobiele UE draadloze zendmiddelen omvat die zijn ingericht voor het draadloos verzenden van het vooraf bepaalde grondwaterniveau aan de draadloze ontvangstmiddelen van aanstuurinrichting (29).The apparatus (1) according to claim 11, wherein the apparatus (1) further comprises a mobile user device, UE, wherein the mobile UE comprises a setting unit for setting the predetermined groundwater level, and wherein the mobile UE comprises wireless transmitting means arranged for wirelessly transmitting the predetermined groundwater level to the wireless receiving means of control device (29). 13. Sub-irrigatiesysteem (101) voor een veld (103) omvattende een inrichting (1) volgens elke willekeurige van de voorgaande conclusies, waarbij het sub-irrigatiesysteem (101) verder een watertoevoer (105) omvat die voor fluidumstroming is gekoppeld met de inrichting (1) voor het toevoeren van water aan de inrichting (1) en omvattende een waterleverorgaan (107) voor het leveren van het water via de inrichting (1) aan het veld (103) beneden een oppervlakteniveau (111) van het veld (103), bij voorkeur beneden een grondwaterniveau (109) van het veld (103).A sub-irrigation system (101) for a field (103) comprising an apparatus (1) according to any preceding claim, wherein the sub-irrigation system (101) further comprises a water supply (105) coupled for fluid flow to the device (1) for supplying water to the device (1) and comprising a water supply means (107) for supplying the water via the device (1) to the field (103) below a surface level (111) of the field ( 103), preferably below a groundwater level (109) of the field (103). 14. Sub-irrigatiesysteem (101) volgens conclusie 13, waarbij het sub- irrigatiesysteem (101) verder een sub-irrigatie uitlaat (113) omvat, die is gekoppeld voor fluidumstroming met het waterleverorgaan (107) op een afstand van de inrichting (1), waarbij de sub-irrigatie uitlaat (113) is ingericht om in een eerste conditie van de sub-irrigatie uitlaat (113) toe te staan dat water van het veld (103) draineert via de sub-irrigatie uitlaat (113) en het waterleverorgaan (107) en in een tweede conditie van de sub-irrigatie uitlaat (113) drainage van het veld (103) blokkeert van het water via de sub-irrigatie uitlaat (113) en het waterleverorgaan (107).The sub-irrigation system (101) of claim 13, wherein the sub-irrigation system (101) further comprises a sub-irrigation outlet (113) coupled for fluid flow to the water supply member (107) remote from the device (1). ), wherein the sub-irrigation outlet (113) is arranged to allow in a first condition of the sub-irrigation outlet (113) water to drain from the field (103) through the sub-irrigation outlet (113) and the water supply means (107) and in a second condition the sub-irrigation outlet (113) blocks drainage of the field (103) of the water through the sub-irrigation outlet (113) and the water supply means (107). 15. Veld (103) omvattende een inrichting (1) volgens elke willekeurige van de conclusies 1 tot en met 12 en/of omvattende een sub-irrigatiesysteem (101) volgens conclusie 13 of 14.Field (103) comprising a device (1) according to any one of claims 1 to 12 and/or comprising a sub-irrigation system (101) according to claim 13 or 14.