Irrigation device and method for operating an irrigation system

Abstract

Irrigation device for installation in the ground for supplying plants (2) with water and / or liquid nutrients, comprising: - a pipeline (3) with a shell wall (4) which, for the formation of a liquid channel (4a), has a closed-surface first shell wall section (4.1) and a second shell wall section (4.2) supplementing the first shell wall section (4.1), which has at least one first opening (5), and a liquid-permeable insert (6), characterized in that - the liquid-permeable insert (6) lines at least partially on the inside of the shell wall (4) of the pipeline (3) in the area of ​​the first shell wall section (4.1), wherein the insert has a planar support layer (7) which is provided with second openings (8) and which has several spacers (9) which are designed, in an arrangement of the insert (6) placed in the pipeline (3), to keep the planar support layer (7) at a distance (A) from the inside of the shell wall (4) of the pipeline (3), so that an annular section space (10) is formed between the planar support layer (7) of the insert (6) and the shell wall (4) of the pipeline (3), which forms a storage cavity for liquids.

Description

[0001] The invention relates to an irrigation device for installation in the ground for supplying plants with water and / or liquid nutrients. The invention also relates to an associated method for operating an irrigation system comprising such irrigation devices.

[0002] The patent specification AT 384 146 B describes a pipe for watering plants, in particular for root watering, with a supply pipe having a substantially circular cross-section and provided with through-openings, on the outer surface of which at least one fibrous material layer is arranged at least in the region of its through-openings, and with a cladding pipe, wherein the water-impermeable cladding pipe is preferably made of plastic, is provided with at least one longitudinal slit and completely encloses the supply pipe and the fibrous material layers arranged thereon apart from the longitudinal slit, and wherein the supply pipe has through-openings only in the region of the longitudinal slit of the surrounding cladding pipe.

[0003] US 3,403,519 A describes an irrigation hose system with a perforated pipe in which a separate support structure is inserted, on which a packing is mounted. The packing comprises a hose with radial openings and a fabric that covers the hose in a sheath-like manner.

[0004] The object of the invention is to promote plant growth by means of a particularly suitable irrigation method.

[0005] The object is achieved by an irrigation device for laying in the ground for supplying plants with water and / or liquid nutrients, comprising: - a pipeline with a casing wall, which has a closed-surface first shell wall section to form a liquid-conducting channel and a second shell wall section supplementing the first shell wall section, which second shell wall section has at least one first opening, and a liquid-permeable insert, wherein - the liquid-permeable insert at least partially lines the inside of the casing wall of the pipeline in the region of the first shell wall section from the inside, wherein the insert has a flat support layer which is provided with second openings and which has a plurality of spacers which are designed, in an arrangement of the insert inserted into the pipeline, to hold the flat support layer at a distance from the inside of the casing wall of the pipeline, so that an annular section space is formed between the flat support layer of the insert and the casing wall of the pipeline, which annular section space forms a storage cavity for liquids.

[0006] The irrigation system serves to distribute the liquid required by the plants as evenly as possible over a larger area, or at least in such a way that the plants present in the area have as equal access as possible to the liquid they require. The required liquid is primarily water. If necessary, the water can be enriched with nutrients that the plants need for their growth. The liquid can also be a liquid nutrient solution.

[0007] The irrigation device is designed for installation in the ground. The ground can be, for example, a humus layer, a sand layer, or a gravel layer, particularly in a topsoil layer, or another soil structure.

[0008] The irrigation device can comprise one or more pipelines. Several pipelines can be arranged in series or nested together, and / or arranged parallel to one another or in other orientations. One or more pipelines can be supplied with the liquid, in particular water, via at least one inlet or several inlet lines.

[0009] For example, the pipeline may have a circular cross-section. However, the pipeline does not necessarily have to be exactly circular; rather, the pipeline may also have other cross-sectional shapes, such as an oval shape or even a more rectangular or square basic shape.

[0010] The pipeline has a casing wall which surrounds or laterally delimits a central interior space of the pipeline. The pipeline has two opposite end faces. One of the two faces can be closed and the other face can be open. Alternatively, both faces can be open or both faces can be closed. The respective variant can be selected depending on the intended use and / or the arrangement of several pipelines in relation to one another. Whether an end face is to be regarded as open or closed depends essentially on whether the water or liquid contained in the pipeline can escape at the end face (open), for example into another pipeline connected at the end face, or is retained (closed), i.e. remains in the pipeline.

[0011] The at least one pipeline is intended for installation in the ground in an at least substantially horizontal orientation. However, a substantially horizontal orientation also includes an arrangement of the pipeline at a gradient or incline, so that the pipeline can certainly be installed with a gradient or incline of up to 20%. A certain gradient of the pipeline is particularly useful in order to maintain a conveying effect for the water or liquid nutrient solution present in the pipeline due to the influence of gravity. This can help prevent waterlogging within the pipeline.

[0012] The first shell wall section can therefore preferably be formed by a lower shell part relative to the direction of gravity, in particular the lower shell half of the pipeline. The second shell wall section can therefore preferably be formed by an upper shell part relative to the direction of gravity, in particular the upper shell half of the pipeline.

[0013] The first shell wall section can, in particular, extend over the entire axial length of the pipeline or at least over a substantial portion of the axial length of the pipeline. Similarly, the second shell wall section can, in particular, extend over the entire axial length of the pipeline or at least over a substantial portion of the axial length of the pipeline.

[0014] The second shell wall section can have a single opening. Alternatively, the second shell wall section can have multiple openings. The contour of the opening or the contours of the multiple openings can have a largely arbitrary shape. For example, the openings can be circular or oval. The openings can also be formed by elongated holes, for example.

[0015] The insert forms a liquid-permeable partition wall between the annular section space, i.e. the storage cavity in which the liquid, in particular water or nutrient solution is conducted, and a central interior space of the pipeline, which forms a receiving space for soil material, in particular topsoil. Due to the at least one first opening, the pipeline also enables plant roots to grow into the central interior space of the pipeline, i.e. into the receiving space for soil material. If necessary, for example in the case of plant cultures, the plants can also be planted with their root balls directly into the central interior space of the pipeline. The insert is designed to allow liquid, in particular water or nutrient solution, to pass out of the annular section space, i.e. from the storage cavity, but to retain soil material in the central interior space of the pipeline, such that no soil material can enter the annular section space, i.e.i.e., into the storage cavity. The insert can also be designed to prevent roots from growing into the annular section space, i.e., into the storage cavity. Alternatively, however, the insert can be designed such that roots, possibly only to a small extent, can grow through the insert into the annular section space, i.e., into the storage cavity.

[0016] The insert, in particular the flat support layer of the insert, can accordingly be made from an open-pore material or from a liquid-impermeable material that is provided with second openings, i.e. optionally has a multiplicity of holes or bores or other designed passages, such as slots or grid holes. In a first material variant, the insert, in particular the flat support layer of the insert, can be rigid. In a second material variant, the insert, in particular the flat support layer of the insert, can be flexible. In a flexible design of the insert, the insert can be produced as a flat, in particular flat mat, which is then bent or rolled up so that it can be inserted into the pipeline, wherein the insert adapts to the shape of the casing wall.In the case of a rigid insert, the insert can be manufactured in a form and / or shape that is already adapted to the shape of the shell wall. This allows the rigid insert to be inserted axially into the pipeline from one end face of the pipeline.

[0017] The insert partially or completely lines the inside of the casing wall of the pipeline. The insert can in particular extend over the entire axial length of the pipeline. The insert should extend over at least a circumferential angle of 180 degrees. Preferably, the insert can extend over a circumferential angle of between 180 degrees and 270 degrees. If necessary, the insert can extend over the entire inner surface of the casing wall of the pipeline, i.e. the insert can then extend over a circumferential angle of 360 degrees. The insert can have cutouts which, in the lined installation position of the insert in the pipeline, leave at least one first opening free.

[0018] The flat support layer of the liner determines the permeability or retention properties of the liner, which allows the passage of liquid, particularly water or nutrient solution, from the annular section space, i.e., from the storage cavity, while retaining soil material in the central interior of the pipeline, preventing soil material from entering the annular section space, i.e., the storage cavity. The degree of permeability or retention properties is determined by the size, shape, and number of the second openings.

[0019] To prevent the flat support layer of the insert from resting completely directly on the inside of the pipeline's shell wall, thus making the formation of an annular space impossible, the insert features spacers. The spacers can be formed integrally with the flat support layer of the insert. Alternatively, the spacers can be manufactured separately and bonded to the flat support layer of the insert.

[0020] It would even be conceivable for the spacers not to be formed on the insert at all, but rather to be provided on the pipeline, for example, by projecting from the inside of the shell wall inward toward the center. Such a design is possible in principle, but would be significantly more expensive to manufacture than a one-piece design with the insert or a separate design and attachment to the insert.

[0021] The number of spacers can vary. Thus, in a first spacer variant, only a small number of spacers can be provided, for example only two, three, or four spacers, if the spacers are designed to be sufficiently stable and the flat support layer of the insert is sufficiently dimensionally stable. In a second spacer variant, however, the spacers can also be formed from a large number of flexible or soft bristles or needles, which are distributed as evenly as possible over the surface. The bristles or needles can be part of the flat support layer of the insert. The bristles or needles can, in particular, be formed integrally with the flat support layer of the insert.

[0022] The radial height of the spacers or the length of the bristles or needles determines the radial height of the annular section space or the storage cavity. The number of spacers or bristles or needles also determines the distance between the spacers or bristles or needles and consequently also the permeability within the storage cavity with regard to the flow of the liquid or water. Therefore, there should not be too many spacers or bristles or needles, which would unduly impede flow. In other words, the spacers or bristles or needles should not be arranged too closely together, so that there can always be sufficient flow of the liquid, especially the water or nutrient solution, through the storage cavity.

[0023] Preferably, the at least one first opening may have a larger opening size which allows soil material to be poured into a central interior space of the pipeline, and the second openings may each have smaller opening sizes which allow liquid to pass from the storage cavity of the annular section space into the interior space of the pipeline, but retain the soil material present in the interior space of the pipeline from entering the hollow annular section space.

[0024] In a first variant, the pipeline can, for example, have a single first opening. This single first opening can, in particular, be arranged in an upper casing wall half of the pipeline and extend, in particular, in the axial direction in the manner of an elongated hole. Alternatively, in a second variant, the casing wall of the pipeline can have two, three, or more first openings, depending on the axial length of the pipeline. These multiple first openings can be arranged serially along the axial extent of the pipeline, in particular at equal distances from each other between two first openings. The multiple first openings can have circular, oval, rectangular, or square contours, or can be designed as elongated holes with, for example, two long edges running parallel and at a distance from one another and two opposite, end-face, semicircular, short edges.

[0025] The first openings can be sized sufficiently to allow topsoil, possibly stones, gravel, sand, as well as soil animals and organisms to penetrate into the central interior of the pipeline, radially from outside the pipeline. Such sufficiently large first openings also allow plant roots to grow into the central interior of the pipeline.

[0026] The second openings can be sized so small that topsoil, possibly stones, gravel, sand, and soil animals are prevented from penetrating the annular section space, i.e., the storage cavity. However, the second openings must be sized at least large enough to allow the fluid, in particular water or nutrient solution, to escape from the annular section space, i.e., into the storage cavity, and penetrate into the central interior of the pipeline.

[0027] The spacers can be designed to hold the flat support layer of the insert at a distance from the inside of the casing wall of the pipeline which is at least 1 / 5 and at most 2 / 5 of the inside diameter of the pipeline.

[0028] For example, if the pipeline is designed as a sewer pipe (KG pipe) with a nominal diameter of 110 and an inner diameter of 104 mm (wall thickness 3.0 mm), the distance between the flat support layer of the insert and the inside of the pipe shell wall is between 20.8 mm and 41.6 mm. For example, if the pipeline is designed as a sewer pipe with a nominal diameter of 125 and an inner diameter of 118 mm (wall thickness 3.5 mm), the distance between the flat support layer of the insert and the inside of the pipe shell wall is between 23.6 mm and 47.2 mm. For example, if the pipeline is designed as a sewer pipe with a nominal diameter of 160 and an inner diameter of 152 mm (wall thickness 4.0 mm), the distance between the flat support layer of the insert and the inside of the pipe shell wall is between 30.4 mm and 60.8 mm.And, for example, in the case of a pipeline being designed as a sewer pipe with a nominal diameter of 200 and an inner diameter of 190 mm (wall thickness 5.0 mm), the distance between the flat supporting layer of the insert and the inside of the casing wall of the pipeline is between 38.0 mm and 76.0 mm.

[0029] The annular section space can extend over a circumferential sector between 180 degrees and 300 degrees in the cross-section of the pipeline.

[0030] The annular section space can, in particular, extend over the entire axial length of the pipeline. The annular section space should extend over at least a circumferential angle of 180 degrees. Preferably, the annular section space can extend over a circumferential angle between 180 degrees and 270 degrees. Optionally, the annular section space can extend over the entire inner surface of the casing wall of the pipeline, i.e., the annular section space can then extend over a circumferential angle of up to 300 degrees.

[0031] The annular section space can extend in the cross-section of the pipeline over a circumferential sector which at least approximately or completely coincides with the extension of the insert over the inner circumference.

[0032] The casing wall of the pipeline may have a plurality of first openings, each of which is arranged at a distance from one another along the axial extent of the pipeline.

[0033] The casing wall of the pipeline can accordingly have two, three, or more first openings, depending on the axial length of the pipeline. These multiple first openings can be arranged serially along the axial extent of the pipeline, in particular at equal intervals between two first openings. The multiple first openings can have circular, oval, rectangular, or square contours, or can be designed as elongated holes with, for example, two long, parallel, spaced-apart edges and two opposite, semicircular, short, front-facing edges.

[0034] The pipeline may have at least one open end face configured to allow fluid located in the storage cavity to flow out.

[0035] The open end of the pipeline should be located at a lower end in a sloping installation position of the pipeline. This allows the liquid, in particular the water or the nutrient solution to flow out of the pipeline automatically under the influence of gravity. This can help to avoid unwanted waterlogging. Because the liquid is conveyed by gravity, special conveying pumps are not required. The at least one open end of the pipeline can be designed to prevent topsoil, possibly stones, gravel, sand, as well as soil animals and organisms from penetrating the front of the pipeline. For this purpose, the at least one open end can be covered, for example, by a perforated plate, a grid or a net which is permeable to the liquid, in particular the water or the nutrient solution.

[0036] The insert can be made of a flexible drainage mat, a fleece or artificial turf.

[0037] The insert can be specially constructed and designed for use in an irrigation device according to the invention. Accordingly, the insert can have the flat support section and the spacers, as described. As an alternative to separate production, however, inserts can also be used which already exist and are available as such for purposes other than the purpose according to the invention. For example, the insert can be formed from an artificial turf mat. Artificial turf mats which have a less dense structure, i.e. which have rather coarse blade sections which are also rather thinly distributed, i.e. which form large gaps, are particularly suitable for this purpose. In a further alternative embodiment, nonwovens can optionally be used.With nonwovens, the insert is not divided into a separate base layer and separate spacers. Instead, the base layer also forms the spacers, as the nonwoven has open-pore hollow chambers, whereby the material structure of the nonwoven simultaneously serves as the spacer structure. Furthermore, the material structure of the nonwoven also forms the base layer.

[0038] The pipeline can be a plastic pipe, in particular a sewer pipe or a high-temperature pipe.

[0039] Each pipeline can have a pipe section of a specific length, for example, 1 meter, 2 meters, or 3 meters, and be provided with at least one sleeve, so that several pipe sections can be inserted into one another in a fluid-tight manner to form a pipeline of any desired length. Several pipe sections or several pipelines can form a larger network structure in the ground, for example in the form of several pipes arranged parallel to one another at a distance from one another, in the form of pipes extending outwards in a star shape from a common connection point, or in the form of pipes that form curves or ring structures.

[0040] The object is also achieved by a method for operating an irrigation system which has at least one irrigation device according to one of the described embodiments and / or variants, wherein the irrigation device is flowed through in a circulating operation with a liquid, in particular water or a nutrient liquid.

[0041] To maintain circulation, the irrigation system may comprise at least one drivable pump which provides a forced flow of liquid in the pipes of the irrigation device.

[0042] In a further development of the method, it can be provided that the irrigation device or the plurality of irrigation devices, as according to one of the described embodiments and / or variants, are flowed through in a continuous flow operation with a liquid, in particular water or a nutrient liquid.

[0043] Here too, in order to maintain a liquid flow, the irrigation system can have at least one drivable pump which provides a forced liquid flow in the pipes of the irrigation device. In the case of once-through operation, the liquid, in particular the water or the nutrient solution, is supplied at one end or generally at an end section of the pipe, runs through at least one string of pipes and is discharged from the string of pipes at an opposite end section, in particular at its front side. The leaked liquid, the water or the nutrient solution can, if necessary, seep into the ground after exiting. However, it is generally more advantageous if the water or the nutrient solution is reused, for example within the framework of the above-mentioned circulation operation, in which the water or the nutrient solution is fed from the end of the pipes back to the beginning or end.is returned to an inlet area of ​​the pipeline.

[0044] Specific embodiments of the invention are explained in more detail in the following description with reference to the accompanying figures. Regardless of the specific context in which they are mentioned, specific features of these exemplary embodiments may represent general features of the invention, even when considered individually or in further combinations.

[0045] They show: Fig. 1 a perspective view of a sectioned section of an irrigation device according to the invention, Fig. 2 a perspective view of the irrigation device according to Fig. 1 in a first embodiment over a longer section of the pipeline, Fig. 3 a perspective view of a second embodiment of an irrigation device according to the invention with a single, long first opening, Fig. 4 a perspective view of a third embodiment of an irrigation device according to the invention with several short first openings, Fig. 5 shows an exemplary embodiment of an irrigation system with several irrigation devices aligned parallel to one another, which are connected to a common supply network, Fig. 6 an exemplary embodiment of an irrigation system with several irrigation devices that are coupled together in series, Fig. 7 is a schematic sectional view through a soil in which an irrigation device according to the invention is buried, and Fig. 8 a schematic representation of a possible arrangement of plants relative to the irrigation devices, omitting the actual soil in the representation.

[0046] In the Fig. 1 is an irrigation device 1 for laying in the ground for supplying plants 2 ( Fig. 7, Fig. 8) with water and / or with liquid nutrients.

[0047] The irrigation device 1 comprises a pipeline 3 with a casing wall 4, which has a closed-surface first shell wall section 4.1 to form a liquid conducting channel 4a.

[0048] As particularly in Fig. 2 to Fig. As shown in Figure 6, the pipeline 3 has a second shell wall section 4.2 that complements the first shell wall section 4.1. The second shell wall section 4.2 has at least one first opening 5.

[0049] A liquid-permeable insert 6 is arranged within the pipeline 3, which at least partially lines the inside of the casing wall 4 of the pipeline 3 in the region of the first shell wall section 4.1, as is particularly shown in Fig. 1 is clearly shown.

[0050] The insert 6 has a flat support layer 7 which is provided with second openings 8 and which has a plurality of spacers 9 which are designed, in an arrangement of the insert 6 inserted into the pipeline 3, to space the flat support layer 7 at a distance A ( Fig. 1) from the inside of the jacket wall 4 of the pipeline 3, so that an annular section space 10 is formed between the flat support layer 7 of the insert 6 and the jacket wall 4 of the pipeline 3, which forms a storage cavity for liquids.

[0051] The at least one first opening 5 has a larger opening size which allows soil material to be poured into a central interior of the pipeline 3, and the second openings 8 each have smaller opening sizes which allow liquid to pass from the storage cavity of the annular section space 10 into the interior of the pipeline 3, but retain the soil material present in the interior of the pipeline 3 from entering the hollow annular section space 10.

[0052] The spacers 9 are designed to hold the flat support layer 7 of the insert 6 at a distance A from the inside of the casing wall 4 of the pipeline 3, which is at least 1 / 5 and at most 2 / 5 of the inside diameter of the pipeline 3.

[0053] For example, as shown in the figures, the insert 6 can be formed from an artificial turf mat. Artificial turf mats with a less dense structure, ie, with rather coarse stalk sections that are also rather thinly distributed, ie, forming large gaps, are particularly suitable.

[0054] For example, if the pipeline 3 is designed as a sewer base pipe (KG pipe) with a nominal diameter of 110 and an inner diameter of 104 mm (wall thickness 3.0 mm), the distance A between the flat support layer 7 of the insert 6 and the inside of the casing wall 4 of the pipeline 3 is between 20.8 mm and 41.6 mm. For example, if the pipeline 3 is designed as a sewer base pipe with a nominal diameter of 125 and an inner diameter of 118 mm (wall thickness 3.5 mm), the distance A between the flat support layer 7 of the insert 6 and the inside of the casing wall 4 of the pipeline 3 is between 23.6 mm and 47.2 mm. For example, in the case of a design of the pipeline 3 as a sewer base pipe of nominal diameter 160 and an inner diameter of 152 mm (wall thickness 4.0 mm), the distance A of the flat support layer 7 of the insert 6 from the inside of the shell wall 4 of the pipeline 3 is between 30.4 mm and 60.8 mm.And, for example, in the case of a design of the pipeline 3 as a sewer base pipe of nominal diameter 200 and an inner diameter of 190 mm (wall thickness 5.0 mm), the distance A of the flat support layer 7 of the insert 6 from the inside of the shell wall 4 of the pipeline 3 is between 38.0 mm and 76.0 mm.

[0055] The annular section space 10 can extend in the cross section of the pipeline 3 over a circumferential sector between 180 degrees and 300 degrees, as shown, for example, by approximately 270 degrees.

[0056] In the statements according to Fig. 2, Fig. 4 to Fig. 6 and Fig. 8, the jacket wall 4 of the pipeline 3 has a plurality of first openings 5, which are each arranged at a distance from one another along the axial extent of the pipeline 3.

[0057] The pipes 3 have at least one open end face 11 which is designed to allow the outflow of liquid located in the storage cavity.

[0058] The insert 6 can be formed by a flexible drainage mat, a fleece or artificial turf.

[0059] The pipeline 3 may be a plastic pipe, in particular a sewer pipe or a high-temperature pipe. Each pipeline 3 may have a pipe section of a specific length, for example 1 meter, 2 meters, or 3 meters, and may be connected to at least one sleeve 12 ( Fig. 6, Fig. 8) so that several pipe sections can be inserted into one another in a liquid-tight manner to form a pipeline 3 of any desired length. Several pipe sections or several pipelines 3 can form a larger network structure in the ground, for example in the form of several pipelines 3 arranged parallel to one another at a distance from one another, as is the case, for example, in Fig. 5 is shown.

[0060] To operate a more complex irrigation system, the irrigation device 1 or multiple irrigation devices 1 can be flowed through in a circulating mode with a liquid, in particular water or a nutrient liquid. Alternatively, the irrigation device 1 or multiple irrigation devices 1 can be flowed through in a continuous mode with a liquid, in particular water or a nutrient liquid. For this purpose, multiple irrigation devices 1 can be fluidly connected via connecting lines 13.

Claims

[1] Irrigation device for laying in the ground for supplying plants (2) with water and / or liquid nutrients, comprising: - a pipeline (3) with a jacket wall (4) which has a closed-surface first shell wall section (4.1) to form a liquid conducting channel (4a) and a second shell wall section (4.2) which supplements the first shell wall section (4.1) and has at least one first opening (5), and a liquid-permeable insert (6), characterized by , that - the liquid-permeable insert (6) at least partially lines the inside of the casing wall (4) of the pipeline (3) in the region of the first shell wall section (4.1) from the inside, wherein the insert has a flat support layer (7) which is provided with second openings (8) and which has a plurality of spacers (9) which are designed, when the insert (6) is inserted into the pipeline (3), to hold the flat support layer (7) at a distance (A) from the inside of the casing wall (4) of the pipeline (3), so that an annular section space (10) is formed between the flat support layer (7) of the insert (6) and the casing wall (4) of the pipeline (3), which annular section space (10) forms a storage cavity for liquids. [2] Irrigation device according to claim 1, characterized bythat the at least one first opening (5) has a larger opening size which allows soil material to be poured into a central interior of the pipeline (3) and the second openings (8) each have smaller opening sizes which allow liquid to pass from the storage cavity of the annular section space (10) into the interior of the pipeline (3), but hold back the soil material present in the interior of the pipeline (3) from entering the hollow annular section space (10). [3] Irrigation device according to claim 1 or 2, characterized by that the spacers (9) are designed to hold the flat support layer (7) of the insert (6) at a distance (A) from the inside of the casing wall (4) of the pipeline (3) which is at least 1 / 5 and at most 2 / 5 of the inside diameter of the pipeline (3). [4] Irrigation device according to one of claims 1 to 3, characterized bythat the annular section space (10) extends in the cross-section of the pipeline (3) over a circumferential sector between 180 degrees and 300 degrees. [5] Irrigation device according to one of claims 1 to 4, characterized by that the jacket wall (4) of the pipeline (3) has a plurality of first openings (5) which are each arranged at a distance from one another along the axial extent of the pipeline (3). [6] Irrigation device according to one of claims 1 to 5, characterized by that the pipeline (3) has at least one open end face (11) which is designed to allow liquid located in the storage cavity to flow out. [7] Irrigation device according to one of claims 1 to 6, characterized by that the insert (6) is formed by a flexible drainage mat, a fleece or an artificial turf. [8] Irrigation device according to one of claims 1 to 7, characterized bythat the pipeline (3) is a plastic pipe, in particular a sewer pipe or a high-temperature pipe. [9] Method for operating an irrigation system comprising at least one irrigation device (1) according to one of claims 1 to 8, characterized by that the irrigation device (1) is flowed through in a circulating operation with a liquid, in particular water or a nutrient liquid. [10] Method for operating an irrigation system comprising at least one irrigation device (1) according to one of claims 1 to 8, characterized by that the irrigation device (1) is flowed through in a continuous flow operation with a liquid, in particular water or a nutrient liquid.

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