JP2022175301A - Irrigation tube - Google Patents

Abstract

To provide an irrigation tube which enables irrigation to be efficiently performed within a short time, suppression of the occurrence of a plant disease, and irrigation to be surely performed even for multiple types of trays having pods of different equidistances.SOLUTION: An irrigation tube 1 is configured such that the following expressions (1) and (2) are established, in which A denotes intervals among multiple irrigation holes 3, R denotes a radius of the irrigation tube 1, B denotes radiuses of multiple pods 10 along the irrigation holes 3 in the longitudinal direction of the irrigation tube 1, D denotes intervals among the pods 10 in the short direction W of the irrigation tube 1, and θ denotes an angle formed between a vertical direction H and each of the irrigation holes 3 with respect to the center P of the outer periphery of the irrigation tube 1, in the arc of the cross section in the short direction W of the irrigation tube 1. D/2<Rsin θ (where 0<θ≤π/2) (1) 2A<B (2)SELECTED DRAWING: Figure 1

Description

The present invention relates to an irrigation tube.

BACKGROUND ART Conventionally, when cultivating plants such as vegetables, fruits, and flowers, overhead watering methods and drip watering methods are known as methods of watering the plants.

The overhead watering method is a method in which water is supplied to plants planted in pods arranged in trays by arranging a watering port above the plants and spraying water from the watering port in the form of a shower (for example, , see Patent Document 1).

In addition, the drip watering method is a method in which drip tubes are placed along the ground and water is dripped onto the soil from the drip tubes by irrigating the plants drop by drop at a slow rate so as not to over water the plants. (See Patent Document 2, for example).

JP 2006-288392 A JP-A-2010-88360

Here, in the conventional overhead irrigation method, since water is sprinkled in a shower-like manner from a sprinkling port located above, water splashes during irrigation and adheres to the leaves and stems of plants, damaging the surface and causing disease. There was a problem that the occurrence of

Further, in the drip watering method, since water is watered drop by drop at a slow speed, watering takes a long time, and there is a problem that it is difficult to water efficiently in a short time.

Moreover, when the conventional irrigation tube is used in a tray having pods arranged at equal intervals, there is a problem that the irrigation efficiency is lowered because the plants planted in the pods have holes that cannot be irrigated. rice field.

Therefore, the present invention has been made in view of this point, and is capable of efficiently watering in a short time, suppressing the occurrence of plant diseases, and providing a plurality of types of plants having different equally spaced pods. To provide an irrigation tube capable of reliably irrigating even a tray.

In order to achieve the above object, the irrigation tube of the present invention has a plurality of irrigation holes provided at regular intervals in the longitudinal direction, and a tray having a plurality of rows of pods each having a plurality of pods in which plants are planted. An irrigation tube to be placed, wherein A is the interval between the plurality of irrigation holes, R is the radius of the irrigation tube, B is the diameter of the pod along the plurality of irrigation holes in the longitudinal direction of the irrigation tube, and is used for irrigation. D is the gap between the plurality of pods in the transverse direction of the tube, and θ is the angle formed by the vertical direction and the irrigation hole with respect to the center of the outer circumference of the irrigation tube in the arc of the cross section in the transverse direction of the irrigation tube. , the relationship of the following equations (1) and (2) is established.

[Number 1]
D/2<R sin θ (where 0<θ≦π/2) (1)
[Number 2]
2A<B (2)

ADVANTAGE OF THE INVENTION According to this invention, while being able to water efficiently for a short time, the occurrence of plant diseases can be suppressed. Moreover, it is possible to reliably water a plurality of types of trays having pods at different equal intervals.

1 is a cross-sectional view of an irrigation tube according to an embodiment of the present invention; FIG. 1 is a top view of an irrigation tube according to an embodiment of the present invention; FIG. FIG. 10 is a top view showing an example of a tray in which pods are arranged in which an irrigation tube is used according to an embodiment of the present invention; FIG. 10 is a top view showing another example of a tray in which pods are arranged using the irrigation tube according to the embodiment of the present invention; FIG. 4 is a top view of the tray shown in FIG. 3 when the irrigation tube according to the embodiment of the present invention is used; FIG. 5 is a top view of the tray shown in FIG. 4 when the irrigation tube according to the embodiment of the present invention is used;

Hereinafter, the irrigation tube of the present invention will be described in detail based on the drawings. In addition, the present invention is not limited to the following embodiments, and can be appropriately modified and applied without changing the gist of the present invention.

FIG. 1 is a cross-sectional view of an irrigation tube according to an embodiment of the present invention, and FIG. 2 is a top view of the irrigation tube according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, an irrigation tube 1 of the present invention includes a water pipe 2 and irrigation holes 3 provided at regular intervals A in the water pipe 2 . This irrigation tube 1 is rolled up in a state of being crushed into a tape shape, and becomes tubular when water is fed.

The water pipe 2 is a water pipe formed by extrusion molding or the like into a tubular shape having a hollow portion and extending in one direction. The water pipe 2 is made of, for example, a thermoplastic resin or the like. . Examples of such thermoplastic resins include polypropylene, polyvinyl chloride, branched low-density polyethylene, linear low-density polyethylene, and the like. The thermoplastic resin may contain pigments, dyes, plasticizers, stabilizers, antioxidants, fillers, etc., if necessary.

Further, a water supply portion 4, which is a hollow portion of the water supply pipe 2, serves as a flow path for water. The water pipe 2 is installed on the pod 10 with the lower half 2a directed toward the ground (the side of the pod 10 provided on the tray) and the upper half 2b directed upward.

The width L of the water pipe 2 (that is, the irrigation tube 1) when water is not being fed to the water feeding unit 4 is preferably 30 mm or more and 50 mm or less. If the width L of the water pipe 2 is 30 mm or more, a sufficient amount of water can be supplied, and if it is 50 mm or less, the irrigation tube 1 can be easily installed on the ground.

Further, as shown in FIGS. 1 and 2, in the longitudinal direction X of the irrigation tube 1 (water pipe 2), a plurality of (Fig. 2, 7) irrigation holes 3 are provided in a straight line.

The interval A between the irrigation holes 3 is preferably 20 mm or more and 30 mm or less. If the interval A between the irrigation holes 3 is 20 mm or more, water can be irrigated while the water pressure of the irrigation tube 1 is maintained.

Moreover, the hole diameter of the watering hole 3 is preferably 0.2 mm or more and 0.5 mm or less. If the diameter of the irrigation hole 3 is 0.2 mm or more, the amount of irrigation water is easily increased. be able to.

Next, a method for using the irrigation tube 1 of the present invention will be described.

FIG. 3 is a top view showing an example of a tray in which pods are arranged using an irrigation tube according to an embodiment of the present invention, and FIG. FIG. 10 is a top view showing another example of a tray on which pods are arranged; 5 is a top view of the tray shown in FIG. 3 in which the irrigation tube according to the embodiment of the present invention is used, and FIG. 6 is a top view of the tray shown in FIG. Fig. 10 is a top view of the case of using the tube.

As shown in FIG. 3, the tray 20 has a plurality of pod rows (two rows in FIG. 3) made up of a plurality of (four in FIG. 3) pods 10 in which plants are planted along the longitudinal direction Y. columns) are arranged. In addition, the plurality of pods 10 are arranged at equal intervals in the longitudinal direction Y of the tray 20 .

As shown in FIG. 4, the tray 30 has a plurality of pod rows (three in FIG. 4) made up of a plurality of (three in FIG. 4) pods 10 in which plants are planted along the longitudinal direction Z. are arranged in two columns). In addition, the plurality of pods 10 are arranged at equal intervals in the longitudinal direction Z of the tray 30 .

1 and 5, the irrigation tube 1 is placed in the gap 21 between the pods 10 in the lateral direction (that is, the direction orthogonal to the longitudinal direction Y) F of the tray 20, and the irrigation hole The lower half portion 2a of the water pipe 2 provided with 3 is placed on the pod 10 side. Similarly, as shown in FIGS. 1 and 6, the irrigation tube 1 is placed in the gap 31 between the pods 10 in the lateral direction (that is, the direction orthogonal to the longitudinal direction Z) G of the tray 30. , the lower half portion 2a of the water pipe 2 provided with the irrigation hole 3 is arranged on the pod 10 side.

When water is supplied from one end of the irrigation tube 1 in the longitudinal direction X, the irrigation tube 1 spouts water from the irrigation holes 3 to irrigate the plants planted in the plurality of pods 10 . is configured to be performed.

Here, when the conventional watering tube is used in a tray having pods arranged at equal intervals, as described above, holes are formed in the pods that cannot be watered, resulting in a decrease in watering efficiency. There was a problem of

Focusing on this point, the inventors of the present invention determined the positions of the plurality of watering holes 3 provided at equal intervals A in the watering tube 1, thereby allowing the plants planted in the plurality of pods 10 to We have found the conditions under which it is possible to reliably irrigate the

More specifically, as shown in FIG. 1, R is the radius of the irrigation tube 1, D is the gap between the plurality of pods 10 in the transverse direction W of the irrigation tube 1, and D is the transverse direction of the irrigation tube 1. In the arc of the cross section at W, when the angle (central angle) formed by the vertical direction H and the irrigation hole 3 with respect to the center P of the outer circumference of the irrigation tube 1 is θ, the relationship of the following formula (3) is characterized in that

[Number 3]
D/2<R sin θ (where 0<θ≦π/2) (3)

With such a configuration, the water for irrigation is jetted from the irrigation hole 3 at an appropriate angle so as not to exceed the edge of the pod 10, so that the water for irrigation is prevented from exceeding the edge of the pod 10. be able to. Therefore, it is possible to surely water the plants planted in the plurality of pods 10, so that water can be efficiently watered in a short time.

In addition, compared to the above conventional overhead watering method, it is possible to suppress water splashing during watering, so the amount of water adhering to the leaves of plants is reduced, making it possible to suppress the occurrence of diseases. become.

Further, in the irrigating tube 1 of the present invention, as shown in FIGS. When the diameter of the pod 10 along the plurality of irrigation holes 3 in the longitudinal direction X of the tube 1 (that is, along the straight line on which the plurality of irrigation holes 3 are provided) is B, the relationship of the following formula (4) is characterized in that

[Number 4]
2A<B (4)

With such a configuration, as shown in FIGS. 5 and 6, it is possible to reliably irrigate all of the plurality of pods 10 in each tray 20, 30, and to arrange different pods 10 at equal intervals. It is possible to reliably water the plurality of types of trays 20 and 30 that are provided.

More specifically, as shown in FIGS. 5 and 6, along the plurality of irrigation holes 3 in the longitudinal direction X of the irrigation tube 1 with the irrigation tube 1 placed on the tray 30 (that is, the plurality of 5 and the tray 30 shown in FIG. By using the watering tube 1 of the present invention that satisfies the relationship of 4), water can be reliably watered even for a plurality of types of trays 20 and 30 having pods 10 with different equal intervals C. .

Next, a method for manufacturing the irrigation tube 1 will be described. The manufacturing process of the irrigation tube 1 includes a water pipe production process, a recess formation process, and an irrigation hole formation process.

When manufacturing the irrigation tube 1, first, the water pipe 2 is produced by extruding a thermoplastic resin material using an extruder, and the water pipe 2 is folded to form a tape-like tube. More specifically, a thermoplastic resin material is melted and extruded from an annular die to fabricate the water pipe 2. The water pipe 2 is sandwiched between pinch rolls and folded to obtain a tape-like tube.

Next, a circular concave portion is formed by intermittently irradiating a laser beam from the outer surface of the water pipe 2 a plurality of times or by intermittently irradiating the laser beam at a different position.

Next, a laser beam is irradiated toward the center of the recess to form the water supply hole 3 . At this time, a plurality of irrigation holes 3 are formed by irradiating the water pipe 2 with a laser beam from a laser beam generator at predetermined equal intervals A and perforating the irrigation pipe 1 shown in FIGS. is manufactured.

The present invention will be described below based on examples. The present invention is not limited to these examples, and these examples can be modified and changed based on the spirit of the present invention, and they are excluded from the scope of the present invention. is not.

(Examples 1 to 4 and Comparative Examples 1 to 6)
(Installation of irrigation tube)
First, a first tray is prepared in which two rows of pods consisting of six pods having the diameter shown in Table 1 are arranged and the pods are arranged with the gap D [mm] between the pods shown in Table 1. did.

Next, 14 irrigation holes were provided at equal intervals in the longitudinal direction in the gaps between the pods in the lateral direction of the first tray. mm] was placed. Since twice the width L of the irrigation tube and the circumference of the irrigation tube (=2πR) are the same, the radius R was obtained from the value of the width L.

In addition, when the pod diameter B along the plurality of irrigation holes in the longitudinal direction of the irrigation tube and the interval C between the pods along the plurality of irrigation holes in the longitudinal direction of the irrigation tube were measured, the values shown in Table 1 were obtained. Met.

Next, water is fed to the irrigation tube from one end in the longitudinal direction of the irrigation tube at a water pressure of 0.005 MPa, and the angle of the irrigation hole provided in the water supply pipe becomes the central angle θ [°] shown in Table 1. Each plant planted in a plurality of pods was watered by arranging the irrigation holes as follows.

(Irrigation leak evaluation)
If the irrigation water did not go over the edge of the pod (no water leakage) when the above watering was performed, 〇 means that the irrigation water exceeded the edge of the pod (water leakage occurred). ) was marked as x. Table 1 shows the above results.

As shown in Table 1, in the irrigation tubes of Examples 1 to 4 and Comparative Examples 1 to 3 in which the relationship of the above formula (3) holds, water is jetted from the irrigation hole at an appropriate angle. It is possible to prevent water from flowing over the edges of pods, and to reliably water plants planted in a plurality of pods, so that water can be efficiently watered in a short period of time. I understand.

(perfusion evaluation for multiple pods)
Next, in Examples 1 to 4 and Comparative Examples 1 to 3, which passed the above-mentioned water leakage evaluation, when all the pods could be watered when the above-mentioned watering was performed, ◯ means that the pods could not be watered. The case where there was was set to x. Table 1 shows the above results.

As shown in Table 1, in Examples 1 to 4 in which the relationship of the above formula (4) holds, water can be reliably watered to all of the plurality of pods in the first tray.

(Examples 5-6)
A second tray was prepared in which two rows of pods consisting of seven pods having the diameter shown in Table 2 were arranged and the pods were arranged with the gap D [mm] between the pods shown in Table 2.

Next, 15 irrigation holes were provided at equal intervals in the longitudinal direction in the gaps between the pods in the lateral direction of the second tray. ] was placed. The irrigating tube of Example 5 is the same as the irrigating tube of Example 3, and the irrigating tube of Example 6 is the same as the irrigating tube of Example 4. Also, since twice the width L of the irrigation tube and the circumference of the irrigation tube (=2πR) are the same, the radius R was obtained from the value of the width L.

In addition, when the pod diameter B along the plurality of irrigation holes in the longitudinal direction of the irrigation tube and the interval C between the pods along the plurality of irrigation holes in the longitudinal direction of the irrigation tube were measured, the values shown in Table 2 were obtained. Met.

Next, water is fed from one end in the longitudinal direction of the water pipe 2 to the irrigation tube at a water pressure of 0.005 MPa, and the angle of the irrigation hole provided in the water pipe becomes the central angle θ [°] shown in Table 2. Each plant planted in a plurality of pods was watered by arranging the irrigation holes as follows.

Then, in the same manner as in Examples 1 to 4 described above, water leak evaluation and water irrigation evaluation for a plurality of pods were performed. Table 2 shows the above results.

As shown in Table 2, in the irrigation tubes of Examples 5 and 6 in which the relationship of the above formula (3) is established, water is ejected from the irrigation holes at an appropriate angle in the same manner as in Examples 1 to 4. , the water for irrigation can be prevented from exceeding the edge of the pod, and the plants planted in a plurality of pods can be reliably irrigated, so that the water can be irrigated efficiently in a short time. I know it can be done.

Further, as shown in Table 2, in Examples 5 and 6 in which the relationship of the above formula (4) holds, in the same way as in Examples 1 and 4 above, all of the plurality of pods in the second tray have It can be seen that irrigation can be reliably carried out.

Further, from the results of Examples 3 and 5 and Examples 4 and 6, which use the same irrigation tube, the relationship of the above formulas (3) and (4) is established, so that pods with different intervals C can be used. It can be seen that the same watering tube can reliably water the plurality of types of trays (that is, the first and second trays).

As explained above, the present invention is particularly useful for irrigation tubes.

1 Irrigation Tube 2 Water Pipe 3 Irrigation Hole 4 Water Conveying Portion 10 Pod 20 Tray 30 Tray

Claims (2)

An irrigation tube having a plurality of irrigation holes provided at equal intervals in the longitudinal direction and placed on a tray in which a plurality of pod rows composed of a plurality of pods in which plants are planted are arranged,
A is the interval between the plurality of irrigation holes, R is the radius of the irrigation tube, B is the diameter of the pod along the plurality of irrigation holes in the longitudinal direction of the irrigation tube, and B is the width direction of the irrigation tube. D is the gap between the plurality of pods in the irrigation tube, and θ is the angle formed between the irrigation hole and the vertical direction with respect to the center of the outer circumference of the irrigation tube in the arc of the cross section in the transverse direction of the irrigation tube. An irrigation tube characterized in that the relationships of the following formulas (1) and (2) are established when
[Number 1]
D/2<R sin θ (where 0<θ≦π/2) (1)
[Number 2]
2A<B (2) 2. The tray includes a plurality of types of trays having different intervals between the plurality of pods along the plurality of irrigation holes in the longitudinal direction of the irrigation tube placed on the tray. The irrigation tube described in .

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