JP3168146B2 - Drip irrigation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drip irrigation device which is laid along a furrow of an agricultural land and applies only a minimum amount of water necessary for crops. And a drip irrigation device capable of supplying irrigation to the terminal even on an uneven farm.

[0002]

2. Description of the Related Art In recent years, the population of the whole world has been rapidly increasing, while the yield of agricultural products per unit has reached a plateau, and it is expected that the food problem will become a major problem in the future. In order to increase the yield of agricultural products, it is necessary to expand the arable land, but the conditions of the land to be developed in the future are considered to be severe for agriculture. For example, agriculture by deforestation in heavy rain areas is not preferable because the function of reducing air purification, particularly the function of lowering the concentration of carbon dioxide, is impaired.

[0003] Therefore, it is necessary to seek future settlements in barren lands in low rainfall areas. Farming in low-lying areas requires irrigation. In general, irrigation employs a method in which water is irrigated from a reservoir to an agricultural land through a canal, a gutter, or the like.

However, such a method consumes a large amount of water, and it is difficult to secure water in a low rainfall area. Also, in desertified barren land, the salt content in the soil is high, so if a large amount of water is irrigated, the water that has penetrated into the soil will dissolve the salt, and the salt-dissolved water will dry the ground surface. It rises to the ground surface due to capillary action and evaporates. As a result, the salt is concentrated on the ground surface and causes salt damage, so that farming becomes impossible.

[0005] In order to prevent this, a water supply pipe (irrigation tube) with an irrigation port (small hole) is laid along the furrow of the agricultural land, and the minimum necessary for crops is passed through the small hole of the water supply pipe. A drip irrigation means that applies only limited water is employed. This means is an excellent watering means that uses less water and has no problem of raising the salt content in the soil.

Further, the drip irrigation means using a water supply tube with a small hole can pump irrigation water by a pump, and therefore has an advantage that irrigation water can be supplied even on an uneven farm with large undulations.

[0007]

However, the conventional drip irrigation means applies pressure to irrigation, and leaks a very small amount of irrigation from a high-pressure irrigation tube (irrigation tool) to supply water to the crop. Therefore, the diameter of the drip irrigation hole needs to be extremely small.

[0008] For this reason, when using water containing suspended matter such as mud, sand, dust, etc. for irrigation, small holes are clogged and irrigation cannot be performed. Therefore, it is necessary to frequently replace or clean the water supply pipe. there were.

Accordingly, an object of the present invention is to provide a drip irrigation device capable of supplying irrigation to the end even on an uneven farm without clogging of a drip irrigation hole.

[0010]

A drip irrigation device according to the present invention for solving the above-mentioned problems is a drip irrigation device having a drip irrigation port in a water pipe made of a thermoplastic synthetic resin.
Rolling the sheet of thermoplastic synthetic resin on the water supply tube
The upper surface of the one side edge by overlapping the lower surface of the other side edge contact <br/> to wear formed so as to form a single tubular shape, the said transmission for water tube
On the bottom wall surface facing the bonding part between the both side edges in
Opening the irrigation port along the length of the tube
In addition, the inner wall of the bottom of the tube below the hollow section of the tube has no water absorption.
A woven fabric is attached along the length of the tube to cover the irrigation port.
Above the hollow section of the tube, the water absorption
Characterized by forming a flow channel for irrigation without a conductive nonwoven fabric .

[0011]

Further, the drip irrigation device according to the present invention is a half-split body having flanges on both edges and a half-split body extending over both flanges of the half-split body.
A water supply pipe comprising a lid or a cover which covers the open surface of the cover substantially flat is formed of a sheet-shaped or film-shaped thermoplastic synthetic resin, and an irrigation port for drip irrigation is provided between the flange and the lid. And a water-absorbent nonwoven fabric is attached to the upper surface of the half body and the flange .
And the upper part and the lid of the water-absorbent non-woven fabric excluding the flange.
A water passage having no water-absorbent nonwoven fabric is formed between them.

[0013]

[0014]

Embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an example of a drip irrigation device according to the present invention, and FIG. 2 is a perspective view showing a bottom surface of the drip irrigation device of FIG.

As shown in FIGS. 1 and 2, a drip irrigation device 1
Has a water supply pipe 2 made of a thermoplastic synthetic resin, and an irrigation port 3 for drip irrigation drilled at a lower portion (lower surface) of the pipe 2.

The thermoplastic synthetic resin forming the water supply pipe 2 is not particularly limited, but various thermoplastics such as polyolefins such as polyvinyl chloride, polyethylene and polypropylene, ethylene vinyl acetate copolymer, polyester and polyamide. Synthetic resins can be used. The resin may be in the form of a film, a sheet, or a water-impermeable nonwoven fabric.

In the present embodiment, the irrigation port 3 for drip irrigation comprises a plurality of small holes, and the plurality of small holes are formed at predetermined intervals in the longitudinal direction of the water supply tube 2. Has been established. The shape of the small hole may be any of a circle, a square, a line, and the like. The size of a stoma is generally
It may be about 0.5 to 10 mm, and the present invention has an advantage that clogging does not occur even if the diameter is small. Further, conventionally, it was necessary to apply high pressure to the water supply pipe to instill irrigation water from a small-diameter irrigation port, so that the design of the irrigation port diameter was required to be very strict. On the other hand, in the present invention, since the pressure of the irrigation does not directly apply to the irrigation port due to the presence of the water-absorbent nonwoven fabric described later, the diameter of the irrigation port does not need to be strict as in the past, and the design of the irrigation port is facilitated. There is an effect.

In FIGS. 1 and 2, reference numeral 4 denotes a water-absorbent nonwoven fabric attached to the inner wall of the tube 2. As the water-absorbent non-woven fabric, a non-woven fabric sheet that can transmit water and / or transport water by capillary action is used. Generally, polyethylene, polypropylene, ethylene propylene copolymer,
A nonwoven fabric sheet made of a thermoplastic synthetic resin having excellent corrosion resistance, such as an ethylene-vinyl acetate copolymer, polyester, polyamide, and polyacrylonitrile, is mainly used. The thickness of one sheet of the water-absorbing nonwoven fabric sheet is not particularly limited, but a thickness of 0.1 to 50 mm is generally used. The fiber density of the nonwoven fabric is selected to be dense enough to prevent the passage of suspended matter such as mud. Note that a nonwoven fabric made of natural fibers such as cotton and pulp may be used within the scope of the present invention.

In the embodiment shown in FIG. 1, the water-absorbent nonwoven fabric 4 is provided on the inner wall of the water supply tube 2 so as to cover the irrigation port 3 for drip irrigation. The water-absorbent nonwoven fabric 4 can be attached to the inner wall of the water-feeding tube 2 by using an adhesive or by heat sealing.

When an adhesive is used, it is preferable not to apply the adhesive around the watering port 3 for drip irrigation in order to avoid clogging of the water-absorbent nonwoven fabric.

The water-absorbent nonwoven fabric 4 is preferably continuous in the longitudinal direction, and the seam of the water-absorbent nonwoven fabric 4 is desirably abutted or overlapped with each other.

As a means for manufacturing the drip irrigation device 1 shown in FIGS. 1 and 2, a thermoplastic synthetic resin sheet 2A is formed in a belt shape as shown in FIG.
After a predetermined interval, a water-absorbent nonwoven fabric 4 is provided so as to cover the irrigation port 3 as shown in FIG. 4, and then both sides 2B and 2B of the sheet 2A are rolled and heat-sealed. Method. 1 and 2, reference numeral 5 denotes a heat sealing portion.

In the drip irrigation device 1 shown in FIGS. 1 and 2, for example, when the tube 2 is laid horizontally on the ridge surface, an irrigation flow path 6 is formed above the hollow section of the tube 2. The water-absorbent nonwoven fabric 4 is attached to the lower part of the cross section.

When irrigation is supplied to the flow path 6 in the tube 2,
The irrigation that has passed through the water-absorbent nonwoven fabric 4 reaches the irrigation port 3,
It is instilled on the furrow. The advantage of using the drip irrigation device 1 of such a form is that the water-absorbent nonwoven fabric 4 exhibits a filtering action and does not cause clogging of the irrigation port 3 even if some floating substances are contained in the water. Further, since it is not necessary to increase the pressure of the irrigation water supplied to the flow path 6, there is an advantage that the cost of water supply power can be reduced. Further, as described above, there is an advantage that the design of the irrigation port is facilitated.

[0026] Next, another embodiment of the drip irrigation device according to the present invention will be described with reference to FIG. That is, in the embodiment shown in FIG. 5 , the half body 7 having the irrigation port 3 for drip irrigation and the half body 8 having no irrigation port are joined at the joining portion 9 with the partition member 10 interposed therebetween. A tube is formed.

The half bodies 7 and 8 can be formed by bending a thermoplastic resin sheet, and the partition member 10 can be made of a synthetic resin film. The partition member 10 has one or more through holes 11
Are formed. If the through hole is a round hole, the diameter number
It can be set appropriately between mm and several cm.

Numerals 12 and 13 are two cavities defined by two halves 7 and 8 on both sides of the partition member 10. A channel 6 for supplying irrigation water to the cavity 13 is formed.

In the other cavity 12, the water-absorbent nonwoven fabric 4 is provided along the entire length of the water-supplying tube along the entire cross section. Water absorption
As the non-woven fabric 4, a thick non-woven fabric, generally 2 to 50 mm
It can be used from, overlapping a plurality of thin
You can also. The irrigation port 3 is covered with a water-absorbent nonwoven fabric 4.

A flange 7A, 7A, 8A, 8A is formed on each side edge of the two half bodies 7, 8, and a partition member 10 is provided between the two flanges 7A, 7A, 8A, 8A. By dipping and joining, the drip irrigation device of the form shown in FIG. 5 can be manufactured. The joining means may be any of heat sealing (thermal fusion), adhesion and the like, but heat sealing is preferable.

[0031] Next, another embodiment of the drip irrigation device according to the present invention will be described with reference to FIG. That is, in the embodiment shown in FIG. 6 , a water supply pipe is formed by the half body 14 having the flanges 14A, 14A on both edges and the lid 15, and the half body 14 and the flange 14A,
A water-absorbent nonwoven fabric 4 is provided along the upper surface of 14A.

In this embodiment, the thick portion of the water-absorbent nonwoven fabric 4 located between the flanges 14A, 14A and the lid 15 serves as a watering port for drip watering. The irrigation flow path 6
Is formed.

The half body 14 and the lid 15 sandwiching the water-absorbent nonwoven fabric 4
The means for bonding may be any of heat fusion, adhesion and the like, but adhesion with an adhesive is preferable from the viewpoint of preventing the water permeability of the water-absorbent nonwoven fabric from decreasing.

Furthermore, as shown in FIG. 7, a nonwoven fabric 4 in the innermost layer
Is wound in a tubular shape, and the outside of the
It is also possible to form the water supply pipe 2 by covering with a plastic material 18 and spirally winding a molten synthetic resin along a connecting portion 19 of the porous body 18, providing a rib 20 and integrating them.

It is preferable that the above-mentioned porous tube is spirally wound in the form of a strip made of a stretched plastic flat yarn or a woven fabric of a split yarn obtained by spreading the drawn flat yarn.

The embodiments of the present invention have been described above. In each of the above embodiments, more reliable watering can be achieved by extending the water-absorbent nonwoven fabric from the watering opening to the outside.

[0037]

As described above, according to the present invention, it is possible to provide a drip irrigation device which does not clog the drip irrigation hole and can supply irrigation to the terminal even on an uneven farm.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing an example of a drip irrigation device of the present invention.

FIG. 2 is a partial perspective view showing a bottom surface of the drip irrigation device of FIG. 1;

FIG. 3 is a perspective view showing a production example of the drip irrigation device of FIG. 1;

FIG. 4 is a perspective view showing a production example of the drip irrigation device of FIG. 1;

FIG. 5 is a schematic sectional view showing another example of the drip irrigation device of the present invention.

FIG. 6 is a schematic sectional view showing another example of the drip irrigation device of the present invention.

FIG. 7 is a partially cut oblique view showing another example of the drip irrigation device of the present invention .
View

[Explanation of symbols]

 1: drip irrigation device 2: water supply tube 3: watering port 4: water-absorbent non-woven fabric 5: heat seal portion 6: flow path 7: half body 7A: flange 8: half body 8A: flange 9: joining Part 10: Partition member 11: Through hole 12: Cavity 13: Cavity 14: Half body 14A: Flange 15: Lid 16: Inner tube 17: Outer tube 18: Porous body 19: Connection part 20: Rib

Claims (2)

(57) [Claims] 1. A drip irrigation device having a drip irrigation port in a drip irrigation tube made of a thermoplastic synthetic resin, wherein the drip irrigation tube is formed by rolling a sheet-shaped thermoplastic synthetic resin into one side edge.
The lower surface of the other side edge is overlapped and adhered to the upper surface of the water supply pipe so as to form one cylindrical shape.
The length of the tubular body is placed on the bottom wall surface facing the bonding portion between both side edges.
Open the irrigation port along the
A water-absorbent non-woven fabric is coated on the inner wall surface at the bottom of the tube at the lower part of the cavity
The irrigation port is covered along the length direction of
At the top of the cross section, the water-absorbent nonwoven fabric is provided on the inner wall
A drip irrigation device characterized by forming no irrigation flow path . Wherein both of the halves and semi divisions having a collar portion on both edges
A water supply pipe comprising a lid or a lid which covers the open surface of the half body substantially flat over the flange is formed of a sheet-shaped or film-shaped thermoplastic synthetic resin. An irrigation port for drip irrigation is provided therebetween, a water-absorbent nonwoven fabric is provided on the upper surface of the half body and the flange, and a water- absorbent nonwoven except for the flange is provided.
A drip irrigation device characterized by forming an irrigation flow path without the water-absorbent nonwoven fabric between the upper part of the cloth and the lid .