JP2005160358A - Drip watering tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drip watering tube for evenly watering through enabling adjusting pressure and flow volume in drop watering, and having a connection structure with the branched pipe of the water supply pipe of a water storage tank hardly clogging up watering holes. <P>SOLUTION: This watering drip tube 2 is connected with the branched pipe 5 connected with the water storage tank 1 of drip watering facilities through giving difference in height from the tank 1. A porous material 6 is filled in the flow passage 2b of the connection part 2a of the watering drip tube 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drip irrigation tube used for drip irrigation and supplied from a water storage tank, and more particularly to a drip irrigation tube having a filtration function while reducing the pressure of water supplied from the water storage tank.

  In greenhouse horticulture, orchards, etc., a method of pressurizing crops with an engine pump or a motor and irrigating a large amount of water in a short time using a tube or sprinkler system has been used.

  Recently, in order to make effective use of water, a drip irrigation technique in which water is locally irrigated and permeated like rainwater has begun to be used. Drip irrigation has the advantage that the amount of water used is greatly reduced compared to the conventional sprinkler watering method. The drip irrigation is described in Patent Literature 1, Patent Literature 2, and the like.

  FIG. 2A is a schematic diagram showing an example of a conventional drip irrigation facility. The water storage tank 1 is placed on a gantry 3 or a plurality of stacked blocks so as to have a drop between the drip irrigation tube 2 connected to the water storage tank 1. The drip irrigation tube 2 is connected to a water supply pipe 4 connected to the water storage tank 1 via a branch pipe 5 provided at an interval. The drip irrigation tubes 2 can be connected to form a water passage having a required length according to the length of the ridge. In the drip irrigation tube 2, drip irrigation nozzles for drip the supplied water are formed at intervals.

  FIG.2 (b) is a figure which shows an example of drip irrigation around a trunk in an orchard. In this example, the drip irrigation tube 2 connected to the branch pipe 5 is connected in a ring around the trunk and drip irrigated around the trunk.

  In the drip irrigation facility, the water in the water storage tank 1 passes through the water supply pipe 4 by gravity and is supplied to each drip irrigation tube 2 connected to the branch pipe 5 of the water supply pipe 4. The water supplied to the drip irrigation tube 2 is dripped from the drip irrigation nozzle, and the drip water penetrates into the soil.

  Furthermore, in order to use the drip irrigation facility more efficiently and efficiently, a low drop type irrigation facility using a low drop of about 50 cm has begun to be introduced as a drip irrigation facility for facility horticulture and outdoor crops.

In particular, a low-drip drip irrigation facility can be irrigated with a low water pressure of about 0.1 atm when it is installed at a height of about 1m30cm by adding several blocks under the water tank and adding it to the water level in the water tank. As a result of the low pressure, the irrigation rate is extremely slow and can be irrigated for a long time compared to the conventional irrigation method. As a result, water diffuses in the vertical, horizontal, and lower parts of the soil. A certain amount of water is absorbed, and the growth of the crop is stabilized. Orchards have the advantage that local watering is possible around the trunk and a small amount of water can be used effectively.
JP 2002-300818 A JP 2001-078593 A

  The method of drip irrigation at low pressure has the above-mentioned advantages, but has the following problems.

  a. The amount of drip from the drip irrigation nozzle at the lower part of the slope or under the shelf increases due to the high water pressure, resulting in a difference in the amount of water between the low pressure part and irrigation unevenness.

  b. In shelf cultivation, piping a drip irrigation tube directly to the above-ground part hinders the passage of large weeding machines, etc., so a polyethylene pipe water supply pipe is piped on the shelf to the trunk, and a drip irrigation pipe is used for drip irrigation. A method of connecting and connecting tubes is conceivable. However, a drop of about 2 m occurs just under the shelf, and the amount of irrigation per hour increases so that the water diffusion state becomes poor and the advantages of this method are impaired.

  c. In a normal drip irrigation facility, the valve used for adjusting the water pressure is expensive, and it is uneconomical and impractical when used in large numbers.

  d. When fertilizer is mixed at the time of irrigation, or only water containing iron or other minerals may contain inclusions in the pipe and clog the drip irrigation nozzle. Especially when piped under mulch and drip irrigation, clogging is difficult to detect, so using a clogged drip irrigation tube may hinder crop growth, so when using disposable irrigation materials There are many, there is little reuse of materials, and it becomes high-cost.

  Accordingly, the present invention provides a drip irrigation tube that can be irrigated evenly by adjusting the pressure / flow rate in a drip irrigation tube supplied from a water storage tank, and the drip irrigation nozzle is less likely to clog. It is.

  The present invention relates to a irrigation drip tube that is supplied with a drop from a water storage tank of a drip irrigation facility, and is permeable to a water passage at a connecting portion of the irrigation drip tube that connects the branch pipes or the irrigation drip tubes. It is characterized by being filled with material.

  In this invention, the following effect is exhibited by filling a water-permeable material into the water passage of the connection part of the drip irrigation tube connected to the branch pipe.

  a. The pressure is reduced by the resistance of the water-permeable material at the connecting portion, and the water pressure and the drip amount can be adjusted to an acceptable level.

  b. The water-permeable material is porous and has the property of absorbing water over a wide area, and even if dust adheres to it, it can pass through water and functions as a filter material.Therefore, dust can penetrate into the drip irrigation tube. This prevents the drip irrigation nozzle from becoming clogged.

  c. It is less expensive than ordinary pressure adjustment valves. For example, when arranging drip holes in a circular shape in an orchard or the like, it is necessary to use more than 100 pieces, but the pipe connection is inserted into a tube or a thin tube Because of this method, the drip irrigation tube can be easily replaced and can be recycled.

  FIG. 1 shows an example of the connection structure of the present invention, (a) is an exploded perspective view of a supply pipe and a drip irrigation tube, and (b) is a cross section taken along the line AA of (a) showing a connection part of a drip irrigation tube. FIG. 2C is a cross-sectional view taken along the line B-B.

  In FIG. 1A, as in the conventional example shown in FIG. 2, the water storage tank has a drop between the tank and the drip irrigation tube 2 connected to the tank via the water supply pipe 4 and the branch pipe 5. And placed on a pedestal or stacked block to allow gravity to pass through.

  A plurality of branch pipes 5 for connecting the drip irrigation tube 2 are formed at intervals in the water supply pipe 4 connected to the water storage tank. Each branch pipe 5 is connected to a connecting portion 2 a formed at one end of the drip irrigation tube 2.

  The drip irrigation tube 2 has a predetermined length by connecting the drip irrigation tubes 2 by inserting the ends of the drip irrigation tubes 2 to be connected to the connecting portion 2a according to the length of the spear or the like. In addition, as shown in FIG. 2 (b), in order to perform drip irrigation around the trunk, it is possible to connect the drip irrigation tubes 2 in a ring around the trunk.

  In FIG. 1 (b) and FIG. 1 (c), one end of the drip irrigation tube 2 has a water passage 2b inside for connecting to the branch pipe 5 of the water supply pipe 4 or the drip irrigation tube 2. 2a is formed. The inner diameter of the water passage 2b is set to a dimension that allows one end of the branch pipe 5 or drip irrigation tube 2 to be inserted and fitted. The connection part 2a of the drip irrigation tube 2 is formed of a thin tube having a diameter of about 5 mm, for example, and the water passage 2b of the connection part 2a absorbs water such as string or sponge made of hemp or paper. The water-permeable material 6 is filled. Water is absorbed by the water-permeable material 6, the water pressure is reduced, and the passage of dust and the like is prevented.

  In the above configuration, the water in the water storage tank is drip irrigated through the connection portion 2a filled with the water-permeable material 6 of each drip irrigation tube 2 connected to the branch pipe 5 through the water supply pipe 4 by gravity. Instilled from the drip irrigation nozzle of the tube 2.

  In the drip irrigation device of the present invention, since the water-permeable material is filled in the connection part of the drip irrigation tube with the branch pipe, the water pressure is reduced to an allowable level by the resistance of the water-permeable material at the connection part. The amount of water flow in the irrigation tube can be adjusted, and irrigation can be performed evenly. Moreover, even if dirt adheres to a part, it can pass water and functions as a filter medium, so that the drip irrigation nozzle is less likely to be clogged.

  INDUSTRIAL APPLICABILITY The present invention can be used for drip irrigation tubes in drip irrigation facilities such as facility horticulture and orchards.

An example of the connection structure of this invention is shown, (a) is a disassembled perspective view of a supply pipe and a drip irrigation tube, (b) is AA sectional drawing of (a) which shows the connection part of a drip irrigation tube, ( c) is a sectional view taken along the line BB in FIG. It is the schematic which shows an example of the conventional drip irrigation facility.

Explanation of symbols

1: Water storage tank 2: Drip irrigation tube 2a: Connection part 2b: Water passage 3: Mounting base 4: Water supply pipe 5: Branch pipe 6: Water-permeable material

Claims (1)

In the drip irrigation equipment and the drip tube for irrigation supplied with a drop,
An infusion tube for irrigation, characterized in that a water-permeable material is filled in the water passage of the connecting portion of the infusion tube for irrigation that connects the branch pipes or the infusion tubes for irrigation.

Images