JP2002209458A - Irrigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an irrigation system capable of remarkably reducing water charges and contributing even to environmental protection by saving water resources. SOLUTION: This irrigation system is capable of successively supplying water of drain after completing water supply to a prescribed irrigation block to the next irrigation block in the irrigation system comprising a plurality of irrigation blocks A, B and C, water flow layers formed at bases of the respective irrigation blocks A, B and C and artificial lightweight soil layers formed in the upper parts of the respective irrigation blocks A, B and C and capable of carrying out water supply and drainage from the bases of the water flow layers and artificial lightweight soil layers of the respective irrigation blocks A, B and C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an irrigation system for forming artificial greening ground on the roof of a building or the like.

[0002]

2. Description of the Related Art In the greening of artificial ground by planting, such as on the roof of a building, artificial light soil materials are increasingly used, mainly of perlite-based materials having a light and water-retaining ability. However, if there is no rainfall for a long period of time even if the water retention is good, it is necessary to water again. In this case, if the planting area is a wide area, or if it is to automate irrigation, irrigation pipes will be required, such as installing watering taps from the ground and irrigation pipes on the ground, underground, bottom, etc. over the entire area, That will increase the labor and cost of piping construction. In addition, since the pipes are arranged in the planting area, replanting of the plants causes problems such as obstruction of the pipes and replacement of the pipes when changing the water supply position.

[0003] In order to solve this problem, the present applicant has
Japanese Patent Application Laid-Open No. H11-155374 proposes an irrigation system that does not require an irrigation pipe over the entire planting area and can form an artificial greening ground over a wide area at low cost.

FIG. 3 is a sectional view of the irrigation system. A side wall 8 and a bottom wall 9 are formed in an irrigation block 7 formed on a building roof or the like, and a water tank is formed by extending a water-blocking sheet 10. A water gradient 9 a is provided on the bottom wall 9. At the bottom, there is formed a water-permeable layer 11 made of a coarse-grained material that has no water retention, has very good water-permeability, and can withstand the load of the soil on the upper part. An artificial lightweight soil (perlite or the like) layer 13 serving as a planting base is formed via the conductive sheet 12. A water supply pipe 15 having a water supply valve 14 is connected to an upstream side of the water flow layer 11, and a drain pipe 17 having a drain valve 16 is connected to a downstream side of the water flow layer 11.

[0005] A watering method of the watering system having the above configuration will be described. When the need for irrigation arises,
The drain valve 16 is closed and the water supply valve 14 is opened to supply water slowly to a constant water supply level L in the water flow layer 11 and at the bottom of the artificial lightweight soil layer 13. By supplying water slowly, the entire area of the irrigation block 7 is flooded, and the artificial lightweight soil layer 13 eventually permeates and retains water from the lower surface by capillary action. When a certain water supply level L is reached, the water supply is stopped, the drain valve 16 is opened to prevent root rot and reduce the load on the building, and all the water other than the amount retained in the soil is drained from here. .

[0006]

However, in the above-mentioned conventional irrigation system, excess water is drained at the end of irrigation, which causes a waste of water resources.

The present invention has been made to solve the above-mentioned problems, and has an object to provide an irrigation system capable of greatly reducing water charges and conserving the global environment by saving water resources. Aim.

[0008]

According to the present invention, there is provided an irrigation system comprising a plurality of irrigation blocks forming a planting area, a water-permeable layer formed at the bottom of each irrigation block and an upper part thereof. In an irrigation system that includes an artificial lightweight soil layer and supplies and drains water to the bottom of the artificial lightweight soil layer and the water flow layer of each irrigation block, after the water supply to a predetermined irrigation block is completed, the drainage is sequentially transferred to the next irrigation block. The invention according to claim 2 is characterized in that a water gradient is formed in each of the irrigation blocks according to claim 1, and the invention according to claim 3 is characterized by that Item 1 is characterized in that a pF meter is installed in each of the irrigation blocks, and the water supply and drainage are controlled by a pF value.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of an irrigation system of the present invention. FIG. 1 (a) is a system configuration diagram, FIG. 1 (b) is a cross-sectional view of an irrigation block of FIG. 1 (a), and FIG. It is a block diagram of a control system.

FIG. 1 shows a plurality of irrigation blocks A, B and C forming a transplant area. The structure of these irrigation blocks A, B, and C is the same as that of the irrigation block 7 described with reference to FIG.
Therefore, the description is omitted. In this embodiment, a water gradient is provided on the bottom surfaces of the irrigation blocks A, B, and C. The number of irrigation blocks is arbitrary.

The water from the water supply source is stored in a tank T by a pump P. Fertilizer is mixed into the tank T as needed. The tank T is connected to the main water supply pipe S via a main water supply valve (supply 1).
And the main water supply pipe S and each irrigation block A, B, C
Is a water supply valve (supply 2, supply 3, supply 4) and a drain valve (discharge 1,
3). Each of the irrigation blocks A, B, and C is connected to a drain valve (discharge 2, discharge 4, discharge 5, and discharge 6) and connected to a tank T via a pump P.

As shown in FIG. 2, each irrigation block A,
Each of B and C is provided with a pF meter A, a pF meter B, and a pF meter C. Each pF meter is connected to a control panel. The control panel controls the operation of the pump P and the opening and closing of each water supply valve and drain valve. are doing. The pF meter measures the force required to suck water from the soil by the height of the water column, and is the optimum pF for plant growth.
The value is measured.

A method for watering the watering system having the above configuration will be described. The method of irrigating the individual irrigating blocks has been described with reference to FIG. Further, in the following description, “open / close” means that either open or closed may be used. When water is supplied to the irrigation block A, feed 1: open, feed 2: open, feed 3: closed, feed 4: closed drain 1: closed, drain 2: closed, drain 3: closed, drain 4: open and close, drain 5: open / close, drain 6: open / close When supplying the drainage from the irrigation block A to B, supply 1: close, supply 2: close, supply 3: open, supply 4: close discharge 1: open, discharge 2: close , Drain 3: Closed, Drain 4: Closed, Drain 5: Open / Close, Drain 6: Open / Close When supplying the shortage of the irrigation block B, supply 1: open, supply 2: closed, supply 3: open, supply 4 : Closed Drain 1: Closed, Drain 2: Open, Drain 3: Closed, Drain 4: Closed, Drain 5: Open / Close, Drain 6: Open / Close When supplying the drainage of the irrigation block B to C, supply: Closed, Drain 2: Closed, Drain 3: Closed, Drain 4: Open Drain 1: Closed, Drain 2: Open, Drain 3: Open, Drain 4: Closed, Drain 5: Closed,
Drain 6: Closed To supply the shortage of the irrigation block C, Supply 1: Open, Supply 2: Close, Supply 3: Close, Supply 4: Open Discharge 1: Close, Discharge 2: Open, Discharge 3: Close , Exhaust 4: open, exhaust 5: closed,
Drain 6: Closed When draining the irrigation block C, Feed 1: Closed, Feed 2: Closed, Feed 3: Closed, Feed 4: Closed Drain 1: Closed, Drain 2: Closed, Drain 3: Closed, Drain 4 : Closed, Discharge 5: Open,
Drainage 6: Open As described above, the drainage (excess water) is allocated to the supply of the next B block at the end of the irrigation of the A block, and the drainage is sequentially drained to the next C block at the end of the irrigation of the B block. I use it.

Next, a control method of the irrigation system of the present invention will be described. In the present invention, irrigation control is performed by (a)
Automatic control by a pF meter by designating a pF value, (b) control by calendar (designation of date and time) in consideration of weather, and (c) control by user's will are possible.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made. For example, in the above embodiment, the slopes are provided on the bottom surfaces of the irrigation blocks A, B, and C, but they are not necessarily provided, and in that case, a pump is provided.

[0016]

As is clear from the above description, according to the present invention, the water charge can be greatly reduced, and the conservation of water resources can contribute to the preservation of the global environment.

[Brief description of the drawings]

1 shows an embodiment of an irrigation system of the present invention, FIG. 1 (A) is a system configuration diagram, and FIG. 1 (B) is a cross-sectional view of an irrigation block of FIG. 1 (A).

FIG. 2 is a configuration diagram of a control system of FIG. 1;

FIG. 3 is a sectional view showing an irrigation system to which the present invention is applied.

[Explanation of symbols]

 7, A, B, C: irrigation block 11: water-permeable layer 13: artificial light soil layer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenji Nakamura 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Takashi Sato 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Corporation F term (reference) 2B022 AB04 BA04 BA21 BB02 CA02 DA19

Claims (3)

[Claims] A plurality of irrigation blocks forming a planting area;
An irrigation system comprising a water flow layer formed at the bottom of each irrigation block and an artificial lightweight soil layer formed thereon, and supplying and discharging water to the water flow layer of each irrigation block and the bottom of the artificial lightweight soil layer, An irrigation system characterized in that after completion of water supply to a predetermined irrigation block, the drainage is sequentially supplied to the next irrigation block. 2. The watering system according to claim 1, wherein a water gradient is formed in each of the watering blocks. 3. A pF meter is installed in each of the irrigation blocks,
The irrigation system according to claim 1, wherein the water supply and drainage are controlled by an F value.