Water supply method using a communicating pipe and water supply device using the same

Abstract

Automatic irrigation systems have the problem that the amount of irrigation water flowing upstream and downstream can become uneven due to the long irrigation tubes. [Solution] The water supply method using a communicating pipe and the water supply device using this have solved the problem of uneven irrigation amounts between the upstream and downstream sides of a long irrigation tube.

Description

[Technical Field]

[0001] The present invention relates to a method for supplying water to crops and a water supply device using the same. [Background technology]

[0002] Watering is an important research topic when growing crops. Watering cans or pitchers are used daily or every few days, or timers and moisture meters are used to save labor. Automatic irrigation systems are also used. The same applies to water used in this study, even if a diluted nutrient solution is used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7262706 [Non-patent literature]

[0004] [Non-Patent Document 1] Modern Agriculture, Rural Culture Association, January 2024, P. 143 [Non-patent document 2] Modern Agriculture, Rural Culture Association, August 1998, P. 286 [Non-patent document 3] Nutrient soil cultivation for vegetables and flowers General incorporated association Rural Culture Association March 10, 2000 Kazuo Roppongi, Toshihiro Kato P, 46 Summary of the Invention [Problem to be solved by the invention]

[0005] The automatic irrigation device described above (0002) has the following two problems. The first problem is that the irrigation tubes become clogged with debris, etc. One solution to this problem is shown in the section entitled "Two irrigation systems" on page 286 of Non-Patent Document 2. The second problem is that as the irrigation tube becomes longer, the amount of irrigation water becomes uneven between the upstream and downstream. This is shown in the upper diagram on page 143 of Non-Patent Document 1 and Figures 2-7 on page 46 of Non-Patent Document 3. In the upper diagram on page 143 of Non-Patent Document 1, for sprinkler B, the discharge ratio drops to about 50%. For drip infusion A, B, and C, the drop in discharge ratio is small, but the first half of the lower diagram on page 143 points out the need to frequently clean the filter. [Means for solving the problem]

[0006] We previously filed a patent application in Patent Document 1 (Patent No. 7262706) to address the above issues, but the structure was complicated. There was also the inconvenience of bends at the joints. We also proposed a solution to the problem of uneven irrigation flow between the upstream and downstream.

[0007] Figure 1 shows a communicating pipe, which consists of a horizontal pipe structure a, three rising pipe members b, and an injection pipe member c. As shown in Figure 2, the horizontal pipe structure a can be horizontal a1, inclined a2, U-shaped in plan a3, or a modified Y-shaped in plan a4. The U-shaped and modified Y-shaped structures allow water, etc., to flow freely through each member. The rising pipe member b and injection pipe member c can be located at any position on the horizontal pipe structure a, and are connected using a cheese when using PVC pipes. There may be even more rising pipe members b. This will be explained in detail in the description for carrying out the invention.

[0008] When water is poured into the top of the injection pipe member c, the water fills each of the rising pipe members b to the same height. This is shown in Figure 1 by arrows, dotted lines, water marks, etc. In large structures, multiple injection pipe members c may be used.

[0009] Figures 3(a), (b), and (c) show the use of cheese to extract water. If the inner diameter of the extraction pipe is 13 mm, a 1 mm height error above or below the center will result in a 19% error in the outflow volume. This is shown by the dotted line in Figure 3(c). (13 * 1) ÷ (3.14 * 6.5 * 6.5 ÷ 2) * 100 = 19%. To reduce this error, the method shown in Figure 4 is used. The cross-sectional area of the water extraction port is reduced so that when water is injected, the water level quickly exceeds the water mark in Figure 4. This is further shown in the form for implementing the invention. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. [Figure 2] FIG. 1 shows a transverse tube structure. [Figure 3] This is a diagram showing the use of cheese to extract water. [Figure 4] This shows how a horizontal position is marked with a surveying instrument and an extraction pipe is installed there. [Figure 5] FIG. 10 is a diagram showing the installation of a take-out pipe using a transparent pipe. [Figure 6] FIG. 6 is a diagram showing the flow of water in the case of FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0011] The connecting pipe shown in Figure 1 is made from a PVC pipe with an inner diameter of 13 mm. A tee is used for connection. In the case of Figure 1, there are three riser pipe members b, but there are cases where there are more. As shown in Figure 4, mark m on each riser pipe member b using a surveying instrument to mark the horizontal position. When there are only a few, a method using a transparent tube t1 and filling it with water can also be used, as shown in Figure 5. Drill 4 mm holes at these positions to make extraction ports t3. Insert a tube with an outer diameter of 4 mm and an inner diameter of 2.5 mm into these holes to make extraction pipes t2.

[0012] As shown in Figure 5, outlet t3 was installed, and outlet tube t2 was installed there. Water was poured from inlet tube c, filling up to the water mark on rising tube b (Figure 1). Next, 500 ml of water was poured into a measuring cup and poured from inlet tube c as shown in Figure 1. When the water was poured out and measured as shown in Figure 6, the three measurements were 165 ml, 175 ml, and 160 ml, respectively, from the left side. The error was 15 ml. The measurement took approximately 55 seconds. The water level remained above the water mark (Figure 6) for most of the time. Even if there was a 5 mm error in the height of the outlet tube, the resulting volume would be minimal. 3.14 * 0.65 * 0.65 * 0.5 ≒ 0.66 ml. The difference between 175 and 160 ml is due to frictional resistance in the tube and other factors. Three cheese-shaped objects were placed as shown in Figure 1, and the drop volumes were measured. The results were 200 ml, 150 ml, and 150 ml. The water levels were approximately at the upper and lower dashed lines in Figure 3(c). The time was about 10 seconds. The error was 15 ml for 50 ml and 4 mm. This is 3.3 times the amount.

[0013] In actual field use, the rising pipe components are spaced, for example, 20 to 50 cm apart, and many are used for potted plants or bag cultivation. Alternatively, the intervals are set at 2 to 3 m, with PVC pipes with elbows on both ends installed horizontally, holes drilled at 20 cm intervals, and water is poured into one elbow using this device, which then uses nonwoven fabric to suck up and drop the water. Watering can be done manually, or with a pump, a water tank, or a timer. [Explanation of symbols]

[0014] a Lateral tube structure b. Rising pipe member c. Injection pipe member m Mark for drilling position t1 transparent tube t2 Extraction pipe t3 ejection port

Claims

1. a plurality of riser pipe members and one or more injection pipe members are connected to the horizontal pipe structure, and water (or a thin nutrient solution, the same applies hereinafter) is injected through the injection pipe members to fill each of the plurality of riser pipe members with water to the same height; Each of these riser pipe members has an outlet pipe at the position where it is filled with water, and when further water is poured in, the water level immediately exceeds the position of the outlet pipe at the water mark. This is a structure that uses the entire cross section of the outlet pipe, and each of the riser pipe members has an outlet pipe of the same cross section area, so this is a method of supplying the same volume of water. Water supply method using a communicating pipe.

2. A water supply system using a communicating pipe according to the method of claim 1.

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