JPS6251937A - Drip type irrigation apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in an apparatus for automatically dripping culture water into a large number of cultivation containers such as flowerpots.

[Prior art] A conventional automatic drip irrigation system consists of a culture water tank, a solenoid valve installed at its outlet, a branch pipe from the solenoid valve to each flower pot, and a drip port attached to the tip of the branch pipe. The culture water was dripped into each flowerpot by opening and closing a solenoid valve using a timer. Therefore, when the number of flower pots becomes very large, the difference in length from the solenoid valve to the drip opening becomes large, and it is impossible to water each flower pot evenly unless the drip opening is adjusted. However, it has been practically impossible to adjust the drip opening, for example, to change its diameter depending on the distance from the solenoid valve.

In addition, since it was not possible to automatically adjust the dripping amount according to changes in the concentration of culture water, it was necessary to maintain the concentration of culture water at a constant level. It wasn't easy to do.

[Problems to be Solved by the Present Invention] The present invention has been made to solve the above-mentioned problems, and its purpose is to prevent dripping even if the number of cultivation containers to be fertilized and watered is very large. We have created a device that can apply a predetermined amount of fertilization water almost evenly to each cultivation container without adjusting the opening, and can also automatically adjust the amount of dripping according to fluctuations in the concentration of culture water. It is about providing.

[Means for Solving the Problems] In order to achieve the above object, the features of the present invention include the following:
A relatively small head is applied to the culture water in the main tank, and the culture water is sent to the pipes leading to each cultivation container via a solenoid valve.
A flow path with greater resistance than the intermediate pipe is formed at the drip opening at the tip of the pipe, and the concentration (conductivity) of the culture water in the main tank is measured, and the measured value is input into the computer to open and close the solenoid valve. The reason is that the time is set and the solenoid valve is opened and closed using the computer's output.

[Function] A flow path with the same shape is formed at all the dripping ports, and the wave path is considerably larger than the resistance of the pipe leading from the solenoid valve to the dripping port, and the head of the culture water in the pipe is relatively small. Because they are small, the amount of culture water dripped from each drip port is not affected by the length of the pipe from the solenoid valve to the drip port, and is almost the same. The fertilizer concentration in the culture water is detected as electrical conductivity and input into the computer. The computer compares the input detection value with a preset reference value, sets the time to open and close the solenoid valve, and outputs it to the relay control output generator to open and close the solenoid valve.

[Example] The apparatus of the present invention will be explained based on embodiments shown in the drawings.

As shown in FIG. 1, a water pipe 11 for injecting water such as tap water and a liquid fertilizer pipe 12 for injecting liquid fertilizer are opened in the main tank 10. Liquid fertilizer pipe 12 is a pump! Liquid fertilizer tank 1 through 3
Although only one liquid fertilizer tank is shown in Figure 4, a plurality of liquid fertilizer tanks are usually prepared and a plurality of different liquid fertilizers are supplied to the main tank.

At the outlet of the main tank 10 there is a water pump 15 and a filter 1.
8. The pressure reducing valve 17 and the solenoid valve 18 are connected in sequence. Solenoid valve 18
The main pipe 2 is relatively thick, for example, with an inner diameter of 25 to 30 mvr.
0 is connected. The length of the main pipe is about 5m,
It is connected via a joint 21 and extends between a large number of cultivation containers 30 arranged in the greenhouse. A branch port 22 is provided in the main pipe 20, and a branch pipe 25 protrudes from the branch port and reaches each cultivation container 30.

The branch pipe 25 is relatively thin, for example, has an inner diameter of 2 to 3 mrx, and a drip port 40 is provided at its tip. Cultivation container 30
Inorganic artificial soil is placed in the soil, and tomato and other seedlings are planted in this soil.

As shown in FIG. 2, the branch pipe 25 is supported by a support 24 inserted into the soil of the cultivation container 30. The dripping port 40 consists of an outer cylinder with a bottom and an inner cylinder 42 inserted into the outer cylinder 4! is provided with an inlet 43 and an outlet 44, and the inlet 43 is inserted into the tip of the branch pipe 25.

As shown in FIG. 3, the drawing of the inner cylinder 42 of the dripping port 40 is provided with comb-like protrusions 45, and the grooves between the protrusions 45 form a narrow, curved continuous flow from the inlet 43 to the outlet 44. A path 46 is formed.

As shown in FIG. 1, a sensor 31 for detecting conductivity is attached to the main tank 10, and its signal is input to a computer 32. The output of the computer is input to a relay control output generator 33 such as a timer, and the relay control output generator turns the solenoid of the solenoid valve 18 on and off.

Next, fertilization and irrigation using the apparatus of the present invention will be explained. The liquid fertilizer in the liquid fertilizer tank 14 is supplied to the main tank 10 via the pump 13 and the liquid fertilizer pipe 12. A water pipe 11 is connected to the main tank 10.
The culture water shown in Figure 1 is diluted by injecting water. The concentration of the culture water is detected as conductivity by a sensor 31, and the signal is input to a computer 32. The computer 32 calculates the dripping time according to a preset standard, for example, 15 minutes each time if the dripping time is four times a day, and outputs a signal to the relay control output generator 33 that starts the water pump 15 when the dripping time arrives. Rotate the water pump 15. The culture water is pressurized by the rotation of the water pump 15, but the pressure is reduced to a predetermined pressure, for example 1 by the pressure reducing valve 17.
, 1 to 1, and the pressure is reduced to 5Kg/cm". Then,
Since the computer 32 opens the solenoid valve 18 via the relay control output generator 33, the culture water flows from the solenoid valve 18 to the main pipe 2.
0, drips into the soil of the cultivation container 30 from the dripping port 40 via the branch pipe 25. After a certain period of time has elapsed, the computer 32 closes the solenoid valve 18 through the relay control output generator 33, so that the dripping of culture water is stopped.

At the same time, the water pump 15 also stops.

Although the lengths of the pipes from the solenoid valve 18 to each dripping port 40 are different, the resistance of the flow path 4B (FIG. 3) formed inside the dripping port 40 is greater than the resistance of the pipe. The amount of culture water supplied to the cultivation container 30 from each dripping port is approximately the same.

Since the culture water passes through the filter 16, there is no risk that the flow path 46 of the dripping port 40 will be clogged with sediment or the like in the culture water.

Although not shown, the means for imparting a relatively small head to the culture water and sending the water to the drip port need not be limited to pumps and pressure reducing valves, and the main tank may be constructed at a height that provides the desired head. good.

The device of the embodiment is intended to irrigate cultivation containers in which only the same type of plants are grown, but the device of the present invention can irrigate two or more cultivation containers by branching the solenoid valve and main pipe. It can also be applied to containers, and different amounts of fertilization and water can be applied to different cultivation containers.

[Effects of the Invention] As mentioned above, the drip irrigation device of the present invention not only can drop a predetermined amount of culture water almost evenly into a large number of cultivation containers, but also allows the dripping amount to vary depending on the concentration of the culture water. It has a special effect that conventional methods do not have, in that it is automatically adjusted.

[Brief explanation of drawings]

1 is a circuit diagram schematically showing an apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of the drip opening in FIG. 1, and FIG. 3 is a sectional view of the drip opening in FIG. 2. In the figure, numeral 10 is the main tank, 17 is the pressure reducing valve, and 18 is the main tank.
is a solenoid valve, 20 is a main pipe, 25 is a branch pipe, 30 is a cultivation container,
31 is a sensor (conductivity detection means), 32 is a computer (calculation means), 33 is a relay control output generator, 40 is a dripping port, 41 is an outer cylinder, 42 is an inner cylinder, 43 is an inlet, 44 is an outlet, 45 46 represents a protrusion, and 46 represents a flow path. Applicant: Aratsubu International Co., Ltd. Agent
Hajime Kawakami (2 others) Figure 3 Motouri Masaru Neichi September 24, 1985 Director-General of the Possessive Fraud Agency Uga Michibe 1 Indication of IS 1985 Patent Application No. 189398 2 , Name of the invention Drip irrigation device 3, Person making the amendment/Relationship with 19 cases Name of patent applicant: Aratsub International Co., Ltd. 4, Agent 5, Date of amendment order Voluntary action 6, Number of inventions increased by the amendment None Contents of the amendment (1) The scope of the claims is amended as follows. l) A main tank containing culture water, a main pipe connected to the tank through one stage, and a main pipe branched from the main pipe. In a device consisting of a branch pipe leading to each cultivation container and a dripping port attached to the tip of the branch pipe, there is a means for detecting the concentration of the main tank culture water, and a means for detecting the concentration of the culture water on the tongue based on the detected concentration. and a relay control output means for elongating the flow rate based on the calculated time, and a relay control output means for increasing the flow rate at the dripping port, the flow resistance being greater than the flow path resistance of the main pipe and the branch pipe. 1. A dripping type irrigation device characterized by forming channels through which approximately the same amount of culture water is dripped from each dripping port into each of the cultivation containers. 2) The drip irrigation system according to claim 1, wherein the water supply means for discharging the culture water comprises a pedestal for disposing the main tank at a constant height. 3) The drip irrigation device according to claim 1, wherein the water supply means for delivering the culture water is a Bon A woman. 11 The dripping port consists of an outer cylinder with an inlet, an outlet, and a bottom, and an inner cylinder inserted into the outer cylinder from above, and a groove extending from the inlet to the outlet while bending in a comb shape on the same surface of the inner cylinder. The drip irrigation device according to claim 1, characterized in that a flow path is formed in the shape of a shape. (2) Add the following sentence to the fifth line from the bottom of the second page of the specification. "Here, the dripping device refers to a system that discards the J8 nutrient water poured into the cultivation container without recycling it, a so-called non-circulating culture system." (3) Specification, page 4, line 5. , “Solenoid valve” in lines 9, 10, 14, and 17
should be corrected to "water supply means such as solenoid valves and pumps." (4) "Solenoid valve" in the second and third lines of page 5 of the specification is corrected to "water supply means such as solenoid valve, pump, etc." (5) "Two parts" in line 16 of page 8 of the specification and "each part" in line 17 are corrected to "two groups" and "each group." (6) Insert the following sentence between lines 12 and 13 on page 8 of the specification. "Also, when the water pump 15 is provided, the solenoid valve 18 can be omitted. In this case, the water pump 15 is started and stopped by the signal from the relay control output generator 33."

Claims (1)

[Scope of Claims] 1) A main tank containing culture water, a main pipe connected to the main tank via a solenoid valve, a branch pipe branching from the main pipe and leading to each cultivation container, A device comprising a dripping port attached to the tip of a branch pipe, and means for pressurizing the main tank culture water and sending it to the main pipe, comprising: a means for detecting the concentration of the main tank culture water, and a means for detecting the concentration of the main tank culture water; means for calculating the opening/closing time of the solenoid valve based on the calculated concentration; and a relay control output means for opening/closing the solenoid valve based on the calculated opening/closing time. 1. A drip irrigation device characterized in that a flow path having a resistance greater than that of the flow path resistance is formed, whereby approximately the same amount of culture water is dripped from each drip port into each of the cultivation containers. 2) The drip irrigation device according to claim 1, wherein the means for delivering the culture water comprises a pedestal for arranging the main tank at a constant height. 3) The drip irrigation device according to claim 1, wherein the means for delivering the culture water comprises a pump followed by a pressure reducing valve. 4) The dripping port consists of an outer cylinder with an inlet, an outlet, and a bottom, and an inner cylinder inserted into the outer cylinder from above, and extends from the inlet to the outlet while bending in a comb shape on the circumferential surface of the inner cylinder. The drip irrigation device according to claim 1, characterized in that a groove-like flow path is formed.