JPH018115Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to an automatic irrigation device for pot cultivation.

In general, the amount of water consumed by pot-grown plants varies depending on the size of the plant, especially the leaf area. However, the conventionally used automatic irrigation systems,
It has become mainstream to use timers and solenoid valves to water the plants at fixed times and in fixed quantities according to the plants in specific pots, but such devices do not allow accurate moisture management; Alternatively, individual pots are placed on a platform and the weight loss is converted into an electrical signal to operate a solenoid valve, or a tension meter filled with water senses the dryness of soil moisture and transmits it to a solenoid valve. Although devices have also been adopted, these devices have disadvantages such as the need for an electrical system, making the devices complicated.

The purpose of the present invention is to improve such inconveniences and to provide a device that uses a tension meter but can automatically irrigate water without intervening an electrical system.

To explain this with reference to the illustrated embodiment, 1 is a pot, and 2 is a tension meter. The meter 2 is formed with a sealed water tube that encloses water and has a porous cup 3 at its end. The porous cup 3 was buried in the soil so that it was buried, and a branch pipe 4 was branched at the top thereof, and the branch pipe 4 was connected to a mercury column 5 in which mercury was sealed. The mercury column 5 is connected to a first parallel to the mercury column 5 through a communication path 6 bent at right angles from the bottom of the mercury column 5.
A mercury column 7 and a second mercury column 8 are arranged side by side, and a nozzle 12 is arranged on the first mercury column 7 at the top of the pot 1.
A water supply channel 9 leading to the nozzle 12 was connected to the second mercury column 8, and a water supply channel 11 leading to a water tank 10 having a higher head than the nozzle 12 was connected to the second mercury column 8.

Thus, when the soil water tension in the connected pot 1 and the water tension in the tension meter 2 are in equilibrium, the head height of the mercury column in the irrigation system is equal to the nozzle 12.
A second mercury column 8 connected to a water tank 10 higher than the position of
Due to the difference in head, the pressure is high at the first head.
Lower than 7 columns of mercury.

Next, to explain its operation, when the soil moisture content in the pot 1 decreases, the soil moisture tension increases, and the ratio between the tension of the tension meter 2, which is a sealed water system, and the soil moisture tension changes, and the porous cup 3 At the same time, water is sucked out from the mercury column 5, and at the same time, the mercury column 5 is sucked up through the branch pipe 4 connected thereto, and in conjunction with this, the first mercury column 7 and the second mercury column 8 move to the mercury column 5, and both heads are lowered. Therefore, the height of the head of the mercury column 5 increases by the amount of water sucked out from the porous cup 3. At this time, when the head of the second mercury column 8 reaches the communication path 6 and further reaches the branching part of the first mercury column 7, even if mercury remains in the first mercury column 7, water with a light specific gravity flows through the nozzle 1.
Due to the pressure of the head of the water tank 10 which is higher than the position 2, the mercury floats up between the first mercury columns 7 through the water supply channel 11, passes through the water supply channel 9, and enters the pot 1 from the nozzle 12 at the tip.
is irrigated. Furthermore, due to irrigation, the movement of the supplied water in the pot 1 moves to the lower layer, and when it reaches the outer peripheral surface of the porous cup 3 and the buried layer soil, the soil moisture content increases and the soil water tension decreases, and due to the gravity of the mercury column 5. Through the outer peripheral surface of the porous cup 3, water corresponding to the volume of soil moisture sucked into the tension meter 2 is sucked in, and the first mercury column 7 and the second mercury column 7 are
The head of the mercury column 8 returns to its original height, and at the same time, irrigation is automatically stopped.

According to the present invention, a mercury column 5 is connected via a branch pipe 4 to the tension meter 2, which is buried in the pot 1 so that the terminal porous cup 3 is buried therein. A first mercury column 7 and a second mercury column 8 are arranged side by side via a communication path 6 leading to the pot 1, and the first mercury column 7 is connected to the water supply channel 9 of the nozzle 12 disposed at the upper part of the pot 1. 2. Since the mercury column 8 is connected to the water passage 11 leading to the water tank 10 at a higher head than the nozzle 12, an irrigation system using the tension meter 2 is used, but an electric system is used for this as in the conventional example. Since the water content can be controlled using the mercury column without any waste, the device becomes simple and its handling becomes easy.

[Brief explanation of the drawing]

The drawing is a schematic diagram showing an embodiment of the present invention. 1...pot, 2...tension meter, 3...
...Porous cup, 5...Mercury column, 6...Communication path, 7...First mercury column, 8...Second mercury column, 9...
... Water supply channel, 10 ... Water tank, 11 ... Water channel, 12
……nozzle.

Claims (1)

[Scope of utility model registration request] A tension meter 2 filled with water and having a porous cup 3 attached to its terminal is buried in a pot 1 having a nozzle 12 connected to a water supply channel 9 at the top so that the porous cup 3 is buried, A mercury column 5 is connected to the tension meter 2 via a branch pipe 4, and a first mercury column 7 and a second mercury column 8 are arranged side by side via a communication path 6 leading to the bottom of the mercury column 5. An automatic watering device for pot cultivation characterized in that the water supply channel 9 is connected to the mercury column 7, and the water channel 11 leading to the water tank 10 whose head is higher than the nozzle 12 is connected to the second mercury column 8.