JPH10337126A - Automatic water supply control device for irrigation water piping for paddy field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically and surely switch the supply of water to an irrigation water piping or the stop of the water supply. SOLUTION: This automatic water supply control device comprises a held type electromagnetic function water supply valve 2 for switching the opening or closing of an irrigation water guide pipe route 1, a motor 6 using a battery 4 as a power source, a control member 52 driven with the motor 6, a toggle switch 51 switched on or off with the control member 52, and a pressure switch 7 for monitoring the inner pressure of an air trap 8, and can automatically switch the supply of water to the irrigation water guide pipe route 1 or the stop of the water supply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to irrigation of a paddy field which is useful for water management of a paddy field provided with an irrigation and drainage pipe facility for drawing water from a water source through an irrigation and drainage pipe into a paddy field. The present invention relates to an automatic water supply control device in a water conduit.

[0002]

2. Description of the Related Art Water management in crop cultivation, such as water absorption and evaporation of crops, decreases with time, so that it is necessary to appropriately replenish the water and manage it in a predetermined level range. Water management in paddy fields relied on manual labor. However, when the number of paddy fields increased, the time required for this management work increased, and in recent years the need for unmanned operations increased.

[0003] Since the installation place is often used in a natural environment, and most of the places do not have a power supply facility, various problems are caused, and a device sufficient for practical use is realized. In a situation that has not been done.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an automatic water supply control device in an irrigation conduit of a paddy field suitable for performing water management in a paddy field equipped with an irrigation conduit system. It is in.

[0005]

To achieve the above object, an automatic water supply control device for an irrigation conduit in a paddy field according to the present invention is configured to switch an irrigation conduit between a water supply state and a water supply stop state. A water supply valve with a holding electromagnetic function that opens and closes, an air trap installed in a paddy field, a tube that guides the internal pressure of the air trap, and the internal pressure of the air trap is monitored through the tube, and the pressure is set to a predetermined high or low pressure. A pressure switch for switching the electric circuit between a battery, a motor, and a water supply valve with a holding electromagnetic function, a control member driven by the motor, and a motor and a water supply valve with a holding type electromagnetic function which are turned on and off by the control member Switch that stops power supply to the motor and waits for the next operation by changing the configuration of the electric circuit so that the motor and the water supply valve with holding electromagnetic function operate in reverse. When the water level in the paddy field drops to a predetermined low level, the water supply valve with holding electromagnetic function is started to open and water supply to the paddy field is started, and the motor is driven by switching the toggle switch to switch the motor. The power supply to the water supply valve with holding electromagnetic function is stopped, and the water supply state is maintained by the holding action of the water supply valve with holding electromagnetic function. Start to close the valve, stop water supply to the paddy field, drive the motor and switch the toggle switch to stop supplying power to the motor and the water supply valve with holding electromagnetic function, water supply valve with holding electromagnetic function The water supply stop state is maintained by the holding action of.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall view of an automatic water supply control device in an irrigation conduit of a paddy field according to the present invention.
Water is supplied to a paddy field by being pumped from a river serving as a water source through a pumping station through an irrigation conduit 1 buried underground and discharged from a water outlet of the conduit 1 facing the ground. A water supply valve with a holding electromagnetic function (hereinafter, referred to as a water supply valve) 2 is formed near a water outlet of the pipe irrigation water channel 1.

Reference numeral 3 denotes a control box. The control box 3 forms a part of the water supply valve 2 and controls a holding solenoid valve portion 26 for controlling valve opening / closing operation, a battery 4, a power switch 5, a control member 52, and a motor. 6, toggle switch 5
1 and a pressure switch 7.

[0008] The pressure switch 7 is connected to an air trap 8 protruding into the paddy field via a tube 9 extending from the upper part of the air trap 8. The air trap 8 is an air intake container for selecting a change in the water level in the paddy field as a change in air pressure. When the air trap 8 is inserted into the paddy field, the water inlet 81 is not buried in the soil. The tube 9 guides the internal pressure of the air trap 8 to the pressure switch 7. In the lines L and H on the outer periphery of the air trap 8, L indicates a predetermined low water position and H indicates a predetermined high water position.

When the pressure switch 7 senses the pressure value at the water level at which the air trap 8 reaches the L line and the H line, it determines that the air pressure has reached the predetermined low pressure and high pressure, and operates the switch. The pressure switch 7 includes a battery 4, a motor 6,
Then, the wiring is connected to the electric circuit 10 of the holding type electromagnetic valve section 26 (see FIG. 3). The pressure switch 7 switches the circuit between the battery 4 and the motor 6 to rotate forward or backward by operating the switch, and opens or closes the circuit between the battery 4 and the holding solenoid valve 26 of the water supply valve 2. The electric circuit (10) is switched so as to perform the operation.

The toggle switch 51 is turned on and off by a control member 52 driven by the motor 6.

The toggle switch 51 is connected to the electric circuit 10 by wiring (see FIG. 3). The toggle switch 51 changes the circuit configuration so as to stop the motor 6 by operating the switch and to reverse the motor 6 in preparation for the next operation, and to open or close the holding type electromagnetic valve portion 26 of the water supply valve 2. In preparation for the next operation, the operation state is changed and the circuit configuration is changed so that the opening and closing operations are reversed, and the operation waits.

The battery 4 includes a motor 6 and a holding solenoid valve 26.
As a principle, a small and easy-to-handle dry battery is used as a power source for driving the battery, but a solar-rechargeable storage battery may be used.

The power switch 5 is an original switch for switching the automatic water supply control device according to the present invention between an operating state and a non-operating state by an on / off operation.

The holding type electromagnetic valve section 26 activates the opening / closing operation of the diaphragm valve 20 forming the water supply valve 2 by the switch operation of the pressure switch 7 and opens or closes even if the power supply is stopped by the holding action. Is provided. A latch type or a detent type may be used as a type for performing the holding function of the holding type electromagnetic valve portion 26. In the present embodiment, a latch type is used.

The electric circuit 10 shown in FIG. 3 switches between the power supply to the holding type electromagnetic valve portion 26 and the power supply stop, and also switches the open / close operation by changing the circuit configuration (changing the electric polarity + and-). The pressure switch 7, the toggle switch 52, and the control member 52 are combined so that the motor 6 is switched between start and stop and the circuit configuration is switched between normal rotation and reverse rotation.

The water supply valve 2 shown in FIG. 4 is a valve device for switching the irrigation water supply conduit 1 between a water supply state and a water supply stop state, and receives a signal of an operation signal pressure and operates a diaphragm valve 20 for operating the opening degree of the valve. Is adopted. In the present embodiment, the diaphragm valve 20 is used as a main valve of the water supply valve 2, and the holding type electromagnetic valve portion 26 that performs an operation switching function of the main valve is configured differently. The holding type electromagnetic valve section 26 is for controlling the operation signal pressure for operating the diaphragm a operation of the diaphragm valve 20, and is performed by switching the signal pressure control flow path 21.

The signal pressure control flow path 21 is connected to the diaphragm valve 2
An introduction flow path 27 that connects the holding type electromagnetic valve part 26 with the irrigation water conduit 1 on the water source side from the position 0 as a water supply position, a discharge flow path 28 that discharges from the holding type electromagnetic valve part 26 to the atmosphere, It comprises a signal pressure passage 29 connecting the electromagnetic valve section 26 and the diaphragm valve 20.

In this embodiment, the holding type solenoid valve 26 is
Although it has a configuration as a single valve device having a solenoid 26a having a holding function by a latch and a spring return, the holding type electromagnetic valve portion 26 may be integrally attached to the diaphragm valve 20.

The signal pressure control flow path 21 flows from the introduction flow path 27 to the signal pressure flow path 29 by the driving of the holding function solenoid 26a, and reversely flows through the signal pressure flow path 29 to the discharge flow path 28. It can be switched to the flowing channel. Once the flow path is switched, the opening or closing operation is held until the next switch operation by the holding action.

The diaphragm valve 20 is configured so that the valve seat a faces the irrigation conduit 1, and the valve d is moved to and away from the valve seat a by a valve rod c interlocking with the displacement of the diaphragm b.

The diaphragm b has a force obtained by adding a reaction force of a spring e to a force corresponding to a product of an operation signal pressure transmitted from the signal pressure control flow path 21 and an effective area of the diaphragm b, and a pipe irrigation waterway 1. Since the force applied to the valve d, which receives the force corresponding to the product of the cross-sectional area and the water pressure, maintains a position where the force is balanced, when the operation signal pressure applied to the diaphragm b decreases, the valve d gradually opens the water passage 1 and the operation signal pressure Rises, the diaphragm a is displaced so that the valve d gradually closes the water channel 1. In addition,
The opening or closing operation of the diaphragm valve 20 is held until the next switch operation by the holding action of the holding type electromagnetic valve portion 26.

The motor 6 is a DC motor and is connected to a self-locking worm speed reducer. The control member 52 is driven by the motor 6. In this embodiment, the control member 52 performs a turning motion, but the control member 52 may switch the torque switch 51 by a linear motion.

The operation of the above-described apparatus of the present invention will be described below. FIGS. 2A and 2B are explanatory diagrams of the operation of the air trap and the pressure switch. (A) shows a state in which the water surface level is low, and the water level drops and the air 8a sealed in the air trap 8 has a low pressure Pl as indicated by an arrow. Then, the force of the spring 72 overcomes the force of pushing up the diaphragm 71 to lower the diaphragm 71 and close the lower contact 74.

(B) shows a state where the water level is high. If the water level rises by a distance R, the air 8a compressed as shown by the arrow becomes a pressure Ph higher than the aforementioned Pl. Then, the force for pushing up the diaphragm 71 increases, pushing up the diaphragm 71, compressing the spring 72, and as a result, closing the lower contact 73. The distance R is a reset distance, for example, 100 mm.

FIGS. 3A and 3B are circuit diagrams for controlling the operation of the motor and the solenoid. The power switch 5 is turned on, and the electric circuit 10 is turned on. In (a), when the pressure switch 7 is switched to the L side based on the low water level, the polarity of the electric circuit 10 is switched between + and-and energized, and the motor 6 starts rotating clockwise and has a holding function. The solenoid 26a switches the flow path of the holding solenoid valve 26 so that the water supply valve 2 switches to the closing operation (from (b) to (a) in FIG. 4). At the end of rotation of the motor 6, the control member 52 switches the toggle switch 51. In (b), when the toggle switch 51 is switched (arrow), the power supply to the motor 6 and the holding function solenoid 26 is interrupted, the motor 6 is stopped, and the holding function solenoid 26a is turned on by the water supply valve 2. The opening action ((a) in FIG. 4) is continued to maintain the flow path of the holding solenoid valve 26 by exerting a holding action. In (c), when the pressure switch 7 is switched to the H side based on the high water level (arrow), the polarity of the electric circuit 10 is switched between + and-and the power is supplied, and the motor 6 starts rotating counterclockwise. The holding function solenoid 26a switches the flow path of the holding solenoid valve 26 so that the water supply valve 2 switches from the opening operation to the closing operation (from (a) to (b) in FIG. 4). At the end of rotation of the motor 6, the control member 5
2 switches the toggle switch 51. In (d), the toggle switch 51 is switched (arrow).
As a result, the power supply to the motor 6 and the solenoid with holding function 26a is interrupted, the motor 6 is stopped, and the solenoid with holding function 26a is held so that the water supply valve 2 continues the closing operation ((b) in FIG. 4). By exerting the action, the flow path of the holding solenoid valve 26 is maintained. As described above, the rotation direction of the motor 6 and the operation direction of the solenoid 26a with a holding function are determined only by the combination of the pressure switch, the control member, and the toggle switch without using an expensive memory.

FIGS. 4 (a) and 4 (b) are views for explaining the operation of switching the water supply valve between the water supply state and the water supply stop state.
(A) shows a water supply state, and when the water surface reaches a low water level,
The water supply valve 2 is opened by switching the flow path of the holding solenoid valve 26, and the irrigation water conduit 1 starts water supply.

In this embodiment, the signal pressure control valve 26 cuts off the communication between the introduction flow path 27 and the signal pressure flow path 29 by the operation of the solenoid 26a having the holding function, and the signal pressure flow path 29 and the discharge flow path. 28 so as to communicate with each other. By this switching, the pressing force of the diaphragm a closing the valve d is not transmitted to the diaphragm a due to the closing of the introduction flow path 27, and conversely, the force that the valve d continues to receive from the pipe irrigation water channel 1 is reduced. By compressing the spring e to push up the diaphragm a, the water contained in the upper part of the diaphragm chamber f is caused to flow back through the signal pressure flow path 29, and the signal pressure control valve 2
The water is discharged from the discharge channel 28 to the paddy field through the passage 6. The diaphragm a is pushed up by the decrease of the operation signal pressure, and the valve d at the lower portion of the valve rod c is separated from the valve seat a and the valve is opened in conjunction with the upward displacement, and the pipe irrigation water channel 1 supplies water. Start.

(B) shows a water supply stop state. When the water level reaches the high water level, the water supply valve 2 is closed by switching the flow path of the holding solenoid valve 26, and the irrigation water supply conduit 1 starts to stop water supply.

In the present embodiment, the signal pressure control valve 26 cuts off the communication between the signal pressure flow path 29 and the discharge flow path 28 by the operation of the solenoid 26a having a holding function, and the signal pressure flow path 29
Is switched so as to communicate with the water guide channel 27. By this switching, a part of the water in the irrigation conduit 1 flows from the introduction flow path 27 to the signal pressure flow path 29 through the signal pressure control valve 26 and enters the diaphragm chamber f as an operation signal pressure source. The diaphragm a and the valve d receive the water pressure of the irrigation conduit 1 at the same time, but since the effective area of the diaphragm a is larger than the cross-sectional area of the irrigation conduit 1 received by the valve d, the force for pushing down the diaphragm a wins. As a result, the diaphragm a is displaced downward. In conjunction with this downward displacement, the valve d at the lower part of the valve rod c abuts on the valve seat a, the valve is closed, and the irrigation conduit 1 stops supplying water.

In the operation of the present invention, automatic water supply and automatic water supply stop are performed each time the water level of the paddy field repeatedly changes between a predetermined high water level and a low water level.

In a general paddy field, the time required for the water level to drop by 100 mm is 3 to 4 days. On the other hand, the time during which the motor 6 rotates is 3 to 4 seconds. Compared to the case where the memory and the relay are always energized, the present invention energizes for about 2 seconds per day and turns off the power for the remaining time, so that the battery consumption is extremely low. Therefore, when the battery 4 is a commercially available dry battery, it can be used for one year even if natural discharge is expected.

[0032]

As a result of the present invention, the following effects are exhibited by the above configuration. Claim 1 changes the circuit configuration so that the control member driven by the motor is turned on and off by the control member to stop the motor and to reverse the motor in preparation for the next operation, and to open or close the water supply valve. A toggle switch that changes the circuit configuration to open and reverse the water supply valve in preparation for the next operation with the operation held, and a pressure switch that changes the circuit so that the motor switches between normal and reverse rotation and the water supply valve opens and closes. In the past, in order to identify the direction of rotation or wait for a signal from the sensor, power was always returned to the relay or board, but according to the present invention, current is passed only when necessary, In this case, there is no need to supply power to the device at all, so that the power supply can be used for a long time.

Further, in the present invention, when the monitor pressure reaches a predetermined high or low pressure, the circuit of the power supply and the motor is switched so as to rotate forward and reverse, and the circuit of the power supply and the water supply valve is opened and closed. Since the pressure switch is configured so as to perform switching, the switch can be used safely even in a place where the electric, electronic switch or mechanical switch cannot be used due to contamination of water supplied from the irrigation conduit.

Further, since the battery can be used as a power source to perform the valve opening / closing function of the water supply valve, the water supply to the irrigation conduit and the water supply stop can be performed even in a paddy field having no power supply equipment.

Since no relay or board is configured for controlling the operation of the motor and the water supply valve with the holding electromagnetic function,
It is possible to prevent malfunctions due to radio interference from nozzles and the like.

[Brief description of the drawings]

FIG. 1 is an overall view of an automatic water supply control device in an irrigation conduit of a paddy field according to the present invention.

FIG. 2 is an operation explanatory view of an air trap and a pressure switch according to the present invention.

FIG. 3 is a circuit diagram according to the present invention.

FIG. 4 is an operation explanatory view of the water supply valve according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Irrigation water conduit 2 Holding type water supply valve with electromagnetic function 4 Battery 51 Toggle switch 52 Control member 6 Motor 7 Pressure switch 8 Air trap 9 Tube 10 Electric circuit

Claims (1)

[Claims] 1. A water supply valve with a holding electromagnetic function (2) which opens and closes so as to switch an irrigation water conduit (1) between a water supply state and a water supply stop state, and an air trap (8) installed in a paddy field.
And a tube (9) for guiding the internal pressure of the air trap (8), and the internal pressure of the air trap (8) is monitored via the tube (9). When the pressure reaches a predetermined high or low pressure, A pressure switch (7) for switching an electric circuit (10) between a battery (4), a motor (6) and a water supply valve with a holding electromagnetic function (2), and a control member (52) driven by the motor (6). The power supply to the motor (6), which is turned on and off by the control member (52), and the feed valve (2) with the holding electromagnetic function is stopped, and the motor (6) is prepared for the next operation.
And a toggle switch (51) for changing the configuration of the electric circuit (10) so that the holding type water supply valve with electromagnetic function (2) operates in a reverse manner, and when the water level in the paddy field drops to a predetermined low level. The water supply valve with holding electromagnetic function (2) is opened to start water supply to the paddy field, and the motor (6)
To turn off the toggle switch (51) to stop the power supply to the motor (6) and the water supply valve with holding electromagnetic function (2), and to maintain the water supply state by the holding action of the water supply valve with holding electromagnetic function (2). When the water level in the paddy field rises to a predetermined high level, the water supply valve with the holding electromagnetic function (2) is started to be closed to stop water supply to the paddy field, and the motor (6) is driven. To switch the toggle switch (51) to stop supplying power to the motor (6) and the water supply valve with holding electromagnetic function (2), and hold the water supply stop state by the holding action of the water supply valve with holding electromagnetic function (2). An automatic water supply control device in an irrigation conduit of a paddy field.