JP2004033204A - System for supplying paddy field with water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To conduct automatic water supply to a paddy field in a paddy region where commercial electric power is not available, so that operations for filling the field with water and for patrolling to monitor the water thereafter are saved. <P>SOLUTION: A water source P and the paddy field G are connected to each other by a water pipe 30 equipped with a water pump 20, and then the water pump 20 is operated by electric power generated by a photovoltaic power generating panel 10, so as to keep a water level of the paddy field G constant based on a detected signal which is given by a level sensor for detecting a water level L2 of the paddy field G. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a paddy field water supply system that can automatically fill a paddy field in a growing season of rice without using wiring or the like from a power transmission line by using a photovoltaic panel.
[0002]
[Prior art]
A waterway is usually provided near the paddy field, and the tributaries of the waterway and the paddy field are separated by ridges. In addition, floodgates and weirs are installed at regular intervals in the main stream and tributaries of the irrigation canal, and the paddy fields surrounding the rice fields in a square frame form have paddy fields at two places, high and low. There is provided a weir for taking in water and a weir for discharging water in the paddy field. Sluice gates in the main irrigation canal are used to adjust the water level of a plurality of tributaries, and weirs in each tributary are used to adjust the water level of individual tributaries.
[0003]
To fill the paddy field, use a weir in a tributary of the irrigation canal near the paddy field to block an appropriate amount of flowing water and raise the water level, and cut off the weir on the high side of the ridge to increase the water level in the irrigation canal. Through the furrow weir and into the paddy field. As a result, when the water level of the paddy field reaches a necessary level, the weir of the ridge is closed and the weir of the irrigation canal tributary is returned to its original state. Then, such a water filling operation is periodically repeated every time the water level of the paddy field decreases over a long period of time from after the rice planting to before the harvest season.
[0004]
[Problems to be solved by the invention]
For rice farmers, the time of rice planting and harvesting is a busy season during the busy season, but it is a relatively easy time to relax, but during that time monitoring the water level of the rice fields, so-called water watching, must be done. For this reason, there is a problem that it is not possible to take a vacation such as traveling abroad, such as leaving the house for a long time. With the development of various automatic control technologies, it may seem that such a problem can be easily solved by automatically filling the water with a pump. Even if a transmission line is installed along a road, it does not mean that electricity can be extracted from any part of the transmission line, and many paddy fields also face large agricultural roads. Power supply for pumps and control equipment cannot be obtained. In addition, even if it is not impossible to use an engine pump that uses an internal combustion engine and it is not impossible to automatically drive the engine pump, it is too expensive and dangerous for agricultural use.
[0005]
The present invention focuses on the fact that photovoltaic panels for various applications have come to be provided at a low price, and by using this as a power source, it is possible to automatically fill a paddy field, thereby enabling irrigation canals and the like. An object of the present invention is to provide a paddy water supply system that can omit a troublesome water filling operation for operating a weir of a ridge, and can eliminate the need for a work of watching the water after filling.
[0006]
[Means for Solving the Problems]
As a means for achieving this object, the present invention employs the following configuration.
[0007]
A configuration corresponding to claim 1 of the paddy water supply system according to the present invention includes a solar power generation panel, a water pump powered by the solar power generation panel, and a water supply connected to the water pump for communicating a water source with the paddy field. A water source is automatically supplied to the paddy field via a water supply pipe by a water pump under the condition of sunlight on the solar power generation panel.
[0008]
According to this configuration, if a predetermined amount of sunshine is obtained from dawn to sunset, the water pump is driven by the solar power generation panel performing a predetermined power generation action, and the water pump automatically supplies water from the water source. Is supplied to paddy fields.
[0009]
A configuration corresponding to claim 2 of the paddy water supply system according to the present invention is such that the output voltage of the solar panel drives the drive motor of the water pump in a wiring system for electrically connecting the solar panel and the water pump. And a circuit breaker for electrically connecting the photovoltaic panel and the water pump on condition that the appropriate voltage level is exceeded.
[0010]
According to this configuration, when the output voltage of the photovoltaic panel does not rise to a voltage level appropriate for starting the drive motor of the water pump due to factors such as weather and time, the breaker breaks the photovoltaic panel. Since the water pump is not electrically connected, it is possible to prevent a burn-out accident of the drive motor due to a voltage lower than a voltage required for starting the drive motor being applied to the drive motor for a long time.
[0011]
A paddy water supply system according to a third aspect of the present invention includes a plurality of water pumps, and a plurality of water pumps are connected in series to supply water.
[0012]
According to this configuration, even when the difference between the water level of the water source and the water level of the paddy field exceeds the water pumping capacity of one water pump, the plurality of water pumps are connected in series, so that the entire pumping is performed. Since the water can be sent by increasing the capacity, the number of water pumps to be connected can be adjusted according to the height of the head between the water source and the paddy field, and water can be supplied to the paddy field while suppressing unnecessary power consumption.
[0013]
A configuration corresponding to claim 4 of the paddy water supply system according to the present invention includes a level sensor for detecting a water level of the paddy field, and operates the water pump so as to keep the water level of the paddy field constant by a detection signal of the level sensor. It is characterized by the following.
[0014]
According to this configuration, the water pump is automatically operated when the water level of the paddy field decreases, and the water pump stops when the water level level of the paddy field increases, so that the height of the weir on the discharge side of the ridge is adjusted. The operation can be omitted, the useless operation of the water pump can be suppressed, and the service life of the water pump can be extended.
[0015]
A configuration corresponding to claim 5 of the paddy water supply system according to the present invention includes a level sensor that detects a water level of a water source, and a detection signal of the level sensor indicates that the water level of the water source exceeds a predetermined water level. It is characterized in that the water pump is operated under the conditions.
[0016]
According to this configuration, when the water level of the water source falls below the predetermined water source level, the water pump stops, so that it is possible to prevent the water pump from burning due to the suction of air by the water pump.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
The paddy water supply system is mainly composed of a photovoltaic power generation panel 10, a water pump 20 using the photovoltaic power generation panel 10 as a power source, and a water supply pipe 30 connecting the water source P and the paddy field G. The water pump 20 is electrically connected to the water pump 20 via a wiring system 40 (FIG. 1).
[0019]
The paddy field G illustrated in FIG. 1 as a use environment of the paddy water supply system is surrounded on all sides by soil-coated ridges G1, G1,..., And the ridges G1, G1,. Is provided. The weir plate G3 of the weir G2 plays a role in regulating the water level L2 of the paddy field G, and the water level L2 of the paddy field G does not exceed the height of the weir plate G3 at most. Further, a water channel for use as a water source P runs on the side of the paddy field G. The irrigation canal is generally provided at a position lower than the paddy field G, and a head H1 exists between the top of the ridge G1 and the water source P in the maximum case.
[0020]
The photovoltaic power generation panel 10 can be easily carried with a small panel having a vertical and horizontal dimension of 0.5 m or less and a generation voltage of 12 V. The panel 11 is attached to a frame 12, and the frame 12 can be tiltably connected to an attached support 13 via a knob screw 12j. A hose clamp 14 is attached to the support 13. The photovoltaic power generation panel 10 can be installed by directly driving the pillar-shaped support 13 into the ridge G1 or the like, or by inserting it into an appropriate pilot hole. At this time, it is preferable that the panel 11 is adjusted to an elevation angle of about 30 degrees toward the south.
[0021]
The water pump 20 is a screw-type small pump of 12V specification that does not involve pulsation in the water supply operation (FIG. 2). The water pump 20 includes a drive motor 21 and a cylinder part 22, and a pinion 21 g is attached to an output shaft 21 a of the drive motor 21. A pair of bearing plates 23, 23 that are separately arranged on the left and right sides, are fitted into the cylinder portion 22. The pair of bearing plates 23, 23 are provided with bearings 23b, 23b at the center positions, respectively, and support the shaft 24 to which the two-stage screws 25, 25 are attached. A gear 24g that meshes with the pinion 21g of the drive motor 21 is attached to one end of the shaft 24. That is, when the drive motor 21 is driven, the shaft 24 with the screws 25 is rotated via the pinion 21g and the gear 24g.
[0022]
The pair of bearing plates 23, 23 and the gear 24g are provided with water holes h1, h1... And water holes h2, h2. Further, at both ends of the cylinder portion 22, a suction port 22A and a discharge port 22B, both serving as hose joints, are provided. Therefore, when the shaft 24 is driven to rotate, water is sucked from the suction port 22A, and the sucked water is passed through the water holes h2, h2... Of the gear 24g and the water holes h1 of the pair of bearing plates 23, 23. , H1... Are discharged from the discharge port 22B side. At this time, a mesh strainer 26 is detachably attached to the suction port 22A side to prevent large debris from being sucked into the water pump 20 (FIGS. 1 and 1). 2). The water supply pipe 30 connected to the suction port 22A or the discharge port 22B can be freely selected from commercially available ones.
[0023]
A circuit breaker 41 can be interposed as needed in the electric system 40 connecting the solar power panel 10 and the water pump 20 (FIG. 3). The circuit breaker 41 includes an electromagnetic relay R3 of a type in which a normally open contact is closed by a drive coil E, and a pair of voltage dividing resistors R1 and R2. The electromagnetic relay R3 drives the solar panel 10 and the water pump 20. It is interposed in series in a wiring system 40 between the motor 21. The voltage dividing resistors R1 and R2 are interposed in parallel with the wiring system 40, divide the voltage from the photovoltaic power generation panel 20, and apply a part of the voltage to the drive coil E of the electromagnetic relay R3. I have. Therefore, the solar panel 10 and the drive motor 21 are electrically disconnected during a period in which the divided voltage component of the generated voltage of the solar panel 10 does not exceed the operation sensitivity of the electromagnetic relay R3. This is because the voltage is continuously applied to the drive motor 21 during a period in which the generated voltage of the photovoltaic power generation panel 10 is lower than the voltage required for the drive motor 21 to rise due to cloudy weather or the like. The purpose of this is to prevent seizures from burning.
[0024]
The paddy field water supply system according to such a configuration installs the photovoltaic power generation panel 10 at an appropriate place that does not hinder the agricultural work, and inputs the water pump 20 connected with the water supply pipe 30 to the water source P, and With the simple preparation of the other end supported on the paddy field G by the hose clamp 14 of the column 13, the rice field G can be automatically supplied to the paddy field G for a long time before the harvesting season after planting the rice seedlings. In the meantime, a great deal of labor involved in water management of the paddy field G can be omitted (FIG. 1). The paddy field water supply system in this embodiment operates as long as there is a predetermined amount of sunshine even if the water level L2 of the paddy field G reaches a necessary level. However, excess water is discharged from the ridge G1. Since the rice seedlings flow out over the weir G2, there is no inconvenience that the rice seedlings are submerged.
[0025]
As another embodiment, the paddy field water supply system includes one or both of a level sensor 42B that detects a water level L2 of the paddy field G and a level sensor 42A that detects and detects a water level L1 of the water source P. (FIG. 4).
[0026]
Each of the level sensors 42A and 42B is composed of a combination of a floatless liquid level relay and three detection electrodes b, b,..., For example, suspended from a rod B inserted into a ridge G1 and placed on a paddy field G or a water source P. The water level L1, L2 can be detected by the number of the detection electrodes b, b,. The level sensors 42A and 42B are both provided in parallel to a wiring system 40 that connects the solar power generation panel 10 and the water pump 20, and outputs thereof, that is, detection signals S1 and S2 are transmitted via an AND gate 43. The voltage is input to the voltage dividing resistors R1 and R2 of the circuit breaker 41. At this time, the conditions set by the level sensor 42A, the level sensor 42B, and the AND gate 43 are such that the water level P1 of the water source P is equal to or higher than a certain level, and the water level L2 of the paddy field G is a certain level. It is below the water level.
[0027]
Therefore, in the paddy field water supply system of this embodiment, the water pump 20 automatically stops when the water level L2 of the paddy field G rises, and the water pump 20 starts when the water level L2 drops, and as a result, Since the water level of G is kept within a certain range, the work of managing the weir G2 for draining the ridge G1 can be omitted. Further, when the water level L1 of the water source P falls below a certain level, the water pump 20 automatically stops, and burnout of the drive motor 21 is reliably prevented.
[0028]
Further, the paddy water supply system may include a plurality of water pumps 20, 20 connected in series to supply water (FIG. 5). Accordingly, it is possible to cope with a case where there is a head H1 exceeding the water pumping capacity of one water pump 20 between the paddy field G and the water source P, or a case where a long distance water supply is required. Further, in this case, when the power generation capacity of the photovoltaic power generation panel 10 is insufficient, a plurality of photovoltaic power generation panels 10 and 10 can be connected and used.
[0029]
The plurality of water pumps 20, 20 can be easily connected to each other by the water supply pipes 30, 30 with the discharge port 22B and the suction port 22A facing each other. In this case, since the water pump 20 is of a screw type that does not involve a pulsating flow, the performance of the water pumps 20 and 20 can be increased without performing phase adjustment. The number of solar panels 10 can be increased by interposing diodes D1 and D1 for backflow prevention. Therefore, the user can fill the paddy field G with minimum cost according to the head H1 and the distance between the paddy field G and the water source P.
[0030]
【The invention's effect】
The paddy water supply system according to the present invention operates a water pump using a photovoltaic power generation panel as a power supply to supply water from a water source to the rice paddies, so that a predetermined amount of sunlight can be obtained even in paddy fields where commercial power cannot be used. As long as possible, automatic water supply to paddy fields is possible, and therefore, it is not necessary to omit complicated water filling work, including contents of dams and irrigation of irrigation canals and return to their original state, and to watch the water thereafter. Is very practical.
[Brief description of the drawings]
FIG. 1 is a side view of a use state showing an embodiment of the present invention.
FIG. 2 is a sectional view of the water pump according to the embodiment of the present invention.
FIG. 3 is a circuit diagram of a wiring system according to the embodiment of the present invention.
FIG. 4 is a circuit diagram of a wiring system showing another embodiment of the present invention.
FIG. 5 is an overall configuration diagram of a use state showing another embodiment of the present invention.
[Explanation of symbols]
P Water source G Paddy field L1 Water level L2 Water level S1 Detection signal S2 Detection signal 10 Solar power panel 20 Water pump 30 Water supply pipe 40 Wiring system 41 Circuit breaker 42A Level sensor 42B Level sensor

Claims (5)

A photovoltaic panel, a water pump powered by the photovoltaic panel, and a water pipe connected to the water pump and communicating between a water source and a paddy field;
A paddy field water supply system, wherein water from a water source is automatically supplied to a paddy field by the water pump through the water supply pipe under a condition of sunshine on the solar power generation panel. In a wiring system for electrically connecting the solar power panel and the water pump, the solar light is output on the condition that an output voltage of the solar power panel exceeds a voltage level suitable for driving a drive motor of the water pump. The paddy water supply system according to claim 1, further comprising a circuit breaker for electrically connecting a power generation panel and the water pump. 3. The paddy water supply system according to claim 1, wherein the water supply system includes a plurality of water pumps, and the plurality of water pumps are connected in series to supply water. 4. 4. The water pump according to claim 1, further comprising a level sensor for detecting a water level of the paddy field, wherein the water pump is operated so as to keep the water level of the paddy field constant according to a detection signal of the level sensor. Paddy water supply system as described. The water pump according to claim 1, further comprising a level sensor for detecting a water level of the water source, wherein the water pump is operated on condition that a water level of the water source exceeds a predetermined water level by a detection signal of the level sensor. The paddy water supply system according to claim 4.

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