JPH08280276A - Water feeder for paddy field - Google Patents

Abstract

PURPOSE: To provide a water feeder for a paddy field, comprising a water level sensor, etc., arranged in machine frame and capable of electrically sensing the water level of the paddy field and simplifying the structure, and compacting the water feeder, readily installed and improved in operating efficiency. CONSTITUTION: This water feeder for a paddy field is constituted of a water level sensor 3, arranged in a machine frame 2 and capable of electrically sensing the water level of the paddy field 1, a controlling part 4 capable of performing the comparison processing of the present water level outputted from the water level sensor 3 with the set one and a water feeding part 5 capable of carrying out the automatic feed and stop of water according to the processing contents outputted from the controlling part 4. Furthermore, the controlling part 4 is connected to, equipped with a timer and constituted so as to control the operating time of the water level sensor 3 and water feeding part 5, which si located oppositely to an upward directing water feeding port 10-1 of a water feeding canal 10, arranged and introduced from a water source 9 into the machine frame 2 and preferably constituted of a valve disc 5-1 supported by a supporting shaft 11, arranged on the shaft center line of the water feeding port 10-1 and a supporting part 5-2, screwed and supporting the supporting shaft 11 so as to enable the free vertical movement and a motor 5-3 for normally and reversibly rotating the supporting part 5-2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paddy field water supply apparatus for automatically supplying water to a paddy field and stopping the water supply when the water level reaches a preset water level to control the water level of the paddy field. It is.

[0002]

2. Description of the Related Art Conventionally, the water level management of a paddy field is disclosed in, for example, Japanese Patent Laid-Open No. 6-280243 and Japanese Patent Laid-Open No. 7-23671. When the water level reaches, the water supply system is installed in the paddy field so that the water supply is stopped. However, the conventional water supply system consists of a water level detector that detects the upper and lower limits of the water level, and a water supply unit that automatically controls and stops water by controlling the lower and upper limits of the water level detected by this water level detector. I managed to control the water level in the paddy field.

[0003]

However, the conventional water supply device detects the water level of the paddy field by the float floating on the water surface, and moves the auxiliary valve for opening and closing the main valve of the water supply part by the vertical movement of the float. Since the structure is to supply and stop water to the paddy field, the structure is complicated and the manufacturing is troublesome. For example, in the case of the water supply device disclosed in Japanese Unexamined Patent Publication No. 6-280243, an auxiliary valve of an opening / closing starter that opens / closes the main valve of the water supply unit according to the change of the water level (in the specification, the atmosphere release valve). Is attached to a float guide that is connected via an arm to a float that floats on the water surface, and the auxiliary valve is opened and closed by the vertical movement due to the change in the water level of the float. Open (separate) the main valve located opposite the opening of the passage from the opening.
The valve is closed (seated) to supply and stop water.
Therefore, in the conventional device, an opening / closing starter having an auxiliary valve that opens and closes according to the movement of the float and a water supply unit having a main valve that opens and closes due to a change in pressure due to the opening and closing operation of the auxiliary valve are individually produced, and then the water supply unit is opened and closed. Since the troublesome assembly such as the connection of the starting portion through the communication introduction pipe is required, the productivity is poor and the production cost is increased. In particular, JP-A-7-23671
In the water supply device disclosed in the publication, an opening / closing starter equipped with a float is connected to a water supply part having a main valve that is connected via a movable lever or the like and opens and closes by following up and down movements of the float. On the other hand, even after installing them individually, the opening / closing starter and the water supply part must be connected via a movable lever, etc., which is troublesome and troublesome in terms of installation. It was a thing.

The present invention has been made in view of such conventional circumstances, and an object of the present invention is to provide a water supply system for paddy fields in which the structure can be greatly simplified and the system can be made compact.

[0005]

The technical means taken by the present invention to achieve the above-mentioned object are a water level detector arranged inside a machine frame and electrically detecting the water level of a paddy field, and this water level detector. The gist is that it is composed of a control unit that performs a comparison process between the current water level output from the control unit and the set water level, and a water supply unit that automatically stops and supplies water according to the processing content output from this control unit. .

Further, in the water supply system for paddy fields according to the first aspect of the present invention, the water supply section is located opposite to the upward water supply port of the water supply channel introduced from the water source into the machine frame, and is vertically movable above the water supply port. A valve valve held by a supported support shaft, a support part rotatably disposed above the water supply port, and a support part that screw-supports the support shaft in a penetrating manner, and a side part of the support part,
The motor is connected to the control unit, and the motor is connected to the control unit, and the motor is rotated in the normal or reverse direction according to the processing content output from the control unit to raise the support shaft via the support unit. The gist is that the water supply port of the water supply passage is opened and closed by lowering it and using a valve valve.

Further, in the water supply system for paddy fields according to claim 1, the water supply section is provided with a partition wall for partitioning the upstream side and the downstream side into a water supply passage introduced from the water source into the machine frame, and the upper part of the partition wall. Is constructed with a valve closing pressure chamber having a flow port that connects the upstream side and the downstream side across the partition wall, and a diaphragm is provided at the flow port of the valve closing pressure chamber, and a position facing the diaphragm is provided. A water supply port that is opened / closed by a diaphragm is provided in the lower part including the upper end of the partition wall, and is also provided at an inflow port leading from the upstream side of the water supply passage to the valve closed pressure chamber, and the valve closed pressure chamber is further closed. From the outside to the atmosphere release outlet provided with a solenoid valve at the outlet,
The solenoid valve is connected to the control unit, and the atmosphere release outlet that is released from the valve pressure chamber to the outside is opened / closed by the processing content output from the control unit, and the water supply port is opened / closed by the diaphragm. The point is that it is configured to do

Further, in the water supply system for paddy fields according to any one of claims 1 to 3, a timer is connected to the control unit to control the operation time of the water level detector and the water supply unit. Use as a summary.

[0009]

According to the above-mentioned technical means of the present invention, the water level in the paddy field is electrically detected by the water level detector, and the detected current water level information is output to the control unit. Then, the control unit performs a comparison process with the set water level.
When the control unit determines that the current water level output from the water level detector is lower than the set water level, the control unit outputs a water supply signal (valve open signal) to the water supply unit, and the water supply unit starts automatic water supply. When the current water level that rises with water supply reaches the set water level, the control unit outputs a stop signal (valve closing signal) to the water supply unit to stop water supply.

According to the technical means of claim 2, claim 1
When the control unit determines that the current water level sent from the water level detector is lower than the set water level, the control unit outputs a water supply signal to the motor, and the motor rotates forward or backward in the direction to open the valve valve. The support shaft is raised through the support portion, and the valve valve is disengaged from the water supply port of the water supply passage to start automatic water supply. When the current water level that rises with water supply reaches the set water level, the control unit outputs a stop signal to the motor, which causes the motor to rotate normally or reversely in the direction to close the valve valve and lower the support shaft through the support unit. Then, the valve valve is seated on the water supply port of the water supply passage to stop the water supply.

According to the technical means of claim 3, claim 1
When the control unit determines that the current water level sent from the water level detector is lower than the set water level, the control unit outputs a water supply signal to the solenoid valve, and the solenoid valve releases the atmosphere release port of the valve closing pressure chamber. To do. Then, the water that has stagnated in the valve closing pressure chamber flows out to the outside from the atmosphere release port, and the pressure in the valve closing pressure chamber drops. As a result, the diaphragm that was pushed by the pressure in the valve closing pressure chamber and seated on the water supply port was pushed toward the valve closing pressure chamber side by the water pressure on the upstream side (water source side) of the water supply channel that sandwiches the partition wall. Detach and start automatic water supply. Then, when the current water level that rises with water supply reaches the set water level, the control unit outputs a stop signal to the solenoid valve, and the solenoid valve shuts off the atmosphere opening port. Then, the pressure in the valve closing pressure chamber rises due to the water flowing in from the inflow port. As a result, the diaphragm is pushed to sit on the water supply port, and the water supply is stopped.

According to the technical means of claim 4, since the operating time of the water level detector and the water supply section is controlled by the timer, it is not necessary to constantly energize them. That is, it consumes less electric power and is economical as compared with the case of always energizing.

[0013]

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a water supply system for a paddy field according to claims 1 and 2, and a machine frame 2 installed on the paddy field of a paddy field 1 A water level detector 3 which is disposed inside and electrically detects the water level L of the paddy field 1, and a control unit 4 which performs a comparison process between the current water level output from this water level detector 3 and the set water level, and this control Automatic water supply according to the processing contents output from the unit 4,
When the control unit 4 determines that the current water level output from the water level detector 3 is lower than the set water level, the control unit 4 causes the motor 5 to be described later of the water supply unit 5 to stop. A water supply signal (valve open signal) is output to 3, and the water supply unit 5 starts automatic water supply. Then, when the current water level that rises with water supply reaches the set water level, the control unit 4 outputs a stop signal (valve closing signal) to the motor 5-3 to stop the water supply.

The water level detector 3 is a pressure sensor that converts the pressure that changes according to the vertical displacement of the water level L into a voltage and outputs the water level L to the control unit 4, and is located inside the machine casing 2. It is arranged vertically and the processing section 4 of the control section 4 described later 4-
It is connected to 1 (see the block diagram of FIG. 2) and is configured to output the detected water level information to the processing unit 4-1. In the figure, inflow vertical holes 6-1 through which water from the paddy field 1 enters on the peripheral surface are opened at appropriate intervals at several points in the circumferential direction, and the lower end side is vertically installed in the machine frame 2 so that it is inserted in the paddy field. The water level L of the paddy field 1 can be accurately detected without being affected by the waves generated on the water surface by the wind or the like so as to be vertically installed inside the tubular body 6.

Reference numeral 7 in the figure denotes a water temperature detector including a well-known water temperature gauge which operates to convert the water temperature of the paddy field 1 into a voltage,
The processing unit of the control unit 4 is arranged in the cylindrical body 6 described above.
It is connected to 4-1 and outputs the detected water temperature information to the processing unit 4-1.

The control unit 4 includes a processing unit 4-1 for comparing the current water level output from the water level detector 3 with the set water level, and when it judges that the current water level is lower than the set water level, the amplifier 4- A water supply signal is output to the water supply unit 5 via 2 and a stop signal is output to the water supply unit 5 when the current water level reaches the set water level. That is, it serves to manage the water level L of the paddy field 1 at the set water level by comparing the water level L of the paddy field 1 with the current water level output from the water level detector 3 based on the already stored set water level. , Is arranged on the machine frame 2 covered by the cover 8.

Incidentally, in the present embodiment, the difference in water level between the set water level and the current water level is set to ± 2 cm when the current water level and the set water level are compared by the processing section 4-1. For example
Even if the current water level output from the water level detector 3 is 13 cm or 17 cm with respect to the set water level of 15 cm, the processing unit 4-1 compares the set water level and the current water level with the same water level.

The water supply section 5 is a pipeline (not shown) which is being advanced in recent agricultural land development, or a water channel 9 as shown.
Upward water supply port 10 of the water supply channel 10 introduced by piping from the machine frame 2
-1, valve valve 5-1 supported by a support shaft 11 disposed on the axis of the water supply port 10-1 and rotatably disposed above the water supply port 10-1. A support portion 5-2 which supports the support shaft 11 by screwing so as to be vertically movable, and a motor 5-which is disposed on the side of the support portion 5-2 and rotates the support portion 5-2 forward and backward.
The motor 5-3 is connected to the control unit 4, and the motor 5-3 is rotated in the normal or reverse direction according to the processing content output from the control unit 4, and the support shaft 11 is raised via the support unit 5-2. Lower it and open the water supply port 10-1 of the water supply channel 10 with the valve valve 5-1.
It is configured to close the valve.

Support shaft for connecting and supporting the valve valve 5-1 at the lower end
11 is formed to have an appropriate length, is provided with a threaded portion 12 that is screwed into the support portion 5-2 in a penetrating manner, and has a non-rotatable key 13 on the upper end side. 13 is non-rotatably supported by a rotation stopper 14 attached to the upper part of the machine frame 2 on the axis of the upward water supply port 10-1 of the water supply passage 10.

The support portion 5-2 has a screw hole 15 through which the screw portion 12 of the support shaft 11 is screwed and penetrates, and the upward water supply port 10 of the water supply passage 10 is provided.
-1 is arranged so as to be supported by a rotating body 16 such as a bearing between the water supply port 10-1 on the axis of -1 and the rotation stopper 14 described above, and can be rotated normally / reversely by the power from the motor 5-3. To move the support shaft 11 up and down. That is, the water supply port of the water supply channel 10
The valve valve 5-1 for 10-1 is opened and closed.
Further, the supporting portion 5-2 is provided with a large gear 17 so as to be in meshing connection with the motor 5-3.

The motor 5-3 is arranged on the side of the large gear 17 of the supporting portion 5-2 by meshingly connecting the small gear 18 to the large gear 17 of the supporting portion 5-2, and the processing portion 4 via the amplifier 4-2 of the control portion 4. -1, connected to the processing section 4-1 for comparison processing and output by the water supply signal and the stop signal, which are output forward and reverse,
Move the support shaft 11 up and down via 5-2 to move the valve valve 5-1.
Is opened and closed with respect to the water supply port 10-1 of the water supply passage 10.

The water level detector 3, the water temperature detector 7, the control unit 4 and the motor 5-3 of the water supply unit 5 are connected to the lead-in wire 19 drawn from the electric pole shown in the figure, and are connected to the machine frame 2. The connectors 20 are respectively connected to the arranged connectors 20, and electricity is supplied from the connectors 19.

Next, an operation example of the paddy water supply system of the present embodiment constructed as described above will be described with reference to the flow chart shown in FIG. 3. The water level detector 3 detects the water level L of the paddy field 1 (step twenty one). When the detected water level L information is output to the control unit 4, the processing unit 4-1 of the control unit 4 compares the current water level with the set water level when the water level detector 3 outputs the water level information. (Step 22). When it is judged that the current water level is lower than the set water level, a water supply signal (valve open signal) is output from the processing unit 4-1 to the motor 5-1 of the water supply unit 5 via the amplifier 4-2, and the motor 5-3 is positive. Operate in the rotating or reverse direction to raise the valve valve 5-1 and
The water supply port 10-1 is detached, the water supply port 10 is opened, and automatic water supply is started (step 23). At this time, the water level detector 3 continuously detects the rise of the water level L accompanying the water supply (step 2
1), the water level information is sequentially output to the processing unit 4-1, and the processing unit 4-1 sequentially performs the comparison process with the set water level (step 2).
2). When the current water level reaches the set water level, the processing unit 4-1 outputs a stop signal (valve close signal) to the motor 5-3,
Operate the motor 5-3 in the reverse or forward direction to lower the valve valve 5-1 and seat it on the water inlet 10-1 of the water supply passage 10.
The water supply port 10-1 is closed to stop the water supply (step 24).

4 to 6 show a water supply system for a paddy field according to a fourth aspect of the present invention, in which the water level detector 3, the water temperature detector 7, the motor 5-3 of the water supply unit 4 are energized by power on the machine casing 2. In order to reduce the power consumption of the battery 27 of limited power, the water level detector 3, the water temperature detector 7, and the motor 5-3 of the water supply unit 5 are connected to the motor 5-3. A timer 28 that manages the energization time of the power source of the power source is placed on the machine casing 2, and the water level detector 3, the water temperature detector 7, and the motor 5-1 of the water supply unit 5 have a battery at the energization time set by the timer 28. Power is supplied from 27 so that they can operate. For example, it is operated twice a day at around 8:00 am and around 4:00 pm, and the water level detector 3 detects the water level L and outputs the water level information to the control unit 4 during the energization time twice a day. It will be configured. That is, only when the battery 27 controlled by the timer 28 is energized, the control unit 4 causes the processing unit 4-1 to compare the current water level output from the water level detector 3 with the set water level, and the water supply unit 5 The water supply signal and the stop signal are output to the motor 5-3, and the valve valve 5-1 for the water supply port 10-1 of the water supply passage 10 is opened / closed to manage the water level L of the paddy field 1 at the set water level. It is configured (see the block diagram of FIG. 5). Incidentally, in such an embodiment, the same reference numerals are used for the same components as those in the detailed description of the above embodiment, and the description thereof will be omitted.

The timer 28, which controls the energization of the power source from the battery 27 to the water level detector 3, the water temperature detector 7, and the motor 5-3 of the water supply section 5, is arranged on the machine frame 2,
The battery 27 is connected to the water level detector 3, the water temperature detector 7, and the motor 5-3 of the water supply unit 5. The water level detector 3 and the water temperature detector 7 are connected via the processing unit 4-1 of the control unit 4, and the water supply unit 5 is connected to the motor 5-3.
Via the amplifier 4-2 (see the block diagram of FIG. 5).
Also, the ON operation to energize the power of the timer 28 is performed by counting the set time, but the power is turned OFF.
The operation is performed by the power cutoff signal output from the control unit 4. That is, the processing unit 4-1 of the control unit 4 compares the current water level from the water level detector 3 with the same water level as the set water level and outputs a stop signal (valve closing signal) to the motor 5-3 of the water supply unit 5. , The motor 5-3 is operated and the valve valve
5-1 is performed by the power cutoff signal output from the processing unit 4-1 when the water supply port 10-1 of the water supply passage 10 is closed.

According to the paddy water supply system of this embodiment, the timer 28 is started at the set time as shown in the flow chart of FIG. 6 (step 29). Then
Power is supplied to the water level detector 3, the water temperature detector 7, and the motor 5-3 of the water supply unit 5 (step 30). After that, in the same manner as the steps from step 21 to step 24 described in detail in the flowchart of FIG. 3, automatic water supply to the paddy field 1 and stop of water supply are performed from step 31 to step 34, depending on the set water level of the paddy field 1. Water level is managed. At this time, the processing unit 4-1 of the control unit 4 compares the current water level sequentially output from the water level detector 3 with the water supply with the set water level. When the current water level reaches the set water level, the processing unit 4-1 outputs a stop signal (valve close signal) to the motor 5-3 and at the same time outputs a power-off signal to the timer 28, turning off the timer 28. The battery 27 operates, and the power supply from the battery 27 to the water level detector 3, the water temperature detector 7, and the motor 5-3 of the water supply unit 5 is cut off (step 35).

Further, in this embodiment, as indicated by the chain double-dashed line,
A solar cell module 38 that stores a voltage in the battery 27 by using sunlight is installed on the machine casing 2, and a so-called solar power generation system is used to store a voltage in the battery 27, whereby the battery is stored. The power supply from 27 can be continued for a long time. Needless to say, devices such as a switching device that converts light into electric power are used to connect the solar cell module 38 and the battery 27.

In this embodiment, instead of the valve valve 5-1 by the motor 5-3, the supporting shaft 11 is connected to the illustrated solenoid having a capacity capable of opening and closing the valve valve 5-1. Place it on the supported coaxial line and operate the solenoid by the water supply signal and stop signal output from the control unit 4 to open the valve valve 5-1 to the upward water supply port 10-1 of the water supply port 10. The valve may be configured to be closed, which is free.

FIG. 7 shows an essential part of the water supply system for a paddy field according to claim 3, which is a water supply channel introduced from the water channel 9 into the machine casing 2.
39, a partition wall separating the downstream side 39-1 and the upstream side 39-2
40 is provided, and a valve closing pressure chamber 42 having a flow port 41 that connects the downstream side 39-1 and the upstream side 39-2 across the partition wall 40 is constructed on the upper part of the partition wall 40, Flow port of this valve closing pressure chamber 42
The diaphragm 43 is provided on the 41 and the diaphragm
A water inlet 44, which is located opposite to 43 and includes a top end of the partition wall 40 and a lower portion thereof, which is opened and closed by a diaphragm 43, is provided. Then, an inlet 45 that communicates with the valve closing pressure chamber 42 from the upstream side 39-2 of the water supply passage 39 is provided, and an atmosphere release outlet 46 that goes out from the valve closing pressure chamber 42 to the outside is provided and the outlet 46 is electromagnetically connected. It is equipped with a valve 47. Also in this embodiment, the same reference numerals are used for the same components as those in the detailed description of the above embodiment, and the description thereof will be omitted.

The valve closing pressure chamber 42 is a diaphragm in which the bottom portion 48 of the machine frame 2 straddling the partition wall 40 of the water supply passage 39 and the flow port 41 are arranged.
The diaphragm 43 is fixedly attached around the diaphragm 43, and the diaphragm 43 is arranged at the flow port 41 connecting the upstream side 39-2 and the downstream side 39-1 of the water supply channel 39.

The water supply port 44 is located below the diaphragm 43 including the upper end of the partition wall 40, and is opened and closed by the diaphragm 42.

The inlet 45 is located upstream of the water supply channel 39-2.
Is opened at one side of the valve closing pressure chamber 42, and a filter 49 is inserted into the inlet of the valve closing pressure chamber 42 so that water from which dust, foreign matters and the like have been removed flows into the valve closing pressure chamber 42. That is,
The opening / closing of the diaphragm 43 and the opening / closing of the solenoid valve 47 are considered so as not to be affected by the intrusion of dust, foreign matter and the like.

The atmosphere release outlet 46 is located on the downstream side 39 of the water supply channel 39.
-1, which is opened on the other side of the valve closing pressure chamber 42 located at -1, the water flowing into the valve closing pressure chamber 42 from the inflow port 44 does not stagnate in the pressure chamber 42 in the released state of the solenoid valve 47, Same pressure chamber
It is designed to flow out from 42.

The solenoid valve 47 serves to open and shut off the atmosphere release outlet 46 by the water supply signal and the stop signal output from the controller 4, and the atmosphere release outlet 46 is connected to the valve portion 47-1.
It is arranged on the bottom 48 of the machine frame 2 so as to be opened and closed by and is connected to the control unit 4.

Incidentally, in the water supply device of such an embodiment, as described in detail in the above embodiment, a battery 27 of a constant energizing type or a limited electric power by a lead wire 19 drawn from a utility pole is used.
It is possible to use any of the intermittent energization type in which the water level detector 3, the water temperature detector 7, and the solenoid valve 47 are energized by controlling the energization time by the timer 28.

Thus, according to the paddy water supply system of this embodiment, the electromagnetic waves are applied at the steps from step 21 to step 24 or from step 29 to step 35 described in detail in the flow chart shown in FIG. 3 or 6. Paddy 1 that operates valve 47 to open / close water supply port 44 with diaphragm 43
Automatic water supply to and stop water supply to.

[0037]

The water supply apparatus for paddy fields of the present invention is constructed as described above, and has the following effects. ． The water level in the paddy field is electrically detected by the water level detector,
The detected current water level information is output to the control unit and the control unit performs a comparison process with the set water level, and when the control unit determines that the current water level is lower than the set water level, the control unit A water supply signal is output to the water supply unit to start automatic water supply to the water supply unit. Then, when the current water level that rises with the water supply reaches the set water level, a stop signal is output to the water supply unit to stop the water supply to the water supply unit.

.. When the control unit determines that the current water level sent from the water level detector is lower than the set water level as described above, the control unit causes the motor to output a water supply signal and causes the motor to rotate normally in the direction to open the valve valve. By operating in the reverse direction, the support shaft is raised via the support part to disengage the valve valve from the water supply port of the water supply passage and start automatic water supply.
Then, when the current water level that rises with water supply reaches the set water level, the control unit outputs a stop signal to the motor to operate the motor in the forward or reverse direction to close the valve valve, and through the support unit. Stop the water supply by lowering the support shaft and seating the valve valve on the water supply port of the water supply passage.

.. When the control unit determines that the current water level sent from the water level detector is lower than the set water level as described above, the control unit causes the solenoid valve to output a water supply signal and causes the solenoid valve to open the atmosphere release port of the valve closing pressure chamber. The shutoff state is released, and the water that has stagnated in the valve closing pressure chamber is discharged to the outside through the atmosphere release port. As a result, the pressure in the valve closing pressure chamber drops, and the diaphragm that was pushed by the pressure in the valve closing pressure chamber and seated on the water inlet is pushed to the valve closing pressure chamber side by the water pressure on the upstream side of the water supply channel that sandwiches the partition wall. Then, the water is removed from the water supply port and the automatic water supply is started. When the current water level that rises with water supply reaches the set water level, the control unit outputs a stop signal to the solenoid valve to shut off the atmosphere opening port by the solenoid valve. As a result, the pressure in the valve closing pressure chamber rises due to the water flowing in from the inflow port, the diaphragm is pushed and is seated at the water supply port, and water supply is stopped.

.. Since the operation time of the water level detector and the water supply section is controlled by the timer, it is not necessary to always energize. That is, power consumption is less than that in the case of always energizing, power saving is achieved, and it is economical.

Therefore, according to the paddy field water supply apparatus of the present invention, the structure is greatly simplified as compared with the conventional apparatus, and moreover, the water level detector for detecting the water level in the paddy field, and the water level information of this water level detector is used to Since the water supply section for automatic water supply and stoppage is installed inside the machine frame, it can be expected to make the entire apparatus compact. Therefore, the transportation to the paddy field is simple, and at the same time, it can be installed in the paddy field only by the piping work for connecting the water supply channel to the water source.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a paddy field water supply device of the present invention installed in a paddy field

FIG. 2 is a block diagram of the water supply device.

FIG. 3 is a flowchart showing an operation of automatically supplying water based on a set water level and stopping the water supply when the set water level is reached.

FIG. 4 is a vertical sectional view of another embodiment of the water supply system for a paddy field of the present invention installed in a paddy field

FIG. 5 is a block diagram of the water supply device.

FIG. 6 is a flowchart showing an operation of automatically supplying water based on a set water level accompanying the management of the operating time by a timer and stopping the water supply when the set water level is reached.

FIG. 7 is a vertical cross-sectional view showing the main part of another embodiment of the water supply system for a paddy field of the present invention installed in a paddy field

[Explanation of symbols]

1 ... Paddy field 2 ... Machine frame 3 ... Water level detector 4 ... Control part 5 ... Water supply part 5-1 ... Valve valve 5-2 ... Support part 5-3 ... Motor 9 ... Water channel (water source) 10, 39 ... Water supply channel 10 -1 ... Water inlet 11 ... Support shaft 39-1 ... Downstream of water inlet 39-2 ... Upstream of water inlet 40 ... Partition wall 41 ... Flow port 42 ... Valve pressure chamber 43 ... Diaphragm 44 ... Water inlet 45 ... Inlet 46 ... Release to atmosphere Outlet 47 ... Solenoid valve

Claims (4)

[Claims] 1. A water level detector which is arranged in a machine frame and electrically detects the water level of a paddy field, and a control unit which performs a comparison process between a current water level output from this water level detector and a set water level, A paddy field water supply device comprising an automatic water supply and a water supply unit for stopping water according to the processing content output from the control unit. 2. The water supply system for a paddy field according to claim 1, wherein the water supply section is located opposite to an upward water supply port of a water supply passage introduced from the water source into the machine frame, and is arranged on the axis of the water supply port. A valve valve supported on a shaft, a support part rotatably arranged above the water supply port, and a support part screwed and supported on the support shaft so as to be vertically movable, and a side part of the support part. It consists of a motor that rotates the support part forward and backward, and the motor is connected to the control part and makes normal and reverse rotation according to the processing contents output from the control part, and raises and lowers the support shaft through the support part. The paddy water supply device is characterized in that the water supply port of the water supply passage is opened / closed by the valve valve. 3. The water supply system for paddy fields according to claim 1, wherein the water supply section is provided with a partition wall for partitioning the upstream side and the downstream side into a water supply passage introduced from the water source into the machine casing. Is constructed with a valve closing pressure chamber having a flow port that connects the upstream side and the downstream side across the partition wall, and a diaphragm is provided at the flow port of the valve closing pressure chamber, and a position facing the diaphragm is provided. Then, a water supply port that is opened / closed by a diaphragm is provided in the lower part including the upper end of the partition wall,
Further, an air release port is provided at an inlet that communicates with the valve closing pressure chamber from the upstream side of the water supply passage, and an atmosphere release outlet is provided to the outside from the valve closing pressure chamber, and a solenoid valve is provided at the outlet. Connected to the control unit, the atmosphere release port that is released from the valve closing pressure chamber to the outside is opened / closed according to the processing content output from the control unit, and the water supply port is opened / closed by the diaphragm. A paddy water supply device characterized by being configured. 4. The water supply system for paddy fields according to any one of claims 1 to 3, wherein a timer is connected to the control unit to control the operation time of the water level detector and the water supply unit. A characteristic paddy field water supply device.