JPH11113431A - Rice paddy water level adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice paddy water level adjusting device consuming the small amount of electricity. SOLUTION: This rice paddy water level adjusting device is equipped with a water gate part 10 built in a water overflowing plate for partitioning between an entering chamber communicating with a flowing in tube 11 and an exit chamber communicating with a water discharging tube 12, and for changing the water overflow level from the entering chamber through the exit chamber, a tubular supporting pole 50 standing straight at the upper surface of the water gate part 10 installed on the upper part of the water gate 10 and a control box 30 built in a receiving part, a controlling part, a battery, a motor, a driving mechanism part, so as to constitute for controlling the motor so that the reading of a potentiometer for detecting the level change of the water overflowing plate agrees with the set water height and cutting off the electric source for the motor and controlling device when the both of them agree each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting a water level of a paddy field, and more particularly to a paddy water level adjusting apparatus which has little aging and consumes less power.

[0002]

2. Description of the Related Art Automatically controlling the water level of a paddy field to a desired set value by combining a motor-operated valve disposed at a water supply port and a drain port of the paddy field with a sensor for detecting the water level of the paddy field is, for example, a special technique. It is proposed by Kohei 6-87856. In this known device, when a set value of the paddy water level is given, the actual water level detected by the sensor is compared with the set value, and the electric valve on the water supply side or the drain side is opened and closed to set the paddy water level in advance. It is controlled to match the value.

[0003]

Although this known device is sufficient in terms of labor saving in irrigation work, in general, when changing the water level of a paddy field, a large amount of water must be irrigated or drained. Must. To change the water level by 10 cm in a 1 hectare paddy field, 1000 tons of water must be discharged or supplied.

In order to supply and drain such a large amount of water,
It takes a long time, during which the sensors and controls for detecting the water level must be activated. Also,
In this type of water level adjustment device, since a power line cannot be drawn from the outside, it is configured to be driven by an independent power source such as a battery. It was getting bigger and needed a large capacity battery.

[0005] It is an object of the present invention to provide a paddy water level adjusting device with low power consumption.

[0006]

In order to achieve the above object, the present invention provides an inlet chamber communicating with a paddy field, an outlet chamber communicating with a drain, and a space between the inlet chamber and the outlet chamber. Partition, overflow means from which the overflow height from the inlet chamber to the outlet chamber is adjustable, drive means mechanically connected to the overflow means to change the overflow height, and interlocking with the overflow means Position detection means for detecting the overflow height as a signal,
A control device for activating the driving means so that the detected overflow height reaches an overflow height corresponding to a water level set value transmitted from the outside.

According to the present invention, the overflow means partitions between the inlet chamber communicating with the paddy field and the outlet chamber communicating with the drainage ditch, and adjusts the overflow height from the inlet chamber to the outlet chamber. The driving means is mechanically connected to the overflow means to change the overflow height. The position detection means detects the overflow height as a signal in conjunction with the overflow means. The control device activates the driving means such that the detected overflow height reaches the overflow height corresponding to the water level set value transmitted from the outside.

Thus, the driving means and the control device need only be connected to the power supply and operated only for a short time for setting the water level, and the power consumption of the paddy water level adjustment device can be reduced.

[0009]

1 and 2 are a front view and a side view, respectively, of a paddy field water level adjusting device embodying the present invention. The paddy water level adjusting device includes a lower sluice 10, a column 50 standing upright on the upper surface of the sluice 10, and a control box 3 supported by the column 50.
0 and a solar cell 70 provided above the control box 30.

As shown in FIG. 3, the water gate section 10 includes a frame 15 having a substantially rectangular parallelepiped shape with a horizontal cross section,
5, a water level adjusting chamber 16, and an inflow pipe 11 provided on a surface facing the paddy field which communicates with the water level adjusting chamber 16.
And a drain pipe 12 provided on the opposite surface.

The water level adjusting chamber 16 comprises an inlet chamber 16a and an outlet chamber 16b. The inlet chamber 16a and the outlet chamber 16b are defined by overflow means, that is, an overflow plate 13 which slides up and down. As shown in FIG. 4, the overflow plate 13 is provided with an overflow port 14 at an upper portion, and when the overflow plate 13 is vertically displaced, the water level of the inlet chamber 16a changes. As shown in FIG. 2, a water level gauge 17 is provided to check the water level of the inlet chamber 16a.

FIG. 3 is a plan view showing a cross section of a part of the water gate section 10 as viewed from above. The water level adjusting chamber 16 is fixed to the frame body 15 by a stay 18 extending inward from the frame body 15. ing. At the center of the water level adjustment chamber 16, a guide chamber 19, which is formed into an elongated rectangle and surrounds the overflow plate 13, is formed. As shown in FIG.
0, which extends further below the frame 15 on the bottom surface of the
To secure the space when is displaced to the bottom.

The both sides of the overflow plate 13 and the lower three sides are:
A packing 20 made of an elastic body such as rubber and having a U-shaped cross section is sandwiched from right and left to maintain watertightness. As shown in FIG. 5, the support 21 of the lower packing 20 is disposed with a gap in the center so that the overflow plate 13 can be displaced downward. The overflow plate 13 is made of stainless steel or a fluororesin (trade name: Teflon) in order to prevent rust or slime from adhering over a long period of time.
Is preferably coated.

However, since paddy water contains a lot of mud and other foreign matter, it is necessary to take care that such foreign matter does not enter the sliding portion between the overflow plate 13 and the packing 20. As a countermeasure, the packing 20 has a U-shaped cross-section, and has a structure in which foreign matter attached to the overflow plate 13 is scraped off at the end face of the U-shaped tip.

However, if a large amount of foreign matter enters and the foreign matter accumulates on the sliding portion, the scraping effect is reduced. Therefore, the nylon brush 23 is filled inside the packing 20 with the overflow plate 13.
In contrast, foreign matter is prevented from accumulating on the sliding portion between the overflow plate 13 and the packing 20 by making contact at an angle of approximately 45 degrees. A similar effect can be obtained by using a plastic plate, rubber, or the like instead of the brush 23.

A column 50 made of a steel pipe is provided at the center of the upper surface plate 25 of the floodgate 10 by welding, and an operation rod 51 is provided through the column. The lower end of the operating rod 51 is connected to the overflow plate 13.

FIGS. 6 to 8 show the detailed structure of the control box 30. FIG. 6 and 7, a support 54 is fixed by a bolt 56 to a flange 53 welded to the upper end of a column 50, and the control box 30 is placed on the support 54. The support 54 has a stay 31 extending into the control box 30.
a, 31b, 31c, 31d are provided, and a mechanism for driving the operation rod 51 is attached to these stays.

The operation rod 51 is provided on a guide 3 attached to the lower surface of the support 54 and the upper ends of the stays 31b and 31c.
Guided by 2a, 32b. Guides 32a, 32
For b, use is made of a metal having a self-lubricating property (for example, trade name OILES metal).

A motor 33 integrally provided with a driving means, ie, a reduction gear 34, is attached to the stay 31a, and its output shaft 36 is connected to a pinion shaft 38 via a pair of couplings 37a, 37b. Coupling 37
b and the pinion shaft 38 are in a square shaft sliding fit,
By compressing the coupling spring 39, the coupling 37b
Is displaced to the left, the coupling 37b is disengaged from the coupling 37a. Normally, the coupling 37a is operated by the coupling spring 39.
And 37b maintain the combined state.

The pinion shaft 38 is provided with stays 31b and 31c.
And the pinion 40 is fixed between both stays.

The pinion 40 is engaged with a rack 51a connected to the operation rod 51.
The forward and reverse rotation displaces the operation rod 51 up and down.

The other end of the pinion shaft 38 is
1 through a potentiometer 43 as a position detecting means.
Linked to The potentiometer 43 is a pinion 40
Is taken into the controller 45 as a signal. The signal of the potentiometer 43 indicates the displacement of the operation rod 51 and indicates the overflow height of the overflow plate 13.

The rack 51 is located above the upper guide 32b.
A switch support 46 extending in parallel with a is provided, limit switches 47a and 47b are provided near upper and lower ends thereof, and a switch board 48 is provided near the center.

The limit switches 47a and 47b are for forcibly shutting off the power supply of the motor 33 when the tip of the rack 51a goes out of the range of both limit switches when the motor 33 goes out of control for some reason. .

The switch board 48 is provided with a switch for manually turning on / off the power and an on / off switch for locally operating the drive motor 33 without passing through the receiver 60.

The switch for turning on / off the power is used, for example, to open the power when the paddy water level adjusting device is not used, as in winter, and the on / off switch for manually operating the motor 33 is Used for adjustment of the drive mechanism of the device.

The control device includes a receiver 60 and a controller 45. The receiver 60 receives a wireless input signal from a transmitter (not shown) when setting the water level of the paddy water level adjusting device. To send the signal to the controller 45,
When the overflow plate 13 operates up to the set overflow height, a signal from the potentiometer 43 indicating the overflow height is transmitted to the transmitter side to notify the height position of the overflow plate 13.

The antenna 61 of the receiver 60 extends below the control box, and the outer periphery of the antenna is protected by a pipe 62 made of vinyl chloride or the like.

Reference numeral 71 denotes a battery which stores the power of a solar cell 70 provided above the control box 30 and
0, the controller 45, and the motor 33.

A door 49 is provided on the front surface of the control box 30, a gasket 64 for watertightness is provided around the opening closed by the door 49, and a portion where the rod 51 extends downward is provided. , A bellows 65 for sealing is provided,
With the door 49 closed, the watertightness of the control box 30 is maintained.

As shown in FIG. 7, the battery 71 is housed on an arm 67 extending forward from a bolted plate 66 on the back surface of the control box 30 and employs a support system in which the door 49 is easily opened and pulled out forward. doing.

As shown in FIGS. 1 and 2, a solar cell 70 is provided on the control box 30, and the generated power is stored in a battery 71.

The controller 45, the receiver 60, the motor 33, and the battery 71 are mutually connected by a power supply line and a signal line, but the lines are not shown.

Next, the operation of the paddy water level adjusting device will be described. Paddy water level adjustment device, as shown in FIG.
An inflow pipe 1 is provided on a ridge 8 between the drainage ditch 7 of the paddy field 5 and the paddy field 5.
1 is installed so that the lower part is the same or slightly lower than the paddy field.

This paddy water level adjusting device is operated by radio, and when a paddy water level setting signal is sent from a transmitter (not shown), the signal is received by the receiver 60 and the set water level is sent to the controller 45. Send a signal.

In the controller 45, the potentiometer 43
Then, the current position signal value of the overflow plate 13 obtained from the above is compared with the set water level signal value, the direction in which the overflow plate 13 should be moved, that is, the rotation direction of the motor 33, is determined, and the motor 33 is driven.

The rotation of the motor 33 is transmitted to the output shaft 36 via the speed reducer 34 and rotates the pinion 40 via the couplings 37a and 37b and the pinion shaft 38. The rack 51a moves upward or downward by the rotation of the pinion 40, and the overflow plate 13 also moves by the movement of the operation rod 51 connected to the rack 51a, and the height of the overflow port 14 changes.

The rotation of the pinion 40 is also transmitted to the potentiometer 43, and its output signal changes according to the rotation angle. Therefore, the controller 45 determines that the set water level signal value matches the signal value from the potentiometer 43. , Motor 3
The power supply to 3 is stopped, and the overflow plate 13 is held at that position.

When setting the water level, the operation time of the paddy water level adjusting device is completed within a few minutes at the longest. Once the water level setting is completed, the apparatus is not operated until the next water level setting, for example, day and night.
Are turned off, and only the receiver 60 is in a standby state so that it can cope with the next water level setting.

If the position of the overflow plate 13 changes, the height of the overflow port 14 changes, so that the paddy water level also changes accordingly.

Each time a water level setting signal is output from a transmitter (not shown), the above operation is performed and the water level at the overflow port 14 is always followed so as to be the set water level.

When the power of the motor 33 is released,
Even if an external force due to water flow or the like acts on the overflow plate 13, the position is maintained because there is a speed reducer 34 with a large reduction ratio (for example, 1/1800) in the middle.

Since the water level management of the paddy field is performed for a long period from the time of rice transplanting to the time of growing the rice, water overflow, dirt, etc. adhere to the overflow plate 13 immersed in the paddy water, and the sliding portion However, a nylon brush 23 is provided in front of the packing 20 so that these foreign substances do not enter the sliding portion between the U-shaped packing 20 and the overflow plate 13.

Therefore, the operation is stable for a long time, and the possibility of applying an excessive load to the motor 33 is reduced.

The operating rod 51 for applying a driving force to the overflow plate 13 is passed through the inside of the pipe-like column 50 so that the sluice 10
Since the movable mechanism is guided to the inside, there is no portion where the movable mechanism is exposed to the outside, and there is no possibility that vines and weeds get caught in the movable portion.

Further, the rack 51a is provided with the guides 32a, 3
Guided by 2b, the pinion 40 is meshed with the pinion 40 at a position between the two guides, so that the meshing state between the pinion and the rack can be kept good for a long period of time.

The strut 50 is used to keep the control box 30 at a predetermined height above the floodgate 10. When the paddy is submerged due to flooding or the like, the equipment in the control box 30 is broken down due to snow. To prevent

If several types of columns 50 and operation rods 51 having different lengths are prepared, other parts are common,
Devices with different heights can be provided.

In a paddy field in Japan, if a column having a length of about 1 m to 2 m is prepared, it can sufficiently cope with flood and snow damage.

Next, when an abnormality occurs in the motor 33 or the control system of the motor 33 and the overflow height is to be set manually, the door 49 of the control box 30 is opened and the coupling 37b is pushed to the left in the figure. If the manual handle 80 shown in FIG. 10 is inserted between them, the pinion shaft 38 is disconnected from the output shaft 36, while the projection integral with the coupling 37b is Hole 8
0a, so by turning the manual handle 80,
The pinion 40 can be easily rotated manually.

Therefore, even if a failure occurs in the electric system, the overflow water level can be manually set to a desired level.

[0052]

According to the paddy water level adjusting apparatus of the present invention, the overflow plate whose overflow height is adjustable is driven by a motor, and the motor is operated until the reading of the potentiometer for detecting the position of the overflow plate coincides with the set water level. As a result, the motor and controller need only be connected to the power supply and operated only for a short time during the water level setting. As a result, the capacity of the battery can be reduced, and the capacity of the solar cell can be reduced. Can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a paddy water level adjusting device embodying the present invention.

FIG. 2 is a side view of the paddy water level adjusting device of FIG. 1;

FIG. 3 is a plan view showing a water gate part of the apparatus shown in FIG.

FIG. 4 is a front view showing a section of the sluice in FIG.

FIG. 5 is a sectional view taken along the line VV in FIG. 4;

FIG. 6 is a front view showing a control box of the apparatus shown in FIG.

FIG. 7 is a partial cross-sectional side view of the control box of FIG. 6;

FIG. 8 is a partial cross-sectional plan view of the control box of FIG. 6;

FIG. 9 is a side view showing an installation state of the apparatus of FIG. 1;

FIG. 10 is a sectional view of a manual handle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... water gate part, 11 ... inflow pipe, 12 ... drain pipe, 13 ... overflow board, 16 ... water level adjustment chamber, 16a ... inlet chamber, 16b ... outlet chamber, 20 ... packing, 23 ... brush, 30 ... control box, 33 ... motor, 34 ... reducer, 40 ... pinion, 4
3 ... potentiometer, 45 ... controller, 50 ... post, 5
DESCRIPTION OF SYMBOLS 1 ... Operation rod, 51a ... Rack, 60 ... Receiver, 70
... Solar cell, 71 ... Battery

Claims (4)

[Claims] 1. An inlet chamber communicating with a paddy field, an outlet chamber communicating with a drain, and a partition between the inlet chamber and the outlet chamber, and an overflow height from the inlet chamber to the outlet chamber is adjusted. Possible overflow means, drive means mechanically connected to the overflow means to change the overflow height, and position detection means for detecting the overflow height as a signal in conjunction with the overflow means,
A control device for activating the driving means such that the detected overflow height reaches an overflow height corresponding to a water level set value transmitted from the outside, the paddy water level adjusting device. 2. The paddy water level adjusting device according to claim 1, wherein the control device has a wireless receiver, and the water level set value is transmitted to the receiver by a wireless signal. 3. The apparatus according to claim 1, wherein said position detecting means comprises:
A paddy water level adjusting device, being a potentiometer connected to an output shaft of the driving means. 4. The apparatus according to claim 3, wherein said driving means has a rack connected to said overflow means, and a pinion meshed with said rack and driven by a motor, and said potential meter is connected to a pinion shaft. Paddy water level adjustment device characterized by the following.