JP2827096B2 - Automatic flow controller for in-field water etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically adjusting the level of irrigation water in a field where rice is being cultivated.

[0002]

2. Description of the Related Art In recent years, rice cultivation has been required to increase productivity in order to gradually expand rice imports and to eliminate gaps between domestic and foreign countries. Farming policies are being developed. As for the cultivation method of rice cultivation in a large-compartmented field, low-cost labor-saving cultivation is being studied, and various research and development are being conducted. In order to ensure low-cost cultivation of rice cultivation, it is important to manage water in accordance with the growing stage of rice.Conventionally, workers manually move the partition plate provided at the irrigation opening of the irrigation canal up and down. Is opened and closed, and the level of the irrigated water is adjusted to a constant level while the water irrigated in the field is gradually overflowed from the overflow plate provided at the drain port. However, in the water management method, it is necessary to adjust the partition plate of the irrigation port while continuously checking the water level of each field even for a short time every day. The burden is large, and manual water management cannot cope with water management in a large-area farm. Therefore, in recent years, a device for automatically adjusting the water level using a float for water management in the field has been developed, and an opening / closing door biased by a weight in a direction to close the irrigation port of the irrigation canal, and a device installed in the field. Between the water level detection device using the float, a line that performs power transmission so that the opening and closing door is opened by the balance between the biasing force of the weight and the gravity of the float is interposed,
An automatic irrigation system for paddy fields that maintains the water level at a constant level while opening and closing the open / close door by converting the vertical width at which the float rises or falls due to the rise and fall of the water level, and converts it to winding by opening and closing the door. It is proposed in Japanese Unexamined Patent Publication No. Hei 6-46448.

[0003]

However, in the automatic irrigation system of the paddy field, since a line and a fluctuation mechanism must be interposed between the float and the opening / closing door, the responsiveness of the opening / closing door to the vertical fluctuation width of the float is required. And the airtightness of the opening / closing door is low, so that the water level in the field cannot be reliably maintained at the set water level. In addition, when foreign matter adheres to the striated line, the water level rises with the opening and closing door open and the growing rice lands, or the water is depleted with the opening and closing door closed. It is easy to cause poor growth of rice during cultivation. In addition, since the above-mentioned apparatus has many parts, it has many problems in spite of being automated, and has troubles such as troublesome maintenance and inspection and high production cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to automatically adjust and hold irrigation water in a field at a constant water level and, in particular, to make a large compartment. Even when water is irrigated with a large-diameter pipe for irrigation in the field, the response of the opening and closing operation of the valve is quick, the airtightness at the time of closing the valve is high, and the water level in the field can be accurately controlled, and the structure can be improved. Another object of the present invention is to provide an automatic flow control device for in-field water or the like, which is simple, easy to maintain and inspect, and inexpensive to manufacture.

[0005]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 is provided at least in a vertically moving part of the water level of irrigation water in the field 90 in order to irrigate the field 90. Cylindrical pipe 12, a rotary shaft 14 horizontally supported in the cylindrical pipe 12, and a valve element 1 fixed to the rotary shaft 14 and opening and closing the pipe 12.
6 and a drive setting unit 18 that is linked to the rotating shaft 14 and drives the valve 16 to open and close in response to a change in the water level of the water in the field 90. The drive setting unit 18 In-field water or the like comprising two arms 30, which are connected to both outer ends of the shaft 14 and rotate with a change in the water level of the water, and a float 32 attached to the distal end of the arm 30. The automatic flow control device 10 of FIG.

Further, in the invention according to claim 2, the float 32 may be attached to each of the arm portions 30 so as to be adjustable in arm length.

[0007] In the invention according to claim 3, the float 32 may be composed of a planar float body 33.

Further, in the invention according to claim 4, the two arm portions 30 are engaged with an arm rod 34 connected and fixed to the rotating shaft 14 so as to be able to slide and adjust along the arm rod 34. Guide tube 36 which is stopped and connected and fixed to the float 32
May be provided.

Further, in the invention according to claim 5, the guide cylinder 36 may be provided with the support shafts 42 for fixing the floats horizontally in the direction of the outer surface of the cylindrical pipe 12. Good.

In the invention according to claim 6, each of the floats 32 may be supported by the support shaft 42 in a freely rotating manner.

Further, in the invention according to claim 7, each of the floats 32 may be connected in a substantially arch shape so as to be mounted on the cylindrical conduit 12.

Further, in the invention according to claim 8, the water level in the field 90 rises to lock the arm 30 which has been turned upright by the buoyancy of the float 32, and the cylindrical pipe 12 A lock section 46 for holding the valve open or closed state of the arm section 30;
Is unlocked, and the valve element 16 that has opened or closed the inside of the cylindrical pipe 12 by rotating the arm portion 30 in the horizontal direction.
And a lock release unit 46 for closing or opening the valve.

According to the ninth aspect of the present invention, the lock portion 46 includes an arc guide portion 50 provided near the rotary shaft 14 and at least corresponding to a rotation range of the arm portion 30. A movable body having a guide body 54 having an engagement groove 52 on a substantially upper surface side, and an engagement element 56 provided on the arm portion 30 so as to be vertically slidable and engaging and disengaging from the engagement groove 52 with the vertical movement. The body 58 may be provided.

In the invention according to claim 10, the guide body 54 may be formed in a disk shape.

According to the eleventh aspect of the present invention, the unlocking portion 48 is pivotally attached to a lower surface position of the pipeline 12 substantially corresponding to the arm portion 30 and is disposed in a direction intersecting the pipeline 12. , While engaging with the movable body 58,
Has an operating rod 84 for vertically moving the operating rod 84,
At one end, a float 86 is fixed, and at the other end, it engages with the movable body 58, and the buoyancy of the float 86 causes the operating rod 84 to tilt downward to move the movable body 58 downward. The engaging element 56 is engaged with the floating element 8 and the water level is lowered.
6 may be provided so as to lower the height position and move up the end of the operating rod 84 to push up the movable body 58 to release the engagement lock by the engagement element 56.

[0016]

According to a first aspect of the present invention, there is provided an automatic fluid flow control device for a fluid, wherein a cylindrical pipe is communicated with an irrigation channel and disposed in a field, and an arm length of the float with respect to the arm is adjusted to a set water level of the irrigation water. After irrigation starts. At the start of irrigation, the float descends, the valve body is irrigated while the valve is opened in the horizontal direction, the water level rises to the set water level, the float rises while floating on the water surface, and the arm that rotates in conjunction with the float The valve element is gradually closed by the torque of the section, and at the set water level, the valve element closes the pipeline and stops irrigation. When the water level of the irrigation water in the field decreases gradually due to overflow from the drain, underground infiltration, or evapotranspiration and the water level falls, the float descends, and at the same time, the interlocking arm rotates in the horizontal direction Then, the valve is opened, irrigation water is irrigated, the water level rises again to the set water level, and the valve is closed and stopped. In this manner, the valve can be opened and closed by the arm while sensing the set water level with the float, and the water level of the water can be automatically kept substantially constant. This makes it possible to automatically maintain the irrigation water in the field at the set water level,
There is no need to manage irrigation in the field every day, and irrigation management becomes easy. In particular, large rotational torque can be obtained with the floats arranged on both sides of the pipeline, and the valve can be opened and closed reliably,
The responsiveness of the opening and closing operation of the valve body to a change in the water level is fast, the airtightness when the valve is closed is high, and the water level in the field can be reliably maintained at the set water level. Further, the structure of the apparatus is simple, the number of parts is small, the manufacturing cost can be provided at low cost, and maintenance and inspection are easy.

According to the second aspect, the float is attached to each arm so as to be adjustable in arm length. The upper limit water level at which the float floats is determined by the arm length, and the water level in the field can be set freely from a low position to a high position according to the growth of the rice.

According to a third aspect of the present invention, the float is a planar float. The planar float body is flat, has a large area in plan view, and has a large water landing area when floating on the water surface. Therefore, the waterline below the water surface when floating on the water surface is shallow, and it is possible to sufficiently cope with a change in water level while floating on the water surface with a shallow water depth. In addition, since the water landing area is large, the buoyancy generated in the float when the water level rises per unit height is large, and the buoyancy and the arm length of the arm portion can reliably obtain a rotational torque for opening and closing the valve element.

According to a fourth aspect of the present invention, the two arm portions are locked with an arm rod connected and fixed to the rotation shaft so as to be slidable and adjustable along the arm rod. And a guide tube connected and fixed to the guide tube. The water level of the water can be adjusted and set while the guide cylinder is easily slidably locked along the arm and the state can be maintained.

According to a fifth aspect of the present invention, a support shaft for fixing each of the floats is protruded from the guide cylinder horizontally in the outer surface direction of the cylindrical pipe. In order to support the float on this support shaft, when the floater moves up and down in response to a change in the water level while floating on the water surface, the vertical movement is not hindered by the cylindrical pipeline, and the water level in the field is lowered from a high position to a low level. The water level can be adjusted to be almost constant while freely setting the position.

According to the sixth aspect, each of the floats is supported by the support shaft in a freely rotating manner. The float can respond to changes in water level while floating substantially horizontally on the water surface, and the valve can be reliably opened and closed by rotating the arm rod from a substantially upright state to a horizontal state.

According to a seventh aspect of the present invention, each of the floats is connected in a substantially arch shape so as to be mounted on the cylindrical pipe. The arch-shaped floats are constantly stably floated on the water surface and are less likely to sway due to wind or the like, and can stably detect the water level of the water surface.

According to the eighth aspect, the water level in the field rises to lock the arm that has been turned upright by the buoyancy of the float, and the valve body opens or closes the cylindrical pipe. The lock portion that holds the state, the water level in the field drops, and the lock of the arm portion is released, and the horizontal rotation of the arm portion opens or closes the cylindrical pipe. And a lock release part for closing or opening the valve element. When the water level rises while irrigation is being carried out in the field, the valve that has closed or opened the pipeline is locked by the lock section, and the water level falls and the lock is released by the unlock section to open the pipeline. Valve or close. As a result, intermittent irrigation that intermittently raises or lowers the water level in the field can be performed.

According to a ninth aspect of the present invention, the lock portion includes an arc guide portion provided near the rotary shaft and corresponding to at least a rotation range of the arm portion.
A guide body provided with an engagement groove on a substantially upper surface side, and a movable body provided on the arm portion so as to be vertically slidable, and having an engagement element which is disengaged from the engagement groove with the vertical movement. Become.
When the water level in the field rises, the arm portion that has been turned upright in a substantially vertical direction is locked by being engaged with the engagement groove while the engaging element slides on the arc guide portion of the guide body, and is locked. Intermittent irrigation into the field can be reliably realized while maintaining the valve open or valve closed state.

According to a tenth aspect, the guide is formed in a disk shape. The engaging element of the movable body is engaged with the engaging groove at the substantially upper surface position while being guided by the arc guide portion of the guide formed in a disk shape when the arm portion rotates, so that the arm portion can be accurately locked. . In addition, since it has a disk shape, manufacture is easy.

According to the eleventh aspect, the unlocking portion is pivotally attached to a lower surface position of the pipeline substantially corresponding to the arm portion and is disposed in a direction intersecting the pipeline. The operating rod has an operating rod for moving the movable body up and down while being engaged, the floating rod is fixed to one end of the operating rod, the other end is engaged with the movable body, and the operating rod is lowered by the buoyancy of the floating element. The movable body is moved downward by tilting, and the engaging element is engaged in the engaging groove, and the water level is lowered to lower the height position of the float to move the end of the operating rod upward. It is provided so as to push up the body to release the engagement lock by the engagement element. When the water level in the field falls and approaches the soil surface, the floating member at one end of the operating rod moves down and pushes up the movable body at the other end of the operating rod that has moved upward, thereby locking the arm. Irrigation can be resumed with proper release, and intermittent irrigation can be continued.

[0027]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 4 show an automatic flow control device 10 for in-field water or the like according to an embodiment of the present invention. As is clear from the figure, an automatic flow control device (hereinafter, abbreviated as an automatic flow control device) 10 for in-field water or the like is provided.
A cylindrical conduit 12 installed at least in the vertical movement part of the water level of the irrigation water in the field to irrigate the field,
Rotating shaft 1 horizontally supported in cylindrical pipe 12
4, a valve body 16 fixed to the rotating shaft 14 and opening and closing the inside of the pipe 12; and the valve body 16 interlocking with the rotating shaft 14 and corresponding to a change in the water level of the water in the field. And a drive setting section 18 for opening and closing.

The cylindrical pipe 12 is made of a hard synthetic resin or metal. Therefore, ready-made tubing can be used at low cost. The cylindrical conduit 12 is installed on the upper surfaces of base frames 22, 22 which are fixed at positions near both ends of the upper surface of a substrate 20, also formed of a hard synthetic resin, metal, or the like, and is fastened to the upper surfaces near both ends of the conduit 12. The bands 24, 24 are wrapped around and fixed to the base frames 22, 22. By installing the cylindrical pipes 12 on the base frames 22 of the substrate 12, the cylindrical pipes 1 can be arranged in a field.
2 can be prevented from being buried in the soil, and a vertical movement of a float or the like described later can be efficiently maintained. The pipe 12 may be installed in, for example, a draw channel of a field and an agricultural canal, and may be installed so as to be submerged in a vertical movement range of a water level.
The drive setting unit may be arranged at a position where it is constantly exposed to the outside from the water level due to the adjustment of the length of the arm unit.

A shaft hole is formed in both side surfaces at an intermediate position of the cylindrical pipe 12, and both ends of a rotary shaft 14 are supported by the shaft hole, and both ends of the rotary shaft 14 are directed outward from inside the pipe. It is protruding. As shown in FIGS. 2 and 6, the valve body 16 fixed to the rotary shaft 12 is formed in a circular blade plate 26 capable of closing the cylindrical conduit 12, and the circular blade plate 26 is configured as shown in FIG. In the state where the pipe 1 is perpendicularly crossed to the pipe 12 shown in FIG.
The inside of the pipe 2 is closed, and the inside of the pipeline 12 is opened in a state where it falls down in the horizontal direction indicated by a virtual line.

When the circular vane plate 26 is turned upright in the direction of the arrow from the horizontal state in which the valve is opened and the valve is closed, the stoppers 28, 28 at which the upper and lower ends of the circular vane plate 26 abut, are positioned vertically in the pipeline. It is fixed to. Note that the valve element 16 is not limited to the circular blade plate 26, and may be formed as an elliptical blade plate that can close the inside of the pipeline 12 in a state of obliquely intersecting with the pipeline 12.

The drive setting unit 18 is connected to both outer ends of the rotating shaft 14 and is connected to two arms 30 and 30 that rotate with a change in the water level of the water. And floats 32, 32 attached thereto. As shown in FIG. 1, FIG. 2, and FIG.
Are connected to both ends of the rotating shaft 14 in a substantially L shape. The floats 32, 32 are formed using a foam material or the like having a low specific gravity. Thereby, the float 32,
Reference numeral 32 can secure a rotational torque for opening and closing the valve body 16 together with the arms 30 and 30 with a slight change in the water level while floating on the water surface. Further, since the structures of the arm portion 30, the float 32, and the like are simple, the processing is easy and the manufacturing can be performed at low cost.

The floats 32, 32 are attached to the respective arm portions 30, 30 so that the arm length can be adjusted. The water level rises as water is irrigated into the field, and the floats 32 rise while floating on the water surface to gradually raise the arms 30 from a substantially horizontal state. As a result, the valve element 16 in the pipe 12 rotates from the horizontal state in which the pipe is opened to the upright direction, and when the arm portions 30 and 30 are displaced in a substantially vertical direction, the valve element 16 The inside is closed and irrigation is stopped. This valve body 16
Is closed, the irrigation water level when irrigation is stopped, that is, the set water level is determined by the floats 32, 3 attached to the arms 30, 30.
When the arm length is long, the service water level is held at a high water level, and when the arm length is short, the service water level is maintained at a low water level.

After the valve body 16 in the cylindrical pipe 12 is closed and irrigation is stopped, the water stored in the field is overflowed from the drainage port and eroded by underground penetration or solar heat. As the water level drops due to this water reduction, float 3
While the arms 2 and 32 are also lowered, the arm portions 30 and 30 are gradually rotated backward in the horizontal direction from the standing state, and the valve body 16 is opened. Then, the water is again irrigated from the irrigation channel into the field, and the irrigation water level rises to the set water level, and the valve element 16 is closed in a state in which the arm portion 30 stands substantially vertically.

Thus, the water used for irrigation into the field by the drive setting unit 18 can be automatically maintained at the set water level corresponding to the arm length of the arm unit 30, and it is not necessary to manage the irrigation to the field daily. Irrigation management becomes easy. Especially,
Even when the field is divided into large sections and irrigation is performed using a large-diameter pipe, a rotational torque corresponding to the arm length of the two floats 32 and 32 is maintained at both ends of the rotary shaft 14 of the valve body 16 so as to maintain a balance. The valve body 16 can be reliably opened and closed while adding, the response of the opening and closing operation of the valve body 16 to a change in water level is fast, the airtightness when the valve is closed is high, and the water level in the field can be reliably maintained at the set water level. . Further, since the structure of the apparatus is simple, maintenance and inspection are easy, and the manufacturing cost can be provided at low cost. Furthermore, the water level in the field can be freely set from low to high according to the growth of the rice, so that the rice can grow healthy.

As shown in FIGS. 1, 3 and 4, the float 3
2 and 32 are formed on the planar floats 33 and 33. In the embodiment, the planar float body 33 is formed in a flat and long box shape using, for example, foamed styrene obtained by foaming a synthetic resin. A substantially central portion of the long box-shaped float body 33 is horizontally attached to the arm 30. The planar float body 33 has a large area in plan view, and a large water landing area when floating on the water surface. Therefore, since the surface float 33 has a large landing area, the float generated by the change of the water level per unit height is large, and the valve body 16 is opened and closed by the buoyancy and the arm length of the arm 30. The rotation torque can be reliably obtained.

The float body 33 has a shallow draft line when it floats on the surface of the water. The float floats on the water surface at a shallow depth, and sufficiently responds to a slight rise or fall of the water level. , The rotational torque for opening and closing the valve body 16 can be easily secured. Further, the flat float body 33 formed in the shape of a flat and long box is replaced with another planar float body 33 having a different volume in a plane, or is connected to a joint and the arm portion 3 is connected.
The buoyancy can be adjusted by increasing or decreasing the volume of the planar float body 33 in a plane while being attached to zero, and the rotational torque for opening and closing the valve body 16 can be adjusted.

As shown in FIGS. 1, 4 and 6, the two arm portions 30, 30 are connected to arm rods 34, 34, which are connected and fixed to both ends of a rotating shaft 14 which is supported by the pipeline 12, and the arms 30 Rods 34, 3
Guide tubes 36, 36 which are locked so as to be slidable along 4 and are connected and fixed to the float 32. In the embodiment, the lower end of the arm rod 34 is joined to the end face of the rotating shaft 14 in an L shape, and a small screw 38 is screwed and fixed to the rotating shaft 14 from the lower end side of the arm rod 34. Further, the guide cylinder 36 has a locking screw 40 screwed into a screw hole formed on the outer peripheral surface thereof, and can be fixed at an arbitrary position while moving up and down in the longitudinal direction of the arm rod 34.

Thus, when the guide cylinder 36 is slidably engaged with the rotation shaft 14 of each arm 34, the set water level is low.
When the guide cylinder 36 is slidably locked near the tip of the arm rod 34, the set water level becomes high, and the water level is adjusted and set while easily slidingly locking the guide cylinder 36 along the arm rod 34. State can be maintained. The arm rods 34, 34 fixed to both ends of the rotary shaft 14 are fixed in the pipe 12 in the same direction as the valve body 16 fixed to the rotary shaft 14, but are not necessarily limited to this. For example, as shown in FIG. 7, the valve body 16 may be adjusted and fixed to the rotary shaft 14 with a small screw 38 in a state where the valve body 16 is inclined toward the valve opening direction. Thus, when the water level of the water drops, the arm 34 can be reliably rotated in the valve opening direction of the valve body 14.

As shown in FIGS. 1 and 3, the guide cylinders 36, 36
The support shafts 42, 42 for fixing the floats 32, 32 are horizontally provided in the direction of the outer surface of the cylindrical pipe 12 so that the floats 32, 32 are located at substantially the central position from one side. Support shafts 42, 42 penetrated to the other side
, And are supported in a free-rotating manner. Accordingly, when the floats 32, 32 supported by the support shafts move up and down in response to a change in the water level while floating on the water surface, the cylindrical pipeline 1
The water level in the field can be adjusted while freely setting the water level in the field from a high position to a low position without hindering the vertical movement in Step 2. Also, the floats 32, 32 float on the water surface almost horizontally and change in water level. Thereby, the arm rods 34, 34 are turned from the substantially upright state to the horizontal state, and the valve body can be reliably opened and closed.

As shown in FIG. 1, the floats 32, 32 are connected in a substantially arch shape so as to be mounted on the cylindrical conduit 12. In the embodiment, each of the floats 32, 32 arranged in parallel on both sides of the cylindrical pipe 12 has two arch-shaped connecting frames 44, 44 provided at positions near both ends thereof.
Accordingly, even when a wave is generated on the water surface due to wind or the like, the float floating on the water surface has little swing, and the water level of the water surface can be maintained while opening and closing the valve while detecting the water level of the water surface. In addition, float 3
Instead of arranging the floats 2 and 32 in a row, the floats 32 and 32 are integrally formed in an arch shape to form support shafts 42 and 4 for the arm rods 34 and 34.
In this case, the float has little fluctuation against the wind and the like, and can detect the water level of the water surface while floating stably, and can reliably control the opening and closing of the valve body in the pipeline. Become.

As shown in FIG. 9, the automatic flow control device 10 is arranged in the field by connecting the cylindrical pipe 12 to the irrigation canal, and the floats 32, 32 with respect to the arms 30, 30 are arranged.
After adjusting the arm length to the set water level H of the water W, watering is performed, the water level rises to the set water level H, the valve body 16 is closed with the torque of the floats 32 and 32 to stop watering, and the water level is lowered. Prevent it from rising. When the water irrigated in the field is gradually reduced due to overflow from the drain, underground infiltration, or evapotranspiration, and the water level falls, the floats 32, 32 descend, and the arm parts 30, 30 which are simultaneously interlocked. Is rotated in the horizontal direction, the valve body 16 is opened, the water is irrigated again, the water level rises to the set water level H, the valve is closed, and the watering stops. In this way, the valve 32 is opened and closed by the arms 30, 30 while the set water level H is sensed by the floats 32, 32, so that the water level of the service water W is kept substantially constant.

In rice cultivation, instead of keeping the water level constantly constant, the water level is alternately moved up and down alternately between a high position and a low position, and the soil is exposed to the air as the water level falls, and It requires intermittent irrigation to activate and to grow healthy seedlings. For this purpose, FIG. 3, FIG. 5, FIG.
As shown in the figure, the automatic flow control device 10 locks the arm 30 that has been raised and raised substantially in the vertical direction by the buoyancy of the float 32 due to the rise of the water level in the field. A lock portion 46 for holding the valve 12 in an open or closed state;
Is unlocked, and the valve element 16 that has opened or closed the inside of the cylindrical pipe 12 by rotating the arm portion 30 in the horizontal direction.
And a lock release unit 48 for closing or opening the valve.

The lock portion 46 includes an arc guide portion 50 provided at the vicinity of the rotary shaft 14 and corresponding to at least the rotation range of the arm portion 30 and an engagement groove 52 substantially on the upper surface side. A movable body 58 having a guide body 54 and an engaging element 56 which is provided on the arm section 30 so as to be slidable up and down, and which engages with and disengages from the engaging groove 52 with the vertical movement.
And As shown in FIG. 3 and FIG.
Is formed in a disc shape, an engagement groove 52 is cut out on the upper surface side, and a V-shaped inner bottom surface 60 to which the lower end of the engagement element 56 is engaged is formed on the inner surface. In addition, the circumferential surface of the disc-shaped guide 54 serves as an arc guide 50, and the end of the engaging element 56 slides in contact with the rotation of the arm 30. Further, as shown in FIG.
A shaft hole 62 is opened substantially at the center of the guide 54. By forming this guide body 54 in a disk shape,
The engagement groove can be securely locked and held by the engagement groove while slidingly guiding the engagement element 56, so that the shape is simple and the manufacture is easy. This guide 5
4, a shaft hole 62 penetrates the rotating shaft 14 protruding from one side surface of the pipe 12, a packing 64 is fixed in a gap between the guide 54 and the pipe 12, and a plurality of screws are provided from the outer surface side of the guide 54. 66 is screwed and fixed to the packing 64.

The arm rod 3 of the arm 30 is attached to the end of the rotating shaft 14 protruding from the guide 54 fixed to the side of the pipe 12.
4 is fixed in an L shape with small screws 38. The movable body 58 is formed of a hollow cylindrical body 68 inserted into the arm rod 34. As shown in FIG. 6, the hollow cylindrical body 68 has a rotating shaft 24 at an inner surface side and an outer surface side at a substantially central portion. And an outer surface long hole 72 for adjusting and fixing the arm rod 34 to the rotating shaft 14 with the small screw 38 are formed.

Further, at the upper end on the inner surface side of the hollow cylindrical body 68,
The engaging member 56 shown in FIGS. 5 and 6 is fixed.
6 has a V-shaped inner bottom surface 60 of the engagement groove 52 of the guide body 54.
A V-shaped tip 74 is formed to engage with. Further, a weight plug 76 is fitted to the lower end of the hollow cylindrical body 68, and the hollow cylindrical body 68 is raised and held along the arm rod 34 on the outer peripheral surface near the upper end to always lock the engaging element 56. Opening lock hole 7
The arm rod 3 is located above the hollow cylinder 68.
A locking hook 80 is removably locked to 4. By locking the locking hole 78 of the hollow cylindrical body 68 with the locking hook 80, the engaging element 56 is not locked.

The floats 32 rise to the set water level H due to the rise of the water level while being irrigated into the field, and the valve body 16 is connected to the pipes 30 by the arm portions 30 that rise in a substantially vertical direction in conjunction with the float. When closing the inside of the path 12, the V-shaped protruding end of the engaging element 56 of the movable body 58 rises in an arc shape while sliding on the arc guide portion 50 of the guide body 54, and is provided at the upper surface position of the guide body 54. The closed state of the valve body 16 is locked by the engagement element 56 being engaged with the engagement groove 52 in a falling shape.

Then, the irrigation into the field was stopped, and the water in the field gradually descended due to overflow from the drain port, underground infiltration and evapotranspiration, and descended to the lower limit water level L close to the soil surface. When the unlocking portion 48 is operated, the movable body 58 is pushed up, the engaging element 56 is disengaged from the engaging groove 52 of the guide body 54, and the arms 30, 3 are weighted by the weights of the floats 32, 32.
0 moves in the horizontal direction, the valve element 16 is opened, and irrigation is started again. Therefore, it is possible to perform intermittent irrigation in which the water level in the field is intermittently and alternately changed from the upper limit set water level H to the lower limit water level L. When the water level falls to the lower limit water level L near the soil surface, the root hairs of the seedlings grow. Activated by touching the air
Healthy seedlings can be raised.

As shown in FIGS. 1, 4 and 6, the lock release section 48 is provided with a pipe 1 substantially corresponding to the arm sections 30 and 30.
2 is connected to a hinge 82 provided at the lower surface position of
2, and has an operating rod 84 that moves the movable body 58 up and down while engaging with the movable body 58. The operating rod 84 has a floating member 86 fixed to one end thereof, and the other end engaged with the movable body 58. Float 8
Reference numeral 6 denotes a square rod made of a foam material as in the case of the float 32, and is connected to the end of the operating rod 84 in a T-shape. In addition, it is not limited to a foam material, for example. It may be formed in a hollow cylinder sealed with light metal. The operating rod 84
At the other end thereof, a projection 88 abutting on the lower end of the movable body 58
Is provided.

Thus, the operating rod 84 is moved by the buoyancy of the float 86.
Is tilted downward to move the movable body 58 downward, thereby engaging the engagement element 56 in the engagement groove 52 of the guide body 54, and lowering the water level to lower the height of the float 86 so that the operating rod 84
By moving the end portion upward, the movable body 58 is pushed up and the engagement lock by the engagement element 56 is released. When the water level in the field drops to the lower limit water level L, the floating member 86 at one end of the operating rod 84 moves down, and the movable body 58 is pushed up by the projection 88 at the other end of the operating rod 84 that has moved up. The intermittent irrigation can be continued while the lock of the arm unit 30 is accurately released. In the embodiment, the arm is locked by the lock portion when the water level rises and the valve body is closed, and the lock is released when the water level gradually decreases and falls to the lower limit water level. Continue intermittent irrigation while opening the valve, but not limited to this, lock the valve with a valve-opening body with a lowered water level, release the lock when the water level rises to the set water level, and open the cylindrical pipe. The valve may be closed.

Next, the operation of the automatic flow control device 10 for in-field water or the like according to the present invention will be described. As shown in FIG. 9, the automatic flow control device 10 is installed on a soil surface in the field 90 by connecting a water conduit 94 connected to one end of the cylindrical pipe 12 to a water channel 92 for irrigating the field 90, The water pipe 94 is provided with a water stop valve 96. When the seedlings are transplanted, since there is no need for intermittent watering, the engaging element 56 of the movable body 58 slidably fitted to the arm rod 34 of the lock portion 46 is disengaged from the engaging groove 52 of the guide 54. The locking hole 78 is locked to the locking hook 80 to open the lock portion 46.

Therefore, after adjusting the arm length of the floats 32 with respect to the arm portions 30 and 30 according to the set water level H of the service water W, the water stop valve 96 is opened to irrigate the field 90. Due to this irrigation, the water W is stored in the field 90, the water level gradually rises, and the floats 32, 32 floating on the water surface rise together with the arms 30, 30 while rising.
Rises while turning from the horizontal direction to the vertical direction, and the valve element 16 in the pipe line 12 also turns in the vertical direction from the state opened in the horizontal direction to close the opening in the pipe line 12. I will do it.

When the water level of the service water rises to the set water level H of the floats 32, 32, the valve body 16 completely closes the pipe 12 by the rotation torque utilizing the buoyancy of the floats 32, 32, and irrigation stops. And prevent the water level from rising. When the water W irrigated in the field gradually decreases due to overflow from the drain, infiltration into the ground, or evapotranspiration and the water level falls, the float 3
2 and 32 are lowered, and the arms 30 and 30 are simultaneously operated.
Is rotated in the horizontal direction, the valve element 16 is tilted and the valve is opened, the water is irrigated again, the water level returns to the set water level H, and the valve element 16 is closed. In this way, the valve 32 is opened and closed by the arms 30, 30 while the set water level H is sensed by the floats 32, 32, so that the water level of the service water W is kept substantially constant.

Therefore, the water W to be irrigated into the field 90
Can be automatically maintained at the set water level H, and it is not necessary to manage irrigation in the field every day, and irrigation management becomes easy. In particular, a large-diameter pipe is used for irrigation to a large section of the field, and the valve 16 can be reliably opened and closed even when the flow rate is large, and the response of the opening and closing operation of the valve 16 to a change in water level is quick, The airtightness when the valve is closed is high, and the water level in the field can be reliably maintained at the set water level. Further, the structure of the apparatus is simple, the number of parts is small, the manufacturing cost can be provided at low cost, and maintenance and inspection are easy.

Next, when intermittent watering is required to alternately and intermittently maintain the water level of the irrigation water in the field at the set water level H and the lower water level L that has been lowered and reduced, the arm rod 34 Locking portion 46 which is slid upwardly and locked by locking hook 80
The engaging hook 80 of the movable body 58 is disengaged and slid downward. Then, the floats 32, 32 rise to the set water level H due to the rise of the water level while being irrigated into the field, and the arms 30, 30, which stand in a substantially vertical direction by rotating in conjunction with the float.
When the valve body 16 closes the inside of the pipe line 12 by the
The V-shaped protruding end 74 of the engaging element 56 rises in an arc shape while sliding on the arc guide portion 50 of the guiding body 54, and the engaging element 56 is dropped into the engaging groove 52 provided at the upper surface position of the guiding body 54. The valve body 16 is locked by being engaged.

Then, the irrigation into the field is stopped, and the water in the field gradually descends due to overflow from the drain port, underground infiltration and evapotranspiration, and the water level reaches a lower limit water level L close to the soil surface. When descending, the floating member 86 of the unlocking portion 48 descends and the movable body 58 is pushed up at the raised end of the operating rod 84, the engaging element 56 is disengaged from the engaging groove 52 of the guide 54, and the float 32, With the weight of 32, the arms 30 and 30 are rotated in the horizontal direction, the valve body 16 is opened, and watering is started again. Therefore, it is possible to perform intermittent irrigation by intermittently displacing the water level in the field from the upper limit water level to the lower limit water level intermittently. As a result, healthy seedlings can be raised.

As described above, the automatic flow rate adjusting device 10 for in-field water according to the present invention is connected to the irrigation port from the irrigation canal so as to automatically detect the level of irrigation water in the field and maintain a constant water level. It is also possible to hold the water and to perform intermittent watering, and it is not necessary for the worker to manage water every day, and the water level in the field can be reliably maintained and the rice seedlings can be grown healthy. The automatic flow control device 10 is not limited to being installed at the irrigation port of the irrigation canal, but may be provided at the drain port.
May be connected to each other, and also in this case, the water level in the field can be kept constant. Further, the automatic flow control device 10 of the present invention is not limited to water level adjustment in a field, for example, in order to automatically adjust and maintain the water level of a culture pond such as shrimp, the water supply port and the drainage port of the culture pond. It is also possible to automatically adjust and maintain the water level in the culture pond while installing and adjusting the flow rate, thereby facilitating water management in the pond.

[0057]

As described above, according to the automatic flow control device for field water or the like according to the first aspect, in order to irrigate the field, at least the vertical movement of the water level of the water irrigated in the field. An installed cylindrical pipe, a rotary shaft horizontally supported in the cylindrical pipe, a valve body fixed to the rotary shaft, and opening and closing the pipe, and interlocking with the rotary shaft A drive setting unit that drives the valve body to open and close in response to a change in the water level of the water in the field, wherein the drive setting unit is connected to both outer ends of the rotating shaft, and By providing the two arms that rotate with the change and the float attached to the tip of this arm, the water that is irrigated into the field can be automatically held at the set water level, There is no need to manage irrigation in the field every day, making irrigation management easier. . In particular, a large-diameter pipe is used for irrigation to a large plot of field, and the valve can be opened and closed reliably even when the flow rate is large, the responsiveness of opening and closing of the valve to changes in water level is fast, and the valve is closed. The airtightness at the time of performing is high, and the water level in the field can be reliably maintained at the set water level. Further, the structure of the apparatus is simple, the number of parts is small, the manufacturing cost can be provided at low cost, and maintenance and inspection are easy.

According to the second aspect, the float is attached to each arm so as to be adjustable in arm length, so that the water level in the field can be reduced.
It can be set freely from the low position to the high position according to the growth of the rice, and the rice can grow healthy.

According to the third aspect of the present invention, since the float is formed of a planar float body, a water landing area in a plan view is large, and buoyancy generated in the float due to a change in water level per unit height is large. With this buoyancy and arm length, a torque for opening and closing the valve can be reliably obtained. In addition, the flat float body can operate sufficiently in response to a slight change in water level even at a shallow water surface, and adjusts buoyancy by changing the volume in a plane by changing with other floats, connecting joints, etc., The torque can be adjusted properly.

According to a fourth aspect of the present invention, the two arm portions are locked with an arm rod connected and fixed to the rotation shaft so as to be slidable and adjustable along the arm rod. When the guide cylinder is slid and locked near the rotation axis of the arm rod, the set water level is low, and the guide cylinder is slid and locked near the tip of the arm rod. When this is done, the set water level rises, and the water level can be adjusted and set while the guide cylinder is easily slidably locked along the arm rod, and that state can be maintained.

According to a fifth aspect of the present invention, the guide tube is provided with the support shafts for fixing the floats horizontally in the direction of the outer surface of the cylindrical conduit, so that the guide tubes are fixed to the support shafts. When the float floats on the water surface and moves up and down in response to the change in water level, the vertical movement is not hindered by the cylindrical pipeline, and the water level in the field is freely set from a high position to a low position. The water level can be adjusted to be almost constant.

According to the sixth aspect, each of the floats is supported by the support shaft in a freely rotatable manner, so that the floats float substantially horizontally on the water surface and the arm rods by changing the water level. The valve can be reliably opened and closed by rotating from a substantially upright state to a horizontal state.

According to the seventh aspect, the floats are connected in a substantially arch shape so as to be mounted on the cylindrical pipe, so that a wave is generated on the water surface by wind or the like. Even if you do, the float floating on the water surface has little swing,
The water level of the water surface can be maintained while opening and closing the valve body while detecting the water level of the water surface.

According to the eighth aspect, the water level in the field rises to lock the arm that has been turned upright by the buoyancy of the float, and the valve body opens or closes the cylindrical pipe. The lock portion that holds the state, the water level in the field drops, and the lock of the arm portion is released, and the horizontal rotation of the arm portion opens or closes the cylindrical pipe. By providing a lock release unit that closes or opens the valve body, intermittent irrigation can be performed to intermittently alternately shift the water level in the field from the upper limit water level to the lower limit water level when the lower limit water level is provided. The root hairs of rice are exposed to the air and activated, and the rice can be grown healthy.

According to the ninth aspect, the lock portion includes an arc guide portion provided near the rotation shaft and corresponding to at least a rotation range of the arm portion.
A guide body provided with an engagement groove on a substantially upper surface side; and a movable body provided on the arm portion so as to be slidable up and down, and having an engagement element which engages and disengages with the engagement groove along with the vertical movement. With this configuration, when the water level in the field rises to the upper limit position, the valve element can be kept open or closed while properly locking the arm portion that stands substantially vertically, and intermittent watering to the field can be maintained. Can be reliably realized.

According to the tenth aspect, the guide body is formed in a disk shape, so that the engaging element of the movable body is formed by the guide member formed in the disk shape when the arm rotates. While being guided by the arc guide portion, the arm portion can be accurately locked by engaging with the engagement groove at the substantially upper surface position. Further, the shape is simple and the production is easy.

According to the eleventh aspect, the unlocking portion is pivotally attached to a lower surface position of the pipeline substantially corresponding to the arm and is disposed in a direction intersecting the pipeline, and is provided on the movable body. The operating rod has an operating rod for moving the movable body up and down while being engaged, the floating rod is fixed to one end of the operating rod, the other end is engaged with the movable body, and the operating rod is lowered by the buoyancy of the floating element. The movable body is moved downward by tilting, and the engaging element is engaged in the engaging groove, and the water level is lowered to lower the height position of the float to move the end of the operating rod upward. When the water level in the field falls to the lower limit position, the float at one end of the operating rod moves downward and moves upward when the water level in the field falls to the lower limit position. Push the movable body up at the other end of the operating rod and release the arm lock properly. Reluctant, and thus be able to continue the interruption irrigation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an automatic diverting cloth adjusting device for in-field water or the like according to the present invention.

FIG. 2 is a partially enlarged longitudinal sectional view of the cylindrical conduit shown in FIG.

FIG. 3 is a side view of a state in which the water level of the service water has dropped and the arm portion has fallen horizontally together with the float.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a partially enlarged side view showing a state in which the arm portion is locked by being turned upright in the vertical direction.

FIG. 6 is an enlarged sectional view taken along line BB of FIG. 5;

FIG. 7 is a longitudinal sectional view showing a state in which an arm portion is slightly inclined in a valve opening direction and fixed to a rotating shaft with respect to a valve body in a pipeline.

FIG. 8 is an operation explanatory view showing a correspondence relationship between a float, a valve body, a lock portion, and the like.

FIG. 9 is an explanatory view showing a state in which the automatic flow control device for field water or the like according to the present invention is installed in a field.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Automatic flow regulator for field water etc. 12 Cylindrical pipeline 14 Rotating shaft 16 Valve element 18 Drive setting part 30 Arm part 32 Float 34 Arm rod 36 Guide cylinder 42 Support shaft 46 Lock part 48 Lock release part 50 Arc guide part 52 engaging groove 54 guide body 56 engaging element 58 movable body 84 operating rod 86 float 90 90 field W water H setting water level L lower limit water level

Claims (11)

(57) [Claims] 1. A cylindrical pipe installed at least in a vertically moving part of a water level of water irrigated in a field to irrigate a field, and a rotation horizontally supported in the cylindrical pipe. A shaft, a valve body fixed to the rotation shaft, for opening and closing the inside of the pipeline, and a drive setting for driving the opening and closing of the valve body in response to a change in the water level of the water in the field in conjunction with the rotation shaft. The drive setting unit is connected to both outer ends of the rotating shaft, and is connected to two ends of the arm that rotates with a change in the water level of the water, and is attached to a tip end side of the arm. With a float,
An automatic flow controller for in-field water or the like, comprising: 2. The apparatus according to claim 1, wherein the float is attached to each arm so as to be adjustable in arm length. 3. The automatic flow control device according to claim 1, wherein the float is a planar float body. 4. The arm tube connected to and fixed to the rotating shaft, the two arm portions are locked so as to be slidable and adjustable along the arm bar, and a guide tube connected and fixed to the float. The automatic flow control device for in-field water or the like according to claim 1 or 3, further comprising: 5. The automatic flow control device according to claim 4, wherein the guide tube is provided with a support shaft for fixing each of the floats horizontally in the direction of the outer surface of the cylindrical pipe. . 6. The automatic flow control device according to claim 5, wherein each of the floats is supported by the support shaft in a freely rotating manner. 7. The automatic flow control of water for use in a field according to claim 1, wherein each of the floats is connected in a substantially arch shape so as to be mounted on the cylindrical pipe. apparatus. 8. A lock section for locking an arm section which has been turned upright due to the buoyancy of the float when the water level in the field has risen, and which holds the valve of the cylindrical pipe opened or closed by the valve element. When the water level in the field drops, the arm is unlocked, and the arm is rotated in the horizontal direction to close or open the valve body that has opened or closed the cylindrical pipe. The automatic flow control device for in-field water or the like according to any one of claims 1 to 7, further comprising: a lock release unit that opens the valve. 9. A guide body provided at a near edge of the rotation shaft and provided with an arc guide portion corresponding to at least a rotation range of the arm portion and an engagement groove on a substantially upper surface side. And a movable body provided on the arm portion so as to be slidable up and down, and having an engaging element which engages and disengages with the engaging groove along with the up and down movement thereof. Automatic flow controller. 10. The automatic flow control device according to claim 9, wherein the guide is formed in a disk shape. 11. The unlocking portion is pivotally attached to a lower surface position of a pipeline substantially corresponding to the arm portion and is disposed in a direction intersecting the pipeline, and is engaged with the movable body while being engaged with the movable body. The operating rod has a floating member fixed at one end, and the other end is engaged with the movable body, and the operating rod tilts downward by the buoyancy of the floating member to move the movable body. The movable body is pushed up by moving the movable body downward by lowering the water level, lowering the height position of the float and moving the end of the operating rod upward, while lowering the water and lowering the height of the float. 9. The system according to claim 8, wherein the engagement lock is released.
11. The automatic flow control device for field water or the like according to any one of claims 10 to 10.