JP5693207B2 - Water level adjustment type water tank - Google Patents

Description

  The present invention relates to a water level-adjustable water tank capable of adjusting the surface water level of a paddy field and the groundwater level in a farm field (hereinafter collectively referred to as “water level”).

  Conventionally, underground drainage pipes have been buried underground in paddy fields and fields, and excess damage from paddy fields and fields is discharged to reduce cold damage and wet damage. In recent years, in order to improve the growth situation of crops, so-called water tanks have been used to control the amount of drainage of underdrainage according to the weather and season and adjust the water level in paddy fields and fields.

  As a water tank as described above, for example, in Japanese Patent Application Laid-Open No. 2007-263332, when water is discharged from a culvert drain, a valve rod disposed inside a protective tube is lowered to seat the valve on the valve seat, When draining waste water, a vertical horizontal water tank is disclosed in which the valve rod is raised to open the valve (Patent Document 1). In this water tank, a plurality of water level adjustment holes are formed in the valve stem, and a water level adjustment collar having an inner diameter substantially equal to the outer diameter of the valve stem is fitted (paragraph [0011], FIG. 1, FIG. 7, etc.) ). The water level is adjusted by moving the water level adjustment collar up and down to expose / close the water level adjustment hole.

JP 2007-263332 A

  However, in the conventional water level adjustment type water tank including the invention described in the above-mentioned Patent Document 1, when adjusting the water level, the valve rod inserted in the protective tube is lifted upward, and then the water level adjustment collar is separately provided. Must be manually slid up and down to the desired position. For this reason, there is a problem that adjustment work is complicated and takes time.

  Moreover, in the conventional water tank, even if the water level is adjusted by the slide position of the water level adjusting collar, the actual water level is often shifted. For this reason, in order to accurately adjust to the desired water level, it is necessary to finely adjust the slide position while repeatedly confirming the adjustment work as described above. is there.

  Furthermore, the water level adjustment collar is tightly fitted to the valve stem to generate a high frictional force due to the structure in which the slide position is held only by the frictional force with the valve stem. For this reason, strong arm strength is required to slide in the vertical direction, which is a burdensome task for elderly people and women.

  Further, in the conventional water tank, the water level adjusting collar is formed with a comparatively small diameter because there is a possibility that the water level adjusting collar may slide down by its own weight. For this reason, since there is little controllable amount of drainage and it is difficult to adjust the water level quickly, there is a problem that it is impossible to secure a water reduction depth suitable for crops (a reduction in water level per day).

  If this reduced water depth is small, warm water on the surface will not reach the lower roots, resulting in a decrease in crop yield and quality, and water will stagnate, making it easy to generate methane gas. Since methane gas has a warming effect about 23 times that of carbon dioxide, improvement of the problem is also demanded from the viewpoint of global warming countermeasures. Furthermore, when it is desired to increase the amount of drainage or when the scale of a paddy field or a field is large, it is necessary to install a large number of water tanks. Therefore, it is extremely difficult to manage and adjust all the water tanks.

  The present invention has been made to solve such problems, and can perform water level adjustment work quickly and easily, and can control a large amount of drainage to ensure a desired water reduction depth, and management work. It aims at providing a water level adjustment type water tank that can simplify the process.

  The water level adjustment type water tank according to the present invention can be inserted into a T-shaped pipe formed by communicating a horizontal pipe connected to a culvert drain pipe and a vertical pipe rising upward from the horizontal pipe, and the vertical pipe. A plurality of drainage holes are formed at different height positions along the axial direction, and a valve body for blocking drainage in the horizontal pipe is provided at the lower end of the drainage hole. And a substantially cylindrical shape that is inserted into the vertical pipe and is slidably rotatable with respect to the outer peripheral surface of the waterstop cylinder, and has different height positions depending on the rotation position with respect to the waterstop cylinder. A rotating cylinder having an open slit that opens the drain hole.

  Further, as one aspect of the present invention, each drain hole of the water blocking cylinder is formed by shifting the position spirally along the circumferential direction, and the open slit of the rotating cylinder is linear along the axis. It may be formed.

  Furthermore, as one aspect of the present invention, the drain holes of the water blocking cylinder are arranged linearly along the axis, and the open slit of the rotating cylinder has one or both of the long sides with respect to the axis. It may be formed obliquely.

  Further, as one aspect of the present invention, the horizontal pipe communicates with a float pipe raised substantially in parallel with the vertical pipe, and the float pipe has an upper and lower depending on the water level in the vertical pipe. A moving float may be arranged.

  Furthermore, as one aspect of the present invention, a water level measuring unit that measures the water level in the vertical pipe, a storage unit that stores water level data suitable for a predetermined crop, and the rotary cylinder is driven to rotate with respect to the waterstop cylinder. A rotation drive means; and a control means for obtaining a measurement water level from the water level measurement means, obtaining water level data from the storage means, and driving the rotation drive means so that the measurement water level matches the water level data. You may have.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to adjust a water level quickly and easily, a large amount of drainage can be controlled and a desired water reduction depth can be ensured, and management work can be simplified.

It is a partial sectional view showing a first embodiment of a water level adjustment type water tank according to the present invention. It is the (a) whole view and (b) 2B-2B sectional view taken on the line which show the waterstop cylinder of this 1st Embodiment. It is the (a) whole view and the (b) 3B-3B sectional view taken on the line which show the rotation cylinder of this 1st Embodiment. It is a figure which shows the use condition of the water level adjustment type water tank in this 1st Embodiment, Comprising: (a) The state in which any drainage hole is not open | released, (b) The state which open | released the 2nd drainage hole from the bottom FIG. It is a partial cross section figure which shows 2nd Embodiment of the water level adjustment type water tank which concerns on this invention. It is a figure which shows the (a) rotating cylinder in the 2nd Embodiment, and the (b) water stop cylinder. In this 1st Embodiment, it is a block diagram which shows the structure which automates a water level adjustment operation | work.

  Hereinafter, a first embodiment of a water level adjustment type water tank according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the water level adjusting type water tank 1 </ b> A according to the first embodiment mainly stops the T-shaped tube 2 having a substantially T shape and the drainage flowing through the T-shaped tube 2. A water cylinder 3 and a rotating cylinder 4 that can slide and rotate with respect to the outer peripheral surface of the water blocking cylinder 3 are provided. Hereinafter, each component will be described in detail.

  The T-shaped pipe 2 is connected to a culvert drain pipe 23 buried underground in a paddy field or a farm field. As shown in FIG. 1, a horizontal pipe 21 arranged in a substantially horizontal direction, It has a vertical tube 22 that rises upward, and communicates so as to form a substantially T-shape. In the first embodiment, a culvert drain pipe 23 is connected to one end (right side in FIG. 1) of the horizontal pipe 21, and a drain pipe 24 connected to the drainage channel is connected to the other end (left side in FIG. 1). ing. In addition, a lid 25 is provided at the upper end of the vertical tube 22 to prevent foreign matters from entering.

  The waterstop cylinder 3 serves as a valve for controlling the drainage flowing through the T-tube 2. Specifically, as shown in FIGS. 2A and 2B, the waterstop tube 3 is formed in a substantially cylindrical shape having a size that can be inserted into the vertical tube 22, and is different along the axial direction. A plurality of drain holes 31 are formed at the height position. Further, in the first embodiment, each drain hole 31 is provided in a spiral manner along the circumferential direction of the water blocking tube 3. Specifically, it is formed such that its height position gradually increases clockwise in plan view.

  As shown in FIGS. 1 and 2, the lower end portion of the waterstop cylinder 3 is formed in a tapered shape from the downstream side to the upstream side of the horizontal tube 21. And the ring-shaped valve body 32 which interrupts | blocks the waste_water | drain in the horizontal pipe 21 is provided in the periphery of the lower end part. In the first embodiment, as shown in FIG. 1, a valve seat 26 that comes into contact with the valve body 32 is provided along the inner peripheral surface of the horizontal tube 21 to maintain a watertight state. Yes.

  Further, a rod-like contact member 33 that is in contact with the lower end portion of the vertical tube 22 and stabilizes the water stop tube is fixed to the lower end portion of the water stop tube 3. For this reason, when the waterstop cylinder 3 is in the lowered position, as shown in FIG. 1, the valve body 32 contacts the valve seat 26, and the contact member 33 contacts the lower end portion of the vertical pipe 22. Is firmly stabilized. On the other hand, as shown in FIGS. 1 and 2, a vertical movement handle 34 for opening and closing the valve body 32 by moving the water blocking cylinder 3 up and down is provided at the upper end of the water blocking cylinder 3.

  Further, as shown in FIGS. 1 and 2, the water stop tube 3 is provided with a holding member 36 that is slightly larger in diameter than the water stop tube 3 at a position below the lowermost drain hole 31. As shown in FIG. 1, the holding member 36 is in contact with the lower end portion of the rotating cylinder 4 and holds the height position of the rotating cylinder 4 with respect to the water blocking cylinder 3 at a predetermined position.

  The rotary cylinder 4 adjusts the water level by controlling the height of drainage when draining from the waterstop cylinder 3. Specifically, as shown in FIGS. 1 and 3, the rotating cylinder 4 is formed in a substantially cylindrical shape that is inserted into the vertical pipe 22 and is slidably rotatable with respect to the outer peripheral surface of the water blocking cylinder 3. The waterstop cylinder 3 is inserted in the inside. In the first embodiment, the rotary cylinder 4 is formed with a linear open slit 41 along the axis.

  As shown in FIGS. 1 and 3, the open slit 41 has a length that can overlap with all the drain holes 31 formed in the water blocking cylinder 3. With this configuration, in the rotating cylinder 4, the open slit 41 overlaps with one of the drain holes 31 formed in the water stopping cylinder 3 according to the rotational position with respect to the water stopping cylinder 3, and one of the drain holes 31 at different height positions. Part or all are open.

  As shown in FIGS. 1 and 3, a rotating handle 42 is provided at the upper end of the rotating cylinder 4 for rotating the rotating cylinder 4 to align the open slit 41 with a desired rotational position. As shown in FIG. 1, the shaft portion 44 of the rotary handle 42 is formed in a cylindrical shape so that the shaft portion 35 of the vertical movement handle 34 can be inserted. In addition, a reinforcing ring 43 is provided on the outer peripheral surface of the rotating cylinder 4 to ensure strength at a predetermined interval in the axial direction.

  Further, as shown in FIG. 1, a fixing member 27 for fixing the shaft portion 35 of the vertical movement handle 34 and the shaft portion 44 of the rotary handle 42 is provided on the lid 25 provided at the upper end portion of the vertical tube 22. It has been. The fixing member 27 fixes the shaft portion 35 and the rotary handle 42 of the vertical movement handle 34 in the raised position, and holds the valve body 32 of the waterstop cylinder 3 in an open state.

  Further, in the first embodiment, as shown in FIG. 1, the float pipe 5 raised substantially parallel to the vertical pipe 22 is communicated with the upstream side of the horizontal pipe 21. A float 51 having buoyancy is disposed in the float pipe 5, and a water level bar 52 serving as a water level index is inserted into the float 51. For this reason, in the state where the water stop cylinder 3 is stopped, since the drainage flows into the vertical pipe 22 and the float pipe 5 to the water level of the paddy field or the field as described later, the float 51 corresponds to the water level in the vertical pipe 22. To move up and down.

  The effect | action by the water level adjustment type water tank 1A of this 1st Embodiment provided with the above structure is demonstrated using drawing.

  When adjusting the water level of the paddy field and the groundwater level of the field by the water level adjustment type water tank 1A of the first embodiment, the waterstop cylinder 3 is lowered using the vertical movement handle 34 and the valve body 32 is moved into the horizontal pipe 21. It abuts on the valve seat 26. Accordingly, since the valve body 32 stops the drainage from the underdrainage, as shown in FIG. 4A, when the open slit 41 does not overlap any drainage hole 31, Then, it flows into the space between the vertical tube 22 and the rotary cylinder 4 and is pushed up to the same height as the water level of the paddy field or the field by the atmospheric pressure.

  Next, the rotary cylinder 4 is slid and rotated with respect to the water blocking cylinder 3 using the rotary handle 42, and the open slit 41 is aligned so as to overlap the drain hole 31 at a desired height position. Thereby, for example, when the second drainage hole 31 from the bottom is opened, the drainage filled in the space between the vertical tube 22 and the rotating cylinder 4 is removed as shown in FIG. The water overflows into the water stop tube 3 and is discharged from the lower end of the water stop tube 3 and is drained to the downstream side of the horizontal tube 21. Therefore, the water level of a paddy field or a field is adjusted to a position corresponding to the height of the drainage hole 31 opened.

  At this time, in the first embodiment, simply by rotating the rotating cylinder 4, the drain hole 31 at a desired height position is opened, so that the water level adjustment operation is simple and the water level can be adjusted quickly. . Moreover, since the rotating cylinder 4 does not slide down with respect to the water blocking cylinder 3, even if the diameter size is increased, the conventional problem does not occur. Therefore, since the amount of drainage that can be controlled by one water level adjustment type water tank 1A is increased and a large water reduction depth is secured, the water level of paddy fields and fields can be adjusted quickly according to changes in climate, temperature, etc., resulting in crop yield And improve the quality. In addition, since the number of water level adjustment type water tanks 1A can be reduced by increasing the amount of drainage, management work in a large-scale paddy field or field is simplified.

  In the first embodiment, when the water is stopped, the drainage flows into the float pipe 5 upstream of the vertical pipe 22 to the same water level as the vertical pipe 22. For this reason, the float 51 rises accurately to the water level and the water level rod 52 rises, so that the water level in the vertical pipe 22 that is substantially the same water level as the paddy field or the farm field can be visually recognized. Therefore, since the rotary handle 42 can be rotated while checking the water level in the vertical tube 22, the water level adjustment work becomes more efficient.

According to the first embodiment as described above, the following effects can be obtained.
1. The water level of paddy fields and fields can be adjusted quickly and easily.
2. The yield and quality of crops can be improved because the amount of drainage can be increased to ensure a large water reduction depth and the amount of oxygen supply can be increased.
3. It can be moved appropriately so that water does not spill, and generation of methane gas can be suppressed.
4). Since the number of water level adjustment type water tanks 1A installed in a large-scale paddy field or farm can be reduced, the management work becomes extremely simple.
5. Adjustment work can be performed while checking the water level, and work efficiency can be improved.
6). In addition to improving the effect of dry soil, it can increase the supply of oxygen by increasing the voids in the ground and promote respiration of crops, which has a positive effect on growth.

  Next, a second embodiment of the water level adjustment type water tank according to the present invention will be described with reference to the drawings. Note that, in the second embodiment, the same or corresponding components as those of the first embodiment described above are denoted by the same reference numerals and the description thereof is omitted.

  The water level adjustment type water tank 1B of the second embodiment is different from the first embodiment described above in the arrangement of the drain holes 31 in the water blocking cylinder 3 and the shape of the open slit 41 in the rotating cylinder 4. Specifically, as shown in FIGS. 5 and 6, each drain hole 31 of the water blocking tube 3 is arranged linearly along the axis, and the open slit 41 of the rotating tube 4 has one side thereof. It is formed obliquely with respect to the axis.

  In the second embodiment, only one side in the longitudinal direction of the open slit 41 is inclined with respect to the axis. However, the present invention is not limited to this configuration, and one of the long sides constituting the open slit 41 or Both may be formed obliquely with respect to the axis. That is, the open slit 41 may be constituted by two parallel sides that are inclined with respect to the axis and the upper and lower sides.

  When the water level is adjusted using the water level adjustment type water tank 1B of the second embodiment having the above-described configuration, as in the first embodiment described above, the water stop tube 3 is lowered to the water stop state, and then rotated. The tube 4 is rotated. Thereby, the open slit 41 formed obliquely closes each drain hole 31 gradually from a low position to a high position, or gradually opens each drain hole 31 from a high position to a low position.

  According to the second embodiment as described above, the water level can be adjusted in an analog manner in addition to the same effects as the first embodiment described above. However, it should be noted that if the width of the open slit 41 is too wide, the strength of the rotating cylinder 4 is lowered.

  Next, a third embodiment of the water level adjustment type water tank according to the present invention will be described with reference to the drawings. Note that, in the third embodiment, the same or corresponding components as those of the first embodiment described above are denoted by the same reference numerals and the description thereof is omitted.

  In the third embodiment, a configuration for automating the above-described water level adjustment work is added to the water level adjustment type water tanks 1A and 1B of the first embodiment or the second embodiment. Specifically, as shown in FIG. 7, the water level measuring means 6 for measuring the water level in the vertical pipe 22, the storage means 7 for storing water level data suitable for a predetermined crop, and the water cylinder 3 are rotated. Rotation driving means 8 for rotating the cylinder 4 and control means 9 for controlling each constituent means are provided.

  The water level measuring means 6 includes, for example, a position sensor that reads the position of the float 51, a water level sensor that can directly detect the water level, and the like. The storage means 7 is composed of a ROM (Read Only Memory), a RAM (Random Access Memory), a hard disk, etc. In addition to the water level data, there is a water level adjustment type water tank control program for executing the water level adjustment work. Installed. The rotation driving means 8 is provided on the rotary handle 42 of the rotary cylinder 4 and is composed of a stepping motor or the like capable of controlling the rotation position.

  The control means 9 is composed of a CPU (Central Processing Unit) and the like, and executes the water level adjustment type water tank control program. In accordance with this water level adjustment type water tank control program, the control means 9 obtains the measured water level from the water level measuring means 6, obtains the water level data from the storage means 7, and rotates the driving means so that the measured water level matches the water level data. 8 is driven.

  When the water level is adjusted by the water level adjusting type water tanks 1A and 1B having the above-described configuration of the third embodiment, the water level data suitable for a predetermined crop, the water level data according to the climate and temperature, etc. are stored in the storage means 7. Remember. As shown in FIG. 7, the control means 9 acquires the actual measured water level from the water level measuring means 6 at all times or at predetermined time intervals, and compares it with the water level data in the storage means 7. When the measured water level is different from the water level data, the control means 9 calculates the rotational position of the rotary cylinder 4 for making the measured water level coincide with the water level data, and outputs a drive signal for rotating to the rotational position. Output to 8.

  According to the third embodiment as described above, the water level of a paddy field or a farm can be automatically maintained at a constant value. For this reason, especially in a field, the germination rate can be improved by maintaining the groundwater level at a predetermined height.

  In addition, the water level adjustment type water tank according to the present invention is not limited to the above-described embodiments, and can be appropriately changed.

  For example, the shape and the number of the drain holes 31 of the water blocking cylinder 3 and the open slits 41 of the rotating cylinder 4 are not limited to the shapes of the above-described embodiments, and the rotating cylinder 4 depends on the rotational position with respect to the water blocking cylinder 3. The open slit 41 may be configured to open the drain holes 31 at different height positions.

DESCRIPTION OF SYMBOLS 1A, 1B Water level adjustment type water tank 2 T-shaped pipe 3 Water stop cylinder 4 Rotating cylinder 5 Float pipe 6 Water level measuring means 7 Storage means 8 Rotation drive means 9 Control means 21 Horizontal pipe 22 Vertical pipe 23 Dark culvert drain pipe 24 Drain pipe 25 Lid 26 Valve seat 27 Fixing member 31 Drain hole 32 Valve element 33 Contact member 34 Vertical movement handle 35 Shaft part of vertical movement handle 36 Holding member 41 Opening slit 42 Rotation handle 43 Reinforcement ring 44 Shaft part of rotation handle 51 Float 52 Water level bar

Claims (3)

A T-shaped pipe formed by communicating a horizontal pipe connected to the underdrain pipe and a vertical pipe raised upward from the horizontal pipe;
It is formed in a substantially cylindrical shape that can be inserted into the vertical pipe, and a plurality of drain holes are formed at different height positions along the axial direction, and the drainage in the horizontal pipe is blocked at the lower end thereof. A waterstop cylinder provided with a valve body to perform,
The drain hole is formed in a substantially cylindrical shape that is inserted into the vertical pipe and is slidable and rotatable with respect to the outer peripheral surface of the water blocking cylinder, and the drain holes at different height positions are opened according to the rotation position with respect to the water blocking cylinder. and a rotary cylinder having an open slit,
Each drainage hole of the water blocking cylinder is arranged linearly along the axis, and the open slit of the rotating cylinder has one or both of the long sides formed obliquely with respect to the axis. Type water tank. The horizontal pipe communicates with a float pipe raised substantially parallel to the vertical pipe, and a float that moves up and down in accordance with the water level in the vertical pipe is disposed in the float pipe. Item 10. A water level-regulated water tank according to item 1 . Water level measuring means for measuring the water level in the longitudinal pipe;
Storage means for storing water level data suitable for a given crop;
Rotation driving means for rotating the rotating cylinder with respect to the water blocking cylinder;
And a control means for obtaining a measured water level from the water level measuring means, obtaining water level data from the storage means, and driving the rotation driving means so that the measured water level matches the water level data. The water level adjustment type water tank according to claim 1 or claim 2 .

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