JP6245699B2 - Drainage equipment - Google Patents

Description

  The present invention relates to a drainage device, and is particularly used in, for example, a field where field rotation is performed, draining the surface water above the set water level during flooding and adjusting the water level, and during dry fields such as field cropping, from deep grooves or underground. The present invention relates to a novel drainage device that discharges wastewater.

  Conventionally, in paddy fields, in order to adjust the water level of the surface water according to the growth process of rice, etc., a drainage device (also called a water level adjuster or water outlet) that drains the surface water above the set water level and adjusts the water level. .) Is provided.

  For example, Patent Document 1 discloses an example of a conventional drainage device. The drainage device of Patent Document 1 includes an outer cylinder and an inner cylinder fitted therein. A window portion is formed in the upper portion of the side wall of the outer cylinder, and the opening height of the window section can be arbitrarily changed by moving the inner cylinder functioning as a weir vertically. A drain pipe is connected to the downstream end of the outer cylinder. During flooding, the upper end of the inner cylinder is adjusted so that it is at the desired height of the water surface, and the excess surface water exceeding the upper end of the inner cylinder is drained into the drainage pipe so that the water level of the surface water reaches the desired height. Kept.

JP 11-28028 A [A01G 25/00]

  In recent years, in order to improve paddy field agriculture, the number of fields in which the field is changed every few years is alternately increased between the field and the field. Here, in the field cropping period, in order to prevent moisture damage, it is necessary to appropriately drain water from deep trenches or underground. In addition, it is necessary to appropriately drain water from deep trenches or underground when performing back cropping in the winter or simply draining water from the field.

  However, in the technique of Patent Document 1, although the surface water can be drained and the water level can be adjusted, the drainage from the deep groove or the ground cannot be discharged. Therefore, it is conceivable to separately provide a drainage facility for draining water from deep trenches or underground, but this increases the equipment cost, and is difficult to implement especially in small-scale fields operated individually by part-time farmers. .

  Therefore, the main object of the present invention is to provide a novel drainage device.

  Another object of the present invention is to provide a drainage device having a simple configuration, capable of draining the surface water above the set water level and adjusting the water level, and discharging drainage from deep trenches and underground. is there.

  A first invention is a drainage device for draining drainage from deep grooves or underground when draining paddy water above the set water level and adjusting the water level during drowning, and having a bottomed vertical tube with an open top. An outer cylinder having a drainage inlet and a discharge outlet formed at the lower end of the side wall, and a first inner cylinder that is fitted in the outer cylinder and can be opened and closed by rotating up and down or circumferentially. And a drainage device comprising a second inner cylinder that has a rice field water inlet formed at the upper end and is inserted into the first inner cylinder and can move up and down to change the height position of the rice field water inlet. .

  In the first invention, the drainage device has a triple cylinder structure including an outer cylinder, a first inner cylinder, and a second inner cylinder, and is used in a field where field rotation is performed. Water is drained to adjust the water level, and drainage from deep grooves or underground is discharged during dry paddy fields. The outer cylinder is formed in a bottomed vertical tube having an open upper end, and a drainage inlet and an outlet are formed at the lower end of the side wall. The first inner cylinder is fitted in the outer cylinder, and opens and closes the drainage inlet of the outer cylinder by moving up and down or rotating in the circumferential direction. Moreover, a 2nd inner cylinder is inserted in a 1st inner cylinder, and changes the height position of the rice field water inflow port formed in the upper end part by moving up and down.

  According to the first invention, by opening and closing the drainage inlet using the first inner cylinder, it is possible to control the availability of drainage from the deep groove or underground, and the height of the rice field water inlet using the second inner cylinder. By adjusting the water level, the surface water level can be adjusted. That is, with a simple configuration in which the drainage device has a triple cylinder structure, it is possible to drain the surface water above the set water level to adjust the water level, and to drain the drainage from deep trenches or underground.

  Moreover, since the drainage device has a simple configuration, the manufacturing cost and the installation cost can be kept low. Furthermore, the drainage inlet can be opened and closed only by moving the first inner cylinder up and down or rotating in the circumferential direction, and the height adjustment of the tabular water inlet only needs to move the second inner cylinder up and down. This is also easy.

  A second invention is dependent on the first invention, and includes a first water stop member that is in close contact with the inner peripheral surface of the outer cylinder and the outer peripheral surface of the first inner cylinder, and the inner peripheral surface of the first inner cylinder and the first inner cylinder. The 2nd water stop member closely_contact | adhered with each of the outer peripheral surface of 2 inner cylinders is provided.

  In the second invention, the first water stop member is a rubber ring formed of, for example, synthetic rubber, and is in close contact with each of the inner peripheral surface of the outer cylinder and the outer peripheral surface of the first inner cylinder. Ensure water stop. Similarly, the second water stop member is a rubber ring formed of, for example, synthetic rubber, and is in close contact with each of the inner peripheral surface of the first inner cylinder and the outer peripheral surface of the second inner cylinder. Ensure wateriness.

  According to the second aspect of the present invention, it is possible to prevent water from entering the drainage device from the gap between the outer cylinder and the first inner cylinder and the gap between the first inner cylinder and the second inner cylinder. .

  A third invention is dependent on the first or second invention, and is provided at least on the outer peripheral surface of the lower end portion of the first inner cylinder or the lower inner surface of the outer cylinder, and when the drainage inlet is closed by the first inner cylinder And a third water stop member that stops water entering the outer cylinder from the drainage inlet.

  In the third invention, the third water stop member is a belt-like body formed of, for example, sponge rubber or the like, and is provided at least on the outer peripheral surface of the lower end portion of the first inner cylinder or the lower inner surface of the outer cylinder. The third water stop member closes the gap between the opening edge of the drainage inlet and the outer peripheral surface of the lower end of the first inner cylinder when the drainage inlet is closed by the first inner cylinder during flooding. .

  According to the third aspect of the present invention, when the surface water is drained and the water level is adjusted during flooding, water can be reliably prevented from entering the outer cylinder from the drainage inlet.

  The fourth invention is dependent on any one of the first to third inventions, and the inside of the first inner cylinder communicates with the discharge port in a state where the lower end portion of the first inner cylinder closes the drainage inlet. .

  In the fourth invention, the lower end portion of the first inner cylinder is formed in, for example, a wedge shape that is cut obliquely from one side surface, and when the drainage inlet is closed by the lower end portion of the first inner cylinder, The inside of 1 inner cylinder will be in the state connected with the discharge port of an outer cylinder.

  A fifth invention is dependent on any one of the first to fourth inventions, further comprising a first protrusion formed on an inner peripheral surface of the first inner cylinder and locking the lower end of the second inner cylinder, The lower end portion of the second inner cylinder is formed such that its axial length differs in the circumferential direction.

  In 5th invention, the 1st projection part which latches the lower end of a 2nd inner cylinder is formed in the internal peripheral surface of a 1st inner cylinder. Further, the lower end portion of the second inner cylinder is formed such that the length from the lower end to the upper end (the axial length of the lower end portion itself) differs in the circumferential direction. As a result, when the second inner cylinder is moved up and down, the second inner cylinder is moved up and down while rotating in the circumferential direction, so that the second inner cylinder can be moved into the first projecting portion of the first inner cylinder at any height position. It becomes possible to make it the state which latched the lower end of the pipe | tube.

  According to the fifth aspect of the present invention, it is possible to reliably prevent unintentional lowering of the second inner cylinder.

  6th invention is dependent on 5th invention, and the lower end of the 2nd inner cylinder is formed in step shape.

  In the sixth invention, the lower end of the second inner cylinder is formed stepwise. As a result, the lower end of the second inner cylinder and the projecting portion come into surface contact in the horizontal direction, and even when a large force acts downward on the second inner cylinder, the second inner cylinder is rotating. It is prevented from descending.

  According to the sixth aspect of the present invention, it is possible to more reliably prevent unintentional lowering of the second inner cylinder.

  A seventh invention is dependent on any one of the first to sixth inventions, and is formed on the outer circumferential surface of the lower end portion of the first inner cylinder and extending in the vertical direction, and on the inner circumferential surface of the outer cylinder. And a second protrusion that fits into the keyway.

  In the seventh invention, a key groove which is a groove extending in the vertical direction is formed on the outer peripheral surface of the lower end portion of the first inner cylinder. Moreover, the 2nd protrusion part fitted to the keyway of a 1st inner cylinder is formed in the outer peripheral surface of an outer cylinder.

  According to the seventh aspect, the first inner cylinder is prevented from rotating by the fitting of the key groove and the second protrusion, and the first inner cylinder is reliably positioned in the circumferential direction.

  An eighth invention is dependent on any one of the first to seventh inventions, and connects the upper end of the outer cylinder and the upper end of the first inner cylinder to prevent the first inner cylinder from coming off from the outer cylinder. A retaining member is further provided.

  In an eighth aspect of the present invention, a retaining member such as a chain for connecting the upper end portion of the outer cylinder and the upper end portion of the first inner cylinder is further provided. Thereby, it is possible to prevent the first inner cylinder from coming off from the outer cylinder.

  A ninth invention is dependent on any one of the first to eighth inventions, and further includes a dust removal filter provided at the drainage inlet.

  In the ninth invention, a dust removal filter is provided at the drain inlet of the outer cylinder. Thereby, it is possible to prevent trash mixed with deep ditch water or underground water from flowing out into the drainage channel.

  A tenth invention is according to the ninth invention, wherein the dust removal filter is formed in a cylindrical shape having a plurality of holes in the side wall, one end portion is connected to the drainage inlet, and the other end portion is connected between the inner walls. Is closed so that it touches.

  In the tenth invention, the dust removal filter is a cylindrical body having a plurality of holes in the side wall, and one end thereof is connected to the drainage inlet. The other end of the dust removal filter is closed so that the inner walls thereof are in contact with each other.

  According to the tenth invention, since the contact area between the dust removal filter and the underground water or deep groove water can be increased, the discharge performance of the underground water or deep groove water (the underground water or deep groove from the drainage inlet) Water inflow performance).

  The eleventh invention is dependent on any one of the first to eighth inventions, and the drainage inlet is connected to a culvert tube or bullet culvert buried in the ground.

  In the eleventh invention, a drainage pipe formed in the outer cylinder is connected to a culvert tube or bullet culvert such as a perforated drainage pipe buried in the ground.

  According to the eleventh aspect, since drainage can be efficiently collected from the entire field, the drainage performance can be further improved.

  According to this invention, by opening and closing the drainage inlet using the first inner cylinder, it is possible to control whether or not drainage from the deep groove or underground is possible, and adjusting the height of the surface water inlet using the second inner cylinder By doing so, the water level of the surface water can be adjusted. That is, with a simple configuration in which the drainage device has a triple cylinder structure, it is possible to drain the surface water above the set water level to adjust the water level, and to drain the drainage from deep trenches or underground.

  Further, since the configuration is simple, the manufacturing cost and the installation cost can be reduced. Furthermore, the drainage inlet can be opened and closed only by moving the first inner cylinder up and down or rotating in the circumferential direction, and the height adjustment of the tabular water inlet only needs to move the second inner cylinder up and down. This is also easy.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is an illustration figure which shows a mode that the drainage apparatus which is one Example of this invention was installed in the agricultural field. It is an illustration figure which shows the external appearance of the drainage device of FIG. It is sectional drawing which shows the drainage device of FIG. It is sectional drawing which shows the outer cylinder with which the drainage apparatus of FIG. 1 is provided. It is sectional drawing which shows the 1st inner cylinder with which the drainage apparatus of FIG. 1 is provided. It is sectional drawing which shows the 2nd inner cylinder with which the drainage apparatus of FIG. 1 is provided. It is an illustration figure which shows a mode when the water level adjustment of the surface water is performed using the drainage device of FIG. It is an illustration figure which shows a mode when draining the drainage from a deep ditch or underground using the drainage device of FIG. In the drainage device which is other examples of this invention, it is an illustration figure showing the state where the 2nd inner cylinder is located in the lowest position. FIG. 10 is an illustrative view showing a state in which the second inner cylinder is located at the uppermost position in the drainage device of FIG. 9. It is sectional drawing which shows the further another Example of the drainage apparatus of this invention. It is sectional drawing which shows the further another Example of the drainage apparatus of this invention. It is sectional drawing which shows the further another Example of the drainage apparatus of this invention. It is sectional drawing which shows the cross section in the XIV-XIV line of the drainage device of FIG. It is a perspective view which shows the external appearance of the 1st inner cylinder with which the drainage apparatus of FIG. 13 is provided. It is sectional drawing which shows the further another Example of the drainage apparatus of this invention.

  Referring to FIG. 1, a drainage device 10 according to an embodiment of the present invention includes an outer cylinder 12, a first inner cylinder 14, and a second inner cylinder 16, and is used by being embedded in a field 100 or the like that performs field rotation. Is done. During flooding, that is, when the field 100 is used as a paddy field, the surface water above the set water level is drained and the water level is adjusted, and when it is dry, that is, when the field 100 is dried and used as a field, deep grooves Drain water or underground water. However, the drainage device 10 is appropriately used not only in the field 100 that performs field rotation every few years, but also in a field that performs a reverse cropping in the winter season, or a field that has a time to simply drain water to make a dry rice field.

  Hereinafter, the configuration of the drainage device 10 will be described in detail with reference to FIGS. As shown in FIGS. 2 and 3, the drainage device 10 is formed of a synthetic resin such as hard vinyl chloride. The drainage device 10 includes a vertical tubular outer cylinder 12, a first inner cylinder 14 that can be moved up and down with respect to the outer cylinder 12, and a second that can be moved up and down with respect to the first inner cylinder 14. A triple cylinder structure including the inner cylinder 16 is provided. As will be described in detail later, the first inner cylinder 14 can open and close the drainage inlet 20 formed in the outer cylinder 12 by moving up and down, and the second inner cylinder 16 can move up and down by moving up and down. The height position of the rice field water inlet 42 formed at the upper end can be changed. Note that the upper ends of the first inner cylinder 14 and the second inner cylinder protrude from the upper ends of the outer cylinder 12 and the first inner cylinder 14 at their lowest positions. The vertical length (height) of the drainage device 10 in a state where the first inner cylinder 14 and the second inner cylinder 16 are at the lowest position is, for example, 420 mm.

  As shown in FIG. 4, the outer cylinder 12 is formed in a bottomed vertical tube with an open top, including a side wall 12 a formed in a substantially cylindrical shape and a bottom wall 12 b provided at the lower end thereof. Moreover, the drainage inlet 20 and the discharge port 22 are formed in the lower end part of the side wall 12a in the position which mutually opposes. The inner diameters of the drainage inlet 20 and the outlet 22 are, for example, 150 mm.

  The drainage inlet 20 is an opening for allowing drainage from a deep groove or underground formed in the farm field 100 to flow into the outer cylinder 12, and is formed in a short tube projecting laterally from the lower end of the side wall 12a. . On the other hand, the discharge port 22 is an opening for discharging water that has flowed into the outer pipe 12 to the outside, and is also used as a connection part with a drain pipe 106 (see FIG. 1) extending to the drain path 104, It is formed in a short tubular shape that projects laterally from the lower end of 12a.

  In this embodiment, the lower end portion of the side wall 12 a is formed in a horizontal tubular shape, and both end portions of the horizontal tubular portion are used as the drainage inlet 20 and the discharge port 22. Further, the central bottom portion of the horizontal tubular portion becomes the bottom wall 12 b of the outer cylinder 12. In addition, since the basic structure of such an outer cylinder 12 can be formed only by connecting a general-purpose straight pipe to a general-purpose cheese joint (90 ° Y), the manufacturing cost of the drainage device 10 can be suppressed. .

  Further, an annular groove 24 extending in the circumferential direction is formed on the inner peripheral surface of the upper end portion of the side wall 12a of the outer cylinder 12, and a first ring such as a rubber ring formed of synthetic rubber or elastomer is formed in the annular groove 24. The water stop member 26 is attached. The first water stop member 26 is formed in an annular shape extending over the entire length of the annular groove 24, and each of the inner surface of the annular groove 24 (that is, the inner peripheral surface of the outer cylinder 12) and the outer peripheral surface of the first inner cylinder 14. To ensure water-stopping during this period. Furthermore, a protrusion (second protrusion) 28 that fits into a key groove 30 of the first inner cylinder 14 to be described later is formed on the inner peripheral surface of the side wall 12a. The protrusion 28 is a protrusion having a substantially rectangular parallelepiped shape or a semispherical shape, and is formed above the drainage inlet 20. However, the formation position of the protrusion 28 is not limited to this, and can be appropriately changed according to the formation position of the key groove 30.

  As shown in FIG. 5, the first inner cylinder 14 is formed in a cylindrical shape with both ends open. The lower end portion 14a of the first inner cylinder 14 is formed in a wedge shape that is cut out obliquely from one side surface. That is, the opening 14 b at the lower end of the first inner cylinder 14 opens obliquely downward toward the discharge port 22 of the outer cylinder 12, and the lower end portion 14 a of the first inner cylinder 14 closes the drainage inlet 20. Thus, the inside of the first inner cylinder 14 communicates with the discharge port 22 (see FIG. 3).

  On the outer peripheral surface of the first inner cylinder 14, a key groove 30 that fits with the protrusion 28 of the outer cylinder 12 is formed. The key groove 30 is a groove extending in the vertical direction and formed on the longest side of the lower end portion 14a. The first inner cylinder 14 is moved up and down with the protrusions 28 fitted in the key grooves 30 to position the first inner cylinder 14 in the circumferential direction (rotation in the circumferential direction is prevented). The longest portion of the lower end portion 14a of the inner cylinder 14 and the central portion of the drainage inlet 20 of the outer cylinder 12 can be reliably aligned. Although not shown, a locking groove that branches off in the lateral direction is formed at the lower end of the key groove 30. When the first inner cylinder 14 is raised, the first inner cylinder 14 may be slightly rotated in the circumferential direction to fit the locking groove and the protrusion 28, and the protrusion 28 is locked by the locking groove. The first inner cylinder 14 can be held in the raised position by the close contact force (resistance force) of the first water stop member 26, but the first inner cylinder 14 can be secured by locking the protruding portion 28 by the locking groove of the key groove 30. Unintentional lowering of the inner cylinder 14 can be reliably prevented.

  Further, a protrusion (first protrusion) 32 that locks the lower end of the second inner cylinder 16 is formed on the inner peripheral surface of the first inner cylinder 14. The protrusion 32 is a protrusion having a substantially rectangular parallelepiped shape and is formed at a position above the upper end edge of the opening 14b. In this embodiment, the projecting portion 32 defines the lowest position of the second inner cylinder 16 and reliably prevents the second inner cylinder 16 from entering the first inner cylinder 14.

  Further, an annular groove 34 extending in the circumferential direction is formed on the inner peripheral surface of the upper end portion of the first inner cylinder 14, and a second water stop such as a rubber ring formed of synthetic rubber or elastomer is formed in the annular groove 34. A member 36 is mounted. The second water stop member 36 is formed in an annular shape extending over the entire length of the annular groove 34, and the inner surface of the annular groove 34 (that is, the inner peripheral surface of the first inner cylinder 14) and the outer peripheral surface of the second inner cylinder 16. In close contact with each of these, to ensure water-stopping during this period. Moreover, the 2nd water stop member 36 functions also as a holding member which hold | maintains the 2nd inner cylinder 16 in a desired height position with the contact | adherence force (resistance force).

  Further, a flange portion 38 that is an annular protrusion protruding outward is formed on the outer peripheral surface of the upper end portion of the first inner cylinder 14. The collar portion 38 is used as a grip portion when the first inner cylinder 14 is moved up and down.

  Furthermore, a third water stop member 40 is provided at the lower end portion 14 a of the first inner cylinder 14. The third water stop member 40 is a band-shaped body formed of sponge rubber or the like, and is provided in the lower half portion of the lower end surface of the first inner cylinder 14 and vertically on the outer peripheral surface of the lower end portion 14a. It extends in the 1st inner cylinder 14 so that the outer peripheral surface half peripheral part by the side of the discharge port 22 may be extended along the upper end of the lower end part 14a. The third water stop member 40 is configured so that the drain inlet 20 is in a state where the first inner cylinder 14 is located at the lowest position (the drain inlet 20 is closed by the lower end portion 14a of the first inner cylinder 14). The gap formed between the opening edge of the first inner cylinder 14 and the outer peripheral surface of the lower end portion 14a of the first inner cylinder 14 is closed, and water entering the outer cylinder 12 from the drainage inlet 20 is stopped.

  The third water stop member 40 may be simply attached to the first inner cylinder 14, but a shallow groove is formed at a position where the third water stop member 40 is provided, and is fitted into the shallow groove. The 3rd water stop member 40 can also be provided. Further, the position where the third water stop member 40 is provided is not limited to the mode shown in FIG. For example, the third water stop member 40 may be provided at an annular position on the outer peripheral surface of the lower end portion 14 a of the first inner cylinder 14 and facing the opening edge of the drainage inlet 20. Moreover, the 3rd water stop member 40 can also be provided in the inner surface side of the outer cylinder 12. FIG.

  As shown in FIG. 6, the second inner cylinder 16 is formed in a cylindrical shape with both ends open. The opening at the upper end of the second inner cylinder 16 functions as a rice field water inlet 42 for allowing excess field water supplied to the farm field 100 to flow into the outer cylinder 12. The length of the first inner cylinder 16 in the vertical direction is, for example, 220 mm, and the inner diameter thereof is, for example, 130 mm. A substantially C-shaped handle 44 is attached to the upper end portion of the second inner cylinder 16. The handle 44 is rotatable with respect to the second inner cylinder 16 with both ends thereof as fulcrums.

  As shown in FIGS. 2 and 3, the upper end portion of the outer cylinder 12 and the upper end portion (the flange portion 38) of the first inner cylinder 14 are connected by a retaining member 46 that is a linear body such as a chain. . The retaining member 46 has a length that allows a slight margin when the first inner cylinder 14 is raised and the drainage inlet 20 is opened, and prevents the first inner cylinder 14 from coming off from the outer cylinder 12. .

As shown in FIG. 1, such a drainage device 10 is used by being embedded in a farm field 100 or the like. For example, the drainage device 10 is provided in the farm field 100 at a ratio of arranging one drainage device 10 with respect to a field area of 2000-4000 m ² . Specifically, in order not to reduce the planting area of the farm field 100, a part of the shore 102 on the farm field 100 side is excavated, and the drainage device 10 is embedded therein. At this time, the drainage device 10 is embedded so that the upper end of the second inner cylinder 16 is substantially flush with the ground surface of the farm field 100 when the first inner cylinder 14 and the second inner cylinder 16 are in the lowest position. The In addition, a drain pipe 106 extending to the drainage channel 104 is connected to the discharge port 22 by adhesive bonding or rubber ring bonding, and the drainage inlet 20 is arranged in the ground as it is.

  During flooding, as shown in FIG. 7, with the first inner cylinder 14 in the lowest position, the drainage inlet 20 is closed at the lower end portion 14a of the first inner cylinder 14, and the second inner cylinder 16 The position of the second inner cylinder 16 is adjusted by raising the second inner cylinder 16 so that the upper end, that is, the surface water inlet 42 is positioned at the desired water level of the surface water. At this time, the second inner cylinder 16 is fixed and held at a desired height position by the second water stop member 34. When water is supplied to the field 100 in such a state, after the water level of the surface water reaches the height position of the surface water inlet 42 of the second inner cylinder 16, surplus water above the set water level is It flows into the outer cylinder 12 (drainage device 10) from the inlet 42 and is discharged from the discharge port 22. Then, it is conveyed to the drainage channel 104 through the discharge pipe 106. As a result, the water level of the rice field water in the field 100 is maintained at the height position of the rice field water inlet 42 of the second inner cylinder 16. In this embodiment, by moving the second inner cylinder 16 up and down, it is possible to adjust the height position of the surface water inlet 42, that is, the water level of the surface water between 0 and 170 mm.

  On the other hand, at the time of dry paddy, as shown in FIG. 8, the first inner cylinder 14 is raised to open the drainage inlet 20 of the outer cylinder 12. At this time, the first inner cylinder 14 is fixedly held at the raised position by being slightly rotated in the circumferential direction and fitting the locking groove formed in the key groove 30 with the protrusion 28 of the outer cylinder 12. . Note that the second inner cylinder 16 rises as the first inner cylinder 14 rises. When the drainage inlet 20 is opened, surplus underground water (or deep groove water) flows into the outer cylinder 12 from the drainage inlet 20 and is discharged from the outlet 22. Then, it is conveyed to the drainage channel 104 through the discharge pipe 106. As a result, the agricultural field 100 can be in a dry rice field and can suitably perform field cropping.

  According to this embodiment, by opening and closing the drainage inlet 20 using the first inner cylinder 14, it is possible to control whether or not drainage from deep grooves or underground is possible, and using the second inner cylinder 16, the surface water inlet 42. By adjusting the height of the water, the water level of the surface water can be adjusted. That is, with a simple configuration in which the drainage device 10 has a triple cylinder structure, it is possible to drain the surface water above the set water level and adjust the water level, and to drain the drainage from deep grooves or underground.

  Moreover, since the drainage device 10 has a simple configuration, the manufacturing cost and the installation cost can be reduced. Furthermore, the opening and closing of the drainage inlet 20 or the height adjustment of the surface water inlet 42 only needs to move the first inner cylinder 14 or the second inner cylinder 16 up and down from the ground, so that the work after installation is easy. .

  Furthermore, since the drainage inlet 20 is provided at the same height as the outlet 22, the drainage device 10 can be reduced in height, and it is possible to cope with a case where the drainage drain 104 is shallow. That is, the present invention can also be suitably used for a small-scale farm field 100 where infrastructure maintenance such as effluent separation is not sufficiently performed.

  In addition, in the above-mentioned Example, although the drainage inflow port 20 was arrange | positioned in the ground as it is, it is not limited to this. For example, the drainage inlet 20 may be connected to a downstream end portion such as a perforated drainage pipe or a bullet culvert provided in the ground of the farm field 100 or a deep groove provided in the farm field 100. You may make it arrange | position at the bottom part of a downstream end part. In this way, when connecting the drainage inlet 20 with a culvert tube, bullet culvert or deep groove, etc., the cost increases by laying the culvert tube or the like, but efficiently collecting drainage from the entire field 100. Therefore, drainage performance can be further improved.

  In the above-described embodiment, the drainage inlet 20 and the outlet 22 are provided at positions facing each other, that is, at a position shifted by 180 ° in the circumferential direction. However, the positional relationship in the circumferential direction between the drain inlet 20 and the outlet 22 is not particularly limited, and the drain inlet 20 and the outlet 22 are provided at positions shifted by an appropriate angle such as 90 ° or 120 °. You can also. Further, the drainage inlet 20 can be formed at a position higher than the outlet 22.

  Moreover, in the above-mentioned Example, although the drainage inflow port 20 is formed in the short tube shape, the shape of the drainage inflow port 20 can be changed suitably. For example, the drainage inlet 20 may be a simple opening formed in the side wall 12 a of the outer cylinder 12. Further, the shape of the discharge port 22 can be changed as appropriate as long as it can be connected to the drain pipe 106 in a watertight manner. For example, the discharge port 22 may have a shape of a slot instead of a shape of a receiving port.

  Furthermore, in the above-described embodiment, the second inner cylinder 16 is formed in a cylindrical shape in which the upper end surface and the lower end surface are parallel, but the present invention is not limited to this. For example, as in the embodiment shown in FIGS. 9 and 10, the lower end portion 16a of the second inner cylinder 16 can be formed in a wedge shape that is cut out obliquely from one side surface. That is, in the embodiment shown in FIGS. 9 and 10, the lower end portion 16a of the second inner cylinder 16 has a length from the lower end 16b to the upper end 16c (that is, the axial length of the lower end portion 16a itself) in the circumferential direction. Are formed differently. As a result, when the second inner cylinder 16 is moved up and down, the protrusion (first portion) of the first inner cylinder 14 is moved at any height position by moving the second inner cylinder 16 up and down while rotating in the circumferential direction. Since the lower end of the lower end portion 16b (that is, the lower end of the second inner cylinder 16) 16b can be locked (abutted) on the protrusion 32), the second inner cylinder 16 is unintentionally lowered. It can be surely prevented. That is, in the embodiment shown in FIGS. 9 and 10, the protrusion 32 not only prevents the second inner cylinder 16 from entering the first inner cylinder 14 but also raises the second inner cylinder 16 to a desired height. It also functions as a holding portion that is locked and held in position.

  Further, as in the embodiment shown in FIG. 11, the lower end 16b of the second inner cylinder 16 is formed in a step shape so that the axial length of the lower end portion 16a of the second inner cylinder 16 is different in the circumferential direction. You can also In the embodiment shown in FIGS. 9 and 10, since the lower end 16 b of the second inner cylinder 16 is formed in a slope shape, when a large force acts downward on the second inner cylinder 16, There is a possibility that the lower end 16b of the second inner cylinder 16 slides on the protrusion 32 and the second inner cylinder 16 descends while rotating. On the other hand, in the embodiment shown in FIG. 11, the lower end 16b of the second inner cylinder 16 is formed in a step shape, so that the lower end 16b of the second inner cylinder 16 and the protrusion 32 are in surface contact in the horizontal direction. Thus, when a large downward force is applied to the second inner cylinder 16, the second inner cylinder 16 is prevented from descending while rotating. Therefore, according to the embodiment shown in FIG. 11, the unintentional lowering of the second inner cylinder 16 can be prevented more reliably.

  Furthermore, in each of the above-described embodiments, the lower end portion 14a of the first inner cylinder 14 is formed in a wedge shape, but the shape of the lower end portion 14a of the first inner cylinder 14 can be changed as appropriate. For example, as in the embodiment shown in FIG. 12, the lower end portion 14 a of the first inner cylinder 14 is formed to be curved toward the discharge port 22, and the lower end portion 14 a of the first inner cylinder 14 is changed to the surface water inlet. You may make it function as a guide part for guiding the surface water which flows down from 42 in the perpendicular direction to the discharge port 22. Thereby, the surface water flowing in from the surface water inlet 42 can be smoothly discharged from the outlet 22. The third water stop member 40 in this case extends up and down the outer peripheral surface of the lower end portion 14a after extending the outer peripheral surface half peripheral portion on the drainage inlet 20 side along the upper end of the lower end portion 14a of the first inner cylinder 14. The first inner cylinder 14 is provided so as to extend in an arc shape in the direction.

  Further, in each of the above-described embodiments, the drain inlet 20 of the outer cylinder 12 is opened and closed by moving the first inner cylinder 14 up and down. However, as in the embodiments shown in FIGS. A configuration in which the drainage inlet 20 of the outer cylinder 12 is opened and closed by rotating the inner cylinder 14 in the circumferential direction can also be adopted. Hereinafter, an example of a type in which the first inner cylinder 14 is rotated will be described with reference to FIG. 13 and FIG. 14, but description of the same parts as those of the above-described examples will be omitted or simplified.

  As shown in FIG. 13 and FIG. 14, the outer cylinder 12 is formed in a bottomed vertical tube having an open upper end, including a side wall 12 a formed in a cylindrical shape and a flat bottom wall 12 b provided at the lower end thereof. . At the lower end of the side wall 12a, a short cylindrical drainage inlet 20 and an outlet 22 are formed at positions facing each other. Further, a fitting hole 12c having a columnar shape, a square shape or a cross shape is formed on the upper surface side of the bottom wall 12b.

  With reference to FIG. 15 together with FIGS. 13 and 14, the first inner cylinder 14 has a cylindrical side wall. In the lower end portion 14a of the first inner cylinder 14, an inlet 14c and an outlet 14d are formed at positions corresponding to the drainage inlet 20 and the outlet 22 of the outer cylinder 12, respectively. The first inner cylinder 14 is provided with a bottom wall 14e having an invert to connect the inflow port 14c and the outflow port 14d. A columnar, square or cross-shaped projection 14f that fits into the fitting hole 12c of the outer cylinder 12 is provided on the lower surface side of the bottom wall 14e, and the fitting hole 12c and the projection 14f are fitted. Thus, the first inner cylinder 14 is positioned. If the fitting hole 12c and the protrusion 14f are formed in a square shape or a cross shape, the first inner cylinder 14 can be prevented from rotating.

  Furthermore, the 3rd water stop member 40 is provided in the outer peripheral surface of the lower end part 14a of the 1st inner cylinder 14. As shown in FIG. In this embodiment, the third water stop member 40 extends over the entire length in the circumferential direction along the upper and lower ends of the lower end portion 14a (that is, so as to connect the upper and lower edges of the inlet 14c and outlet 14d). The first inner cylinder 14 is provided so as to extend in the vertical direction on both sides of the inlet 14c and the outlet 14 respectively.

  In the embodiment shown in FIGS. 13 and 14, during flooding, the positions of the inlet 14 c and outlet 14 d of the first inner cylinder 14 are set 90 in the circumferential direction from the positions of the drain inlet 20 and outlet 22 of the outer cylinder 12. The drainage inlet 20 is closed at the lower end portion 14 a of the first inner cylinder 14 at a position shifted by °. And in this state, the 2nd inner cylinder 16 is raised and the position is adjusted so that the upper end of the 2nd inner cylinder 16, ie, the surface water inlet 42, may come to the height position of the desired water level of the surface water.

  On the other hand, during flooding, the first inner cylinder 14 is rotated 90 ° in the circumferential direction, and the positions of the inlet 14c and outlet 14d of the first inner cylinder 14 and the drain inlet 20 and outlet 22 of the outer cylinder 12 are set. Match the position. Thereby, underground water (or deep groove water) flows into the outer cylinder 12 from the drainage inlet 20 and is discharged from the outlet 22.

  In the embodiment shown in FIG. 13 and FIG. 14 as well, the drainage device 10 can be drained from the deep ditch or underground while being able to drain the surface water by adjusting the water level with a simple structure of a triple cylinder structure. . Further, the drain inlet 20 can be opened and closed only by rotating the first inner cylinder 14 in the circumferential direction, and the height adjustment of the tabular water inlet 42 only needs to move the second inner cylinder 16 up and down. Subsequent work is also easy.

  Moreover, in the Example shown in FIG. 13 and FIG. 14, underground drainage from the drainage inflow port 20 can also be performed simultaneously while performing surface drainage from the surface water inlet 42. Of course, in the embodiment shown in FIG. 2 or the like that opens and closes the drainage inlet 20 of the outer cylinder 12 by moving the first inner cylinder 14 up and down, it is possible to perform simultaneous drainage from the ground surface and underground. However, in this embodiment of the vertical movement type, the water level adjustable range of the surface water during simultaneous drainage moves upward. In this respect, in the embodiment shown in FIGS. 13 and 14 in which the drainage inlet 20 of the outer cylinder 12 is opened and closed by rotating the first inner cylinder 14 in the circumferential direction, the water level adjustment of the surface water is performed even during simultaneous drainage. Since the possible range does not change, it is suitable for simultaneous drainage from the surface and underground.

  In the embodiment shown in FIGS. 13 and 14, the inlet 14 c and the outlet 14 d are formed in the lower end portion 14 a of the first inner cylinder 14, but as in each embodiment shown in FIG. The lower end portion 14a of the first inner cylinder 14 can also be formed in a wedge shape that is cut out obliquely from one side surface.

  Furthermore, as another embodiment, a dust removal filter 50 for preventing the inflow of dust into the outer cylinder 12 can be provided at the drainage inlet 20 of the outer cylinder 12. For example, as shown in FIG. 16, the dust removal filter 50 is a cylindrical body having a plurality of holes in the side wall, and one end thereof is connected to the drainage inlet 20 by adhesive bonding or the like. Further, the other end of the dust removal filter 50 is closed by fusing or the like so that the inner walls thereof are in contact with each other.

  According to the embodiment shown in FIG. 16, since the dust removal filter 50 is provided at the drainage inlet 20 of the outer cylinder 12, it is possible to prevent the dust mixed with deep groove water and underground water from flowing out into the drainage channel 104. Further, by forming the dust removal filter 50 in a shape as shown in FIG. 16, the contact area between the dust removal filter 50 and the underground water or the deep groove water can be increased, and the discharge of the underground water or the deep groove water can be performed. Performance (inflow performance of underground water or deep groove water from the drainage inlet 20 into the outer cylinder 12) can be ensured.

  However, the shape of the dust removal filter 50 is not particularly limited. For example, the dust removal filter 50 can be simply formed in a flat plate shape that covers the drainage inlet 20, or the dust removal filter 50 is formed in a cylindrical shape and has one end thereof. Can be connected to the drainage inlet 20, and the other end can be sealed with a cap or the like.

  It should be noted that the specific numerical values such as the dimensions mentioned above are merely examples, and can be appropriately changed according to the needs of product specifications and the like.

DESCRIPTION OF SYMBOLS 10 ... Drainage device 12 ... Outer cylinder 14 ... 1st inner cylinder 16 ... 2nd inner cylinder 20 ... Drainage inlet 22 ... Discharge port 26 ... 1st water stop member 28 ... 2nd projection part 30 ... Keyway 32 ... 1st Projection part 36 ... 2nd water stop member 40 ... 3rd water stop member 42 ... Taba surface water inflow port 46 ... Detaching member 50 ... Garbage removal filter 100 ... Farm field 102 ... Bank side 104 ... Drainage

Claims (11)

It is a drainage device that drains the surface water above the set water level when flooding and adjusts the water level, and drains the drainage from deep trenches or underground when it is dry.
An outer cylinder formed in a bottomed vertical tube with an open upper end and having a drainage inlet and a discharge outlet formed at the lower end of the side wall;
A first inner cylinder fitted into the outer cylinder and capable of opening and closing the drainage inlet by moving up and down or rotating in the circumferential direction; and a surface water inlet formed at an upper end portion; A drainage device comprising a second inner cylinder that is fitted in a cylinder and can move up and down to change the height position of the surface water inlet. A first water stop member that is in close contact with each of the inner peripheral surface of the outer cylinder and the outer peripheral surface of the first inner cylinder; and The drainage device according to claim 1, further comprising a second water stop member.   Provided at least on the outer peripheral surface of the lower end of the first inner cylinder or the lower inner surface of the outer cylinder, and enters the outer cylinder from the drainage inlet when the drainage inlet is closed by the first inner cylinder. The drainage device according to claim 1 or 2, further comprising a third water stop member for stopping water.   The drainage device according to any one of claims 1 to 3, wherein the inside of the first inner cylinder communicates with the discharge port in a state where the lower end portion of the first inner cylinder closes the drainage inlet. A first protrusion formed on the inner peripheral surface of the first inner cylinder and locking the lower end of the second inner cylinder;
The drainage device according to any one of claims 1 to 4, wherein the lower end portion of the second inner cylinder is formed such that its axial length differs in the circumferential direction.   The drainage device according to claim 5, wherein a lower end of the second inner cylinder is formed in a step shape. 2. A key groove extending in the vertical direction formed on the outer peripheral surface of the lower end portion of the first inner cylinder, and a second protrusion formed on the inner peripheral surface of the outer cylinder and fitting into the key groove. The drainage device in any one of thru | or 6.   8. The device according to claim 1, further comprising a retaining member that connects an upper end portion of the outer cylinder and an upper end portion of the first inner cylinder and prevents the first inner cylinder from coming off from the outer cylinder. The drainage device described.   The drainage device according to any one of claims 1 to 8, further comprising a dust removal filter provided at the drainage inlet.   The dust removal filter is formed in a cylindrical shape having a plurality of holes on a side wall, one end is connected to the drainage inlet, and the other end is closed so that the inner walls are in contact with each other. The drainage device described.   The drainage device according to any one of claims 1 to 8, wherein a culvert tube or a bullet culvert buried in the ground is connected to the drainage inlet.

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