JP3037421U - Underdrain drainage valve - Google Patents

Abstract

(57) [Abstract] [Problem] To prevent the underdrain drainage valve from interfering with agricultural work. Prevent damage to the underdrain drainage valve due to agricultural equipment. It also prevents deterioration of the underdrain drainage valve due to ultraviolet rays from the sun. SOLUTION: A connecting pipe 46 is fitted and connected to an upper end portion of a standing pipe 45 having an operating rod 62 of a valve body 61 built therein. The lower end of the protection box 52 is connected to the connecting pipe 46. This protection box
In 52, the operation handle 64 is fitted and connected to the upper end of the operation rod 62. A lid 54 made of concrete is provided on the upper end of the protection box 52. At the time of construction, by cutting the standing pipe 45 and the upper part of the operating rod 62 by an appropriate length, the lid 54 is positioned on the same plane as the ridge ground 22a.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a valve for underdrain drainage called, for example, underdrain drainage in a paddy field or a barn used in an underground irrigation facility.

[0002]

[Problems to be solved by the device]

 FIG. 5 shows an example of a conventional underdrain drainage valve 1 of this type. In the figure, 2 is a paddy field, 3 is a ridge of the paddy field, 4 is a drainage channel, 5 is an underdrain collection pipe buried in the ground below the paddy field 2, and 6 is drainage from this collection pipe 5 to the drainage channel 4. It is a tube. The underdrain drainage valve 1 has joint pipes 7 to which the drain pipes 6 are connected at both ends, and a standing pipe 8 rises from an intermediate portion of the joint pipe 7. The standing pipe 8 is exposed to the ground on the ridge 3. Inside the joint pipe 7, a valve body 9 for opening and closing a water channel formed therein is provided so as to be able to move up and down, and an operating rod 11 rising from the valve body 9 passes through the inside of the standing pipe 8 and projects above it. ing. A cap 12 is fitted and attached to the outer peripheral side of the standing pipe 8 at the upper end of the standing pipe 8 exposed on the ground. A tubular portion 13 through which the operating rod 11 penetrates is formed in the central portion of the cap 12, and a fixing ring 14 is screwed onto the tubular portion 13. Further, an operating handle 15 is fixed to the upper end portion of the operating rod 11 protruding upward from the cap 12.

Then, in order to manage wetlands and drylands, the valve body 9 is opened and closed by moving the operating handle 15 up and down on the ground. When the valve 1 for drainage from the underdrain is opened, the underground water under the paddy field 2 is absorbed in the water collection pipe 5, drained through the drainage pipe 6 and the joint pipe 7 into the drainage channel 4, and the conversion to dry field is planned. To be On the other hand, when the main underdrain drainage valve 1 is closed, drainage from the water collection pipe 5 is blocked, so underground water stops below the paddy field 2 and a wetland is achieved.

However, in the above-mentioned conventional underdrain drainage valve 1, the upper end thereof, that is, the upper end of the standing pipe 8 including the cap 12 and the upper end of the operating rod 11 including the operating handle 15 are grounded on the ridge 3. Since it protrudes, the upper end of the underdrain drainage valve 1 interferes with work such as mowing on the ridge 3, and there is a possibility that the underdrain drainage valve 1 may be damaged by agricultural machinery or the like. Further, since the standing tube 8, the cap 12, the operating handle 15 and the like are made of synthetic resin, there is a problem that they are deteriorated by ultraviolet rays of the sun.

The present invention is intended to solve such a problem, does not hinder the work, can prevent damage by agricultural machinery, and can prevent deterioration due to ultraviolet rays. It is intended to provide a valve for underdrain drainage.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned purpose, the underdrain drainage valve according to the invention of claim 1 comprises a joint pipe forming a water passage communicating with the underdrain water collecting pipe, and a valve body provided in the joint pipe for opening and closing the water passage, An operating rod standing up from the valve body, an operating handle provided on the upper end of the operating rod, a standing pipe standing upright from the joint pipe and in which the operating rod is located inside, and a standing pipe provided above the standing pipe. It is provided with a protection box in which the operation handle is located, and a lid for opening and closing the upper opening of the protection box.

As described above, since the operation handle is inside the protective box and the upper opening of the protective box is closed by the lid, only this lid is exposed to the ground and the other parts are buried in the ground. It is possible. This prevents the underdrain drainage valve from interfering with work, damaging the underdrain drainage valve due to agricultural equipment, etc., and preventing deterioration of the materials of the components that make up the underdrain drainage valve due to ultraviolet rays. It To open and close the underdrain drainage valve to control wetlands and drylands, open the lid and open and close the valve with the operating handle. When the underdrain drainage valve is open, underground water below the paddy fields is absorbed in the underdrain water collection pipes and drained through the joint pipes, which results in dry land. On the other hand, when the underdrain drainage valve is closed, the drainage from the underdrain water collection pipe is blocked, so underground water stays below the paddy field, and a wetland is constructed.

According to a second aspect of the present invention, in the underdrain drainage valve of the first aspect of the present invention, the lid body includes a fitting portion that fits into an upper end portion inside the protection box and an upper end surface of the protection box. It has a step portion on which it can be placed and can be arranged on the same plane as the ground.

When the lid is thus fitted into the protective box, the entire protective box can be buried in the ground, which allows the lid to be installed on a ridge or the like. It can be placed on the same surface as the ground. As a result, the underdrain drainage valve can be more reliably prevented from interfering with work, and the underdrain drainage valve from being damaged or deteriorated.

According to a third aspect of the present invention, in the underdrain drainage valve of the second aspect, the material of the lid is concrete or metal.

Even if it is possible to prevent other parts from being exposed to the ground, the lid is exposed to the ground, but if this lid is made of concrete or metal, deterioration due to ultraviolet rays or the like is unlikely to occur.

According to a fourth aspect of the present invention, in the underdrain drainage valve according to any one of the first to third aspects, a standing pipe connecting portion that fits into an upper end portion of the standing pipe is provided in a lower portion, and the protection is provided. The box is provided with a connecting pipe provided on the upper side, the standing pipe is made of synthetic resin, and the fitting surface of the connecting pipe is formed into a pillar shape, and the standing pipe is cut to thereby form the lid body. Can be placed on the same plane as the ground around farmlands such as ridges.

Since the height from the joint pipe communicating with the underdrain water collection pipe to the ground such as a ridge is not constant, in order to position the upper end of the underdrain drainage valve on the ground, as described above, It is necessary to adjust the height of the valve. To adjust this height, cut the standing pipe to an appropriate length, and then fit the standing pipe connection part of the connecting pipe to the upper end of this standing pipe. In this way, the standing pipe is configured to fit into the standing pipe connection, and the fitting surface of the standing pipe to the connecting pipe has a pillar shape, so the standing pipe can be cut at any position. Can be connected to the connecting pipe, and the height of the upper end of the underdrain drainage valve can be adjusted arbitrarily.

A fifth aspect of the present invention is the underdrain drainage valve of the fourth aspect, wherein the operating handle has an operating rod connecting portion into which the operating rod is fitted, and the operating rod is a composite. The height of the operating handle is made of resin and the height of the operating handle can be adjusted by making the fitting surface of the operating handle into a pillar shape and cutting the operating rod.

When adjusting the height, the height of the standing pipe is adjusted, the operating rod is cut into an appropriate length, and the operating rod connecting portion of the operating handle is fitted to the upper end of the operating rod. Suru In this way, the operating rod is configured to fit into the operating rod connecting part, and the fitting surface of the operating rod for fitting the operating handle is in the shape of a pillar, so the operating rod can be placed at any position. It can be cut and connected to the operating handle, and the height of the operating handle can be adjusted arbitrarily.

According to a sixth aspect of the present invention, in the underdrain drainage valve of the fourth or fifth aspect of the invention, there is provided a protective box bottom plate for penetrating the lower surface of the protective box through which the operating rod penetrates, and the protective box bottom plate. And a fixture for fixing the operating rod, and the protective box bottom plate is placed on a step surface formed in the connection pipe.

When the protection box bottom plate is placed on the step surface in the connecting pipe in this way, the protection box bottom plate is securely supported together with the protection box, and the operating rod is fixed by the fixture provided on the protection box bottom plate. Will also be certain.

[0018]

[Embodiment of the invention]

 An embodiment of the underdrain drainage valve of the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, 21 is a paddy field, 22 is a ridge, 23 is a ridge or an agricultural road shoulder, 24 is a subterranean under the paddy 21, and 25 is a drainage flume. An underdrain water collection pipe 26 is buried at a depth of about 1 m in the ground 24 under the paddy field 21. A plurality of the water collecting pipes 26 are spliced together. Further, one end of the water collection pipe 26 is widened to form a receiving port 27, and the other end of the adjacent water collection pipe 26 is inserted into the receiving port 27. A gap for water passage is formed in the portion. Along with this, a plurality of water passage holes 28 are also formed in the peripheral wall portion of the water collection pipe 26. Also, 29 is a 90 ° bent riser pipe, and one end of this riser pipe 29 is connected to the receiving port 27 of the water collection pipe 26, and the other end is exposed on the ridge or the ground of the agricultural road shoulder 23. There is. The opening at the other end of the rising pipe 29 is closed by a screw cap 30 so as to be opened. A pipe line 31 embedded in the ridge or the shoulder 23 of the agricultural road is connected to the upper portion of the rising pipe 29. This pipeline 31 is for water guiding from the water ditches. Further, drainage pipes 32 and 33 are buried in the ground 24 between the water collection pipe 26 and the drainage flume 25.

In addition, an underdrain drainage valve (water lock) 41 is provided in the drainage pipes 32 and 33 so as to be buried in the ground 24. Next, the configuration of the underdrain drainage valve 41 will be described in detail. 42 is a joint pipe made of a synthetic resin such as hard vinyl chloride. This joint pipe 42 is almost T-shaped, has drain pipe connecting portions 43 on both sides, and has a middle portion between them. A cylindrical standing pipe connecting portion 44 is provided on the upper side. Then, the drain pipes 32 and 33 are fitted and connected in the both drain pipe connecting portions 43, respectively, so that a water passage communicating from the water collecting pipe 26 to the drain flume 25 is formed. In this embodiment, the drain pipes 32 and 33 are connected to the inside of the drain pipe connecting portion 43, but conversely, the drain pipes may be connected to the outside of the drain pipe connecting portion. Further, the lower end portion of the standing pipe 45 is fitted into the standing pipe connecting portion 44 and fixed by an adhesive. The standing pipe 45 is made of synthetic resin such as hard vinyl chloride that is relatively easy to cut, and has a vertical cylindrical shape.

Reference numeral 46 denotes a connecting pipe made of synthetic resin such as hard vinyl chloride. The connecting pipe 46 has a tapered middle portion and has a vertical cylindrical standing pipe connecting portion 47 at the bottom. In addition, a vertical cylindrical protective box connecting portion 48 having a larger diameter than the standing pipe connecting portion 47 is provided at the upper part. An upward step surface 49 is formed at the lower end of the protective box connecting portion 48. The upper end of the standing pipe 45 is fitted into the standing pipe connecting portion 47 and fixed by an adhesive.

Reference numeral 51 is a protective box made of synthetic resin such as hard vinyl chloride. The protective box 51 has a vertical cylindrical shape, and the lower end portion is fitted into the protective box connecting portion 48 of the connecting pipe 46. They are combined and fixed with an adhesive. 52 is a disc-shaped protective box bottom plate made of synthetic resin such as hard vinyl chloride.The protective box bottom plate 52 closes the lower surface opening of the protective box 51 and is placed on the step surface 49 of the connecting pipe 46. ing. At the center of the protective box bottom plate 52, a cylindrical portion 53 having a threaded outer peripheral surface is formed. Reference numeral 54 is a lid body made of concrete, and this lid body 54 has a substantially disc shape, and closes the upper opening of the protective box 51 so as to be openable. On the lower surface of the lid 54, a fitting portion 55 that fits into the upper end portion inside the protective box 51 is formed to project, and a step portion 56 that rests on the upper end surface of the protective box 51 is fitted into the fitting portion 55. Is formed around the. A recess 57 is formed on the upper surface of the lid 54, and a lid handle 58 is provided at the center of the recess 57.

Reference numeral 61 denotes a round valve body that is a water shutoff portion that opens and closes the water passage in the joint pipe 42. The valve body 61 moves up and down to a position between the drain pipe connecting portions 43 in the joint pipe 42. It is provided freely. Further, the lower end portion of the operating rod 62 located inside the standing pipe 45 is fixed to the valve body 61. The operating rod 62 is made of synthetic resin such as hard vinyl chloride that is relatively easy to cut, and has a vertical cylindrical shape. The operating rod 62 slidably penetrates the tubular portion 53 of the protective box bottom plate 52, and the upper end portion is located inside the protective box 52. A fixing cap 63 as a fixing tool for fixing the operating rod 62 is screwed onto the outer peripheral side of the cylindrical portion 53 of the protective box bottom plate 52. Further, a substantially T-shaped operating handle 64 is fixed to the upper end of the operating rod 62. The operating handle 64 has a hole-shaped operating rod connecting portion 65 in the lower portion, and the operating rod 62 is fitted into the operating rod connecting portion 65 and is fixed by an adhesive.

Next, the operation of the above configuration will be described. When constructing the underdrain drainage valve 41, the height of the underdrain drainage valve 41 is adjusted so that the upper end of the protection box 51 is aligned with the ground 22a of the ridge 22. Therefore, after laying the joint pipe 42 together with the water collection pipe 26 and the drainage pipes 32 and 33 in the ground, measure the height from the drainage pipe connection portion 43 of the water collection pipe 26 and the joint pipe 42 to the ground 22a of the ridge 22. Then, as shown by a chain line in FIG. 4 (b), the standing pipe 45 and the upper portion of the operating rod 62 are cut to an appropriate length. Then, the standing pipe connecting portion 47 of the connecting pipe 46 to which the protection box 51 is connected is fitted and adhered to the upper end portion of the standing pipe 45, and the operating rod connecting portion 65 of the operating handle 64 is fitted to the upper end portion of the operating rod 62. Combine and bond. Note that FIG. 4A shows the case where the overall height of the underdrain drainage valve 41 is increased, and FIG. 4B shows the case where the overall height of the underdrain drainage valve 41 is decreased.

Although the lid 54 is normally closed, the lid 54 is opened and the fixing cap 63 is loosened in order to open and close the main underdrain drainage valve 41 for the management of wetlands and drylands. Then, the valve handle 61 is opened and closed by moving the operating handle 64 up and down. If the fixing cap 63 is tightened, the valve rod 61 is fixed together with the operating rod 62. When the underdrain drainage valve 41 is open, as shown by the arrow a in FIG. 1, the underground water under the paddy field 21 absorbed in the water collection pipe 26 is discharged into the drainage pipes 32, 33 and the underdrain drainage valve 41. The water is discharged to the drainage flume 25 through the joint pipe 42. As a result, the paddy fields 21 can be made dry. On the other hand, when the underdrain drainage valve 41 is closed as shown in the figure, drainage from the water collection pipe 26 is blocked by the valve body 61 in the joint pipe 42, so underground water stops below the paddy field 21 and becomes a wetland. Is planned. Furthermore, by supplying water from the irrigation canal via the pipeline 31 and the rising pipe 29, it is possible to positively perform underground watering from the water collecting pipe 26 as shown by the arrow b in FIG.

As described above, in the main underdrain drainage valve 41, since the operation handle 64 is inside the protection box 51 and the top opening of the protection box 51 is closed by the lid 54, It is possible to expose only 54 to the ground and bury the rest in the ground. Moreover, since the fitting portion 55 on the lower surface of the lid 54 is fitted in the protection box 51, and the step portion 56 around the fitting portion 55 is placed on the upper end surface of the protection box 51, The entire protection box 51 can be buried in the ground, and the substantially plate-shaped lid 54 can be arranged on the same surface as the ground 22 a of the ridge 22. Further, since the height from the joint pipe 42 communicating with the water collection pipe 26 to the ground 22a of the ridge 22 is not constant, the upper end of the main underdrain drainage valve 41, that is, the lid 54 is located on the ground 22a of the ridge 22. To do this, it is necessary to adjust the height of the main underdrain drainage valve 41, but the height can be adjusted by cutting the standing pipe 45 and the operating rod 62 into appropriate lengths as described above. Then, the standing pipe 45 is configured to be fitted into the standing pipe connecting portion 47 of the connecting pipe 46, and the standing pipe 45 has a cylindrical shape, so that the standing pipe 45 is connected to the standing pipe connecting portion 47. Since the fitting portion has a columnar shape, the standing pipe 45 can be cut at any position and connected to the connecting pipe 46. Therefore, the height of the upper end of the underdrain drainage valve 41 can be arbitrarily adjusted, and the lid 54 can be disposed on the same surface as the ground 22a of the ridge 22. Along with this, the operating rod 62 is configured to fit into the operating rod connecting portion 65 of the operating handle 64, and the operating rod 62 has a cylindrical shape so that the operating rod 62 can be connected to the operating rod connecting portion 65. Since the fitting portion has a pillar shape, the operating rod 62 can be cut at any position and connected to the operating handle 64. Therefore, the height of the standing pipe 45 can be arbitrarily adjusted without being restricted by the operating rod 62, and the height of the operating handle 64 in the protection box 51 can be made constant.

By thus disposing the substantially flat plate-like lid 54 at the upper end of the underdrain drainage valve 41 on the same surface as the ground 22a of the ridge 22, the underdrain drainage valve 41 is used for mowing or the like. You can prevent it from getting in the way. In addition, it is possible to prevent the underdrain drainage valve 41 from being damaged by agricultural machinery or the like. Further, it is possible to prevent deterioration of the materials of the parts constituting the underdrain drainage valve 41 due to the ultraviolet rays of the sun or the like. Moreover, since only the lid 54, which is the only component exposed on the ground, is made of concrete, the strength of the lid 54 makes it less likely that the lid 54 will be damaged and will not easily deteriorate due to ultraviolet rays.

Furthermore, since the protection box bottom plate 52 is placed on the step surface 49 formed in the connection pipe 46, the protection box bottom plate 52 can be reliably supported together with the protection box 51, and the protection box bottom plate 52 is provided. The fixed state of the operating rod 62 by the fixed cap 63 can be ensured.

The present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above-described embodiment, the material of the lid 54 is concrete, but the material of the lid may be metal such as iron or stainless steel. In addition to the above, it is preferable that it is resistant to deterioration by ultraviolet rays. Further, the material, shape, and detailed structure of each component are not limited to those in the above-described embodiment. For example, the standing pipe, the operating rod, the protective box, the connecting part of the connecting pipe to the standing pipe and the protective box, and the operating rod connecting part of the operating handle are not limited to the cylindrical shape as in the above-mentioned embodiment, but may have a rectangular tube shape. It may be carried out, and the point is that the mutual fitting portions have a columnar shape. Further, the valve body is not limited to the round type as in the above-mentioned embodiment, but may be a water blocking plate type or the like.

[0029]

[Effect of the invention]

 According to the underdrain drainage valve of the invention of claim 1, the protection box in which the operation handle at the upper end of the operation rod is located inside the standing pipe in which the operation rod for operating the valve body is located is located. In addition to the provision of the cover, the top opening of this protective box is opened and closed by the lid, so that it is possible to expose only the lid to the ground and bury the other parts in the ground. It is possible to prevent the underdrain drainage valve from interfering with work, to prevent damage to the underdrain drainage valve due to agricultural equipment, etc., and also to deteriorate the materials of the parts constituting the underdrain drainage valve due to ultraviolet rays. Can be prevented.

According to the underdrain drainage valve of the second aspect of the invention, in addition to the effect of the first aspect of the invention, the lid body has a fitting portion that fits into an upper end portion inside the protection box, and the protection box. Since it has a step on the upper end face, it can be placed on the same surface as the ground, and it is more effective to prevent the underdrain drainage valve from interfering and to prevent damage and deterioration of the underdrain drainage valve. Can be improved.

According to the underdrain drainage valve of the invention of claim 3, in addition to the effect of the invention of claim 2, since the material of the lid body is concrete or metal, the lid body is deteriorated by ultraviolet rays or the like. Can be surely prevented.

According to the underdrain drainage valve of the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the standing pipe connecting portion fitted to the upper end of the standing pipe is provided at the bottom. In addition, the stand-up pipe is made of synthetic resin and the fitting surface to the connection pipe is made into a pillar shape, so that the height from the joint pipe to the ground is high. By cutting the standpipe, the lid can be placed on the same surface as the ground, and the effects of preventing the underdrain drainage valve from interfering and preventing damage and deterioration of the underdrain drainage valve are ensured. Can be obtained.

According to the underdrain drainage valve of the invention of claim 5, in addition to the effect of the invention of claim 4, the operating handle has an operating rod connecting portion into which the operating rod is fitted, and the operating rod is Since it is made of synthetic resin and the fitting surface for the operating handle is in the shape of a pillar, the height of the operating handle can be adjusted arbitrarily by cutting the operating rod, without being restricted by the operating rod. The height of the standing pipe can be arbitrarily adjusted, and the height of the operating handle can be made constant.

According to the underdrain drainage valve of the invention of claim 6, in addition to the effect of the invention of claim 4 or 5, in addition to the effect of the invention of claim 4, a step formed by forming a protective box bottom plate provided with a fixture for fixing the operating rod in the connection pipe. Since it is placed on the surface, the protection box bottom plate as well as the protection box can be reliably supported, and the operating rod can be securely fixed by the fixture.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an entire underdrain drainage facility, showing an embodiment of the underdrain drainage valve of the present invention.

FIG. 2 is a side view of the above-mentioned underdrain drainage valve.

FIG. 3 is a perspective view of the underdrain drainage valve of the same.

FIG. 4 (a) is a sectional view taken along line IV-IV of FIG.
(B) is a cross-sectional view showing a state in which the overall height of the underdrain drainage valve is further lowered.

FIG. 5 is a cross-sectional view showing an example of a conventional underdrain drainage valve.

[Explanation of symbols]

 26 Underdrain drainage pipe 41 Underdrain drainage valve 42 Joint pipe 45 Standing pipe 46 Connecting pipe 47 Standing pipe connecting part 49 Step surface 51 Protective box 52 Protective box bottom plate 54 Lid 55 Fitting part 56 Step part 61 Valve body 62 Operating rod 63 Fixed cap (fixture) 64 Control handle 65 Control rod connection

Claims (6)

[Utility model registration claims] 1. A joint pipe forming a water passage communicating with a underdrain water collecting pipe, a valve body provided in the joint pipe for opening and closing the water passage, an operating rod rising from the valve body, and an upper end portion of the operating rod. An operating handle provided on the stand, a standing pipe standing upright from the joint pipe and in which the operating rod is located inside, a protection box provided on the upper side of the standing pipe in which the operating handle is located inside, and an upper surface of the protection box. An underdrain drainage valve having a lid for opening and closing the opening. 2. The lid has a fitting portion that fits into an upper end portion inside the protection box, and a step portion that rests on an upper end surface of the protection box, and can be arranged on the same surface as the ground. The valve for underdrain drainage according to claim 1, characterized in that. 3. The underdrain drainage valve according to claim 2, wherein the material of the lid is concrete or metal. 4. A connecting pipe having a standing pipe connecting portion fitted to an upper end portion of the standing pipe at a lower portion and the protection box being provided at an upper portion, the standing pipe being made of a synthetic resin, The fitting surface to the connecting pipe is made into a pillar shape,
The underdrain drainage valve according to any one of claims 1 to 3, wherein the lid can be disposed on the same surface as the ground around the farmland by cutting the standing pipe. 5. The operating handle has an operating rod connecting portion with which the operating rod is fitted, the operating rod is made of synthetic resin, and a fitting surface for the operating handle is formed into a pillar shape. ,
The underdrain drainage valve according to claim 4, wherein the height of the operation handle can be adjusted by cutting the operation rod. 6. A protective box bottom plate which penetrates the operating rod and closes a lower surface of the protective box, and a fixture which is provided on the protective box bottom plate and fixes the operating rod.
The underdrain drainage valve according to claim 4 or 5, wherein the protection box bottom plate is placed on a stepped surface formed in the connection pipe.