JP3957213B2 - Sand removal structure of floating undulating gate facility - Google Patents

Description

  The present invention relates to floating undulations utilizing water pressure due to water level changes in the upstream and downstream of waterways, among gate facilities installed to prevent reverse flow of water in waterways such as rivers and sluices such as rivers. More particularly, the present invention relates to a sand removal structure for a floating undulating gate facility that discharges and cleans dirt, dust, and the like accumulated below the floating undulating door body.

  In waterways such as rivers, for example, locks and sluices of river embankments, ascending and descending gate facilities are generally used to prevent the river water from flowing back into the dikes or tributaries when the rivers are flooded (floods, etc.) In recent years, as described in Patent Documents 1 to 3, the installation of a floating undulating gate that can automatically open and close the gate according to the river water level and appropriately without power Has come to be done.

  This gate type is a structure in which a floating undulating door body installed on the water channel floor by a hinge system can stand up and fall freely due to fluctuations in the water level of the water channel. It has been widely used in tidal rivers or tidal ponds inside the reclamation dike for the purpose of preventing backflow.

  FIG. 5 is a side sectional view showing a conventional floating undulating gate facility installed as a gate facility that opens and closes the exit of the lock on the river bank, and (a) of the figure shows a fully closed state. , (B) shows a state in the middle of opening, and (c) shows an open state.

  In FIG. 5, the floating undulating door 1 is installed at the exit of the pier 22 of the river bank 21. This floating body-type undulating door body 1 is installed in a hinge manner on the water channel floor at the outlet of the dredger tube 22 and uses the water pressure (buoyancy) due to the water level change upstream and downstream of the water channel portion to exit the dredger tube 22. Is designed to open and close automatically.

  That is, when the water level H1 on the main river A side is higher than the water level H2 on the tributary B side (the dredger pipe 22), the floating undulating door body 1 stands up as shown in FIG. To prevent backflow of water. Further, when the water level H1 on the main river A side approaches the water level H2 on the tributary B side (the side pipe 22), the floating undulating door body 1 gradually opens as shown in FIG. When the water level H1 on the side becomes lower than the water level H2 on the side of the tributary B (the side pipe 22), as shown in FIG. 5 (c), the floating undulating door 1 opens and the water on the side of the tributary B (side pipe 22). Will be drained naturally to the river A side.

  In such a floating type undulating gate facility, the standing operation does not work properly due to sediment or dust deposited on the floating floating type door body 1 or due to earth or sand deposited on the lower part of the floating type door body 1. Occurrence of troubles such as inadequate lodging operation may occur.

  Among these, the failure of the standing operation failure can be solved by forcibly opening and closing the floating undulating door 1 with the operation device 20 shown in FIG.

  However, it is difficult to remove the earth and sand accumulated in the lower part of the floating undulating door body 1 only by the above-mentioned forced opening operation, and generally it must be removed by human power.

The sediment deposited on the lower part of the floating undulating door body 1 is generated by depositing sediment transported from the upstream or downstream, and is typically deposited in the form indicated by reference numeral 23 in FIG. If the sedimentary sand 23 deposited on the lower part of the floating undulating door 1 is left unattended, the floating undulating door 1 cannot fall down completely, causing a drainage failure of the lock 22 or depositing sediment 23. However, there is a problem that the downstream surface of the floating undulating door 1 is damaged.
JP 2000-45254 A JP 2000-240044 A JP 2001-159126 A

  The problem to be solved by the present invention is to provide a sand removal structure for a floating undulation type gate facility capable of forcibly discharging and cleaning sediment deposited on the lower part of the floating undulation type door.

The present invention is a floating undulating gate having a floating undulating door that is installed on a floor of a water channel by a hinge system and stands and falls so as to open or close a water flow section of the water channel by changing the water level of the water channel It is a sand removal structure of equipment, and has a water inlet on the side wall of the upstream side of the floating undulating door, and is downstream from the lower watertight part of the floating undulating door. A water guide pipe having a water outlet is provided at a position in contact with the water, and a check valve for preventing a backflow of water from the downstream side to the upstream side of the floating undulating door body is provided in the vicinity of the water inlet. Further, an exhaust pipe having one end connected to the water conduit and the other end opened to the atmosphere is provided downstream of the check valve .

  According to the present invention, since water is discharged from the water outlet located below the lower watertight portion of the floating undulating door, the sediment deposited on the lower part of the floating undulating door is forcibly discharged. Can be cleaned. Therefore, it is possible to prevent the occurrence of a malfunction of the floating undulation type door body due to the accumulated earth and sand, and it is also possible to prevent the occurrence of damage to the floating undulation type door body due to the accumulated earth and sand.

  Embodiments of the present invention will be described below based on examples shown in the drawings.

  FIG. 1: shows the principal part of the sand removal structure of the floating type undulating gate equipment concerning this invention, (a) of the figure is a sectional side view, (b) is a sectional view seen from the downstream side, (c) These are sectional drawings which looked at (b) from the left side, and all show the state which raised the floating type undulating type door body 1. FIG.

  In FIG. 1, the floating type undulating door body 1 is formed on a door body lower rotary support portion 8 provided on the water channel floor of the riverbank 21 at the outlet of the pier 22 of the river bank 21 in the same manner as the conventional one described above with reference to FIG. 5. The hinge system (pin joint) is installed so that it can rotate up and down. In the standing state shown in FIG. 1, the upper end portion of the floating undulating door body 1 is supported by an upper support metal 9 provided at the upper end of the vertical tube 22 outlet.

  An upper watertight rubber 7 is provided on the upper door hardware 4 installed at the upper end of the tub tube 22 outlet, and the upper watertight rubber 7 is in contact with the upper end of the floating undulating door 1 to form an upper watertight portion. The watertightness of the upper part of the floating undulating door 1 is ensured in the standing state. Further, a lower watertight rubber 5 is attached to the lower door hardware 2 installed at the lower end of the outlet of the vertical pipe 22, and the lower watertight rubber 5 and the lower end of the floating undulating door 1 are always in contact at all operating angles. The lower watertight part is formed by contact, and thereby the watertightness of the lower part of the floating undulating door 1 is ensured. Further, side watertight rubber 6 is provided on both sides of the floating undulating door body 1, and this side watertight rubber 6 abuts on the side door hardware 3 provided on both sides of the outlet of the tub tube 22. The side watertight portion is formed by this, and thereby the watertightness of both sides of the floating undulating door body 1 is ensured.

  The floating type undulating door body 1 having the above-described configuration is similar to the conventional one described above with reference to FIG. 5, and uses the water pressure (buoyancy) due to the water level change upstream and downstream of the water channel portion to exit the dredged pipe 22. Is designed to open and close automatically.

  A drive shaft 10 attached concentrically with the rotating shaft of the floating undulating door 1 is connected to a drive arm 11. The drive arm 11 is connected to the hydraulic cylinder 20a. The hydraulic cylinder 20a is expanded and contracted by operating the operating device 20 as shown in FIG. 4, and the drive shaft 10 is rotated through the drive arm 11 to force the floating undulating door 1 to move. It can be opened and closed. When the floating undulating door 1 is automatically opened and closed by water pressure, the hydraulic cylinder 20a is structured to follow the operation of the floating undulating door 1.

  Further, in the floating type undulating gate facility according to the present invention, a water guide pipe 12 is provided on the side wall of the dredger pipe 22 in order to forcibly discharge and clean the sediment deposited on the lower part of the floating type undulating door body 1. Yes.

  2A and 2B show the structure of the water conduit 12, wherein FIG. 2A is a schematic view of the side wall of the dredger tube 22 viewed from the front, and FIGS. 2B and 2C are cross-sectional views viewed from the downstream side. .

  As shown in FIG. 2, the water conduit 12 has a water inlet 13 in the side wall of the vertical pipe 22 upstream of the floating undulating door 1, penetrates through the side wall of the vertical pipe 22, Near the lower end of the side wall portion, that is, below the lower watertight rubber 5 of the floating undulating door body 1, a water outlet 15 is provided at a position in contact with water on the downstream side. A plurality of the water discharge ports 15 are provided along the lower portion of the floating undulating door body 1. In addition, a check valve 14 is provided in the vicinity of the water inlet 13 of the water conduit 12 to prevent the backflow of water from the downstream side to the upstream side of the floating undulating door body 1. Further, one end of the exhaust pipe 16 is connected to the downstream side of the check pipe 14 of the water conduit 12 to exhaust and clean the air in the water conduit 12, and the other end is open to the atmosphere side.

  Hereinafter, the sand removal mechanism at the lower part of the floating undulating door body 1 by the water conduit 12 will be described.

  FIG. 3 is an explanatory view of the sand removal mechanism by the water conduit 12, wherein (a) shows the case where the upstream water level of the floating undulating door 1 is higher than the downstream water level, and (b) shows the floating undulation. The case where the upstream water level of the mold door 1 is lower than the downstream water level is shown. 3 (a) and 3 (b), (i) is a sectional side view, and (ii) is a sectional view as seen from the downstream side.

  When the upstream water level of the floating undulating door 1 is higher than the downstream water level, as shown in FIG. 3 (a), the check valve 14 in the water conduit 12 is opened by water pressure, and the water pressure ( Due to the difference in water level between the upstream and downstream, water flows from the upstream to the downstream in the water conduit 12 (water flow a in FIG. 3A) and flows out from the outlet 15 (water flow a in FIG. 3A). As a result, the sediment deposited on the lower part of the floating undulating door 1 is forcibly discharged and cleaned.

  On the other hand, when the upstream water level of the floating undulating door body 1 is lower than the downstream water level, the check valve 14 is closed and the backflow of water through the water conduit 12 is prevented. Further, since one end of the exhaust pipe 16 is connected to the downstream side of the check valve 14, back flow of water through the exhaust pipe 16 is also prevented.

  The sand removal mechanism when the floating undulating door 1 automatically opens and closes due to the difference between the upstream and downstream water levels has been described. Next, the sand removal mechanism when the floating undulating door 1 is forcibly opened and closed. explain.

  First, FIG. 4A shows a sand removal mechanism when the floating undulating door 1 automatically opens and closes. In this case, similarly to the case described above with reference to FIG. 3 (a), the water flow is generated at the lower part of the floating undulating door 1 due to the upstream / downstream water level difference Δh1, and the sediment is discharged and cleaned. .

  On the other hand, FIG.4 (b) shows the sand removal mechanism in the case of forcibly opening and closing the floating type undulating door 1. In this case, as shown in the same figure, the floating body type undulating door body 1 is forcibly raised by the operating device 20, and an upstream / downstream water level difference Δh2 larger than the upstream / downstream water level difference Δh1 in the case of FIG. Forming. As a result, a water flow U stronger than the water flow a in the case of FIG. 4 (a) is obtained, and sediment sediment in the lower part of the floating undulating door body 1 can be discharged and cleaned reliably and deposited on the downstream channel floor. Waste soil and dirt can also be discharged and cleaned. Therefore, it is preferable to periodically perform the operation as shown in FIG.

  INDUSTRIAL APPLICABILITY The present invention can be used as a sand removal structure for discharging and cleaning sediment sediment deposited on the lower part of a floating body door of a floating body gate facility.

The principal part of the sand removal structure of the floating type undulating gate facility according to the present invention is shown. The structure of a water conduit is shown. The sand removal mechanism by a water conduit when the floating undulating door automatically opens and closes is shown. The sand removal mechanism by a water conduit is shown, (a) shows the case where a floating type undulating door is automatically opened and closed, and (b) shows the case where the floating type undulating door is forcibly opened and closed. This shows a conventional floating undulating gate facility installed as a gate facility that opens and closes the exit of the river bank. The form of the earth and sand deposited on the lower part of the floating undulating door body 1 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floating type undulating type door body 2 Lower door metal fittings 3 Side door metal fittings 4 Upper door metal fittings 5 Lower watertight rubber 6 Side watertight rubber 7 Upper watertight rubber 8 Door lower body rotation support part 9 Upper bearing metal 10 Drive shaft DESCRIPTION OF SYMBOLS 11 Drive arm 12 Water conveyance pipe 13 Water conveyance port 14 Check valve 15 Water discharge port 16 Exhaust pipe 20 Operation apparatus 20a Hydraulic cylinder 21 River dike 22 Dredging pipe 23 Sediment

Claims (1)

Sand drainage of floating undulating gate equipment that has a floating undulating door that is installed on the floor of the water channel using a hinge system, and rises and falls to open or close the water flow section of the water channel due to changes in the water level of the water channel Structure,
A water inlet is provided in the side wall of the upstream side of the floating undulating door body, and a water outlet is provided at a position below the lower watertight portion of the floating undulating door body and in contact with the downstream water. A non-return valve for preventing a back flow of water from the downstream side to the upstream side of the floating undulating door body is provided in the vicinity of the water inlet, and further from the check valve. A sand discharge structure for a floating undulating gate facility, characterized in that an exhaust pipe having one end connected to a water conduit and the other end open to the atmosphere is provided downstream .

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