JP4369412B2 - Inflow gate operation control method and drainage pump equipment - Google Patents

Description

  The present invention relates to an operation control method for an inflow gate installed at the entrance of an inflow water channel of a drainage pump facility for draining river water, and a drainage pump facility.

  Conventionally, in places where drainage gates and drainage gates such as the confluence of rivers flowing from the tributary into the main river are provided, the water level of the tributary is usually higher than the water level of the main river, so the water from the tributary flows under the natural flow. Flows into the river. However, in case of heavy rain, the water level of the main river is higher than the water level of the tributary, and the water of the main river flows back to the tributary. Therefore, the drainage gate and drainage gate at the junction are closed, and the drainage pump Forcibly drain water from the tributaries into the main river. The drainage pump is operated by draining the water led from the tributaries to the inflow channel into the main river using the drainage pump. When the drainage pump equipment is not operated, the inflow gate installed at the inflow channel entrance is closed.

  Conventionally, when operating the drainage pump facility, the drainage pump is operated with the inflow gate fully open. On the other hand, floating substances that flow into the inflow channel along with the flow of water were removed with a dust remover installed in the inflow channel. The suspended matter removed by scraping with a dust remover was either incinerated by installing an incineration facility at the drainage pump station or transported to the incinerator for processing.

  However, in the normal state where the river is not flooded, the drainage pump equipment is not operated, and the water of the tributary flows directly into the main river under natural flow. In this case, floating matter flowing down the tributary It flows into the main river as it is. In other words, except when the drainage pump facility was operated, the floating material flowing down in the tributary was flowing up into the main river without being scraped or incinerated. On the other hand, it was troubled with the treatment of the suspended matter that was scraped only when the drainage pump facility was in operation.

  The present invention has been made in view of the above points, and the purpose of the present invention is to operate an inflow gate that does not require the drainage pump equipment to handle floating matters that hinder the drainage pump operation even when the drainage pump equipment is operated. It is to provide a control method and a drainage pump facility.

  The invention according to claim 1 of the present application is an operation control method for an inflow gate installed at an inflow channel entrance of a drainage pump facility for draining river water. The lower end of the inflow gate that is opened during the operation of the drainage pump facility is located above the water surface. An inflow gate operation control method is characterized in that floating substances are prevented from flowing into the inflow water channel by maintaining the lowered state. And, for example, if the inflow channel of this drainage pump facility is connected to a tributary that flows into the main river, this suspended matter will flow downstream in the tributary until the water level in the main river drops and the tributary can flow naturally. Store it.

  In the invention according to claim 2 of the present application, a change in the water level is detected by a signal from a water level detection means provided in the inflow water channel, and the lower end of the inflow gate is lower than the water surface by a specified water depth according to the change in the water level. The operation control method for an inflow gate according to claim 1, wherein the operation is performed so as to maintain the above.

  The invention according to claim 3 of the present application is provided with an inflow gate at the inlet of the inflow channel connected to the river and a drainage pump for draining the river water flowing into the inflow channel by opening the inflow gate. In the drainage pump facility, the control means for preventing the inflow of floating substances into the inflow channel by maintaining the lower end of the inflow gate opened when the drainage pump facility is operated below the water surface is provided. There is a drainage pump facility.

  The invention according to claim 4 of the present application is the drainage pump facility according to claim 3, characterized in that a water level detecting means for detecting the water level of the river flowing into the inflow channel is installed.

  According to invention of Claim 1, 3, it becomes unnecessary to process the floating matter which becomes an obstacle of drainage pump operation when the drainage pump facility is operated. Not only does it need to be expensive, but it also eliminates the problem of odors until the suspended matter is dried.

  According to invention of Claim 2, 4, even if the water level which flowed into the inflow water channel changes, the lower end of the inflow gate can be easily maintained in a state where the specified water level is lowered from the water surface.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic plan view of the entire drainage pump facility for operating the inflow gate according to the present invention. As shown in the figure, a drainage gate or drainage gate 3 is provided at a location where the tributary 2 flows into the main river 1, and an inflow water channel 4 is drawn out from the tributary 2. An inflow gate 5 is provided at the inlet of the inflow water channel 4, and two drain pumps 7, 7 are installed in the inflow water channel 4, and the water discharged from the drain pumps 7, 7 passes through the check valves 8, 8. It passes through the discharge pipe 9, passes through the discharge gate 10, and is drained into the main river 1.

  Ordinarily, when the water of the tributary 2 flows into the main river under natural flow, the gate of the drainage gate or the drainage lock 3 is opened and the drainage pump facility is not operated. At this time, the inflow gate 5 is closed, so that floating substances do not enter the inflow water channel 4.

  On the other hand, when the water level of the main river 1 becomes higher than the water level of the branch river 2 due to heavy rain and the gate of the drainage gate or drainage gate 3 is closed, the inflow gate 5 is opened by a predetermined amount and the drainage pumps 7 and 7 are operated. Start and forcibly drain the water flowing through the tributaries 2 to the main river 1 side.

  At this time, the inflow gate 5 is controlled by control means (inflow gate open / close control means) for controlling the open / close of the inflow gate 5 so that the lower end of the inflow gate 5 is maintained at a predetermined dimension below the water surface. Here, FIG. 2 is a schematic cross-sectional view of the main part showing the state of the vicinity of the inflow gate 5 when the inflow gate 5 is opened. As shown in the figure, the water in the tributary 2 flows into the inflow channel 4 by the operation of the drain pumps 7 and 7, but the lower end of the inflow gate 5 is lowered by a predetermined dimension from the water surface as described above. Therefore, the floating substance 13 that has flowed in the tributary 2 is blocked from flowing into the inflow water channel 4 by the lower end of the inflow gate 5, and remains floating in the tributary 2. Reference numeral 11 denotes an inflow gate lifting shaft.

  The floating substance 13 that is prevented from flowing into the inflow water channel 4 by the inflow gate 5 accumulates while floating in the downstream of the branch river 2. When the water level of the main river is lowered and the gate of the drainage gate or the drainage gate 3 is opened and the water of the tributary 2 naturally flows into the main river 1, the suspended matter 13 collected downstream of the tributary 2 is also stored. It flows out into the river 1.

  By the way, the water depth 12 to be inserted into the water at the lower end of the inflow gate 5 needs to be maintained at a water depth (specified water depth) at which the suspended matter 13 does not penetrate into the inflow water channel 4, but the water level of the inflow water channel 4 changes. 1 detects a change in the water level by installing a water level detection means (water level detector) 6 at a predetermined position in the inflow water channel 4 as shown in FIG. 1, and inputs the detected water level to the control means, The inflow gate can be operated up and down (automatic operation) by the control means so that the water depth 12 maintains a set depth (specified water depth).

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. Note that any shape or structure not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are achieved. For example, in the above embodiment, the drainage pump facility according to the present invention is installed at a location where a tributary flows into the main river, but may be installed at other necessary locations in various rivers and waterways as necessary.

It is a schematic plan view of the whole drainage pump equipment. It is a principal part schematic sectional drawing which shows the state of the inflow gate 5 vicinity part when the inflow gate 5 is opened.

Explanation of symbols

1 Main river 2 Branch river 3 Drainage gate or drainage gate 4 Inflow waterway 5 Inflow gate 6 Water level detection means (water level detector)
7, 7 Drain pumps 8, 8 Check valve 9 Discharge pipe 10 Discharge gate 11 Inflow gate lifting shaft 12 Water depth 13 at the bottom of the inflow gate Floating matter

Claims (4)

In the operation control method of the inflow gate installed at the inflow channel entrance of the drainage pump facility that drains the river water,
An inflow gate operation control method characterized in that floating substances are prevented from flowing into an inflow water channel by maintaining the lower end of the inflow gate opened during operation of the drainage pump facility below the water surface.   A change in the water level is detected by a signal from a water level detection means provided in the inflow water channel, and the inflow gate is operated so as to maintain a state in which the lower end of the inflow gate is lower than the water surface by a predetermined level according to the change in the water level. The operation control method for an inflow gate according to claim 1. In the drainage pump facility in which an inflow gate is installed at the entrance of the inflow channel connected to the river, and a drainage pump is installed to drain the river water flowing into the inflow channel by opening the inflow gate,
A drainage pump facility comprising a control means for preventing inflow of floating substances into the inflow water channel by maintaining a lower end of the inflow gate that is opened during the operation of the drainage pump facility below the water surface.   The drainage pump equipment according to claim 3, further comprising a water level detecting means for detecting the water level of the river flowing into the inflow water channel.

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