JP3125175U - Floating type floating dust outflow control device for drainage equipment - Google Patents

Abstract

[PROBLEMS] To control drainage of oily components and floating contaminants in a rainwater spout chamber (a diversion manhole) that divides rainwater and sewage in a drainage device for drainage treatment of combined sewers. Provided is a floating floating dust outflow control device for a device.
A control plate is installed on a diversion weir and a debris removal device in a diversion manhole of a combined sewer to follow the water level and capture and hold oily components and floating debris. In addition, since the floating floating substance outflow control device for drainage equipment floats on the surface water with the slowest flow velocity, the hydraulic loss that occurs is the smallest, and the impact on secondary disasters etc. due to rising water levels It can be suppressed as much as possible.
[Selection] Figure 5A

Description

The present invention relates to a floating floating substance outflow control device for a drainage device, particularly in a drainage device for drainage treatment of a combined sewer, in a rainwater discharge chamber (water diversion hole) for diverting rainwater and sewage. The present invention relates to a control device that controls the outflow of oily components and floating impurities.

Conventionally, the impurities discharged from the diversion manholes of the combined sewer have been discharged directly into rivers and the sea except for the initial rainfall. Recently, oil balls drifted to Odaiba Seaside Park in Tokyo, which became a big problem. In 2001, the national government started “Spirit 21”, which conducted a survey of actual conditions of overflowing water in rainy weather and promoted technical development in a short and comprehensive manner. In FY2002, recruiting researchers were recruited, and then R & D over three years was conducted. Of the 24 technical themes developed, there are 8 technologies for removing impurities (screen). These impurities removing devices remove impurities contained in the discharged water by a scraping method. In 2003, a vortex-type water surface control device for a drainage device in which a vertical control plate was installed between an inflow pipe and a interception pipe was invented. All the contaminant removal devices are fixed to the diversion weir so as not to move, and function within the planned water level in the diversion manhole. Therefore, if the water level rises above the planned water level, oily components and floating impurities will flow over the diversion weir and the contaminant removal device and be discharged into the river and the sea. In addition, increasing the function of the contaminant removal device increases the size of the device, which obstructs the flow of water, which increases hydraulic losses and increases the upstream of the inflowing pipelines and waterways. The water level rises, causing problems such as inundation and difficulty in flowing toilet water.

FIG. 1A is a perspective view of a diversion manhole of a conventional merging sewer, FIG. 1B shows a state in fine weather, 1 is an inflow pipe, 2 is a blocking pipe, 3 is a diversion weir, 4 is a discharge pipe, 5 Is inflowing oily matter and floating impurities. FIG. 1C and FIG. 1D show the state during rainy weather. At the time of the fine weather of the conventional diversion manhole, as shown in FIG. 1A and FIG. 1B, the whole amount of sewage containing oily components and floating impurities flowing from the inflow pipe 1 flows out to the interception pipe 2, Down to the sewage treatment plant. 1C and 1D, rainwater and sewage that have joined together flow in when it rains, and when the water level is higher than the planned level, sewage containing oily components and floating contaminants 5 will enter the diversion weir 3. Overflow, flow down the discharge pipe 4 and discharge into the public water area.

FIG. 2A is a perspective view of a water diversion hole in which the dust removing device 6 by the “spirit 21” scraping method (screen) is installed, and FIG. 2B shows a cross-section in a state where the water level has risen above the planned water level. . Since the shape of the contaminant 5 that can be captured by these contaminant removal devices is determined by the shape of the scraping method, the floating contaminant 5 smaller than about 4 to 6 mm is discharged without being captured. . Moreover, since the oily component contained in the sewage cannot be captured, it is all discharged.

In the vortex-type water surface control device for a drainage device, a vertical control plate that generates a vortex has a disadvantage that a large hydraulic loss occurs. In order to eliminate this defect, since the device discharges from between the guide wall and the diversion weir when the water level is higher than the diversion weir, the large-sized foreign matter is not discharged into the public water area, so the aesthetic improvement Although the effect can be expected, fine contaminants in the water are released into public waters even within the planned water level. Therefore, there is a drawback that the degree of expectation of the effect of improving the pollution load of public water bodies is small.

As described above, one of the causes of water pollution in public water bodies is that when the water volume exceeds a certain level during rainy weather in conventional diversion holes, as shown in FIG. 1C and FIG. This is because a part of the sewage containing the material 5 also overflows the diversion weir 3 and flows out to the public water area through the discharge pipe 4. Moreover, since the water level of the planned water volume is set higher than the interception pipe 2, as shown in FIG. 1D, the interception pipe 2 is submerged, and oily components and floating contaminants 5 are near the entrance of the interception pipe 2 When the water level becomes higher than the planned water level, all the oily components and floating impurities 5 flow over the diversion weir 3 and the contaminant removal device 6 and are discharged.

The amount of sewage in the plan that flows into the diversion manhole is controlled so that it flows out to the interception pipe 2, and if the amount of sewage exceeds the plan, oily components and floating impurities 5 will be discharged. At the same time, it is a problem to capture and hold the oil so that it does not flow into the public water area, and to let the oily components and floating impurities 5 flow down to the pump station and the sewage treatment plant. In addition, since the effects of the functional level of the equipment to be captured and hydraulic losses (which cause secondary disasters due to rising water levels) conflict, there is a difficulty to make the equipment with a structure that can suppress losses as much as possible. there were. The present invention has been made to solve these problems.

As a means for solving such a problem, improvement of a conventional water diversion manhole is performed so that the oily component and the floating contaminant 5 do not overflow the diversion weir 3 and the contaminant removal device 6. It is necessary to supplement the dust removing device 6.

The floating floating substance outflow control device for drainage apparatus of the present invention follows the water level along a guide 7 fixed between the inflow pipe 1 and the interception pipe 2 in the diversion manhole of the combined sewer. It has the control board 8 which interlocks, It is characterized by the above-mentioned.

The floating floating dust outflow control device for a drainage device of the present invention can prevent the outflow regardless of the shape of the foreign matter 5 because the total inflow amount flows down to the interception pipe 2 at the water level below the planned water amount. The captured oily content and floating contaminants 5 are retained for water levels that are greater than the planned water volume.

The retained oily components and floating impurities 5 rise to the maximum water level, then descend, and flow below the top of the intercepting pipe 2 and flow down to the intercepting pipe 2, so that they are not released into public water areas.

As described above, according to the floating floating contaminant outflow control device for the drainage device of the present invention, the oily component and the floating contaminant 5 are controlled by the control plate 8, and the oily component and the floating contaminant 5 are controlled. There is a big benefit to be able to reduce runoff to public waters. In addition, hydraulic losses due to the floating floating substance outflow control device for the drainage device are the smallest because the control plate 8 floats on the surface water with a slow flow velocity, and the impact on secondary disasters, etc. due to rising water levels. Can also be suppressed.

The floating floating dust outflow control device for the drainage device on the diversion weir 3 includes a guide 7, a control plate 8, and a water stop rubber 15. The guide 7 that supports the control plate 8 on the upstream side suppresses the turbulent flow caused by the inflow in the upstream portion from stirring the oily components and the floating contaminants 5 that have flowed down the upper layer of the inflow pipe 1. Since the stagnation part of the water flow is made, the trapped oily component and the floating contaminant 5 are securely held. The control plate 8 includes a swash plate 10, a stabilizer plate 11, a vertical plate 12, a joint material 13, and a water stop plate 14, and has a weight / outer volume ratio lighter than a specific gravity 1 of water. Further, the height of the vertical plate 12 minimizes the difference between the planned water level and the top surface of the existing diversion weir 3 and the top of the dust removing device 6, but the shape and physical properties of the floating dust 5. Since the physical characteristics depend on the regional characteristics, it is adjusted for each installation location, and the amount of hydraulic loss that occurs at the same time is taken into consideration. The swash plate 10 attached to the vertical plate 12 decelerates the flow velocity at the lower end of the vertical plate 12 by generating a vortex 16 so that the foreign matter 5 near the boundary is drawn into the discharge side as much as possible. It has a hole 9 for venting air to prevent it. In order to enhance the function of holding the oily component and floating impurities 5 of the control plate 8, a bowl-like shape is formed by the swash plate 10, the stabilizer plate 11, and the vertical plate 12. Since the control plate 8 vibrates by flowing water, the plate water stop plate 14 is for reducing the amplitude and for preventing discharge within the planned water level. At least longer than the difference of the rubber 15. In addition, when the flow rate of the discharged water is low, the lower part of the water stop plate 14 is bent in the flowing direction of the discharged water in order to increase the lifting pressure due to the flow rate. The control plate 8 has a weight and a shape such that the sum of its own weight, buoyancy, and rotational moment due to water pressure acting on the control plate 8 at the planned water level is zero.

The floating floating dust outflow control device for the drainage device on the dust removing device is composed of a guide 7 and a control plate 8. The height of the vertical plate 12 and the water stop plate 14 is adjusted for each installation location because the five shapes and physical properties of floating contaminants are affected by regional characteristics. The amount can also be determined. The control plate 8 has a weight and a shape such that the sum of its own weight, buoyancy, and rotational moment due to water pressure acting on the control plate 8 at the planned water level is zero.

Examples of application are shown in FIGS. 4A, 4B, 4D, 4E, 5A, and 5B.

It is the perspective view which showed the existing water diversion person hole It is the cross-sectional view which showed the state at the time of the fine weather of the existing water diversion manhole It is the cross-sectional view which showed the state at the time of rain of the existing water diversion manhole It is the longitudinal cross-sectional view which showed the state at the time of rain of the existing water diversion manhole It is a perspective view of an existing water diversion hole equipped with a contaminant removal device. It is the cross-sectional view which showed the overflow condition of the rainy day of the existing diversion manhole equipped with the dust removal apparatus It is a top view of the floating type floating contaminant outflow control board for drainage devices. It is sectional drawing which shows the installation on the diversion weir of the floating type floating contaminant outflow control board for drainage devices It is sectional drawing which shows installation on the contaminant removal apparatus of the floating type floating contaminant outflow control board for drainage devices. It is a perspective view of a diversion manhole equipped with a floating floating dust outflow control device for a drainage device. It is a diversion manhole top view equipped with a floating floating dust outflow control device for a drainage device. It is the cross-sectional view which showed the state at the time of the fine water of the water diversion manhole which attached the floating type floating contaminant outflow control apparatus for drainage devices on the diversion weir It is the cross-sectional view which showed the state within the plan water level at the time of rain of the water diversion manhole which attached the floating type floating dust spill control device for drainage equipment on the diversion weir It is the cross-sectional view which showed the state more than the plan water level of the water diversion manhole which attached the floating type floating dust outflow control apparatus for drainage devices on the diversion weir It is the cross-sectional view which showed the state within the plan water level at the time of rain of the diversion manhole which attached the floating type floating dust outflow control device for drainage devices on the dust removal device It is the cross-sectional view which showed the state more than the plan water level of the diversion manhole which mounted the floating type floating dust outflow control apparatus for drainage devices on the dust removal apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inflow pipe 2 Interceptor pipe 3 Divided water weir 4 Outflow pipe 5 Oily part and floating | floating contaminants 6 Contaminant removal apparatus 7 Guide 8 Control board 9 Air vent hole 10 Swash plate 11 Stabilizing plate 12 Vertical plate 13 Joint 14 Water stop plate 15 Water stop rubber 16 Eddy current

Claims (7)

It is characterized in that a control board that follows the water level is installed on the diversion weir and the dust removal device inserted between the inflow pipe and the interception pipe in the diversion manhole of the combined sewer. A floating floating dust outflow control device for drainage equipment. Within the planned water level, the control plate's water stop plate and water stop rubber attached to the diversion weir prevent outflow, and when the water level rises, the control plate that captures and holds the contaminants rises in conjunction with the water level. The floating floating contaminant outflow control device for a drainage device according to claim 1, wherein when the water level falls from the top of the intercepting pipe, the contaminants flow down to the intercepting pipe. The apparatus for removing or controlling oily components and floating contaminants has a function of minimizing hydraulic loss, and has a function of minimizing hydraulic loss. . The floating floating substance outflow control device for a drainage device according to claim 1, wherein the guide for supporting the control plate with a point has functions of suppressing turbulence and capturing and holding the foreign matter. The cross-sectional shape that captures and holds the impurities on the control plate is a bowl-shaped shape. The control plate is characterized in that it has a structure that generates a vortex on the lower surface of the control panel in order to prevent the foreign matter from being drawn into the discharge side having a high flow velocity. The lower part of the water stop plate is characterized by a shape that bends in the direction of water discharge.

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