KR102624472B1 - Apparatus for treating rainwater for bridge or manhole - Google Patents

Abstract

The present invention relates to a bridge and rainwater manhole initial sewage treatment device. Initial rainwater flowing in from a bridge or road through the grating of a manhole is filtered through a filter-type screen net provided in the body of the initial rainwater treatment device, and suspended solids are filtered. And the sediment is collected on the lower side of the body, and various sludges filtered through the filter-type screen net and adsorbed on the filter hole side are lifted and lowered by the sludge removal member by their own buoyancy along the vertical overflow pipe according to the water level of the rainwater. By scraping off the sludge attached to the screen mesh with a rotating motion, it minimizes clogging and maintains the filterability of rainwater. Multiple supports provided at the bottom of the body reduce noise as a buffering effect. At the same time, it prevents damage to the body due to changes in rainwater inflow and maintains the gap between the body and the inner floor of the manhole, which has the effect of facilitating the discharge of purified water.

Description

Bridge and rainwater manhole initial rainwater treatment device {Apparatus for treating rainwater for bridge or manhole}

The present invention relates to an initial rainwater treatment device for bridges and rainwater manholes. More specifically, a rainwater treatment device for manholes on the side of bridges or roads is provided to filter and treat initial rainwater with particularly high non-point pollution, and at the same time, to the manhole side. A bridge and rainwater manhole initial rainwater treatment device that makes it easy to remove various foreign substances adsorbed on the screen net inside each hole depending on the amount of rainwater flowing in, thereby eliminating clogging of the manhole and increasing the sludge filtration efficiency of various floating substances. It's about.

In general, pollutants include point pollutants discharged from point sources with a clear and limited discharge point, such as domestic sewage, industrial wastewater, and livestock wastewater, and agricultural land, pasture land, forest land, construction sites, mines, logging sites, waste treatment plants, landfills, urban areas, roads, and other pollutants. It can be divided into non-point pollutants discharged from non-point pollutants with a wide discharge area, such as industrial sites.

Among the pollutants above, in the case of point pollutants with a clear and limited discharge point, separate purification devices or wastewater treatment facilities are installed in homes, factories, livestock farms, etc. to purify the pollutants to some extent, but in the case of non-point pollutants, suspended solids Because the outflow and discharge routes are not clearly distinguished, collection is difficult, and the amount of generation/discharge is greatly influenced by weather conditions such as precipitation, making it difficult to design and maintain treatment facilities.

Moreover, early rainwater included in non-point pollution sources includes various suspended substances that have a negative impact on the ecosystem, such as organic suspended substances, heavy metals such as cadmium, bacteria, oil components, and eutrophic salts such as nitrogen and phosphorus.

In particular, on city bridges and roads in urban areas, there is a strong tendency for pollutants to accumulate due to tire wear caused by the driving of various vehicles and combustion of internal combustion engine fuel, and this is due to the manholes (catchment wells) provided on the roadside or bridge side during the initial rainstorm. In many cases, sewage treatment is carried out in a highly polluted state, as well as the backflow phenomenon of clogged manholes due to the inflow of wastewater or fallen leaves from street trees.

Accordingly, the number of facilities that filter highly polluted early rainwater through separate rainwater treatment devices and discharge it into sewage is gradually increasing, but in reality, the basic treatment of initial rainwater is through manholes provided throughout roads and bridges. can be said to be very important.

For initial rainwater treatment within manholes on roads, etc. as described above, the present applicant also applied for Republic of Korea Patent No. 10-1332781 (name: Bridge and Stormwater Manhole Initial Stormwater Treatment Device, hereinafter referred to as ‘patent document’). It has been registered.

The above patent document is designed to effectively filter out various suspended solids in the process of draining the initial rainwater containing various suspended solids after it starts raining, and at the same time, prevents blockage of sewer pipes along with smooth drainage of the initial rainwater.

Looking at the configuration, it is installed on a bridge or manhole with an inlet through which initial rainwater flows in and an outlet through which purified treated water is discharged. A rainwater inlet is formed at the top to allow filtration of the initial rainwater, and some of the sides are open. It is a body and a filter medium with good microbial adhesion and water permeability, and is installed in an open position on some of the four sides of the center of the body, and has several filter holes to discharge the initial rainwater or to filter and discharge suspended solids mixed with the initial rainwater. A perforated filter-type screen net is provided in the center of the body, and an overflow pipe is installed to smoothly discharge rainwater secondary when there is a large amount of rainwater, and is formed on the outer periphery of the overflow pipe, so that when water falls vertically, fine contaminants are collected. It consists of a floating backflow prevention member that prevents floating objects from floating, and an adjustment member at the bottom of the body that allows the height and horizontal adjustment of the body and forms a rainwater guide space.

The patent document structured as described above states that the initial rainwater coming through the rainwater treatment device is filtered through a filter-type screen net and discharged, but a large amount of sludge is contained on the inner wall of the filter-type screen net, that is, the filter hole portion. There was a problem in that it was adsorbed and became a factor that interfered with filtration, and even easily flowed back from the manhole.

In other words, the phenomenon of backflow as filtration efficiency decreases is becoming a factor in causing another safety accident.

In addition, problems have been pointed out that the noise generated when rainwater flows into the body is severe, and the body is deformed in the process of increasing the amount of rainwater flowing into the body.

Since it is not easy to lift the body from the manhole for cleaning or overall replacement of the filter-type screen net in the future, there is a disadvantage that it is not easy to clean suspended matter and sediment within the body.

Korean Patent No. 10-1332781 (registered on November 19, 2013)

The present invention was invented to solve the conventional problems as described above, and is equipped with a manhole rainwater treatment device on the side of a bridge or road to filter and treat initial rainwater with a particularly high degree of non-point pollution, and at the same time, to the manhole side. Depending on the amount of rainwater flowing in, various foreign substances adsorbed on the screen net inside each hole can be easily removed, thereby eliminating clogging of manholes and improving the sludge filtration efficiency of various floating substances. The purpose is to provide.

Another purpose of the present invention is to easily lift the screen net to the outside from the manhole so that individual cleaning management and replacement can be easily performed.

According to the present invention to achieve the above object, it is installed in a rainwater manhole on the side of a bridge or road, and a rainwater inlet is provided at the top to receive and filter rainwater flowing in through the grating on the upper side of the manhole, and a portion of the circumference on the upper side is on all sides. It has an open body and a filter medium with good microbial adhesion and permeability, and the outside is installed in an open position on all four sides of the center of the body to discharge initial rainwater or to filter and discharge suspended solids mixed with initial rainwater. A filter-type screen net with several filter holes perforated, an overflow pipe installed in the center of the body to secondarily discharge rainwater smoothly when the amount of rainwater is large, and an overflow pipe formed on the outer periphery of the overflow pipe so that when water falls vertically, In the initial rainwater treatment device for bridges and stormwater manholes, which includes a floating material backflow prevention member that prevents fine contaminants from floating,

A plurality of guide pieces for concentrating the inflow of rainwater are protruding from the rainwater inlet, and depending on the level of rainwater flowing in on the overflow pipe, the suspended matter floats or falls from the backflow prevention member and is adsorbed to the inner diameter of the filter-type screen net. As a buoyancy body to scrape and remove the accumulated sludge, a ring portion is formed in the center that loosely penetrates the overflow pipe, and at the outer periphery of the ring portion, the ends are in contact with or spaced apart from the inner diameter of the filter-type screen net. A sludge removal member is provided with propeller-type wings that move and rotate in an up and down direction according to the water level. At the lower part of the body, a rainwater guide space is formed from the inner bottom of the manhole, and the body is elastically adjusted according to the weight of the incoming rainwater. Fixing plates are provided at the top and bottom to support the device, and a support device with a compression spring connected between the fixing plates is provided at multiple points.

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In the bridge and rainwater manhole initial sewage treatment device according to the present invention, the initial rainwater flowing in through the grating of the bridge or road manhole is filtered through a filter-type screen net provided in the body of the initial rainwater treatment device, and suspended solids and The sediment is collected in the lower part of the body, and the various sludges filtered through the filter-type screen net and adsorbed on the filter side are lifted and rotated by the sludge removal member by their own buoyancy along the vertical overflow pipe according to the water level of the rainwater. By scraping off the sludge attached to the screen mesh through movement, it provides the effect of minimizing clogging and maintaining the filterability of rainwater. The multiple supports provided at the bottom of the body provide a buffering effect and reduce noise. It has the effect of preventing damage to the body due to changes in rainwater inflow and smoothing the discharge of purified water by maintaining the gap between the body and the inner floor of the manhole.

Figure 1 is a perspective view showing a part of a bridge with a manhole at the edge of the road,
Figure 2 is a perspective view showing a rainwater treatment device applied inside a manhole according to the present invention;
Figure 3 is a cross-sectional view showing an example of the rainwater treatment device according to the present invention applied to a manhole;
Figure 4 is a perspective view showing an excerpt of the overflow pipe and sludge removal member in Figure 3;
Figure 5 is a cross-sectional view showing an example in which the sludge removal member is raised according to the water level inside the manhole according to the present invention;
Figure 6 is a cross-sectional view illustrating the state in which the rainwater treatment device is withdrawn from the manhole according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle of definability.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing this application, they can be replaced. It should be understood that various equivalents and variations may exist.

The initial rainwater treatment device for bridges and stormwater manholes according to the present invention will be described with reference to the attached Figures 1 to 6 as follows.

As shown in the attached FIGS. 1 and 2, a rainwater inlet (11) is installed at the top of a manhole (1) on the side of a bridge or road to receive and filter rainwater flowing in through the upper grating (2) of the manhole. It is provided with a body 10 with a portion of the circumference open in all directions on the upper side, and a filter medium having microbial adhesion and water permeability, the outside of which is installed in a position where a portion of the central four sides of the body 10 are open, providing initial rainwater. A filter-type screen net (20) perforated with several filter holes (21) so that suspended matter mixed with the initial rainwater can be filtered and discharged, and a secondary rainwater system in the center of the body (10) when the amount of rainwater is large. It includes an overflow pipe (30) installed to smoothly discharge water, and a floating material backflow prevention member (40) formed on the outer periphery of the overflow pipe (30) to prevent fine contaminants from floating when water falls vertically. In bridge and rainwater manhole initial stormwater treatment devices,

A plurality of guide pieces 13 that concentrate the inflow of rainwater are protruding from the rainwater inlet 11, and the upper end of the overflow pipe 30 is at a height corresponding to the inclined surface of the rainwater inlet 11, that is, the above-mentioned It is installed vertically through the center of the body so that it can be positioned higher than the top of the filter-type screen net (20).

That is, through the top of the overflow pipe 30, when the level of rainwater filled in the body 10 approaches the line of the rainwater inlet 11, it can be discharged directly through the overflow pipe 30. will be.

The lower end of the overflow pipe 30 is designed to discharge rainwater that overflows through the body toward the treated water outlet 1a provided at the inner bottom of the manhole 1.

The guide piece 13 on the side of the rainwater inlet 11 is inclined toward the center and is formed to protrude at an angle on the inclined surface through which rainwater can smoothly flow into the circular rainwater inlet 11 at the center.

On the overflow pipe 30, there is a sludge removal member ( 50) is provided.

The body 10 is made of a corrosion-resistant stainless steel plate, and at the bottom, a rainwater guide space 1-1 is formed from the inner bottom of the manhole 1, and the body 10 is elastically adjusted according to the weight of the rainwater flowing in. Supporting supports (60) are provided at multiple points.

Between the outside of the body 10 guided to the manhole 1 and the inside of the manhole 1, treated water is provided through a filter-type screen network 20 to guide the treated water to the rainwater guide space 1-1. A space (1-2) is formed.

In the above configuration, the sludge removal member 50 is a buoyancy body and has a ring portion 51 formed in the center that loosely penetrates the overflow pipe 30, and an end of the ring portion on the outer periphery of the ring portion is a filter. A propeller-type wing portion 52 is formed that is in contact with or spaced apart from the inner diameter of the type screen net 20 and moves and rotates in the vertical direction depending on the water level of the rainwater.

The inner diameter of the ring portion 51 is looser by about 5 to 8 mm than the outer diameter of the overflow pipe 30, and the wing portions 52 are formed in two or three pieces.

The center of the filter-type screen net 20 for the sludge removal member 50 is formed in a circular shape, and as shown in the drawing, the outside is formed in a square shape according to the shape of the body.

The support 60 is provided with fixing plates 61 at the top and bottom, and a compression spring 62 is connected and installed between the fixing plates to elastically support the body.

Meanwhile, a jaw 12 is provided at the upper edge of the body 10, and the jaw 12 is further provided with a lifting hook 14 for lifting the body 10 from the manhole 1.

For reference, the floating material backflow prevention member 40 has a shape close to a cone with an inner diameter that increases from the top to the bottom, and various floating materials mixed with the initial rainwater collide with the inner surface of the floating material backflow prevention member 40. By doing so, it performs the function of preventing various floating substances from flowing back.

Meanwhile, the manhole shown is a manhole provided in the bridge shown in FIG. 1, and the manhole on the road side is usually formed with a pipe through which rainwater can be distributed, which guides the components including the body as described above. Installation is all the same.

The operation of rainwater filtration through the rainwater treatment device of the present invention configured as described above is described as follows.

As rain begins to fall, the initial rainwater flows into the manhole (1) through the grating (2) provided on the roadside, and the initial rainwater flows through the rainwater inlet (11) of the body (10) located below the grating (2). It flows into the initial storm water treatment device of the present invention along with various suspended solids.

The initial rainwater entering the rainwater inlet 11 begins to fill the inside of the body 10 as it moves inside the body 10 along with various floating substances.

At this time, rainwater and suspended matter entering through the rainwater inlet 11 flow more smoothly into the center along the guide piece provided at the rainwater inlet.

When more than a certain amount of rainwater is filled inside the body 10 in the above state, it is filtered through the filter-type screen net 20 installed on all four sides of the body 10 and collected on the inside of the body 10. It is discharged through the treated water outlet (1a) at the bottom of the manhole (1) through the guidance space (1-2) and the rainwater guidance space (1-1).

On the other hand, when the body 10 is filled with rainwater as described above, the sludge removal member 50 provided to be able to move up and down in the overflow pipe 30 is raised, and when the water level is lowered, the sludge removal member 50 is lowered again. It comes true.

When the sludge removal member 50 moves up and down, the ring part 51 is guided along the overflow pipe 30, and the wing part 52 is in the form of a blade, so that the filter-type screen net 20 is rotated. It moves while scratching the inner diameter of the.

In the above operation, the wings 52 of the sludge removal member 50 scrape off the adsorbed sludge while filtering on the inner diameter of the filter-type screen net 20, so that the initial excellent filtration efficiency can be maintained as much as possible. do.

Since the inner diameter of the sinking ring portion 21 is applied in a loose state compared to the outer diameter of the overflow pipe 30, the spring net ( In 20), the sludge can be thrown off due to friction with the sludge by repeating the operation of contacting or separating the end of the wing portion 52.

While the filter medium disposed inside the filter-type screen network 20 has excellent microbial adhesion and water permeability, the sludge removal member 50 gradually prevents the filter hole 21 from being clogged with sludge as the water filtration progresses. Since the wings 52 rotate and float or fall depending on the water level of rainwater to remove sludge, filtration performance can be maintained and the replacement cycle of the filter medium can be significantly increased.

As described above, according to the inflow of rainwater concentrated inside the body 10, the body is provided at the bottom from the manhole 1 and has a buffering effect by the support 60 supported on the inner floor of the manhole 1. It is an offset action that reduces vibration, which has the effect of reducing rainwater discharge noise, which minimizes deformation applied to the body.

In the end, various floating substances mixed with the initial rainwater as described above are filtered by the filter-type screen net (20), and foreign substances with a large specific gravity are accumulated in the lower part of the body (10).

As described above, various floating matters filtered through the filter-type screen net (20) and accumulated on the bottom surface gradually rise due to the vertical fall of rainwater, and the floating matter backflow prevention member provided on the outer periphery of the overflow pipe (30) It hits the inner surface of the bottom side of the body 10 and goes down to the bottom inside the body 10, that is, the floating matter backflow prevention member 40 prevents various types of floating matter from flowing back as much as possible.

When rainfall increases and the inflow of rainwater increases, rainwater fills up to the top of the body (10) and discharge treatment does not proceed smoothly. The top of the overflow pipe (30) installed in the center of the body (10) Rainwater is discharged to

This overflow of rainwater performs the function of preventing rainwater from overflowing onto the road surface and causing various accidents (car accidents, etc.).

Meanwhile, in the internal management of the manhole (1), in order to clean the contaminants and screen net accumulated in the body, the lifting ring (14) provided on the ledge (12) of the body (10) after the grating is separated as shown in the attached FIG. ) can be lifted and taken out to the outside, then the screen net 20 can be cleaned, or the old screen net can be replaced and placed back inside the manhole for use, making it possible to manage the maintenance of the rainwater treatment device more efficiently. Benefits are provided.

As described above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but this is only provided to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , those skilled in the art can make various modifications and variations from this description.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and the scope of the patent claims described below as well as all things that are equivalent or equivalent to the scope of the claims will be said to fall within the scope of the spirit of the present invention. .

1: Manhole 1-1, 1-2: Stormwater information space
1a: Treated water outlet 2: Grating
10: Body 11: Storm water inlet
13: Guide 14: Lifting hook
20: filter type screen net 21: filter hole
30: Overflow pipe 40: Floating material backflow prevention member
50: Sludge removal member 51: Ring part
52: Wing 60: Support
61: Fixing plate 62: Compression spring

Claims (4)

It is installed in a manhole (1) on the side of a bridge or road, and a rainwater inlet (11) is provided at the top to receive and filter rainwater flowing in through the grating (2) on the upper side of the manhole, and a portion of the perimeter on the upper side is open in all directions. The body 10 and a filter medium having microbial adhesion and water permeability, the outside of which is installed in an open position on some of the central four sides of the body 10 to discharge initial rainwater, or filter and discharge suspended solids mixed with initial rainwater. A filter-type screen net (20) with several filter holes (21) perforated thereto, and an overflow pipe (30) installed in the center of the body (10) to secondarily discharge rainwater smoothly when the amount of rainwater is large. , In the bridge and stormwater manhole initial stormwater treatment device comprising a floating material backflow prevention member 40 formed on the outer periphery of the overflow pipe 30 to prevent fine contaminants from floating when water falls vertically,
A plurality of guide pieces 13 are formed to protrude from the rainwater inlet 11 to concentrate the inflow of rainwater, and floating material from the backflow prevention member 40 is formed on the overflow pipe 30 according to the level of the rainwater flowing in. A ring portion 51 loosely penetrating the overflow pipe 30 is formed at the center as a buoyancy body to scrape and remove sludge adsorbed on the inner diameter portion of the filter-type screen net 20 while falling. The sludge removal member (50) has a propeller-type wing portion (52) formed on the outer periphery, the end of which is in contact with or spaced apart from the inner diameter of the filter-type screen net (20), and moves and rotates in the up and down direction according to the water level of the rainwater. ) is provided at the lower part of the body 10, and a rainwater guide space 1-1 is formed from the inner bottom of the manhole 1 and is fixed to the upper and lower parts to elastically support the body 10 according to the weight of the inflowing rainwater. A bridge and rainwater manhole initial stormwater treatment device, characterized in that a plate (61) is provided and a support (60) with a compression spring (62) connected and installed between the fixing plates is provided at multiple points. delete delete delete

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