KR101356964B1 - Catchment well for road - Google Patents

Abstract

The present invention relates to a catchment well for a road, wherein the catchment well is capable of filtering foreign matters from rainwater, capturing and collecting oil constituents from the rainwater, and allowing a drain pipe made of concrete to be directly and firmly connected to a rainwater drain connection pipe made of a metal material. The catchment well comprises: a catchment well main body shaped into a rectangular parallelepiped of which the upper side is opened; a rectangular parallelepiped case having an opened upper side and inserted into the main body; a partition vertically installed at one side inside the case, placed forwards and backwards, having a rainwater passing opening part formed from the center of the lower side thereof to the rear side thereof, and having a front vertical blocking plate formed at the front of the lower side thereof; a filtering part formed at the other side on the basis of the partition, discharging the rainwater to the rainwater passing opening part after filtering and removing the foreign matters from the rainwater flowing from the upper side thereof, and then removing the oil constituents from the rainwater; a draining part formed at one side on the basis of the partition and draining the rainwater flowing into the same; the drain pipe penetrating the main body, connected to communicate with the draining part, and draining the filtered rainwater; and a rainwater inlet installed at the upper side of the case and allowing the rainwater to flow into the filtering part.

Description

Road Sump {CATCHMENT WELL FOR ROAD}

The present invention relates to a road collecting well, and more specifically, it is possible to filter out foreign substances contained in rainwater, and to collect and recover oil components contained in rainwater, and the concrete drain pipe is composed of a metal material. It relates to a road sump well that can be directly and firmly connected to the storm drain pipe.

In general, a water collecting well is a structure that is constructed on roads or other facilities to collect rainwater or cleaning water (hereinafter referred to as "excellent") and discharge it to a river or a nearby drainage channel. In addition, the conventional water collecting well has a main body formed by digging on the ground surface or pavement surface and constructing an inner wall to collect rainwater, a drain pipe communicating with the main body and connected to a river or a peripheral drainage channel, and installed at an upper end of the main body to be a pedestrian or a vehicle. Includes a cover that forms the support surface of the filter and filters foreign matter contained in the rainwater.

The main body constituting the sump is generally formed with a concrete mortar is poured into the inner wall of the groove portion which is concave from the ground to form a space in which rainwater is fresh. And, the drain pipe is connected to the circumferential surface of the main body, the bottom surface of the drain pipe is disposed higher than the bottom surface of the main body so that the rainwater flowing into the main body is fresh water from the bottom surface of the main body, the water surface of the rainwater is the bottom surface of the drain pipe If it rises above, it is discharged along the drain pipe. In addition, the cover is made of a metal material to support the weight of the pedestrian or vehicle passing through the sump, and made of a sieve shape so as to filter foreign matter contained in the rainwater is mounted on the top of the body.

Thus, the Korean Utility Model Registration No. 0318205 "Road Sump" (hereinafter referred to as "conventional Road Sump") is known as an example of the conventional sump.

Conventional road catchment wells are provided between the catchment main body, which is buried between sewage pipes and the drainage is temporarily collected, the grating covering the inlet of the catchment main body, and installed on the gratings of the grating to be subjected to a load above a certain load thereon. It includes a blocking plate that is only opened when the load is not reached the predetermined load is maintained in a closed state.

In addition, the conventional road sump well further includes a filter to be inserted and detachable through an inlet of the sump main body to filter dirt contained in the drainage.

By the way, the conventional road sump is configured as described above can be removed by filtering the large foreign particles in the rainwater, but the oil component contained in the rainwater can not be removed at all due to the inflow of oil components It had a problem of polluting water quality such as rivers.

In addition, according to the conventional road water well, the sewage pipe made of concrete penetrates into the water collecting well body made of concrete. By this damage, there was a problem that water leakage occurs in the damaged portion.

In addition, if water leaks around the through-hole of the water collecting well body, which is the connection portion between the sewage pipe and the water collecting well body as described above, the sewage pipe is freezes and drains frequently due to the leaked water in winter. there was.

Republic of Korea Utility Model Registration No. 0318205 "Road Collection Revision" (2003.06.17)

Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

It is an object of the present invention to provide a road sump that can filter foreign substances contained in rainwater, as well as collect and recover oil components contained in rainwater.

In addition, another object of the present invention, the first to collect and remove the sediment and suspended matter such as mud contained in rainwater, and then collect and recover the oil components contained in the rainwater to improve the recovery efficiency of the oil component more In providing a sump.

In addition, another object of the present invention, by connecting the drain pipe made of concrete directly to the rainwater discharge pipe made of a metal material directly, to prevent the sedimentation of the drain pipe due to sedimentation, it is excellent The present invention provides a road sump to prevent leakage caused by drainage from the drain connection pipe.

In addition, another object of the present invention is to provide a water collecting well that can prevent the rainwater flowing into the upper part of the case to be accurately introduced into the rainwater collecting portion to prevent the efficiency of filtering the rainwater is lowered.

"Road collection well" according to the present invention to achieve the above object is, the top of the rectangular shape of the sump well body is open; A case configured to have a rectangular parallelepiped shape and having an upper portion opened and inserted into the main body; A partition plate provided vertically in the front-rear direction on one side of the inside of the case, from the center of the lower portion to the rear of the rain passage, and having a front vertical blocking plate formed at the front of the lower portion; A filtering unit formed at the other side with the partition plate as a boundary and filtering and removing foreign substances contained in rainwater flowing in from the top, collecting and collecting oil components contained in the rainwater, and then discharging them into the rainwater passage opening; A drain part formed at one side with the partition plate as a boundary and draining rainwater flowing into the interior; A drain pipe connected to the drainage part through the sump body to drain the filtered rainwater; A rainwater inlet provided at an upper portion of the case to allow rainwater to flow into the filtering unit; .

In addition, the filtering portion of the "road water collecting well" according to the present invention is formed in a horizontal portion immediately above the rainwater passage opening to partition the filtering portion, and the horizontal block plate is formed on one side and the other plate is formed with a perforated plate on the other side; A vertical partition plate vertically erected from the other side of the horizontal barrier plate, a vertical barrier plate formed at a lower portion thereof, and a perforated network formed at an upper portion thereof, and an excellent collecting unit formed at an upper portion of the horizontal barrier plate by the vertical partition plate; It is formed by the vertical partition plate on the upper portion of the perforated plate and a plurality of polymer filters are built in the lower portion, characterized in that it comprises an excellent filtering unit is provided with a filter box, the upper and lower portions are opened by the perforated network.

In addition, the drainage portion of the "road water collecting well" according to the present invention, a horizontal partition plate is formed horizontally immediately above the rainwater passage opening portion and the rainwater passage portion is formed from the center to the rear and the front horizontal blocking plate is formed in the front, A horizontal perforation network provided horizontally to block the upper part of the drainage from the upper end of the partition plate to filter out large foreign substances mixed in rainwater, and a rear end of the front vertical blocking plate formed in front of the lower part of the partition plate; The front and bottom and one side in front of the vertical boundary plate which is provided perpendicular to the rear end of the front horizontal blocking plate, the lower side of the one side of the case that is outside the front vertical blocking plate, the front horizontal blocking plate and the vertical boundary plate A drain pipe connection space formed to be opened, and formed in the drain pipe connection space and formed at the center of the vertical boundary plate. The drain tube of a metal material that is connected to superior discharge tube is fixed, includes, and is provided to be through to the lower side of the front the water collection unit is characterized in that the insert connected to the solid discharge pipe connection.

In addition, the rainwater inlet of the "road water collecting well" according to the present invention, is provided in the upper portion of the inside of the case, the upper portion is open, the lower portion is formed in the rainwater inlet immediately in the upper portion of the rain collecting portion and the inner side on both sides of the lower portion Rainfall inlet hopper which is formed in the symmetrical symmetrical plate is formed so that the lower portion is narrow and the upper portion is wide, and the grating is provided on the upper portion of the inside of the rainwater inflow hopper to filter large foreign substances mixed in rainwater, characterized in that it comprises do.

The present invention as described above, by filtering and removing the foreign matter contained in the rainwater, as well as by collecting and recovering the oil component contained in the rainwater, by draining the rainwater from which the foreign matter and oil components are removed to prevent pollution of the river It has the effect of providing a conventional road sump.

In addition, the present invention, by first collecting and removing precipitates and suspended matter such as mud contained in rainwater, and then collect and recover the oil components contained in the rainwater, there is also an effect that can further improve the recovery efficiency of the oil components. .

In addition, according to the present invention, by directly connecting the drain pipe made of concrete directly to the rainwater drainage pipe made of metal, the drainage pipe is prevented from sinking due to sedimentary sedimentation so that the drainage pipe is separated from the rainwater drainage pipe and leaks. By preventing the occurrence of the in advance, it is possible to prevent the contamination of the soil due to leakage, as well as to prevent the freezing of the drain pipe due to the winter leakage.

In addition, the present invention also has an effect of preventing the rainwater flowing into the upper part of the case to be accurately introduced into the rainwater collecting portion to prevent the efficiency of rainwater filtering is lowered.

1 shows a road collecting well of the present invention,
1A is a perspective view,
Figure 1b is a partial cutaway perspective view showing the inside.
Figure 2 is an exploded perspective view showing a road collecting well of the present invention.
3 is a cross-sectional view taken along the line AA of FIG.
4 is a cross-sectional view taken along line BB of FIG. 1A.
5 is a cross-sectional view taken along line CC of FIG. 4.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a view showing a road collecting well of the present invention, FIG. 1A is a perspective view, and FIG. 1B is a partially cutaway perspective view showing the inside thereof. 2 is an exploded perspective view showing a road collecting well of the present invention, FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 1A, FIG. 4 is a cross-sectional view taken along the line B-B of FIG. 1A, and FIG. 5 is a cross-sectional view taken along the line C-C of FIG. 4.

As shown in the drawing, the road sump well of the present invention includes a sump main body 1 having an open upper portion, a case 2 inserted into the sump main body 1, and a case 2. A partition plate formed vertically in the front-rear direction and passing the rainwater from the lower side (hereinafter, the right side is referred to as "one side" in the drawing and the other side is referred to as "other side" in the drawing). 3), a filtering part 4 formed on the other side with the partition plate 3 as a boundary to filter the rainwater introduced therein, and a drain part 5 formed on the other side of the partition plate 3 to drain the rainwater. ), A drain pipe 6 penetrating through the sump body 1 and connected to the drainage part 5, and a rainwater inlet part 7 provided at an upper portion of the case 2.

The water collecting well body (1) is to be installed on the road or other facilities, it is configured in the shape of an open top of the cube, such a water collecting well body (1) is already known and its detailed description will be omitted.

In addition, the case 2 according to the present invention is inserted into and installed in the water collecting well body 1, and is configured in a rectangular parallelepiped shape corresponding to the internal space of the water collecting well body 1. In addition, the case 2 has an open top, and includes a front plate, a rear plate, both side plates, and a lower plate. In addition, the case 2 is preferably made of a stainless steel plate so as not to corrode moisture.

In addition, the partition plate 3 is vertically provided at one side of the inside of the case 2 in the front-rear direction and is open to communicate with both sides. The partition plate 3 is bordered on the partition plate 3. The filtering part 4 is formed at the other side of), and the drain part 5 is formed at one side of the partition plate 3. In addition, the rain passage opening 31 is formed in the rear from the center of the lower portion of the partition plate 3 through which the rain is passed from the filtering portion 4, the front vertical blocking plate 32 is formed in front of the lower portion It is.

In addition, the filtering unit 4 according to the present invention is formed on the other side with the partition plate 3 as described above, and removes and removes the foreign matter contained in the rainwater flowing from the upper and included in the rainwater It collects and removes the oil component to be removed and serves to discharge to the rain passage opening 31.

The filtering part 4 having such a role includes a horizontal partition plate 41 formed horizontally directly above the rain passage opening part 31 to partition the filtering part 4 up and down. In addition, a horizontal blocking plate 411 is formed at one side of the horizontal partition plate 41, and a perforated plate 412 is formed at the other side of the horizontal partition plate 41.

The filtering unit 4 includes a vertical partition plate 42 that is vertically erected at the other side of the horizontal blocking plate 411, a vertical blocking plate 421 is formed at a lower portion thereof, and a perforated network 422 is formed at an upper portion thereof. And the rainwater collecting part 43 formed on the horizontal blocking plate 411 by the vertical partition plate 42 and on the perforated plate 412 by the vertical partition plate 42. Rainwater filtering unit 44 is included.

In addition, a plurality of polymer filters 442 are built in the lower part of the rain filtering unit 44, and upper and lower filter boxes 441 are opened by a perforation network. That is, the polymer filter 442 provided inside the filter box 441 may be composed of a polymer filter configured in the shape of a tube, or may be composed of a laminated polymer filter plate, a tubular polymer filter or a polymer filter plate. Is already known, it shows a state in which the laminated polymer filter plate is installed in the figure.

In addition, the drain portion 5 according to the present invention is formed on one side with the partition plate 3 as a boundary to serve to drain the rainwater flowing into the inside.

The drainage portion 5, which serves as described above, is horizontally formed immediately above the rainwater passage opening 31, and a rainwater passage 511 is formed from the center to the rear, and the front horizontal blocking plate 512 is located in the front. The horizontal partition plate 51 is formed, and the horizontal perforated network 52 is provided horizontally to block the upper portion of the drain at the upper end of the partition plate 3 to filter out the large foreign matter mixed in the rainwater. That is, the horizontal perforated network 52 serves to inflow the rainwater filled in the case 2 directly into the drainage part 5 when the rainwater falls and the rainwater is filled in the inside of the case 2. The back particles pass through the rain while filtering large foreign matter.

And the drain portion 5 is provided to be perpendicular to the rear end of the front vertical blocking plate 32 formed in front of the lower portion of the partition plate 3 and the rear end of the front horizontal blocking plate 512. It further includes a vertical boundary plate 53.

In addition, the drainage portion 5 is in front of the lower side of the front side and the lower side and one side of the case 2, which is the outer side of the front vertical blocking plate 32, the front horizontal blocking plate 512 and the vertical boundary plate 53. The drain pipe connecting space 54 is formed to be open, and the drain pipe connecting space 55 is formed in the interior of the drain pipe connecting space 54 and fixed through the center of the vertical boundary plate 53. . The rain discharge pipe 55 is made of stainless steel, and is firmly fixed to the vertical boundary plate 53 by welding.

In addition, the drain pipe 6 is connected to communicate with the drainage part 5 through the sump body 1 to serve to drain the filtered rainwater, one side lower portion in front of the sump body 1 It is provided so as to penetrate into and inserted into the rain discharge pipe (55). In addition, the drain pipe 6 is made of concrete in which steel is embedded, and is firmly inserted into and connected to the rainwater discharge pipe 55 made of a metal material. In addition, an adhesive layer may be further provided between the outer circumferential surface of the rainwater discharge connection pipe 55 and the inner circumferential surface of the drain pipe 6 so as to firmly connect and fix the drain pipe 6 with an adhesive.

Accordingly, as described above, by directly and firmly connecting the drain pipe 6 made of concrete to the rainwater discharge pipe 55 made of metal, the drain pipe 6 is prevented from sinking due to sediment settlement. The drain pipe 6 is separated from the discharge connection pipe 55 to prevent the leakage occurs in advance.

Therefore, the road water well of the present invention can prevent the contamination of the soil due to leakage caused by the departure of the drain pipe 6, as well as the advantage of preventing the freezing of the drain pipe 6 due to winter leakage in advance. It is.

In addition, the rainwater inlet 7 according to the present invention is provided on the upper portion of the case 2 serves to introduce the rainwater into the filtering unit (4).

The rainwater inlet 7 having such a role is provided at an upper portion of the case 2, an upper portion thereof is opened, and a rainwater inlet hole 711 is formed directly at an upper portion of the rainwater collecting portion 43. Rainwater inflow hopper 71, and the grate 72 is provided on the upper portion of the rainwater inflow hopper 71 to filter out the large foreign matter mixed in the rainwater.

The rainwater inflow hopper 71 serves to introduce rainwater flowing from the upper portion through the rainwater inflow hole 711 into the rainwater collecting part 43. The lower portion of the lower portion is wider and the upper portion is wider. Since the inclined plate 712 is mutually symmetrical to be formed, it is possible to smoothly flow rainwater into the rainwater collecting portion 43. Therefore, the present invention also has the advantage that can be prevented in advance that the rainwater flowing into the upper portion of the case (2) accurately into the rainwater collecting portion 43 to reduce the efficiency of filtering rainwater.

Hereinafter, the operational relationship of the road sump well of the present invention will be described.

As shown in Figures 1 to 5, when describing the process of the rainwater is treated through the road water well according to the present invention, first, the rainwater injected from the top of the water collecting body (1) is the top of the case (2) The rainwater flowing into the rainwater inlet 7 provided in the rainwater flows into the rainwater inlet 7 and flows into the rainwater collecting part 43 constituting the filtering unit 4. And the rainwater flowing into the rainwater collecting portion 43 is filled from the bottom while the precipitate foreign matter contained in the rainwater is precipitated to the lower portion of the rainwater collecting portion 43, the floating foreign matter is provided on the other side of the rainwater collecting portion 43 The filter is filtered while passing through the perforated network 422 provided on the partition plate 42.

Next, the rainwater passing through the perforated network 422 flows into the rainwater filtering unit 44 constituting the filtering unit 4 and passes through the plurality of polymer filters 442 filled in the filter box 441. Falls. In the process of passing rainwater through the inside of the filter box 441, the oil component included in the rainwater is collected and recovered by the polymer filter 442, and the collecting action of the polymer filter 442 is already known. Description of the collecting action is omitted. Therefore, the rainwater flowing into the rainwater filtering unit 44 by filtering the foreign matter is collected and recovered in the process of passing through the filter box 441, the rainwater from which the oil content is removed falls to the bottom, and the rainwater falling is Passed through the perforated plate 412 formed on the other side of the horizontal partition plate 41 is collected below the horizontal partition plate 41.

Next, the rainwater collected into the lower portion of the horizontal partition plate 41 passes through the rainwater passage opening 31 formed from the center to the rear of the lower portion of the partition plate 3 to discharge rainwater provided in the drainage portion 5. Pass through the pipe 55 is to drain to the drain pipe (6).

On the other hand, in the process of draining the rainwater to the drain pipe 6, when the amount of rainwater flowing into the drainage portion 5 is large, the rainwater drainage portion through the rainwater passage 511 formed in the lower portion of the drainage portion 5 It may be filled in (5) and discharged through the drain pipe (6). That is, even when the amount of rainwater is large, the rainwater is stored and discharged from the drainage portion 5, so that the rainwater flowing into the drainage portion 5 may be reduced in the phenomenon of flowing back to the filter box 441.

 Therefore, the road collecting well of the present invention, as described above, the foreign matter contained in rainwater is first filtered out from the rainwater collecting portion 43, and the oil component contained in the rainwater is collected and collected through the filter box 441. By removing it, it is possible to prevent the pollution of the river by draining the rainwater from which foreign substances and oil components are removed.

More specifically, the road sump according to the present invention first collects and removes sediments such as mud contained in rainwater and removes it, and then collects and recovers the oil components contained in the rainwater, thereby improving the recovery efficiency of the oil components. There is an advantage that can be improved further.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

1: sump body
2: Case
3: partition plate
31: excellent passage opening
32: front vertical blocking plate
4: filtering unit
41: horizontal partition plate
411: horizontal blocking plate, 412: perforated plate
42: vertical partition plate
421: vertical blocking plate, 422: perforated network
43: excellent collecting part
44: excellent filtering unit
441: filter box, 442: polymer filter
5: drain
51: horizontal partition plate
511: rain passage, 512: front horizontal blocking plate
52: horizontal perforation network
53: vertical boundary plate
54: drain pipe connection space
55: storm drain pipe
6: drain pipe
7: rainwater inlet
71: rainwater inflow hopper
711: rainwater inlet hole, 712: inclined plate
72: grating

Claims (4)

A rectangular parallelepiped collecting basin 1 having an open top;
A case (2) configured in a rectangular parallelepiped shape and having an upper portion opened and inserted into the main body;
It is provided vertically in the front and rear direction on one side of the inside of the case 2, the rain passage opening portion 31 is formed from the center of the lower portion, the front vertical blocking plate 32 is formed in the front of the lower portion Plate 3;
It is formed on the other side with the partition plate 3 as a boundary, and filters and removes foreign substances contained in rainwater flowing in from the top, collects and collects and removes oil components contained in rainwater, and then passes to the rainwater passage opening 31. A filtering unit 4 for discharging;
A drain part 5 formed at one side with the partition plate 3 as a boundary and draining rainwater flowing into the interior;
A drain pipe 6 penetrating through the sump body 1 to communicate with the drain part 5 to drain the filtered rainwater;
A rainwater inlet (7) provided at an upper portion of the case (2) to allow rainwater to flow into the filtering unit (4); ≪ / RTI &
The filtering unit 4,
The horizontal partition plate 41 is formed horizontally just above the rain opening opening 31 to partition the filtering unit 4, and a horizontal blocking plate 411 is formed at one side thereof, and a perforated plate 412 is formed at the other side thereof. )and,
A vertical partition plate 42 which is vertically erected from the other side of the horizontal blocking plate 411, a vertical blocking plate 421 is formed at a lower portion thereof, and a perforated network 422 is formed at an upper portion thereof;
The rainwater collecting part 43 formed on the horizontal blocking plate 411 by the vertical partition plate 42,
Water filtering is formed in the upper portion of the perforated plate 412 by the vertical partition plate 42, a plurality of polymer filters 442 is built in the lower portion, and the filter box 441, the upper and lower portions are opened by the perforated network. A road collecting well characterized in that the portion (44).
delete A rectangular parallelepiped collecting basin 1 having an open top;
A case (2) configured in a rectangular parallelepiped shape and having an upper portion opened and inserted into the main body;
It is provided vertically in the front and rear direction on one side of the inside of the case 2, the rain passage opening portion 31 is formed from the center of the lower portion, the front vertical blocking plate 32 is formed in the front of the lower portion Plate 3;
It is formed on the other side with the partition plate 3 as a boundary, and filters and removes foreign substances contained in rainwater flowing in from the top, collects and collects and removes oil components contained in rainwater, and then passes to the rainwater passage opening 31. A filtering unit 4 for discharging;
A drain part 5 formed at one side with the partition plate 3 as a boundary and draining rainwater flowing into the interior;
A drain pipe 6 penetrating through the sump body 1 to communicate with the drain part 5 to drain the filtered rainwater;
A rainwater inlet (7) provided at an upper portion of the case (2) to allow rainwater to flow into the filtering unit (4); ≪ / RTI &
The drain portion 5,
A horizontal partition plate 51 formed horizontally immediately above the rain passage opening part 31 and a rain passage part 511 is formed from the center to the rear of the rain passage, and a front horizontal blocking plate 512 formed at the front;
A horizontal perforation network 52 provided horizontally to block the upper portion of the drainage portion 5 from the upper end of the partition plate 3 to filter out large foreign substances mixed in rainwater;
A vertical boundary plate 53 provided to stand vertically at the rear end of the front vertical blocking plate 32 and the rear end of the front horizontal blocking plate 512 formed in front of the lower portion of the partition plate 3;
A drain pipe connection space in which the front, the bottom, and one side of the front vertical blocking plate 32, the front horizontal blocking plate 512, and the lower side of the case 2, which are outside of the vertical boundary plate 53, are opened. Section 54,
It is formed in the drain pipe connecting space 54 and includes a rainwater discharge pipe 55 of the metal material which is fixed through the center of the vertical boundary plate 53,
The drain pipe (6) is provided to penetrate through the bottom of one side of the front of the water collecting body (1) is inserted into the rainwater discharge connection pipe (55), characterized in that the road.
The method according to claim 1 or 3,
The rainwater inlet 7 is,
It is provided on the inner upper portion of the case (2) and the upper portion is opened, the rain inlet hole 711 is formed directly on the upper portion of the rain collecting portion 43, the inner side is formed on both sides of the lower portion is narrow and the upper portion is wide Rainfall inlet hopper 71 and the inclined plate 712 is formed to be symmetrical to each other,
A grating 72 is provided on the upper portion of the rainwater inflow hopper 71 to filter out large foreign substances mixed in the rainwater.
Road sump, characterized in that it comprises.

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