JP5085052B2 - Rainwater outflow control drainage channel structure - Google Patents

Description

  The present invention relates to a rainwater outflow suppression drainage channel structure that drains and permeates rainwater and the like, and particularly relates to a rainwater outflow suppression drainage channel structure that can efficiently remove sand and the like flowing in with rainwater.

  Conventionally, a drainage channel structure as shown in FIG. 13 is known (see, for example, Patent Document 1).

  First, in terms of configuration, in this conventional drainage channel structure, the permeable pavement surfaces 4 and 4 are provided on the shoulders 2 and 2 provided on the side of the road 1 substantially covered with the impermeable pavement surface 3. It has been. Below the paved road surfaces 4 and 4 are buried block structures 6 and 6 into which rainwater that flows down on the paved road surface 3 flows through a crushed stone layer 5 buried in the ground.

  The block structure 6 flows in by a plurality of container-like members 7 being stacked in the upper and lower directions alternately in the vertical direction and aligned in the front, rear, left and right directions. A storage space for temporarily storing rainwater is formed.

  Next, the operation of this conventional drainage channel structure will be described.

  In this drainage channel structure, rainwater that has rained on the impervious paved road surface 3 flows down in the direction of the shoulders 2 and 2 provided on the side of the road 1, and the paved road surfaces 4, 4 having the water permeability, It flows into the block structures 6 and 6 through the crushed stone layer 5.

Then, since it gradually penetrates into the underground 8 and is drained, for example, even if heavy rain falls, it may flow into a river or a sewage treatment facility (not shown) at a time, and the processing may not be in time. I am trying not to.
JP 2000-160667 A (paragraphs 0005 to 0019, FIGS. 1 to 6)

  However, in such a conventional drainage channel structure, rainwater that has flowed into the storage space constituted by the block structures 6 and 6 is permeated into the underground 8 and drained on the spot.

  For this reason, the sand or sludge that flows along with the rainwater precipitates and accumulates on the bottom surface of the storage space during long-term use.

  These accumulated sand and sludge are difficult to remove from the bottom of the facility, and the amount of rainwater that can be stored decreases as the amount of accumulation increases.

  In addition, when a water permeable sheet is laid around the block structure 6, the water permeable sheet may be clogged by accumulated sand and sludge, and the function as a storage and penetration facility may be impaired.

  Then, this invention makes it a subject to provide the rainwater outflow suppression drainage channel structure which can store rainwater temporarily and has favorable maintainability.

In order to achieve the above-mentioned object, the invention described in claim 1 is formed in a drainage channel for guiding rainwater or the like and draining it, and a plurality of filling members are continuously provided. A rainwater outflow suppression drainage channel structure in which the downward direction of the rainwater flow of the inclined surface portion coincides with the flow direction of the drainage channel, and the fine particles contained in the rainwater flowing in the drainage channel at the terminal part of the drainage channel the have been eclipsed purification device set for removal from the rainwater, the the purifying apparatus, a flocculant for binding the magnetic particles and magnetic particles on the inflow rainwater from the drainage channel to the fine particles A first tank for mixing, and a second tank for collecting the fine particles combined with the magnetic particles of rainwater flowing in from the first tank by magnetic force. and a tank, the said second tank, A partition member for vertically partitioning the inside of the second tank, the partition member allowing water permeation and blocking the passage of binding particles; and a partition member in a region below the partition member; An outflow port for flowing out the permeated rainwater to the outside is provided, and in the upper region of the partition member, the inflow port of the rainwater from the first tank, and the coupled particles that flowed into the second tank together with the rainwater A collecting member composed of a cylindrical roller made of a strong permanent magnet for collecting particles, a sawing member for scraping the binding particles accumulated on the roller, and a joint scraped by the sawing member A discharge port for discharging particles to the outside is provided.
Further, in the invention described in claim 2, the drainage channel is embedded in the ground along a lateral groove, and a manhole into which rainwater flowing in the drainage channel flows is provided at a terminal portion of the drainage channel, The purification device is connected to the manhole.

  According to the first aspect of the present invention configured as described above, when rainwater is collected in the drainage channel due to rain, the rainwater flows down the inclined surface portion formed in the filling member in the drainage channel. The sand and sludge that flowed in along with the direction of rainwater move along the direction.

  Since the inclined direction of the inclined surface portion coincides with the flow direction of the drainage channel, sand and sludge can be collected in one place by moving in one direction along the drainage channel without accumulating. .

  For this reason, since the collected sand, sludge, etc. should just be removed in one place, maintainability is favorable.

  Further, a purification device for removing fine particles such as small sand contained in the rainwater flowing in the drainage channel from the rainwater is provided in the drainage channel.

  Fine particles contained in rainwater flowing in the drainage channel are less likely to settle than sand and dust, which are relatively large in size, and are likely to float in rainwater, so that many of them are guided by the inclined surface of the filling member. Therefore, without being collected in one place, it is taken to rainwater and flows into, for example, a river or a sewage treatment facility.

  On the other hand, according to the present invention, since the purification device is provided in the drainage channel, the fine particles contained in the rainwater are removed from the rainwater in the process of flowing through the drainage channel by the purification action of the purification device. Therefore, it is possible to reliably suppress the fine particles contained in the rainwater from flowing into the river or the sewage treatment facility together with the rainwater.

Further, purification apparatus is, since it is provided in the end portion of the drainage channel, rainwater flowing drainage channel is in the purifier after the most large sand and dust contained therein is integrated into drainage channel Inflow. As a result, compared with the case where the rain water flowing into the purification device contains large sand and dust, the reduction in the capacity of the purification device can be surely reduced, so that the durability of the purification device is reliably improved. be able to.

Furthermore, purification of apparatus, the rain water that has flowed from the drainage channel and a flocculant for binding the magnetic particles and magnetic particles to fine particles mixed respectively, the fine particles bound with the magnetic particles accumulate by magnetic force.

  Conventionally, in order to separate fine particles contained in rainwater from rainwater, the core foreign matter and the polymer flocculant are mixed into the rainwater flowing through the drainage channel, and the foreign matter is bound to the fine particles by the polymer flocculant. Thus, it has been proposed to add weight to fine particles and to precipitate fine particles by gravity. However, in order to precipitate and collect fine particles by gravity, not only a large amount of polymer flocculant is required, but it is also necessary to wait for the aggregate to settle, making it difficult to determine the maintenance timing. If the maintenance period is early, unnecessary collection increases the cost, and if the maintenance period is late, the purification function may be impaired. In addition, when heavy rain occurs between the precipitation and collection of fine particles, there is a risk that the precipitate will float or re-flow, and the foreign matter collection function may not be realized.

  On the other hand, according to the present invention, the amount of the magnetic particles to be bonded to the fine particles contained in the rainwater only needs to have magnetism as an aggregate, and does not require an amount to settle. As a result, the amount of the aggregating agent for binding the magnetic particles is small as compared with the case where a large amount of foreign matter is bound to the fine particles as in the prior art. Thereby, cost reduction can be aimed at.

Further, since the fine particles can be collected quickly after agglomeration by the magnetic force of the magnetic particles, there is no need to determine the maintenance time as in the prior art and there is no possibility of re-flowing before the collection. In addition, since only aggregates can be collected intensively, the amount of collected water is small, drying equipment and filtration equipment for volatilization are not required, and cost and space effects are also expected. Can do.
Further, in the second tank, the rainwater from the first tank is permeated and the passage of the binding particles is prevented by the partition member that divides the inside of the second tank up and down. Therefore, the rainwater that has passed through the partition member flows out from the lower region of the partition member through the outlet. In the upper region of the partition member, the coupled particles are accumulated on the cylindrical roller by a magnetic force. The binding particles accumulated on the roller are scraped off by the scoring member and discharged to the outside from the discharge port.
Therefore, since the fine particles are forcibly collected by applying a magnetic force to the fine particles bonded to the magnetic particles, the fine particles can be collected in a shorter time than when waiting for the precipitation of the fine particles as in the prior art. Can do. Thereby, the collection efficiency of the fine particles contained in the rainwater can be reliably improved as compared with the conventional case.
Furthermore, the magnetic particles can be separated from the binding particles collected by the roller, recovered, and reused, thereby reducing the cost.
According to the invention described in claim 2, the drainage channel is buried in the ground along the side groove. Moreover, the rainwater which flowed in the drainage channel flows into the manhole provided in the terminal part of the drainage channel. Then, purification is performed by a purification device connected to the manhole.

  Next, a rainwater outflow suppression drainage channel structure according to the best mode for carrying out the present invention will be described with reference to the drawings.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same or equivalent part as the said prior art example.

  1 to 12 illustrate a rainwater outflow suppression drainage channel structure according to an embodiment of the present invention.

  First, the configuration will be described. As shown in FIG. 2, this rainwater outflow suppression drainage channel structure is buried in the side grooves 11 and 11 of the road shoulder provided on the side of the road 1 in the grating portion (not shown) and in the ground. Through the communication pipes 12 and 13, drainage channels 14 and 15 as drainage channels are extended from the side grooves 11 and 11 along the extending direction of the side grooves 11 and 11 at a predetermined interval.

  These drainage channels 14 and 15 are configured to collect rainwater 16 or household miscellaneous drainage 18 discharged from the house 17 and guide it to a river 19 or a sewage treatment facility (not shown). And in these drainage channels 14 and 15, the several filling member 20 ... in which the inclined surface part which has the rainwater flow down direction corresponded with the flow direction of the drainage channel was integrally formed, and the storage space 21 was provided. It is configured.

  In Example 1 of this embodiment shown in FIGS. 1 to 5, the configuration of the drainage channel 14 will be mainly described, and the configuration on the drainage channel 15 side is substantially the same as the configuration on the drainage channel 14 side. Therefore, explanation is omitted.

  In the rainwater outflow suppression drainage channel structure of the first embodiment, as shown in FIG. 1, a plurality of filling members 20 are continuously provided in the drainage channel 14.

  As shown in FIGS. 4 to 6, the filling member 20 of the first embodiment is made of a synthetic resin material such as polypropylene, and has a fixed inclination angle (about about 1 in this first embodiment). A tilted plate portion 20a having a substantially square shape when viewed from above, and other filling members 20 which are integrally formed at the four corners of the tilted plate portion 20a and are continuously provided at the upper portion, and a reinforcing member which will be described later It has mainly four supporting leg portions 20b, 20b,... That support loads such as 30, 30, and the like.

  Among these, as shown in FIG. 5, the inclined plate portion 20 a is formed with a plurality of small holes that can communicate with air and rainwater in the vertical direction at regular intervals and one side of about 0.5 m, The thickness is set to about 4 to 5 mm, and it is configured to have a size and weight that can be carried by human power while giving a strength that does not bend even when a certain overload is applied.

  In addition, the inclined plate portion 20a is arranged between the support leg portions 20b and 20b located at both corners of one side so as to guide the rainwater that has flowed in the rainwater flow downward direction S indicated by the arrow in FIG. Are integrally fixed in an inclined state so as to descend between the support leg portions 20b, 20b on the opposite side.

  As shown in FIG. 6, a plurality of reinforcing rib portions 20 c... Having a lattice shape are formed on the back surface side of the inclined plate portion 20 a by being erected so as to be integrated vertically and horizontally at a predetermined interval. Has been.

  Each of the support leg portions 20b has a substantially right-angled isosceles triangle shape, is fitted inside the upper column portion 20d having a triangular cylindrical column shape, and is connected in a substantially triangular shape so as to be continuously provided. A lower pillar portion 20e is formed in which a piece is erected.

  Further, in the first embodiment, as shown in FIG. 4, it is mounted between the support leg portions 20b and 20b of the filling members 20 and 20 that are connected vertically, and the height position of the inclined plate portion 20a. Are provided with connecting members 28.

  The connecting member 28 has a triangular prism shape having a substantially isosceles right triangle shape when viewed from above, and an upper connecting portion 28a to which the lower column portion 20e is fitted and connected and a lower connection to which the upper column portion 20d is fitted. The part 28b is provided integrally.

  Further, the connecting member 28 has a projection 28c protruding from one of the two perpendicular surfaces 28e and 28f that are orthogonal to each other on one of the vertical surfaces 28e.

  Further, of the two orthogonal vertical surfaces 28e and 28f on the outside of the connecting member 28, the other vertical surface 28f is inserted and fitted with the joint convex portion 28c of another connecting member 28 arranged adjacent thereto. The joint hole 28d to be attached is formed as an opening, and is configured to be connectable by engaging the joint projection 28c of another connecting member 28 disposed adjacent thereto.

  And among these filling members 20..., The flat plate-like reinforcing members 30 corresponding to the respective filling members 20 are provided directly above the filling members 20 that are located at the uppermost portion and arranged in parallel in the vertical and horizontal directions. The upper connecting members 29 are mounted.

  The reinforcing member 30 of the first embodiment is made of a synthetic resin material such as polypropylene, and has a substantially square horizontal plate portion 30a as viewed from above, and a connecting plate portion welded to the back side of the horizontal plate portion 30a. 30b.

  Of these, the horizontal plate portion 30a has a side of about 0.5 m and is approximately the same size as the inclined plate portion 20a of the filling member 20, and is not easily bent even when an overload is applied from above. (In the first embodiment, about 2 to 5 mm or more), and is configured to have a size and weight that can be carried by human power.

  In addition, a plurality of small holes are formed in the horizontal plate portion 30a at predetermined intervals so that air and rainwater communicate with each other in the vertical direction.

  And the said connection board part 30b ... interposes the upper connection member 29 ... in the connection opening part of a substantially right-angled isosceles triangle shape formed in four corners of the lower surface side, and the upper column part 20d ... of the said filling member 20 is interposed. It is configured to be connectable.

  The upper connecting member 29 has a hollow triangular prism shape having a substantially right triangle shape in a top view. Further, on the upper and lower side surfaces of the upper connecting member 29, fitting portions 29a and 29a are fitted and connected to the connecting portion 30b of the reinforcing member 30 or the upper column portion 20b of the filling member 20. Are formed respectively.

  Further, a flange portion 29b is formed between the fitting portions 29a and 29a.

  And in this Example 1, as shown in FIG. 7, while being laid over the bottom face part and both side face parts so that the circumference | surroundings of the storage space 21 of the said drainage channel 14 may be covered, it shows in FIG. As described above, the filling members 20 are connected so that the rainwater flow downward direction S of the inclined surface portion 20a coincides with the flow direction of the drainage channel 14, and the connection members 28 are appropriately interposed along the vertical direction. They are stacked and connected.

  Further, in Example 1, a concave groove portion 24 formed in a concave shape as shown in FIGS. 8 and 9 is formed on the bottom surface portion of the drainage channel 14 located below the lowermost filling member 20. A concave groove member 23 is provided continuously between the lowermost connecting members 28 and 28.

  The concave groove member 23 has four corners cut out in accordance with the right-angled isosceles triangle shape of the connecting member 28, and the concave groove portions 24 are respectively provided at the four corners of the filling member 28 in plan view. Along the flow direction of the drainage channel 14 so as to communicate between the support leg columns 20b, 20b on the upstream side and between the support leg columns 20b, 20b on the downstream side of the leg columns 20b. Has been placed.

  A pair of mounting flange portions 25, 25 are formed along the outer edge of the inclined surface portions 26, 26 on both sides of the groove portion 24 of the groove member 23.

  The mounting flange portions 25 and 25 are immovable from below the filling members 20 by being sandwiched between the upper and downstream support leg portions 20b and 20b and between the lowermost connecting members 28 and 28, respectively. So that it is fixed.

  Further, as shown in FIG. 9, connecting flange portions 24 a and 24 b are integrally formed on the upper and downstream end edges of the groove member 23, and other connecting flanges arranged adjacent to each other in the flow direction S. It is comprised so that it may overlap with the parts 24a and 24b in the up-down direction.

  Further, in the first embodiment, as shown in FIG. 1, a gravel accumulation space 27 a is provided inside a part of the path of the drainage channel 14 between the filling members 28, 28 provided continuously along the flow direction. A provided hollow rectangular parallelepiped inspection manhole portion 27 is provided.

  An upstream outlet 27e is formed in the upstream side surface portion 27b of the inspection manhole portion 27 in the vicinity of the bottom surface portion 27d.

  In addition, the downstream side surface portion 27c of the inspection manhole portion 27 is inclined above the position where the upstream outlet 27e is formed at an opening, and the inclination of the filling member 20 provided at the highest position. A downstream inflow port 27f is formed at an upper position than the surface portion 20a. In addition, a drain side orifice 27h having the same height as the upstream outlet 27e and a smaller opening area than the upstream outlet 27e is formed on the downstream side surface portion 27c of the inspection manhole portion 27. ing.

  For this reason, the rainwater flows into the inspection manhole portion 27 through the communication pipe 12.

  For example, when the amount of rainfall is small, such as light rain, the drainage channel 14 constituted by the filling member 20 from the orifice 27h through the concave groove 24, and when the amount of rainfall increases, from the downstream inlet 27f. Rainwater flows into the area.

  And in this inspection manhole part 27, it is comprised so that an operator can go in / out from the inspection port 27g of an upper surface part.

Further, in the first embodiment, as shown in FIG. 3, the end portion 14 a of the drainage channel 14 is disposed in the vicinity of the endmost filling member 20 and has a hollow rectangular parallelepiped shaped inspection manhole. A portion 37 is provided.
A downstream outlet 37f is formed in the inspection manhole portion 37 at a position higher than the bottom surface portion 27d and at a position higher than the inclined surface portion 20a of the filling member 20 provided at the highest position. ing. Moreover, it is comprised so that an operator can enter / exit from the inspection port 37g of an upper surface part in the gravel accumulation space 37a provided in the inside.

Next, the effect | action of the rainwater outflow suppression drainage structure of this Example 1 is demonstrated.
In the rainwater outflow suppression drainage channel structure 13 of Example 1 configured as described above, when rainwater is collected in the drainage channels 14 and 15 due to rain, the filling member 20 in the drainage channels 14 and 15 is collected. The sand and sludge that flowed in along with the rainwater move along the rainwater flow downward direction S of the inclined surface portion 20a ... formed in.

  Since the inclination direction of the inclined surface portion 20a coincides with the flow direction of the drainage channels 14 and 15, sand and sludge move in one direction along the extending direction of the drainage channels 14 and 15 without accumulating. And accumulated in the groove 24 of the groove member 23.

  For example, in the first embodiment, the air flows from the upstream outlet 27e into the gravel accumulation space 27a of the inspection manhole part 27 having a hollow rectangular parallelepiped shape provided between the filling members 28 and 28.

  In the gravel accumulation space 27a, the downstream inflow port 27f is above the position where the upstream outflow port 27e is formed, and the inclined surface portion 20a of the filling member 20 provided at the highest position. It is formed in an upper position than.

  For this reason, only the supernatant of the rainwater that flows in flows out again from the downstream inlet 27f into the drains 14 and 15, and only sand or sludge accumulates on the bottom portion 27d and is collected at one place. Can do.

  Therefore, the collected sand or sludge can be removed at one place, so that maintainability is good.

上記表１は、図３に示す排水路１４の終端部１４ａと略同様の構成を有する実験装置を用いて行われた分離回収実験の結果である。

Table 1 above shows the results of a separation and recovery experiment performed using an experimental apparatus having a configuration substantially similar to that of the terminal end portion 14a of the drainage channel 14 shown in FIG.

  Here, the plurality of filling members 20 are stacked in 9 stages on the upper and lower sides, and the storage space 21 is formed by connecting 5 rows in a row to prevent the inflow of groundwater or the like from the surroundings, and storage is possible. It is surrounded by an acrylic plate so that you can do it.

  As an experimental condition, the inflow water amount was set to 4.6 L / min (injection amount: 1 cubic meter) as the inflow condition of water, and was set so as to reproduce the minimum rainfall and water collection area of a certain area.

  The amount of inflow sand was 1.3 kg (sand) / 1 square meter (water).

  From the "Sewerage Facility Planning and Design Guidelines and Explanation, Part 1, 2001", the inflowing sand is 0.05 square meters of sand per 1000 cubic meters of sewerage (density 2.65 x 10000 kg / cubic meter). Doubled concentration was set. The particle size of the sand is about 200 μ (median distribution).

  As an experimental procedure, first, water was injected at 4.6 L / min from the inspection port 37g of the inspection manhole part 37, and the water was discharged from the downstream outlet 37f. Sand was added to the inclined surface portion 20a of the filling member 20 provided at the highest position.

  And after completion | finish of inflow, the sand collected by the groove part 24 of the said groove member 23 was collect | recovered, the weight was measured after drying, and the recovery rate was computed.

  As is apparent from Table 1 as an experimental result, almost all of the inflowing sand is collected in the target concave groove 24, and it can be seen that the sand, which is the main cause of the reduced permeation function, can be separated and collected from rainwater.

  Further, it was confirmed that several percent of sand that was not collected remained on the inclined surface portions 20a of the filling members 20. Therefore, in the next rain (inflow rainwater), it is considered that the residual sand on the inclined surface portion 20a... Flows into the concave groove portion 24, and almost the entire amount is collected in the concave groove portion 24.

  Moreover, in this Example 1, the rain water collected in the storage space 21 in the drainage channels 14 and 15 is gradually infiltrated into the ground from the surrounding water-permeable sheet 22.

  For this reason, since the amount of rainwater flowing down to the river or the sewage treatment facility or the like directly through the drainage channel 14 can be reduced, there is a risk of deterioration of the function of the sewage treatment facility or the flooding of the river 19. Can be reduced.

  In addition, a plurality of filling members 20 are connected in the storage space 21 and the reinforcing members 30 are mounted on the upper surface portion as shown in FIG. Even if the upper side is a facility such as a road, it can withstand a certain load and can be supported from below by these filling members 20.

  For this reason, unlike the conventional adjustment pond, a separate installation space of a large area is not required, and the space along the side grooves 11 and 11 of the road shoulder which is not normally used, such as the underground of the road shoulder, can be effectively used. Good space efficiency.

  Further, since the filling member 20 and the concave groove member 23 are made of a synthetic resin material, they are formed in a predetermined size, so that the weight is not increased and the transportability is good. .

  And, at the construction site, it is easily stabilized in the storage space 21 of the drainage channels 15 and 16 by being connected in the vertical and horizontal directions or in the vertical direction and connected to the other filling member 20 via the connecting member 28 or the like. It can be installed easily and has good workability.

  Furthermore, in the first embodiment, the water flow rate can be easily adjusted by the height position and opening area of the upstream outlet 27e and the downstream inlets 27f, 37f of the inspection manhole portions 27, 37. Good workability.

  Furthermore, in the first embodiment, an operator enters the gravel accumulation space 27a, 37a from the inspection ports 27g, 37g of the inspection manhole portions 27, 37, and removes the hybrid such as accumulated sand or sludge. be able to. For this reason, the maintainability is even better.

  Moreover, in the first embodiment, the concave groove portion 24 can be formed with good space efficiency between the lowermost connecting members 28 and 28 on the bottom surface portion of the drainage channel 14 only by connecting the concave groove members 23. Can be installed.

  For this reason, it is not necessary to further dig up the bottom face part of the drainage channel 14, and the increase in the whole digging height can be suppressed.

  10 and 11 show a rainwater outflow suppression drainage channel structure according to Embodiment 2 of the present invention.

  The same or equivalent parts as in the first embodiment will be described with the same reference numerals.

  In the rainwater outflow suppression drainage channel structure according to the second embodiment, the drainage channel bottom surface part 34a located below the filling member 20 is formed in a concave shape below the storage space 21 of the drainage channel 34. 34c is provided, and concrete U-shaped groove members 34b are continuously provided along the flow direction.

  Next, the effect of the rainwater outflow suppression drainage channel structure of the second embodiment will be described.

  In the rainwater outflow suppression drainage channel structure of the second embodiment, in addition to the effects of the first embodiment, the bottom surface portion 34a of the drainage channel 34 is further provided with a concave groove 34c formed in a concave shape. U-shaped groove members 34b are continuously provided along the flow direction, and drain the rainwater flowing down into the drainage channel 34 together with gravel.

  Since the concave groove 34c constituted by the U-shaped groove members 34b... Is relatively easy to set the dimension in the height direction, the flow passage cross-sectional area can be increased. For this reason, even if a certain amount of gravel is accumulated, a desired flow rate can be given and the sedimented gravel can flow down.

  Other configurations and functions and effects are the same as those of the first embodiment, and a description thereof will be omitted.

  FIG. 12 shows a rainwater outflow suppression drainage channel structure according to Embodiment 3 of the present invention.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said Examples 1,2.

  In the rainwater outflow suppression drainage channel structure of the third embodiment, the drainage channels 114 and 115 are extended along directly below the L-shaped side groove members 11a and 11a of the side grooves 11 and 11 provided on the side of the road.

  In each of these drainage channels 114 and 115, the filling member 20 is connected in series with the rainwater flow downward direction S of the inclined surface portion 20 a being aligned with the flow direction of the drainage channels 114 and 115, and along the vertical direction. The connecting members 28, etc. are appropriately stacked and connected.

  Next, the effect of this Example 3 is demonstrated.

  In the rainwater outflow suppression drainage channel structure of the third embodiment, in addition to the functions and effects of the first and second embodiments, the drainage channels 114 and 115 are provided on the L-shaped side groove members 11a and 11a provided on the side of the road. It extends along the bottom.

  For this reason, the filling member can be constructed by opening the groove in accordance with the formation of the side grooves 11 and 11, the workability is good, and the weight of the heavy load is relatively low. 20... Can have a desired strength that can withstand the mounted weight.

  Other configurations and functions and effects are the same as those in the first and second embodiments, and a description thereof will be omitted.

  In the rainwater outflow suppression drainage channel structure according to Example 4, fine particles such as small sand and dust contained in the rainwater flowing through the drainage channel (for example, particles having a size of 100 μm or less and a specific gravity of 1 or less). A purifying device 35 is provided for removing water from rainwater.

  FIG. 14 shows an example in which the purification device 35 according to the present invention is provided in the drainage channel 14 described in the first embodiment. In the end portion 14 a of the drainage channel 14, in the example shown in FIG. 14, a manhole M connected to the groove member 23 is provided on the downstream side. Rainwater that has flowed through the drainage channel 14 flows into the manhole M, and further, sand, sludge, and the like in the concave groove member 23 flow in and are stored. In the upper part of the manhole M, an outlet 51 is formed that opens to the downstream side of the manhole M (on the right side in FIG. 14). Rainwater flowing into the manhole M flows out of the manhole M through the outlet 51.

  As shown in FIG. 15, the purification device 35 includes a first tank 36 that receives rainwater from the drainage channel 14, and a second tank that communicates with the first tank and receives rainwater from the first tank. 37 and is arranged downstream of the manhole M.

  In the illustrated example, the first tank 36 has a substantially rectangular parallelepiped shape as a whole. Of the pair of side walls facing each other in the flow path direction of the first tank 36, the upper portion of one side wall 36a located on the upstream side is connected to the outlet 51 of the manhole M, and rainwater is put into the first tank 36. An inflow port 38 for inflow is formed. In addition, an outlet 39 is formed in the other side wall 36b located on the downstream side of the first tank 36 for allowing rainwater flowing into the first tank 36 to flow into the second tank 37. .

  A first inlet 40 for injecting magnetic particles into the first tank 36 is formed in the top wall 36 c of the first tank 36. For example, iron sand can be used as the magnetic particles.

  The top wall 36c has a second inlet 41 for injecting a flocculant into the first tank 36 for binding magnetic particles to fine particles contained in rainwater in the first tank 36. Is formed. Examples of the flocculants include inorganic flocculants such as bangsulphate, aluminum chloride and ferric chloride, organic flocculants such as polyamines and melamine colloids, or potassium hydroxide which is an alkaline solution for pH adjustment. Sodium hydroxide or the like can be used.

  Further, the top wall 36c is stirred for stirring the rainwater so that the magnetic particles and the condensed material injected into the first tank 36 from the first and second inlets 40 and 41 are mixed with the rainwater. A propeller 42 is provided.

  When rainwater flows into the first tank 36 from the drainage channel 14 through the inlet 38, the magnetic particles and the flocculant injected from the first and second inlets 40 and 41 are respectively supplied to the stirring propeller 42. When mixed, it is mixed with rain water. Thereby, the fine particles contained in the rainwater are combined with the magnetic particles by the flocculant. The combined particles 43 formed by the combination of the fine particles and the magnetic particles flow out of the first tank 36 through the outlet 39 together with the rainwater.

  In the illustrated example, the second tank 37 has substantially the same shape as the first tank 36, and is disposed in the vicinity of the first tank 36.

  An upstream side of the second tank 37, that is, a side wall 37 a on the first tank 36 side is connected to an outlet 39 of the first tank 36, and rainwater is passed from the inside of the first tank 36 into the second tank 37. An inflow port 44 for inflow is formed.

  In the second tank 37, an accumulation member is provided for accumulating the binding particles 43 that have flowed into the second tank 37 together with rainwater. In the illustrated example, the accumulation member is constituted by a cylindrical roller 45 made of a strong permanent magnet.

  The roller 45 is disposed in the upper part of the second tank 37 in the vicinity of the side wall 37b positioned on the downstream side. In the illustrated example, both ends of the rotation shaft P are a pair of unillustrated second tanks 37. The second tank 37 is rotatably provided by being rotatably supported by the side walls. The roller 45 rotates in the upward direction when viewed from the downstream side (clockwise direction when viewed in FIG. 14). The roller 45 causes a magnetic force to act on the magnetic particles of the coupled particles 43 that have flowed into the second tank 37 along with the rainwater through the inlet 44.

  In the second tank 37, a partition member 46 for partitioning a region including the inlet 44 and the roller 45 in the tank is provided. In the illustrated example, the partition member 46 is made of a material that allows permeation of water and prevents passage of the binding particles 43, and has a plate shape extending from the lower side of the inlet 44 toward the lower side of the roller 45.

  When the binding particles 43 contained in the rainwater flow into the second tank 37 through the inflow port 44 together with the rainwater, as described above, the partition member 46 allows the water to pass therethrough and prevents the binding particles 43 from passing therethrough. Therefore, it is received by the partition member without sinking below the partition member 46. When the binding particles 43 flow into the second tank 37, the binding particles 43 are attracted to the rollers 45 by the magnetic force acting on the magnetic particles from the rollers 45. At this time, as described above, since the partition member 46 extends from below the inlet 44 toward the roller 45, the binding particles 43 are guided by the partition member 46 toward the roller 45 along the partition member. The Thereby, the collection efficiency of the binding particles 43 on the roller 45 can be improved. By binding particles 43 to the outer peripheral surface 45 a of the roller 45 by the magnetic force of the roller 45, the binding particles 43 contained in the rainwater are accumulated on the roller 45.

  On the downstream side wall 37b of the second tank 37, an outlet 47 is formed in a region below the region for allowing rainwater in the second tank 37 to flow out of the tank. As a result, rainwater that does not contain the binding particles 43 can be discharged from the second tank 37 toward, for example, a river and a sewage treatment facility (not shown).

  Further, a discharge port 48 for discharging the binding particles 43 sucked by the roller 45 to the outside of the second tank 37 is formed in the upper portion of the downstream side wall 37b.

  At the lower edge 48 a of the discharge port 48, there is provided a scoring member 49 for scavenging the binding particles 43 accumulated on the roller 45 from the roller 45.

  The sawtooth member 49 has a plate shape extending from the lower edge portion 48 a of the discharge port 48 toward the upper portion of the roller 45, and is in contact with the outer peripheral surface 45 a of the roller 45 at the tip 49 a. As a result, the tip 49 a of the sawing member 49 rubs against the outer peripheral surface 45 a of the roller 45 when the roller 45 rotates. A plate for guiding the binding particles 43 extending from the proximal end to the outside of the second tank 37 and scraped by the sawing member 49 to a reservoir (not shown) is provided at the proximal end 49b of the sawing member 49. A guide 50 is formed.

  The binding particles 43 adsorbed on the outer peripheral surface 45 a of the roller 45 move toward the sawing member 49 by the rotation of the roller 45 and abut against the tip 49 a of the sawing member 49. At this time, as described above, since the tip 49a of the sawing member 49 is rubbed against the outer peripheral surface 45a of the roller 45, the binding particle 43 is directed toward the direction opposite to the rotation direction of the roller 45. The scouring force acts from the outer peripheral surface 45a of the roller 45. The binding particles 43 are peeled off from the outer peripheral surface 45a of the roller 45 by this sawing force. The binding particles 43 scraped off by the scoring member 49 are guided to the reservoir portion by the guiding action of the guide portion 50 and stored in the reservoir portion.

  According to the present embodiment, as described above, the purifying device 35 is provided in the drainage channel 14 for removing fine particles such as small sand contained in the rainwater flowing in the drainage channel from the rainwater.

  Since the fine particles contained in the rainwater flowing in the drainage channel 14 are less likely to settle than the relatively large sand and dust, and are likely to float in the rainwater, most of them are caused by the inclined plate portion 20a of the filling member 20. Without being guided, and therefore not collected in one place, it is taken to rainwater and flows into, for example, a river or a sewage treatment facility.

  On the other hand, according to the present invention, since the purification device 35 is provided in the drainage channel 14, the rainwater is collected in the process of flowing the fine particles contained in the rainwater through the drainage channel 14 by the purification action of the purification device 35. Therefore, it is possible to reliably suppress fine particles contained in rainwater from flowing into the river or sewage treatment facility together with rainwater.

  Further, as described above, since the purification device 35 is provided at the terminal end portion 14a of the drainage channel 14, most of the large sand and dust contained in the rainwater flowing in the drainage channel 14 is contained in the drainage channel 14. After being processed in step 3, the gas flows into the purifier 35. As a result, the burden on the operation of the purification device 35 can be reliably reduced as compared with the case where large amounts of sand and dust are contained in the rainwater flowing into the purification device 35, so that the durability of the purification device 35 can be improved. Improvement can be achieved reliably.

  Further, as described above, the magnetic particles and the aggregating agent for binding the magnetic particles to the fine particles are mixed into the rainwater that the purification device 35 flows from the drainage channel, and the fine particles combined with the magnetic particles are magnetically applied. It accumulates by.

  Conventionally, in order to separate the fine particles contained in the rainwater from the rainwater, the rainwater flowing through the drainage channel 14 is mixed with a foreign substance serving as a core and a polymer flocculant, and the foreign substance is bound to the fine particles by the polymer flocculant. It has been proposed to add weight to the fine particles by causing the particles to settle and to settle the fine particles by gravity. However, in order to add a weight enough to precipitate fine particles by gravity to the fine particles, a large amount of the foreign matter is required, and a large amount of polymer flocculant is required to bind the large amount of the foreign matter to the fine particles. Therefore, the cost is increased. In addition, since the fine particles combined with the foreign substances are processed after being settled in the drainage channel by gravity, it is necessary to wait for the fine particles to settle, so that the collection efficiency of the fine particles is particularly bad during heavy rain.

  On the other hand, according to the present invention, the amount of magnetic particles to be bonded to the fine particles contained in the rainwater is sufficient if a substance having magnetism as a whole is formed when bonded to the fine particles, and the weight of the fine particles is added. Therefore, the amount of the flocculant for binding the magnetic particles is small compared to the case where a large amount of foreign matter is bound to the fine particles as in the prior art. Thereby, the increase in cost by using a large amount of foreign materials and a large amount of polymer flocculant as in the past can be reliably prevented.

  In addition, since the fine particles are forcibly collected by applying a magnetic force to the fine particles bonded to the magnetic particles, the fine particles can be collected in a shorter time than when waiting for the precipitation of the fine particles as in the prior art. Can do. Thereby, the collection efficiency of the fine particles contained in the rainwater can be reliably improved as compared with the conventional case.

  Further, the magnetic particles can be separated from the combined particles 43 collected by the roller 45, collected, and reused, thereby reducing the cost.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  That is, in the rainwater outflow suppression drainage channel structure of the first embodiment, drainage channels 14, 114, 115 having storage spaces 21 in which the filling members 20 are disposed on both sides of the road 1, One side may be sufficient.

  Further, the shape of the drainage channel 14 and the like, the shape, quantity, and material of the filling member 20 and the like are not limited, and the rainwater flow direction of the inclined surface portion 20a matches the flow direction of the drainage channel 14 and the like. Good.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a drainage channel in a state where a reinforcing member for explaining the overall configuration is removed in the rainwater outflow suppression drainage channel structure of Example 1 of the best mode of the present invention. 1 is a schematic vertical cross-sectional view of a drainage system using a rainwater outflow suppression drainage channel structure of Example 1. FIG. It is a perspective view of a drainage channel in the state where the reinforcing member explaining the composition of a termination part was removed in the rainwater outflow suppression drainage channel structure of Example 1. It is a disassembled perspective view explaining the structure of the filling member and ditch | groove member in a drainage channel by the rainwater outflow suppression drainage channel structure of Example 1. FIG. It is a perspective view explaining the structure of a filling member by the rainwater outflow suppression drainage channel structure of Example 1. FIG. It is a perspective view explaining the structure of the back surface side of a filling member by the rainwater outflow suppression drainage channel structure of Example 1. FIG. It is a partial cross section front view of the principal part seen from the downstream in the rainwater outflow suppression drainage channel structure of Example 1. FIG. It is a perspective view of the ditch | groove member used for the rainwater outflow suppression drainage channel structure of Example 1. FIG. It is sectional drawing in the position along the AA line in FIG. 8, explaining the structure of the ditch | groove member used for the rainwater outflow suppression drainage channel structure of Example 1. FIG. It is a disassembled perspective view explaining the structure of the filling member in a drainage channel, and a ditch | groove member by the rainwater outflow suppression drainage channel structure of Example 2 of embodiment of this invention. It is sectional drawing of the principal part seen from the downstream in the rainwater outflow suppression drainage channel structure of Example 2. FIG. It is a typical vertical sectional view of the drainage system using the rainwater outflow suppression drainage channel structure of Example 3. The structure of the conventional drainage channel structure is demonstrated and it is a typical longitudinal cross-sectional view of a drainage system. It is explanatory drawing which shows roughly the state by which the purification apparatus which concerns on Example 4 was provided in the drainage channel. It is a longitudinal cross-sectional view which shows the purification apparatus which concerns on Example 4 roughly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Road 2 Road shoulder 11 Side groove 14, 15, 34, 114, 115 Drainage channel 16 Rainwater 20 Filling member 21 Storage space 23 Concave groove member 24 Concave groove part 27, 37 Inspection manhole part 27a, 37a Gravel accumulation space 27e Upstream outlet 27f, 37f Downstream inlet 35 Purification device 36 First tank 37 Second tank

Claims (2)

In the drainage channel that guides and drains rainwater and the like, a permeation trough portion provided with a plurality of filling members is provided, and the rainwater flow direction of the inclined surface portion formed on the filling member is made to coincide with the flow direction of the drainage channel. Rainwater outflow suppression drainage channel structure,
The end portion of the drainage channel is fine particles contained in the rainwater flowing through the exhaust canals have been eclipsed purification device set for removal from the rainwater, the purifying apparatus, flowing from the drainage channel A first tank for mixing rain particles with magnetic particles and an aggregating agent for binding the magnetic particles to the fine particles, and the first tank connected to the first tank and flowed from the first tank. A second tank for collecting the fine particles combined with the magnetic particles of rainwater by magnetic force ,
In the second tank, a partition member for vertically partitioning the inside of the second tank is provided, and the partition member allows permeation of water and prevents passage of binding particles, and the partition member An outflow port for flowing rainwater that has permeated through the partition member to the outside is provided in the lower region of the partition member, and an inflow port of rainwater from the first tank is provided in the upper region of the partition member, An accumulating member composed of a cylindrical roller made of a strong permanent magnet for accumulating the binding particles that flowed into the tank together with rainwater, and a scoring member for scraping the binding particles accumulated on the roller, A drainage structure for suppressing rainwater outflow, characterized in that it is provided with a discharge port for discharging the binding particles scraped by the sawing member to the outside . The drainage channel is buried in the ground along a gutter,
The rainwater outflow suppression drainage channel structure according to claim 1 , wherein a manhole into which rainwater flowing through the drainage channel flows is provided at a terminal portion of the drainage channel, and the purification device is connected to the manhole .

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