CN212358519U - Overflow catch basin suitable for initial stage rainwater runoff separation - Google Patents
Overflow catch basin suitable for initial stage rainwater runoff separation Download PDFInfo
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- CN212358519U CN212358519U CN201922188108.9U CN201922188108U CN212358519U CN 212358519 U CN212358519 U CN 212358519U CN 201922188108 U CN201922188108 U CN 201922188108U CN 212358519 U CN212358519 U CN 212358519U
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Abstract
The utility model discloses an overflow catch basin suitable for initial stage rainwater runoff separation belongs to initial stage runoff pollution control technical field. The method comprises the following steps: the rainwater intercepting ditch is arranged in a double-layer mode, the initial rainwater ditch is arranged on the upper layer, the overflow rainwater ditch is arranged on the lower layer, the longitudinal section of the overflow rainwater ditch along the width direction is arranged in an L shape, an initial rainwater groove is arranged at the tail end of the initial rainwater ditch, the initial rainwater groove is communicated with a sewage drainage pipe, an overflow rainwater groove is arranged at the tail end of the overflow rainwater ditch, and the overflow rainwater groove is communicated with the rainwater drainage pipe. The utility model provides a pair of overflow catch basin suitable for initial stage rainwater runoff separation reduces the pollutant that gets into the water environment from the source, alleviates the situation that urban water environment worsens.
Description
Technical Field
The utility model relates to an initial stage runoff pollution control technical field specifically is to relate to an overflow catch basin suitable for initial stage rainwater runoff separation.
Background
At present, the water permeability of impermeable ground surfaces such as urban squares, road surfaces and hardened pavement is poor, meanwhile, the places such as the urban squares, the road surfaces and the hardened pavement are main sources of non-point source pollutants, and a large amount of non-point source pollutants carried by rainwater runoff in the rainfall process enter urban water through a rainwater pipe channel system and are one of main reasons for deteriorating the water quality of the urban water. The method has the advantages that the traffic load of hardened pavements such as urban roads and squares is large, the people flow rate is high, the pollution sources are multiple, the generation intensity of non-point source pollution load is large, the hardened pavements can be used as key objects for urban non-point source pollution control, initial rainwater scours the roads in the early rainfall period, initial runoff formed by the initial rainwater runoff contains most of road pollutants, research results show that 20% of runoff rainwater pollution load in the early rainfall runoff accounts for 80% of rainfall in the whole rainfall, the initial rainwater runoff and later rainwater runoff are stripped and treated independently, the initial rainwater runoff is treated particularly, and the non-point source pollution amount of the hardened pavements can be greatly reduced.
Hardened pavements such as urban roads, squares and the like in China mostly adopt intercepting ditches and rainwater grates to store rainwater runoff, rainwater runoff directly enters municipal rainwater pipelines through the intercepting ditches and the rainwater grates in the rainfall process, and a large amount of non-point source pollutants are directly discharged into urban water without being treated, so that serious environmental pollution is caused. If the pollution sources in the rainwater runoff can be effectively stripped and the rainwater can be gathered into a municipal sewage pipe network for centralized treatment, on one hand, the load of pollutants discharged into the urban water environment can be greatly reduced, and the water quality of the urban water body is improved; and on the other hand, the pollutant degradation capability of the municipal sewage treatment system can be fully utilized, and the pollutant treatment cost is not additionally increased, so that the problem of urban non-point source pollution caused by rainwater runoff in the early stage of the rainfall process is effectively relieved and even solved.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the overflow catch basin suitable for initial rainwater runoff separation is provided with a double-layer basin body, an initial rainwater basin is arranged above and below the overflow rainwater basin, wherein one side of the initial rainwater basin is provided with an overflow weir, the tail end of the initial rainwater basin is provided with an initial rainwater tank, and the tail end of the overflow rainwater basin is provided with an overflow rainwater tank. The overflow catch drain can effectively replace the existing rainwater catch drain and partial rainwater grate, the initial rainwater catch drain in the overflow catch drain can catch initial rainwater containing a large amount of non-point source pollutants and finally discharge the initial rainwater to a municipal sewage pipe network through a sewage drainage pipe, and large-flow rainwater runoff overflows an overflow weir to the overflow rainwater catch drain in the middle and later periods of rainfall and finally discharges the initial rainwater to the municipal rainwater pipe network. Realize the separation of initial stage rainwater and middle and later stage rainwater on the one hand, reduce non-point source pollution emission, do not need extra power and equipment consumption simultaneously again, on the other hand can make full use of municipal sewage treatment system pollutant degradation ability again, does not additionally increase pollutant treatment cost to effectively alleviate or even solve the urban non-point source pollution problem that rainfall process initial stage rainwater runoff brought.
The specific technical scheme is as follows:
the utility model provides an overflow catch basin suitable for initial stage rainwater runoff separation, including setting up the initial stage rainwater ditch and the overflow rainwater ditch of setting in receipts water direction rear side of receiving the water direction front side, and the catch basin is the bilayer formula setting, the initial stage rainwater ditch sets up on the upper strata, the overflow rainwater ditch sets up in the lower floor, and the overflow rainwater ditch is "L" shape setting along width direction's longitudinal section, the end of initial stage rainwater ditch is provided with the initial stage rainwater groove, initial stage rainwater groove and sewage drain pipe intercommunication, the end of overflow rainwater ditch is provided with the overflow rainwater groove, overflow rainwater groove and rainwater drain pipe intercommunication.
The overflow catch basin suitable for initial rainwater runoff separation is characterized in that the upper parts of the basin bodies of the initial rainwater basin and the overflow rainwater basin are covered with the rainwater grates, and the aperture ratio of the rainwater grates is not lower than 50%; the upper parts of the initial rainwater tank and the overflow rainwater tank are covered with cover plates.
In the above-mentioned overflow gutter suitable for initial rainwater runoff separation, the sidewall of the initial rainwater gutter near the front side of the water collection direction is an initial rainwater gutter wall, the sidewall of the initial rainwater gutter near the rear side of the water collection direction is an overflow weir, one sidewall of the overflow rainwater gutter is also an initial rainwater gutter wall, the other sidewall of the overflow rainwater gutter is an overflow rainwater gutter wall, and the elevation of the overflow weir is lower than the elevations of the initial rainwater gutter wall and the overflow rainwater gutter wall.
In the overflow catch basin suitable for initial rainwater runoff separation, the overflow catch basin is characterized in that the starting ends of the sewage drain pipe and the rainwater drain pipe are respectively provided with a stainless steel separation net, the stainless steel separation net is provided with a plurality of through holes, and the aperture of each through hole is not more than 20 mm.
The overflow catch basin suitable for initial rainwater runoff separation is characterized in that the height of the bottom of the initial rainwater catch basin is higher than that of the bottom of the overflow rainwater catch basin.
The overflow intercepting drain suitable for initial rainwater runoff separation is also characterized in that the starting end depth of the initial rainwater drain is not less than 0.15m, the width is not less than 0.1m, the gradient is not less than 3 per thousand, and the starting end overflow depth of the overflow weir is not less than 0.05 m; the gradient of the overflow rain gutter is not less than 3 per thousand.
In the overflow catch basin suitable for initial rainwater runoff separation, the pipe diameter of the sewage drain pipe is determined according to the flow but is not less than DN200(200mm), and the top elevation of the sewage drain pipe is not higher than the bottom elevation of the initial rainwater ditch; the pipe diameter of the rainwater drainage pipe is determined according to the flow but is not less than DN300(300mm), and the height of the top of the rainwater drainage pipe is not higher than the height of the bottom of the overflow rainwater ditch.
The positive effects of the technical scheme are as follows:
the utility model provides an overflow catch basin suitable for initial stage runoff separation, (1) the overflow weir can realize the separation of initial stage runoff and middle and later stage runoff without extra energy and equipment consumption, simple structure, good separation effect; (2) the non-point source pollutants in the rainwater runoff can be efficiently intercepted, and the pollutants entering the water environment are reduced from the source, so that the condition of urban water environment deterioration is relieved; (3) the intercepted initial rainwater is finally gathered into a municipal sewage pipe network, pollutants are degraded through a municipal sewage treatment system, sewage treatment equipment and investment are not additionally increased, and the comprehensive cost is low.
Drawings
Fig. 1 is a plan view of an embodiment of an overflow catch basin of the present invention suitable for initial rainwater runoff separation;
fig. 2 is a schematic three-dimensional structure view of an embodiment of an overflow catch basin suitable for initial rainwater runoff separation according to the present invention;
3 FIG. 3 3 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3
3 FIG. 3 4 3 is 3 a 3 perspective 3 view 3 of 3 the 3 section 3 A 3- 3 A 3 in 3 FIG. 3 1 3; 3
FIG. 5 is a cross-sectional view taken at B-B of FIG. 1;
fig. 6 is a cross-sectional view at C-C in fig. 1.
In the drawings: 1. initial rainwater ditch; 2. overflowing the rain gutter; 3. an initial rain gutter; 4. an overflow gutter; 5. a rain grate; 6. an overflow weir; 7. initial rainwater ditch wall; 8. overflowing the gutter wall of the rain gutter; 9. a sewage drain pipe; 10. a rainwater drain pipe; 11. stainless steel separation net; 12. and (7) a cover plate.
Detailed Description
In order to make the technical means, creation characteristics, achievement purpose and efficiency of the utility model easy to understand and understand, the following embodiment combines the attached drawings 1 to 6 to be right the utility model provides an overflow catch basin suitable for initial stage rainwater runoff separation does concrete exposition.
In this embodiment, the overflow gutter includes an initial rain gutter 1 disposed at a front side of a water collection direction and an overflow rain gutter 2 disposed at a rear side of the water collection direction, the initial rain gutter 1 is used for flowing in rainwater with more pollutants at a small flow rate during rainfall, the overflow rain gutter 2 is used for flowing in rainwater with less pollutants at a large flow rate during rainfall, the gutter is disposed in a double-layer manner, the initial rain gutter 1 is disposed at an upper layer, the overflow rain gutter 2 is disposed at a lower layer, but the initial rain gutter 1 only occupies a part of an upper layer of the gutter, another part of the upper layer of the gutter is used as a part of the overflow rain gutter 2 and is communicated with the initial rain gutter 1, a longitudinal section of the overflow rain gutter 2 in a width direction is disposed in an "L" shape, an end of the initial rain gutter 1 is provided with the initial rain gutter 3, the initial rain gutter 3 is communicated with a sewage drain pipe 9, and the initial rain gutter 3 with more pollutants at an initial stage flowing into the initial rain gutter 1 collects the most in the initial rain gutter 3 Finally, the sewage is discharged into a municipal sewage pipe network through a sewage drain pipe 9, the tail end of the overflow rainwater ditch 2 is provided with an overflow rainwater tank 4, the overflow rainwater tank 4 is communicated with a rainwater drain pipe 10, and rainwater which flows into the overflow rainwater ditch 2 and has less pollutants in the middle and later periods is collected in the overflow rainwater tank 4 and finally discharged into the municipal rainwater pipe network or a town water system through the rainwater drain pipe 10.
In a preferred embodiment, as shown in fig. 1, 3 and 4, the upper parts of the gutter bodies of the initial rainwater gutter 1 and the overflow rainwater gutter 2 are covered with a rainwater grate 5, so that rainwater can fall or flow into the initial rainwater gutter 1 and the overflow rainwater gutter 2 through the rainwater grate 5, and the aperture ratio of the rainwater grate 5 is not lower than 50%; the upper portions of the initial rain gutter 3 and the overflow rain gutter 4 are covered with the cover plate 12, so that external pollutants are prevented from falling into the initial rain gutter 3 and the overflow rain gutter 4, and the later maintenance of the rain gutter and the drain pipe is facilitated.
In a preferred embodiment, as shown in fig. 1, 2, 5 and 6, the side wall of the initial rain gutter 1 near the front side of the water collection direction is an initial rain gutter wall 7, the side wall of the initial rain gutter 1 near the rear side of the water collection direction is an overflow weir 6, one side wall of the overflow rain gutter is also an initial rain gutter wall 7, the other side wall of the overflow rain gutter is an overflow rain gutter wall 8, the elevation of the overflow weir 6 is lower than the elevations of the initial rain gutter wall 7 and the overflow rain gutter wall 8, when the amount of water in the initial rain gutter 1 is too large, the excessive amount of water flows into the overflow rain gutter 2 over the overflow weir, and the initial rain gutter wall 7 and the overflow rain gutter wall 8 serve as the two outer side walls of the overflow catch gutter, and the elevations of the two are the same.
In a preferred embodiment, as shown in fig. 5 and 6, the starting ends of the sewage drain pipe 9 and the rainwater drain pipe 10 are provided with stainless steel separation nets 11, and the stainless steel separation nets are provided with a plurality of through holes, and the diameter of each through hole is not more than 20 mm. The stainless steel separation net 11 can intercept larger impurities in the rainwater, so as to prevent the blockage of the drain pipe, and the impurities accumulated in the initial rainwater tank 3 and the overflow rainwater tank 4 need to be cleaned by periodically opening the cover plate 12.
In a preferred embodiment, as shown in fig. 3, the elevation of the bottom of the initial rain gutter 1 is higher than the elevation of the bottom of the overflow rain gutter 2, the instantaneous amount of water that can pass through the initial rain gutter 1 is smaller than the instantaneous amount of water that can pass through the overflow rain gutter 2, and when the amount of rain that falls into the initial rain gutter 1 exceeds the maximum instantaneous amount of water that can pass through the initial rain gutter, the excess amount of rain flows into the overflow rain gutter 2, and the rainwater that overflows is generally less polluted.
In a preferred embodiment, as shown in fig. 1 and 2, the initial depth of the initial gutter 1 is not less than 0.15m, the width is not less than 0.1m, the gradient is not less than 3% o, and the initial overflow depth of the overflow weir 6 is not less than 0.05 m; the gradient of the overflow rain gutter 2 is not less than 3 per thousand, so that the flow speed of rain water in the initial rain gutter 1 and the overflow rain gutter 2 and the amount of rain water capable of bearing are ensured.
In a preferred embodiment, as shown in fig. 5 and 6, the pipe diameter of the sewage drain pipe 9 is determined according to the actual possible encountered rainwater flow but is not less than DN200(200mm), and the top elevation of the sewage drain pipe 9 is not higher than the bottom elevation of the initial rainwater ditch 1; the pipe diameter of the rainwater drainage pipe 10 is determined according to the actual rainwater flow possibly encountered but is not less than DN300(300mm), and the top elevation of the rainwater drainage pipe 10 is not higher than the bottom elevation of the overflow rainwater ditch 2.
In the following description, a specific embodiment is described, and it should be noted that the structures, processes and materials described in the following embodiment are only used to illustrate the feasibility of the embodiment, and are not intended to limit the scope of the present invention.
In the process of rainfall, runoff in the early stage of rainfall finishes primary washing on impervious ground surfaces such as roads, squares and the like, rainwater runoff enters an initial rainwater ditch 1 through a rainwater grate 5 along the slope direction of the roads, and is converged to an initial rainwater tank 3 according to the slope direction, and finally is discharged to a municipal sewage pipe network through a sewage drain pipe 9 at the bottom of the initial rainwater tank 3; along with the increase of rainfall duration, the runoff flow of the rainwater is increased and the concentration of non-point source pollutants in the rainwater is reduced, the water passing section of the initial rainwater ditch 1 is small, the drainage capacity is limited, the excessive runoff of the rainwater flows over the overflow weir 6 to enter the overflow rainwater ditch 2, the excessive runoff of the rainwater can cross the initial rainwater ditch 1 and directly enters the overflow rainwater ditch 2 through the rainwater grate 5 on the upper part of the overflow rainwater ditch 2, so that the diversion of the initial runoff and the medium runoff of the rainfall is realized, the initial runoff with small runoff and high pollutant load enters the initial rainwater ditch and finally enters a municipal sewage pipe network, the medium runoff with large runoff and low pollutant load enters the rainwater ditch and finally enters the municipal rainwater pipe network or is directly discharged into a town water system, the non-point source pollutant load of the medium runoff is greatly reduced, and the pollution load of the low runoff flow of the later stage of the rainfall is low, after entering the initial rainwater ditch 1, the flushing effect on the initial rainwater ditch 1 can be realized, and the blockage of the initial rainwater ditch 1 is reduced. The stainless steel wire separation net 11 can intercept impurities in rainwater, so that a drain pipe is prevented from being blocked, and impurities accumulated in the initial rainwater tank 3 and the overflow rainwater tank 4 need to be periodically lifted by the cover plate 12 for subsequent maintenance and cleaning.
The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.
Claims (7)
1. The utility model provides an overflow catch basin suitable for initial stage rainwater runoff separation, its characterized in that, is including setting up initial stage rainwater ditch (1) and the overflow rainwater ditch (2) of setting in receipts water direction rear side of receiving the water direction front side, just the catch basin is the bilayer formula setting, initial stage rainwater ditch (1) sets up on the upper strata, overflow rainwater ditch (2) set up in the lower floor, just overflow rainwater ditch (2) are "L" shape setting along width direction's longitudinal section, the end of initial stage rainwater ditch (1) is provided with initial stage rainwater groove (3), initial stage rainwater groove (3) and sewage drain pipe (9) intercommunication, the end of overflow rainwater ditch (2) is provided with overflow rainwater groove (4), overflow rainwater groove (4) and rainwater drain pipe (10) intercommunication.
2. The overflow intercepting drain suitable for initial rainwater runoff separation according to claim 1, wherein the upper part of the body of each of the initial rainwater drain (1) and the overflow rainwater drain (2) is covered with a rainwater grate (5), and the aperture ratio of the rainwater grate (5) is not lower than 50%; the upper parts of the initial rainwater tank (3) and the overflow rainwater tank (4) are covered with cover plates (12).
3. The overflow intercepting drain suitable for initial rainwater runoff separation according to claim 1, wherein the side wall of the initial rainwater drain (1) near the front side of the water collection direction is an initial rainwater drain wall (7), the side wall of the initial rainwater drain (1) near the rear side of the water collection direction is an overflow weir (6), one side wall of the overflow rainwater drain is also the initial rainwater drain wall (7), the other side wall of the overflow rainwater drain is an overflow rainwater drain wall (8), and the elevation of the overflow weir (6) is lower than the elevations of the initial rainwater drain wall (7) and the overflow rainwater drain wall (8).
4. The overflow intercepting drain suitable for initial rainwater runoff separation according to claim 1, wherein the starting ends of the sewage draining pipe (9) and the rainwater draining pipe (10) are provided with stainless steel separation nets (11), and the stainless steel separation nets are provided with a plurality of through holes, and the aperture of each through hole is not more than 20 mm.
5. An overflow gutter adapted for initial rainwater runoff separation according to claim 1 wherein the elevation of the bottom of the initial gutter (1) is higher than the elevation of the bottom of the overflow gutter (2).
6. The overflow intercepting drain suitable for initial rainwater runoff separation according to claim 3, wherein the initial depth of the initial rainwater drain (1) is not less than 0.15m, the width is not less than 0.1m, the gradient is not less than 3% o, and the initial overflow depth of the overflow weir (6) is not less than 0.05 m; the gradient of the overflow rainwater ditch (2) is not less than 3 per thousand.
7. The overflow intercepting drain suitable for initial rainwater runoff separation according to claim 1, wherein the pipe diameter of the sewage drainage pipe (9) is not less than DN200, and the top elevation of the sewage drainage pipe (9) is not higher than the bottom elevation of the initial rainwater drain (1); the pipe diameter of the rainwater drainage pipe (10) is not less than DN300, and the top elevation of the rainwater drainage pipe (10) is not higher than the bottom elevation of the overflow rainwater ditch (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922188108.9U CN212358519U (en) | 2019-12-09 | 2019-12-09 | Overflow catch basin suitable for initial stage rainwater runoff separation |
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| CN201922188108.9U CN212358519U (en) | 2019-12-09 | 2019-12-09 | Overflow catch basin suitable for initial stage rainwater runoff separation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833079A (en) * | 2021-09-18 | 2021-12-24 | 北京建筑大学 | Bidirectional bioretention facility |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833079A (en) * | 2021-09-18 | 2021-12-24 | 北京建筑大学 | Bidirectional bioretention facility |
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