Source reduction device for initial pollution of surface runoff

Abstract

The source reduction device comprises a drainage well and a rainwater grate, a rainwater connecting pipe is fixed to the side wall of the drainage well, a mounting groove is formed in the inner wall of the drainage well, a U-shaped mounting frame slidably connected with the inner wall of the mounting groove is arranged in the drainage well, the top of the U-shaped mounting frame is open, and a stepped groove is formed in the upper surface of the U-shaped mounting frame; a filter screen is arranged in the stepped groove, adsorption plates are arranged on the inner wall of the U-shaped mounting frame, a biological filtration membrane is arranged on the upper surface of each adsorption plate, and the filter screen intercepts impurities such as silt particles in surface runoff, so that the probability that the impurities such as the silt particles are accumulated on the adsorption plates is reduced; a worker opens the rainwater grate to lift and take out the U-shaped mounting frame from the mounting groove, so that the adsorption plate and the filter screen on the U-shaped mounting frame are cleaned, the filter screen can also be independently taken out from the stepped groove, the filter screen can be conveniently cleaned in time, and the probability that the filter screen is blocked is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and particularly relates to a source reduction device for the initial pollution of surface runoff. Background Art

[0002] In cities and industrial areas, surface runoff caused by rainfall often carries various pollutants, such as sediment, heavy metals, organic matters, etc. The pollution of surface runoff is mainly concentrated in the initial period of the generation of surface runoff. During this period, the surface runoff has the characteristics of small water flow, slow confluence speed, and high pollution concentration. If these pollutants directly enter natural water bodies without treatment, it will cause serious damage to water quality. Therefore, if the initial pollution of untreated surface runoff can be reduced and the initial pollution of surface runoff can be controlled, the pollution degree of subsequent terminal discharge water bodies can be effectively reduced.

[0003] In the Chinese utility model patent with the publication number CN213952445U, a source reduction device for the initial pollution of surface runoff is disclosed. The rain grate is divided into an adsorption grid and a drainage grid, and a communication part is arranged between the adsorption grid and the drainage grid. Among them, a low-level grate opening is arranged at the top of the adsorption grid, and a plurality of adsorption walls are arranged in the adsorption grid; a high-level grate opening is arranged at the top of the drainage grid, the height of the low-level grate opening is lower than the height of the high-level grate opening, and a rainwater connecting pipe is also connected in the drainage grid.

[0004] Regarding the above related technologies, the inventor believes that there are the following defects: there are impurities such as sediment particles in the surface runoff. Due to the large holes on the rain grate, these impurities will enter the adsorption grid through the rain grate and are easy to accumulate on the adsorption walls. It is difficult to take out the adsorption walls from the adsorption grid for cleaning, which affects the adsorption effect of the adsorption walls. Content of the Utility Model

[0005] In order to solve the above problems, the utility model provides a source reduction device for the initial pollution of surface runoff.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a source reduction device for the initial pollution of surface runoff includes a drainage well. A fixing groove is opened on the upper surface of the drainage well, and a rain grate is arranged in the fixing groove. A rainwater connecting pipe communicating with the municipal rainwater drainage system is fixed on the side wall of the drainage well. An installation groove is opened on the inner wall of the drainage well, and a U-shaped mounting frame slidably connected with the inner wall of the installation groove is arranged in the drainage well. The top of the U-shaped mounting frame is open, a stepped groove is opened on the upper surface of the U-shaped mounting frame, and a filter screen is arranged in the stepped groove. Adsorption plates are arranged on the inner wall of the U-shaped mounting frame, and a biological filtration membrane is arranged on the upper surface of each adsorption plate.

[0007] By adopting the above technical solution, surface runoff enters the drainage well through the holes on the rain grate. Larger garbage and the like are intercepted outside the drainage well by the rain grate. The filter screen intercepts impurities such as sediment particles in the surface runoff, reducing the probability of sediment particles and other impurities accumulating on the adsorption plate. Subsequently, it flows downward through multiple adsorption plates. The biological filter membrane on the adsorption plate gradually adsorbs the pollutants in the water and discharges them into the municipal rainwater drainage system through the rain connecting pipe. When cleaning is required, the staff opens the rain grate and lifts the U-shaped mounting frame upward and removes it from the mounting groove, so as to clean the adsorption plate and the filter screen on the U-shaped mounting frame. The filter screen can also be separately removed from the stepped groove, which is convenient for timely cleaning of the filter screen and reduces the probability of the filter screen being blocked.

[0008] Further, a plug-in slot is provided at the intersection between the inner wall and the side wall of the U-shaped mounting frame. A plug-in block that is in plug-in fit with the plug-in slot is fixed on the side wall of the adsorption plate. The cross-section of the plug-in block and the cross-section of the plug-in slot are both in the shape of a dovetail.

[0009] By adopting the above technical solution, the plug-in block is in plug-in fit with the plug-in slot, making the adsorption plate and the U-shaped mounting frame detachably connected. It is convenient to remove the adsorption plate for cleaning after taking out the U-shaped mounting frame. The dovetail-shaped plug-in block and plug-in slot prevent the plug-in block from falling off into the drainage well, improving the plugging stability between the plug-in block and the plug-in slot.

[0010] Further, adsorption plates are arranged on the inner walls on both sides of the U-shaped mounting frame. A plurality of adsorption plates are arranged in a staggered manner, and the adsorption plates on both sides are inclined downward toward the side close to each other.

[0011] By adopting the above technical solution, since a plurality of adsorption plates are arranged in a staggered manner, the surface runoff flows along the surfaces of the plurality of adsorption plates, prolonging the contact time between the surface runoff and the biological filter membrane on the adsorption plate and improving the effect of reducing pollutants in the surface runoff.

[0012] Further, a lower filter screen is fixed at a position on the inner wall of the drainage well close to the rain connecting pipe.

[0013] By adopting the above technical solution, the lower filter screen plays a role in filtering and protecting the rain connecting pipe, reducing the probability of the connecting pipe being blocked by impurities and improving the drainage efficiency.

[0014] Further, the lower filter screen is spherical, and the diameter of the sphere is larger than the inner diameter of the rain connecting pipe.

[0015] By adopting the above technical solution, the spherical lower filter screen expands the filtering range of the lower filter screen, reducing the probability of the mesh holes on the lower filter screen being blocked due to the accumulation of impurities around the lower filter screen, which is beneficial to the water in the drainage well to be discharged from the rain connecting pipe.

[0016] Furthermore, the inner bottom wall of the drainage well is inclined downward towards the side of the rainwater connecting pipe.

[0017] By adopting the above technical solution, the inclined inner bottom wall of the drainage well enables the surface runoff to flow towards the side of the rainwater connecting pipe under the action of gravity, which is beneficial to the rapid discharge of the surface runoff.

[0018] Furthermore, a chute is provided on the upper surface of the U-shaped mounting bracket. A handle is slidably connected to the inner wall of the chute. A limiting groove is provided on the inner wall of the chute. A limiting block fixedly connected to the side wall of the handle is slidably connected to the limiting groove. An enlarged opening groove is provided at the intersection between the inner wall of the chute and the upper surface of the U-shaped mounting bracket.

[0019] By adopting the above technical solution, when it is necessary to take out the U-shaped mounting bracket, the staff holds the handle through the enlarged opening groove, thereby pulling the handle upward and lifting the U-shaped mounting bracket, which is convenient for taking out the U-shaped mounting bracket for cleaning. The limiting block plays a limiting role on the handle, avoiding the situation that the handle disengages from the chute.

[0020] To sum up, the utility model has the following beneficial effects:

[0021] 1. In this application, the surface runoff enters the drainage well through the holes on the rainwater grate. Larger garbage and the like are intercepted outside the drainage well by the rainwater grate. The filter screen intercepts impurities such as sediment particles in the surface runoff, reducing the probability of sediment particles and other impurities accumulating on the adsorption plate. Then it flows downward through multiple adsorption plates. The biological filter membrane on the adsorption plate gradually adsorbs the pollutants in the water and is discharged into the municipal rainwater drainage system through the rainwater connecting pipe. When cleaning is required, the staff opens the rainwater grate and lifts the U-shaped mounting bracket upward from the mounting groove and takes it out, so as to clean the adsorption plate and the filter screen on the U-shaped mounting bracket. The filter screen can also be taken out separately from the stepped groove, which is convenient for cleaning the filter screen in time and reducing the probability of the filter screen being blocked;

[0022] 2. In this application, the insertion block is inserted and matched with the insertion groove, so that the adsorption plate and the U-shaped mounting bracket are detachably connected, which is convenient for detaching the adsorption plate for cleaning after taking out the U-shaped mounting bracket. The dovetail-shaped insertion block and the insertion groove prevent the insertion block from falling off into the drainage well, improving the stability of the insertion between the insertion block and the insertion groove;

[0023] 3. In this application, since multiple adsorption plates are staggered, the surface runoff flows along the surfaces of multiple adsorption plates, prolonging the contact time between the surface runoff and the biological filter membrane on the adsorption plate and improving the effect of reducing pollutants in the surface runoff. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0025] Figure 2 is a schematic cross-sectional structure diagram of an embodiment of the present utility model;

[0026] Figure 3 is a schematic structural diagram of the U-shaped mounting bracket in the embodiment of the present utility model;

[0027] Figure 4 is a schematic cross-sectional structure diagram for highlighting the limiting block in the embodiment of the present utility model.

[0028] In the figure: 1, drainage well; 11, fixing groove; 12, mounting groove; 2, rainwater grate; 3, rainwater connecting pipe; 4, U-shaped mounting bracket; 41, stepped groove; 42, insertion slot; 43, sliding groove; 44, limiting slot; 45, flared groove; 5, filter screen; 6, adsorption plate; 7, biological filtration membrane; 8, insertion block; 9, lower filter screen; 10, handle; 101, limiting block. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] As Figures 1-4 shown, an embodiment of the present application discloses a source reduction device for the initial pollution of surface runoff, including a drainage well 1, a rainwater grate 2, a rainwater connecting pipe 3, a U-shaped mounting bracket 4, a filter screen 5, an adsorption plate 6, a biological filtration membrane 7, and an insertion block 8.

[0031] The upper surface of the drainage well 1 is provided with a fixing groove 11, and the inner wall of the drainage well 1 is provided with an installation groove 12. The rainwater grate 2 is a commonly used rainwater grate 2 in the prior art and applicable to this embodiment. The rainwater grate 2 is arranged in the fixing groove 11. The rainwater connecting pipe 3 is fixed at a position near the bottom of the side wall of the drainage well 1, and the rainwater connecting pipe 3 is communicated with the municipal rainwater drainage system. The U-shaped mounting frame 4 has a U-shaped cross-section. The U-shaped mounting frame 4 is arranged in the drainage well 1. The U-shaped mounting frame 4 is slidably connected to the inner wall of the installation groove 12. The top of the U-shaped mounting frame 4 is open. The upper surface of the U-shaped mounting frame 4 is provided with a stepped groove 41. The intersection between the inner wall of the U-shaped mounting frame 4 and the side wall of the U-shaped mounting frame 4 is provided with a plug-in groove 42, and the cross-section of the plug-in groove 42 is in a dovetail shape. The filter net 5 has a mesh structure, and the filter net 5 is arranged in the stepped groove 41. The adsorption plates 6 are arranged on the inner walls on both sides of the U-shaped mounting frame 4. A plurality of adsorption plates 6 are arranged in a staggered manner. The adsorption plates 6 on both sides are inclined downward toward the side close to each other. The biological filtration membrane 7 is a commonly used biological filtration membrane 7 in the prior art and applicable to this embodiment. The biological filtration membrane 7 is arranged on the upper surface of the adsorption plate 6. The plug-in block 8 has a dovetail-shaped cross-section. The plug-in block 8 is fixed on the side wall of the adsorption plate 6, and the plug-in block 8 is in plug-in fit with the plug-in groove 42.

[0032] Surface runoff enters the drainage well 1 through the holes in the rainwater grate 2. Larger garbage and the like are intercepted outside the drainage well 1 by the rainwater grate 2. The filter net 5 intercepts impurities such as sediment particles in the surface runoff, reducing the probability of sediment particles and other impurities accumulating on the adsorption plate 6. Then it flows downward through a plurality of adsorption plates 6. Since a plurality of adsorption plates 6 are arranged in a staggered manner, the surface runoff flows along the surfaces of the plurality of adsorption plates 6, extending the contact time between the surface runoff and the biological filtration membrane 7 on the adsorption plate 6, improving the effect of reducing pollutants in the surface runoff. Finally, it is discharged into the municipal rainwater drainage system. Since the plug-in block 8 is in plug-in fit with the plug-in groove 42, the adsorption plate 6 and the U-shaped mounting frame 4 are detachably connected. When cleaning is required, the staff opens the rainwater grate 2 and lifts the U-shaped mounting frame 4 upward and takes it out from the installation groove 12, so as to disassemble the adsorption plate 6 and the filter net 5 on the U-shaped mounting frame 4 for cleaning. The filter net 5 can also be taken out from the stepped groove 41 alone, which is convenient for cleaning the filter net 5 in time and reducing the probability of the filter net 5 being blocked. The dovetail-shaped plug-in block 8 and the plug-in groove 42 prevent the plug-in block 8 from falling off into the drainage well 1, improving the plugging stability between the plug-in block 8 and the plug-in groove 42.

[0033] In order to reduce the probability of impurities blocking the rainwater connecting pipe 3, a lower filter net 9 is fixed at a position on the inner wall of the drainage well 1 close to the rainwater connecting pipe 3. The lower filter net 9 plays a role in filtering and protecting the rainwater connecting pipe 3, thereby reducing the probability of impurities blocking the rainwater connecting pipe 3 and improving the drainage efficiency.

[0034] In order to reduce the probability of clogging of the mesh holes on the lower filter screen 9, the lower filter screen 9 is spherical, and the diameter of the sphere is greater than the inner diameter of the rainwater connecting pipe 3. The spherical lower filter screen 9 expands the filtering range of the lower filter screen 9, thereby reducing the probability of clogging of the mesh holes on the lower filter screen 9 caused by the accumulation of impurities around the lower filter screen 9, which is beneficial to the drainage of the water in the drainage well 1 through the rainwater connecting pipe 3.

[0035] In order to facilitate the rapid discharge of surface runoff, the inner bottom wall of the drainage well 1 is inclined downward toward the side of the rainwater connecting pipe 3. The inclined inner bottom wall of the drainage well 1 enables the surface runoff to flow toward the side of the rainwater connecting pipe 3 under the action of gravity, thereby facilitating the rapid discharge of surface runoff.

[0036] In order to facilitate the removal of the U-shaped mounting bracket 4 for cleaning, a chute 43 is provided on the upper surface of the U-shaped mounting bracket 4. A handle 10 is slidably connected to the inner wall of the chute 43. A limiting groove 44 is provided on the inner wall of the chute 43. A limiting block 101 slidably connected to the limiting groove 44 is fixed to the side wall of the handle 10. An enlarged opening groove 45 is provided at the intersection between the inner wall of the chute 43 and the upper surface of the U-shaped mounting bracket 4. When it is necessary to remove the U-shaped mounting bracket 4, the staff holds the handle 10 through the enlarged opening groove 45, thereby pulling the handle 10 upward and lifting the U-shaped mounting bracket 4, so as to facilitate the removal of the U-shaped mounting bracket 4 for cleaning. The limiting block 101 plays a limiting role on the handle 10, avoiding the situation that the handle 10 disengages from the chute 43.

[0037] The working principle of a source reduction device for the initial pollution of surface runoff in this embodiment is as follows: The surface runoff enters the drainage well 1 through the holes on the rainwater grate 2. Larger garbage and the like are intercepted outside the drainage well 1 by the rainwater grate 2. The filter screen 5 intercepts impurities such as sediment particles in the surface runoff, reducing the probability of accumulation of sediment particles and other impurities on the adsorption plate 6. Then it flows downward through multiple adsorption plates 6. Since the multiple adsorption plates 6 are arranged in a staggered manner, the surface runoff flows along the surfaces of the multiple adsorption plates 6, extending the contact time between the surface runoff and the biological filtration membrane 7 on the adsorption plates 6, improving the effect of reducing pollutants in the surface runoff. Finally, it is discharged into the municipal rainwater drainage system. Since the plug-in block 8 is in plug-in fit with the plug-in groove 42, the adsorption plate 6 and the U-shaped mounting bracket 4 are detachably connected. When cleaning is required, the staff opens the rainwater grate 2 and lifts the U-shaped mounting bracket 4 upward from the mounting groove 12 and takes it out, so as to disassemble the adsorption plate 6 and the filter screen 5 on the U-shaped mounting bracket 4 for cleaning. The filter screen 5 can also be taken out from the stepped groove 41 alone, facilitating the timely cleaning of the filter screen 5 and reducing the probability of clogging of the filter screen 5. The dovetail-shaped plug-in block 8 and the plug-in groove 42 prevent the plug-in block 8 from falling off into the drainage well 1, improving the plug-in stability between the plug-in block 8 and the plug-in groove 42.

[0038] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. A source reduction device for initial pollution of surface runoff, comprising a drainage well (1), characterized in that: The drainage well (1) has a fixed groove (11) on its upper surface, a rainwater grate (2) is arranged in the fixed groove (11), a rainwater connecting pipe (3) connected to a municipal rainwater drainage system is fixed to the side wall of the drainage well (1), a mounting groove (12) is arranged on the inner wall of the drainage well (1), a U-shaped mounting frame (4) is arranged in the drainage well (1) and is slidably connected to the inner wall of the mounting groove (12), the top of the U-shaped mounting frame (4) is open, a stepped groove (41) is arranged on the upper surface of the U-shaped mounting frame (4), a filter screen (5) is arranged in the stepped groove (41), an adsorption plate (6) is arranged on the inner wall of the U-shaped mounting frame (4), and a biological filtration membrane (7) is arranged on the upper surface of each of the adsorption plates (6).

2. The source reduction device for initial pollution of surface runoff according to claim 1 is characterized by: A plug-in slot (42) is provided at the intersection between the inner wall of the U-shaped mounting frame (4) and the side wall of the U-shaped mounting frame (4); a plug-in block (8) pluggably matched with the plug-in slot (42) is fixed to the side wall of the adsorption plate (6); and the cross-section of the plug-in block (8) and the cross-section of the plug-in slot (42) are both dovetail-shaped.

3. The source reduction device for initial pollution of surface runoff according to claim 2 is characterized by: The inner walls of both sides of the U-shaped mounting frame (4) are provided with adsorption plates (6), a plurality of the adsorption plates (6) are arranged in a staggered manner, and the adsorption plates (6) on both sides are arranged to be inclined downward toward the side close to each other.

4. The source reduction device for initial pollution of surface runoff according to claim 3 is characterized by: A lower filter screen (9) is fixed on the inner wall of the drainage well (1) near the rainwater connecting pipe (3).

5. The source reduction device for initial pollution of surface runoff according to claim 4 is characterized by: The lower filter screen (9) is spherical, and the diameter of the sphere is larger than the inner diameter of the rainwater connecting pipe (3).

6. The source reduction device for initial pollution of surface runoff according to claim 5 is characterized by: The inner bottom wall of the drainage well (1) is arranged to be inclined downward toward one side of the rainwater connecting pipe (3).

7. The source reduction device for initial pollution of surface runoff according to claim 6 is characterized by: The upper surface of the U-shaped mounting frame (4) is provided with a slide groove (43), the inner wall of the slide groove (43) is slidably connected to a handle (10), the inner wall of the slide groove (43) is provided with a limit groove (44), the side wall of the handle (10) is fixed with a limit block (101) slidably connected to the limit groove (44), and the intersection between the inner wall of the slide groove (43) and the upper surface of the U-shaped mounting frame (4) is provided with an expansion groove (45).

Images