Rainwater treatment system for intensively purifying and filtering roof runoff

Abstract

The utility model provides a rainwater treatment system for intensively purifying and filtering roof runoff. The rainwater treatment system comprises a filtering ditch, a negative pressure suction pipe and a water outlet well, the filtering ditch is arranged on the ground outside a building, and a water-permeable blind pipe and a filtering medium are arranged in the filtering ditch; the bottom of the negative-pressure suction pipe is communicated with the permeable blind pipe in the filtering ditch, the upper part of the negative-pressure suction pipe is communicated with the rainwater vertical pipe, and a flushing valve is arranged on the negative-pressure suction pipe; the water outlet well is communicated with the permeable blind pipe in the filtering ditch and comprises a rainwater port and a sewage port, a first flashboard and a second flashboard are arranged in the water outlet well, and sewage and clear water are separated through asynchronous opening of the first flashboard and the second flashboard. According to the utility model, the filtering load of the filtering ditch can be enhanced, the permeable blind pipe in the filtering ditch can be washed, and the separation of sewage after washing and rainwater after treatment can be realized; in addition, the filtering effect of the filtering groove can be optimized, and the rainwater purification effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sponge cities, in particular to a rainwater treatment system for enhanced purification and filtration of roof runoff. Background Art

[0002] Sponge city is a new generation of urban stormwater management concept, which means that the city can adapt to environmental changes and deal with natural disasters caused by rainwater like a sponge, and has good elasticity. It can also be called a "water-elastic city". The low-impact development design concept of source control is an important part of the sponge city. It adopts the six-character principle of "infiltration, stagnation, storage, purification, use, and discharge" to achieve the control of multiple objectives such as source water ecology, water environment, and water safety. The source control concept should give priority to meeting the main functions of the project, and then integrate the concept of rainwater control into the project according to local conditions.

[0003] The main ways to control roof runoff include in-situ green roofs and sponge facilities that use rainwater gutters to direct roof runoff into the green space around the building. Source control facilities have their own applicable conditions. For example, bioretention facilities and grass-planted ditches require a certain green area on the site and the vertical direction should be suitable. Green roofs should not be laid out on roofs with special functions or large slopes. In addition, traditional drainage facilities and source control facilities generally have independent functions and layouts. When encountering heavy rainfall, traditional drainage facilities and source control facilities are difficult to meet the requirements of rainwater treatment and discharge at the same time. Therefore, how to strengthen the rainwater treatment capacity and effect of sponge facilities will be crucial. Utility Model Content

[0004] The utility model provides a solution to the technical problem that traditional drainage facilities and source control facilities are difficult to meet the requirements for rainwater treatment and discharge when encountering heavy rainfall.

[0005] The utility model provides a rainwater treatment system for enhanced purification and filtration of roof runoff, comprising:

[0006] Filter ditch: The filter ditch is set on the ground outside the building, and a permeable blind pipe and filter medium are arranged inside the filter ditch;

[0007] Negative pressure suction pipe; the bottom of the negative pressure suction pipe is connected to the permeable blind pipe inside the filter ditch, the upper part of the negative pressure suction pipe is connected to the rainwater riser, and a flushing valve is provided on the negative pressure suction pipe; and,

[0008] The water outlet well is connected with the permeable blind pipe inside the filter ditch. The water outlet well includes a rainwater outlet and a sewage outlet. A first gate plate and a second gate plate are arranged inside the water outlet well. The separation of sewage and clean water is achieved by asynchronously opening the first gate plate and the second gate plate.

[0009] Preferably, the filter medium includes medium-coarse sand, gravel and geotextile.

[0010] Preferably, the portion where the upper portion of the negative pressure suction pipe communicates with the rainwater riser is located near the cleaning port of the rainwater riser.

[0011] Preferably, the negative pressure suction tube is made of stainless steel with high sealing performance.

[0012] Preferably, the upper portion of the negative pressure suction pipe is configured as a U-shaped structure.

[0013] Preferably, the first gate plate and the second gate plate are made of stainless steel.

[0014] Preferably, the outside of the filter ditch is a concrete structure.

[0015] Preferably, the filter ditch parameters include size, slope, stormwater flow and roughness coefficient.

[0016] In view of the deficiencies in the prior art, the beneficial effects that can be achieved by the utility model are as follows:

[0017] The utility model can strengthen the filtering load of the filter ditch by means of the negative pressure suction pipe, and can also flush the permeable blind pipe inside the filter ditch through the flushing valve arranged on the negative pressure suction pipe, thereby meeting the requirements for purifying and filtering the roof runoff during heavy rainfall, and solving the problems of low filtering capacity and clogging of the filtering medium; in addition, by dividing the water outlet well into two and connecting the rainwater outlet and the sewage outlet respectively, and then cooperating with the asynchronous opening of the two gate plates, the separation of the sewage after flushing and the rainwater after treatment can be achieved.

[0018] Furthermore, the utility model can optimize the filtering effect of the filter ditch and improve the purification effect of rainwater by providing a variety of filtering media. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0020] Figure 1 It is a connection diagram of a rainwater treatment system for enhanced purification and filtration of roof runoff;

[0021] Figure 2 It is a schematic diagram of the application of a rainwater treatment system for enhanced purification and filtration of roof runoff;

[0022] Figure 3 yes Figure 2 A schematic cross-sectional view of one of the viewing angles at point A;

[0023] Figure 4 yes Figure 2 A schematic cross-sectional view of another perspective at point A;

[0024] In the accompanying drawings, the same reference numerals are used to denote the same components or structures, wherein:

[0025] 1- filtration ditch; 2- permeable blind pipe; 3- filtration medium; 4- negative pressure suction pipe; 5- rainwater riser; 6- flushing valve; 7- outlet well; 8- rainwater inlet; 9- sewage outlet; 10- cleaning outlet; 11- first gate plate; 12- second gate plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0028] In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] This embodiment provides a rainwater treatment system for enhanced purification and filtration of roof runoff, such as Figure 1-Figure 2As shown, it includes: a filter ditch 1, a negative pressure suction pipe 4 and a water outlet well 7. The filter ditch 1 is arranged on the ground outside the building. Its main function is to intercept, purify and transport the roof runoff. The outside of the filter ditch 1 is a concrete structure, and its parameters are comprehensively determined as needed, including size, slope, rainwater flow and roughness coefficient, etc. A permeable blind pipe 2 and a filter medium 3 are arranged inside the filter ditch 1, wherein the permeable blind pipe 2 is arranged below the filter medium 3. In specific implementation, the filter medium 3 includes but is not limited to medium-coarse sand, gravel and geotextile. By setting up a variety of filter media 3, the filtering effect of the filter ditch 1 can be optimized and the purification of rainwater can be improved. The bottom of the negative pressure suction pipe 4 is connected with the permeable blind pipe 2 inside the filter ditch 1, and the upper part of the negative pressure suction pipe 4 is connected with the rainwater riser 5. A flushing valve 6 is provided on the negative pressure suction pipe 4. The rainwater riser 5 is arranged on the wall of the building. The rainwater riser 5 mainly plays a drainage role. The rainwater riser 5 can drain the roof runoff to the filter ditch 1. The upper part of the negative pressure suction pipe 4 and the rainwater riser 5 are connected. The part where the rainwater riser 5 can be drained to the filter ditch 1 is located near the cleaning port 10 of the rainwater riser 5. When necessary, the external water pipe can be connected with the negative pressure suction pipe 4, and then the negative pressure suction pipe 4 can be cleaned. The negative pressure suction pipe 4 is made of highly sealed stainless steel and has sealing and rust-proof properties. In this embodiment, the filtering load of the filter ditch 1 can be enhanced by setting the negative pressure suction pipe 4, which can meet the requirements of purifying and filtering the roof runoff during heavy rainfall. Furthermore, the upper part of the negative pressure suction pipe 4 is set as a U-shaped structure to prevent rainwater from flowing back into the negative pressure suction pipe 4; in specific implementation, there are two flushing valves 6. Under normal working conditions, the valve in the vertical direction is opened and the valve in the horizontal direction is closed. During cleaning, the valve in the vertical direction is closed and the valve in the horizontal direction is opened. By connecting the valve in the horizontal direction to the high-pressure water pipe, the access of cleaning water can be achieved, so as to flush the permeable blind pipe 2 inside the filter ditch 1; the water outlet 7 is connected to the permeable blind pipe 2 inside the filter ditch 1, and the water outlet 7 includes a rainwater outlet 8 and a sewage outlet 9, such as Figure 3-Figure 4 As shown, a first gate plate 11 and a second gate plate 12 are provided inside the water outlet well 7, and the first gate plate 11 and the second gate plate 12 are also made of stainless steel. The first gate plate 11 and the second gate plate 12 are opened asynchronously. Under normal working conditions, the first gate plate 11 is opened and the second gate plate 12 is closed, and the purified rainwater is finally discharged to the rainwater outlet 8. During cleaning, the first gate plate 11 is closed and the second gate plate 12 is opened, and the sewage is finally discharged to the sewage outlet 9, thereby realizing the separation of the flushed sewage and the treated rainwater.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rainwater treatment system for enhanced purification and filtration of roof runoff, characterized in that: It includes: a filter ditch; the filter ditch is arranged on the ground outside the building, and a permeable blind pipe and a filter medium are arranged inside the filter ditch; a negative pressure suction pipe; the bottom of the negative pressure suction pipe is connected with the permeable blind pipe inside the filter ditch, the upper part of the negative pressure suction pipe is connected with the rainwater riser, and a flushing valve is arranged on the negative pressure suction pipe; and, a water outlet well; the water outlet well is connected with the permeable blind pipe inside the filter ditch, the water outlet well includes a rainwater outlet and a sewage outlet, and a first gate plate and a second gate plate are arranged inside the water outlet well, and the separation of sewage and clean water is achieved by asynchronous opening of the first gate plate and the second gate plate.

2. The rainwater treatment system for enhanced purification and filtration of roof runoff according to claim 1, characterized in that: Filter media include medium-coarse sand, gravel and geotextiles.

3. The rainwater treatment system for enhanced purification and filtration of roof runoff according to claim 1, characterized in that: The connecting portion between the upper portion of the negative pressure suction pipe and the rainwater riser is located near the cleaning port of the rainwater riser.

4. The rainwater treatment system for enhanced purification and filtration of roof runoff according to claim 1, characterized in that: The negative pressure suction tube is made of highly sealed stainless steel.

5. The rainwater treatment system for enhanced purification and filtration of roof runoff according to claim 1, characterized in that: The upper part of the negative pressure suction pipe is arranged as a U-shaped structure.

6. The rainwater treatment system for enhanced purification and filtration of roof runoff according to claim 1, characterized in that: The first gate plate and the second gate plate are made of stainless steel.

7. The rainwater treatment system for enhanced purification and filtration of roof runoff according to claim 1, characterized in that: The outside of the filter ditch is a concrete structure.

8. The rainwater treatment system for enhanced purification and filtration of roof runoff according to claim 1, characterized in that: Filter ditch parameters include size, slope, stormwater flow rate and roughness factor.

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