CN216787351U

CN216787351U - Initial rainwater pollution control and backflow prevention system

Info

Publication number: CN216787351U
Application number: CN202122788038.8U
Authority: CN
Inventors: 张伟; 丁蓟羽; 张显忠
Original assignee: Shanghai Urban Construction Design Research Institute Group Co Ltd
Current assignee: Shanghai Urban Construction Design Research Institute Group Co Ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-06-21
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses an initial rainwater pollution control and backflow prevention system, which comprises a water inlet pipe, a catch basin, a sewage interception pipe, a first water outlet pipe, a desanding well, a desanding device, a second water outlet pipe and a backflow prevention device, wherein the catch basin is arranged at the upper part of the catch basin; the inlet tube with cut dirty pipe respectively with the vatch basin is linked together, the sand removal device sets up the inside of sand removal well, the one end of first outlet pipe with the vatch basin is linked together, the other end of first outlet pipe penetrates the sand removal well and with the input of sand removal device is linked together, the output of sand removal device with the one end of second outlet pipe is linked together. The utility model has good sewage interception effect, avoids river water from flowing backwards, is flexible in arrangement, can reduce river pollution caused by initial rainwater, effectively prevent the river water from entering a sewage system through a rainwater drainage port, ensure smooth outflow of a drainage port in rainy days, and finally achieve the purposes of protecting urban water environment and avoiding urban waterlogging.

Description

Initial rainwater pollution control and backflow prevention system

Technical Field

The utility model relates to the technical field of rain and sewage treatment, in particular to an initial rainwater pollution control and backflow prevention system.

Background

With the vigorous advance of water environment improvement engineering in China, the surface water environment quality is remarkably improved particularly under the guidance of water treatment measures taking 'source control and sewage interception' as a core. Although point source pollution is well controlled, the urban non-point source pollution problem is increasingly prominent. In order to solve the problem of the deterioration of the water environment quality of the river channel caused by town non-point source pollution, a drainage system of large diversion and small interception becomes one of the approaches for solving the problem, and is applied and popularized in the actual engineering. However, in areas with high rainfall intensity, high river network density, high river water level and flat topography, part of initial rainwater carrying a large amount of pollutants still enters the river channel through the rainwater discharge port; in addition, the flap valve and the duckbilled valve that set up at the rainwater drainage port have the problem of non return inefficacy, for example when flap valve is closed too big fragile gate seat of impact force, duckbilled valve rubber expose easy ageing for a long time, flap valve and duckbilled valve all can block because of rainwater rubbish and granule, and the non return inefficacy must lead to the river to flow backward, can reduce sewage treatment plant's concentration of intaking when serious, influences the efficiency of managing sewage.

Under the condition that the requirement on the environmental quality of surface water is continuously improved, how to further reduce the river-entering pollution degree caused by initial rainwater in a drainage system of large diversion and small interception and effectively prevent river water from entering a sewage system through a rainwater drainage outlet is one of the important problems which are urgently needed to be solved at present.

The person skilled in the art is dedicated to solving the above technical drawbacks.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, a technical object of the present invention is to solve the problems mentioned in the above-mentioned background art.

In order to achieve the technical purpose, the utility model provides an initial rainwater pollution control and backflow prevention system, which comprises a water inlet pipe, a catch basin, a sewage interception pipe, a first water outlet pipe, a sand removal well, a sand removal device, a second water outlet pipe and a backflow prevention device, wherein the catch basin is arranged in the catch basin;

the inlet tube with cut dirty pipe respectively with the vatch basin is linked together, the sand removal device sets up the inside of sand removal well, the one end of first outlet pipe with the vatch basin is linked together, the other end of first outlet pipe penetrates the sand removal well and with the input of sand removal device is linked together, the output of sand removal device with the one end of second outlet pipe is linked together, the other end of second outlet pipe is worn out the sand removal well, the inside of second outlet pipe is provided with prevents flowing backward the device.

Preferably, the desanding device is a cyclone desander.

Preferably, the sand removing well is provided with a sand sucking hole.

Preferably, the backflow prevention device is made of a high polymer material.

The utility model has the beneficial effects that:

due to the structural design, the sewage interception device has a good sewage interception effect, avoids river water from flowing backwards, is flexible in arrangement, can reduce river entering pollution caused by initial rainwater, effectively prevents the river water from entering a sewage system through a rainwater drainage port, can ensure smooth outflow of a drainage port in rainy days, and finally achieves the purposes of protecting urban water environment and avoiding urban waterlogging.

Drawings

FIG. 1 is a schematic plan view of the present invention.

Fig. 2 is a schematic cross-sectional view taken along line a-a in fig. 1.

In the figure: 1 inlet tube, 2 vatch basin, 3 sewage intercepting pipe, 4 first outlet pipes, 5 desanding wells, 6 desanding devices, 7 hole of inhaling sand, 8 second outlet pipes, 9 anti-backflow devices.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Example (b):

as shown in fig. 1-2, an initial rainwater pollution control and backflow prevention system comprises a water inlet pipe 1, a catch basin 2, a sewage interception pipe 3, a first water outlet pipe 4, a desanding well 5, a desanding device 6, a second water outlet pipe 8 and a backflow prevention device 9;

inlet tube 1 and cut dirty pipe 3 and be linked together with vatch basin 2 respectively, desanding device 6 sets up in the inside of desanding well 5, the one end and the vatch basin 2 of first outlet pipe 4 are linked together, the other end of first outlet pipe 4 penetrates desanding well 5 and is linked together with desanding device 6's input, desanding device 6's output is linked together with the one end of second outlet pipe 8, desanding well 5 is worn out to the other end of second outlet pipe 8, the inside of second outlet pipe 8 is provided with prevents flowing backward device 9, can effectively avoid the river to flow backward.

Specifically, the desanding device 6 is a cyclone desander and has a rainwater purification function.

Specifically, the sand removing well 5 is provided with a sand sucking hole 7 which can suck away the sediment deposited at the bottom of the sand removing well 5.

Specifically, the backflow prevention device 9 is made of a high polymer material and is durable in use.

The working principle and the using process of the utility model are as follows: in the early stage of rainfall, initial rainwater carrying a large amount of pollutants firstly enters the intercepting well 2 through the water inlet 1 and then is discharged to a downstream sewage system through the sewage intercepting pipe 3, at the moment, the water level in a river channel is higher than the water level in the second water outlet pipe 8, and the in-pipe backflow preventing device 9 is in a closed state to prevent river water from flowing backwards;

along with the gradual increase of rainfall intensity, the interception capacity of the interception pipe 3 reaches the maximum, excessive rainwater enters the desanding well 5 through the second water outlet pipe 8, after being decontaminated by the desanding device 6 in the desanding well 5, sediment is deposited at the bottom of the desanding well 5, purified clean rainwater is discharged into a river channel through the second water outlet pipe 8, at the moment, the in-pipe backflow prevention device 9 is in an open state, and the clean rainwater can smoothly enter the river channel; after rainfall is finished, the water level in the river channel is higher than the water level in the second water outlet pipe 8, and the in-pipe backflow prevention device 9 is in a closed state to prevent river water from flowing backwards;

sediment at the bottom of the sand removing well 5 can be sucked away through a sand sucking hole 7 by sand sucking equipment and is conveyed to a formulated place for processing.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides an initial stage rainwater pollution control and prevent flowing backward system which characterized in that: comprises a water inlet pipe (1), a catch basin (2), a sewage interception pipe (3), a first water outlet pipe (4), a desanding well (5), a desanding device (6), a second water outlet pipe (8) and an anti-backflow device (9);

the water inlet pipe (1) with cut dirty pipe (3) respectively with vatch basin (2) are linked together, desanding device (6) set up the inside of desanding well (5), the one end of first outlet pipe (4) with vatch basin (2) are linked together, the other end of first outlet pipe (4) penetrates desanding well (5) and with the input of desanding device (6) is linked together, the output of desanding device (6) with the one end of second outlet pipe (8) is linked together, the other end of second outlet pipe (8) is worn out desanding well (5), the inside of second outlet pipe (8) is provided with prevents flowing backward device (9).

2. The initial rainwater pollution control and backflow prevention system according to claim 1, wherein: the sand removing device (6) is a cyclone sand remover.

3. The initial rainwater pollution control and backflow prevention system according to claim 1, wherein: and a sand sucking hole (7) is arranged on the sand removing well (5).

4. The initial rainwater pollution control and backflow prevention system according to claim 1, wherein: the backflow prevention device (9) is made of high polymer materials.