Quality-based and separate-flow type rainwater inlet

Abstract

The quality and flow type rainwater inlet. The rainwater inlet well chamber is a rectangular cavity, the well chamber top is provided with a well ring and a rainwater grate, the sewage interception system is fixed on the upper part of the well chamber through a sewage interception system mounting support, the well chamber bottom plate two sides are respectively provided with a sewage interception pipe and a rainwater drainage pipe. The sewage interception system contains a sewage interception plate, a sludge tank, a timing tank, an initial rainwater collecting pipe and other components, which are fixed on the upper part of the well chamber through a sewage interception system mounting support, the support and the well chamber are tightly sealed without gaps; the support left side is short, the right side is long, a limiting block is arranged below the support right side; the support left side and the sewage interception plate are connected through a rotating shaft, the sewage interception plate can rotate around the rotating shaft, the support right side and the sewage interception plate are connected through a limiting spring; the sewage interception plate is provided with a reverse along along the well chamber long side, the sewage interception plate four sides are high, the initial rainwater collecting pipe is low; the sewage interception plate right side is provided with an initial rainwater collecting pipe, the sewage interception plate left side of the initial rainwater collecting pipe is provided with a sludge tank and a timing tank, there is a partition plate between the sludge tank and the timing tank, the partition plate upper part is provided with a flow adjustable type communication pipe, the timing tank mouth part is provided with a water retaining weir, the timing tank bottom plate is provided with a drainage hole.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of municipal drainage engineering, and is a quality and flow separation type rainwater inlet. BACKGROUND

[0002] Rainwater containing surface pollutants at the initial stage of rainfall is called initial rainwater, and this part of rainwater is highly polluted and needs to be purified. Rainwater at the middle and late stages of rainfall is called clean rainwater. Since the surface has been washed by the initial rainwater, the content of surface pollutants in the runoff rainwater is low, and this part of rainwater can be directly discharged into the water body. The content of pollutants in rainwater gradually decreases with the washing of the surface by rainwater, and there is a corresponding relationship between the concentration of pollutants in rainwater and the duration of rainfall. In the design, the initial rainwater and clean rainwater are often identified by controlling the duration of rainfall. It is generally believed that the surface runoff rainwater after 30 minutes of rainfall is clean rainwater, and the surface rainwater in the first 30 minutes is polluted rainwater, i.e. initial rainwater.

[0003] At the initial stage of rainfall, surface pollutants are discharged into the city road rainwater inlet along with the initial rainwater, and are discharged into the water body through the rainwater pipe network, which seriously pollutes the rivers and lakes around the city. The new version of "Outdoor Drainage Design Standard" (GB50014-2021) proposes that city sewage plants should reserve the initial rainfall treatment capacity, and initial rainwater (containing non-point source pollutants) should be collected at the source, transported by sewage pipes (or special pipe networks), and discharged into city sewage plants for disposal, which will become the mainstream technical route for comprehensive disposal of non-point source pollutants.

[0004] The scope of urban non-point source pollution is wide, and how to achieve rainwater pollution separation at the source to create conditions for subsequent initial rainwater to enter the city sewage plant for purification and clean rainwater at the middle and late stages to be discharged into the water body has become a technical problem that needs to be solved urgently. The rainwater inlet matched with the city road is the source of the rainwater collection system and the first portal for non-point source pollutants to enter the water body. The first generation of rainwater inlets (traditional type) is mainly used for collecting ground rainwater and does not have the function of removing runoff pollutants. With the application of the sponge city design concept to the urban rainwater drainage system, the concept of the second generation of rainwater inlets (pollution interception type) is proposed, but it is limited to intercepting pollutants in initial rainwater through grid, filter material and other materials, and does not achieve rainwater pollution separation. In recent years, a third generation of rainwater inlets (quality and flow separation type) has also appeared, which measures the pollution concentration in rainwater through rain gauges, conductivity meters and other equipment, controls the initial rainwater well and clean rainwater well water intake and discharge systems through electric control valves, and realizes rainwater pollution separation. However, the system is complex and inconvenient to manage and maintain.

[0005] Chinese patent CN210421361U discloses a "offset ditch type sewage interception type gutter", which discloses a gutter provided with a water distribution channel and a sewage interception fence and a sewage interception tank. The sewage interception tank is provided with a drainage layer and a filter layer from bottom to top. The rainwater is purified by the filter material and then discharged into the municipal rainwater pipe network. The pollution is intercepted in the filter material. The device can filter and intercept the initial rainwater pollution, but it does not separate the rainwater according to the degree of pollution. Moreover, due to the high content of sand in the initial rainwater and the large proportion of inorganic pollutants, the filter material has limited sewage interception capacity and needs to be replaced regularly, resulting in high maintenance cost.

[0006] Chinese patent CN214246020U discloses a "sewage interception type gutter with filter screen". The gutter includes a spring, a baffle and a filter screen. The initial rainwater flows into the filter screen first, and then flows into the rainwater pipe after filtration. As the amount of rainwater increases, the filter screen is filled with water, and the rainwater exceeds the filter screen and directly flows into the rainwater pipe. The filter screen can physically intercept the solid pollution of the initial rainwater and reduce the amount of non-point source pollutants entering the rainwater pipe network, but it cannot separate the rainwater according to the degree of pollution.

[0007] Chinese patent CN112064755A discloses a "precise initial rainwater separation and treatment system for rainwater inlet". The patent adds a rainwater separation device (dry season cabin and rainy season cabin), a water quality detector, an overflow system, a grid and a deslagging system to the rainwater inlet. Through the water quality detector, the linkage valve and the overflow system are opened and closed, the initial rainwater containing pollution is intercepted and discharged into the treatment device, and the initial rainwater deslagging and sedimentation treatment is realized. The device can isolate non-dissolved pollutants such as leaves and sand in the initial rainwater, but the treatment effect on dissolved pollution is not obvious, and the system is complex and inconvenient to maintain and manage.

[0008] Chinese patent CN112227501A discloses an "initial rainwater intelligent collection and separation rainwater inlet and separation method". The patent sets up an initial rainwater vertical well 1 and a clean rainwater vertical well 2, and provides facilities such as a water inlet grate for the vertical well 1 and a water inlet baffle for the vertical well 2. The two vertical wells are opened and closed by a sensor instrument to realize rainwater pollution separation. During the initial stage of rainfall, the baffle of the vertical well 2 is closed, the initial rainwater enters the initial rainwater collection well and is discharged into the sewage pipe; during the middle and later stages of rainfall, the clean rainwater enters the collection well 2 and is filtered before entering the rainwater pipe. The invention can realize rainwater separation, but the system is complex and requires electric control instruments to realize separation, which is inconvenient for subsequent pipe maintenance. SUMMARY

[0009] The present application aims to provide a separation and separation type rainwater inlet which can automatically realize initial rainwater pollution separation and collection at the source, creating a prerequisite for subsequent purification treatment in the municipal sewage plant. The rainwater inlet can also prevent the overflow of rainwater inlet sediment and corruption gas in the dry season, has good deodorization function, and is simple in device and convenient in management and maintenance.

[0010] The technical solution of the present application is:

[0011] The quality and flow type rainwater inlet includes a well chamber, a rainwater grate, a well ring, a sewage interception system, a sewage interception pipe and a rainwater drainage pipe. The rainwater inlet well chamber is a rectangular cavity. The well chamber top is provided with a well ring and a rainwater grate. The well chamber bottom plate is provided with a sewage interception pipe and a rainwater drainage pipe on both sides. The sewage interception system includes a sewage interception plate, a sediment tank, a timing tank and a initial rainwater collection pipe. The well chamber upper portion is provided with a sewage interception system mounting bracket. The sewage interception system mounting bracket is fixed on the well chamber upper portion and is tightly combined with the well chamber without gaps. The bracket left side is short and the right side is long. A limiting block is arranged below the bracket right side. The bracket left side and the sewage interception plate are connected through a rotating shaft. The sewage interception plate can rotate around the rotating shaft. The bracket right side and the sewage interception plate are connected through a limiting spring. The sewage interception plate is provided with a reverse direction along the well chamber long side. The sewage interception plate is high around the well chamber and is low at the initial rainwater collection pipe. The sewage interception plate right side is provided with an initial rainwater collection pipe. The sewage interception plate left side of the initial rainwater collection pipe is provided with a sediment tank and a timing tank. The sediment tank and the timing tank are provided with a partition plate. The partition plate upper portion is provided with a flow adjustable type connecting pipe. The timing tank opening portion is provided with a water weir. The timing tank bottom plate is provided with a drainage hole. The initial rainwater collection pipe is provided with a water storage bend.

[0012] Further, the initial rainwater collection pipe water storage bend lower portion is provided with a cleaning opening.

[0013] Further, the sewage interception plate, the initial rainwater collection pipe, the sediment tank and the timing tank are integrally formed and can be made of stainless steel or high strength plastic.

[0014] Further, the bracket right side and the sewage interception plate are connected through a limiting spring or a connecting device for realizing the separation and combination of the sewage interception plate and the right side bracket through controlling the sewage interception plate upper portion weight.

[0015] The present application has the following advantages: on the basis of the conventional rainwater inlet, the simple improvement does not need electric transmission automatic control instruments and does not need to add rainwater wells. Only the sewage interception device is added on the well chamber upper portion. The rainwater and sewage are automatically separated and flow. The initial rainwater source is collected. Then the basic conditions for sending to the city sewage plant for purification treatment are created. At the same time, in the non-rainy weather, the interception system is automatically closed. The rainwater inlet sediment odor gas overflow is avoided. The device has the deodorization function. The present application has high non-point source pollution collection rate, high automation degree, no need of electric control system, basically no increase of city rainwater pipe network system construction cost and convenient subsequent management and maintenance. The sewage interception device is integrally formed. The installation and dismounting are simple. The management is convenient. The maintenance cost is low. The sewage interception effect is remarkable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a plan view of the quality and flow type rainwater inlet.

[0017] Figure 2 It is a cross section view of the initial rainwater interception working condition.

[0018] Figure 3 It is a cross section view of the clean rainwater drainage working condition.

[0019] Figure 4 Sewer system plan view.

[0020] Figure 5 Sewer system 1-1 cross-sectional view.

[0021] Figure 6 Sewer system 2-2 cross-sectional view.

[0022] Figure 7 Sewer system installation bracket configuration view.

[0023] In the figure: 1. Well chamber, 1-1. Well wall, 2. Rainwater grate, 3. Well ring, 4. Limiting spring, 5. Sewer system, 5-1. Sewer plate, 5-1-1. Sewer plate reverse side, 5-2. Sediment tank, 5-2-1. Partition, 5-3. Timing tank, 5-3-1. Flow-adjustable connecting pipe, 5-3-2. Flow-adjustable connecting pipe water inlet hole, 5-3-3. Flow-adjustable connecting pipe cap, 5-3-4. Timing tank drain hole, 5-3-5. Timing tank water retaining weir, 5-4. Initial rainwater collection pipe, 5-4-1 Initial rainwater collection pipe water trap, 5-4-2 Initial rainwater collection pipe water trap cleaning port, 6. Sewer pipe, 7. Rainwater drain pipe, 8. Sewer system installation bracket, 8-1. Bracket left side rotating shaft, 8-2. Limiting block. DETAILED DESCRIPTION

[0024] The following is further illustrated with reference to the accompanying drawings and examples:

[0025] Figure 1 , Figure 2 , Figure 3 As shown: The split-flow type rainwater inlet includes a well chamber 1, a rainwater grate 2, a well ring 3, a limiting spring 4, a sewer system 5, a sewer pipe 6, a rainwater drain pipe 7, and a sewer system installation bracket 8. The sewer system 5 includes a sewer plate 5-1, a sediment tank 5-2, a timing tank 5-3, and an initial rainwater collection pipe 5-4. The well chamber 1 is a rectangular cavity with the same size and masonry method as a traditional rainwater inlet well chamber. The well ring 3 is installed on the top of the well chamber 1, and the rainwater grate 2 is installed on the well ring 3. The sewer system 5 is fixed around the well chamber 1 by the sewer system installation bracket 8. The sewer pipe 6 and the rainwater drain pipe 7 are arranged on both sides of the bottom plate of the well chamber 1. In the sewer working condition, the initial rainwater enters the sewer pipe 6 and is connected to the municipal sewer pipe. In the clean rainwater discharge working condition, the clean rainwater flows into the well chamber 1 and is connected to the municipal rainwater pipe through the drain pipe 7.

[0026] Figure 4 , Figure 5 , Figure 6The shown: the right side of the intercepting plate 5-1 is provided with a initial rain water collecting pipe 5-4, the initial rain water collecting pipe 5-4 is provided with a water trap 5-4-1, the bottom of the water trap is provided with a cleaning port 5-4-2; the intercepting plate 5-1 is provided with a reverse along 5-1-1 along the long side of the well chamber 1, the intercepting plate is high around and low at the initial rain water collecting pipe 5-4; the intercepting plate 5-1 is provided with a mud settling tank 5-2 and a timing tank 5-3 at the left side of the initial rain water collecting pipe 5-4, there is a partition plate 5-2-1 between the mud settling tank and the timing tank, the upper portion of the partition plate is provided with a flow-adjustable communication pipe 5-3-1; the timing tank 5-3 is provided with a water retaining weir 5-3-5 at the opening, and the bottom plate of the timing tank is provided with a drain hole 5-3-4. The flow-adjustable communication pipe 5-3-1 is composed of a flow-adjustable communication pipe water inlet hole 5-3-3 and a flow-adjustable communication pipe cap 5-3-4; the intercepting plate 5-1, the mud settling tank 5-2, the timing tank 5-3 and the initial rain water collecting pipe 5-4 are integrally formed and can be made of stainless steel or high-strength plastic material. By opening the left side pivot 8-1 and the right side spring 4 of the intercepting plate 5-1, the intercepting system 5 can be taken out of the well chamber, and the accumulated mud in the mud settling tank can be cleaned; by unscrewing the cleaning port 5-4-2, the silt in the water trap can be cleaned.

[0027] Figure 7 The shown: the intercepting system mounting bracket 8 is fixed on the upper portion of the well chamber and is tightly combined with the well chamber without gap. The bracket 8 is asymmetric on the left and right sides, the left side is short, the right side is long, and the right side of the bracket is provided with a limiting block 8-2; the left side of the bracket is connected with the intercepting plate 5-1 through a pivot 8-1, and the intercepting plate 5-1 can rotate around the pivot; the right side of the bracket is connected with the intercepting plate 5-1 through a limiting spring 4, and the limiting spring 4 can be replaced by a magnetic material or other device for controlling the weight of the upper portion of the intercepting plate 5-1 to realize the separation and combination of the intercepting plate 5-1 and the bracket 8;

[0028] The working process of the quality separation and flow separation type rainwater inlet:

[0029] (1) In the early stage of rainfall, rainwater carrying non-point source pollutants flows to the rainwater inlet through the surface runoff channel, and is distributed through the intercepting plate 5-1. Because the timing tank 5-3 is provided with a water retaining weir 5-3-5 at the opening, the rainwater on the intercepting plate is preferentially introduced into the mud settling tank 5-2, and the silt is separated from the water.

[0030] (2) Part of the rainwater in the mud settling tank overflows into the initial rain water collecting pipe 5-4, and is injected into the intercepting pipe 6 at the bottom of the rainwater inlet, and the intercepting pipe is communicated with the municipal sewage pipe network; the other part enters the timing tank 5-3 through the adjustable communication pipe 5-3-1; there is a partition plate 5-2-1 between the mud settling tank and the timing tank.

[0031] (3) The timing groove 5-3 controls the initial rain interception time and the weight of the opening limiting spring 4. The design volume of the timing groove 5-3 meets the weight of the opening limiting spring, and the flow rate of the adjustable communication pipe 5-3-1 is adjusted to control the time length of the rainwater filling the timing groove, so as to realize the automatic switching of the initial rain interception and the clean rain discharge through the rainfall time. The water inflow of the flow rate adjustable communication pipe 5-3-1 is greater than the water outflow of the timing groove bottom drain hole 5-3-4, and the flow rate difference between the two is related to the initial rain interception time.

[0032] (4) The flow rate adjustable communication pipe 5-3-1 has a flow rate adjustable communication pipe inlet hole 5-3-2 and a flow rate adjustable communication pipe cap 5-3-3 on the side of the sedimentation groove, and the number of inlet holes wrapped by the cap is adjusted to control the flow rate between the sedimentation groove and the timing groove. Adjusting the water inflow of the communication pipe 5-3-1 and the water outflow of the drain hole 5-3-4 is related to the initial rain interception time, which can minimize the face source pollutants entering the rainwater system. The pollution is light, the initial rain interception time is short, and the flow rate of the communication pipe 5-3-1 is large; the pollution is heavy, the initial rain interception time is long, and the flow rate of the communication pipe 5-3-1 is small.

[0033] (5) When the rainwater in the timing groove reaches the set value, the weight of the opening limiting spring 4 is completed, the interception plate 5-1 is separated from the limiting block 8-2, and the clean rainwater is discharged into the rainwater well chamber 1; at the same time, the interception plate rotates, the initial rainwater collecting pipe 5-4 is separated from the interception pipe 6, and the clean rainwater is prevented from entering the sewage pipe network.

[0034] (6) When the rainfall stops, the rainwater in the timing groove is discharged through the timing groove drain hole 5-3-4, and the limiting spring 4 pulls the interception plate 5-1 back to the limiting block 8-2.

[0035] (7) The initial rainwater collecting pipe 5-4 has a water trap 5-4-1, the interception plate 5-1 is attached to the limiting block 8-2 in the dry season, and the well chamber forms a closed space to prevent odor from overflowing.

[0036] (8) In the dry season, the interception system can be taken out of the well chamber by opening the interception system installation support 8 left side rotating shaft 8-1 and the limiting spring 4, and the accumulated mud in the sedimentation groove 5-2 can be cleaned; the lower cleaning port 5-4-2 of the water trap 5-4-1 can be rotated to clean the mud in the water trap.

[0037] (9) The interception system can be made of stainless steel or high-strength plastic, and is modularly assembled without electric control system, which is simple and reliable, low in cost, and convenient to maintain.

Claims

1. A quality and flow type rainwater inlet, comprising a well chamber, a rainwater grate, a well ring, a rainwater drainage pipe, the rainwater inlet well chamber is a rectangular cavity, the well chamber is provided with a well ring and a rainwater grate, characterized in that: There is a sewage interception system, including sewage interception plate, sediment tank, timing tank, initial rainwater collecting pipe, the sewage interception system is connected with the upper part of the well chamber through the installation support, the upper part of the well chamber is provided with the installation support, the installation support is fixed on the upper part of the well chamber and is tightly sealed without gap; The left side of the installation support is short, and the right side is long, a limiting block is arranged below the right side of the installation support; The left side of the installation support is connected with the sewage interception plate through a rotating shaft, the sewage interception plate can rotate around the rotating shaft, the right side of the installation support is connected with the sewage interception plate through a limiting spring; The sewage interception plate is provided with a reverse along along the long side of the well chamber, the sewage interception plate is high around, and the initial rainwater collecting pipe is low; The right side of the sewage interception plate is provided with the initial rainwater collecting pipe, the left side of the sewage interception plate is provided with the sediment tank and the timing tank, there is a partition plate between the sediment tank and the timing tank, a flow-adjustable connecting pipe is arranged on the upper part of the partition plate, a water retaining weir is arranged at the opening of the timing tank, and a drain hole is arranged on the bottom plate of the timing tank; The initial rainwater collecting pipe is provided with a water storage bend; The both sides of the bottom plate of the well chamber are respectively provided with a sewage pipe and a rainwater drainage pipe; The lower part of the water storage bend of the initial rainwater collecting pipe is provided with a cleaning opening; The sewage interception plate, the sediment tank, the timing tank and the initial rainwater collecting pipe are integrally formed and are made of stainless steel or high-strength plastic material. ​ 2. The separate quality and separate flow type gutter inlet according to claim 1, characterized in that: The right side of the support is connected with the sewage interception plate through a limiting spring, and a connecting device for realizing the separation and combination of the sewage interception plate and the right side support by controlling the weight of the upper part of the sewage interception plate can also be used.

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