First rain collection pool with automatic discharge of later rainwater

Abstract

The present invention discloses a first rain collection pool with automatic abandonment of later rainwater, which belongs to the field of rainwater treatment and comprises: a first rain collection pool, the first rain collection pool comprises a collection pool body, a drainage assembly is connected to one side of the collection pool body, the drainage assembly comprises a drainage base connected to the collection pool body, the top surface of the drainage base is flush with the top surface of the collection pool body, the drainage base has a drainage channel that is horizontally arranged and connected to the collection pool body, the bottom surface of the drainage channel is spaced from the top surface of the collection pool body, a trash rack is provided at the connection between the collection pool body and the drainage channel, and a drainage channel connected to the drainage channel is provided on the side of the drainage base. The present invention reduces the dilution effect of later rain on first rain, improves the sedimentation rate of pollutants in rainwater, efficiently collects and purifies first rain and later rain, solves the problem of runoff pollution caused by rainwater to cities, can be widely used in the construction of sponge cities, and has the characteristics of good compatibility.

Description

Technical Field

[0001] The invention belongs to the field of rainwater treatment, and in particular relates to an initial rainwater collection pool with automatic discarding of later rainwater. Background Art

[0002] Related studies show that the initial scouring effect of rainwater outflow from small catchments is obvious, that is, the pollutant content of the initial rainwater is high, and the later rainwater is relatively clean. For example, the water quality of the outflow from the rainwater outlet of a small and medium-sized city in East China was calculated, and the results are as follows: Figure 1 As shown in the figure, it can be seen that the rainwater runoff pollution in the early stage of rainfall is more serious, because the initial rainwater is mixed with a large amount of dust and silt, and the content of organic pollutants is high, and the rainwater quality is very poor. The serious pollution of rainwater runoff in the early stage of rainfall can be proved in domestic and foreign research. Therefore, the treatment and disposal of initial rainwater is the key technology for rainwater recycling. At present, the initial rainwater runoff is mostly disposed of by abandoning the flow. The abandoned rainwater should be treated, such as being discharged into the municipal sewage network (or the combined rainwater and sewage network) and centrally treated by the sewage treatment plant. The existing technology provides a variety of solutions for the treatment of multiple initial rains, as follows:

[0003] Prior art 1, the invention discloses an initial rainwater discharge device, including a well body and an inlet pipe, an outlet pipe and a discharge pipe arranged horizontally on the well body, the discharge pipe is lower in height than the outlet pipe, a filtering device is arranged at the outlet pipe in the well body, and a float flow limiting valve is arranged at the discharge pipe in the well body; the float flow limiting valve includes a mounting plate, a pipe cover, a float and a rod-shaped connecting member hinged to the mounting plate, the pipe cover and the float are connected to the end of the rod-shaped connecting member and are located on both sides of the discharge pipe in the initial state, the rod-shaped connecting member is respectively provided with an initial state adjustment device and a closing limit device on both sides, and the float flow limiting valve is connected to the well body through a mounting plate. The invention has a simple structure and is easy to install. It can complete the automatic discharge of pollutants in the early stage and the filtration of rainwater collected in the later stage. It does not require electrical equipment and is safe, environmentally friendly, energy-saving and durable.

[0004] Prior art 2, this invention discloses a system for collecting and treating initial rain with a self-cleaning function, which belongs to the field of rainwater treatment technology, and includes a buffer tank and a regulating tank; the buffer tank is provided with a water inlet and a water outlet; a self-cleaning horizontal grid is provided between the buffer tank and the regulating tank; a hydraulic particle separator is provided in the regulating tank; a water trough is connected above the hydraulic particle separator; the bottom of the regulating tank has a slope; an intelligent flushing device and a submersible sewage pump are also provided in the regulating tank. This invention has a simple structure, low manufacturing cost, and is easy to install and use. It can quickly and conveniently filter and settle the initial rainwater, and at the same time, it can output the treated rainwater in real time for users to use. At the same time, this system can conveniently realize the self-cleaning function after completing the collection and treatment of the initial rainwater.

[0005] Prior art 1: CN 105201067 A

[0006] Prior art 2: CN 105155615 A

[0007] For the existing technology, it pays more attention to the separation of initial rain and later rain. Taking into account that the later rain is cleaner, more technical solution improvements are provided for how to reasonably and effectively collect the later rain. However, for the existing technology, there is still room for improvement in how to reasonably separate initial rain and later rain and in the purification and discharge of initial rain and later rain. Summary of the invention

[0008] The purpose of the present invention is to provide a first rain collection pool with automatic discharge of later rainwater, which can reduce the dilution effect of later rain on initial rain, improve the sedimentation rate of pollutants in rainwater, efficiently collect and purify initial rain and later rain, and solve the problem of runoff pollution caused by rainwater to cities. The first rain collection pool can be used on a large scale in the construction of sponge cities, reduces investment and occupied land area, and has the characteristics of good compatibility.

[0009] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a first rain collection pool with automatic discharge of late rainwater, including: a first rain collection pool, the first rain collection pool includes a collection pool body, and is characterized in that: a drainage component is connected to one side of the collection pool body, the drainage component includes a drainage base connected to the collection pool body, the top surface of the drainage base is flush with the top surface of the collection pool body, the drainage base has a drainage channel that is horizontally arranged and connected to the collection pool body, the bottom surface of the drainage channel is spaced from the top surface of the collection pool body, a trash rack is provided at the connection between the collection pool body and the drainage channel, and a drainage channel connected to the drainage channel is provided on the side of the drainage base. The above scheme takes into account that existing regulating and storage tanks, retention tanks, regulating tanks, etc., store and dispose of all designed storm outflows. Since the total outflow of the entire rainfall is large, the volume of the first rain collection pool is correspondingly large, the investment is high, and the land occupation area is large. From the perspective of reducing the total amount of pollutants, only the initial highly polluted rainwater is collected through the initial rain collection pool, and the later clean rainwater overflow is directly discharged, which reduces the dilution effect of the later rain on the initial rain. The rainwater passes through the trash rack before entering the drainage component, which effectively intercepts the pollutants and retains them in the initial rain collection pool, which also improves the precipitation of pollutants in the initial rain. At the same time, the rainwater storage volume required for the initial rain collection pool is significantly reduced, and the investment and occupied land area are reduced; the later clean rainwater adopts an automatic overflow design to solve the problem of runoff pollution caused by rainwater to the city, save energy, and have low operation and maintenance costs; due to the obvious reduction in the overall scale of the project, the requirements for engineering construction conditions are reduced, and the engineering layout design is easier and more convenient; the later rainwater discharge device is simple, the effect is stable, and it is easy to maintain.

[0010] According to one embodiment of the present invention, the drainage component is connected to the first drain pipe and / or the second drain pipe, the drainage component is connected to the first drain pipe and the second drain pipe respectively, the outlet of the drainage channel is connected to the first drain pipe, the drainage groove is connected to the second drain pipe, the outlet of the second drain pipe is connected to the purification component, and a post-rainfall collection pool is connected below the purification component. The outlet of the first drain pipe is connected to a pipe that discharges into a receiving water body such as a river, so that only the initial rain is collected and the post-rainfall is directly discarded, which effectively reduces the pollutants in the rainwater from flowing into the river and reduces the investment and the occupied land area. The scheme of connecting the drainage component to the second drain pipe realizes the collection of post-rainfall, so as to facilitate the recycling of cleaner post-rainfall to alleviate the pressure of urban water use. The second drain pipe and the first drain pipe can be selectively closed or opened, or the second drain pipe and the first drain pipe can be opened at the same time.

[0011] According to one embodiment of the present invention, a second drainage pipe body is vertically opened at the bottom of the rear rainwater collection pool, and a counterweight sealing member that can be moved up and down is inserted in the second drainage pipe body. The counterweight sealing member is a columnar structure with a circular ring fixedly connected to the side of its top surface. The diameter of the circular ring is larger than the diameter of the second drainage pipe body and the bottom of the circular ring has a sealing ring. The top surface of the counterweight sealing member is connected to the second floating body through a rope body, and a horizontally arranged first axis body and a second axis body are provided above the counterweight sealing member. The two ends of the first axis body and the two ends of the second axis body are respectively fixedly connected to the inner walls on both sides of the rear rainwater collection pool, and the rope body connecting the second floating body passes through the space between the first axis body and the second axis body and contacts the surfaces of the first axis body and the second axis body respectively. When the mode of collecting the rear rain is selected, the rainfall in the city may be too large and exceed the water storage capacity of the rear rain collection pool. The excess water in the rear rain collection pool is discharged by designing a second drainage pipe body. The second water pipe body is connected with a pipe that discharges into a receiving water body such as a river. The second drainage pipe body is arranged at the bottom of the rear rain collection pool to facilitate the discharge of sediments in the rear rain collection pool when discharging water to the outside. The drainage outlet of the second drainage pipe body is blocked by arranging a counterweight sealing piece in the second drainage pipe body. The up and down displacement of the counterweight sealing piece is controlled by the second float at the rear The second float uses buoyancy to pull the counterweight plugging component upward during the floating process. When the second float floats to the top of the rear rain collection pool, the counterweight plugging component is pulled completely away from the second drainage pipe body to drain the rear rain collection pool. The purpose of designing the first axis and the second axis is to limit the position of the second float. After the amount of collected water is reduced, the second float can make the counterweight plugging component seal the pipe mouth of the second drainage pipe body when the water level drops.

[0012] According to one embodiment of the present invention, the purification component includes a cylindrical hollow purification box, the upper port of the purification box is connected to the cover body, the middle part of the cover body is connected to the second drain pipe, the bottom of the purification box is provided with a first drain pipe body, the upper end surface of the rear rain collection pool is provided with a pipe opening connected to the first drain pipe body, the purification box has a coaxial permeable pipe body and a purification column body from the outside to the inside, a second flow channel is formed between the permeable pipe body and the inner wall of the purification box, a third flow channel is formed between the permeable pipe body and the purification column, a coaxial columnar structure first flow channel is opened in the middle of the purification column, a coaxial support bottom plate is provided at the bottom of the permeable pipe body, the support plate body is connected to the bottom surface of the purification column and a through hole connected to the first flow channel is opened in the middle of the support plate body, and there is a distance between the bottom surface of the support plate body and the bottom surface of the purification box. The purification column is filled with filter material, and the surface of the permeable pipe body is provided with permeable holes. The cover body is connected to the second drainage pipe, and the rear rain is discharged into the purification box through the second drainage pipe. In the process of the rear rain entering the purification box, the purification of the rear rain and the water delivery amount are adjusted according to the incoming flow. When the flow rate is small, the rear rain first flows in the third flow channel, and the water in the third flow channel flows to both sides. A part of the water passes through the purification column to purify the pollutants in the rainwater. The purified water flows downward through the first flow channel opened in the middle of the purification column and directly reaches the first drainage pipe body. The other part of the water passes through the permeable pipe body, and the surface of the permeable pipe body A water-permeable hole is provided to intercept large particle pollutants in the rainwater. After passing through the permeable pipe body, the rainwater enters the second flow channel until the bottom of the second flow channel and then passes through the permeable pipe body again to enter the first drainage pipe body. The permeable pipe body can be used to intercept the particle pollutants in the rainwater in the second flow channel and the third flow channel respectively. The rainwater entering the purification box is purified in the above manner. It is automatically diverted according to the flow rate of the water body entering the purification box, and the flow into the first flow channel and the second flow channel is adjusted. The flow of rainwater between the flow channels extends the flow path of rainwater in the purification box, which is beneficial to improving the purification effect.

[0013] According to one embodiment of the present invention, a first flow guide is provided on the upper part of the water permeable pipe body, the middle part of the first flow guide has an opening with the same diameter as the inner diameter of the water permeable pipe body, and the opening is connected to a cylindrical tubular flow guide ring, the top surface of the flow guide ring is flush with the first flow guide, the bottom surface of the flow guide ring is smaller than the diameter of the opening in the middle part of the first flow guide, the side of the first flow guide is fixed to the purification box, a second diversion hole is provided on the ring surface of the flow guide ring, the bottom surface of the flow guide ring is connected to the diversion pipe body with the same diameter, the side of the diversion pipe body is surrounded by a first diversion hole, an inclined plate is provided on the outside of the diversion pipe body, and the inclined plate is arranged near the first diversion hole so that the water flowing out of the first diversion hole flows upward, the bottom surface of the diversion pipe body is sealed, and a purification column is provided between the support bottom plate and the bottom surface of the diversion pipe body. There is a gap between the surface of the first flow guide and the bottom surface of the cover body. The first diversion piece is designed to concentrate the rainwater entering the purification box in the middle part above the purification box so that it can be concentrated and flow into the diversion pipe body. The rainwater then flows out from the first diversion hole on the side of the diversion pipe body into the third flow channel. The rainwater can also enter the third flow channel from the second diversion hole of the guide ring of the first diversion piece. Due to the inclined plate body provided on the side of the first diversion hole, the rainwater passing through the first diversion hole flows upward and then falls under the action of gravity. At the same time, the horizontal height position of the second diversion hole is higher than the first diversion hole. In this way, the rainwater discharged from the second diversion hole and the rainwater discharged upward from the first diversion hole produce a certain confluence, which can increase the contact amount of particles in the rainwater, agglomerate and improve the sedimentation of particles in the rainwater. In the process of the rear rain continuously passing through the purification component and entering the rear rain collection pool, the purification component continuously purifies the rainwater, and the pollutants in the rainwater are A large amount of pollutants are intercepted in the purification component, and the purification component can still maintain a good water flow effect to avoid clogging of the purification component. Specifically: the rainwater entering the purification box is first diverted through the first diversion hole and the second diversion hole to enter the third flow channel respectively. Some pollutants may settle in the diversion pipe body and remain in the diversion pipe body. The rainwater can still enter the third flow channel through the second diversion hole to avoid clogging of the water channel. The purification column has a purifying effect on rainwater, and its water permeability is poorer than that of the permeable pipe body. When the amount of rainwater entering the purification box is too large, a large amount of rainwater can enter the first drainage pipe body through the second flow channel, so as to avoid the reduction of the water flow effect of the purification component when the purified water is overloaded. The rainwater in each water flow channel flows back at the first drainage pipe body to avoid turbulence in the water body entering the rear rain collection pool, causing the sediment at the bottom of the rear rain collection pool to be re-suspension.

[0014] According to one embodiment of the present invention, a partition plate is horizontally provided in the main body of the collecting pool, the surface of the partition plate is flush with the bottom surface of the drainage channel, a first flow hole is provided on the partition plate, a guide assembly is provided in the main body of the collecting pool below the partition plate, the guide assembly includes a hollow guide base, the upper part of the guide base passes through the bottom seal and the upper part of the guide base is connected to the guide sleeve, the bottom diameter of the guide sleeve is equal to the top opening of the guide base, the top diameter of the guide sleeve is smaller than the bottom diameter of the bottom, the top of the guide sleeve is connected to the first flow hole, a coaxial first partition plate is provided at the bottom of the guide base, the upper surface of the first partition plate is connected to the first floating body through a first rope body, the inner wall of the guide base is obliquely connected to the guide inclined plate, and the guide base at the bottom of the guide inclined plate is provided with a guide hole. The pool surface of the collection pool body is sealed by using a partition plate. In order to facilitate the entry of initial rain into the collection pool body, a first flow hole is opened to allow the initial rain to enter the collection pool body below the partition plate. The designed diversion component is used to regulate the flow path of the initial rain entering the collection pool body to reduce the initial rain in a turbulent state from entering the initial rain collection pool. Specifically, the initial rain flows along the diversion inclined plate by opening a diversion hole, so that the water entering the initial rain collection pool flows in a laminar state. The diversion inclined plate and the diversion hole designed in this way are conducive to By increasing the number of laminar flows, the initial rain in the guide base is diverted into the initial rain collection pool. The design of the guide component effectively avoids the phenomenon in the prior art that the initial rain collection pool collects large amounts of turbulence in various water bodies and it is difficult to achieve the sedimentation of particulate matter. The guide base rectifies and diverts the rainwater entering the initial rain collection pool through the connection between the guide sleeve and the first flow hole on the partition plate. After the water volume in the initial rain collection pool reaches the preset storage capacity, the first float floats up to seal the upper opening of the guide sleeve to prevent the later rain from entering the main body of the collection pool, thereby solving the problem of difficulty in separating the later rain from the initial rain and the dilution of the initial rain by the later rain.

[0015] According to one embodiment of the present invention, a vertically arranged support rod is provided between the bottom surface of the partition plate and the inner bottom surface of the collection pool body, a rotatable buffer base is sleeved on the support rod, a bearing ring is provided at the connection between the buffer base and the support rod, the buffer base has a rectangular cross-section, the cross-section is perpendicular to the axis of the buffer base, and the cross-sectional areas of the two ends of the buffer base decrease toward the middle of the buffer base. The support rod is used to support the partition plate and improve the stability between the partition plate and the collection pool body. It is not easy to set a buffer base at the bottom of the support rod to avoid disturbing the sediment at the bottom of the collection pool body. The initial rain flowing out from the guide base is rectified and presents a laminar state in the collection pool body. The designed buffer base is used to slow down the flow speed of these laminar flows in the collection pool body to reduce the disturbance of the water body in the pool and the re-suspension rate of the sediment in the pool. The laminar flow contacts the side of the buffer base in the process of passing through the surface of the buffer base or causes the buffer base to rotate relative to the support rod to reduce the flow rate of the laminar flow. In addition, the laminar water body contacts the buffer base in the process of contacting the buffer base, and the downward fluid can be gathered to the middle along the upper and lower slopes of the buffer base, which is conducive to reducing the height range of the water layer where the laminar flow is located to avoid the influence between the upper and lower laminar flows. The reduction in the height range of the water layer is also conducive to the mutual contact and adsorption between particles in the water body to increase the sedimentation rate of the particles.

[0016] According to one embodiment of the present invention, a sewage pump is provided outside the main body of the collection pool, and the sewage pump is connected to the inside of the main body of the collection pool through a pipe body. The initial rain stored in the main body of the collection pool needs to be centrally treated in the later stage, and the sewage pump is used to pump out the water in the main body of the collection pool and send it to the sewage treatment plant for treatment. Of course, the design of the sewage pump can also be used to extract pollutants deposited at the bottom of the collection pool, and clean the main body of the collection pool to increase the volume of the main body of the collection pool. Generally, the cleaning work in the main body of the collection pool is carried out every 3 months. In cities with more rainfall and more rainfall, the frequency of cleaning can be shortened to 2 months.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes a significant reduction in the rainwater storage volume required for the initial rain collection pool, thereby reducing investment and occupied land area; the later clean rainwater adopts an automatic overflow design, which solves the problem of runoff pollution caused by rainwater to the city and saves energy, with low operation and maintenance costs; since the overall scale of the project is significantly reduced, the requirements for project construction conditions are reduced, and the project layout design is easier and more convenient; the later rainwater discharge device is simple, the effect is stable, and it is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The relationship between the pollutant mass and outflow rainwater volume under heavy rain in the catchment area of ​​a small or medium-sized city in East China;

[0019] Figure 2 A schematic diagram of a scheme of a first rain collection pool with automatic discard of later rainwater;

[0020] Figure 3 A top view of a scheme of a first rain collection pool with automatic discard of later rainwater;

[0021] Figure 4 It is a schematic diagram of the drainage component;

[0022] Figure 5 for Figure 4 Middle aa section view;

[0023] Figure 6 for Figure 4 Middle bb section view;

[0024] Figure 7 for Figure 4 Middle cc section view;

[0025] Figure 8 A schematic diagram of another scheme of a first rain collection pool with automatic discard of later rainwater;

[0026] Fig. 9 It is a schematic diagram of the interior of the diversion component;

[0027] Fig.10 It is a schematic diagram of the connection between the buffer base and the support rod;

[0028] Fig.11 A top view of another scheme of a first rain collection pool with automatic discard of later rainwater;

[0029] Fig.12 This is a schematic diagram of the interior of the rear rain collection pool;

[0030] Fig.13 This is a schematic diagram of the interior of the purification component;

[0031] Fig.14 for Fig.13 Enlarged schematic diagram of the middle M part;

[0032] Fig.15 These are the test results of water quality indicators for each group.

[0033] Figure numbers: 10-drainage assembly; 11-drainage base; 12-drainage channel; 13-drainage channel; 14-trash rack; 15-drainage channel; 20-initial rain collection pool; 21-collection pool body; 22-sewage pump; 30-partition plate; 31-first flow hole; 40-flow guide assembly; 41-flow guide sleeve; 42-first floating body; 43-flow guide base; 44-first rope body; 45-first partition plate; 46-flow guide inclined plate; 47-flow guide hole; 50-support rod; 51-buffer base; 52-bearing ring; 60-first drain pipe; 70-second Drain pipe; 80-purification assembly; 81-first drainage pipe body; 82-cover body; 83-first drainage piece; 84-diversion pipe body; 85-purification box; 86-permeable pipe body; 87-support bottom plate; 88-purification column; 89-first flow passage; 810-second flow passage; 811-third flow passage; 812-first diversion hole; 813-second diversion hole; 90-rear rainwater collection pool; 91-second float; 92-first shaft body; 93-second shaft body; 94-weighted plugging piece; 95-second drainage pipe body; A design water level; h design water depth. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below in conjunction with specific implementations and drawings:

[0035] Embodiment 1:

[0036] See attached Figure 2-14As shown, the initial rain collection pool with automatic discharge of late rainwater comprises: an initial rain collection pool 20, the initial rain collection pool 20 comprises a collection pool body 21, and is characterized in that: a drainage assembly 10 is connected to one side of the collection pool body 21, the drainage assembly 10 comprises a drainage base 11 connected to the collection pool body 21, the top surface of the drainage base 11 is flush with the top surface of the collection pool body 21, the drainage base 11 has a drainage channel 12 arranged horizontally and connected to the collection pool body 21, the bottom surface of the drainage channel 12 is spaced from the top surface of the collection pool body 21, a trash rack 14 is provided at the connection between the collection pool body 21 and the drainage channel 12, and a drainage channel 13 connected to the drainage channel 12 is provided on the side of the drainage base 11. The above scheme takes into account that the existing regulating and storage tanks, retention tanks, regulating tanks, etc. store and treat all the designed storm outflows. Since the total outflow of the entire rainfall is large, the volume of the initial rain collection pool is correspondingly large, the investment is high, and the land occupation area is large. From the perspective of reducing the total amount of pollutants, only the initial highly polluted rainwater is collected through the initial rain collection pool 20, and the later clean rainwater overflow is directly discharged, which reduces the dilution effect of the later rain on the initial rain. The rainwater passes through the trash rack 14 before entering the drainage component 10, and the pollutants are effectively intercepted and retained in the initial rain collection pool 20, which also improves the precipitation of pollutants in the initial rain. At the same time, the rainwater storage volume required for the initial rain collection pool 20 is significantly reduced, and the investment and occupied land area are reduced; the later clean rainwater adopts an automatic overflow design to solve the problem of runoff pollution caused by rainwater to the city, save energy, and have low operation and maintenance costs; due to the obvious reduction in the overall scale of the project, the requirements for engineering construction conditions are reduced, and the engineering layout design is easier and more convenient; the later rainwater discharge device is simple, the effect is stable, and it is easy to maintain.

[0037] The drainage component 10 is connected to the first drainage pipe 60 and / or the second drainage pipe 70. The drainage component 10 is communicated with the first drainage pipe 60 and the second drainage pipe 70 respectively. The drainage channel outlet 12 is connected to the first drainage pipe 60, the drainage groove 13 is connected to the second drainage pipe 70, the outlet of the second drainage pipe 70 is connected to the purification component 80, and a rear rain collection pool 90 is connected below the purification component 80. The outlet of the first drainage pipe 60 is communicated with a pipeline that discharges into a receiving water body such as a river, so that only the initial rain can be collected and the rear rain can be directly discarded, which effectively reduces the pollutants in the rainwater from flowing into the river and reduces the investment and the occupied land area. The scheme of connecting the drainage component 10 to the second drainage pipe 70 realizes the collection of the rear rain, so as to recycle the cleaner rear rain to relieve the urban water pressure. The second drainage pipe 70 and the first drainage pipe 60 can be selectively closed or opened, or the second drainage pipe 70 and the first drainage pipe 60 can be opened at the same time.

[0038] A second drainage pipe body 95 is vertically opened at the bottom of the rear rain collection pool 90, and a counterweight sealing member 94 that can be moved up and down is inserted into the second drainage pipe body 95. The counterweight sealing member 94 is a columnar structure with a circular ring fixed on the side of its top surface. The diameter of the circular ring is larger than the diameter of the second drainage pipe body 95 and the bottom of the circular ring has a sealing ring. The top surface of the counterweight sealing member 94 is connected to the second floating body 91 through a rope body, and a horizontally arranged first shaft body 92 and a second shaft body 93 are provided above the counterweight sealing member 94. The two ends of the first shaft body 92 and the two ends of the second shaft body 93 are respectively fixed to the inner walls on both sides of the rear rain collection pool 90, and the rope connecting the second floating body 91 passes through the space between the first shaft body 92 and the second shaft body 93 and contacts the surfaces of the first shaft body 92 and the second shaft body 93 respectively. When the mode of collecting the after-rainfall is selected, the rainfall in the city may be too large and exceed the water storage capacity of the after-rainfall collection pool 90. The second drainage pipe body 95 is designed to discharge the excess water in the after-rainfall collection pool 90. The second water pipe body 95 is connected to the pipeline that discharges into the receiving water body such as the river. The second drainage pipe body 95 is arranged at the bottom of the after-rainfall collection pool 90 to facilitate the discharge of the sediment in the after-rainfall collection pool when discharging the water outward. The drainage outlet of the second drainage pipe body 95 is blocked by arranging a counterweight sealing member 94 in the second drainage pipe body 95. The up and down displacement of the counterweight sealing member 94 is controlled by the second float 91 in the after-rainfall collection pool 90. The second float 91 is controlled by the up and down floating inside, that is, as the water level in the rear rain collection pool 90 continues to rise, the second float 91 rises accordingly. During the floating process, the second float 91 uses the buoyancy to pull the counterweight sealing component 94 upward. When the second float 91 floats to the top of the rear rain collection pool 90, the counterweight sealing component 94 is pulled to completely leave the second drainage pipe body 95 to achieve drainage of the rear rain collection pool 90. The designed first axis 92 and second axis 93 are intended to limit the position of the second float 91. After the collected water volume is reduced, the second float 91 can make it easier for the counterweight sealing component 94 to seal the pipe mouth of the second drainage pipe body 95 as the water level drops.

[0039] The purification assembly 80 includes a cylindrical hollow purification box 85, the upper end of the purification box 85 is connected to the cover body 82, the middle of the cover body 82 is connected to the second drain pipe 70, the bottom of the purification box 85 is provided with a first drain pipe body 81, and the upper end surface of the rear rain collection pool 90 has a pipe opening connected to the first drain pipe body 81. The purification box 85 has a coaxial permeable pipe body 86 and a purification column 88 arranged from the outside to the inside, a second flow channel 810 is formed between the permeable pipe body 86 and the inner wall of the purification box 85, a third flow channel 811 is formed between the permeable pipe body 86 and the purification column 88, a coaxial columnar structure first flow channel 89 is opened in the middle of the purification column 88, a coaxial support bottom plate 87 is provided at the bottom of the permeable pipe body 86, the support plate body 87 is connected to the bottom surface of the purification column 88, and a through hole connected to the first flow channel 89 is opened in the middle of the support plate body 87, and the bottom surface of the support plate body 87 is spaced from the bottom surface of the purification box 85. The purification column 88 is filled with filter material, and the surface of the permeable pipe body 86 is provided with permeable holes. The cover body 82 is connected to the second drain pipe 70, and the rear rain is discharged into the purification box 85 through the second drain pipe 70. In the process of the rear rain entering the purification box 85, the purification of the rear rain and the water delivery amount are adjusted according to the incoming flow rate. When the flow rate is small, the rear rain first flows in the third flow channel 811, and the water in the third flow channel 811 flows to both sides. A part of the water passes through the purification column 88 to purify the pollutants in the rainwater. The purified water flows downward through the first flow channel 89 opened in the middle of the purification column 88 and directly reaches the first drain pipe body 81. The other part of the water passes through the permeable pipe body 86. The surface of the permeable pipe body 86 There are water-permeable holes on the surface to intercept large particle pollutants in the rainwater. The rainwater passes through the permeable pipe body 86 and enters the second flow channel 810 until the bottom of the second flow channel 810 and then passes through the permeable pipe body 86 again to enter the first drainage pipe body 81. The permeable pipe body 86 can be used to intercept the particle pollutants in the rainwater in the second flow channel 810 and the third flow channel 811 respectively. The rainwater entering the purification box 85 is purified in the above manner. It is automatically diverted according to the flow rate of the water body entering the purification box 80, and the flow rate entering the first flow channel 89 and the second flow channel 810 is adjusted. The flow of rainwater between the flow channels extends the flow path of rainwater in the purification box 85, which is beneficial to the improvement of the purification effect.

[0040] A first guide member 83 is provided on the upper part of the permeable pipe body 86. The middle part of the first guide member 83 has an opening with the same diameter as the inner diameter of the permeable pipe body 86, and the opening is connected to a cylindrical tubular guide ring. The top surface of the guide ring is flush with the first guide member 83, and the bottom surface of the guide ring is smaller than the diameter of the opening in the middle part of the first guide member 83. The side of the first guide member 83 is fixed to the purification box 85. A second diversion hole 813 is provided on the ring surface of the guide ring. The bottom surface of the guide ring is connected to a diversion pipe body 84 of the same diameter. A first diversion hole 812 is provided around the side of the diversion pipe body 84. An inclined plate is provided on the outer side of the diversion pipe body 84, and the inclined plate is provided near the first diversion hole 812 to make the water flowing out of the first diversion hole 812 flow upward. The bottom surface of the diversion pipe body 84 is sealed, and a purification column 88 is provided between the supporting bottom plate 87 and the bottom surface of the diversion pipe body 84. There is a distance between the surface of the first flow guiding member 83 and the bottom surface of the cover body 82 . The first guide member 83 is designed to concentrate the rainwater entering the purification box 85 in the middle part above the purification box 85 so as to make it flow into the diverter pipe body 84. The rainwater then flows out from the first diverter hole 812 on the side of the diverter pipe body 84 and enters the third flow channel 811. The rainwater can also enter the third flow channel 811 from the second diverter hole 813 of the guide ring of the first guide member 813. Due to the inclined plate body provided on the side of the first diverter hole 812, the rainwater passing through the first diverter hole 812 flows upward and then falls under the action of gravity. At the same time, the horizontal height position of the second diverter hole 813 is higher than the first diverter hole 812. In this way, the rainwater discharged from the second diverter hole 813 and the rainwater discharged upward from the first diverter hole 812 produce a certain confluence, which can increase the contact amount of particles in the rainwater, agglomerate and improve the sedimentation of particles in the rainwater. In the process of the rear rain continuously passing through the purification component 80 and entering the rear rain collection pool 90, the purification component 80 continuously purifies the rainwater. The pollutants are largely retained in the purification component 80, and the purification component 80 can still maintain a good water flow effect to avoid clogging of the purification component 80. Specifically: the rainwater entering the purification box 85 is first shunted through the first diversion hole 812 and the second diversion hole 813 to enter the third flow channel 811 respectively. Some pollutants may settle in the diversion pipe body 84 and remain in the diversion pipe body 84. The rainwater can still enter the third flow channel 811 through the second diversion hole 813 to avoid clogging of the water channel. The purification column 89 has a purifying effect on rainwater, and its water permeability is poorer than that of the permeable pipe body 86. When the amount of rainwater entering the purification box 85 is too large, a large amount of rainwater can enter the first drainage pipe body 81 through the second flow channel 810. In this way, the water flow effect of the purification component 80 is reduced when the purified water is overloaded. The rainwater in each water flow channel flows back at the first drainage pipe body 81 to avoid turbulence in the water body entering the rear rain collection pool 90, which causes the sediment at the bottom of the rear rain collection pool 90 to be re-suspension.

[0041] A partition plate 30 is horizontally arranged in the collecting pool body 21, and the surface of the partition plate 30 is flush with the bottom surface of the drainage channel 12. A first flow hole 31 is opened on the partition plate 30. A guide assembly 40 is arranged in the collecting pool body 21 below the partition plate 30. The guide assembly 40 includes a hollow guide base 43. The upper part of the guide base 43 passes through the bottom seal and the upper part of the guide base 43 is connected to the guide sleeve 41. The bottom diameter of the guide sleeve 41 is equal to the top opening of the guide base 43. The top diameter of the guide sleeve 41 is smaller than the bottom diameter of the bottom. The top of the guide sleeve 41 is connected to the first flow hole 31. A coaxial first partition plate 45 is arranged at the bottom of the guide base 43. The upper surface of the first partition plate 45 is connected to the first float 42 through the first rope body 44. The inner wall of the guide base 43 is obliquely connected to the guide inclined plate 46, and the guide base 43 at the bottom of the guide inclined plate 46 is provided with a guide hole 47. The pool surface of the collection pool body 21 is sealed by using a partition plate 30. In order to facilitate the entry of the initial rain into the collection pool body 21, the first flow hole 31 is opened to allow the initial rain to enter the collection pool body 21 below the partition plate 30. The designed flow guide component 40 is used to regulate the flow path of the initial rain entering the collection pool body 21 to reduce the initial rain in a turbulent state from entering the initial rain collection pool 21. Specifically, the initial rain flows along the flow guide inclined plate 46 by opening the flow guide holes 47, so that the water entering the initial rain collection pool 21 flows in a laminar state. The flow guide base 43 flows from high to low through the designed flow guide inclined plate 46 and then the flow guide holes 47. 7 is conducive to increasing the number of laminar flows, so that the initial rain in the guide base 43 is diverted into the initial rain collection pool 21. The design of the guide component 40 effectively avoids the phenomenon in the prior art that the initial rain collection pool collects water from various places and the turbulence volume is large and it is difficult to achieve the sedimentation of particles. The guide base 43 rectifies and diverts the rainwater entering the initial rain collection pool 21 through the connection between the guide sleeve 41 and the first flow hole 31 on the partition plate 30. After the water volume in the initial rain collection pool 21 reaches the preset storage capacity, the first float 42 floats up to block the upper opening of the guide sleeve 41 to prevent the later rain from entering the collection pool body 21, thereby solving the problem that the later rain is difficult to separate from the initial rain and the later rain dilutes the initial rain.

[0042] A vertically arranged support rod 50 is provided between the bottom surface of the partition plate 30 and the inner bottom surface of the collecting tank body 21, and a rotatable buffer base 51 is sleeved on the support rod 50. A bearing ring 52 is provided at the connection between the buffer base 51 and the support rod 50. The cross-section of the buffer base 51 is rectangular, and the cross-section is perpendicular to the axis of the buffer base 51. The cross-sectional areas of the two ends of the buffer base 51 decrease toward the middle of the buffer base 51. The support rod 50 is used to support the partition plate 30 to improve the stability between the partition plate 30 and the collection pool body 21. A buffer base 51 is not easily set at the bottom of the support rod 50 to avoid disturbing the sediment at the bottom of the collection pool body 21. The initial rain flowing out from the guide base 43 is rectified and presents a laminar state in the collection pool body 21. The designed buffer base 51 is used to slow down the flow speed of these laminar flows in the collection pool body 21 to reduce the disturbance of the water body in the pool and the re-suspension rate of the sediment in the pool. The laminar flow contacts the side of the buffer base 51 or causes the buffer base 51 to rotate relative to the support rod 50 in the process of passing through the surface of the buffer base 51 to reduce the flow rate of the laminar flow. In addition, when the laminar water body contacts the buffer base 51, the upper and lower slopes of the buffer base 51 can make the downward fluid gather toward the middle, which is beneficial to reducing the height range of the water layer where the laminar flow is located to avoid the influence between the upper and lower laminar flows. The reduction in the height range of the water layer is also conducive to the mutual contact and adsorption between particles in the water body to increase the sedimentation rate of the particles.

[0043] A sewage pump 22 is provided outside the collection pool body 21, and the sewage pump 22 is connected to the inside of the collection pool body 21 through a pipe body. The initial rain stored in the collection pool body 21 needs to be centrally treated in the later stage, and the sewage pump 22 is used to pump out the water in the collection pool body 21 and send it to the sewage treatment plant for treatment. Of course, the design of the sewage pump 22 can also be used to extract pollutants deposited at the bottom of the collection pool 21, and clean the collection pool body 21 to increase the volume of the collection pool 21. Generally, the cleaning work in the collection pool body 21 is carried out every 3 months. In cities with more rainfall and more rainfall, the frequency of cleaning can be shortened to 2 months.

[0044] Embodiment 2:

[0045] The initial rain collection pool with automatic discharge of later rainwater of the present invention has the following initial rain collection method: the initial rain collection pool 20 is empty before rainfall, and the initial rainwater directly enters the collection pool body 21. As the water level component increases, the water level of the initial rain collection pool gradually reaches the designed water level height h, at which time the later rainwater overflows from the drainage component 10, and the overflowed clean rainwater is discharged into receiving water bodies such as rivers and lakes through the first drainage pipe 60 connected thereto.

[0046] Embodiment 3:

[0047] The method for collecting initial rain in the initial rain collection pool with automatic discharge of later rainwater of the present invention is as follows: before rainfall, the initial rain collection pool 20 is empty, and the initial rainwater directly enters the collection pool body 21. As the water level component increases, when the water level of the initial rain collection pool gradually reaches the designed water level height h, the first float 41 blocks the first flow hole 31 to prevent the later rain from entering the collection pool body 21 below the partition plate 30. At this time, the later rainwater overflows from the drainage component 10, and the overflowed clean rainwater is discharged into the purification component 80 through the second drainage pipe 70 connected thereto, and is discharged into the later rain collection pool 90 after purification by the purification component 80. When the urban rainfall is too large and exceeds the water storage capacity of the later rain collection pool 90, the second drainage pipe body 95 is designed to discharge the excess water in the later rain collection pool 90, and the second water pipe body 95 is connected to a pipeline that discharges into a receiving water body such as a river.

[0048] Embodiment 4:

[0049] This embodiment is optimized as follows based on the scheme of Embodiment 1: a third sewage collecting tank (not shown in the figure) is opened on the water inlet side of the initial rain collecting tank 20, the surface height of the third sewage collecting tank is equal to the surface height of the initial rain collecting tank 20, the depth of the third sewage collecting tank is less than the initial rain collecting tank 20, generally the depth of the third sewage collecting tank is 20-100cm, the third sewage collecting tank is designed to perform primary filtration on rainwater that is about to flow through the initial rain collecting tank 20, and objects such as leaves, trunks, and garbage in the initial rain flowing above the third sewage collecting tank fall into the third sewage collecting tank under the action of gravity, preventing such garbage from entering the initial rain collecting tank 20 or the post-rain collecting tank 90.

[0050] Comparative Example 1:

[0051] On the basis of the scheme of Example 1, the rear rain is collected by using a filter plate and a sandbox instead of the purification component 80 to filter the rear rain;

[0052] Comparative Example 2:

[0053] On the basis of the scheme of Example 1, the after-rain is directly sent to the after-rain collection pool 90 without using the purification component 80 or other purification devices, but an organic flocculant is added to accelerate the sedimentation of pollutants in the after-rain.

[0054] After rain collection test:

[0055] The devices of Example 1, Comparative Example 1 and Comparative Example 2 were installed in the laboratory, and a rainfall simulator was used to simulate rainfall. The rainfall lasted for 300 minutes, and the rainfall in each group was consistent, ranging from 50 to 99 mm. After the rainfall, 10 sampling points were taken from the rear rain collection pool 90 to test the water quality, specifically testing COD cr , total phosphorus, total nitrogen, BOD5, the determination methods are shown in Table 1 below.

[0056] Table 1 Index detection method

[0057]

[0058] In the determination process, COD cr As a water quality indicator, the water quality in each group of rainwater collection pools 90 is judged. The specific results are as follows Fig.15 In addition, during the test, the water purification equipment before entering the rainwater collection pool of each group was observed and recorded to see if it was blocked. The results are shown in Table 2. Fig.15 It can be seen that the mass of the after-rain collected in Example 1 is higher than that of the after-rain collected in Comparative Examples 1 and 2.

[0059] Table 2 Blockage of water purification equipment in each group

[0060] Example 1 The purification component is not blocked and the water flows smoothly Comparative Example 1 Backflow Comparative Example 2 none

[0061] The above are the basic principles, basic ideas and main features of the setting structure of this patent. Several changes and deformations can be made to this patent without changing the patent principles, which also fall within the scope of protection of this patent.

Claims

1. A primary rainwater collection pool with automatic discard of later rainwater, including: A primary rain collection pool (20), the primary rain collection pool (20) comprising a collection pool body (21), characterized in that: a drainage assembly (10) is connected to one side of the collection pool body (21), the drainage assembly (10) comprises a drainage base (11) connected to the collection pool body (21), the top surface of the drainage base (11) is arranged flush with the top surface of the collection pool body (21), the drainage base (11) has a drainage channel (12) arranged horizontally and connected to the collection pool body (21), the bottom surface of the drainage channel (12) is spaced from the top surface of the collection pool body (21), a trash rack (14) is provided at the connection between the collection pool body (21) and the drainage channel (12), and a drainage through groove (13) connected to the drainage channel (12) is provided on the side of the drainage base (11); The drainage component (10) is connected to a first drainage pipe (60) and a second drainage pipe (70); the water outlet of the drainage channel (12) is connected to the first drainage pipe (60); the drainage groove (13) is connected to the second drainage pipe (70); the water outlet of the second drainage pipe (70) is connected to a purification component (80); and a rear rainwater collection pool (90) is connected below the purification component (80); A second drainage pipe body (95) is vertically provided at the bottom of the rear rainwater collection pool (90), and a counterweight plugging member (94) that can move up and down is inserted into the second drainage pipe body (95). The counterweight plugging member (94) is a columnar structure, and a circular ring is fixedly connected to the side of its top surface. The diameter of the circular ring is larger than the diameter of the second drainage pipe body (95), and the bottom surface of the circular ring has a sealing ring. The top surface of the counterweight plugging member (94) is connected to a second floating body (91) via a rope body. A first shaft body (92) and a second shaft body (93) are horizontally arranged above the counterweight plugging member (94). The two ends of the first shaft body (92) and the two ends of the second shaft body (93) are respectively fixedly connected to the inner walls of both sides of the rear rainwater collection pool (90), and the rope body connecting the second floating body (91) passes through the space between the first shaft body (92) and the second shaft body (93) and contacts the surfaces of the first shaft body (92) and the second shaft body (93) respectively. A partition plate (30) is horizontally arranged in the collecting pool body (21), the surface of the partition plate (30) being flush with the bottom surface of the drainage channel (12), the partition plate (30) being provided with a first flow hole (31), a flow guide component (40) being arranged in the collecting pool body (21) below the partition plate (30), the flow guide component (40) comprising a hollow flow guide base (43), the upper portion of the flow guide base (43) penetrating the bottom seal and the upper portion of the flow guide base (43) being connected to the flow guide sleeve (41), the bottom of the flow guide sleeve (41) being straight The diameter of the guide sleeve (41) is equal to the diameter of the top opening of the guide base (43); the top diameter of the guide sleeve (41) is smaller than the bottom diameter of the guide sleeve (41); the top of the guide sleeve (41) is connected to the first flow hole (31); a coaxial first baffle (45) is provided at the bottom of the guide base (43); the upper surface of the first baffle (45) is connected to the first floating body (42) via a first rope body (44); the inner wall of the guide base (43) is obliquely connected to a guide inclined plate (46); and a guide hole (47) is provided at the guide base (43) at the bottom of the guide inclined plate (46).

2. The initial rainwater collection pool with automatic discarding of late rainwater according to claim 1 is characterized by: The purification assembly (80) comprises a cylindrical hollow purification box (85), the upper end of the purification box (85) is connected to the cover body (82), the middle of the cover body (82) is connected to the second drainage pipe (70), the bottom of the purification box (85) has a first drainage pipe body (81), the upper end surface of the rear rain collection pool (90) has a pipe opening connected to the first drainage pipe body (81), the purification box (85) has a coaxial permeable pipe body (86) and a purification column (88) arranged from the outside to the inside, and a first permeable pipe body (86) and a purification column (88) are formed between the permeable pipe body (86) and the inner wall of the purification box (85). A second flow passage (810) is formed between the water-permeable tube body (86) and the purification column (88), a third flow passage (811) is formed between the water-permeable tube body (86) and the purification column (88), a first flow passage (89) of a coaxial columnar structure is provided in the middle of the purification column (88), a coaxial supporting bottom plate (87) is provided at the bottom of the water-permeable tube body (86), the supporting bottom plate (87) is connected to the bottom surface of the purification column (88), and a through hole communicating with the first flow passage (89) is provided in the middle of the supporting bottom plate (87), and a distance is provided between the bottom surface of the supporting bottom plate (87) and the bottom surface of the purification box (85).

3. The initial rainwater collection pool with automatic discarding of late rainwater according to claim 2 is characterized by: A first flow guide member (83) is provided on the upper portion of the water permeable pipe body (86); an opening having a diameter equal to the inner diameter of the water permeable pipe body (86) is provided in the middle of the first flow guide member (83); and a cylindrical tubular flow guide ring is connected to the opening; the top surface of the flow guide ring is flush with the first flow guide member (83); the bottom surface of the flow guide ring is smaller than the diameter of the opening in the middle of the first flow guide member (83); the side of the first flow guide member (83) is fixedly connected to the purification box (85); and a second flow diversion hole (813) is provided on the annular surface of the flow guide ring. ), the bottom surface of the guide ring is connected to a diversion tube body (84) of equal diameter, a first diversion hole (812) is formed around the side of the diversion tube body (84), an inclined plate body is provided on the outside of the diversion tube body (84), and the inclined plate body is arranged near the first diversion hole (812) so that water flowing out of the first diversion hole (812) flows upward, the bottom surface of the diversion tube body (84) is sealed, and a purification column (88) is provided between the supporting bottom plate (87) and the bottom surface of the diversion tube body (84).

4. The initial rainwater collection pool with automatic discarding of late rainwater according to claim 1 is characterized by: A vertically arranged support rod (50) is provided between the bottom surface of the partition plate (30) and the inner bottom surface of the collection tank body (21); a rotatable buffer base member (51) is sleeved on the support rod (50); a bearing ring (52) is provided at the connection between the buffer base member (51) and the support rod (50); the buffer base member (51) has a rectangular cross section, which is perpendicular to the axis of the buffer base member (51); and the cross-sectional areas of the two ends of the buffer base member (51) decrease gradually toward the middle of the buffer base member (51).

5. The initial rainwater collection pool with automatic discarding of late rainwater according to claim 1 is characterized by: A sewage pump (22) is provided outside the collection tank body (21), and the sewage pump (22) is connected to the inside of the collection tank body (21) through a pipe body.

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