Initial polluted rainwater interception system

Abstract

The utility model discloses an early-stage polluted rainwater interception system which is characterized by comprising an upstream rainwater pipeline, a rainwater front-end overflowing well, a rainwater collecting pool and a later-stage rainwater overflowing well, the upstream rainwater pipeline is communicated with the rainwater front-end overflowing well, the rainwater collecting pool is communicated with the rainwater front-end overflowing well, and the later-stage rainwater overflowing well is communicated with the rainwater front-end overflowing well. A first electric gate plate door is arranged between the rainwater collecting pool and the rainwater front-end overflowing well, the later rainwater overflowing well is communicated with the rainwater front-end overflowing well, and a second electric gate plate door is arranged between the later rainwater overflowing well and the rainwater front-end overflowing well. Initial rainwater and later rainwater are separated, the rainwater treatment cost can be effectively reduced, pollution of the initial rainwater to the surface water environment can be prevented, the later rainwater can be effectively utilized, and available water resources are not wasted.

Description

Technical Field

[0001] The utility model relates to an initial polluted rainwater interception system, belonging to the technical field of polluted rainwater interception. Background Art

[0002] During the rain, the initial rainwater will wash away living areas, industrial production areas, etc., resulting in a large amount of suspended solids, organic matter, oil and other pollutants in the initial rainwater. According to statistical analysis, the COD chromium of the initial rainwater is 1500-2500mg / L; TSS is 800-1600mg / L; ammonia nitrogen is 25-50mg / L; TN is 40-100mg / L; TP is 1-5mg / L. Among them, the four indicators of COD chromium, total suspended solids, ammonia nitrogen, and total nitrogen are far higher than the concentration in domestic sewage. However, as the duration of rainfall increases, the pollutant indicators of the later rainwater have decreased significantly. The COD chromium in the later rainwater is 100-200mg / L; TSS is 50-200mg / L; ammonia nitrogen is 4-8mg / L; TN is 10-15mg / L; TP is 0.4-1mg / L.

[0003] In the current existing technology, rainwater is usually discharged directly into the river through surface runoff, or collected and treated uniformly through ground rainwater outlets before being discharged or reused. When rainwater is discharged directly into the river, the initial rainwater will cause some pollution to the environment, and the later rainwater will not be used beneficially. When rainwater is collected and treated uniformly through ground rainwater outlets, the amount of rainwater collected uniformly is large, which is difficult to treat and costly. In addition, the pollutants in the later rainwater are relatively small, and the unified treatment of initial rainwater and later rainwater causes a waste of resources.

[0004] Therefore, the initial rainwater and the later rainwater should be collected separately, which can not only prevent the pollution of the surface water environment by the initial rainwater, but also effectively utilize the later rainwater and avoid wasting the available water resources. Therefore, we proposed an initial rainwater interception system. Utility Model Content

[0005] The purpose of the utility model is to provide an initial polluted rainwater interception system, which can separate the initial rainwater and the later rainwater and treat them separately, which can not only prevent the pollution of the surface water environment by the initial rainwater, but also effectively utilize the later rainwater without wasting the available water resources, and has low processing difficulty and saves water treatment costs.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solution: an initial polluted rainwater interception system, comprising:

[0007] Upstream rainwater pipe, the water inlet end of which is connected to rainwater collection facilities such as rainwater wells and drainage channels;

[0008] A rainwater front-end flow well, wherein the upstream rainwater pipe is connected to the rainwater front-end flow well, so that rainwater enters the rainwater front-end flow well through the upstream rainwater pipe;

[0009] A rainwater collection pool, wherein the rainwater collection pool is connected to a rainwater front end flow well, and a first electric gate is provided between the rainwater collection pool and the rainwater front end flow well, and the first electric gate can control whether rainwater in the rainwater front end flow well flows into the rainwater collection pool;

[0010] An initial rainwater lifting device, wherein the initial rainwater lifting device is arranged in a rainwater collection tank, the initial rainwater lifting device is connected to a downstream initial rainwater pipe, and a water outlet of the downstream initial rainwater pipe is connected to a rainwater treatment device or other sewage treatment equipment;

[0011] A late rainwater overflow well, wherein the late rainwater overflow well is connected to the rainwater front-end flow well, and a second electric gate is provided between the late rainwater overflow well and the rainwater front-end flow well, and the second electric gate can control whether the rainwater in the rainwater front-end flow well flows into the late rainwater overflow well;

[0012] The downstream late rainwater pipe is connected to the late rainwater overflow well, and the outlet end of the downstream late rainwater pipe is connected to the late rainwater utilization equipment or other water treatment equipment.

[0013] The aforementioned initially polluted rainwater interception system also includes a rainwater volume monitoring device, which includes a rainwater volume monitoring well. A liquid level meter is provided in the rainwater volume monitoring well. The rainwater volume monitoring device can monitor the real-time rainfall.

[0014] The aforementioned initially polluted rainwater interception system has a drain pipe at the bottom of the rainwater monitoring well, and the rainwater monitoring well is connected to the front-end rainwater flow well through the drain pipe. The drain pipe is provided with an electric-controlled valve, which can drain the rainwater monitoring well after the rainwater is treated, so as to facilitate the next use.

[0015] The aforementioned initial polluted rainwater interception system also includes an electronic control device, which is electrically connected to the first electric gate, the second electric gate, the initial rainwater lifting device, the electronic control valve and the liquid level meter respectively, and the electronic control device realizes automatic control.

[0016] In the aforementioned initially polluted rainwater interception system, the first electric gate is arranged at the bottom of the front-end rainwater flow well, and the second electric gate is arranged at the top of the front-end rainwater flow well. When the collected rainwater is in the front-end rainwater flow well, there are more impurities at the bottom. The more seriously polluted early rainwater flows into the rainwater collection pool through the bottom of the front-end rainwater flow well, and the later rainwater with less pollutants flows into the later rainwater overflow well through the second electric gate in an overflow manner for subsequent utilization.

[0017] In the aforementioned initially polluted rainwater interception system, the downstream late rainwater pipe is an overflow pipe arranged at the upper part of the late rainwater overflow well, and the horizontal height of the water inlet of the downstream late rainwater pipe is lower than the horizontal height of the second electric gate.

[0018] In the aforementioned initial polluted rainwater interception system, a check valve and an electric ball valve are provided on the downstream initial rainwater pipe. The check valve prevents rainwater from flowing back, and the electric ball valve facilitates the control of the flow of the downstream initial rainwater pipe.

[0019] The aforementioned initial polluted rainwater interception system comprises at least two initial rainwater lifting devices, and both initial rainwater lifting devices are connected to the downstream initial rainwater pipe. The initial rainwater lifting device is a submersible pump. The initial rainwater lifting device adopts a one-for-one or multiple-for-multiple-reserve form, which can increase the lifting water flow when the amount of rainwater is large.

[0020] Compared with the prior art, the utility model separates initial rainwater from later rainwater, and the initial rainwater can be treated after separation, and the later rainwater can be utilized after separation. The amount of separated initial rainwater is small, and it can be treated alone or mixed with other sewage such as domestic sewage for treatment, which can effectively reduce the cost of rainwater treatment and prevent the pollution of the surface water environment by initial rainwater. The separated later rainwater has fewer pollutants and can be utilized, such as for flushing sites, irrigating farmland, etc., which can effectively utilize the later rainwater and not waste available water resources.

[0021] The utility model can monitor the rainfall in real time through the rainfall amount monitoring device, conveniently separate the initial rainwater and the later rainwater according to the rainfall amount, and automatically control through the electric control device to realize automatic operation, save manpower and material resources, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a plan view of the utility model;

[0023] Figure 2 yes Figure 1 Sectional view at Ⅰ-Ⅰ in the middle;

[0024] Figure 3 yes Figure 1 Sectional view at II-II;

[0025] Figure 4 yes Figure 1 Cross-sectional view at point III-III.

[0026] Figure markings: 1-upstream rainwater pipe, 2-front rainwater flow well, 3-rainwater collection pool, 4-late rainwater overflow well, 5-downstream initial rainwater pipe, 6-downstream late rainwater pipe, 7-first electric gate, 8-second electric gate, 9-initial rainwater lifting device, 10-electric control device, 11-rainwater volume monitoring device, 12-rainwater volume monitoring well, 13-emptying pipe, 14-electrically controlled valve, 15-liquid level meter.

[0027] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0028] Embodiment 1 of the present utility model: An initial polluted rainwater interception system, characterized in that it comprises:

[0029] An upstream rainwater pipe 1, the water inlet end of the upstream rainwater pipe 1 is connected to rainwater collection facilities such as a rainwater well and a drainage channel;

[0030] A rainwater front-end flow well 2, wherein the upstream rainwater pipe 1 is connected to the rainwater front-end flow well 2, and the collected rainwater enters the rainwater front-end flow well 2 through the upstream rainwater pipe 1;

[0031] A rainwater collection pool 3, wherein the rainwater collection pool 3 is connected to the rainwater front end flow well 2, and a first electric gate door 7 is provided between the rainwater collection pool 3 and the rainwater front end flow well 2. When the first electric gate door 7 is closed, the rainwater collection pool 3 is not connected to the rainwater front end flow well 2. When the first electric gate door 7 is opened, rainwater in the rainwater front end flow well 2 flows into the rainwater collection pool 3;

[0032] An initial rainwater lifting device 9 is provided in the rainwater collection pool 3. The initial rainwater lifting device 9 is connected to a downstream initial rainwater pipe 5. The initial rainwater lifting device 9 discharges the rainwater in the rainwater collection pool 3 through the downstream initial rainwater pipe 5. The initial rainwater lifting device 9 is a power device, and a water pump device such as a submersible pump, a diaphragm pump, and a plunger pump can be used. The outlet end of the downstream initial rainwater pipe 5 can be connected to a rainwater treatment device or other sewage treatment device to treat the initial rainwater separately, or to mix it with other sewage and then treat it uniformly;

[0033] A late rainwater overflow well 4, wherein the late rainwater overflow well 4 is connected to the rainwater front-end flow well 2, and a second electric gate door 8 is provided between the late rainwater overflow well 4 and the rainwater front-end flow well 2. When the second electric gate door 8 is opened, rainwater in the rainwater front-end flow well 2 flows into the late rainwater overflow well 4;

[0034] The downstream late rainwater pipe 6 is connected to the late rainwater overflow well 4. The outlet end of the downstream late rainwater pipe 6 can be connected to a late rainwater utilization device or other water treatment equipment. The late rainwater in the late rainwater overflow well 4 can flow out through the downstream late rainwater pipe 6 and be utilized.

[0035] Embodiment 2 of the present utility model: An initial polluted rainwater interception system, characterized in that it comprises: an upstream rainwater pipe 1, the water inlet end of the upstream rainwater pipe 1 is connected to rainwater collection facilities such as rainwater sewers and drainage channels; a rainwater front-end flow well 2, the upstream rainwater pipe 1 is connected to the rainwater front-end flow well 2, and the collected rainwater enters the rainwater front-end flow well 2 through the upstream rainwater pipe 1; a rainwater collecting pool 3, the rainwater collecting pool 3 is connected to the rainwater front-end flow well 2, and a first electric gate 7 is arranged between the rainwater collecting pool 3 and the rainwater front-end flow well 2, the first electric gate 7 is closed, the rainwater collecting pool 3 is not connected to the rainwater front-end flow well 2, the first electric gate 7 is opened, and the rainwater in the rainwater front-end flow well 2 flows into the rainwater collecting pool 3; an initial rainwater lifting device 9, the initial rainwater lifting device 9 is arranged in the rainwater collecting pool 3, the initial rainwater lifting device 9 is connected to the downstream initial rainwater pipe 5, and the initial rainwater lifting device 9 collects rainwater The rainwater in the collecting pool 3 is discharged through the downstream initial rainwater pipe 5. The initial rainwater lifting device 9 is a power device, which can adopt water pump equipment such as a submersible pump, a diaphragm pump, and a plunger pump. The outlet end of the downstream initial rainwater pipe 5 can be connected to rainwater treatment equipment or other sewage treatment equipment to treat the initial rainwater separately, or mix it with other sewage and then treat it uniformly; the later rainwater overflow well 4, the later rainwater overflow well 4 is connected to the rainwater front-end flow well 2, and a second electric gate door 8 is arranged between the later rainwater overflow well 4 and the rainwater front-end flow well 2. When the second electric gate door 8 is opened, the rainwater in the rainwater front-end flow well 2 flows into the later rainwater overflow well 4; the downstream later rainwater pipe 6, the downstream later rainwater pipe 6 is connected to the later rainwater overflow well 4, the outlet end of the downstream later rainwater pipe 6 can be connected to the later rainwater utilization equipment, or other water treatment equipment, and the later rainwater in the later rainwater overflow well 4 can flow out through the downstream later rainwater pipe 6 and be utilized.

[0036] Among them, the front-end rainwater flow well 2, the rainwater collection pool 3 and the later rainwater overflow well 4 can be constructed by reinforced concrete structure construction, metal plate welding box and the like. The front-end rainwater flow well 2 and the initial rainwater collection pool 3 share a water hole at the bottom of the partition wall, and a first electric gate door 7 is arranged at the position of the water hole. The front-end rainwater flow well 2 and the later rainwater overflow well 4 share a water hole at the top of the partition wall, and a second electric gate door 8 is arranged at the position of the water hole.

[0037] It also includes a rainwater volume monitoring device 11. The rainwater volume monitoring device 11 is installed at a position according to actual use and is used to monitor real-time rainfall. The rainwater volume monitoring device 11 includes a rainwater volume monitoring well 12. A liquid level meter 15 is arranged in the rainwater volume monitoring well 12. The liquid level meter 15 can adopt a float liquid level meter, an ultrasonic liquid level meter, an infrared liquid level meter and other equipment that can monitor the liquid level height. The real-time rainfall in the rainwater collection area can be calculated according to the liquid level height read by the liquid level meter 15 and the wellhead area of ​​the rainwater volume monitoring well 12. An emptying pipe 13 is arranged at the bottom of the rainwater volume monitoring well 12. The emptying pipe 13 is used to empty the rainwater volume monitoring well 12. The rainwater volume monitoring well 12 is connected to the rainwater front-end flow well 2 through the emptying pipe 13. The emptying pipe 13 is provided with an electric control valve 14.

[0038] It also includes an electric control device 10 , which is electrically connected to the first electric gate 7 , the second electric gate 8 , the initial rainwater lifting device 9 , the electric control valve 14 and the liquid level meter 15 .

[0039] The electronic control device 10 is used for overall automatic control, and can perform real-time control according to the real-time rainfall monitored by the rainwater monitoring device 11. During normal time, the electronic control device 10 controls the first electric gate 7 and the second electric gate 8 to be in a closed state. The real-time rainfall is calculated according to the data of the rainwater monitoring device 11 for the first electric gate 7 and the second electric gate 8. When it rains, when the overall rainfall reaches a preset initial value, the first electric gate 7 is controlled to open and the initial rainwater is processed. When the overall rainfall reaches a preset later period value, the first electric gate 7 is controlled to close and the second electric gate 8 is opened to process the later rainfall. After the rainfall stops, the electronic control valve 14 is controlled to open, so that the rainwater monitoring well 12 can be drained after the rainwater is processed, which is convenient for the next use. The rainwater in the rainwater monitoring well 12 is discharged and processed together with the initial rainwater.

[0040] Embodiment 3 of the present utility model: an initial polluted rainwater interception system, characterized in that it comprises: an upstream rainwater pipe 1, the water inlet end of the upstream rainwater pipe 1 is connected to rainwater collection facilities such as rainwater sewers and drainage channels; a rainwater front-end flow well 2, the upstream rainwater pipe 1 is connected to the rainwater front-end flow well 2, and the collected rainwater enters the rainwater front-end flow well 2 through the upstream rainwater pipe 1; a rainwater collecting pool 3, the rainwater collecting pool 3 is connected to the rainwater front-end flow well 2, and a first electric gate 7 is arranged between the rainwater collecting pool 3 and the rainwater front-end flow well 2, the first electric gate 7 is closed, the rainwater collecting pool 3 is not connected to the rainwater front-end flow well 2, the first electric gate 7 is opened, and the rainwater in the rainwater front-end flow well 2 flows into the rainwater collecting pool 3; an initial rainwater lifting device 9, the initial rainwater lifting device 9 is arranged in the rainwater collecting pool 3, the initial rainwater lifting device 9 is connected to the downstream initial rainwater pipe 5, and the initial rainwater lifting device 9 collects rainwater The rainwater in the collecting pool 3 is discharged through the downstream initial rainwater pipe 5. The initial rainwater lifting device 9 is a power device, which can adopt water pump equipment such as a submersible pump, a diaphragm pump, and a plunger pump. The outlet end of the downstream initial rainwater pipe 5 can be connected to rainwater treatment equipment or other sewage treatment equipment to treat the initial rainwater separately, or mix it with other sewage and then treat it uniformly; the later rainwater overflow well 4, the later rainwater overflow well 4 is connected to the rainwater front-end flow well 2, and a second electric gate door 8 is arranged between the later rainwater overflow well 4 and the rainwater front-end flow well 2. When the second electric gate door 8 is opened, the rainwater in the rainwater front-end flow well 2 flows into the later rainwater overflow well 4; the downstream later rainwater pipe 6, the downstream later rainwater pipe 6 is connected to the later rainwater overflow well 4, the outlet end of the downstream later rainwater pipe 6 can be connected to the later rainwater utilization equipment, or other water treatment equipment, and the later rainwater in the later rainwater overflow well 4 can flow out through the downstream later rainwater pipe 6 and be utilized.

[0041] The first electric gate door 7 is arranged at the bottom of the front-end rainwater flow well 2, and the second electric gate door 8 is arranged at the top of the front-end rainwater flow well 2. When the collected rainwater is in the front-end rainwater flow well 2, there are more impurities at the bottom. The seriously polluted early rainwater flows into the rainwater collecting pool 3 through the bottom of the front-end rainwater flow well 2, and the late rainwater with less pollutants flows into the late rainwater overflow well 4 through the second electric gate door 8 in an overflow manner, which is convenient for the utilization of the late rainwater.

[0042] Embodiment 4 of the present utility model: an initial polluted rainwater interception system, characterized in that it comprises: an upstream rainwater pipe 1, the water inlet end of the upstream rainwater pipe 1 is connected to rainwater collection facilities such as rainwater sewers and drainage channels; a rainwater front-end flow well 2, the upstream rainwater pipe 1 is connected to the rainwater front-end flow well 2, and the collected rainwater enters the rainwater front-end flow well 2 through the upstream rainwater pipe 1; a rainwater collecting pool 3, the rainwater collecting pool 3 is connected to the rainwater front-end flow well 2, and a first electric gate 7 is arranged between the rainwater collecting pool 3 and the rainwater front-end flow well 2, the first electric gate 7 is closed, the rainwater collecting pool 3 is not connected to the rainwater front-end flow well 2, the first electric gate 7 is opened, and the rainwater in the rainwater front-end flow well 2 flows into the rainwater collecting pool 3; an initial rainwater lifting device 9, the initial rainwater lifting device 9 is arranged in the rainwater collecting pool 3, the initial rainwater lifting device 9 is connected to the downstream initial rainwater pipe 5, and the initial rainwater lifting device 9 collects rainwater The rainwater in the collecting pool 3 is discharged through the downstream initial rainwater pipe 5. The initial rainwater lifting device 9 is a power device, which can adopt water pump equipment such as a submersible pump, a diaphragm pump, and a plunger pump. The outlet end of the downstream initial rainwater pipe 5 can be connected to rainwater treatment equipment or other sewage treatment equipment to treat the initial rainwater separately, or mix it with other sewage and then treat it uniformly; the later rainwater overflow well 4, the later rainwater overflow well 4 is connected to the rainwater front-end flow well 2, and a second electric gate door 8 is arranged between the later rainwater overflow well 4 and the rainwater front-end flow well 2. When the second electric gate door 8 is opened, the rainwater in the rainwater front-end flow well 2 flows into the later rainwater overflow well 4; the downstream later rainwater pipe 6, the downstream later rainwater pipe 6 is connected to the later rainwater overflow well 4, the outlet end of the downstream later rainwater pipe 6 can be connected to the later rainwater utilization equipment, or other water treatment equipment, and the later rainwater in the later rainwater overflow well 4 can flow out through the downstream later rainwater pipe 6 and be utilized.

[0043] At least two initial rainwater lifting devices 9 are provided, and the initial rainwater lifting devices 9 are connected to the downstream initial rainwater pipe 5. The initial rainwater lifting devices 9 are submersible pumps. The initial rainwater lifting devices can be used in the form of one for use and one for backup, multiple for use and one for backup, multiple for use and multiple for backup, etc., to prevent equipment damage from causing the entire system to stop running, and when the amount of rainwater is large, the number of initial rainwater lifting devices 9 working can be increased to improve the rainwater processing flow rate.

[0044] Specifically, the downstream late rainwater pipe 6 is an overflow pipe arranged on the upper part of the late rainwater overflow well 4, and the horizontal height of the water inlet of the downstream late rainwater pipe 6 is lower than the horizontal height of the second electric gate 8.

[0045] Specifically, the downstream initial rainwater pipe 5 is provided with a check valve and an electric ball valve.

[0046] The working principle of an embodiment of the utility model: when the utility model is in use, rainwater collected by rainwater collection facilities such as rainwater sewers and drainage channels enters the rainwater front-end flow well 2 through the upstream rainwater pipe 1. The rainwater front-end flow well 2 temporarily stores the collected rainwater. At the same time, the rainwater amount monitoring device 11 monitors the occurrence of rainfall through the change of liquid level; when the overall rainfall reaches the preset initial value, the electric control device 10 controls the first electric gate 7 to open, and the rainwater in the rainwater front-end flow well 2 flows into the rainwater collection pool 3. The initial rainwater lifting device 9 discharges the rainwater in the rainwater collection pool 3 through the downstream initial rainwater pipe 5. The outlet end of the downstream initial rainwater pipe 5 can be connected to rainwater treatment equipment or other sewage treatment equipment to treat the initial rainwater. It can be treated separately or mixed with other sewage and then treated uniformly; when the overall rainfall reaches the preset late period value, the electronic control device 10 controls the first electric gate 7 to close, and the second electric gate 8 to open, and the rainwater in the front-end flow well 2 of the rainwater flows into the late rainwater overflow well 4. The late rainwater in the late rainwater overflow well 4 can flow out through the downstream late rainwater pipe 6. The outlet end of the downstream late rainwater pipe 6 can be connected to the late rainwater utilization equipment, or other water treatment equipment, to utilize the late rainwater; when the rainfall stops, after the rainwater is treated, the electronic control device 10 controls the electronic control valve 14 to open, and the rainwater volume monitoring well 12 is emptied to facilitate the next use. The rainwater discharged from the rainwater volume monitoring well 12 is treated together with the initial rainwater.

Claims

1. An initial polluted rainwater interception system, characterized in that: include: Upstream stormwater pipe (1); A rainwater front end flow well (2), wherein the upstream rainwater pipe (1) is connected to the rainwater front end flow well (2); A rainwater collection pool (3), wherein the rainwater collection pool (3) is connected to the rainwater front end flow well (2), and a first electric gate (7) is provided between the rainwater collection pool (3) and the rainwater front end flow well (2); An initial rainwater lifting device (9), the initial rainwater lifting device (9) being arranged in the rainwater collection pool (3), the initial rainwater lifting device (9) being connected to a downstream initial rainwater pipeline (5); A late rainwater overflow well (4), wherein the late rainwater overflow well (4) is connected to the rainwater front-end flow well (2), and a second electric gate (8) is provided between the late rainwater overflow well (4) and the rainwater front-end flow well (2); A downstream late rainwater pipe (6), wherein the downstream late rainwater pipe (6) is connected to the late rainwater overflow well (4).

2. The initial polluted rainwater interception system according to claim 1, characterized in that: It also includes a rainwater volume monitoring device (11), wherein the rainwater volume monitoring device (11) includes a rainwater volume monitoring well (12), and a liquid level meter (15) is arranged in the rainwater volume monitoring well (12).

3. The initial polluted rainwater interception system according to claim 2, characterized in that: A drain pipe (13) is provided at the bottom of the rainwater monitoring well (12); the rainwater monitoring well (12) is connected to the rainwater front-end flow well (2) via the drain pipe (13); and an electric control valve (14) is provided on the drain pipe (13).

4. The initial polluted rainwater interception system according to claim 3, characterized in that: It also includes an electric control device (10), which is electrically connected to the first electric gate (7), the second electric gate (8), the initial rainwater lifting device (9), the electric control valve (14) and the liquid level meter (15).

5. The initial polluted rainwater interception system according to claim 1, characterized in that: The first electric gate door (7) is arranged at the bottom of the rainwater front end flow well (2), and the second electric gate door (8) is arranged at the top of the rainwater front end flow well (2).

6. The initial polluted rainwater interception system according to claim 1, characterized in that: The downstream late rainwater pipe (6) is an overflow pipe arranged at the upper part of the late rainwater overflow well (4), and the level of the water inlet of the downstream late rainwater pipe (6) is lower than the level of the second electric gate (8).

7. The initial polluted rainwater interception system according to claim 1, characterized in that: The downstream initial rainwater pipe (5) is provided with a check valve and an electric ball valve.

8. The initial polluted rainwater interception system according to claim 1, characterized in that: At least two initial rainwater lifting devices (9) are provided, and both initial rainwater lifting devices (9) are connected to the downstream initial rainwater pipeline (5). The initial rainwater lifting devices (9) are submersible pumps.

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