A municipal intelligent pipe network drainage system and its operation method

Abstract

A municipal intelligent pipe network drainage system and its operation method, including a well main body. A diversion plate is detachably installed at the top port of the well main body. A screw rod is fixedly connected to the bottom of the diversion plate. A plurality of diversion grooves are arranged in a circular array centered on the screw rod on the diversion plate, and the diversion grooves are inclined. Inside the well main body, a diversion outer shell is installed on the lower side of the diversion plate. A limiting ring is arranged at the center of the bottom of the diversion outer shell. The diversion outer shell is rotationally connected with the screw rod through the limiting ring. Diversion holes are arranged on the diversion outer shell, and a plurality of diversion strips are arranged inside the diversion outer shell. A plurality of extended water grooves are also arranged in a circular array centered on the screw rod on the diversion plate. In case of heavy rain or extremely heavy rain, it can improve the drainage throughput of the rain well and reduce the occurrence of urban waterlogging.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal intelligent pipe networks, and in particular to a municipal intelligent pipe network drainage system and its operation method. Background Art

[0002] A municipal road rainwater well refers to a facility used to collect and discharge rainwater on the road. It is usually installed under the road edge or the central isolation belt to collect the rainwater flowing down from the road surface during rainfall. The rainwater enters the underground drainage system or natural water body through the rainwater well to reduce road waterlogging and keep traffic smooth. These rainwater wells are generally covered with manhole covers for maintenance and cleaning work. They play an important role in maintaining road safety and preventing waterlogging.

[0003] Currently, with the industrialization process and urban development, ground pollution has intensified, and the situation of rainwater runoff pollution is severe. In particular, the pollutant concentration in the initial stage of rainfall is even much higher than that of general urban domestic sewage. Therefore, it is very necessary to effectively collect and treat the rainwater in the initial stage of rainfall to improve the water quality of rivers and lakes. In some counties in our country, due to their long construction years, rainwater and sewage diversion has not been fully implemented within the county, and the original rainwater and sewage combined drainage situation remains. Due to the large investment in municipal pipe networks, considering the construction cost, some counties only intercept at the end of the rainwater and sewage combined drainage pipe orifice and transport the intercepted sewage to the sewage treatment plant for treatment.

[0004] At the same time, the current rainwater wells cannot carry out emergency drainage when encountering heavy rain or extremely heavy rain. That is to say, the drainage volume of the current rainwater wells is fixed at the initial design. When encountering heavy rain or extremely heavy rain, it is easy to have poor drainage and cause urban waterlogging. Summary of the Invention

[0005] To solve the current technical problems, the main purpose of the present invention is to provide a municipal intelligent pipe network drainage system and operation method, which can improve the drainage throughput of rainwater wells and reduce the occurrence of urban waterlogging when encountering heavy rain or extremely heavy rain.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a municipal intelligent pipe network drainage system, including a well main body, a diversion plate is detachably installed at the top port of the well main body, a spiral rod is fixedly connected to the bottom of the diversion plate, and a plurality of diversion grooves are arranged in a circular array around the spiral rod on the diversion plate, and the diversion grooves are inclined; a diversion housing is installed below the diversion plate inside the well main body, a limiting ring is arranged at the center of the bottom of the diversion housing, the diversion housing is rotationally connected with the spiral rod through the limiting ring, diversion holes are arranged on the diversion housing, and a plurality of diversion strips are arranged inside the diversion housing;

[0007] A plurality of extended water troughs are also arranged in a circular array centered on the spiral rod on the deflector. Steps are arranged in the extended water troughs, and baffles are installed on the steps. One end of the baffle away from the spiral rod is pivotally hinged to the deflector. A lever is arranged on the lower side of the deflector below the extended water trough. One end of the lever is pivotally hinged to the deflector, and the other end extends radially toward the side away from the spiral rod. A push seat is arranged on the lever on the side close to the spiral rod.

[0008] A sewage outlet and a rainwater outlet are arranged on the main body of the water well. The rainwater outlet is located above the sewage outlet; when the diversion housing is at the lower end of the spiral rod, the diversion housing closes the rainwater outlet.

[0009] A support ring is arranged in the main body of the water well below the rainwater outlet and is used to support the diversion housing when the diversion housing is at the lower end of the spiral rod.

[0010] A ventilation port is also arranged on the main body of the water well, and one end of the ventilation port away from the main body of the water well is connected to a ventilation pipe.

[0011] An upper support ring is installed at the top of the main body of the water well, and the deflector is installed in the upper support ring.

[0012] A notch is arranged on the inner ring of the upper support ring, and a plurality of connecting blocks are arranged on the outer circumference of the deflector. The connecting blocks are placed into the notch of the upper support ring from top to bottom, thereby limiting the deflector and the upper support ring.

[0013] The connecting block is in the shape of a U-shaped groove, and a mechanical return block is hinged in the connecting block. Both the connecting block and the mechanical return block are located in the notch of the upper support ring.

[0014] A water level sensor and a water flow sensor are installed in the main body of the water well. A sewage conduit and a rainwater conduit are respectively installed on the sewage outlet and the rainwater outlet, and automatic valves are respectively installed on the sewage conduit and the rainwater conduit.

[0015] A filtering device is installed at the sewage outlet in the main body of the water well.

[0016] Using the operation method of the described municipal intelligent pipe network drainage system, the operation method includes the following steps:

[0017] S1. Light rain or initial rainwater normally flows into the main body of the water well through the diversion trough, flows to the bottom end of the main body of the water well by gravity, and the rainwater is discharged from the sewage outlet.

[0018] S2. When the flow rate of the rainwater flowing into the main body of the water well through the diversion trough becomes larger, the water flow forms an oblique vortex water flow under the guidance of the diversion trough, thereby scouring the diversion strips on the diversion housing. The diversion housing rises along the spiral rod under the reaction force, and at this time, the rainwater outlet is opened.

[0019] S3. When the diversion housing moves upward and the edge of the diversion housing gradually abuts against the lever, the lever swings upward, thereby pushing up the baffle through the push seat to increase the water flow throughput.

[0020] S4. At this time, the water flow sensor detects an increase in water flow and controls the automatic valve on the sewage conduit to close through the controller. At this time, the subsequent rainwater is discharged from the rainwater inlet to the river. Among them, if the water level in the well body continues to rise and exceeds the threshold of the water level sensor for a certain period of time, the water level sensor controls the opening of the automatic valve on the sewage conduit through the controller for emergency drainage.

[0021] The present invention has the following beneficial effects:

[0022] 1. The diversion groove of the present invention is inclined. When small-flow rainwater passes through the diversion groove, the rainwater directly flows into the well body. When large-flow water passes through the diversion groove, the water flow is guided by the diversion groove to form an oblique vortex water flow, thereby flushing the diversion strips on the diversion housing. The diversion strips have a certain height, thereby pushing the diversion housing to move the diversion housing upward along the spiral rod. When the water flow decreases, the power provided by the water flow is not sufficient to push the diversion housing, and the diversion housing moves downward by itself. When the diversion housing moves upward and the edge of the diversion housing gradually abuts against the lever, the lever swings upward, and the baffle is pushed up through the push seat, so that the rainwater enters the well body from the extended water tank, thereby increasing the water flow throughput.

[0023] 2. When the present invention is in use, small-flow and early-stage rainwater is discharged from the sewage outlet due to relatively large pollution. When large-flow rainwater comes, the diversion housing moves upward to open the rainwater inlet, and the water level in the well body rises. The sewage outlet and the rainwater inlet can drain water simultaneously, facilitating the discharge of large-flow water, thereby reducing the possibility of urban waterlogging.

[0024] 3. When the system of the present invention is draining water normally, the opening and closing of the automatic valve are controlled by the water level sensor and the water flow sensor, facilitating rainwater and sewage diversion drainage and emergency flood control drainage. When water backflows occur, the water flow direction is detected by the water flow sensor, and the water level in the well body is detected by the water level sensor. If the water flow sensor detects that the water flow direction is reversed and the water level sensor detects that the water level continues to rise, the automatic valve is closed. Description of the Drawings

[0025] The following further illustrates the present invention in conjunction with the drawings and embodiments.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the connection structure between the diversion plate and the diversion outside of the present invention.

[0028] Figure 3This is a schematic diagram of the equipment disassembly structure in the present invention.

[0029] Figure 4 This is a schematic diagram of the equipment disassembly structure from another perspective in the present invention.

[0030] Figure 5 This is a schematic diagram of the diversion structure in the present invention.

[0031] Figure 6 This is a schematic diagram of another perspective of the diversion structure in the present invention.

[0032] Figure 7 This is a schematic cross-sectional structure diagram of the extended water tank on the diversion plate in the present invention.

[0033] In the figure:

[0034] Water well main body 1, diversion plate 2, diversion groove 3, extended water tank 4, screw rod 5, limit ring 6, diversion strip 7, shunt housing 8, support ring 9, diversion hole 10, connection block 11, mechanical return block 12, mounting ring 13, sewage outlet 14, rainwater inlet 15, automatic valve 16, rainwater conduit 17, sewage conduit 18, filtration device 19, ventilation port 20, ventilation pipe 21, water level sensor 22, water flow sensor 23, baffle 24, lever 25, push seat 26, rain-sewage combined flow pipe orifice 27. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application.

[0036] Embodiment 1:

[0037] Refer to Figures 1-7 As shown, a municipal intelligent pipe network drainage system includes a water well main body 1. A diversion plate 2 is detachably installed at the top port of the water well main body 1. A screw rod 5 is fixedly connected to the bottom of the diversion plate 2. A plurality of diversion grooves 3 are arranged in a circular array centered on the screw rod 5 on the diversion plate 2, and the diversion grooves 3 are inclined; inside the water well main body 1, a shunt housing 8 is installed below the diversion plate 2. A limit ring 6 is provided at the center of the bottom of the shunt housing 8. The shunt housing 8 is rotationally connected with the screw rod 5 through the limit ring 6. Diversion holes 10 are provided on the shunt housing 8, and a plurality of diversion strips 7 are arranged inside the shunt housing 8. Since the diversion grooves 3 are inclined, when small-flow rainwater passes through the diversion grooves 3, the rainwater directly flows into the water well main body 1. When large-flow water passes through the diversion grooves 3, the water flow is guided by the diversion grooves 3 to form an oblique vortex water flow, thereby flushing the diversion strips 7 on the shunt housing 8. The diversion strips 7 have a certain height, thereby pushing the shunt housing 8 to move the shunt housing 8 upward along the screw rod 5; when the water flow decreases, the power provided by the water flow is not sufficient to push the shunt housing 8, and the shunt housing 8 will move downward and fall back by itself.

[0038] On the flow deflector 2, a plurality of extended water tanks 4 are also arranged in a circular array centered on the screw rod 5. Steps are provided in the extended water tanks 4, and baffles 24 are installed on the steps. One end of the baffle 24 away from the screw rod 5 is pivotally hinged to the flow deflector 2. A lever 25 is provided on the lower side of the flow deflector 2 below the extended water tank 4. One end of the lever 25 is pivotally hinged to the flow deflector 2, and the other end extends radially away from the screw rod 5. A push seat 26 is provided on the lever 25 on the side close to the screw rod 5. When the shunt housing 8 moves upward and the edge of the shunt housing 8 gradually abuts against the lever 25, the lever 25 swings upward, and the baffle 24 is pushed up by the push seat 26, so that rainwater enters the well main body 1 from the extended water tank 4, thereby increasing the water flow throughput.

[0039] See Figures 1-4 , a sewage outlet 14 and a rainwater outlet 15 are provided on the well main body 1, and the rainwater outlet 15 is located above the sewage outlet 14; when the shunt housing 8 is at the lower end of the screw rod 5, the shunt housing 8 closes the rainwater outlet 15. By providing the sewage outlet 14 and the rainwater outlet 15, the rainwater flowing into the well main body 1 can be shunted. The small-flow and early-stage rainwater is discharged from the sewage outlet 14 due to relatively large pollution. When a large amount of rainwater comes, the shunt housing 8 moves upward to open the rainwater outlet 15, and the water level in the well main body 1 rises. The sewage outlet 14 and the rainwater outlet 15 can drain water simultaneously, facilitating the discharge of a large amount of water, thereby reducing the possibility of urban waterlogging. And when the shunt housing 8 is at the lower end of the screw rod 5, the shunt housing 8 closes the rainwater outlet 15. Since the sewage outlet 14 is connected to the sewage treatment plant and the rainwater outlet 15 is connected to the river, when the river water rises, the shunt housing 8 blocks the rainwater outlet 15, which can also prevent river water backflow.

[0040] Specifically, the lower end of the shunt housing 8 is in the shape of a frustum of a cone with a large top and a small bottom, and the upper end is in a circular ring shape. The rainwater outlet 15 is blocked by the outer wall of the circular ring.

[0041] See Figure 3 、 4 , a support ring 9 is provided in the well main body 1, and the support ring 9 is located below the rainwater outlet 15. When the shunt housing 8 is at the lower end of the screw rod 5, it is used to support the shunt housing 8. The shunt housing 8 is supported by the support ring 9, so that the shunt housing 8 and the screw rod 5 are evenly stressed, thereby ensuring the flexibility of the connection between the shunt housing 8 and the screw rod 5.

[0042] See Figure 3 、 4 , a vent hole 20 is also provided on the well main body 1, and one end of the vent hole 20 away from the well main body 1 is connected to a ventilation pipe 21. The vent hole 20 vents the well main body 1 to ensure the stability of the internal air pressure of the well main body 1, facilitate the formation of water flow, and improve the drainage efficiency.

[0043] See Figures 1-4 , an installation ring 13 is installed at the top of the water well main body 1, and the diversion plate 2 is installed in the installation ring 13. It is convenient to install the diversion plate 2 through the installation ring 13.

[0044] Furthermore, see Figure 1 , a notch is provided on the inner ring of the installation ring 13, and a plurality of connecting blocks 11 are provided on the outer circumference of the diversion plate 2. The connecting blocks 11 are placed into the notch of the installation ring 13 from top to bottom, so as to limit the diversion plate 2 and the installation ring 13. By providing the connecting blocks 11 on the outer circumference of the diversion plate 2, it is convenient to limit the diversion plate 2 and make the diversion plate 2 detachable. When disassembling, lift the diversion plate 2, and the connecting blocks 11 can be taken out from the notch of the installation ring 13.

[0045] Even further, in order to facilitate lifting the diversion plate 2, see Figure 1 、 6 , the connecting block 11 is in the shape of a U-shaped groove, and a mechanical return block 12 is hinged inside the connecting block 11. Both the connecting block 11 and the mechanical return block 12 are located in the notch of the installation ring 13. When in use, rotate the mechanical return block 12, and the mechanical return block 12 extends, so as to lift the diversion plate 2 through the mechanical return block 12. It is convenient to maintain the internal structure.

[0046] See Figure 3 、 4 , a water level sensor 22 and a water flow sensor 23 are installed in the water well main body 1, a sewage conduit 18 and a rainwater conduit 17 are respectively installed on the sewage outlet 14 and the rainwater outlet 15, and an automatic valve 16 is respectively installed on the sewage conduit 18 and the rainwater conduit 17. It is convenient to control the sewage conduit 18 and the rainwater conduit 17 through the controller.

[0047] When draining water normally, control the opening and closing of the automatic valve 16 through the water level sensor 22 and the water flow sensor 23, which is convenient for rainwater and sewage separated drainage and emergency flood control drainage.

[0048] When water backflows occur, detect the water flow direction through the water flow sensor 23, detect the water level in the water well main body 1 through the water level sensor 22. If the water flow direction detected by the water flow sensor 23 is reversed and the water level sensor 22 detects that the water level continues to rise, close the automatic valve 16.

[0049] See Figure 3 、 4 , a filtering device 19 is installed at the sewage outlet 14 in the water well main body 1. It is used to filter the sewage discharged from the sewage outlet 14.

[0050] And when it does not rain in the area, but a relatively high water level is detected in the well body 1 by the water level sensor 22, and it is detected by the water flow sensor 23 that the water in the well body 1 does not flow or flows very slowly, it can be judged that the filtering device 19 is blocked, so that the filtering device 19 can be maintained and cleaned in time.

[0051] Embodiment 2:

[0052] See Figure 2 , a rain and sewage combined flow pipe orifice 27 for inflowing sewage is further arranged on the well body 1. On sunny days, the rain and sewage combined flow pipe orifice 27 contains pure sewage, which enters the sewage pipe 18 through the sewage outlet 14 and is then discharged into the sewage treatment plant. After being treated up to standard by the sewage treatment plant, it is discharged into the river. In rainy weather, part of the rainwater is mixed in the rain and sewage combined flow pipe orifice 27. In the initial stage of rainfall, since the diversion trough 3 is inclined, when the initial rainwater with more pollutants passes through the diversion trough 3, the rainwater directly flows into the well body 1. The initial rainwater volume is small, and the combined flow pipe is still mainly sewage. The combined flow water in the rain and sewage combined flow pipe orifice 27 flows to the bottom end of the well body by gravity and is discharged into the sewage treatment plant from the sewage outlet 14. In the middle stage of rainfall, the rainfall increases, and a large amount of rainwater is mixed in the rain and sewage combined flow pipe orifice 27, mainly rainwater. And when a large amount of water flows through the diversion trough 3, the water flow forms an oblique vortex water flow under the guidance of the diversion trough 3, thereby scouring the diversion strips 7 on the diversion outer shell 8. The diversion strips 7 have a certain height, so as to push the diversion outer shell 8 and make the diversion outer shell 8 rise along the screw rod 5. At this time, the rainwater outlet 15 is opened, and at the same time, the water flow sensor 23 detects that the water flow becomes larger, and the automatic valve 16 on the sewage pipe 18 is controlled to close through the controller. At this time, the combined flow water and rainwater in the rain and sewage combined flow pipe orifice 27 are discharged into the river through the rainwater outlet 15. When the diversion outer shell 8 continues to move upward in heavy rain weather, the edge of the diversion outer shell 8 gradually abuts against the lever 25, and the lever 25 swings upward, so as to push up the baffle 24 through the push seat 26, increasing the water flow throughput and enabling more water to enter the rainwater pipe 15. If the water level in the well body 1 still continues to rise and exceeds the threshold value of the water level sensor 22 for a period of time, the water level sensor 22 controls the opening of the automatic valve 16 on the sewage pipe 18 through the controller for emergency drainage through the rainwater outlet 15 and the sewage outlet 16; in the later stage of rainfall, the decrease in rainfall leads to insufficient power provided by the water flow to push the diversion outer shell 8, and the diversion outer shell 8 moves downward and falls back by itself. At this time, the rainwater outlet 15 is closed. In the later stage, the rainfall decreases, and the combined flow pipe is mainly sewage. The rain and sewage combined flow pipe orifice 27 is discharged into the sewage treatment plant through the sewage outlet 14.

[0053] Embodiment 3:

[0054] Adopt an operation method of a municipal intelligent pipe network drainage system, and the operation method includes the following steps:

[0055] Light rain or initial rainwater normally flows into the well main body 1 through the diversion trough 3, flows to the bottom end of the well main body 1 by gravity, and the rainwater is discharged from the sewage outlet 14.

[0056] When the flow rate of the rainwater flowing into the well main body 1 through the diversion trough 3 increases, the water flow is guided by the diversion trough 3 to form an oblique vortex water flow, thereby scouring the diversion strip 7 on the diversion outer shell 8. The diversion outer shell 8 rises along the screw rod 5 under the reaction force, and at this time the rainwater inlet 15 is opened.

[0057] When the diversion outer shell 8 moves upward, the edge of the diversion outer shell 8 gradually abuts against the lever 25, and the lever 25 swings upward, thereby jacking up the baffle 24 through the push seat 26 to increase the water flow throughput.

[0058] At this time, the water flow sensor 23 detects that the water flow increases, and controls the automatic valve 16 on the sewage conduit 18 to close through the controller. At this time, the later rainwater is discharged from the rainwater inlet 15 to the river; among them, if the water level in the well main body 1 continues to rise and exceeds the threshold value of the water level sensor 22 for a period of time, the water level sensor 22 controls the automatic valve 16 on the sewage conduit 18 to open through the controller for emergency drainage.

[0059] When water backflows occur, the water flow direction is detected by the water flow sensor 23, and the water level in the well main body 1 is detected by the water level sensor 22. If the water flow sensor 23 detects that the water flow direction is reversed and the water level sensor 22 detects that the water level continues to rise, the two automatic valves 16 are closed.

Claims

1. A municipal intelligent pipe network drainage system, comprising a water well body (1), characterized in that: A guide plate (2) is detachably mounted on the top port of the water well body (1), a spiral rod (5) is fixedly connected to the bottom of the guide plate (2), a plurality of guide grooves (3) are arranged in a circular array with the spiral rod (5) as the center on the guide plate (2), and the guide grooves (3) are inclined; a flow diversion shell (8) is mounted inside the water well body (1) at the lower side of the guide plate (2), a limit ring (6) is arranged at the bottom center of the flow diversion shell (8), the flow diversion shell (8) is screwed to the spiral rod (5) through the limit ring (6), a flow diversion hole (10) is arranged on the flow diversion shell (8), and a plurality of guide strips (7) are arranged inside the flow diversion shell (8); The guide plate (2) is provided with a plurality of expansion grooves (4) in a circular array with the spiral rod (5) as the center, a step is provided in the expansion groove (4), a baffle (24) is mounted on the step, one end of the baffle (24) away from the spiral rod (5) is hinged to the guide plate (2), a lever (25) is provided on the lower side of the guide plate (2) below the expansion groove (4), one end of the lever (25) is hinged to the guide plate (2), and the other end extends radially toward a side away from the spiral rod (5), and a push seat (26) is provided on the lever (25) on a side close to the spiral rod (5); The water well body (1) is provided with a sewage outlet (14) and a rainwater outlet (15), and the rainwater outlet (15) is located on the upper side of the sewage outlet (14); when the flow diversion shell (8) is located at the lower end of the spiral rod (5), the flow diversion shell (8) closes the rainwater outlet (15).

2. A municipal intelligent pipe network drainage system according to claim 1, characterized in that: A support ring (9) is provided in the water well body (1). The support ring (9) is located at the lower side of the rainwater outlet (15) and is used to support the flow diversion housing (8) when the flow diversion housing (8) is located at the lower end of the spiral rod (5).

3. According to claim 1, a municipal intelligent pipe network drainage system is characterized by: The water well body (1) is also provided with a vent (20), and one end of the vent (20) away from the water well body (1) is connected to a vent pipe (21).

4. According to claim 1, a municipal intelligent pipe network drainage system is characterized by: A mounting ring (13) is installed on the top of the water well body (1), and the guide plate (2) is installed in the mounting ring (13).

5. A municipal intelligent pipe network drainage system according to claim 4, characterized in that: The inner circle of the mounting ring (13) is provided with a notch, and the outer circumference of the guide plate (2) is provided with a plurality of connection blocks (11), and the connection blocks (11) are inserted into the notch of the mounting ring (13) from top to bottom, thereby limiting the position of the guide plate (2) and the mounting ring (13).

6. A municipal intelligent pipe network drainage system according to claim 5, characterized in that: The connecting block (11) is in the shape of a U-shaped groove, a mechanical return block (12) is hingedly connected inside the connecting block (11), and both the connecting block (11) and the mechanical return block (12) are located in a notch of the mounting ring (13).

7. A municipal intelligent pipe network drainage system according to claim 1, characterized in that: A water level sensor (22) and a water flow sensor (23) are installed in the water well body (1); a sewage conduit (18) and a rainwater conduit (17) are installed on the sewage outlet (14) and the rainwater outlet (15), respectively; and automatic valves (16) are installed on the sewage conduit (18) and the rainwater conduit (17), respectively.

8. A municipal intelligent pipe network drainage system according to claim 7, characterized in that: A filtering device (19) is installed inside the water well body (1) at the sewage outlet (14).

9. The method for operating a municipal intelligent pipe network drainage system according to claim 7 is characterized in that: The operation method comprises the following steps: S1, light rain or initial rainwater flows normally into the water well body (1) through the diversion groove (3), flows to the bottom of the water well body (1) by gravity, and is discharged from the sewage outlet (14); S2. When the flow velocity of rainwater flowing into the water well body (1) through the diversion groove (3) increases, the water flows through the diversion groove (3) to form an oblique vortex water flow, thereby flushing the diversion strip (7) on the diversion housing (8). The diversion housing (8) rises along the spiral rod (5) under the reaction force, and the rainwater outlet (15) is opened at this time; S3, when the diverter housing (8) moves upward and the edge of the diverter housing (8) gradually abuts against the lever (25), the lever (25) swings upward, thereby lifting the baffle (24) through the push seat (26), thereby increasing the water flow throughput; S4. At this time, the water flow sensor (23) detects that the water flow is increasing, and controls the automatic valve (16) on the sewage conduit (18) to close through the controller. At this time, the later rainwater is discharged from the rainwater outlet (15) to the river. If the water level in the well body (1) continues to rise and continues to exceed the threshold of the water level sensor (22) for a period of time, the water level sensor (22) controls the automatic valve (16) on the sewage conduit (18) to open through the controller for emergency drainage.

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