CN111335437A - Shunt system for controlling sewage and initial rainwater pollution - Google Patents

Abstract

The invention relates to a diversion system for controlling sewage and initial rainwater pollution. The diversion system for controlling sewage and initial rainwater pollution includes a rainwater pipeline, a sewage pipeline and a diversion control unit. The rainwater pipeline is parallel to the sewage pipeline, and the rainwater pipeline There are several shunt control units on it, and the shunt control unit is connected to the sewage pipeline through the shunt pipe; the shunt control unit includes a shunt well, one side of the shunt well is provided with a first inlet, and the shunt well on the other side of the first inlet is provided with a second inlet. an outlet, the first inlet and the first outlet are respectively connected to the rainwater pipes on both sides of the diversion well; the side of the diversion well close to the sewage pipeline is provided with a second outlet; the diversion control unit is provided with a passage control unit, and the passage control unit is used to control the first The opening degree of the second outlet; the invention creatively adopts the method of diverting the rainwater pipeline to avoid contamination of the natural water body by rainwater in the early stage of rainfall, ground cleaning, and mixed drainage of sewage and rainwater.

Description

A diversion system for controlling sewage and primary rainwater pollution

technical field

The invention belongs to the technical field of environmental protection, and in particular relates to a diversion system for controlling pollution of sewage and initial rainwater.

Background technique

The urban municipal drainage system is mainly divided into a combined drainage system and a split drainage system. The earliest combined drainage system is to mix sewage, industrial waste water and rainwater in the same pipe, and discharge it directly into the nearby water body without any treatment, causing serious pollution to the receiving water body. Almost many old cities at home and abroad have in this way. Now often used is a closed-flow combined drainage system.

The interception and confluence drainage system is basically the same in structure as the traditional confluence drainage system. The difference is that the interception and confluence drainage system is provided with a interception well between the municipal confluence main pipe and the sewage treatment plant. When the closed-flow combined drainage system works, the sewage discharged by the residents and the rainwater collected by the rainwater outlet enter the municipal combined main pipe through the combined pipe, and the rainwater collected by the rainwater inlet along the municipal road also enters the municipal combined main pipe, at the end of the main pipe. Set up interception wells. On sunny days, all sewage is transported to a sewage treatment plant and discharged into natural water bodies after treatment. During rainfall, sewage and rainwater in the early stage of rainfall will also be transported to the sewage treatment plant, and then discharged into natural water bodies after treatment. However, with the increase of rainfall, the runoff of rainwater also increases. When the flow of mixed sewage exceeds the water conveying capacity of the intercepting main pipe, part of the mixed sewage will overflow and directly enter the natural water body.

For this combined drainage system, the main problems are: ①During rainfall, non-point source pollution will occur on residential areas and municipal roads. Although the existing combined drainage system is provided with interception wells at the end for interception, the designed interception If the multiple is not enough, the interception well fails to intercept the surface source pollutants, and the surface source pollutants directly enter the natural water body, causing pollution to the natural water body. ②In order to control the surface source pollution, it is necessary to increase the size of the interception well, increase the size of the interception main pipe, and increase the capacity of the sewage treatment plant. ③ The interception of the interception well is an extensive control, which cannot accurately intercept the initial rainwater. According to the different ways of removing rainwater, the diversion drainage system is divided into two drainage systems: complete diversion system and incomplete diversion system. The complete separation drainage system completely separates rainwater from sewage and industrial sewage, and transports them by different pipes. The sewage discharged by the residents enters the sewage main pipe through the sewage pipeline, and then is transported to the sewage treatment plant for treatment and then discharged. The rainwater collected by the rainwater gully along the municipal road also enters the rainwater main pipe and is directly discharged to the natural water body. There are many problems in this segregated drainage system: ① Part of the sewage in the residential area enters the rainwater pipeline by mistake. For example, the sewage discharged from the washing machine on the balcony will be directly discharged into the natural water body. ② Part of the sewage on the municipal roads enters the rainwater pipeline by mistake. For example, the sewage generated during road cleaning will be directly discharged into the natural water body. ③During rainfall, non-point source pollution will occur in residential areas and municipal roads, and non-point source pollutants will directly enter natural water bodies. The incomplete segregation system is mainly aimed at the collection and treatment of rainwater, which separates the rainwater collected in residential areas from the rainwater collected on municipal roads. The sewage discharged by the residents and the rainwater collected by the rainwater outlet are all discharged through the combined pipeline, and the interception well is set up for interception before entering the municipal drainage pipeline. The rainwater collected by the rainwater gully along the municipal road enters the rainwater main pipe and is directly discharged to the natural water body. On sunny days, the sewage discharged from the residential area is intercepted to the sewage main pipe, and then transported to the sewage treatment plant, and then discharged into the natural water body after treatment. When it rains, the sewage discharged from the residential area and the rainwater in the early stage of the rainfall will also be intercepted to the sewage main pipe, and then transported to the sewage treatment plant, and then discharged into the natural water body after treatment. However, as the rainfall increases, the rainwater runoff also increases. After the flow of mixed sewage exceeds the water conveying capacity of the interception pipeline, some of the mixed sewage will overflow and directly enter the rainwater trunk. to natural bodies of water. The main problems of this kind of drainage system are: ① The whole system cannot effectively intercept the surface pollutants, and the interception efficiency is low. ② The sewage entering the rainwater pipeline cannot be controlled. ③When it rains, the sewage is easily carried into the natural water body by the rain. ④ The control of the interception well is extensive. On the one hand, it may not be able to send more initial rainwater to the sewage treatment plant, so that the non-point source pollutants are discharged into the natural water body. The load of the plant reduces the treatment efficiency of the sewage plant.

In general, the current drainage system has the following problems: first, it cannot control the surface pollution; second, the control is extensive, and the sewage and initial rainwater cannot be accurately controlled; third, the pipelines are mixed, and the sewage is directly discharged to the natural water bodies; fourth, for areas with tight land use, end-of-line governance cannot be effectively implemented.

The Chinese invention patent with the publication number CN105625545A and the invention title is "A regional segmented rainwater treatment system based on a split pipe network" provides a new pipe network division method to solve the above problems. The application divides the entire pipeline network into grid-like areas by area, and each area is provided with a separate online rainwater treatment facility, and the rainwater in the area is comprehensively treated through the online rainwater treatment facility in the area. However, after a lot of experiments, the inventors found that this kind of terminal treatment idea improves the rainwater treatment efficiency and degree in the corresponding area to a certain extent, and controls the non-point source pollution in the area; but there is still surface runoff. The problem is that the collection is difficult to accurately control. Moreover, there is a time difference between the first rain collection at the farthest and the nearest end of the online rainwater treatment facility, and the collection of the first rain and non-point source pollution cannot be accurately controlled, so accurate governance cannot be achieved. In addition, due to the problem of urban planning, there is a lot of interference in dividing the urban pipeline network into grid-like areas, which is very difficult to realize, which will cause great trouble to the layout of the urban pipeline network in this mode.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a diversion system that can solve the pollution of natural water bodies by rainwater in the initial stage of rainfall, ground cleaning, and mixed discharge of sewage and rainwater to control sewage and initial rainwater pollution.

The present invention realizes above-mentioned purpose through following technical scheme:

A diversion system for controlling sewage and initial rainwater pollution, comprising a rainwater pipeline, a sewage pipeline and a diversion control unit, wherein the rainwater pipeline is parallel to the sewage pipeline, a plurality of diversion control units are arranged on the rainwater pipeline, and the diversion control unit passes through the diversion pipeline. connect sewage pipes;

The diversion control unit includes a diversion well. One side of the diversion well is provided with a first inlet. The first inlet corresponds to the diversion well on the other side and is provided with a first outlet. The first inlet and the first outlet are respectively connected to the rainwater pipes on both sides of the diversion well. ;

The side of the diversion well close to the sewage pipeline is provided with a second outlet, the second outlet is connected to the inlet end of the diversion pipeline, and the outlet end of the diversion pipeline is connected to the sewage pipeline;

The height of the first outlet is greater than the height of the second outlet, and is located above the second outlet;

The diversion control unit is provided with a passage control unit, and the passage control unit is used for controlling the opening degree of the second outlet.

As a further optimized solution of the present invention, the sewage pipeline is provided with several sewage wells, and the sewage wells are provided with an inlet connected to the branch pipeline.

As a further optimized solution of the present invention, the sewage pipeline is finally connected to a sewage treatment plant.

As a further optimized solution of the present invention, the access control unit includes a dynamic power transmission mechanism, a lifting mechanism, an opening and closing mechanism, and a reset mechanism. The dynamic power transmission mechanism is connected to the opening and closing mechanism through the lifting mechanism, and the opening and closing mechanism is arranged in the second The opening of the second outlet is controlled on the outlet; the reset mechanism is connected to the lifting mechanism to drive the opening and closing mechanism to reset;

The dynamic power transmission mechanism includes an impeller, an input shaft, a reversing transmission mechanism and an output shaft;

The lifting mechanism includes gears and racks;

The opening and closing mechanism includes a valve plate and a sliding seat;

The reset mechanism includes a tension spring;

The impeller is arranged in the rainwater pipe on the side of the first inlet, and the impeller is fixedly arranged at the lower end of the input shaft. The upper end of the input shaft is connected to one end of the output shaft through a reversing transmission mechanism, and the other end of the output shaft is fixedly connected to a gear, which meshes with the rack. The lower end of the rack is fixedly connected to the valve plate, the valve plate is slidably connected to the sliding seat, and a tension spring is arranged between the top of the valve plate and the sliding seat.

The rainwater in the rainwater pipe impacts the impeller to drive the impeller to rotate, the impeller rotates to drive the input shaft to rotate, the input shaft rotates through the transmission of the transmission mechanism to drive the output shaft to rotate, the output shaft rotates to drive the gear to rotate, and the gear drives the rack to move up and down, which in turn drives the valve plate to move up and down , the relative position of the valve plate movement and the second outlet changes the coverage area of the second outlet, so as to realize the adjustment of its opening.

As a further optimized solution of the present invention, the reversing transmission mechanism is a bevel gear transmission mechanism, including a driving bevel gear and a driven bevel gear, the driving bevel gear and the driven bevel gear are fixedly connected to the input shaft and the driven shaft, respectively, and the driving bevel gear The gear meshes with the driven bevel gear.

As a further optimized solution of the present invention, a sleeve is provided on the outside of the input shaft and the output shaft, a bearing is arranged between the input shaft and the sleeve, and a bearing is arranged between the output shaft and the sleeve. On the one hand, the casing isolates the contact between the mechanical structure and the soil, and on the other hand supports the input shaft and the output shaft.

As a further optimized solution of the present invention, the output shaft is connected to a limit mechanism, and the limit mechanism includes a ratchet wheel, a pawl, a spring, a slider, a slide rail, a connecting rod and a floating ball. The ratchet wheel is fixed on the output shaft, and the ratchet wheel and the The pawl is matched, the pawl is connected to the slider through a pin shaft, and a spring is arranged between the bottom of the pawl and the slider, the slider is slidably connected to the slide rail in the shunt, and the bottom of the slider is fixedly connected to the upper end of the connecting rod. The lower end of the rod is fixedly connected to the floating ball.

As a further optimized solution of the present invention, the access control unit is an electric valve, and the electric valve is connected to the control system. The control system includes a controller, a power supply unit, and a rain sensor. The controller is connected to the rain sensor and the electric valve, and the electric valve and the controller are both connected. Connect the power supply unit.

As a further optimized solution of the present invention, the electric valve includes a motor and a valve, the output shaft of the motor is connected to the valve stem of the valve, the motor is connected to the power supply unit through the driver, and the signal input end of the driver is connected to the signal output end of the controller.

The beneficial effects of the present invention are:

1) The present invention creatively adopts the method of diverting the rainwater pipeline, and sets up the communication sewage pipeline controlled by the diversion control unit, and discharges the more polluted sewage such as initial rainwater, ground cleaning water, balcony sewage into the sewage pipeline, and after the initial stage of precipitation, the sewage is discharged into the sewage pipeline. During the precipitation period, the second outlet is closed, and the rainwater is normally discharged into the natural water body, while maintaining the normal function of the rainwater pipeline;

2) The access control unit of the present invention creatively adopts pure mechanical structure, which can obtain power through the flowing water in the pipeline, without external power source, and can be linked with the flow of rainwater in the pipeline, dynamically synchronizing, through the flow of rainwater in the pipeline. The function of the valve plate is dynamically controlled, so as to solve the problem of sewage discharge of the first rain.

Description of drawings

1 is a schematic diagram of the system structure of the present invention in Embodiment 1;

Fig. 2 is the schematic diagram of the diversion control unit of the present invention in a sunny day in the first embodiment;

3 is a schematic diagram of the mixed discharge of rainwater in the early stage of rainfall, ground cleaning, and sewage and rainwater of the diversion control unit of the present invention in the first embodiment;

4 is a schematic diagram of the diversion control unit of the present invention in a rainy day in the first embodiment;

5 is a schematic structural diagram of a flow splitting control unit of the present invention in the second embodiment;

6 is a schematic structural diagram of a flow splitting control unit of the present invention in Embodiment 3;

FIG. 7 is a schematic structural diagram of the ratchet wheel and the ratchet pawl of the present invention in the third embodiment.

In the figure: rainwater pipeline 1, sewage pipeline 2, diversion control unit 3, diversion well 4, first inlet 5, first outlet 6, second outlet 7, access control unit 8;

Dynamic power transmission mechanism 81, lifting mechanism 82, opening and closing mechanism 83, reset mechanism 84;

Impeller 811, input shaft 812, reversing transmission mechanism 813, output shaft 814;

Gear 821, rack 822;

valve plate 831, sliding seat 832;

tension spring 841;

Ratchet 851 , pawl 852 , spring 853 , slider 854 , slide rail 855 , connecting rod 856 and float 857 .

Detailed ways

The application will be described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific embodiments are only used to further illustrate the application, and should not be construed as limiting the protection scope of the application. Those skilled in the art can The above application content makes some non-essential improvements and adjustments to this application.

Example 1

As shown in Figures 1-4, a diversion system for controlling sewage and initial rainwater pollution includes a rainwater pipeline 1, a sewage pipeline 2 and a diversion control unit 3. The rainwater pipeline 1 is parallel to the sewage pipeline 2, and the rainwater pipeline 1 is on the There are several shunt control units 3, and the shunt control units 3 are connected to the sewage pipeline 2 through the shunt pipeline;

The shunt control unit 3 includes a shunt well 4, one side of the shunt well 4 is provided with a first inlet 5, the first inlet 5 is provided with a first outlet 6 on the shunt well 4 on the other side, the first inlet 5 and the first outlet 6. Connect the rainwater pipes 1 on both sides of the diversion well 4 respectively;

The side of the diversion well 4 close to the sewage pipeline 2 is provided with a second outlet 7, the second outlet 7 is connected to the inlet end of the diversion pipeline, and the outlet end of the diversion pipeline is connected to the sewage pipeline 2;

The height of the first outlet 6 is greater than the height of the second outlet 7, and is located above the second outlet 7;

The diversion control unit 3 is provided with a passage control unit 8, and the passage control unit 8 is used to control the opening of the second outlet 7;

For rainfall, the rainwater enters the rainwater pipe 1 from the ground manhole cover at the beginning of the rainfall, and then is discharged into the sewage pipe 2 from the branch pipe. After the initial rainfall, the access control unit 8 closes the second outlet 7, and the rainwater is discharged from the first outlet 6 and finally discharged into the river in natural water bodies.

For floor cleaning, due to the small amount of water, it is directly discharged from the second outlet 7 into the sewage pipe 2 and will not be discharged into the natural water body.

For the mixed drainage of sewage and rainwater, although the balcony sewage is discharged into the rainwater pipe 1, but because the discharge volume is small, it will be directly discharged from the second outlet 7 into the sewage pipe 2, and will not be discharged into the natural water body.

Preferably, the sewage pipeline 2 is provided with several sewage wells, and the sewage wells are provided with inlets connected to the branch pipes.

Preferably, the sewage pipeline 2 is ultimately connected to a sewage treatment plant.

In order to solve the problem in the prior art that the rainwater at the initial stage of rainfall, the ground cleaning, the mixed discharge of sewage and rainwater, etc. cause the initial rainwater, ground cleaning water, balcony sewage and other highly polluted sewage to enter the natural water body, a diversion control unit 3 is provided. The controllable connecting sewage pipeline 2 , discharge the more polluted sewage such as initial rainwater, ground cleaning water, balcony sewage into the sewage pipeline 2, and close the second outlet 7 in the precipitation period after the initial precipitation period, and discharge the rainwater into the natural water body normally.

Embodiment 2

As shown in FIG. 5 , as a specific embodiment, the access control unit 8 includes a dynamic power transmission mechanism 81 , a lifting mechanism 82 , an opening and closing mechanism 83 and a reset mechanism 84 , and the dynamic power transmission mechanism 81 is connected by a lifting mechanism 82 . The opening and closing mechanism 83, the opening and closing mechanism 83 is arranged on the second outlet 7 to control the opening of the second outlet 7; the reset mechanism 84 is connected to the lifting mechanism 82 to drive the opening and closing mechanism 83 to reset;

The dynamic power transmission mechanism 81 includes an impeller 811, an input shaft 812, a reversing transmission mechanism 813 and an output shaft 814;

The lifting mechanism 82 includes a gear 821 and a rack 822;

The opening and closing mechanism 83 includes a valve plate 831 and a sliding seat 832;

The reset mechanism 84 includes a tension spring 841;

The impeller 811 is arranged in the rainwater pipe 1 on the side of the first inlet 5 . The impeller 811 is fixedly arranged at the lower end of the input shaft 812 . One end is fixedly connected to the gear 821, the gear 821 is engaged with the rack 822, the lower end of the rack 822 is fixedly connected to the valve plate 831, the valve plate 831 is slidably connected to the sliding seat 832, and a tension spring is provided between the top of the valve plate 831 and the sliding seat 832 841.

The rainwater in the rainwater pipe 1 impacts the impeller 811 to drive the impeller 811 to rotate, the impeller 811 rotates to drive the input shaft 812 to rotate, the input shaft 812 rotates through the transmission of the transmission mechanism to drive the output shaft 814 to rotate, the output shaft 814 rotates to drive the gear 821 to rotate, and the gear 821 drives The rack 822 moves up and down, which in turn drives the valve plate 831 to move up and down. The relative position of the valve plate 831 and the second outlet 7 changes the coverage area of the second outlet 7 to adjust its opening.

Preferably, the reversing transmission mechanism 813 is a bevel gear 821 transmission mechanism, including a driving bevel gear 821 and a driven bevel gear 821, the driving bevel gear 821 and the driven bevel gear 821 are fixedly connected to the input shaft 812 and the driven shaft respectively, and the driving bevel gear 821 and the driven bevel gear 821 are respectively connected. The gear 821 and the driven bevel gear 821 mesh with each other.

Preferably, sleeves are provided on the outside of the input shaft 812 and the output shaft 814 , a bearing is arranged between the input shaft 812 and the sleeve, and a bearing is arranged between the output shaft 814 and the sleeve. The casing isolates the mechanical structure from contact with the soil on the one hand, and supports the input shaft 812 and the output shaft 814 on the other hand.

The working principle of the present invention: on a sunny day, the flow rate in the rainwater pipe 1 is small and the liquid level is low, so that the impeller 811 cannot be driven to rotate, so the valve plate 831 is kept at a high position due to the action of the tension spring 841, so that the second outlet 7 is normally open state;

During precipitation, the water flow in the early stage of the rainfall drives the impeller 811 to rotate, and then drives the input shaft 812 to rotate. The input shaft 812 drives the output shaft 814 to rotate through the reversing transmission mechanism 813, and then drives the valve plate 831 to descend through the lifting mechanism 82. This process is a continuous process. The process is not a transient process. The valve plate 831 descends until the second outlet 7 is completely closed. The time T is adjusted recently, and the second outlet 7 is still open during the time T, so that the initial rainwater in the early stage of rainfall is discharged into the sewage pipe 2 from the second outlet 7, so as to avoid polluting the natural water body and realize the diversion of rainfall and rainwater. After the time T The second outlet 7 is closed, and the rainwater is discharged from the first outlet 6 to the natural water body.

It is precisely because of the existence of time T that even if the impeller 811 is rotated due to the floor cleaning, the drainage time caused by the floor cleaning is short, and the second outlet 7 is not closed, so the sewage from the floor cleaning will also be discharged from the second outlet 7 into the sewage outlet. , it will not cause the problem of ground cleaning water entering the natural water body by mistake.

Embodiment 3

As shown in Figures 6-7, further, as an optimization of the second embodiment, the output shaft 814 is connected to a limit mechanism, and the limit mechanism includes a ratchet 851, a ratchet 852, a spring 853, a slider 854, a sliding rail 855, a connecting The rod 856 and the floating ball 857, the ratchet wheel 851 is fixed on the output shaft 814, the ratchet wheel 851 cooperates with the pawl 852, the pawl 852 is connected to the slider 854 through a pin, and the bottom of the pawl 852 and the slider 854 are provided with The spring 853 and the slider 854 are slidably connected to the slide rail 855 in the shunt 4 , the bottom of the slider 854 is fixedly connected to the upper end of the connecting rod 856 , and the lower end of the connecting rod 856 is fixedly connected to the floating ball 857 .

The floating ball 857 is affected by the liquid level in the shunt well 4. In sunny days, since there is no liquid level or the liquid level is low, the floating ball 857 is located at a low position, the slider 854 and the pawl 852 are also located at a low position, and the pawl 852 is separated from the ratchet 851;

When it rains, the liquid level inside the diverter well 4 rises, which drives the float ball 857 and the ratchet 852 to rise. The ratchet 852 cooperates with the ratchet 851 to make the ratchet 851 rotate in one direction. At this time, the output shaft 814 drives the ratchet 851 to rotate in one direction to drive the valve. When the plate 831 descends, due to the action of the pawl 852, the tension spring 841 will not drive the valve plate 831 to reset (the output shaft 814 is reversed), and the valve plate 831 can only be lowered.

When it is sunny, the liquid level inside the diverter well 4 drops, which drives the float ball 857 and the pawl 852 to descend and separate from the ratchet wheel 851 , the one-way limit of the ratchet wheel 851 is released, and the tension spring 841 can drive the valve plate 831 to reset and reopen the second outlet 7 .

A spring 853 is provided at the bottom of the pawl 852 , and the spring 853 can keep the pawl 852 in cooperation with the ratchet wheel 851 to prevent the pawl 852 from being unable to cooperate with the ratchet wheel 851 due to gravity.

On sunny days, the height of the float 857 is 1/4 of the height of the first outlet 6 . The floating ball 857 can rise earlier to drive the ratchet pawl 852 to cooperate with the ratchet wheel 851 .

Embodiment 4

As another high-cost embodiment, the access control unit 8 is an electric valve, and the electric valve is connected to the control system. The control system includes a controller, a power supply unit and a rain sensor. The controller is connected to the rain sensor and the electric valve. The electric valve and the control system are connected to the power supply unit.

Preferably, the controller includes a circuit module, and the circuit module is connected to the power supply unit. The circuit module can convert the power supply of the power supply unit into the low-voltage power supply used by the controller.

Preferably, the electric valve includes a motor and a valve, the output shaft 814 of the motor is connected to the valve stem of the valve, the motor is connected to the power supply unit through the driver, and the signal input end of the driver is connected to the signal output end of the controller.

Preferably, the power supply unit adopts a solar cell. Using solar power supply, the layout is more flexible, of course, ordinary batteries and mains power supply can also be used.

This implementation is relatively automatic. Only when the rain sensor detects rainfall, the electric valve is closed to close the second outlet 7, and the second outlet 7 is opened at other times to discharge the more polluted sewage such as floor washing water and balcony sewage into the sewage pipeline. 2;

When the precipitation is detected, the valve is delayed to be closed, and the initial rainwater in the delayed stage can still enter the sewage pipeline 2 through the second outlet 7. After the valve is closed, the clean rainwater is finally discharged into the natural water body through the first outlet 6.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention.

Claims (9)

1. a diversion system that controls sewage and initial rainwater pollution, is characterized in that: comprise rainwater pipeline, sewage pipeline and diversion control unit, described rainwater pipeline and sewage pipeline are parallel, and rainwater pipeline is provided with several diversion control units, The shunt control unit is connected to the sewage pipeline through the shunt pipe; The diversion control unit includes a diversion well. One side of the diversion well is provided with a first inlet. The first inlet corresponds to the diversion well on the other side and is provided with a first outlet. The first inlet and the first outlet are respectively connected to the rainwater pipes on both sides of the diversion well. ; The side of the diversion well close to the sewage pipeline is provided with a second outlet, the second outlet is connected to the inlet end of the diversion pipeline, and the outlet end of the diversion pipeline is connected to the sewage pipeline; The height of the first outlet is greater than the height of the second outlet, and is located above the second outlet; The diversion control unit is provided with a passage control unit, and the passage control unit is used for controlling the opening degree of the second outlet. 2 . The diversion system for controlling sewage and initial rainwater pollution according to claim 1 , wherein the sewage pipeline is provided with several sewage wells, and the sewage wells are provided with an inlet connected to the diversion pipeline. 3 . 3 . The diversion system for controlling pollution from sewage and initial rainwater according to claim 1 , wherein the sewage pipeline is finally connected to a sewage treatment plant. 4 . 4. A diversion system for controlling sewage and initial rainwater pollution according to claim 1, wherein the access control unit comprises a dynamic power transmission mechanism, a lifting mechanism, an opening and closing mechanism and a reset mechanism, and the dynamic The power transmission mechanism is connected with the opening and closing mechanism through the lifting mechanism, and the opening and closing mechanism is arranged on the second outlet to control the opening degree of the second outlet; the reset mechanism is connected with the lifting mechanism to drive the opening and closing mechanism to reset; The dynamic power transmission mechanism includes an impeller, an input shaft, a reversing transmission mechanism and an output shaft; The lifting mechanism includes gears and racks; The opening and closing mechanism includes a valve plate and a sliding seat; The reset mechanism includes a tension spring; The impeller is arranged in the rainwater pipe on the side of the first inlet, and the impeller is fixedly arranged at the lower end of the input shaft. The upper end of the input shaft is connected to one end of the output shaft through a reversing transmission mechanism, and the other end of the output shaft is fixedly connected to a gear, which meshes with the rack. The lower end of the rack is fixedly connected to the valve plate, the valve plate is slidably connected to the sliding seat, and a tension spring is arranged between the top of the valve plate and the sliding seat. 5 . The diversion system for controlling sewage and initial rainwater pollution according to claim 4 , wherein the reversing transmission mechanism is a bevel gear transmission mechanism, comprising a driving bevel gear and a driven bevel gear, and a driving bevel gear. 6 . The gear and the driven bevel gear are respectively fixedly connected to the input shaft and the driven shaft, and the driving bevel gear and the driven bevel gear mesh with each other. 6 . The diversion system for controlling pollution of sewage and initial rainwater according to claim 4 , wherein the input shaft and the output shaft are both provided with sleeves, and a bearing is arranged between the input shaft and the sleeve. 7 . , a bearing is set between the output shaft and the sleeve. 7. A diversion system for controlling sewage and initial rainwater pollution according to claim 4, wherein the output shaft is connected to a limit mechanism, and the limit mechanism comprises a ratchet, a pawl, a spring, a slider, a slide Rail, connecting rod and floating ball, the ratchet wheel is fixed on the output shaft, the ratchet wheel is matched with the pawl, the pawl is connected to the slider through the pin, and a spring is arranged between the bottom of the pawl and the slider, the slider and the shunt well The bottom of the slider is fixedly connected to the upper end of the connecting rod, and the lower end of the connecting rod is fixedly connected to the floating ball. 8. The diversion system for controlling sewage and initial rainwater pollution according to claim 1, wherein the access control unit is an electric valve, and the electric valve is connected to a control system, and the control system comprises a controller, a power supply unit and The rain sensor and the controller are connected to the rain sensor and the electric valve, and both the electric valve and the controller are connected to the power supply unit. 9 . The diversion system for controlling sewage and initial rainwater pollution according to claim 8 , wherein the electric valve comprises a motor and a valve, the output shaft of the motor is connected to the valve stem of the valve, and the motor is connected to supply power through a driver. 10 . unit, the signal input end of the driver is connected to the signal output end of the controller.

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