CN114703942A - Rainwater interception system - Google Patents
Rainwater interception system Download PDFInfo
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- CN114703942A CN114703942A CN202210554479.8A CN202210554479A CN114703942A CN 114703942 A CN114703942 A CN 114703942A CN 202210554479 A CN202210554479 A CN 202210554479A CN 114703942 A CN114703942 A CN 114703942A
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- rainwater
- pipe
- control valve
- electric control
- turbidity
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
- E03F2201/10—Dividing the first rain flush out of the stormwater flow
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
- E03F2201/20—Measuring flow in sewer systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
Abstract
The invention discloses a rainwater interception system, comprising: the control system comprises a water stopping ridge, a main pipe, a drainage pipe communicated with the main pipe in parallel, a turning elbow communicated with the main pipe in series, and a rainwater pipe and a sewage pipe communicated with the turning elbow through a three-way pipe; wherein, the water outlet of the sewage pipe is communicated with the water outlet of the rainwater pipe through a vertical shaft; the water stopping ridge is arranged on the main pipe; the invention takes water quality as the judgment standard of initial rainwater separation, adopts a turbidity method to measure the initial rainwater quality condition, and completes the automatic interception of the system according to the turbidity method so as to deal with random factors of rainfall; and the system is provided with the early warning device, still has conventional drainage capacity when the system breaks down, and can not cause pipeline blockage, thereby avoiding road ponding or urban waterlogging.
Description
Technical Field
The invention relates to the technical field of rainwater closure, in particular to a rainwater closure system.
Background
The urban drainage system is an important component of urban infrastructure construction, is an important link for protecting urban water quality resources and resident living environment, and is generally divided into a confluence system and a shunt system in the prior art;
the combined drainage system can be divided into a direct-discharge combined system, a cut-off treatment combined system and a full-treatment combined system according to the different generation sequence and treatment degree of rain, sewage and wastewater. Direct drainage type confluence system directly discharges rainwater and sewage into a water body, and causes pollution to the water body. The intercepting type confluence system treats high-pollution initial rainwater and sewage with more suspended matters, which is beneficial to protecting a water body, but the rainfall is too large, when the mixed sewage exceeds the designed flow of the intercepting pipe, the excess part overflows to an urban river channel, and the water body is polluted locally and in a short term; and the sewage entering the sewage treatment plant increases the workload of the sewage treatment plant due to the mixing of a large amount of rainwater, and has higher requirements on the treatment process of the sewage treatment plant. The complete flow combining system is more suitable for areas with smaller rainfall and higher requirements on water quality of water bodies, but has high requirements on the treatment capacity of a sewage treatment plant and needs a large amount of investment and operation cost; the split-flow drainage system is divided into a complete split-flow system, a shutoff split-flow system and an incomplete split-flow system according to different rainwater drainage modes. The full split system only treats the collected sewage, and the rainwater is directly discharged into the water body after being collected, so that the initial rainwater can seriously pollute the water body because the initial rainwater generally contains a large amount of pollutants and suspended solids. The incomplete split stream system is mainly used for cities with suitable terrains, less rain all the year round and dry climate, and has more limiting factors. The intercepting type shunt system can overcome the defect of complete shunt system, can better protect the water body from being polluted, and because only sewage and initial rainwater are received, the section of the intercepting pipe is smaller than that of the intercepting type shunt system, the flow and the water quality entering the intercepting pipe are relatively stable, and the operation management cost of a water pump station and a sewage treatment plant can be reduced.
In combination with the prior art, the closure system for initial rainwater also has the following problems:
(1) the interception index is too rough, scientific basis is lacked, and interception of initial rainwater with high pollution is not accurate enough;
(2) during sewage interception and closure, the drainage speed is ignored, and the condition that the device fails is not considered, so that road water accumulation or urban waterlogging can be caused when the rainfall is too large;
(3) the initial rainwater after mechanical filtration and precipitation still contains a great deal of pollution, can cause pollution to the water body, and is not suitable for being directly discharged into the natural water body;
(4) too much land resources are occupied, and the device is inconvenient to overhaul when in failure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a rainwater interception system, which takes water quality as a judgment standard for initial rainwater separation, adopts a turbidity method to measure the water quality condition of initial rainwater, and finishes automatic interception of the system according to the turbidity method so as to deal with random factors of rainfall; and the system is provided with the early warning device, still has conventional drainage capacity when the system breaks down, and can not cause pipeline blockage, thereby avoiding road ponding or urban waterlogging.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
a rainwater shutoff system comprising:
control system and
the rainwater collection device comprises a water stopping ridge, a main pipe, a drainage pipe communicated with the main pipe in parallel, a turning elbow communicated with the main pipe in series, and a rainwater pipe and a sewage pipe communicated with the turning elbow through a three-way pipe;
wherein, the water outlet of the sewage pipe is communicated with the water outlet of the rainwater pipe through a vertical shaft;
the backwater bank is arranged on the main pipe.
Preferably, the control system comprises:
the device comprises a trigger, a turbidity sensor, an electric control valve A and an electric control valve B;
wherein the trigger is in communication connection with the turbidity sensor;
the turbidity sensor is respectively in communication connection with the electric control valve A and the electric control valve B,
the electric control valve A is arranged at the joint of the vertical shaft and the rainwater pipe; the electric control valve B is arranged at the joint of the vertical shaft and the sewage pipe;
the trigger is arranged in the drainage tube and used as a starting switch of the control system;
the turbidity sensor is arranged at a water inlet of the sewage pipe and used for collecting rainwater turbidity parameters.
Preferably, the turbidity sensor is in particular:
the turbidity sensor comprises a turbidity sensor sub-device and a control sub-device, wherein the turbidity sensor sub-device is respectively in communication connection with a trigger and the control sub-device, and the control sub-device is respectively in communication connection with an electric control valve A and an electric control valve B.
Preferably, the control process of the control system is specifically as follows:
the method comprises the following steps that a turbidity sensor sub-device collects current rainwater turbidity data of a water inlet of a sewage pipe and transmits the current rainwater turbidity data to a control sub-device, the control sub-device receives the current rainwater turbidity data and judges whether preset rainwater turbidity is met, and if the preset rainwater turbidity is met, a first control signal is output and transmitted to an electric control valve A and an electric control valve B; otherwise, outputting a second control signal and transmitting the second control signal to the electric control valve A and the electric control valve B;
wherein; the first control signal is: closing the electric control valve A, and opening the electric control valve B;
the second control signal is: and the electric control valve A is opened, and the electric control valve B is closed.
Preferably, a force eliminating threshold is arranged at the front end of the turbidity sensor; the absorption ridge is used for forming a low-flow-rate backflow area at the downstream, and the loss of the turbidity sensor is reduced.
Preferably, a first acceleration ramp is arranged at the confluence position of the drainage pipe and the main pipe;
and a second accelerating ramp is arranged at the joint of the three-way pipe and the rainwater pipe.
The invention has the following beneficial effects:
the method comprises the following steps: the control system comprises a water damming ridge, a main pipe, a drainage pipe, a turning bent pipe, a rainwater pipe and a sewage pipe, wherein the drainage pipe is communicated with the main pipe in parallel, the turning bent pipe is communicated with the main pipe in series, and the rainwater pipe and the sewage pipe are communicated with the turning bent pipe through a three-way pipe; wherein, the water outlet of the sewage pipe is communicated with the water outlet of the rainwater pipe through a vertical shaft; the water stopping ridge is arranged on the main pipe; the invention takes water quality as the judgment standard of initial rainwater separation, adopts a turbidity method to measure the initial rainwater quality condition, and completes the automatic interception of the system according to the turbidity method so as to deal with random factors of rainfall; and the system is provided with the early warning device, still has conventional drainage capacity when the system breaks down, and can not cause pipeline blockage, thereby avoiding road ponding or urban waterlogging.
Drawings
Fig. 1 is a schematic structural view of a rainwater interception system according to the present invention;
FIG. 2 is a detailed structural view of a three-way pipe provided by the invention;
FIG. 3 is a schematic diagram illustrating a curved circulation phenomenon according to an embodiment of the present invention;
fig. 4 is a schematic view of the geometrical parameters of the rainwater interception system according to the embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, a rainwater shutoff system includes:
control system and
the rainwater collection device comprises a water stopping ridge, a main pipe, a drainage pipe communicated with the main pipe in parallel, a turning elbow communicated with the main pipe in series, and a rainwater pipe and a sewage pipe communicated with the turning elbow through a three-way pipe;
wherein, the water outlet of the sewage pipe is communicated with the water outlet of the rainwater pipe through a vertical shaft;
the backwater bank is arranged on the main pipe.
In the embodiment of the invention, the rainfall is small in the early stage of rainfall, and due to the existence of the water blocking ridge, the water flow can be blocked, most of the water flow is divided to the drainage tube and is quickly accumulated to the specified water level, the trigger gate is pushed, and the circuit control system is started; the rainfall is great in the later stage of rainfall, and the drainage tube can enable the rainwater to be drained more rapidly. If the trigger gate in the drainage tube breaks down, the main tube can ensure that the system still has basic drainage capacity, and road ponding or urban waterlogging is avoided;
the trigger valve, the turbidity sensor and the electric control valve are provided with inspection wells, so that the key devices are convenient to maintain and overhaul, and the service life of the invention is prolonged.
FIG. 2 is a detailed structural diagram of a tee in the embodiment of the present invention.
Preferably, the control system comprises:
the device comprises a trigger, a turbidity sensor, an electric control valve A and an electric control valve B;
wherein the trigger is in communication connection with the turbidity sensor;
the turbidity sensor is respectively in communication connection with the electric control valve A and the electric control valve B,
the electric control valve A is arranged at the joint of the vertical shaft and the rainwater pipe; the electric control valve B is arranged at the joint of the vertical shaft and the sewage pipe;
the trigger is arranged in the drainage tube and used as a starting switch of the control system;
the turbidity sensor is arranged at a water inlet of the sewage pipe and used for collecting rainwater turbidity parameters.
In the embodiment of the invention, after the trigger gate in the control system is pushed, the switch of the circuit control system is triggered; in order to avoid the trigger gate being repeatedly pushed, the circuit control system is triggered to be switched on and off for multiple times, and the circuit control system is set to be started again after 48 hours.
Preferably, the turbidity sensor is in particular:
the turbidity sensor comprises a turbidity sensor sub-device and a control sub-device, wherein the turbidity sensor sub-device is respectively in communication connection with a trigger and the control sub-device, and the control sub-device is respectively in communication connection with an electric control valve A and an electric control valve B.
Preferably, the control process of the control system is specifically as follows:
the method comprises the following steps that a turbidity sensor sub-device collects current rainwater turbidity data of a water inlet of a sewage pipe and transmits the current rainwater turbidity data to a control sub-device, the control sub-device receives the current rainwater turbidity data and judges whether preset rainwater turbidity is met, and if the preset rainwater turbidity is met, a first control signal is output and transmitted to an electric control valve A and an electric control valve B; otherwise, outputting a second control signal and transmitting the second control signal to the electric control valve A and the electric control valve B;
wherein; the first control signal is: closing the electric control valve A, and opening the electric control valve B;
the second control signal is: and the electric control valve A is opened, and the electric control valve B is closed.
In the embodiment of the invention, if the current rainwater turbidity data is more than or equal to the high concentration critical value (10NTU), the electric control valve B is opened, the electric control valve A is closed, and accumulated water is discharged into a sewage pipeline; if the current rainwater turbidity data is less than the high-concentration critical value (10NTU), the electric control valve A is opened, the electric control valve B is closed, and accumulated water is drained from a rainwater pipeline; the method also comprises a judgment standard that: if the current rainwater turbidity data is smaller than the low concentration critical value (3NTU), the electric control valve A is kept opened, the electric control valve B is kept closed, and the circuit control system is closed;
in the embodiment of the invention, after rainwater enters the main pipe, the backwater ridge intercepts and flows the rainwater in the former stage into the drainage pipe, when the water level of the rainwater accumulated in the drainage pipe reaches the preset triggering height, the weight of the rainwater can push the trigger gate, and after the trigger gate is pushed, a circuit control system for controlling the turbidity sensor and the electric control valve is started; when rainwater needs to be accumulated to a certain water level, enough weight can be reached to push the trigger gate, so that the condition that a small amount of water enters the drainage tube due to other reasons to cause the trigger gate to be misjudged, such as artificially dumped water, watering of a watering cart and the like, is eliminated;
if the rainfall does not substantially occur, but the water in the drainage tube is accumulated to a sufficient height to push the trigger gate, the circuit control system is started, the turbidity of the accumulated water can be detected after the turbidity sensor in the three-way pipe works, the system makes a corresponding judgment, and the accumulated water in the drainage tube is drained at the moment; after the accumulated water is removed, because no water flow exists in the pipeline, the turbidity value detected by the turbidity sensor is 0NTU and is lower than the preset low concentration value, and the system is closed.
Preferably, a force eliminating threshold is arranged at the front end of the turbidity sensor; the absorption threshold is used for forming a low-flow-rate backflow area at the downstream, and the loss of the turbidity sensor is reduced.
In the embodiment of the invention, the lower-stream low-flow-rate backflow area formed by the absorption sill can well protect the turbidity sensor, prevent water flow from washing away the turbidity sensor, reduce the loss of the turbidity sensor and prolong the service life of equipment.
Preferably, a first acceleration ramp is arranged at the confluence position of the drainage pipe and the main pipe;
and a second accelerating ramp is arranged at the joint of the three-way pipe and the rainwater pipe.
In the embodiment of the invention, after the trigger gate is opened, the water flow in the drainage pipe is converged into the main pipe again and enters the accelerating ramp 1. The acceleration ramp 1 can fully accelerate the water flow before entering the curve, so that the water flow at the turning curve can generate a more obvious curve circulation phenomenon, the curve circulation phenomenon is shown in fig. 3, and the curve circulation phenomenon refers to a special motion state that the surface water flow in the curve flows to the concave bank and the bottom water flow flows to the convex bank, namely, a special three-dimensional spiral flow motion of the curve. In the water flow of the curve, the flow velocity of the water flow on the surface layer is greater than that of the water flow on the bottom layer, and the centrifugal force applied to the water flow on the surface layer is greater than that applied to the water flow on the bottom layer, so that the water flow on the surface layer flows to the concave bank under the action of the centrifugal force; most pollutants are attached to large-particle objects (silt) to move along with water flow, and the water has the characteristics of high bottom concentration and low surface layer concentration in the vertical direction of the water depth. Therefore, most of the solid particles adhering to the contaminants enter the banks along with the curved water flow.
The rear part of the turning bend is connected with a three-way pipe, the left side of the three-way pipe is connected with a rainwater pipe, and a sewage blocking weir is arranged in the three-way pipe; the right side is connected with a sewage pipe, and a force eliminating ridge and a turbidity sensor are arranged in the sewage pipe. Due to the circulation phenomenon of the curve, the distribution characteristic of high pollutant concentration at the bottom is superposed, the specific drop of the sewage pipe is larger (the acceleration ramp 2) and the elevation is lower, and the sewage weir at the rainwater pipe intercepts the water flow, so most of the initial rainwater with high pollution can be drained from the sewage pipe; in the later stage of rainfall, the concentration of pollutants is reduced, the electric control valve B is closed, and the electric control valve A is opened. Water flow is mainly discharged from a rainwater pipe on the left side of the three-way pipe, the inside of the sewage pipe on the right side is filled with water, and only a small amount of water overflows into the rainwater pipe through the vertical shaft and is discharged.
As shown in fig. 4, the geometric parameters of the rainwater interception system in the embodiment of the present invention are set as follows:
d is the diameter of the pipeline, and the unit is meter.
L + d is the horizontal distance from the backwater bank to the trigger gate, d is the horizontal distance from the front slope starting position of the trigger gate to the trigger gate, and d is 2/3L with the unit of meter;
h is the trigger water level of the trigger, and the unit is meter;
h0 is the height of the backwater threshold in meters; the height of the water retaining bank is designed to ensure that water accumulated before the trigger is triggered does not overflow the water retaining bank;
h1 is the height of the front slope of the trigger gate in meters; and, the trigger water level of trigger gate is according to the rainfall condition setting in place: if the average rainfall of local rainfall over the years is small, the trigger water level can be properly reduced so as to ensure that enough water can be accumulated in front of a trigger gate to push the trigger when the rainfall occurs;
h2 is the height of the trash weir, and the unit is meter; the height of the trash weir is designed to ensure that the trash weir can intercept most of water flow when the water flow is small and can not form obvious circular flow of a curve, so that the water flow flows into a sewage pipe;
h3 is the height of the stillness threshold in meters;
the critical value of the turbidity sensor is set and is determined according to the local actual condition, wherein the high concentration value can be selected by referring to the standard of sewage treatment, and the turbidity value of the sewage to be treated can be selected as the high concentration value; the selection of the low concentration value can be determined according to the turbidity of rainwater in the later period of local rainfall or the drinking water standard;
example 1 for the geometric parameter set was:
the pipe diameter D of the pipeline is 1 meter, the height of the backwater bank is 0.05 meter, the horizontal distance from the backwater bank to the trigger gate is 20 meters, the horizontal distance from the accelerating ramp to the trigger gate is 8 meters, the gradient i of the accelerating ramp is set to be 1:50, the height h1 of the front slope of the trigger gate is 0.16 meter, the trigger gate can be opened when the gravity of water reaches 1000N, when the water level of the water accumulated in front of the trigger gate reaches 0.12 meter, the horizontal distance of the water surface can be calculated according to the gradient of the pipeline to be 6 meters, and the method specifically comprises the following steps of: v ═ H/3 ═ S1+ S2+ (S1 ^ S2) ^ 0.5); according to a formula, the volume of the water in the pipeline is 0.1063 cubic meters at the moment, the gravity of the water reaches 1042N, and the standard that the trigger gate is triggered is met. The height of the absorption ridge is 0.06 meter; the height of the trash weir is 0.20 m; according to the sewage treatment standard and the drinking water standard, 10NTU is set as a high concentration value of the turbidity sensor, and 3NTU is set as a low concentration value of the turbidity sensor.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (6)
1. A rainwater shutoff system, comprising:
control system and
the backwater bank, the main pipe, the drainage pipe communicated with the main pipe in parallel, the turning elbow communicated with the main pipe in series, and the rainwater pipe and the sewage pipe communicated with the turning elbow through the three-way pipe;
wherein, the water outlet of the sewage pipe is communicated with the water outlet of the rainwater pipe through a vertical shaft;
the backwater bank is arranged on the main pipe.
2. A rainwater interception system according to claim 1, characterized in that said control system comprises:
the device comprises a trigger, a turbidity sensor, an electric control valve A and an electric control valve B;
wherein the trigger is in communication connection with the turbidity sensor;
the turbidity sensor is respectively in communication connection with the electric control valve A and the electric control valve B,
the electric control valve A is arranged at the joint of the vertical shaft and the rainwater pipe; the electric control valve B is arranged at the joint of the vertical shaft and the sewage pipe;
the trigger is arranged in the drainage tube and used as a starting switch of the control system;
the turbidity sensor is arranged at a water inlet of the sewage pipe and used for collecting rainwater turbidity parameters.
3. A rainwater interception system according to claim 2, characterized in that said turbidity sensor is in particular:
the turbidity sensor comprises a turbidity sensor sub-device and a control sub-device, wherein the turbidity sensor sub-device is respectively in communication connection with a trigger and the control sub-device, and the control sub-device is respectively in communication connection with an electric control valve A and an electric control valve B.
4. A rainwater interception system according to claim 3, characterized in that the control process of the control system is specifically:
the method comprises the following steps that a turbidity sensor sub-device collects current rainwater turbidity data of a water inlet of a sewage pipe and transmits the current rainwater turbidity data to a control sub-device, the control sub-device receives the current rainwater turbidity data and judges whether preset rainwater turbidity is met, and if the preset rainwater turbidity is met, a first control signal is output and transmitted to an electric control valve A and an electric control valve B; otherwise, outputting a second control signal and transmitting the second control signal to the electric control valve A and the electric control valve B;
wherein; the first control signal is: closing the electric control valve A, and opening the electric control valve B;
the second control signal is: and the electric control valve A is opened, and the electric control valve B is closed.
5. A rainwater interception system according to claim 2, characterized in that a force-reducing ridge is provided at the front end of the turbidity sensor; the absorption ridge is used for forming a low-flow-rate backflow area at the downstream, and the loss of the turbidity sensor is reduced.
6. A rainwater interception system according to claim 1, characterized in that a first acceleration ramp is provided at the confluence of the drainage pipe and the trunk pipe;
and a second acceleration ramp is arranged at the joint of the three-way pipe and the rainwater pipe.
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