CN117738303A - System and method for mixing and draining rain sewage - Google Patents

Abstract

The invention discloses a rain sewage mixing and draining system and a rain sewage mixing and draining method, wherein the mixing and draining system comprises intelligent control equipment, a sewage collecting box, a main water pump, an auxiliary water pump, a water quality detection sensor, a liquid level detection sensor, a rain water detection sensor, a sewage treatment plant, a rain sewage pipeline, a river channel and a cloud service control end, the sunny day or the rainy day is judged according to the detection data of the rain water detection sensor, the intelligent control equipment is switched on and off to control the sewage flow in the sewage collecting box according to the water level of sewage in the sewage collecting box detected by the liquid level sensor in sunny weather, and the intelligent control equipment is switched on and off to control the sewage flow in the sewage collecting box according to the detection data of the water quality detection sensor in rainy weather. The invention can intelligently extract or discharge the sewage by automatically monitoring and detecting the sewage on the rain and sewage pipeline, thereby greatly reducing the direct discharge of the sewage into the river channel and effectively treating the black and odorous phenomenon of the urban river channel.

Description

System and method for mixing and draining rain sewage

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a rain sewage mixed drainage system and a rain sewage mixed drainage method.

Background

In urban drainage systems, the realization of quality-division of rain sewage is an important measure for improving sewage collection capacity and protecting water environment. The urban drainage system mainly comprises a drainage pipe network and a sewage treatment plant, under the condition of realizing rainwater and sewage diversion, drainage household sewage is collected and conveyed to the municipal sewage pipe network by a drainage unit sewage pipe network and then is conveyed to the sewage treatment plant for centralized treatment, the sewage is discharged into river water nearby after reaching the treatment standard, and rainwater is collected by the rainwater pipe network and is directly discharged into nearby water from a rainwater discharge port.

However, in urban construction in China, due to historical reasons, areas such as old communities, villages in cities, urban and rural joints and the like do not have the condition of thoroughly diversion and reconstruction of rainwater and sewage at present. In addition, some early community drainage units adopting diversion system cause rain and sewage series flow due to artificial interference, irregular construction reconstruction, pipe network leakage and other reasons. In order to reduce the pollution of the mixed sewage to the water environment, the urban rain sewage drainage system is arranged at the water inlet and the water outlet of the river and the lake, the mixed sewage in the rain water pipeline is intercepted to the sewage pipeline, and is discharged after being treated by the sewage system, so that the method has important effects of improving the sewage collection rate, improving the regional water environment quality and realizing zero and direct drainage of sewage.

Disclosure of Invention

The invention aims to solve one of the technical problems, and provides a rainwater and sewage mixed drainage system and a rainwater and sewage mixed drainage method, which can intelligently extract or drain sewage by automatically monitoring and detecting the sewage on a rainwater and sewage pipeline, greatly reduce the phenomenon that the sewage is directly discharged into a river channel, and effectively treat black and odorous in the urban river channel.

In order to solve the technical problems, the invention provides the following technical scheme: the rainwater and sewage mixed drainage system comprises a sewage treatment plant, a rainwater and sewage pipeline, a river channel, intelligent control equipment, a sewage collecting box, a plurality of water pumps, a plurality of water quality detection sensors, a liquid level detection sensor and a rainwater detection sensor, wherein the sewage collecting box comprises a sewage inlet and a sewage outlet, and the water pumps comprise a main water pump and an auxiliary water pump;

the sewage inlet and the sewage outlet are arranged on different sides of the sewage collecting box, and the sewage inlet is lower than the sewage outlet in the height of the horizontal plane; the sewage inlet is connected with a rain sewage pipeline, and the sewage outlet is connected with a river channel;

the main water pump and the auxiliary water pump are fixedly arranged at the bottom in the sewage collection box and are connected with a sewage treatment plant through the same sewage conveying pipeline, and the main water pump and the auxiliary water pump are electrically connected with the intelligent control equipment;

The sewage collecting box is fixed on the top of the sewage collecting box or on the ground beside the sewage collecting box;

the water quality detection sensor and the liquid level detection sensor are placed in the sewage collection box and are electrically connected with the intelligent control equipment; the rainwater detection sensor is arranged on the ground beside the sewage collection box or on the top of the intelligent control equipment and is electrically connected with the intelligent control equipment;

the water quality detection sensor is used for detecting water quality data of sewage in the sewage collecting box, the liquid level detection sensor is used for detecting water level data of the sewage in the sewage collecting box, and the rainwater detection sensor is used for detecting whether the place where the sewage collecting box is located is in a raining state or not;

the intelligent control equipment is used for setting a water quality data threshold, starting a water pump liquid level threshold and closing the water pump liquid level threshold;

when the rainwater detection sensor detects that the place where the sewage collection box is located is in a rainwater-free state and the liquid level detection sensor detects that the water level of sewage in the sewage collection box exceeds the liquid level threshold of the water pump, the intelligent control equipment is used for starting the main water pump or the auxiliary water pump, the main water pump or the auxiliary water pump is used for pumping sewage in the sewage collection box and conveying the sewage to the sewage treatment plant until the water level of the sewage in the sewage collection box is lower than the liquid level threshold of the water pump, and the intelligent control equipment is used for closing the main water pump or the auxiliary water pump in operation;

The intelligent control equipment is used for setting the single-time starting time length of the main water pump and the auxiliary water pump, and is used for controlling the main water pump and the auxiliary water pump to be used alternately in the sewage pumping process;

when the rainwater detection sensor detects that the ground where the sewage collection box is located is in a raining state, the intelligent control device is also used for starting the main water pump or the auxiliary water pump to pump sewage in the sewage collection box and convey the sewage to a sewage treatment plant in the period of initial rain;

after the period of the initial rain period, if the rainwater detection sensor detects that the place where the sewage collection box is located is in a raining state continuously, the water quality detection sensor is used for detecting whether water quality data of sewage in the sewage collection box is larger than a sewage threshold value, if the water quality data is smaller than the sewage threshold value, the intelligent control device is used for closing a main water pump or an auxiliary water pump in operation, and the sewage in the sewage collection box is gradually increased until the sewage is discharged from a sewage outlet of the sewage collection box to a river channel; if the water quality data is greater than or equal to the sewage threshold, the intelligent control device is used for continuously operating the main water pump or the auxiliary water pump, and alternately using the main water pump and the auxiliary water pump according to the single opening time until the water quality data is smaller than the sewage threshold, and then closing the main water pump or the auxiliary water pump in operation.

Further, the system for mixing and draining the rain sewage further comprises a cloud service control end, the intelligent control equipment is connected with the cloud service control end through wired communication or wireless communication, the intelligent control equipment is further used for sending detection data of the water quality detection sensor, the liquid level detection sensor and the rain water detection sensor to the cloud service control end, and the cloud service control end displays the detection data;

the intelligent control equipment is also used for monitoring the running states of the main water pump and the auxiliary water pump in real time, and if one of the main water pump or the auxiliary water pump cannot run, the intelligent control equipment can only control the running water pump to pump sewage in the sewage collecting box, and the alternate use of the water pumps is stopped;

the intelligent control equipment is also used for sending the condition that the main water pump and the auxiliary water pump cannot operate to the cloud service control end, and the cloud service control end is also used for carrying out alarm display on the water pump which cannot operate.

Further, the rain sewage mixed drainage system further comprises a direct drainage pump, wherein the direct drainage pump is connected with a sewage treatment plant through a sewage conveying pipeline, and the direct drainage pump is electrically connected with the intelligent control equipment;

The cloud service control end is further used for receiving weather forecast information pushed by the local weather platform, if the cloud service control end receives weather forecast information of extreme weather encountered by the place where the sewage collecting box is located after a plurality of hours in the future, the cloud service control end is used for sending an operation instruction of the direct drainage pump to the intelligent control equipment, the intelligent control equipment starts the direct drainage pump after receiving the operation instruction, and the direct drainage pump is used for pumping sewage in the sewage collecting box and draining the sewage to a sewage treatment plant through a sewage conveying pipeline until the liquid level detection sensor detects that the water level data of the sewage in the sewage collecting box reaches a standard value.

Further, the sewage treatment plant is used for monitoring the sewage treatment state of the sewage treatment plant in real time, if the sewage treatment plant knows that the sewage treatment plant is overloaded, the sewage treatment plant is used for sending a sewage conveying stopping instruction to each intelligent control device, commanding the intelligent control device to stop continuously conveying sewage to the sewage treatment plant, and after receiving the sewage conveying stopping instruction, the intelligent control device turns off the main water pump and the auxiliary water pump and stops conveying the sewage to the sewage treatment plant.

Further, the rain sewage mixing and draining system further comprises a plurality of auxiliary sewage collecting boxes and a plurality of sewage draining branch pipelines, wherein a sewage pumping pump and an auxiliary liquid level detection sensor are fixedly arranged at the bottom in each auxiliary sewage collecting box, each auxiliary sewage collecting box comprises a sewage input port and a sewage output port, the sewage input ports and the sewage output ports are arranged on different sides of each auxiliary sewage collecting box, and the level of the sewage input ports is lower than that of the sewage output ports;

the outer side edge of the bottom of the sewage collection box is provided with a plurality of sewage inlet branch pipes; the sewage inlet is connected with a sewage branch pipeline, the sewage outlet is connected with a river channel, the sewage pump is connected with a sewage inlet branch pipe of the sewage collecting box through a water pipe, and the intelligent control equipment is electrically connected with the sewage pump and the auxiliary liquid level detection sensor;

the auxiliary liquid level detection sensor is used for detecting the water level data of sewage in the auxiliary sewage collecting box, and the intelligent control equipment is also used for setting a liquid level threshold value of the sewage pump to be opened and a liquid level threshold value of the sewage pump to be closed; when the auxiliary liquid level detection sensor detects that the water level data of the sewage in the auxiliary sewage collecting box exceeds the liquid level threshold of the sewage pump, the intelligent control device is used for starting the sewage pump to pump the sewage in the auxiliary sewage collecting box until the water level data of the sewage in the auxiliary sewage collecting box is lower than the liquid level threshold of the sewage pump, and the intelligent control device is used for closing the sewage pump;

After the period of the initial rain period, if the rainwater detection sensor detects that the place where the sewage collection box is located is in a raining state continuously, and the water quality data is smaller than the sewage threshold value, the intelligent control equipment is used for closing the main water pump or the auxiliary water pump in operation, and simultaneously, the intelligent control equipment is also used for closing the sewage pumping pump of the auxiliary sewage collection box, and sewage in the auxiliary sewage collection box is gradually increased until the sewage is discharged from the sewage output port to the river channel;

if the cloud service control end receives weather forecast information of extreme weather of the place where the sewage collecting box is located after a plurality of hours in the future, the cloud service control end is used for sending an operation instruction of the direct drainage pump to the intelligent control equipment, the intelligent control equipment starts the direct drainage pump after receiving the operation instruction, and simultaneously starts the sewage pumping pump of the sewage collecting box to pump sewage in the auxiliary sewage collecting box until the auxiliary liquid level detection sensor detects that the water level data of the sewage in the auxiliary sewage collecting box reaches a set value, and the intelligent control equipment closes the sewage pumping pump.

Further, for the main water pump, the auxiliary water pump and the direct-discharge water pump, the discharge flow rate thereof is as followsThe following calculation formula is satisfied:

in the above-mentioned method, the step of,is designed to be the flow rate of the rain and sewage pipeline, To select the number of water pumps;

in the above, isThe measured flow of the rain and sewage pipeline under the condition of sunny day,is a coefficient;

in the above-mentioned method, the step of,in order to determine the number of times,is the firstThe volume of sewage in the sewage collecting box is measured for the second time,is the firstCollection time for secondary measurement;

according to the discharge flowAcquiring effective volume of sewage collection box:

In the method, in the process of the invention,is the maximum start-stop frequency of the water pump per hour.

Another object of the present invention is to provide a method for mixing and draining sewage, which is operated on the above-mentioned system for mixing and draining sewage, and includes the following steps:

s1, detecting water quality data of sewage in a sewage collecting box in real time by a water quality detection sensor, detecting water level data of the sewage in the sewage collecting box in real time by a liquid level detection sensor, detecting whether a place where the sewage collecting box is located is in a rainy state or not in real time by a rainwater detection sensor, receiving detection data of the water quality detection sensor, the liquid level detection sensor and the rainwater detection sensor by intelligent control equipment, and sending the detection data to a cloud service control end;

s2, when the rainwater detection sensor detects that the place where the sewage collection box is located is in a rainwater-free state, and when the liquid level detection sensor detects that the water level of sewage in the sewage collection box exceeds the water level threshold of the water pump, the intelligent control equipment starts the main water pump or the auxiliary water pump to pump the sewage in the sewage collection box and convey the sewage to the sewage treatment plant, and when the water level of the sewage in the sewage collection box is lower than the water level threshold of the water pump, the main water pump or the auxiliary water pump which is in operation is closed to stop pumping the sewage; in the sewage pumping process, the main water pump and the auxiliary water pump are alternately used;

S3, when the rainwater detection sensor detects that the ground where the sewage collection box is located is in a rainy state, the intelligent control device starts the main water pump or the auxiliary water pump in a period of initial rain to pump sewage in the sewage collection box and convey the sewage to a sewage treatment plant;

s4, after the period of the initial rain period, if the rainwater detection sensor detects that the place where the sewage collection box is located is in a raining state continuously, the water quality detection sensor detects whether the water quality data of sewage in the sewage collection box is larger than a sewage threshold value; if the water quality data is smaller than the sewage threshold value, the intelligent control equipment turns off the main water pump or the auxiliary water pump in operation, and the sewage in the sewage collecting box is gradually increased until the sewage is discharged to a river channel from a sewage outlet of the sewage collecting box;

if the water quality data is greater than or equal to the sewage threshold, the intelligent control equipment continues to operate the main water pump or the auxiliary water pump, and alternately uses the main water pump and the auxiliary water pump according to the single starting time until the water quality data is smaller than the sewage threshold, and then the main water pump or the auxiliary water pump in operation is closed;

and after the period of the initial rain period, if the rainwater detection sensor detects that the place where the sewage collection box is located is in a non-rain state, the main water pump or the auxiliary water pump in operation is turned off, and the step S2 is returned.

Further, the step S1 further includes: the secondary liquid level detection sensor detects the water level data of the sewage in the secondary sewage collecting box in real time;

the step S2 further includes: when the rainwater detection sensor detects that the place where the sewage collection box is located is in a rainwater-free state, and the auxiliary liquid level detection sensor detects that the water level data of sewage in the auxiliary sewage collection box exceeds the liquid level threshold of the sewage pump which is started, the intelligent control equipment starts the sewage pump to pump the sewage in the auxiliary sewage collection box until the water level data of the sewage in the auxiliary sewage collection box is lower than the liquid level threshold of the sewage pump which is closed, and the intelligent control equipment closes the sewage pump;

in the step S4, if the water quality data is smaller than the sewage threshold, the intelligent control device turns off the main water pump or the auxiliary water pump in operation, the sewage in the sewage collecting tank gradually increases until the sewage is discharged from the sewage outlet of the sewage collecting tank to the river channel, and simultaneously, the intelligent control device turns off the sewage pumping pump of the auxiliary sewage collecting tank, and the sewage in the auxiliary sewage collecting tank gradually increases until the sewage is discharged from the sewage outlet to the river channel.

Further, in the implementation process of steps S1 to S4, if one of the main water pump or the auxiliary water pump fails, the intelligent control device only controls the water pump which can be operated, the alternate use of the main water pump and the auxiliary water pump is stopped, the intelligent control device sends the condition that one of the water pumps cannot be operated to the cloud service control end, and the cloud service control end alarms and displays the water pump which cannot be operated.

Further, in the implementation process of the steps S1-S4, if the local weather platform pushes weather prediction information of extreme weather to be encountered by the place where the sewage collecting box is located after a plurality of hours in the future to the cloud service control end, the cloud service control end sends an operation instruction of the direct drainage pump to the intelligent control equipment, the intelligent control equipment starts the direct drainage pump and the sewage pump after receiving the operation instruction, the direct drainage pump pumps sewage in the sewage collecting box and discharges the sewage to the sewage treatment plant until the liquid level detection sensor detects that the water level data of the sewage in the sewage collecting box reaches a standard value, and the intelligent control equipment turns off the direct drainage pump; the sewage pump pumps sewage in the auxiliary sewage collecting box until the auxiliary liquid level detection sensor detects that the water level data of the sewage in the auxiliary sewage collecting box reaches a set value, and the intelligent control equipment closes the sewage pump.

After the technical scheme is adopted, the invention has at least the following beneficial effects:

1. according to the invention, the main water pump and the auxiliary water pump are alternately used, so that the water pump can be effectively protected, and the service life of the water pump is prolonged;

2. according to the invention, the main water pump and the auxiliary water pump are arranged, so that the operation of the whole mixed drainage system is not influenced under the condition that one water pump fails, and the cloud service control end is used for carrying out alarm display, so that a worker can replace the failed water pump in time;

3. According to the invention, through specific calculation, the correct water pump can be optimally selected, and under the condition of ensuring the sufficient running efficiency of the water pump, the water pump with higher power or higher water discharge can be avoided to consume more electric quantity, so that the cost is effectively saved;

4. according to the invention, through automatic monitoring and detection of sewage on the rain and sewage pipeline, the sewage can be intelligently extracted or discharged, so that the sewage is greatly reduced from being directly discharged into a river channel, and the black and odorous phenomenon of the urban river channel is effectively treated;

5. according to the invention, the sewage treatment state of the sewage treatment plant is monitored in real time, so that overload work of the sewage treatment plant is avoided, and the safety of the sewage treatment plant is seriously damaged;

6. according to the invention, before extreme weather occurs, all accumulated sewage in all rain and sewage pipelines is pumped away, so that the occurrence probability of urban waterlogging caused by extreme weather is greatly reduced, and the safety of cities and residents is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a mixing system according to the present invention.

Fig. 2 is a schematic perspective view of a sewage collection tank according to the present invention.

FIG. 3 is a schematic view of the structure of the secondary sewage collection tank of the invention.

Detailed Description

It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other, and the present application will be further described in detail with reference to the drawings and the specific embodiments.

As shown in fig. 1 and 2, the first embodiment discloses a rainwater and sewage mixing and draining system, which comprises an intelligent control device 1, a sewage collecting box 2, a plurality of water pumps 3, a plurality of water quality detection sensors 4, a liquid level detection sensor 5, a rainwater detection sensor 6, a sewage treatment plant 7, a rainwater and sewage pipeline 8, a river 9 and a cloud service control end 10, wherein the sewage collecting box 2 comprises a sewage inlet 21 and a sewage outlet 22, the sewage inlet 21 and the sewage outlet 22 are arranged on the side surface of the sewage collecting box 2, the sewage inlet 21 and the sewage outlet 22 are positioned on different side surfaces of the sewage collecting box 2, the sewage inlet 21 is lower than the sewage outlet 22 in the horizontal plane height, and the water pump 3 comprises a main water pump 31, an auxiliary water pump 32 and a direct drainage pump 33.

The sewage inlet 21 of the sewage collecting box 2 is connected with the rain sewage pipeline 8, and the sewage outlet 22 is connected with the river 9. Specifically, the sewage collecting box 2 is fixed by adopting a buried type or wall-mounted type, for the buried type, a deep well is dug between the rain and sewage pipelines 8 connected with the river channel 9, the sewage collecting box 2 is placed into the deep well to be buried deeply, the rain and sewage pipelines 8 are directly connected with the sewage inlet 21, and the sewage inlet 21 is connected with the river channel 9 through the pipelines; for wall hanging, the sewage collecting box 2 is directly fixed on the river dike side of the river channel 9, the sewage outlet 22 is directly opposite to the river channel 9, and the rain and sewage pipeline 8 is directly connected with the sewage inlet 21.

The main water pump 31, the auxiliary water pump 32 and the direct-discharge water pump 33 are fixedly arranged at the inner bottom of the sewage collecting box 2, the main water pump 31, the auxiliary water pump 32 and the direct-discharge water pump 33 are connected with the sewage treatment plant 7 through the same sewage conveying pipeline, and the direct-discharge water pump 33 is connected with the river 9 through a water pipe. The main water pump 31, the auxiliary water pump 32 and the direct-discharge water pump 33 are all electrically connected with the intelligent control device 1.

The main water pump 31, the auxiliary water pump 32 and the direct-discharge water pump 33 are all used for pumping the sewage in the sewage collecting tank 2 and conveying the sewage to the sewage treatment plant 7 through a sewage conveying pipeline, and the sewage treatment plant 7 is used for purifying the received sewage.

The sewage collection tank 2 is fixed on top of the sewage collection tank 2 or on the ground beside the sewage collection tank 2.

The water quality detection sensor 4 and the liquid level detection sensor 5 are placed in the sewage collection box 2 and are electrically connected with the intelligent control device 1. The water quality detection sensor 4 is used for detecting water quality data of sewage in the sewage collecting box 2, and the liquid level detection sensor 5 is used for detecting water level data of the sewage in the sewage collecting box 2.

The water quality detection sensor 4 is one or more of a flow direction detection sensor, a water temperature detection sensor, a conductivity detection sensor, a TDS detection sensor, a salinity detection sensor, a water pressure detection sensor and an ammonia nitrogen sensor.

The rainwater detection sensor 6 is arranged on the ground beside the sewage collection box 2 or on top of the intelligent control device 1, and is electrically connected with the intelligent control device 1. The rainwater detection sensor 6 is used for detecting whether the place where the sewage collection tank 2 is located is in a rainy state.

The intelligent control device 1 is connected to the cloud service control terminal 10 through wired communication or wireless communication, and the wireless communication is one or more of 2G communication, 3G communication, 4G communication and 5G communication. The intelligent control device 1 is configured to include: the system is used for controlling the operation of the main water pump 31, the auxiliary water pump 32 and the direct drainage water pump 33, and is used for receiving detection data of the water quality detection sensor 4, the liquid level detection sensor 5 and the rainwater detection sensor 6 and sending the detection data to the cloud service control end 10, and the cloud service control end 10 displays the detection data.

The intelligent control equipment 1 is also used for setting a water quality data threshold value, a water pump liquid level threshold value starting and a water pump liquid level threshold value closing;

the liquid level detection sensor 5 is used for detecting the water level data of the sewage in the sewage collection tank 2, under the condition of sunny days (the rainwater detection sensor 6 detects that the place where the sewage collection tank 2 is located is in a non-rainy state), when the liquid level detection sensor 5 detects that the water level of the sewage in the sewage collection tank 2 exceeds the threshold value for starting the water pump liquid level, the intelligent control device 1 is used for starting the main water pump 31 or the auxiliary water pump 32, the main water pump 31 or the auxiliary water pump 32 pumps the sewage in the sewage collection tank 2 and conveys the sewage to the sewage treatment plant 7, in the sewage pumping process, if the sewage flow is excessive and the single water pump pumping time is too long, the main water pump 31 and the auxiliary water pump 32 are needed to be alternately used, and the main water pump 31 and the auxiliary water pump 32 pump alternately pump the sewage in the sewage collection tank 2;

The intelligent control device 1 is configured to set a single-turn-on duration of the main water pump 31 and the auxiliary water pump 32, preferably, the single-turn-on duration is set to 15 minutes, that is, if after the main water pump 31 is turned on for 15 minutes, when the water level of the sewage in the sewage collection tank 2 is not lower than the water level threshold of the closed water pump, the auxiliary water pump 32 is turned on while the main water pump 31 is turned off, and after the auxiliary water pump 32 is operated for 15 minutes, the water level of the sewage in the sewage collection tank 2 is still not lower than the water level threshold of the closed water pump, the auxiliary water pump 32 is turned off while the main water pump 31 is turned on, so that circulation is performed until the water level of the sewage in the sewage collection tank 2 is lower than the water level threshold of the closed water pump;

when the liquid level detection sensor 5 detects that the water level of the sewage in the sewage collection tank 2 is lower than the water-shut-off liquid level threshold, the main water pump 31 or the sub water pump 32 in operation is shut off. In this embodiment, the main water pump 31 or the sub water pump 32 is used alternately, so that the water pump can be effectively protected, and the service life of the water pump can be prolonged.

When the rainwater detection sensor 6 detects that the ground where the sewage collection tank 2 is located is in a raining state, the intelligent control device 1 starts the main water pump 31 or the auxiliary water pump 32 to pump sewage in the sewage collection tank 2 and convey the sewage to the sewage treatment plant 7 in the period of the initial rain period; after the period of the initial rain period, if the rainwater detection sensor 6 detects that the place where the sewage collection tank 2 is located is in a non-rain state, the intelligent control device 1 turns off the main water pump 31 or the auxiliary water pump 32 in operation;

After the period of the initial rain period, if the rainwater detection sensor 6 detects that the place where the sewage collection tank 2 is located is in a raining state continuously, the water quality detection sensor 4 is used for detecting whether the water quality data of the sewage in the sewage collection tank 2 is larger than a sewage threshold value, if the water quality data is smaller than the sewage threshold value, the intelligent control device 1 turns off the main water pump 31 or the auxiliary water pump 32 in operation, and the sewage in the sewage collection tank 2 is gradually increased until the sewage is discharged from the sewage outlet 22 of the sewage collection tank 2 to the river 9; if the water quality data is greater than or equal to the sewage threshold, the intelligent control device 1 continues to operate the main water pump 31 or the auxiliary water pump 32, and alternately uses the main water pump 31 and the auxiliary water pump 32 according to the single opening time until the water quality data is smaller than the sewage threshold, and then the main water pump 31 or the auxiliary water pump 32 in operation is closed.

Preferably, the period of the initial rain period is set to 15 minutes.

Preferably, the water quality detection sensor 4 adopts a TDS detection sensor, and the sewage threshold value is TDS threshold value=150mg/L.

The embodiment can automatically start the water pump to pump sewage in the period of the initial rain period, and avoid sewage from entering the river channel 9. Normally, a large amount of pollutants are accumulated on the ground surface in sunny days, the pollutants are taken away by rainwater in the early rain stage, and the rainwater flowing into the rainwater and sewage pipeline 8 is dirty and exceeds the TDS threshold value, so that the water pump is required to be directly started for pumping, and the rainwater is prevented from being discharged into the river 9 from the sewage outlet 22 of the sewage collecting box 2 after being converged. During the period of rain (from the early rain period to the rain stop period), as the surface is flushed by the rainwater in the earlier period, the pollutants are taken away, and the rainwater flowing into the rainwater and sewage pipeline 8 in the rain period is quite clean, so that the rainwater is not required to be extracted, the rainwater can be directly discharged from the sewage outlet 22 of the sewage collecting box 2 to the river channel 9, and the clean rainwater is directly discharged to the river channel 9 without being extracted to a sewage plant, thereby greatly reducing the cost and the sewage treatment flow of the sewage plant. This embodiment is through automatic monitoring and detect the sewage on the dirty pipeline of rain, can extract or discharge sewage intelligently, and greatly reduced sewage directly in the row enters the river course, thereby effectively administer the black and odorous phenomenon in city river course, thereby practiced thrift the electric energy through intelligent control water pump, and use in turn the water pump, delayed the life-span of water pump greatly.

In this embodiment, the intelligent control device 1 is configured to monitor the operation states of the main water pump 31 and the auxiliary water pump 32 in real time, and if one of the main water pump 31 and the auxiliary water pump 32 cannot operate (the water pump fails), the intelligent control device 1 can only control the operable water pump to pump the sewage in the sewage collecting tank 2, and stop the alternate use of the water pump. The intelligent control device 1 sends the condition that one of the water pumps cannot operate to the cloud service control end 10, and the cloud service control end 10 carries out alarm display on the water pump which cannot operate.

Preferably, in this embodiment, the height of the lowest position of the sewage outlet 22 may be set to 95 cm, that is, the distance between the lowest position of the sewage outlet 22 and the bottom of the sewage collecting tank 2 is 95 inside; the threshold value of the liquid level of the water pump can be set to be 20 cm, namely when the water level of the sewage in the sewage collecting box 2 is higher than 20 cm, the intelligent control device 1 starts the main water pump 31 or the auxiliary water pump 32; the water pump liquid level closing threshold value can be set to be 5 cm, namely, when the water level of sewage in the sewage collecting tank 2 is lower than 5 cm, the intelligent control device 1 turns off the main water pump 31 or the auxiliary water pump 32. In practical applications, since there is a difference in the specifications of the respective sewage collection tanks 2 or a difference in the aperture of the respective rain and sewage pipes 8, the height of the lowest position of the sewage outlet 22 provided in each sewage collection tank 2, the threshold value of the water pump on level, and the threshold value of the water pump off level may be different.

Since each sewage collection tank 2 connected to the sewage treatment plant 7 delivers sewage in a large amount and for a long time in continuous rain, an overload condition occurs to the sewage treatment plant 7, and the sewage treatment plant 7 cannot store a large amount of sewage. Therefore, the sewage treatment plant 7 is configured to monitor its own sewage treatment status in real time, and if the sewage treatment plant 7 knows that it has already been overloaded and cannot continuously receive a large amount of sewage, a sewage delivery stopping instruction will be sent to each intelligent control device 1, and instruct the intelligent control device 1 to stop delivering sewage to the sewage treatment plant 7, and after the intelligent control device 1 receives the sewage delivery stopping instruction, the main water pump 31, the auxiliary water pump 32 and the direct drainage pump 33 are turned off, and after the sewage delivery to the sewage treatment plant 7 is stopped, whether the sewage collection tank 2 continuously discharges sewage to the river 9 or not will be considered.

In order to cope with urban waterlogging caused by sudden severe weather, such as typhoon weather, continuous heavy storm weather and the like, all sewage in the city needs to be completely extracted in advance and conveyed to a sewage plant in advance, specifically: if the local weather platform pushes the future weather forecast of the extreme weather to the place where the sewage collecting box 2 is located for several hours (after 2 hours) to the cloud service control end 10, the management staff actively clicks a button for operating the direct-drainage pump 33 on the cloud service control end 10 according to his own judgment, the cloud service control end 10 is used for sending an operation instruction of the direct-drainage pump 33 to the intelligent control device 1, the intelligent control device 1 starts the direct-drainage pump 33 after receiving the operation instruction, the direct-drainage pump 33 pumps the sewage in the sewage collecting box 2 and discharges the sewage to the sewage treatment plant 7 through the sewage conveying pipeline, and the intelligent control device 1 turns off the direct-drainage pump 33 until the liquid level detection sensor 5 detects that the water level data of the sewage in the sewage collecting box 2 reaches a standard value. The in-line water pump 33 is turned on remotely only when typhoon weather or heavy storm is imminent, and is turned off in other cases. By arranging the direct-drainage pump 33, the sewage can be pre-warned in advance according to weather forecast of the weather table, so that the occurrence probability of urban waterlogging caused by bad weather is greatly reduced, and the safety of cities and residents is ensured. The specific calibration value needs to be determined according to the specific volume of the actual sewage collection tanks 2, and the specific volumes of each sewage collection tank 2 are not identical, so that the specific volumes are different.

Due to historical reasons of some communities and geographical environment factors, small sewage branch pipes exist near the rain and sewage pipeline 8, the small sewage branch pipes cannot directly converge with the rain and sewage pipeline 8, and the small sewage branch pipes directly discharge sewage into the river channel 9, so that the water environment of the river channel 9 is seriously polluted, and the sewage of the sewage branch pipes needs to be conveyed into the sewage collecting box 2.

The outer side edge of the bottom of the sewage collecting box 2 is provided with a plurality of sewage inlet branch pipes 23, the water level of a plurality of sewage branch pipes is higher than that of the sewage collecting box 2, the sewage branch pipes are directly connected with the sewage inlet branch pipes 23 through water pipes, and sewage in the sewage branch pipes flows into the sewage collecting box 2 through the sewage inlet branch pipes 23 under the action of gravity.

For a sewage branch pipe with a water level lower than that of the sewage collecting tank 2, the sewage mixing and discharging system of the rain sewage of the embodiment is further provided with a plurality of auxiliary sewage collecting tanks 11, as shown in fig. 3, the bottom in the auxiliary sewage collecting tanks 11 is fixedly provided with a sewage pumping pump 111 and an auxiliary liquid level detection sensor 112, the auxiliary sewage collecting tanks 11 comprise a sewage input port 113 and a sewage output port 114, the sewage input port 113 and the sewage output port 114 are arranged on the side surface of the auxiliary sewage collecting tanks 11, the sewage input port 113 and the sewage output port 114 are not positioned on the same side surface of the auxiliary sewage collecting tanks 11, and the level of the sewage input port 113 is lower than that of the sewage output port 114; likewise, the secondary sewage collecting box 11 is fixed by adopting a buried type or wall-mounted type; the sewage inlet 113 is connected with a sewage branch pipeline, and the sewage outlet 114 is connected with the river 9;

The sewage pump 111 is connected with the sewage inlet branch pipe 23 of the sewage collecting tank 2 through a water pipe, the intelligent control device 1 is electrically connected with the sewage pump 111 and the auxiliary liquid level detection sensor 112, the auxiliary liquid level detection sensor 112 is used for detecting water level data of sewage in the auxiliary sewage collecting tank 11, the intelligent control device 1 is also used for setting an opening sewage pump liquid level threshold value and a closing sewage pump liquid level threshold value, when the auxiliary liquid level detection sensor 112 detects that the water level data of sewage in the auxiliary sewage collecting tank 11 exceeds the opening sewage pump liquid level threshold value, the intelligent control device 1 opens the sewage pump 111 to pump the sewage in the auxiliary sewage collecting tank 11 until the water level data of sewage in the auxiliary sewage collecting tank 11 is lower than the closing sewage pump liquid level threshold value, and the intelligent control device 1 closes the sewage pump 111.

The specific values of the liquid level threshold of the sewage pump and the liquid level threshold of the sewage pump to be closed need to be determined according to the specification of each secondary sewage collecting tank 11, and the different specifications of the secondary sewage collecting tanks 11 exist.

After the period of the initial rain period, if the rainwater detection sensor 6 detects that the place where the sewage collection tank 2 is located is in a raining state continuously and the water quality data is smaller than the sewage threshold value, the intelligent control device 1 turns off the main water pump 31 or the auxiliary water pump 32 in operation, sewage in the sewage collection tank 2 gradually increases until the sewage is discharged from the sewage outlet 22 of the sewage collection tank 2 to the river 9, meanwhile, the intelligent control device 1 turns off the sewage pump 111 of the auxiliary sewage collection tank 11, and sewage in the auxiliary sewage collection tank 11 gradually increases until the sewage is discharged from the sewage outlet 114 to the river 9; in addition, if the sewage treatment plant 7 knows that the sewage treatment plant itself has been overloaded, a command for stopping sewage delivery will be generated to each intelligent control device 1, and the intelligent control device 1 will turn off the main water pump 31 and the auxiliary water pump 32, and also turn off the sewage pump 111 of the sewage collection tank 11.

Similarly, if the weather platform pushes the cloud service control end 10 for several hours in the future and then predicts the weather where the sewage collection tank 2 is located in bad weather, the cloud service control end 10 sends the operation instruction of the direct drainage pump 33 to the intelligent control device 1, the intelligent control device 1 starts the direct drainage pump 33 after receiving the operation instruction, and simultaneously starts the sewage pump 111 of the sewage collection tank 11 to pump the sewage in the auxiliary sewage collection tank 11 until the auxiliary liquid level detection sensor 112 detects that the water level data of the sewage in the auxiliary sewage collection tank 11 reaches the set value, and the intelligent control device 1 closes the sewage pump 111. Similarly, the specific set value needs to be determined according to the specific volume of the actual secondary sewage collection tank 11, and since the specific volume of each secondary sewage collection tank 11 is not the same, the specific set value will be different.

In this embodiment, by arranging the auxiliary sewage collection box 11 on each sewage branch pipe which cannot be directly connected with the rain and sewage pipe 8, the sewage of the sewage branch pipe can be prevented from being directly discharged into the river 9, and the water environment of the river is more effectively protected from being polluted.

In this embodiment, for the selection of the water pumps (the main water pump 31, the auxiliary water pump 32 and the direct-discharge water pump 33), the water pump according to the discharge flow is selected according to the measured flow of the rain and sewage pipeline 8 under the sunny condition;

Wherein the container method can be used for calculating the measured flow of the rain and sewage pipeline 8 under the condition of sunny daysMeasuring amountThe formula is:measuring flow rateIn cubic meters per hour (/ h),to determine the times [ (]Preferably 9, 3 days, 3 times/day, once each of the morning, noon and evening),is the firstThe volume of sewage in the sewage collection tank 2 measured for the second time is expressed in liters (L),is the firstThe collection time of the secondary measurement is given in seconds(s);

for measuring flow rateThe buoy method can be used for determining, equipment used in the buoy method preferably comprises a buoy, a tape and a stopwatch, the distance between the start point and the stop point of the buoy flow is preferably measured by the tape, the reading is preferably accurate to cm, the time of the buoy flow is preferably measured by the stopwatch, the measuring times are preferably 9 times, and the measuring times are calculated according to the following formula:

in the above-mentioned method, the step of,for the measurement times, 3 days, 3 times/day, and one time in the morning, in the middle and in the evening are preferably measured; a is the effective cross-sectional area of water flow, and the unit is square meter%) For the effective cross-section area A of the water flow, a rain and sewage pipeline 8 with a continuous straight line section with no change in cross section and no drop on the water surface is selected for measurement, and the length of the straight line section of the rain and sewage pipeline 8 is preferably more than 10m;is the firstThe volume of water in the sewage collection tank 2 measured for the second time is expressed in liters (L); Is the firstThe collection time of the secondary measurement is given in seconds(s);

from the measured flow of the rain-and-sewage pipe 8Calculating the design flow of the rain and sewage pipeline 8：In the design flow rateIn cubic meters per hour (/ h),as the coefficient of the light-emitting diode,the value of (a) is determined according to the following table, and the total daily sewage amount means the total amount of all sewage flowing into the sewage collection tank 2 (unit:）：

average daily sewage total	≦20.0	50	100	150	≧250
						Coefficient beta	2.7	2.4	2.2	2.1	2.0

The water pump is selected to meet the following discharge flow ratesThe formula is：

In the water pump, the discharge flow rateThe unit is cubic meters per hour），For the number of working water pumps, the present embodiment is preferably=2 (primary pump 31 and secondary pump 32).

According to the embodiment, the correct water pump can be optimally selected through specific calculation, and under the condition that the sufficient running efficiency of the water pump is ensured, the water pump with higher power or higher water discharge can be avoided, so that more electric quantity is consumed, and the cost is effectively saved.

Calculating to obtain the discharge flow of the water pumpThe effective volume of the specific sewage collection tank 2 can be designedThe calculation should be as follows:

in the effective volumeThe unit of the water heater is cubic meter）；For the maximum starting and stopping times of the water pump per hour, 6 times/h to 12 times/h are preferably taken.

By designing the optimal effective volume of the sewage collection tank 2The manufacturing materials and manufacturing cost of the sewage collecting box 2 can be greatly saved, and the sewage collecting box 2 is convenient to bury or hang on the wall.

An embodiment two, this embodiment provides a method for mixing and draining rain sewage based on the system for mixing and draining rain sewage in the embodiment one, including the following steps:

s1, a water quality detection sensor 4 detects water quality data of sewage in a sewage collecting box 2 in real time, a liquid level detection sensor 5 detects water level data of the sewage in the sewage collecting box 2 in real time, a rainwater detection sensor 6 detects whether a place where the sewage collecting box 2 is located is in a rainy state in real time, and an intelligent control device 1 receives detection data of the water quality detection sensor 4, the liquid level detection sensor 5 and the rainwater detection sensor 6 and sends the detection data to a cloud service control end 10; the secondary liquid level detection sensor 112 detects the water level data of the sewage in the secondary sewage collection tank 11 in real time;

s2, when the rainwater detection sensor 6 detects that the place where the sewage collection tank 2 is located is in a rainwater-free state, and the liquid level detection sensor 5 detects that the water level of sewage in the sewage collection tank 2 exceeds a water pump liquid level threshold, the intelligent control device 1 starts the main water pump 31 or the auxiliary water pump 32 to pump the sewage in the sewage collection tank 2 and convey the sewage to the sewage treatment plant 7, and the main water pump 31 and the auxiliary water pump 32 are alternately used in the sewage pumping process;

When the liquid level detection sensor 5 detects that the water level of the sewage in the sewage collecting tank 2 is lower than the liquid level threshold of the water pump which is closed, the main water pump 31 or the auxiliary water pump 32 which is in operation is closed, and the sewage is stopped being pumped;

when the rainwater detection sensor 6 detects that the place where the sewage collection tank 2 is located is in a rainwater-free state, and the auxiliary liquid level detection sensor 112 detects that the water level data of the sewage in the auxiliary sewage collection tank 11 exceeds the liquid level threshold of the sewage pump which is started, the intelligent control device 1 starts the sewage pump 111 to pump the sewage in the auxiliary sewage collection tank 11 until the water level data of the sewage in the auxiliary sewage collection tank 11 is lower than the liquid level threshold of the sewage pump which is closed, and the intelligent control device 1 closes the sewage pump 111;

s3, when the rainwater detection sensor 6 detects that the place where the sewage collection tank 2 is located is in a raining state, the intelligent control device 1 starts the main water pump 31 or the auxiliary water pump 32 to pump sewage in the sewage collection tank 2 and convey the sewage to the sewage treatment plant 7 in a period of initial rain;

the period of the initial rain period is set to 15 minutes;

s4, after the period of the initial rain period, if the rainwater detection sensor 6 detects that the place where the sewage collection box 2 is located is in a raining state continuously, the water quality detection sensor 4 detects whether the water quality data of sewage in the sewage collection box 2 is larger than a sewage threshold value or not; if the water quality data is smaller than the sewage threshold value, the intelligent control device 1 turns off the main water pump 31 or the auxiliary water pump 32 in operation, the sewage in the sewage collecting tank 2 gradually increases until the sewage is discharged from the sewage outlet 22 of the sewage collecting tank 2 to the river 9, and meanwhile, the intelligent control device 1 turns off the sewage pumping pump 111 of the auxiliary sewage collecting tank 11, and the sewage in the auxiliary sewage collecting tank 11 gradually increases until the sewage is discharged from the sewage outlet 114 to the river 9; if the water quality data is greater than or equal to the sewage threshold, the intelligent control device 1 continues to operate the main water pump 31 or the auxiliary water pump 32, and alternately uses the main water pump 31 and the auxiliary water pump 32 according to the single opening time until the water quality data is smaller than the sewage threshold, and then the main water pump 31 or the auxiliary water pump 32 in operation is closed;

After the period of the initial rain period, if the rain water detection sensor 6 detects that the place where the sewage collection tank 2 is located is in a non-rain state, the main water pump 31 or the auxiliary water pump 32 in operation is turned off, and the process returns to the step S2.

In the implementation process of the steps S1-S4, if one of the main water pump 31 or the auxiliary water pump 32 fails, the intelligent control device 1 only controls the operable water pump, stops the alternate use of the main water pump 31 and the auxiliary water pump 32, and the intelligent control device 1 sends the condition that one of the water pumps cannot be operated to the cloud service control terminal 10, and the cloud service control terminal 10 performs alarm display on the water pump which cannot be operated; in the alternate use process, the single-time opening time of the main water pump 31 and the auxiliary water pump 32 is set to be 15 minutes;

in the implementation process of the steps S1-S4, if the local weather platform pushes weather prediction information of extreme weather to be encountered by the place where the sewage collecting tank 2 is located to the cloud service control end 10 after several hours in the future, the cloud service control end 10 sends an operation instruction of the direct drainage pump 33 to the intelligent control device 1, the intelligent control device 1 starts the direct drainage pump 33 and the sewage pump 111 after receiving the operation instruction, the direct drainage pump 33 pumps sewage in the sewage collecting tank 2 and drains the sewage to the sewage treatment plant 7 through the sewage conveying pipeline until the liquid level detection sensor 5 detects that the water level data of the sewage in the sewage collecting tank 2 reaches a standard value, and the intelligent control device 1 turns off the direct drainage pump 33; the sewage pump 111 pumps the sewage in the secondary sewage collection tank 11 until the secondary liquid level detection sensor 112 detects that the water level data of the sewage in the secondary sewage collection tank 11 reaches a set value, and the intelligent control device 1 turns off the sewage pump 111.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various equivalent changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The rainwater and sewage mixed drainage system comprises a sewage treatment plant, a rainwater pipeline and a river channel, and is characterized by further comprising intelligent control equipment, a sewage collecting box, a plurality of water pumps, a plurality of water quality detection sensors, a liquid level detection sensor and a rainwater detection sensor, wherein the sewage collecting box comprises a sewage inlet and a sewage outlet, and the water pumps comprise a main water pump and an auxiliary water pump;

the sewage inlet and the sewage outlet are arranged on different sides of the sewage collecting box, and the sewage inlet is lower than the sewage outlet in the height of the horizontal plane; the sewage inlet is connected with a rain sewage pipeline, and the sewage outlet is connected with a river channel;

the main water pump and the auxiliary water pump are fixedly arranged at the bottom in the sewage collection box and are connected with a sewage treatment plant through the same sewage conveying pipeline, and the main water pump and the auxiliary water pump are electrically connected with the intelligent control equipment;

The sewage collecting box is fixed on the top of the sewage collecting box or on the ground beside the sewage collecting box;

the water quality detection sensor and the liquid level detection sensor are placed in the sewage collection box and are electrically connected with the intelligent control equipment; the rainwater detection sensor is arranged on the ground beside the sewage collection box or on the top of the intelligent control equipment and is electrically connected with the intelligent control equipment;

the water quality detection sensor is used for detecting water quality data of sewage in the sewage collecting box, the liquid level detection sensor is used for detecting water level data of the sewage in the sewage collecting box, and the rainwater detection sensor is used for detecting whether the place where the sewage collecting box is located is in a raining state or not;

the intelligent control equipment is used for setting a water quality data threshold, starting a water pump liquid level threshold and closing the water pump liquid level threshold;

when the rainwater detection sensor detects that the place where the sewage collection box is located is in a rainwater-free state and the liquid level detection sensor detects that the water level of sewage in the sewage collection box exceeds the liquid level threshold of the water pump, the intelligent control equipment is used for starting the main water pump or the auxiliary water pump, the main water pump or the auxiliary water pump is used for pumping sewage in the sewage collection box and conveying the sewage to the sewage treatment plant until the water level of the sewage in the sewage collection box is lower than the liquid level threshold of the water pump, and the intelligent control equipment is used for closing the main water pump or the auxiliary water pump in operation;

The intelligent control equipment is used for setting the single-time starting time length of the main water pump and the auxiliary water pump, and is used for controlling the main water pump and the auxiliary water pump to be used alternately in the sewage pumping process;

when the rainwater detection sensor detects that the ground where the sewage collection box is located is in a raining state, the intelligent control device is also used for starting the main water pump or the auxiliary water pump to pump sewage in the sewage collection box and convey the sewage to a sewage treatment plant in the period of initial rain;

after the period of the initial rain period, if the rainwater detection sensor detects that the place where the sewage collection box is located is in a raining state continuously, the water quality detection sensor is used for detecting whether water quality data of sewage in the sewage collection box is larger than a sewage threshold value, if the water quality data is smaller than the sewage threshold value, the intelligent control device is used for closing a main water pump or an auxiliary water pump in operation, and the sewage in the sewage collection box is gradually increased until the sewage is discharged from a sewage outlet of the sewage collection box to a river channel; if the water quality data is greater than or equal to the sewage threshold, the intelligent control device is used for continuously operating the main water pump or the auxiliary water pump, and alternately using the main water pump and the auxiliary water pump according to the single opening time until the water quality data is smaller than the sewage threshold, and then closing the main water pump or the auxiliary water pump in operation.

2. The system for mixing and draining sewage and rain water according to claim 1, further comprising a cloud service control end, wherein the intelligent control device is connected with the cloud service control end through wired communication or wireless communication, and is further used for sending detection data of a water quality detection sensor, a liquid level detection sensor and a rain water detection sensor to the cloud service control end, and the cloud service control end displays the detection data;

the intelligent control equipment is also used for monitoring the running states of the main water pump and the auxiliary water pump in real time, and if one of the main water pump or the auxiliary water pump cannot run, the intelligent control equipment can only control the running water pump to pump sewage in the sewage collecting box, and the alternate use of the water pumps is stopped;

the intelligent control equipment is also used for sending the condition that the main water pump and the auxiliary water pump cannot operate to the cloud service control end, and the cloud service control end is also used for carrying out alarm display on the water pump which cannot operate.

3. The rain sewage mixing and draining system according to claim 2, further comprising a direct-drainage pump connected with a sewage treatment plant through a sewage conveying pipeline, wherein the direct-drainage pump is electrically connected with the intelligent control device;

The cloud service control end is further used for receiving weather forecast information pushed by the local weather platform, if the cloud service control end receives weather forecast information of extreme weather encountered by the place where the sewage collecting box is located after a plurality of hours in the future, the cloud service control end is used for sending an operation instruction of the direct drainage pump to the intelligent control equipment, the intelligent control equipment starts the direct drainage pump after receiving the operation instruction, and the direct drainage pump is used for pumping sewage in the sewage collecting box and draining the sewage to a sewage treatment plant through a sewage conveying pipeline until the liquid level detection sensor detects that the water level data of the sewage in the sewage collecting box reaches a standard value.

4. A rain sewage mixing and draining system according to claim 3, wherein the sewage treatment plant is used for monitoring its own sewage treatment state in real time, if the sewage treatment plant knows that the sewage treatment plant has already been overloaded, the sewage treatment plant is used for sending a sewage conveying stopping instruction to each intelligent control device, commanding the intelligent control device to stop conveying sewage to the sewage treatment plant continuously, and after receiving the sewage conveying stopping instruction, the intelligent control device turns off the main water pump and the auxiliary water pump, and stops conveying sewage to the sewage treatment plant.

5. The rain sewage mixing and draining system according to claim 3, further comprising a plurality of auxiliary sewage collecting boxes and a plurality of sewage branch pipelines, wherein a sewage pumping pump and an auxiliary liquid level detection sensor are fixedly arranged at the bottom in each auxiliary sewage collecting box, each auxiliary sewage collecting box comprises a sewage input port and a sewage output port, the sewage input ports and the sewage output ports are arranged on different sides of each auxiliary sewage collecting box, and the level of the sewage input ports is lower than that of the sewage output ports;

the outer side edge of the bottom of the sewage collection box is provided with a plurality of sewage inlet branch pipes; the sewage inlet is connected with a sewage branch pipeline, the sewage outlet is connected with a river channel, the sewage pump is connected with a sewage inlet branch pipe of the sewage collecting box through a water pipe, and the intelligent control equipment is electrically connected with the sewage pump and the auxiliary liquid level detection sensor;

the auxiliary liquid level detection sensor is used for detecting the water level data of sewage in the auxiliary sewage collecting box, and the intelligent control equipment is also used for setting a liquid level threshold value of the sewage pump to be opened and a liquid level threshold value of the sewage pump to be closed; when the auxiliary liquid level detection sensor detects that the water level data of the sewage in the auxiliary sewage collecting box exceeds the liquid level threshold of the sewage pump, the intelligent control device is used for starting the sewage pump to pump the sewage in the auxiliary sewage collecting box until the water level data of the sewage in the auxiliary sewage collecting box is lower than the liquid level threshold of the sewage pump, and the intelligent control device is used for closing the sewage pump;

After the period of the initial rain period, if the rainwater detection sensor detects that the place where the sewage collection box is located is in a raining state continuously, and the water quality data is smaller than the sewage threshold value, the intelligent control equipment is used for closing the main water pump or the auxiliary water pump in operation, and simultaneously, the intelligent control equipment is also used for closing the sewage pumping pump of the auxiliary sewage collection box, and sewage in the auxiliary sewage collection box is gradually increased until the sewage is discharged from the sewage output port to the river channel;

if the cloud service control end receives weather forecast information of extreme weather of the place where the sewage collecting box is located after a plurality of hours in the future, the cloud service control end is used for sending an operation instruction of the direct drainage pump to the intelligent control equipment, the intelligent control equipment starts the direct drainage pump after receiving the operation instruction, and simultaneously starts the sewage pumping pump of the sewage collecting box to pump sewage in the auxiliary sewage collecting box until the auxiliary liquid level detection sensor detects that the water level data of the sewage in the auxiliary sewage collecting box reaches a set value, and the intelligent control equipment closes the sewage pumping pump.

6. A rain sewage mixing system according to claim 3, wherein for the main water pump, the auxiliary water pump and the direct water pump, the discharge flow rate thereof is that The following calculation formula is satisfied:

in the above-mentioned method, the step of,is designed to be the flow rate of the rain and sewage pipeline,to select the number of water pumps;

in the above, isThe measured flow of the rain and sewage pipeline under the condition of sunny day,is a coefficient;

in the above-mentioned method, the step of,in order to determine the number of times,is the firstThe volume of sewage in the sewage collecting box is measured for the second time,is the firstCollection time for secondary measurement;

according to the discharge flowAcquiring effective volume of sewage collection box:

In the method, in the process of the invention,is the maximum start-stop frequency of the water pump per hour.

7. A method of mixing and draining sewage, which is operated on a system for mixing and draining sewage according to claim 5, comprising the steps of:

s1, detecting water quality data of sewage in a sewage collecting box in real time by a water quality detection sensor, detecting water level data of the sewage in the sewage collecting box in real time by a liquid level detection sensor, detecting whether a place where the sewage collecting box is located is in a rainy state or not in real time by a rainwater detection sensor, receiving detection data of the water quality detection sensor, the liquid level detection sensor and the rainwater detection sensor by intelligent control equipment, and sending the detection data to a cloud service control end;

s2, when the rainwater detection sensor detects that the place where the sewage collection box is located is in a rainwater-free state, and when the liquid level detection sensor detects that the water level of sewage in the sewage collection box exceeds the water level threshold of the water pump, the intelligent control equipment starts the main water pump or the auxiliary water pump to pump the sewage in the sewage collection box and convey the sewage to the sewage treatment plant, and when the water level of the sewage in the sewage collection box is lower than the water level threshold of the water pump, the main water pump or the auxiliary water pump which is in operation is closed to stop pumping the sewage; in the sewage pumping process, the main water pump and the auxiliary water pump are alternately used;

S3, when the rainwater detection sensor detects that the ground where the sewage collection box is located is in a rainy state, the intelligent control device starts the main water pump or the auxiliary water pump in a period of initial rain to pump sewage in the sewage collection box and convey the sewage to a sewage treatment plant;

s4, after the period of the initial rain period, if the rainwater detection sensor detects that the place where the sewage collection box is located is in a raining state continuously, the water quality detection sensor detects whether the water quality data of sewage in the sewage collection box is larger than a sewage threshold value; if the water quality data is smaller than the sewage threshold value, the intelligent control equipment turns off the main water pump or the auxiliary water pump in operation, and the sewage in the sewage collecting box is gradually increased until the sewage is discharged to a river channel from a sewage outlet of the sewage collecting box;

if the water quality data is greater than or equal to the sewage threshold, the intelligent control equipment continues to operate the main water pump or the auxiliary water pump, and alternately uses the main water pump and the auxiliary water pump according to the single starting time until the water quality data is smaller than the sewage threshold, and then the main water pump or the auxiliary water pump in operation is closed;

and after the period of the initial rain period, if the rainwater detection sensor detects that the place where the sewage collection box is located is in a non-rain state, the main water pump or the auxiliary water pump in operation is turned off, and the step S2 is returned.

8. The method for mixing and draining sewage according to claim 7, wherein the step S1 further comprises: the secondary liquid level detection sensor detects the water level data of the sewage in the secondary sewage collecting box in real time;

the step S2 further includes: when the rainwater detection sensor detects that the place where the sewage collection box is located is in a rainwater-free state, and the auxiliary liquid level detection sensor detects that the water level data of sewage in the auxiliary sewage collection box exceeds the liquid level threshold of the sewage pump which is started, the intelligent control equipment starts the sewage pump to pump the sewage in the auxiliary sewage collection box until the water level data of the sewage in the auxiliary sewage collection box is lower than the liquid level threshold of the sewage pump which is closed, and the intelligent control equipment closes the sewage pump;

in the step S4, if the water quality data is smaller than the sewage threshold, the intelligent control device turns off the main water pump or the auxiliary water pump in operation, the sewage in the sewage collecting tank gradually increases until the sewage is discharged from the sewage outlet of the sewage collecting tank to the river channel, and simultaneously, the intelligent control device turns off the sewage pumping pump of the auxiliary sewage collecting tank, and the sewage in the auxiliary sewage collecting tank gradually increases until the sewage is discharged from the sewage outlet to the river channel.

9. The method for mixing and draining sewage and rain water according to claim 8, wherein in the implementation process of steps S1-S4, if one of the main water pump and the auxiliary water pump fails, the intelligent control device only controls the operable water pump, the alternate use of the main water pump and the auxiliary water pump is stopped, the intelligent control device sends the condition that one of the water pumps cannot be operated to the cloud service control end, and the cloud service control end carries out alarm display on the water pump which cannot be operated.

10. The method for mixing and draining rain sewage according to claim 9, wherein in the implementation process of steps S1-S4, if the local weather platform pushes weather prediction information of extreme weather to the place where the sewage collecting tank is located after a plurality of hours in the future to the cloud service control end, the cloud service control end sends an operation instruction of the direct drainage pump to the intelligent control device, the intelligent control device starts the direct drainage pump and the sewage pump after receiving the operation instruction, the direct drainage pump pumps sewage in the sewage collecting tank and drains the sewage to the sewage treatment plant until the liquid level detection sensor detects that the water level data of the sewage in the sewage collecting tank reaches a standard value, and the intelligent control device turns off the direct drainage pump; the sewage pump pumps sewage in the auxiliary sewage collecting box until the auxiliary liquid level detection sensor detects that the water level data of the sewage in the auxiliary sewage collecting box reaches a set value, and the intelligent control equipment closes the sewage pump.