Automatic monitoring equipment and method suitable for the interface between urban drainage and water system

Abstract

The present invention discloses an automatic monitoring device and method suitable for the interface between urban drainage and water systems, comprising a rainwater drainage pipe and a barrier device. The rainwater drainage pipe is divided into three sections, namely the urban drainage pipe section, the water system river section and the equipment section. The barrier device comprises a barrier base, a barrier buffer, a pressure sensor and a barrier core arranged in sequence; the barrier base is fixed on the pipe wall of the water system river section; the barrier base is sequentially connected to the barrier buffer, the pressure sensor and the barrier core; a water quality sensor assembly is arranged outside the urban drainage pipe section, the water quality sensor assembly comprises a reset spring, a water quality sensor and a traction line, one end of the traction line is connected to the barrier core and the other end is connected to the water quality sensor. When the barrier core is flushed open by water from the urban drainage pipe side, the traction line pulls the water quality sensor through the through hole in the pipe wall into the rainwater drainage pipe to detect the water quality of the pipe water. The present invention realizes the automatic monitoring function of the one-way water quantity and water quality of the pipeline water, overcoming the influence of river water backflow on water quality and quantity.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline water quantity and quality monitoring, and in particular to automatic monitoring equipment and methods suitable for the interface between urban drainage and water systems. Background Art

[0002] Urban river and lake systems primarily rely on pipeline networks to transport materials between land and water. Pipeline outlets, particularly stormwater outlets, serve as critical water and pollutant transfer nodes at the interface between urban water and land, making water quantity and quality monitoring crucial.

[0003] Currently, there are two main methods for monitoring water volume and quality at stormwater pipe outlets: one is manual monitoring, which involves manually monitoring and sampling at the stormwater pipe outlet, recording the amount of water flowing through per unit time and the concentration of water quality indicators. This monitoring method is not only time-consuming and labor-intensive, but also inconsistent. Furthermore, when there is heavy rainfall and river levels rise rapidly, monitoring can be dangerous, and is gradually being replaced by automated monitoring equipment. The other method involves placing flow monitoring instruments, such as Doppler ultrasonic flowmeters, in the stormwater pipe, and placing water quality sensors next to the flow monitoring instruments to simultaneously monitor water quality indicators. This universal monitoring method, to a certain extent, enables the simultaneous monitoring of water volume and quality at the stormwater pipe outlet.

[0004] As urban rivers operate over time, sediment accumulates at their bottoms, partially occupying their reservoir capacity and causing water levels to rise. Furthermore, to improve water quality and protect ecological baseflow, some urban river and lake systems have implemented interbasin water diversion projects. This increased ecological water replenishment has also contributed to rising river levels. Of particular concern is the frequent occurrence of extreme precipitation events in urban areas in recent years. These intense, short-term rainfall events have caused rapid increases in river levels, even leading to overflowing.

[0005] Affected by factors such as river siltation, increased ecological water replenishment and short-duration heavy rainfall, the rainwater pipe outlets originally designed to be above the river water level are submerged by the river water level during local periods of the year or on an annual scale, resulting in the phenomenon of river water backflow. This phenomenon prevents the pipe water from flowing freely and causes the mixing of pipe water and river water.

[0006] To address the issue of flooding of rainwater outlets caused by rising river water levels, the existing monitoring method of installing flow meters and water quality sensors has exposed problems with inaccurate flow monitoring and unclear water quality monitoring. First, due to the influence of river water backflow, the flow meter originally used to monitor the pipe water flow is submerged in the river water. The monitored value is the result of the two-way interaction of pipe water and river water, which is significantly different from the actual pipe water flow. Second, due to the mixing of pipe water and river water, the sensor originally used to monitor the concentration of pipe water quality indicators is submerged in the mixture of river water and pipe water, which is significantly different from the actual pipe water quality concentration. Summary of the Invention

[0007] In response to the above problems, the present invention provides an automatic monitoring device and method suitable for the interface between urban drainage and water systems. The equipment uses fluid mechanics and spring deformation principles. According to the relationship between pipeline water thrust, frictional resistance and river water support force, a one-way fluid barrier is designed that can automatically fit and detach from the pipeline wall. The device realizes the functions of automatically forming a water flow path when pipeline water flows out and automatically cutting off the water flow path when river water flows back. Assisted by a water quality sensor, the device can accurately calculate the pollution load carried by the outflowing pipeline water.

[0008] The present invention is achieved in that:

[0009] An automatic monitoring device suitable for use at the interface between urban drainage and water systems, placed between the urban drainage pipeline and the water system river, comprising a rainwater drainage pipe and a barrier device. The rainwater drainage pipe is divided into three sections: an urban drainage pipeline section, a water system river section, and an equipment section. The equipment section is located between the urban drainage pipeline section and the water system river section. The diameter of the drainage pipe in the equipment section is larger than that of the drainage pipes in the urban drainage pipeline section and the water system river section, and the equipment section forms a circular step with the urban drainage pipeline section and the water system river section.

[0010] The blocking device includes a blocking device base, a blocking buffer, a pressure sensor, and a blocking core arranged in sequence; the blocking device base is fixed to the pipe wall of the water system river section; the blocking device base is connected to the blocking buffer, the blocking core is a frustum column, and the pressure sensor is fixed to the end face of the blocking core facing the water system river; the blocking buffer is provided with a buffer spring, which presses against the pressure sensor to press the annular conical surface of the frustum column of the blocking core against the annular step end face of the urban drainage pipe section to block the path for backflow of rainwater from the drainage pipe river section;

[0011] The rain drain pipe is evenly distributed around the outer circle of the urban drainage pipe section and is provided with at least three groups of water quality sensor assemblies. The water quality sensor assembly includes a reset spring, a water quality sensor and a traction line. One end of the reset spring is fixed to the outer wall of the rain drain pipe, and the other end of the reset spring pulls one end of the water quality sensor. The other end of the water quality sensor is connected to the barrier core through a through hole provided on the pipe wall via the traction line.

[0012] When the barrier core is flushed open by the water from the urban drainage pipe side, the barrier core drives the traction line to pull the water quality sensor from the through hole into the rainwater drainage pipe to detect the water quality of the water from the urban drainage pipe side. At the same time, the three traction lines pull the displaced barrier core to keep it in a stable suspended state.

[0013] Furthermore, the through hole is arranged on the side wall of the annular step at the connection between the equipment section and the urban drainage pipe section, and a one-way hinge gate is arranged on the inner side of the side wall of the through hole. The one-way hinge gate is in a closed state when the barrier core is not flushed open by the water from the urban drainage pipe side.

[0014] Furthermore, the water quality sensor assembly includes a sensor fixing frame, a sensor slide rail, a reset spring, and a water quality sensor. The sensor fixing frame is fixed on the outer wall of the urban drainage pipe section. The water quality sensor is installed on the sensor slide rail. The sensor slide rail is slidingly connected to the sensor fixing frame. The water quality sensor is connected to the bracket fixed on the outer wall of the urban drainage pipe section through the reset spring.

[0015] Furthermore, a fixed shaft and a guide wheel are provided on the end surface of the barrier core facing the river channel, and the traction line is connected to the fixed shaft and then passes around the guide wheel to be connected to the water quality sensor.

[0016] Furthermore, the water quality sensor and the pressure sensor are connected with a wireless signal transmitter, and the wireless signal transmitter transmits the sensor signal to a remote processor.

[0017] Furthermore, a plurality of limit blocks are evenly arranged around the pipe wall of the water system river section, and the limit blocks protrude out of the annular steps of the water system river section to limit the distance that the barrier core is flushed.

[0018] Furthermore, the base of the barrier is a circular ring, and a filter net is provided in the middle of the ring to prevent the backflow of river water carrying debris to block the rainwater drainage pipe.

[0019] Furthermore, the blocking buffer includes at least three support rods and the buffer spring. The three support rods are separated in a cone shape, and one end of the separated rods is connected to the blocker base at equal angles. The other ends of the three support rods are connected to the buffer spring through support columns.

[0020] Furthermore, the support column is a support column for adjusting the pressure of the buffer spring. A thread is provided on the outer circle of the support column. The buffer spring is screwed into the support column along the thread. The pressure of the buffer spring on the pressure sensor can be adjusted through the support column thread.

[0021] An automatic monitoring method based on the automatic monitoring equipment applicable to the interface between urban drainage and water system, which monitors urban drainage by acquiring signals from a pressure sensor and a water quality sensor and measuring the horizontal angle of the rainwater drainage pipe relative to the water system river channel, wherein: the water quality sensor includes different element sensor probes set according to different water quality indicators; the process is:

[0022] Step 1: Adjust the buffer spring to determine the blocking pressure of the blocking core;

[0023] Step 2: When the fixed barrier core is washed away by rainwater from the urban drainage pipe:

[0024] The discharge flow rate is calculated by the discharge flow rate formula.

[0025] Discharge flow formula

[0026] in:

[0027] F1 is the blocking pressure of the barrier core;

[0028] is the outlet flow of the rainwater pipe during the specified period, m 3 / s; ρ is the density of water, kg / m 3 ; g is the acceleration due to gravity, m / s 2 ; α is the elevation angle of the rainwater pipe, degrees; t1 and t2 represent the start and end time of the specified period, seconds;

[0029] The pollution load carried by pipeline water is calculated using the pollution load formula.

[0030] Pollution load formula

[0031] in:

[0032] is the concentration of the i-th water quality indicator in the specified time period, mg / L.

[0033] The beneficial effects of the present invention are: realizing the automatic monitoring function of one-way water quantity and water quality of urban pipeline drainage. The barrier core of the one-way fluid barrier is fitted with the pipe wall to realize one-way flow of pipeline water, cut off the path of backflow of river water, and overcome the influence of backflow of river water on the monitoring of pipeline water quality and quantity. The urban pipeline drainage pushes the barrier core to move and pull the water quality sensor, so as to achieve synchronous perception of water quality when urban pipeline drainage flows out, and no water quality monitoring is performed when river water backflows, thus overcoming the problem of unclear water quality caused by mixing of pipeline water and river water. In addition, the device is easy to disassemble and maintain. It can be directly installed at the outlet of the urban drainage pipe according to the size of the pipe diameter. It can be directly disassembled during maintenance without damaging the structure of the urban drainage pipe. At the same time, the water quality sensor is outside the pipe wall, which is more convenient for replacing accessories such as batteries and facilitating rapid signal transmission.

[0034] The present invention is explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the present invention;

[0036] Figure 2 It is a schematic diagram of the structure of the barrier buffer of the present invention;

[0037] Figure 3 This is a partial enlarged view of the water quality sensor assembly of the present invention;

[0038] Figure 4 It is the stress condition of the device in the water-free state of the present invention;

[0039] Figure 5 The stress condition of the device when the water pressure of the river water and the water pressure of the pipeline are equal;

[0040] Figure 6 The stress condition of the device when the water pressure of the river water is greater than the water pressure of the pipeline water;

[0041] Figure 7 The stress condition of the device when the water pressure of the river water is lower than the water pressure of the pipeline water;

[0042] Figure 8 It is a schematic diagram of the force of the water column within a unit time period of the present invention.

[0043] In the figure: rainwater drainage pipe 1, barrier base 2, filter screen 3, barrier buffer 4, limit block 5, pressure sensor 6, barrier core 7, fixed shaft 8, guide wheel 9, one-way hinge gate 10, sensor fixing frame 11, sensor slide rail 12, reset spring 13, water quality sensor 14, traction line 15, bracket 16, through hole 17, support column 18, support rod 4-1, buffer spring 4-2. DETAILED DESCRIPTION

[0044] Example 1;

[0045] An automatic monitoring device suitable for the interface between urban drainage and water system, such as Figures 1 to 7 As shown, the automatic monitoring equipment includes a rainwater drainage pipe 1 and a blocking device. The rainwater drainage pipe 1 is divided into three sections, namely, an urban drainage pipe section 103, a water system river section 101, and an equipment section 102. The equipment section 102 is located between the urban drainage pipe section 103 and the water system river section 101. The diameter of the drainage pipe of the equipment section 102 is larger than the diameters of the drainage pipes of the urban drainage pipe section 103 and the water system river section 101. In this embodiment, the equipment section 102 is made of a folded ring of a groove-shaped profile. The two side walls of the groove form annular steps with the urban drainage pipe section 103 and the water system river section 101 respectively.

[0046] The barrier device includes a barrier base 2, a barrier buffer 4, a pressure sensor 6, and a barrier core 7, which are arranged in sequence from the river channel side of the rainwater drainage pipe 1 to the urban drainage pipe side. The barrier base 2 is fixed to the pipe wall of the river channel section 101; the barrier base 2 is connected to the barrier buffer 4, and the barrier core 7 is a frustum column. The pressure sensor 6 is fixed to the end face of the barrier core 7 facing the river channel. The end face of the barrier core 7 facing the river channel is provided with a fixed shaft 8 and a guide wheel 9.

[0047] A plurality of stoppers 5 are evenly arranged around the wall of the water channel section 101. The stoppers 5 extend beyond the annular steps of the water channel section 101. When the water flow in the pipeline is excessive, the barrier core 7 is impacted by the urban pipeline water flow and moves toward the water channel section. When the barrier core 7 moves to a certain position, it is blocked by the stoppers 5. Even in this situation, the pipeline water can still flow smoothly out from the gaps between the stoppers 5. Under special water flow conditions, the position of the barrier core 7 can be restricted to maintain the stability and functionality of the device, while ensuring the normal flow of pipeline water, avoiding water flow obstruction caused by the movement of the barrier core 7 or other factors, thereby ensuring the continuity of the entire pipeline water supply process and reducing various problems that may be caused by abnormal water flow, such as excessive pipeline pressure.

[0048] The barrier base 2, the limiting block 5 and the barrier core 7 are made of lightweight carbon fiber material.

[0049] The blocking buffer 4 is provided with a buffer spring 4-2, which presses against the pressure sensor 6 to elastically press the annular conical surface of the cone-shaped column of the blocking core 7 against the annular step end surface of the urban drainage pipe section 103 to block the path of the rainwater drainage pipe 1 from flowing back into the river;

[0050] The rain drain pipe 1 is evenly distributed around the outer circle of the urban drainage pipe section 103 to set at least three groups of water quality sensor components, the water quality sensor component includes a sensor fixing frame 11, a sensor slide rail 12, a reset spring 13, and a water quality sensor 14. The sensor fixing frame 11 is fixed on the outer side wall of the urban drainage pipe section 103, the water quality sensor 14 is installed on the sensor slide rail 12, the sensor slide rail 12 is slidably connected to the sensor fixing frame 11, and one end of the water quality sensor 14 is connected to the fixed frame 11 through the reset spring 13. It is connected to a bracket 16 fixed on the outer wall of the urban drainage pipe section 103; the other end of the water quality sensor 14 passes through a through hole 17 set on the pipe wall through a traction line 15, bypasses the guide wheel 9 and is connected to a fixed shaft 8 located on the barrier core 7; when the barrier core 7 is flushed open by water from the urban drainage pipe side, the barrier core 7 drives the traction line 15 to pull the water quality sensor 14 from the through hole 17 into the rainwater drainage pipe 1 to detect the water quality of the water from the urban drainage pipe side. At the same time, the three traction lines 15 pull the displaced barrier core 7 to keep it in a stable suspended state.

[0051] The through hole 17 is arranged on the side wall of the annular step at the connection between the equipment section 102 and the urban drainage pipe section 103. A one-way hinge gate 10 is arranged on the inner side of the side wall of the through hole 17. The one-way hinge gate 10 is in a closed state when the barrier core 7 is not flushed open by the water from the urban drainage pipe side.

[0052] The water quality sensor 14 consists of a front-end water quality indicator sensing probe and a rear-end water quality monitoring power supply, storage, and transmission device. The front-end water quality indicator sensing probe can integrate the monitoring of chemical oxygen demand, ammonia nitrogen, total phosphorus, and dissolved oxygen, with a monitoring frequency of one set every 10 seconds. The rear-end water quality monitoring power supply, storage, and transmission device uses a 12V voltage for power supply, a 128G memory card for storage, and an enhanced 4G signal for data transmission. The water quality sensor 14 and the pressure sensor 6 are respectively connected to a wireless signal transmitter, which transmits the pressure signal and water quality signal generated by the spring deformation caused by the change in the water flow in the pipeline to the remote processor.

[0053] The barrier base 2 is annular, and the barrier buffer 4 includes a support rod 4-1 and a buffer spring 4-2. The support rod 4-1 is connected to the barrier base 2 at 0°, 120°, and 240° by hot-press welding. The other end of the support rod 4-1 is connected to the buffer spring 4-2 via a support column 18. A detachable stainless steel filter screen is provided in the middle of the annular barrier base 2 to prevent backflow of river water carrying debris and clogging the storm drain pipe 1. When water from the urban drainage pipe flows out of the river, it can automatically carry debris intercepted by the filter screen back into the river, ensuring the continued smooth flow and effective operation of the pipeline system.

[0054] The adjusting buffer spring 4-2 can be a pressure spring with customized pressure, but this is not flexible. Therefore, in this embodiment, the support column 18 is set as a pressure support column for adjusting the buffer spring 4-2. Therefore, a thread is provided on the outer circle of the support column 18, and the buffer spring 4-2 is screwed into the support column 18 along the thread. The pressure of the buffer spring 4-2 on the pressure sensor 6 can be adjusted through the thread of the support column 18. Of course, the support column 18 can also have other structural methods, such as using a slide groove block structure to adjust the pressure of the buffer spring 4-2 on the pressure sensor 6.

[0055] When the water pressure of the river water is greater than the water pressure of the pipe water, river water backflow occurs. At this time, the side of the barrier core 7 facing the pipe water is tightly fitted with the side wall of the rainwater pipe 101, and the river water is blocked by the barrier core 7 and cannot enter the urban drainage pipe. At this time, the one-way hinge gate 10 is closed, and the water quality sensor 14 is located outside the rainwater drainage pipe 1, and water quality monitoring is not performed.

[0056] When the water pressure in the pipeline is greater than the water pressure in the river, the barrier core 7 is flushed open by the water from the urban drainage pipe side, and the traction line 15 pulls the water quality sensor 14 into the rainwater drainage pipe 1 from the through hole 17. At this time, the one-way hinge gate 10 is opened. At this time, the water quality sensor 14 performs water quality detection on the water from the urban drainage pipe side, and the urban drainage flows into the river normally.

[0057] Example 2;

[0058] This embodiment is another implementation of embodiment 1. Figure 4 As shown, the difference lies in the installation method of the barrier base 2. The barrier base 2 is no longer installed on the inner wall of the water channel section 101 of the rainwater drainage pipe 1, but the water channel section 101 of the rainwater drainage pipe 1 is divided into two sections, and then the two sections of the water channel section 101 of the rainwater drainage pipe 1 and the barrier base 2 are hot-pressed and welded into one. The beneficial effects of this embodiment are consistent with those of embodiment 1, and the processing is simpler.

[0059] Example 3;

[0060] An automatic monitoring method for the interface between urban drainage and water systems is based on the calculation method for automatic monitoring equipment for the interface between urban drainage and water systems described in Example 1. The content of Example 1 is applicable to this embodiment. The method utilizes the conversion relationship between fluid force and spring deformation pressure to automatically and accurately calculate the pipe outlet flow rate under complex hydraulic conditions. The fluid thrust automatically adjusts the fit between the barrier core 7 and the rainwater pipe wall to achieve the rapid formation of a unidirectional water flow path within the pipe. Taking into account the force applied to the barrier core 7, the following formula is derived to calculate the rainwater pipe outlet flow rate and pollution load:

[0061] Initial state: When the barrier core 7 blocks the passage, a pre-pressure is applied to the pressure sensor 6, but the pressure value of the pressure sensor 6 is adjusted to 0. The following three cases illustrate the pressure value of the pressure sensor 6.

[0062] 1. If Figure 4 、 Figure 5 As shown, when there is no water in the rain drain pipe 1 ( Figure 4 ) or the river water pressure is equal to the pipe water pressure ( Figure 5 ), no flow is flowing out of the rainwater drainage pipe 1. At this time, the water-facing side of the barrier core 7 is in close contact with the side wall of the urban drainage pipe section 103, the buffer spring 4-2 is not deformed, and the pressure sensor 6 shows a value of 0.

[0063] 2. If Figure 6 As shown, when the water pressure in the river exceeds the water pressure in the pipeline, river water backflow occurs, and the pipeline water cannot flow freely. At this time, the side of the barrier core 7 facing the pipeline water is tightly attached to the side wall of the urban drainage pipeline section 103, the buffer spring 4-2 does not deform, and the pressure sensor 6 displays a value of 0.

[0064] 3. If Figure 7 As shown, when the river water pressure is lower than the pipe water pressure, the pipe water pushes the barrier core 7 toward the outlet, creating a flow path between the barrier core 7 and the storm drain pipe 1, allowing the pipe water to flow toward the outlet. Simultaneously, the barrier core 7 pulls the water quality sensor 14 through the one-way hinged gate 10 and into the storm drain pipe 1, simultaneously monitoring the pipe water quality. At this point, the pressure sensor 6 records the pressure generated by the barrier core 7's displacement toward the pipe outlet.

[0065] like Figure 8 As shown in the figure, according to the stress of the barrier core 7, the deformation of the buffer spring 4-1 in the barrier buffer 4 comprehensively reflects the result of the combined effect of the pipeline water thrust, the frictional resistance of the pipeline water against the pipe wall and the supporting force of the river water. This comprehensive result can be characterized by the dynamic variable of the pipeline flow rate. In the figure:

[0066] f1 is the gravity of the water column per unit time;

[0067] f 1-1 is the horizontal component of the gravity of the water column per unit time: thrust;

[0068] f 1-2 is the vertical component of the gravity of the water column per unit time: pressure;

[0069] f2 is the frictional resistance of the water column per unit time, equal to μ·f 1-2 , μ is the friction coefficient;

[0070] f3 is the supporting force of river water per unit time;

[0071] When the displayed value F1 of the pressure sensor 6 is equal to 0, it indicates that the pipe water thrust is less than or equal to the frictional resistance and the lifting force, that is, there is no water in the rainwater pipe or the water pressure in the rainwater pipe is less than or equal to the backflow pressure of the river water. In this case, there is no flow out of the rainwater pipe outlet. When the displayed value F1 of the pressure sensor 6 is greater than 0, it indicates that the pipe water thrust is greater than the frictional resistance and the lifting force, that is, the water pressure in the rainwater pipe is greater than the backflow pressure of the river water. In this case, there is flow out of the rainwater pipe outlet. The meaning of the displayed value F1 of the pressure sensor 6 is shown in the following formula.

[0072]

[0073] The method of this embodiment can monitor urban drainage by acquiring signals from the pressure sensor 6 and the water quality sensor 14 and measuring the horizontal angle of the rainwater drainage pipe 1 relative to the river channel. The water quality sensor 14 includes different element sensor probes set according to different water quality indicators. The process is as follows:

[0074] Step 1: Adjust the buffer spring 4-2 to determine the blocking pressure of the blocking core 7;

[0075] Step 2: When the barrier core 7 is washed away by rainwater from the urban drainage pipe:

[0076] The flow calculation result is corrected using the elevation angle α of the rainwater pipe to obtain the dynamic flow change value of the rainwater pipe per unit time, and the discharge flow is calculated using the discharge flow formula;

[0077] Discharge flow formula

[0078] Where:

[0079] F1 is the blocking pressure of the barrier core 7;

[0080] Q is the outlet flow of the rainwater pipe during the specified period, m 3 / s;

[0081] ρ is the density of water, kg / m 3 ; g is the acceleration due to gravity, m / s 2 ;

[0082] α is the elevation angle of the rainwater pipe, in degrees; t1 and t2 represent the start and end times of the specified time period, in seconds; based on the water quality index sensing data obtained by the water quality sensor 14, the pollution load carried by the pipe water is calculated using the pollution load formula:

[0083] Pollution load formula: is the concentration of the i-th water quality indicator in the specified time period, mg / L.

[0084] The above-mentioned embodiment of the automatic water quantity and quality monitoring equipment and method suitable for the interface between urban pipelines and water systems, wherein: the equipment cleverly uses fluid mechanics and spring deformation principles, and designs a one-way fluid barrier that can automatically fit and detach from the pipeline wall based on the relationship between pipeline water thrust, frictional resistance and river water support force, realizing the function of automatically forming a water flow path when pipeline water flows out and automatically cutting off the water flow path when river water flows back, and supplemented by a water quality sensor, it can accurately calculate the pollution load carried by the pipeline water outflow.

[0085] The one-way fluid barrier designed in the embodiment can realize the function of automatic monitoring of the one-way water quantity and water quality of the rainwater pipe, successfully overcoming the problems of inaccurate flow measurement and unclear water quality caused by the backflow of river water in the traditional method. On the one hand, the barrier core in the one-way fluid barrier cleverly utilizes its close fit with the pipe wall. When the pipe is flowing out normally, a specific water flow path can be formed. When the river water backflows, this water flow path will be cut off in time, thereby effectively overcoming the adverse effects of the backflow of river water on the pipe outflow. On the other hand, the barrier core is pushed to move by the pipe water, which further pulls the water quality sensor to move, achieving the effect of "borrowing force to transmit force", that is, the water quantity and quality are synchronously sensed when the pipe flows out, and the water quantity and quality are no longer monitored when the river water backflows. This overcomes the problem of unclear water quality caused by the mixing of pipe water and river water caused by the backflow of river water.

[0086] The one-way fluid barrier designed in the embodiment cleverly utilizes the interaction relationship between fluid mechanics and spring deformation, and adopts a pressure sensor to comprehensively reflect the combined effect of pipeline water thrust, frictional resistance and river water support force. The pressure sensor display is further characterized by the pipeline flow, and the flow calculation value is revised in combination with the hydraulic gradient of the rainwater pipeline, which solves the problem of inaccurate measurement of pipeline water outlet flow caused by irregular river backflow under complex hydraulic connections.

[0087] The embodiments meet the needs of multiple application scenarios. The first one is suitable for monitoring the water quantity and quality of urban pipeline drainage and sewage during the rainy season, and can provide a quantitative basis for the formulation of urban drainage plans, the formulation of non-point source pollution control plans, etc.; the second one is suitable for monitoring the water quantity and quality of mixed rainwater and sewage in urban areas during the non-rainy season, and can provide a quantitative basis for the investigation, treatment and implementation effect of urban rainwater and sewage mixing points.

[0088] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Although the present invention has been described in detail with reference to the preferred arrangement scheme, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An automatic monitoring device suitable for the interface between urban drainage and water system, the automatic monitoring device is placed between the urban drainage pipe and the water system river, characterized in that: The automatic monitoring equipment includes a rainwater drainage pipe (1) and a blocking device. The rainwater drainage pipe (1) is divided into three sections, namely, an urban drainage pipe section (103), a water system river section (101), and an equipment section (102). The equipment section (102) is located between the urban drainage pipe section (103) and the water system river section (101). The diameter of the drainage pipe of the equipment section (102) is larger than the diameters of the drainage pipes of the urban drainage pipe section (103) and the water system river section (101), and the equipment section (102) forms an annular step with the urban drainage pipe section (103) and the water system river section (101). The blocking device comprises a blocker base (2), a blocker buffer (4), a pressure sensor (6) and a blocker core (7) arranged in sequence; the blocker base (2) is fixed on the pipe wall of the water system river section (101); the blocker base (2) is connected to the blocker buffer (4); the blocker core (7) is a truncated cone column; the pressure sensor (6) is fixed on the end face of the blocker core (7) facing the water system river; the blocker buffer (4) is provided with a buffer spring (4-2); the buffer spring (4-2) presses the pressure sensor (6) to press the annular conical surface of the truncated cone column of the blocker core (7) on the annular step end face of the urban drainage pipe section (103) to block the path of backflow of the rainwater drainage pipe (1) river channel water; The rain drain pipe (1) is evenly distributed around the outer circle of the urban drainage pipe section (103) and is provided with at least three groups of water quality sensor assemblies. The water quality sensor assembly includes a reset spring (13), a water quality sensor (14) and a traction line (15). One end of the reset spring (13) is fixed to the outer wall of the rain drain pipe (1), and the other end of the reset spring (13) pulls one end of the water quality sensor (14). The other end of the water quality sensor (14) passes through a through hole (17) provided on the pipe wall via the traction line (15) and is connected to the barrier core (7). When the barrier core (7) is flushed open by water from the urban drainage pipe side, the barrier core (7) drives the traction line (15) to pull the water quality sensor (14) through the through hole (17) into the rainwater drainage pipe (1) to perform water quality detection on the water from the urban drainage pipe side, and at the same time, the three traction lines (15) pull the flushed and displaced barrier core (7) to keep it in a stable suspended state; The through hole (17) is arranged on the side wall of the annular step at the connection between the equipment section (102) and the urban drainage pipe section (103); a one-way hinge gate (10) is arranged on the inner side of the side wall of the through hole (17); the one-way hinge gate (10) is in a closed state when the barrier core (7) is not flushed open by water from the urban drainage pipe side.

2. The automatic monitoring equipment for the interface between urban drainage and water system according to claim 1 is characterized in that: The water quality sensor assembly further comprises a sensor fixing frame (11) and a sensor slide rail (12), wherein the sensor fixing frame (11) is fixed on the outer wall of the urban drainage pipe section (103), the water quality sensor (14) is mounted on the sensor slide rail (12), the sensor slide rail (12) is slidably connected to the sensor fixing frame (11), and the water quality sensor (14) is connected to the bracket (16) fixed on the outer wall of the urban drainage pipe section (103) via the reset spring (13).

3. The automatic monitoring equipment for the interface between urban drainage and water system according to claim 1 is characterized in that: A fixed shaft (8) and a guide wheel (9) are provided on the end surface of the barrier core (7) facing the river channel. The traction line (15) is connected to the fixed shaft (8) and then passes around the guide wheel (9) to be connected to the water quality sensor (14).

4. The automatic monitoring equipment for the interface between urban drainage and water system according to claim 1 is characterized in that: The water quality sensor (14) and the pressure sensor (6) are connected to a wireless signal transmitter, which transmits the sensor signal to a remote processor.

5. The automatic monitoring equipment for the interface between urban drainage and water system according to claim 1 is characterized in that: A plurality of limit blocks (5) are evenly arranged around the pipe wall of the water channel section (101), and the limit blocks (5) protrude out of the annular steps of the water channel section (101) to limit the distance that the barrier core (7) is flushed.

6. The automatic monitoring equipment for the interface between urban drainage and water system according to claim 1 is characterized in that: The barrier base (2) is a circular ring, and a filter screen is provided in the middle of the circular ring to prevent the backflow of river water from carrying debris and clogging the rainwater drainage pipe (1).

7. The automatic monitoring equipment for the interface between urban drainage and water system according to claim 1 is characterized in that: The blocking buffer (4) comprises at least three support rods (4-1) and the buffer spring (4-2); the three support rods (4-1) are separated in a conical shape, one end of the separated rods is connected to the blocker base (2) at an equal angle, and the other ends of the three support rods (4-1) are connected to the buffer spring (4-2) via a support column (18).

8. The automatic monitoring equipment for the interface between urban drainage and water system according to claim 7 is characterized in that: The support column (18) is a support column for adjusting the pressure of the buffer spring (4-2). A thread is provided on the outer circle of the support column (18). The buffer spring (4-2) is screwed into the support column (18) along the thread. The pressure of the buffer spring (4-2) on the pressure sensor (6) can be adjusted through the thread of the support column (18).

9. An automatic monitoring method based on the automatic monitoring equipment for the interface between urban drainage and water systems according to claim 1, characterized in that: The monitoring of urban drainage is achieved by acquiring signals from a pressure sensor (6) and a water quality sensor (14) and measuring the horizontal angle of a rainwater drainage pipe (1) relative to a river channel, wherein the water quality sensor (14) includes different element sensor probes arranged according to different water quality indicators; the process is as follows: Step 1: Adjust the buffer spring (4-2) to determine the blocking pressure of the blocking core (7); Step 2: When the barrier core (7) is washed away by rainwater from the urban drainage pipe: The discharge flow rate is calculated by the discharge flow rate formula. Discharge flow formula in: F1 is the blocking pressure of the barrier core (7); is the outlet flow of the rainwater pipe during the specified period, m 3 / s; ρ is the density of water, kg / m 3 ; g is the acceleration due to gravity, m / s 2 ; α is the elevation angle of the rainwater pipe, degrees; t1 and t2 represent the start and end time of the specified period, seconds; The pollution load carried by pipeline water is calculated using the pollution load formula. Pollution load formula in: is the concentration of the i-th water quality indicator in the specified time period, mg / L.

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