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

Abstract

The invention discloses automatic monitoring equipment and method suitable for an urban drainage and water system interface, the automatic monitoring equipment comprises a rain drainage pipe and a blocking device, the rain drainage pipe is divided into three sections including an urban drainage pipeline section, a water system river channel section and an equipment section, and the blocking device comprises a blocking device base, a blocking buffer, a pressure sensor and a blocking core which are arranged in sequence; the blocker base is fixed on the pipe wall of a water system river channel section; the obstructing device base is sequentially connected with an obstructing buffer, a pressure sensor and an obstructing core; a water quality sensor assembly is arranged outside the urban drainage pipeline section and comprises a reset spring, a water quality sensor and a pull wire, one end of the pull wire is connected with the blocking core, and the other end of the pull wire is connected with the water quality sensor. When the blocking core is flushed open by water coming from the urban drainage pipeline side, the pull wire pulls the water quality sensor to enter the rain drainage pipe from the pipe wall through hole so as to detect the water quality of the pipeline water. The one-way water volume and water quality automatic monitoring function of pipeline water is achieved, and the influence of river water backflow on water quality and water volume is overcome.

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 water systems mainly rely on pipeline networks to achieve material transmission between land and water bodies. Among them, pipeline outlets, especially rainwater pipeline outlets, are key water volume and pollutant transmission nodes at the interface of urban water and land, and it is crucial to carry out water quantity and quality monitoring work at them.

[0003] At present, there are two main ways to monitor the water volume and water quality at the outlet of the rainwater pipe: one is manual monitoring, that is, manually monitoring and sampling at the outlet of the rainwater pipe to record 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 not continuous. In addition, when the rain is heavy and the river water level rises rapidly, the monitoring work is somewhat dangerous and is gradually being replaced by automated monitoring equipment; the second is to place flow monitoring instruments in the rainwater pipe, such as Doppler ultrasonic flowmeters, and place water quality sensors next to the flow monitoring instruments to monitor water quality indicators simultaneously. This general monitoring method has achieved synchronous monitoring of the water volume and water quality at the outlet of the rainwater pipe to a certain extent.

[0004] As the operation time of urban rivers increases, sediments at the bottom of the rivers gradually accumulate, occupying part of the river storage capacity, causing the river water level to rise. In addition, in order to improve the water environment quality of rivers and ensure the ecological base flow of rivers, some urban river and lake systems have implemented inter-basin water transfer projects. The increase in ecological water replenishment has also led to the rise of river water levels. It is particularly noteworthy that extreme precipitation events have occurred frequently in urban areas in recent years. Heavy precipitation in a short period of time has caused the river water level to rise rapidly, and even caused the river water to overflow.

[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 throughout the year, 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] In response to the problem 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 the problems of inaccurate flow monitoring and unclear water quality monitoring. First, due to the influence of river water backflow, the flow meter that originally monitored the pipeline water flow was submerged in the river water, and the monitored value was the result of the two-way interaction of pipeline water and river water, which is quite different from the actual pipeline water flow. Second, due to the mixing of pipeline water and river water, the sensor that originally monitored the concentration of pipeline water quality indicators was submerged in the mixture of river water and pipeline water, which is quite different from the actual pipeline water quality concentration. Summary of the invention

[0007] In view of the above problems, the present invention provides an automatic monitoring equipment and method suitable for the interface between urban drainage and water systems. The equipment uses fluid mechanics and spring deformation principles, and according to the relationship between pipeline water thrust, frictional resistance and river water top support force, a one-way fluid barrier is designed that can automatically fit and detach from the pipeline wall. 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 backflows is realized, and supplemented by a water quality sensor, the pollution load carried by the pipeline water outflow can be accurately calculated.

[0008] The present invention is achieved in that:

[0009] An automatic monitoring device suitable for the interface between urban drainage and water system, placed between the urban drainage pipe and the water system river, the automatic monitoring device comprises a rainwater drainage pipe and a blocking 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 equipment section is located between the urban drainage pipe section and the water system river section, the drainage pipe diameter of the equipment section is larger than the drainage pipe diameter of the urban drainage pipe section and the water system river section, and forms a circular step with the urban drainage pipe section and the water system river section respectively;

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

[0011] The rain drainage 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 drainage pipe, the other end of the reset spring pulls one end of the water quality sensor, and the other end of the water quality sensor passes through the through hole provided on the pipe wall through the traction line to connect to the barrier core;

[0012] When the barrier core is flushed open by water from the urban drainage pipe side, the barrier core drives the traction line to pull the water quality sensor through 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, and the water quality sensor is installed on the sensor slide rail. The sensor slide rail is slidably connected to the sensor fixing frame, and 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 arranged in the middle of the circular ring to prevent the backflow of river water from 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, one end of the separated ends is connected to the blocker base at equal angles, and 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 a 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, and 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 suitable for the interface between urban drainage and water system, monitoring of urban drainage is achieved by acquiring signals from pressure sensors and water quality sensors 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, degree; t1 and t2 represent the start and end time of the specified period, s;

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

[0030] Pollution Load Formula

[0031] in:

[0032] is the concentration of the ith water quality index in a specified period of time, 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 backflow path of the river water, and overcome the influence of the 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 the urban pipeline drainage flows out. No water quality monitoring is performed when the river water backflows, and the problem of unclear water quality caused by the mixing of pipeline water and river water is overcome. In addition, the device is easy to disassemble and maintain. The device 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 in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure 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 It 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 waterless 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 water are equal;

[0040] Figure 6 It is 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 It is 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] Embodiment 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 groove-shaped profile folded ring, and 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 comprises a barrier base 2, a barrier buffer 4, a pressure sensor 6 and a barrier core 7 arranged in sequence; the sequence is arranged in sequence from the water system river side of the rainwater drainage pipe 1 to the urban drainage pipe side; the barrier base 2 is fixed on the pipe wall of the water system river section 101; the barrier base 2 is connected to the barrier buffer 4, the barrier core 7 is a frustum column, the pressure sensor 6 is fixed on the end face of the barrier core 7 facing the water system river side, and the end face of the barrier core 7 facing the water system river side is provided with a fixed shaft 8 and a guide wheel 9;

[0047] A plurality of limit blocks 5 are evenly arranged around the pipe wall of the water system river section 101. The limit blocks 5 extend out of the annular steps of the water system river section 101. When the water flow in the pipeline is too large, the barrier core 7 is impacted by the urban pipeline water flow and moves toward the water system river section. When the barrier core 7 moves to a certain position, it will be blocked by the limit blocks 5. Even in this case, the pipeline water can still flow out smoothly from the gap between the limit blocks 5. Under special water flow conditions, the position of the barrier core 7 can be restricted to a certain extent to maintain the stability and functionality of the device, and the normal flow of pipeline water can be guaranteed to avoid water flow obstruction due to the movement of the barrier core 7 or other factors, thereby ensuring the continuation of the entire pipeline water delivery 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, and the buffer spring 4-2 presses on the pressure sensor 6 to elastically press the annular conical surface of the cone column of the blocking core 7 against the annular step end surface of the urban drainage pipe section 103 to block the passage of the river water of the rainwater drainage pipe 1 backflow;

[0050] The rainwater drainage 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 components include 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, and 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. 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 through the through hole 17 into the rainwater drainage pipe 1 to detect the water quality of 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.

[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. The through hole 17 is provided with a one-way hinge gate 10 on the inner side of the side wall. 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 is composed of a front-end water quality index sensing probe and a rear-end water quality monitoring power supply, storage and transmission device. The front-end water quality index sensing probe can integrate the monitoring of chemical oxygen demand, ammonia nitrogen, total phosphorus and dissolved oxygen, and the monitoring frequency is one set every 10 seconds. The rear-end water quality monitoring power supply, storage and transmission device is powered by 12V voltage, the storage uses a 128G memory card, and the transmission device uses 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 pipeline water flow 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 pressing welding, and the other end of the support rod 4-1 is connected to the buffer spring 4-2 through a support column 18. A detachable stainless steel filter screen is arranged in the middle of the ring of the barrier base 2 to prevent the backflow of river water from carrying debris to block the rainwater drainage pipe 1. When the water in the urban drainage pipe flows out of the river, the debris intercepted by the filter screen can be automatically carried back to the river to ensure the continuous smoothness and effective operation of the pipeline system.

[0054] The adjustable 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 set 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, the river water will flow back. 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 no water quality monitoring is 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] Embodiment 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] Embodiment 3;

[0060] An automatic monitoring method applicable to the interface between urban drainage and water system is based on the calculation method of the automatic monitoring equipment applicable to the interface between urban drainage and water system in Example 1. The content of Example 1 is applicable to this embodiment. The method uses 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 fitting relationship between the barrier core 7 and the rainwater pipe wall is automatically adjusted by fluid thrust to realize the rapid formation of a unidirectional water flow path in the pipe. Taking into account the force of the barrier core 7, the calculation formula for the rainwater pipe outlet flow rate and pollution load is derived as follows:

[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 be displayed as 0. The following describes the pressure value of the pressure sensor 6 in three cases;

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

[0063] 2. If Figure 6 As shown, when the water pressure of the river water is greater than the water pressure of the pipeline water, the river water backflow phenomenon occurs, and the pipeline water cannot flow out 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 is not deformed, and the pressure sensor 6 shows 0.

[0064] 3. If Figure 7 As shown, when the water pressure of the river water is lower than the water pressure of the pipe water, the pipe water pushes the barrier core 7 to move toward the outlet, a water flow path is generated between the barrier core 7 and the rainwater drainage pipe 1, and the pipe water flows toward the outlet. At the same time, the barrier core 7 pulls the water quality sensor 14 from the one-way hinge gate 10 into the rainwater drainage pipe 1 through the traction line 15 to monitor the water quality of the pipe water simultaneously. At this time, the pressure sensor 6 records the pressure generated by the displacement of the barrier core 7 toward the pipe outlet.

[0065] like Figure 8 As shown, 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 friction resistance of the pipeline water against the pipe wall and the jacking force of the river water. This comprehensive result can be characterized by the dynamic variable of pipeline flow, as shown 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 number F1 of the pressure sensor 6 is equal to 0, it means that the water thrust of the pipeline is less than or equal to the friction resistance and the lifting force, that is, there is no water in the rainwater pipeline or the water pressure in the rainwater pipeline is less than or equal to the backflow pressure of the river water, and at this time, there is no flow out of the rainwater pipeline outlet. When the displayed number F1 of the pressure sensor 6 is greater than 0, it means that the water thrust of the pipeline is greater than the friction resistance and the lifting force, that is, the water pressure in the rainwater pipeline is greater than the backflow pressure of the river water, and at this time, there is flow out of the rainwater pipeline outlet. The meaning of the displayed number 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:

[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 by 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 by 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, degrees; t1 and t2 respectively represent the start and end time of the specified time period, 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 by the pollution load formula:

[0083] Pollution load formula: is the concentration of the ith water quality index in a specified period of time, 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 top support force, so as to realize 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 backflows, and assisted by water quality sensors, 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, and successfully overcomes 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 pipeline flows out normally, a specific water flow path can be formed, and 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 pipeline outflow. On the other hand, the barrier core is pushed to move by the pipeline water, and the water quality sensor is further pulled to move, realizing the effect of "transmitting force by borrowing force", that is, the water quantity and water quality are synchronously sensed when the pipeline flows out, and the water quantity and water quality are no longer monitored when the river water backflows, which overcomes the problem of unclear water quality caused by the mixing of pipeline 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 top support force. The pressure sensor display is further characterized by the pipeline flow rate, and the flow calculation value is revised in combination with the hydraulic gradient of the rainwater pipe, thereby solving the problem of inaccurate measurement of pipeline water flow rate caused by irregular river backflow under complex hydraulic connections.

[0087] The embodiments meet the requirements of multiple application scenarios. The first one is suitable for the water quantity and quality monitoring of urban pipe drainage and sewage in the rainy season, which can provide a quantitative basis for the formulation of urban drainage planning, non-point source pollution control plans, etc.; the second one is suitable for the water quantity and quality monitoring of urban rainwater and sewage mixing in the non-rainy season, which 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 rather than to limit it. Although the present invention is described in detail with reference to the preferred arrangement scheme, a person skilled in the art should understand that the technical solution of the present invention can 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 comprises 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 drainage pipe diameter of the equipment section (102) is larger than the drainage pipe diameters of the urban drainage pipe section (103) and the water system river section (101), and the equipment section (102) forms a circular step with the urban drainage pipe section (103) and the water system river section (101). The blocking device comprises a blocking device base (2), a blocking buffer (4), a pressure sensor (6) and a blocking core (7) arranged in sequence; the blocking device base (2) is fixed on the pipe wall of the water system river section (101); the blocking device base (2) is connected to the blocking buffer (4), the blocking core (7) is a frustum column, and the pressure sensor (6) is fixed on the end surface of the blocking core (7) facing the water system river; the blocking buffer (4) is provided with a buffer spring (4-2), and the buffer spring (4-2) presses the annular conical surface of the frustum column of the blocking core (7) on the pressure sensor (6) to press the annular conical surface of the frustum column of the urban drainage pipe section (103) to block the path of the backflow of the rainwater drainage pipe (1) river water; The rain drainage 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 comprising 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 drainage pipe (1), the other end of the reset spring (13) pulls one end of the water quality sensor (14), and the other end of the water quality sensor (14) passes through a through hole (17) provided on the pipe wall through 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. At the same time, the three traction lines (15) hold the flushed and displaced barrier core (7) to keep it in a stable suspended state.

2. The automatic monitoring equipment for the interface between urban drainage and water system according to claim 1 is characterized in that: 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), and a one-way hinged gate (10) is arranged on the inner side of the side wall of the through hole (17). The one-way hinged gate (10) is in a closed state when the barrier core (7) is not flushed open by water from the urban drainage pipe side.

3. 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 comprises 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 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).

4. 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, and 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).

5. 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.

6. 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.

7. 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 net is arranged in the middle of the circular ring to prevent the river water from flowing back and carrying debris to block the rainwater drainage pipe (1).

8. 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).

9. The automatic monitoring equipment for the interface between urban drainage and water system according to claim 8, 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).

10. An automatic monitoring method based on the automatic monitoring equipment for the interface between urban drainage and water system as claimed in 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 the rainwater drainage pipe (1) relative to the river channel of the water system, wherein the water quality sensor (14) includes different element sensor probes arranged according to different water quality indicators; the process is: The first step: adjusting 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, degree; t1 and t2 represent the start and end time of the specified period, s; The pollution load carried by pipeline water is calculated by the pollution load formula. Pollution Load Formula in: is the concentration of the ith water quality index in a specified period of time, mg / L.

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