Municipal pipeline flushing discharge water quality monitoring device and monitoring method

Abstract

The invention discloses a municipal pipeline flushing and discharging water quality monitoring device and method. The device comprises a box body, a secondary pressure reducing valve arranged in the box body, a turbidity detection flow path system, a residual chlorine detection flow path system and a wastewater tank, the turbidity detection flow path system and the residual chlorine detection flow path system are respectively connected with two water outlets of the secondary pressure reducing valve, and a water inlet of the secondary pressure reducing valve is connected with a pipeline to be detected. According to the invention, the workload of manual sampling and detection of pipeline flushing water is reduced, the situation of water splashing during sampling can be avoided, the water quality in the flushing process can be continuously monitored, the situation that flushing is stopped when the flushing requirement is not met or flushing is still continued when flushing is qualified due to an accidental water quality result is avoided, and the water quality change situation in the flushing process can be preserved; and subsequent analysis and processing are facilitated, and a more targeted pipeline maintenance plan is made.

Description

Technical Field

[0001] The invention relates to the technical field of municipal pipeline flushing and discharge operation and water quality monitoring devices, and in particular to a municipal pipeline flushing and discharge water quality monitoring device and a monitoring method. Background Art

[0002] Pipeline flushing is an important measure to ensure pipeline water quality. According to national and local standards at all levels, pipeline flushing must be carried out before grid connection, after water outage, and when water quality is abnormal. At the same time, fire hydrants must be discharged every quarter for pipeline flushing. Specific requirements are shown in Table 1. During pipeline flushing, the water quality in the pipeline needs to be tested in a timely manner, and the flushing operation can be stopped based on the test results to determine whether it meets the requirements.

[0003] Table 1 Pipeline flushing related standards

[0004]

[0005]

[0006] The current pipeline flushing water quality testing process is as follows: manual sampling is performed after the flushing water is observed to be relatively clear, and on-site testing is performed from time to time with portable turbidity and free chlorine detection instruments. If it fails, flushing is continued until the test results meet the requirements and then the flushing is stopped. For some scenarios where other indicators need to be tested, the samples are taken and sent to the testing agency. Fire hydrants are generally flushed for 10 minutes for regular discharge, while flushing after water outages and when the water quality is abnormal may take several hours.

[0007] The current flushing water quality testing scheme has the following defects:

[0008] 1. Inconvenient operation

[0009] After the water is clear as observed with the naked eye, it is often necessary to continue to add water to meet the requirements, so multiple sampling and testing are required; at the same time, due to the fast water flow rate and small capacity of the test bottle, there will be a large degree of splashing during sampling, which poses a certain degree of difficulty and danger.

[0010] 2. Flushing effect is difficult to guarantee

[0011] There is a certain degree of randomness in water quality, and sampling once or twice cannot guarantee that the piped water quality has continued to stably meet the requirements.

[0012] 3. May cause waste

[0013] Since sampling and testing are not carried out frequently, there may be a situation where the water quality is qualified but it is still discharged, resulting in water waste. If the total flushing time reaches more than 1 hour, the waste may be more obvious.

[0014] 4. The process is difficult to trace, and requires high awareness of personnel

[0015] Because the water quality during the flushing process is difficult to trace, if the personnel are not self-conscious, flushing may be stopped if the water quality does not meet the standards.

[0016] 5. It is difficult to record the changes in water quality during the flushing process

[0017] Since only a limited number of water quality sampling and manual testing are performed during the flushing process, it is difficult to fully record the changes in water quality during the entire flushing process, resulting in data loss. Summary of the invention

[0018] The main purpose of the present invention is to propose a municipal pipeline flushing discharge water quality monitoring device and monitoring method, which aims to reduce the workload of manual sampling and detection of discharge water during pipeline flushing, avoid water splashing during sampling, and continuously monitor the water quality of the flushing process to avoid accidental water quality results that lead to stopping flushing when flushing requirements are not met or continuing flushing when the flushing is qualified. In addition, the water quality changes during the flushing process can be saved to facilitate subsequent analysis and processing and formulate a more targeted pipeline maintenance plan.

[0019] To achieve the above-mentioned object, the present invention provides a municipal pipeline flushing discharge water quality monitoring device, comprising: a box body, a secondary pressure reducing valve, a turbidity detection flow path system, a residual chlorine detection flow path system and a wastewater tank arranged in the box body;

[0020] The turbidity detection flow path system and the residual chlorine detection flow path system are respectively connected to the two water outlets of the secondary pressure reducing valve, and the water inlet of the secondary pressure reducing valve is connected to the pipeline to be detected.

[0021] The turbidity detection flow path system includes a turbidity detection module, a turbidity detection water inlet pipeline, a turbidity detection drainage pipeline and a turbidity detection overflow pipeline, one end of the turbidity detection water inlet pipeline is connected to one end of the secondary pressure reducing valve, the other end of the turbidity detection water inlet pipeline is connected to the water inlet of the turbidity detection module, a flow meter A is provided on the turbidity detection water inlet pipeline, one end of the turbidity detection drainage pipeline is connected to the drainage outlet of the turbidity detection module, and the other end is connected to the waste water tank, a turbidity drainage ball valve is provided on the turbidity detection drainage pipeline, one end of the turbidity detection overflow pipeline is connected to the overflow outlet of the turbidity detection module, and the other end is connected to the waste water tank;

[0022] The residual chlorine detection flow path system includes a residual chlorine detection module, a residual chlorine detection water inlet pipeline, a residual chlorine detection drainage pipeline and a residual chlorine detection overflow pipeline. One end of the residual chlorine detection water inlet pipeline is connected to one end of the secondary pressure reducing valve, and the other end of the residual chlorine detection water inlet pipeline is connected to the water inlet of the residual chlorine detection module. A flow meter B is arranged on the residual chlorine detection water inlet pipeline, one end of the residual chlorine detection drainage pipeline is connected to the drainage outlet of the residual chlorine detection module, and the other end is connected to the wastewater tank. A residual chlorine drainage ball valve is arranged on the residual chlorine detection drainage pipeline, one end of the residual chlorine detection overflow pipeline is connected to the overflow outlet of the residual chlorine detection module, and the other end is connected to the wastewater tank.

[0023] A further technical solution of the present invention is that the wastewater tank is connected to an external drainage pipeline.

[0024] A further technical solution of the present invention is that a display component, a power module, a data storage device and a mainboard controller are arranged in the box, and the display component, the power module and the data storage device are respectively connected to the mainboard controller.

[0025] A further technical solution of the present invention is that the display component includes a display screen, a signal light and a switch, and the display screen, the signal light and the switch are respectively connected to the mainboard controller.

[0026] A further technical solution of the present invention is that a water inlet and a water outlet are provided at the bottom of the box body, the water outlet is connected to the external drainage pipeline, and the water inlet is connected to an external fire hydrant.

[0027] A further technical solution of the present invention is that the water inlet is connected to the pipeline to be tested through a water inlet pipe. When performing water quality monitoring, the pipeline to be tested is connected to a tee. One end of the water inlet pipe is connected to the secondary pressure reducing valve, and the other end is connected to one end of the tee. A manual ball valve and a pressure reducing valve with a pressure gauge are provided on the water inlet pipe.

[0028] A further technical solution of the present invention is that a telescopic rod and a lifting handle are arranged on the top of the outer box, universal wheels and supporting feet are arranged on the bottom, and a back plate is arranged on the rear side of the outer box.

[0029] A further technical solution of the present invention is that both the turbidity detection module and the residual chlorine detection module adopt electrode method for detection.

[0030] A further technical solution of the present invention is that the detection range of the turbidity detection module is 0-100NTU, and the detection error is ±2% or 0.01NTU, whichever is greater; the detection range of the residual chlorine detection module is 0-2mg / L, and the detection error is ±5% or 0.03mg / L, whichever is greater.

[0031] To achieve the above object, the present invention also proposes a municipal pipeline flushing discharge water quality monitoring method, the method is applied to the municipal pipeline flushing discharge water quality monitoring device as described above, the method comprises the following steps:

[0032] Step S10, operation preparation: connection, inspection and debugging of the equipment before startup, including battery power check, flow adjustment and setting of flushing qualification index requirements, wherein the flushing qualification index includes turbidity index, free chlorine index and duration index;

[0033] Step S20, start flushing monitoring: open the pipeline to be tested for flushing, click the "Start Flushing" button on the display screen, and enter the name of the flushing pipeline to start pipeline flushing and water quality monitoring;

[0034] Step S30, flushing process: continuously monitor the turbidity and free chlorine of the flushing drainage, display the real-time values ​​on the display screen, and store the data in a file named after the pipe in real time;

[0035] Step S40, end flushing: After the equipment detects that the turbidity index, free chlorine index and continuous index meet the qualified requirements, it automatically issues a reminder to end flushing. After the user confirms and clicks "End Flushing", the switch of the pipeline to be tested is turned off and the connection between the equipment and the pipeline to be tested is disconnected, completing the pipeline flushing water quality detection work.

[0036] The beneficial effects of the municipal pipeline flushing discharge water quality monitoring device and method of the present invention are:

[0037] The present invention utilizes online monitoring means to replace manual sampling and detection. When in use, the detection device is connected to the fire hydrant through a tee, so that the municipal pipeline flushing discharge water enters the flow system of the device through the fire hydrant, and completes the turbidity and free chlorine detection through the turbidity detection module and the residual chlorine detection module. At the same time, the detection result is output and it is judged whether the flushing requirement is met, and the user is prompted whether the flushing can be ended, thereby reducing the workload of manual sampling and detection, avoiding the situation of water splashing during sampling, and continuously monitoring the water quality of the flushing process, avoiding the situation that the flushing requirement is not met due to accidental water quality results, and the flushing is stopped or the flushing is continued even if the flushing is qualified. Moreover, the water quality change during the flushing process can be saved, which is convenient for subsequent analysis and processing and the formulation of a more targeted pipeline maintenance plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0039] Figure 1 It is a flow path diagram of a preferred embodiment of the municipal pipeline flushing discharge water quality monitoring device of the present invention;

[0040] Figure 2 It is a schematic diagram of the internal structure of a preferred embodiment of the municipal pipeline flushing discharge water quality monitoring device of the present invention;

[0041] Figure 3 It is a schematic diagram of the overall structure of a preferred embodiment of the municipal pipeline flushing discharge water quality monitoring device of the present invention;

[0042] Figure 4 It is a schematic diagram of the overall structure from another angle of a preferred embodiment of the municipal pipeline flushing and discharge water quality monitoring device of the present invention;

[0043] Figure 5 It is a schematic diagram of the use status of a preferred embodiment of the municipal pipeline flushing discharge water quality monitoring device of the present invention;

[0044] Figure 6 It is a schematic flow chart of the municipal pipeline flushing discharge water quality monitoring method of the present invention.

[0045] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0046] Description of Figure Numbers:

[0047] Box body 1; two-stage pressure reducing valve 2; waste water tank 3; turbidity detection module 4; turbidity detection water inlet pipeline 5; turbidity detection overflow pipeline 6; turbidity drainage ball valve 7; residual chlorine detection module 8; residual chlorine detection water inlet pipeline 9; residual chlorine detection overflow pipeline 10; residual chlorine drainage ball valve 11; power module 12; mainboard controller 13; display screen 14; signal light 15; switch 16; three-way 17; manual ball valve 18; pressure reducing valve 19; telescopic rod 20; lifting handle 21; universal wheel 22; support leg 23; backboard 24; water inlet 25; water outlet 26; fire hydrant 27. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The present invention proposes a municipal pipeline flushing discharge water quality monitoring device. The present invention utilizes online monitoring means to replace manual sampling and detection. When in use, the detection device is connected to a fire hydrant through a tee, so that the municipal pipeline flushing discharge water enters the flow path system of the device through the fire hydrant, and completes turbidity and free chlorine detection through a turbidity detection module and a residual chlorine detection module. At the same time, the detection results are output and it is determined whether the flushing requirements are met, and the user is prompted whether the flushing can be ended.

[0050] The present invention reduces the workload of manual sampling and testing, avoids water splashing during sampling, and can continuously monitor the water quality during the flushing process to avoid the situation where accidental water quality results lead to stopping flushing when flushing requirements are not met or continuing flushing when flushing is qualified. The water quality changes during the flushing process can be saved to facilitate subsequent analysis and processing and to formulate a more targeted pipeline maintenance plan.

[0051] For details, please refer to Figures 1 to 5 A preferred embodiment of the municipal pipeline flushing discharge water quality monitoring device of the present invention comprises: a box body 1, a secondary pressure reducing valve 2, a turbidity detection flow path system, a residual chlorine detection flow path system and a wastewater tank 3 arranged in the box body 1.

[0052] The turbidity detection flow path system and the residual chlorine detection flow path system are respectively connected to the two water outlets of the secondary pressure reducing valve 2, and the water inlet of the secondary pressure reducing valve 2 is connected to the pipeline to be detected.

[0053] The pipeline to be tested may be a municipal pipeline, which is connected to the fire hydrant 27 .

[0054] The turbidity detection flow system is used to detect the turbidity of the drainage from the pipeline to be tested, and the residual chlorine detection flow system is used to detect the residual chlorine in the drainage from the pipeline to be tested. These parameters can be displayed in real time on the display screen 14, and historical data records can be viewed (in the form of a line graph). The monitoring data of 9 consecutive sites can be stored and can be connected to a U disk to export in the form of EXCEL.

[0055] The turbidity detection flow path system includes a turbidity detection module 4, a turbidity detection water inlet pipeline 5, a turbidity detection drainage pipeline and a turbidity detection overflow pipeline 6, one end of the turbidity detection water inlet pipeline 5 is connected to one end of the secondary pressure reducing valve 2, and the other end of the turbidity detection water inlet pipeline 5 is connected to the water inlet of the turbidity detection module 4, a flow meter A is provided on the turbidity detection water inlet pipeline 5, one end of the turbidity detection drainage pipeline is connected to the drainage outlet of the turbidity detection module 4, and the other end is connected to the wastewater tank 3, a turbidity drainage ball valve 7 is provided on the turbidity detection drainage pipeline, one end of the turbidity detection overflow pipeline 6 is connected to the overflow outlet of the turbidity detection module 4, and the other end is connected to the wastewater tank 3.

[0056] The residual chlorine detection flow path system includes a residual chlorine detection module 8, a residual chlorine detection water inlet pipeline 9, a residual chlorine detection drainage pipeline and a residual chlorine detection overflow pipeline 10, one end of the residual chlorine detection water inlet pipeline 9 is connected to one end of the secondary pressure reducing valve 2, and the other end of the residual chlorine detection water inlet pipeline 9 is connected to the water inlet of the residual chlorine detection module 8, a flow meter B is arranged on the residual chlorine detection water inlet pipeline 9, one end of the residual chlorine detection drainage pipeline is connected to the drainage outlet of the residual chlorine detection module 8, and the other end is connected to the wastewater tank 3, a residual chlorine drainage ball valve 11 is arranged on the residual chlorine detection drainage pipeline, one end of the residual chlorine detection overflow pipeline 10 is connected to the overflow outlet of the residual chlorine detection module 8, and the other end is connected to the wastewater tank 3.

[0057] In this embodiment, the waste water tank 3 is connected to an external drainage pipeline.

[0058] In this embodiment, a display component, a power module 12, a data storage device and a mainboard controller 13 are disposed in the housing 1, and the display component, the power module 12 and the data storage device are connected to the mainboard controller 13 respectively.

[0059] In this embodiment, the display component includes a display screen 14 , a signal light 15 and a switch 16 , and the display screen 14 , the signal light 15 and the switch 16 are respectively connected to the mainboard controller 13 .

[0060] In this embodiment, a water inlet 25 and a water outlet 26 are provided at the bottom of the box body 1. The water outlet 26 is communicated with the external drainage pipeline, and the water inlet 25 is connected to the pipeline to be detected.

[0061] In this embodiment, the water inlet is connected to the pipeline to be tested through a water inlet pipe. When performing water quality monitoring, the pipeline to be tested is connected to the tee 17. One end of the water inlet pipe is connected to the secondary pressure reducing valve 2, and the other end is connected to one end of the tee 17. A manual ball valve 18 and a pressure reducing valve 19 with a pressure gauge are provided on the water inlet pipe.

[0062] In this embodiment, the interface A of the tee 17 can adopt a standard fire interface DN65, or can be adjusted to a standard fire interface of other calibers according to the specifications of the fire hydrant, and the interface B monitoring equipment water inlet should use a two-point water inlet hard pipe. Interface B is the water inlet of the monitoring equipment and should be connected to a two-point water inlet hard pipe. The existing 20-inner or outer thread conversion union joint solution can be considered.

[0063] It is recommended that the interface C of the tee 17 is smaller than or equal to the interface A, which needs to be determined based on the actual test results. Considering the connection of the drain pipe, it is recommended to use the standard interface DN32 or DN40. After the diameter of the interface C is confirmed, the corresponding drain pipe and connector need to be selected, and the convenience of disassembly, portability, and water pressure should be considered. The fire hydrant 27 cannot be connected to the interface A using a hose or a pagoda. Due to the high water pressure, a hard pipe can be connected with an internal or external thread.

[0064] In this embodiment, a telescopic rod 20 and a lifting handle 21 are provided on the top of the outer box, a universal wheel 22 and a supporting foot 23 are provided on the bottom, and a back plate 24 is provided on the rear side of the outer box.

[0065] In this embodiment, it is characterized in that the turbidity detection module 4 and the residual chlorine detection module 8 both adopt electrode method for detection.

[0066] In this embodiment, the detection range of the turbidity detection module 4 is 0-100NTU, and the detection error is ±2% or 0.01NTU, whichever is greater. The detection range of the residual chlorine detection module 8 is 0-2mg / L, and the detection error is ±5% or 0.03mg / L, whichever is greater.

[0067] The beneficial effects of the municipal pipeline flushing discharge water quality monitoring device of the present invention are:

[0068] The present invention utilizes online monitoring means to replace manual sampling and detection. When in use, the detection device is connected to the fire hydrant through a tee, so that the municipal pipeline flushing discharge water enters the flow system of the device through the fire hydrant, and completes the turbidity and free chlorine detection through the turbidity detection module and the residual chlorine detection module. At the same time, the detection result is output and it is judged whether the flushing requirement is met, and the user is prompted whether the flushing can be ended, thereby reducing the workload of manual sampling and detection, avoiding the situation of water splashing during sampling, and continuously monitoring the water quality of the flushing process, avoiding the situation that the flushing requirement is not met due to accidental water quality results, and the flushing is stopped or the flushing is continued even if the flushing is qualified. Moreover, the water quality change during the flushing process can be saved, which is convenient for subsequent analysis and processing and the formulation of a more targeted pipeline maintenance plan.

[0069] To achieve the above object, the present invention also proposes a method for monitoring the quality of water discharged from municipal pipeline flushing, which is applied to the above-mentioned municipal pipeline flushing discharge water quality monitoring device, please refer to Figure 6 , the method comprises the following steps:

[0070] Step S10, operation preparation: connection, inspection and debugging work are performed before the equipment is started, including battery power check, flow adjustment and setting of flushing qualification index requirements, wherein the flushing qualification index includes turbidity index, free chlorine index and duration index.

[0071] Step S10 specifically includes the following steps:

[0072] (1) Operation preparation:

[0073] A. Before starting the equipment, first connect the device to the fire hydrant outlet of the municipal pipeline to be discharged through a tee to avoid the situation where the pipeline is not connected properly and causes a large amount of leakage.

[0074] B. Close the turbidity drain ball valve and the residual chlorine drain ball valve.

[0075] C. Open the water inlet valve of the turbidity detection module and it is recommended to adjust the flow rate to about 350mL / min.

[0076] D. Open the water inlet valve of the residual chlorine detection module and it is recommended to adjust the flow rate to about 500mL / min.

[0077] E. Check whether the main battery has sufficient power and whether the battery needs to be replaced.

[0078] F. Check to make sure the drain pipe remains connected to the atmosphere and has no bends to ensure smooth drainage and avoid leakage.

[0079] (2) Input flushing requirements:

[0080] Specifically, according to work requirements, requirements for the end of flushing can be entered, including turbidity qualification standards, free chlorine qualification standards and duration.

[0081] It should be noted that duration refers to the time during which the water quality monitoring results continue to meet the qualification requirements, mainly to avoid the misjudgment that flushing can be stopped due to the water quality instantly meeting the standards caused by water quality fluctuations.

[0082] Step S20, start flushing monitoring: open the pipeline to be tested for flushing, click the "Start Flushing" button on the display screen, and enter the name of the flushing pipeline to start pipeline flushing and water quality monitoring.

[0083] Specifically, after confirming that the operation of the equipment is done, start the equipment.

[0084] (1) Enter the pipe name.

[0085] (2) Click “Start Rinse”.

[0086] After clicking, the flushing status changes to start and the indicator light flashes (the light flashes in red, which means that the flushing requirements have not been met and flushing needs to continue). At this time, the screen continuously outputs the real-time monitoring results of turbidity and free chlorine and the flushing time.

[0087] Step S30, flushing process: continuously monitor the turbidity and free chlorine of the flushing drainage, display the real-time values ​​on the display screen, and store the data in a file named after the pipe in real time;

[0088] Step S40, end flushing: after the equipment detects that the turbidity index, free chlorine index and duration index have reached the qualified requirements, it automatically issues a reminder to end flushing. After the user confirms and clicks "End Flushing", the switch of the pipeline to be tested is turned off and the connection between the equipment and the pipeline to be tested is disconnected, completing the pipeline flushing water quality detection work.

[0089] Step S40 specifically includes:

[0090] (1) When the monitoring results meet the flushing requirements entered previously, the system will pop up a dialog box to remind you to end the flushing and switch the flashing light to green. The user can click "Confirm end of flushing" to complete the water quality monitoring. At the same time, the water quality monitoring results of the cleaning process (referring to the process from clicking "Start flushing" to clicking "Confirm end of flushing") will be automatically saved to the TF card and the screen. There is no need to export the data after the flushing is completed.

[0091] (2) Simply connect the disconnect device to the fire hydrant.

[0092] The beneficial effects of the municipal pipeline flushing discharge water quality monitoring method of the present invention are:

[0093] The present invention utilizes online monitoring means to replace manual sampling and detection. When in use, the detection device is connected to the fire hydrant through a tee, so that the municipal pipeline flushing discharge water enters the flow system of the device through the fire hydrant, and completes the turbidity and free chlorine detection through the turbidity detection module and the residual chlorine detection module. At the same time, the detection result is output and it is judged whether the flushing requirement is met, and the user is prompted whether the flushing can be ended, thereby reducing the workload of manual sampling and detection, avoiding the situation of water splashing during sampling, and continuously monitoring the water quality of the flushing process, avoiding the situation that the flushing requirement is not met due to accidental water quality results, and the flushing is stopped or the flushing is continued even if the flushing is qualified. Moreover, the water quality change during the flushing process can be saved, which is convenient for subsequent analysis and processing and the formulation of a more targeted pipeline maintenance plan.

[0094] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A municipal pipeline flushing discharge water quality monitoring device, characterized in that: include: A box body, a secondary pressure reducing valve, a turbidity detection flow path system, a residual chlorine detection flow path system and a wastewater tank arranged in the box body; The turbidity detection flow path system and the residual chlorine detection flow path system are respectively connected to the two water outlets of the secondary pressure reducing valve, and the water inlet of the secondary pressure reducing valve is connected to the pipeline to be detected; The turbidity detection flow path system includes a turbidity detection module, a turbidity detection water inlet pipeline, a turbidity detection drainage pipeline and a turbidity detection overflow pipeline, one end of the turbidity detection water inlet pipeline is connected to one end of the secondary pressure reducing valve, the other end of the turbidity detection water inlet pipeline is connected to the water inlet of the turbidity detection module, a flow meter A is provided on the turbidity detection water inlet pipeline, one end of the turbidity detection drainage pipeline is connected to the drainage outlet of the turbidity detection module, and the other end is connected to the waste water tank, a turbidity drainage ball valve is provided on the turbidity detection drainage pipeline, one end of the turbidity detection overflow pipeline is connected to the overflow outlet of the turbidity detection module, and the other end is connected to the waste water tank; The residual chlorine detection flow path system includes a residual chlorine detection module, a residual chlorine detection water inlet pipeline, a residual chlorine detection drainage pipeline and a residual chlorine detection overflow pipeline. One end of the residual chlorine detection water inlet pipeline is connected to one end of the secondary pressure reducing valve, and the other end of the residual chlorine detection water inlet pipeline is connected to the water inlet of the residual chlorine detection module. A flow meter B is arranged on the residual chlorine detection water inlet pipeline, one end of the residual chlorine detection drainage pipeline is connected to the drainage outlet of the residual chlorine detection module, and the other end is connected to the wastewater tank. A residual chlorine drainage ball valve is arranged on the residual chlorine detection drainage pipeline, one end of the residual chlorine detection overflow pipeline is connected to the overflow outlet of the residual chlorine detection module, and the other end is connected to the wastewater tank.

2. The municipal pipeline flushing discharge water quality monitoring device according to claim 1 is characterized in that: The waste water tank is connected to an external drainage pipeline.

3. The municipal pipeline flushing discharge water quality monitoring device according to claim 1 is characterized in that: The box body is provided with a display component, a power module, a data storage device and a mainboard controller, and the display component, the power module and the data storage device are respectively connected to the mainboard controller.

4. The municipal pipeline flushing discharge water quality monitoring device according to claim 3 is characterized in that: The display assembly comprises a display screen, a signal light and a switch, and the display screen, the signal light and the switch are respectively connected to the mainboard controller.

5. The municipal pipeline flushing discharge water quality monitoring device according to claim 2 is characterized in that: A water inlet and a water outlet are provided at the bottom of the box body, the water outlet is communicated with the external drainage pipeline, and the water inlet is connected to an external fire hydrant.

6. The municipal pipeline flushing discharge water quality monitoring device according to claim 5 is characterized in that: The water inlet is connected to the pipeline to be tested through a water inlet pipe. When performing water quality monitoring, the pipeline to be tested is connected to a tee. One end of the water inlet pipe is connected to the secondary pressure reducing valve, and the other end is connected to one end of the tee. A manual ball valve and a pressure reducing valve with a pressure gauge are provided on the water inlet pipe.

7. The municipal pipeline flushing discharge water quality monitoring device according to claim 1 is characterized in that: The top of the outer box is provided with a telescopic rod and a lifting handle, the bottom is provided with universal wheels and supporting feet, and the rear side of the outer box is provided with a back plate.

8. The municipal pipeline flushing discharge water quality monitoring device according to any one of claims 1 to 7, characterized in that: The turbidity detection module and the residual chlorine detection module both adopt electrode method for detection.

9. The municipal pipeline flushing discharge water quality monitoring device according to claim 8 is characterized in that: The detection range of the turbidity detection module is 0-100NTU, and the detection error is ±2% or 0.01NTU, whichever is greater. The detection range of the residual chlorine detection module is 0-2mg / L, and the detection error is ±5% or 0.03mg / L, whichever is greater.

10. A method for monitoring the quality of water discharged from municipal pipeline flushing, characterized in that: The method is applied to the municipal pipeline flushing discharge water quality monitoring device as claimed in any one of claims 1 to 9, and the method comprises the following steps: Step S10, operation preparation: connection, inspection and debugging of the equipment before startup, including battery power check, flow adjustment and setting of flushing qualification index requirements, wherein the flushing qualification index includes turbidity index, free chlorine index and duration index; Step S20, start flushing monitoring: open the pipeline to be tested for flushing, click the "Start Flushing" button on the display screen, and enter the name of the flushing pipeline to start pipeline flushing and water quality monitoring; Step S30, flushing process: continuously monitor the turbidity and free chlorine of the flushing drainage, display the real-time values ​​on the display screen, and store the data in a file named after the pipe in real time: Step S40, end flushing: After the device detects that the turbidity index, free chlorine index and duration index meet the qualified requirements, it automatically issues a reminder to end flushing. After the user confirms and clicks "End Flushing", the switch of the pipeline to be tested is turned off and the connection between the device and the pipeline to be tested is disconnected, completing the pipeline flushing water quality detection work.

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