A water quality monitoring device for drainage system

Abstract

The present invention discloses a water quality monitoring device for a drainage system, which relates to the technical field of water body analysis and testing, and is used to overcome the problem that the online monitoring feedback parameters of the physical and chemical characteristics of water body pollution factors have low credibility and are difficult to capture the analysis and testing points. The present invention mainly delays the interaction process between the analysis component and the analysis and testing water flow by setting a flow detection channel, a counterweight filter plate, an analysis component, and a test electrical module, thereby increasing the contamination space range of water body pollution factors at water quality monitoring points, increasing the feedback sensitivity of the physical and chemical characteristics test and analysis of water body pollution factors, and increasing the credibility of online water quality monitoring results. By setting a storage pipeline, a storage cavity, a discharge cover, a detection connection pipe, and a counterweight filter plate, the interaction frequency and interaction success rate between the pollution source and the analysis component at the analysis position are increased. By setting a rectifier cone cover, a buffer spring, a guide vane, and a flow detection channel, the feedback transmission noise of the physical and chemical characteristics test of the analysis component is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of water body analysis and testing, and in particular to a water quality monitoring device for a drainage system. Background Art

[0002] In modern industry, drainage systems are commonly found in various industrial systems. Water is a necessity in all aspects of industry and life in the natural environment. Pollution monitoring of drainage systems is not only a discharge requirement, but also a direct verification of various calibration analyses of industrial processes. The accuracy of water analysis and testing is directly related to the evaluation of industrial results. In addition, in a variety of natural environments, water quality monitoring and analysis is also the basis of scientific observation. In short, water quality analysis and monitoring play a vital role in all aspects.

[0003] With the development of science and technology, telecommunication technologies such as the Internet and the Internet of Things are used in various aspects. The application of the grain protection network in industrial production can further promote the improvement of science and technology. In the existing water body analysis and monitoring devices, water pollution can be monitored online conveniently and efficiently, and water body verification results can be responded to immediately, which is convenient for improving the efficiency and timeliness of industrial result evaluation. In the existing water quality analysis and monitoring methods, the physical and chemical properties of the monitoring and analysis factors contained in the pollution source are usually involved, such as physical properties such as temperature, turbidity and conductivity, pH value, dissolved oxygen, biochemical oxygen demand and chemical indicators such as heavy metals. It also involves other water body analysis and monitoring methods such as organic pollution detection and biological monitoring. The targets of these analysis and testing methods are the pollution factors carried by water pollution sources, so as to reflect the water pollution status as the basis for the evaluation of drainage system water quality. In the existing water quality analysis and testing equipment, the physical and chemical properties of the target factors of the analysis and testing are directly used for monitoring, which mostly requires manual participation, or the operation process is complicated and the operation requirements are high, which makes it difficult to meet the real-time analysis and testing needs of Internet online monitoring access.

[0004] In the prior art, for example, Korean invention patent KR1020240106244A discloses an automatic control device for water quality monitoring, which controls the mixed fluid carrying solids in the water flow at the analysis point of the drainage system, cooperates with the control of the flow velocity in the pipeline, affects the mixed water flow carrying solid impurities, and thus controls the flow velocity, flow rate, water pressure and blockage state of the mixed water flow; in this technical scheme, the mixed water flow is provided with flow damping by the filter plate and the intermediate pipe body. When the water flow operation is affected to a deeper level, the water pollution information reflected by the original parameters of the water flow may be destroyed. This technical scheme controls the more primary water parameters to achieve the purpose of automatic control of the water quality monitoring process, which may have an adverse effect on the accuracy of water quality monitoring analysis and the monitoring process. When the solid impurities in the mixed circulating water are less, the automatic control may fail.

[0005] For example, the U.S. invention patent US20210147255A1 discloses a swimming pool water monitoring device and method. In this invention patent, the fluid mechanics control method at the water outflow end is used to adjust the water flow flux, flow rate and pressure difference to monitor and analyze the water outflow from the pool. In this technical solution, the structure is relatively complicated, and the water flow control pressure may be high, resulting in damage to the water quality analysis test process. The water quality analysis monitoring results may suddenly jump with the change of the water flow control variable, which is not conducive to real-time monitoring, and the accuracy of the analysis and test results of the pool water may be poor. Summary of the invention

[0006] The purpose of the present invention is to provide a water quality monitoring device for a drainage system, so as to overcome the shortcomings of the prior art such as low credibility value of online monitoring feedback parameters of the physical and chemical characteristics of water pollution factors and difficulty in capturing analysis and testing points.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] A water quality monitoring device for a drainage system includes a detection connecting pipe, a flow detection channel is arranged in the detection connecting pipe, both ends of the flow detection channel are connected to the flow pipeline of the drainage system, the flow detection channel provides a water flow analysis test channel, and a test electrical module and an analysis component are arranged in the flow detection channel.

[0009] The analysis component monitors and analyzes the water flow in the flow detection channel. A weighted filter plate is provided in the flow detection channel. One end of the weighted filter plate is hinged in the side wall of the flow detection channel. The other movable end of the weighted filter plate is at the radially distal end of the flow path of the flow detection channel toward the analysis component. The weighted filter plate buffers the flow of water in the flow detection channel through the analysis component.

[0010] By setting up a flow detection channel, a weighted filter plate, an analysis component and a test electrical module, the flow path of the water quality monitoring water flow is improved, the flow velocity of the analysis test water body is reduced, the interaction process between the analysis component and the analysis test water flow is delayed, the response time of the water quality monitoring analysis is increased, and the probability of missed detection of water quality analysis pollution factors is reduced;

[0011] It increases the spatial range of contamination of water pollution factors at water quality monitoring points, increases the feedback sensitivity of the test and analysis of the physical and chemical properties of water pollution factors, increases the stability of water quality analysis and monitoring, reduces the frequency of fluctuations in the feedback results of water analysis tests, increases the credibility of online water quality monitoring results, and improves the networking adaptation conditions for online water quality analysis and monitoring.

[0012] Preferably, two analysis components are provided in the flow detection channel, and the two analysis components are respectively located on the inflow end and the outflow end path of the weighted filter plate;

[0013] It improves the probability of water quality monitoring failure, increases the clarity of water analysis and testing maintenance requirements, and improves the calibration performance of water pollution monitoring results.

[0014] Preferably, a storage pipe is provided in the side wall of the flow detection channel, a storage cavity is provided in the storage pipe, the inflow end of the storage cavity cooperates with the movable end of the counterweight filter plate, the flow detection channel accommodates solid impurities guided by the movable end of the counterweight filter plate, and a discharge cover is provided at the outflow end of the storage cavity.

[0015] Preferably, a discharge tail pipe is provided at the outflow end of the storage pipeline, a discharge cavity is provided in the discharge tail pipe, a guide arc profile is provided at the outflow end of the discharge cavity, the discharge cavity reduces the water flow pressure and increases the flow rate, and the discharge cover controls the opening and closing of the outflow end of the discharge cavity.

[0016] Preferably, a flow detection channel is provided with a rectifying cone cover, a buffer spring is fixedly connected between the rectifying cone cover and the side wall of the flow detection channel, a rectifying cavity is provided in the rectifying cone cover, a guide vane is provided in the side wall of the rectifying cavity, and the guide vane guides the water flow passing through the rectifying cavity;

[0017] By setting up storage pipes, storage chambers, discharge caps, detection connecting pipes and weighted filter plates, the interaction frequency and interaction success rate between the pollution source and the analysis component at the analysis position are increased, which can further reduce the probability of missed detection;

[0018] The interactive range of pollution factor analysis tests has been improved, further improving the accuracy of water quality analysis and monitoring.

[0019] Preferably, the analysis component is located at the outflow end of the rectifying cavity in the flow guiding direction;

[0020] By setting a rectifying cone cover, a buffer spring, a guide vane and a flow detection channel, the probability of occurrence of a laminar flow state in the water body under analysis and testing is reduced, the diffusion range of the pollutant factors in the water body at the monitoring point is further increased, the difficulty of analyzing and interacting the pollutant factors in the mixed phase of the water body under analysis and testing by the analysis component is reduced, and the accuracy of the feedback transmission results of the water body analysis and testing is further improved;

[0021] It reduces the idle running frequency of the feedback transmission of physical and chemical properties when analyzing and monitoring pollution factors, reduces the feedback transmission noise of the physical and chemical properties test of the analysis component, and improves the credibility of the monitoring data accessed online on the Internet.

[0022] Preferably, the side wall of the flow detection channel is slidably connected to a sliding seat via a spring in the direction of water flow, and a sliding filter plate is fixedly connected to the end of the sliding seat. The filtering surface of the sliding filter plate has an inclination in the radial direction of the flow path of the flow detection channel, and the inclination is smaller than the extreme value of the hinged deflection of the counterweight filter plate. A retraction spring is fixedly connected between the relative filtering surfaces of the sliding filter plate and the counterweight filter plate, and the sliding seat maintains the hinged posture of the counterweight filter plate to buffer the water flow.

[0023] Preferably, a displacement member is slidably connected between the relative filtering surfaces of the sliding filter plate and the weighted filter plate, and the displacement member is fixedly connected to the retraction spring through an elastic rope, and the displacement member maintains the distance between the sliding filter plate and the weighted filter plate;

[0024] By arranging a sliding filter plate, a sliding seat, a retracting spring, an elastic rope and a displacement member, the effective filtering retention effect of the relative filter surface between the sliding filter plate and the counterweight filter plate is improved, the probability of blockage of the analysis and testing system is reduced, and the stability and safety of water body analysis and testing work are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of a water quality monitoring device for a drainage system of the present invention;

[0027] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0028] Figure 3 is a schematic diagram of the internal structure of the exhaust tail pipe;

[0029] Figure 4 yes Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0030] Figure 5 It is a cross-sectional schematic diagram of the fairing cone.

[0031] Figure numbers: detection connecting pipe 10; flow detection channel 11; analysis component 12; packaging seat 13; counterweight filter plate 14; hinged seat 15; test electrical module 16; networking module 17; slide seat 18; sliding filter plate 19; retraction spring 20; elastic rope 21; displacement member 22; storage pipeline 30; storage chamber 31; discharge tail pipe 32; discharge duct sleeve 33; discharge through chamber 34; guide arc profile 35; discharge cover 36; fairing cone cover 40; buffer spring 41; fairing chamber 42; guide vane 43. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0033] The specific embodiments of the present invention described herein are only used to explain the purpose of the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as "arranged on" another element, it can be directly on another element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] Embodiment 1

[0036] Refer to the attached Figure 1 and attached Figure 2 As shown, the present invention provides a water quality monitoring device for a drainage system, including a detection connecting pipe 10, a flow detection channel 11 is arranged in the detection connecting pipe 10, both ends of the flow detection channel 11 are sealed and connected to the flow pipeline of the drainage system through flanges, the flow detection channel 11 adapts to the flow channel size specification of the drainage pipeline to provide a water flow analysis test channel, a packaging seat 13 is arranged in the side wall of the flow detection channel 11, the packaging seat 13 is sealed and installed with electrical components, a test electrical module 16 and an analysis component 12 are arranged in the flow detection channel 11, a networking module 17 and the test electrical module 16 are arranged in the packaging seat 13, the networking module 17 receives and sends the transmission data of the test electrical module 16, the analysis component 12 is circuit-connected to the test electrical module 16, the analysis component 12 can be equipped with analysis test conditions and feedback response elements according to the physical and chemical characteristics of the targeted water pollution factors, and the test electrical module 16 transmits and processes the feedback parameters of the analysis component 12 to monitor the physical and chemical characteristics of the water body;

[0037] The radial height of the analysis component 12 in the flow path of the flow detection channel 11 is adjustable, and the height position adjustment structure and the position height automatic adjustment driving component of the analysis component 12 can be set according to the actual working conditions. The analysis component 12 monitors and analyzes the water flow in the flow detection channel 11, and the liquid level of the analysis component 12 is adjusted according to the water flow rate in the flow detection channel 11. A hinge seat 15 is fixedly connected in the side wall of the flow detection channel 11, and a weighted filter plate 14 is provided in the flow detection channel 11. One end of the weighted filter plate 14 is hinged in the side wall of the flow detection channel 11 through the hinge seat 15, and the other movable end of the weighted filter plate 14 is at the radial far end of the flow path of the flow detection channel 11 toward the analysis component 12. The weighted filter plate 14 buffers the flow of water in the flow space of the flow detection channel 11 through the analysis component 12.

[0038] The weighted filter plate 14 not only filters the water flowing in the flow detection channel 11, but also has a certain blocking effect, so that the interaction time of the water flowing through the analysis component 12 in the flow detection channel 11 is less than the interaction time of the water flowing directly through the analysis component 12 without damping. The interaction point where the analysis component 12 in the flow detection channel 11 is located for analyzing and testing the water body is decelerated before the analysis water body flows in, which can prevent the pollution source of the water body with a high flow rate from being quickly pushed away from the monitoring point with the water body; the flow path of the water quality monitoring water flow is improved, the flow speed of the analysis test water body is reduced, the interaction process of the analysis component 12 analyzing and testing the water flow is delayed, the response time of the water quality monitoring analysis is increased, and the probability of missed detection of the pollution factor in the water quality analysis is reduced;

[0039] In addition, after the weighted filter plate 14 is installed, the edge of the active end of the weighted filter plate 14 can form turbulence in the analysis test water flowing through the analysis component 12 in the flow detection channel 11, thereby increasing the flow divergence range of the flowing water before it flows through the analysis component 12, and having a certain laminar flow destruction effect; improving the spatial range of contamination of water pollution factors at water quality monitoring points, improving the feedback sensitivity of the test and analysis of the physical and chemical properties of water pollution factors, improving the stability of water quality analysis and monitoring, reducing the frequency of fluctuations in the feedback results of water analysis tests, improving the credibility of online water quality monitoring results, and improving the networking adaptation conditions for online water quality analysis and monitoring.

[0040] Two identical analysis components 12 are provided in the flow detection channel 11, and the two analysis components 12 are respectively located on the inflow and outflow paths of the weighted filter plate 14; the setting of the two online monitoring points of the two analysis components 12 on both sides of the outflow and inflow ends of the weighted filter plate 14 can cope with the water quality monitoring of the forward and reverse flows of the detection connecting pipe 10 connected to various drainage system pipes, and at the same time, the monitoring results on both sides of the weighted filter plate 14 can be compared and verified with each other, and the concentration difference of water pollution factors in the contaminated water at the monitoring points on both sides of the weighted filter plate 14 can be judged, and to a certain extent, it can be judged whether the carrier of water pollution factors is water flow or solid impurities; the probability of water quality monitoring failure is improved, the clarity of water analysis test maintenance requirements is improved, the feedback of physical and chemical properties of water pollution factors is further improved, and the calibration performance of water pollution monitoring results is improved.

[0041] Refer to the attached Figure 1 and attached Figure 3 As shown, a storage pipe 30 is provided in the side wall of the flow detection channel 11, and a storage cavity 31 is provided in the storage pipe 30. The inflow end of the storage cavity 31 cooperates with the movable end of the weighted filter plate 14, and the flow detection channel 11 accommodates the solid impurities guided by the movable end of the weighted filter plate 14. A discharge cover 36 is provided at the outflow end of the storage cavity 31;

[0042] The inflow end opening of the storage chamber 31 and the movable end of the weighted filter plate 14 in a hanging posture are matched with each other in the flow path in the flow detection channel 11, and the storage chamber 31 receives the solid impurities and partially flowing water blocked by the weighted filter plate 14 in the analysis and test water flow in the flow detection channel 11;

[0043] When the water flow velocity is relatively low and the flow volume is relatively small, the weighted filter plate 14 maintains a vertical posture under the action of its own weight. At this time, the flowing water entering the weighted filter plate 14 from the left side of the weighted filter plate 14 flows out to the right end of the flow detection channel 11 under the filtering and blocking action of the weighted filter plate 14, and part of the solid impurities filtered by the weighted filter plate 14 enter the storage chamber 31 and are retained under the disturbance and sedimentation of the water flow; when the weighted filter plate 14 swings around the hinged position at the hinged seat 15, the movable end of the weighted filter plate 14 expands the communication space range between the storage chamber 31 and the right end of the flow detection channel 11;

[0044] After the analysis component 12 detects the feedback indication of the targeted pollution factor, the storage chamber 31 contains the retained solid impurities and part of the water. According to actual needs, the discharge cap 36 at the outflow end of the storage pipe 30 can be opened to release part of the water and solid impurities retained in the storage chamber 31, so as to facilitate the collection of the carrier of the water pollution factor;

[0045] In addition, the storage cavity 31 accommodates a retention trap that retains some impurities and water mixture phases. The storage cavity 31 retains water mixture materials carrying targeted factors, creates an immersion environment for the pollution source and moves it to the analysis point, increases the interaction frequency and interaction success rate of the pollution source with the analysis component at the analysis position, and can further reduce the probability of missed detection; at the same time, the water pollution factors retained in the storage cavity 31 can immerse the water body within the connection range between the storage cavity 31 and the flow detection channel 11, thereby increasing the retention time of the pollution factors at the analysis and testing points, which can further increase the response time of water quality monitoring analysis, increase the interaction range of pollution factor analysis and testing, and further improve the accuracy of water quality analysis and monitoring.

[0046] A discharge tail pipe 32 is provided at the outflow end of the storage pipe 30, a discharge conduit sleeve 33 is provided in the discharge tail pipe 32, a discharge through cavity 34 is provided in the discharge conduit sleeve 33, the flow path of the discharge through cavity 34 decreases in diameter in the outflow direction, a guide arc profile 35 is provided at the outflow end of the discharge through cavity 34, the discharge through cavity 34 reduces the water flow pressure and increases the flow rate, and a discharge cover 36 controls the opening and closing of the outflow end of the discharge through cavity 34;

[0047] According to the relevant characteristics of fluid mechanics, the discharge cavity 34 rectifies the water mixture phase retained in the storage cavity 31. After opening the discharge cover 36, the discharge tail pipe 32 and the discharge cover 36 do not interfere with the flow. The discharge trajectory of the water mixture phase flows under the guidance of the guide arc profile 35. The mass inertia of solid impurities in the water is relatively large compared to the water body, and it is relatively easy to break through the water flow surface adsorption. The guide arc profile 35 can perform a certain degree of solid-liquid separation on the water body and solid impurity mixed phase fluid, which can improve the convenience of retaining and collecting water pollution sources and water quality analysis and testing.

[0048] See attached Figure 1 , Attachment Figure 4 And attached Figure 5 As shown, a flow detection channel 11 is provided with a rectifying cone cover 40, a buffer spring 41 is fixedly connected between the rectifying cone cover 40 and the side wall of the flow detection channel 11, a rectifying cavity 42 is provided in the rectifying cone cover 40, a guide vane 43 is provided in the side wall of the rectifying cavity 42, and the guide vane 43 guides the water flowing through the rectifying cavity 42; the analysis component 12 is located at the outflow end of the rectifying cavity 42 in the diversion direction;

[0049] When the flow rate of the test water flowing into the flow detection channel 11 is large, the rectifying cavity 42 and the guide vanes 43 can rectify and guide the flowing water flow, and the guide vanes 43 have a certain impact separation and crushing effect on the solid impurities condensed into agglomerates during the guiding and rectifying process;

[0050] The flow range and flow path of the mixed phase fluid of the analysis test flow direction analysis component 12 are increased, the probability of the occurrence of the laminar flow state of the water body in the analysis test is reduced, the diffusion range of the pollution factors in the water body at the monitoring point is further increased, the difficulty of the analysis interaction of the pollution factors in the mixed phase of the water body in the analysis test of the analysis component 12 is reduced, and the accuracy of the feedback transmission results of the water body analysis test is further improved;

[0051] With the cooperation of the buffer spring 41, the rectifier cone cover 40 can buffer the kinetic energy of water and reduce the circulation impact, thereby improving the stability and safety of the analysis and monitoring components, reducing the idle running frequency of the feedback transmission of the physical and chemical properties when analyzing and monitoring pollution factors, reducing the feedback transmission noise of the physical and chemical properties test of the analysis component, and improving the credibility of the monitoring data accessed online on the Internet.

[0052] See attached Figure 1 and attached Figure 2 As shown, the side wall of the flow detection channel 11 is slidably connected with a slide seat 18 via a spring in the water flow direction, and a sliding filter plate 19 is fixedly connected to the end of the slide seat 18. The filtering surface of the sliding filter plate 19 has an inclination in the radial direction of the flow path of the flow detection channel 11, and the inclination is smaller than the hinged deflection extreme value of the counterweight filter plate 14. A retraction spring 20 is fixedly connected between the sliding filter plate 19 and the relative filtering surface of the counterweight filter plate 14. The sliding filter plate 19 is located between the analysis component 12 and the counterweight filter plate 14. The slide seat 18 maintains the hinged posture of the counterweight filter plate 14 to buffer the water flow through the retraction spring 20;

[0053] A displacement member 22 is slidably connected between the relative filtering surfaces of the sliding filter plate 19 and the weighted filter plate 14. The displacement member 22 is fixedly connected to a retraction spring 20 through an elastic rope 21. The retraction spring 20 maintains the distance between the sliding filter plate 19 and the weighted filter plate 14 to form an effective filtering space. The retraction spring 20 cleans the filtering surface when the sliding filter plate 19 and the weighted filter plate 14 move relative to each other.

[0054] During the change of water flow velocity, driven by the damping reaction force of the weighted filter plate 14 on the water flow, the weighted filter plate 14 follows the change of the kinetic energy of the water flow and swings around the hinge seat 15 in the flow detection channel 11. At the same time, the weighted filter plate 14 drives the sliding filter plate 19 to follow the movement through the retraction spring 20. During the relative movement of the sliding filter plate 19 and the weighted filter plate 14, the displacement member 22 slides relatively under the connection of the elastic rope 21 and the retraction spring 20, and performs sliding scraping on the weighted filter plate 14 and the sliding filter plate 19. In addition, under the elastic sliding connection between the side wall of the flow detection channel 11 and the sliding seat 18, the sliding filter plate 19 always generates a certain pulling force on the weighted filter plate 14 through the retraction spring 20.

[0055] It can break the swinging posture of the weighted filter plate 14, maintain the tendency of the weighted filter plate 14 to maintain a vertical posture under the action of its own counterweight, reduce the probability of the weighted filter plate 14 being limited and stuck, increase the damping effect on the water flow, improve the effective filtering retention effect of the relative filter surface between the sliding filter plate 19 and the weighted filter plate 14, reduce the probability of blockage in the analysis and testing system, and improve the stability and safety of water body analysis and testing work.

[0056] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes made by a person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A water quality monitoring device for a drainage system, comprising a detection connecting pipe (10), wherein a flow detection channel (11) is provided in the detection connecting pipe (10), wherein a test electrical module (16) and an analysis component (12) are provided in the flow detection channel (11), wherein: The analysis component (12) monitors and analyzes the water flow flowing in the flow detection channel (11); a weighted filter plate (14) is provided in the flow detection channel (11); one end of the weighted filter plate (14) is hinged in the side wall of the flow detection channel (11); the other movable end of the weighted filter plate (14) is located at the radially distal end of the flow path of the flow detection channel (11) toward the analysis component (12); the weighted filter plate (14) buffers the flow of water in the flow space of the flow detection channel (11) passing through the analysis component (12); The side wall of the flow detection channel (11) is slidably connected to a slide seat (18) via a spring in the direction of water flow, and a sliding filter plate (19) is fixedly connected to the end of the slide seat (18). The filtering surface of the sliding filter plate (19) has an inclination in the radial direction of the flow path of the flow detection channel (11), and the inclination is smaller than the hinged deflection extreme value of the counterweight filter plate (14). A retraction spring (20) is fixedly connected between the sliding filter plate (19) and the relative filtering surface of the counterweight filter plate (14), and the slide seat (18) maintains the hinged posture of the counterweight filter plate (14) to buffer the water flow.

2. A water quality monitoring device for a drainage system as claimed in claim 1, characterized in that: Two analysis components (12) are arranged in the flow detection channel (11), and the two analysis components (12) are respectively located on the inflow end and the outflow end path of the weighted filter plate (14).

3. A water quality monitoring device for a drainage system as claimed in any one of claims 1 to 2, characterized in that: A storage pipe (30) is provided in the side wall of the flow detection channel (11), and a storage chamber (31) is provided in the storage pipe (30). The inflow end of the storage chamber (31) cooperates with the movable end of the counterweight filter plate (14), and the flow detection channel (11) accommodates solid impurities guided by the movable end of the counterweight filter plate (14). The outflow end of the storage chamber (31) is provided with a discharge cover (36).

4. A water quality monitoring device for a drainage system as claimed in claim 3, characterized in that: The outflow end of the storage pipe (30) is provided with a discharge tail pipe (32), a discharge cavity (34) is provided in the discharge tail pipe (32), a guide arc profile (35) is provided at the outflow end of the discharge cavity (34), the discharge cavity (34) reduces water flow pressure and increases flow rate, and the discharge cover (36) controls the opening and closing of the outflow end of the discharge cavity (34).

5. A water quality monitoring device for a drainage system as claimed in any one of claims 1 to 2, characterized in that: A flow detection conical cover (40) is provided in the flow detection channel (11), a buffer spring (41) is fixedly connected between the flow detection conical cover (40) and a side wall of the flow detection channel (11), a flow rectification cavity (42) is provided in the flow rectification conical cover (40), a guide vane (43) is provided in the side wall of the flow rectification cavity (42), and the guide vane (43) guides the water flow flowing through the flow rectification cavity (42).

6. A water quality monitoring device for a drainage system as claimed in claim 5, characterized in that: The analysis component (12) is located at the outflow end of the rectifying cavity (42) in the flow guiding direction.

7. A water quality monitoring device for a drainage system as claimed in claim 1, characterized in that: A displacement member (22) is slidably connected between the relative filtering surfaces of the sliding filter plate (19) and the counterweight filter plate (14); the displacement member (22) is fixedly connected to the retraction spring (20) via an elastic rope (21); and the displacement member (22) maintains the distance between the sliding filter plate (19) and the counterweight filter plate (14).

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