Water quality on-line monitoring system for secondary water supply

Abstract

The utility model discloses a water quality on-line monitoring system for secondary water supply, which relates to the technical field of water quality on-line monitoring and comprises a water delivery pipe, one side of the water delivery pipe is connected with an input end of a sampling pool through a sampling pipe, and an output end of the sampling pool is connected with the water delivery pipe through a collecting pipe. The monitoring module is arranged in the sampling pool and used for monitoring the water quality, the water quality of secondary water supply is monitored through multiple sets of sensors, when the monitoring control platform detects that the numerical value of the sensors drifts, the pressurizing water pump is started, and water is pressurized through the pressurizing water pump and then sprayed out through the cleaning spray head; the cleaning nozzles are symmetrically arranged around the sensor, so that the surface of the sensor can be fully cleaned, the phenomena of data drift and great errors caused by blockage of an optical window or an electrode of the sensor by a biological membrane are avoided, the operation burden of workers is relieved, time and labor are saved, and great convenience is provided for stable work of a water quality monitoring system.

Description

Technical Field

[0001] This utility model relates to the field of online water quality monitoring technology, specifically to an online water quality monitoring system for secondary water supply. Background Technology

[0002] Secondary water supply refers to the process by which units or individuals store and pressurize urban public water supply or self-built water supply facilities, and then supply it to users or for their own use through pipelines. Compared with raw water supply, the water quality of secondary water supply is more easily polluted, so it is necessary to monitor its water quality when carrying out secondary water supply.

[0003] Existing secondary water supply water quality monitoring systems are equipped with multiple water quality sensors for monitoring. During long-term use, nutrients in the water accumulate, promoting the growth of biofilms (such as algae and bacteria) on the sensor surface, clogging optical windows or electrodes, causing data drift and resulting in significant errors. The traditional approach is to manually clean the sensor surface, but this method is time-consuming and labor-intensive, causing many inconveniences to the stable operation of the water quality monitoring system. Utility Model Content

[0004] The purpose of this invention is to provide an online monitoring system for secondary water supply water quality to solve the technical problems mentioned in the background section.

[0005] The technical problem to be solved by this utility model can be achieved through the following technical solution:

[0006] A secondary water supply water quality online monitoring system includes a water supply pipe, one side of which is connected to the input end of a sampling pool via a sampling pipe, and the output end of the sampling pool is connected to the water supply pipe via a manifold.

[0007] A monitoring module installed inside the sampling pool for monitoring water quality; a rinsing module installed inside the sampling pool for cleaning the monitoring module; and a support assembly installed inside the sampling pool for installing the monitoring module.

[0008] The support assembly includes a horizontal axis horizontally disposed at the top of the sampling pool, a mounting plate disposed on the horizontal axis, a lifting seat movably disposed on the mounting plate, and a fixing plate connected to the bottom of the lifting seat.

[0009] As a further embodiment of this utility model: solenoid valves are provided on the water supply pipe, sampling pipe and manifold, and the end face of the mounting plate is parallel to the water flow direction in the sampling pool.

[0010] As a further embodiment of this utility model, the monitoring module includes: a residual chlorine sensor, a pH sensor, a turbidity sensor, a dissolved oxygen sensor, and a conductivity sensor.

[0011] As a further embodiment of this invention: the residual chlorine sensor, pH sensor, turbidity sensor, dissolved oxygen sensor and conductivity sensor are all mounted on the side wall of the fixed plate.

[0012] As a further embodiment of this utility model: the rinsing module includes a pressurized water pump installed inside the sampling pool and a cleaning nozzle installed on a fixed plate for rinsing the residual chlorine sensor, pH sensor, turbidity sensor, dissolved oxygen sensor and conductivity sensor. The cleaning nozzle is connected to the water pump via a hose.

[0013] As a further aspect of this invention, it also includes a data acquisition module, which is electrically connected to the monitoring module and is used to convert the sensor analog signals into digital signals.

[0014] As a further embodiment of this utility model: the data acquisition module is equipped with a wireless transmission module, which can upload water quality monitoring data and equipment operation data to the monitoring and control platform in real time.

[0015] As a further embodiment of this utility model: the monitoring and control platform includes an alarm system and a storage module. The alarm system is preset with various water quality thresholds. When the thresholds are exceeded, it issues an audible and visual alarm and closes the magnetic valve on the water supply pipe. The storage module is used to store historical data and supports querying and comparison.

[0016] As a further embodiment of this utility model: the end face of the mounting plate is provided with a lifting slide groove, the side of the lifting slide groove is provided with a number of slots at intervals, the lifting seat is provided with a limiting slider that matches the lifting slide groove, the limiting slider is provided with a first slot on the side near the slot, and a positioning block that can engage with the slot is movably provided inside the first slot.

[0017] As a further embodiment of this utility model: the lifting seat has a second groove symmetrically opened inside both ends, which communicates with the first groove; the top of both ends of the lifting seat has a movable groove symmetrically opened, which communicates with the second groove; a connecting rod connected to the positioning block is slidably arranged inside the second groove; a return spring for supporting the connecting rod is arranged inside the second groove; and a toggle plate connected to the connecting rod is slidably arranged inside the movable groove.

[0018] The beneficial effects of this utility model are:

[0019] 1. In this utility model, multiple sets of sensors are used to monitor the water quality of the secondary water supply. When the monitoring and control platform detects that the sensor values ​​are drifting, the pressurized water pump is started. The pressurized water pump pressurizes the water and sprays it out through the cleaning nozzles. The cleaning nozzles are symmetrically arranged around the sensors, which can thoroughly clean the sensor surface and avoid biofilm clogging the sensor optical window or electrodes, which would cause data drift and large errors. This reduces the operating burden of the staff, saves time and effort, and provides great convenience for the stable operation of the water quality monitoring system.

[0020] 2. In this utility model, by pressing the toggle plate, the connecting rod squeezes the return spring, and the return spring is compressed. At this time, the connecting rod drives the positioning block to retract into the second slot, thereby disengaging the positioning block from the slot. The operator can then easily adjust the water depth of the sensor, avoiding excessive water pressure from squeezing the sensor shell or sensitive membrane, which could deform the measuring elements (such as electrochemical electrodes and optical windows) and affect signal stability. It also avoids placing the sensor in deep, low-flow areas, slowing down the growth rate of biofilm on the sensor surface, minimizing the risk of biofilm clogging the optical window or electrodes, and ensuring the stable operation of the sensor. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the monitoring system structure in this utility model;

[0023] Figure 2 This is a schematic diagram of the support assembly structure in this utility model;

[0024] Figure 3 This is a schematic diagram of the limiting slider structure in this utility model;

[0025] Figure 4 This is a schematic diagram of the reset spring structure in this utility model.

[0026] In the diagram: 1. Horizontal axis; 2. Erection plate; 3. Lifting slide; 4. Slot; 5. Lifting seat; 6. Fixed plate; 7. Limiting slider; 8. Slot No. 1; 9. Positioning block; 10. Slot No. 2; 11. Movable slot; 12. Connecting rod; 13. Return spring; 14. Actuating plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figure 1-4 As shown, a secondary water supply water quality online monitoring system includes a water supply pipe, one side of which is connected to the input end of a sampling pool via a sampling pipe, and the output end of the sampling pool is connected to the water supply pipe via a manifold.

[0029] A monitoring module installed inside the sampling pool for monitoring water quality; a rinsing module installed inside the sampling pool for cleaning the monitoring module; and a support assembly installed inside the sampling pool for installing the monitoring module.

[0030] The support assembly includes a horizontal axis 1 positioned at the top of the sampling pool, a mounting plate 2 mounted on the horizontal axis 1, a lifting seat 5 movably mounted on the mounting plate 2, and a fixed plate 6 connected to the bottom of the lifting seat 5. The monitoring module includes a residual chlorine sensor, a pH sensor, a turbidity sensor, a dissolved oxygen sensor, and a conductivity sensor. These sensors are all mounted on the side wall of the fixed plate 6. One side of the water supply pipe connects to the sampling pool via an inlet pipe to capture the water flow to be measured. The output end of the sampling pool returns to the water supply pipe via a drain pipe, forming a closed-loop sampling channel. The sampling pool is made of corrosion-resistant stainless steel and has internal guide plates to ensure uniform water flow through the monitoring area. Operators can lift the lifting seat 5 to individually change the water depth of a specific sensor. Residual chlorine sensor: Electrochemical method (electrode model: CL-100), residual chlorine concentration detection range 0~5mg / L, accuracy ±0.1mg / L; pH sensor: Glass electrode type (model: pH-200), range 0~14pH, automatic temperature compensation (-10℃~60℃); Turbidity sensor: Based on 90° light scattering principle (model: TURB-500), range 0~1000NTU, resolution 0.1NTU; Dissolved oxygen sensor: Fluorescence method (model: DO-800), range 0~20mg / L, membrane-free design to avoid polarization interference; Conductivity sensor: Four-electrode type (model: EC-300), range 0~2000μS / cm, supports salinity conversion. After detecting various values ​​of the water body, the sensors transmit the signals to the data acquisition module.

[0031] In this embodiment, specifically, solenoid valves are installed on the water supply pipe, sampling pipe, and manifold. The solenoid valve model is DN50-ZF, which is used to remotely control the water flow. The end face of the mounting plate 2 is parallel to the water flow direction in the sampling pool to avoid obstructing the water flow.

[0032] In this embodiment, the rinsing module specifically includes a pressurized water pump installed inside the sampling pool and cleaning nozzles installed on the fixed plate 6 for rinsing the residual chlorine sensor, pH sensor, turbidity sensor, dissolved oxygen sensor, and conductivity sensor. The cleaning nozzles are connected to the water pump via hoses, and the pressurized water pump is electrically connected to the monitoring and control platform. The monitoring and control platform is equipped with a pressurized water pump controller. When the monitoring and control platform detects a drift in the sensor values, the controller starts the pressurized water pump, pressurizes the water, and sprays it out through the cleaning nozzles. The cleaning nozzles are made of 316L stainless steel, and the rinsing time is 30 seconds. They are symmetrically arranged around the sensors, thereby ensuring thorough cleaning of the sensor surfaces.

[0033] In this embodiment, specifically, a data acquisition module is also included. The data acquisition module is electrically connected to the monitoring module and is used to convert the sensor analog signals into digital signals. The data acquisition module is equipped with a wireless transmission module. The data acquisition module adopts an industrial-grade PLC (model: S7-1200) to convert the sensor analog signals into digital signals, supports the Modbus RTU protocol, has a sampling frequency of 1 time / minute, and a data cache capacity of 8GB. The wireless transmission module can upload water quality monitoring data and equipment operation data to the monitoring and control platform in real time. The wireless transmission module has built-in dual-mode communication (4G+LoRa) and uses NB-IoT low-power mode by default to upload data to the monitoring and control platform. When the network is disconnected, it automatically switches to the local storage unit (SD card) and synchronously retransmits the data after the network is restored.

[0034] In this embodiment, the monitoring and control platform specifically includes an alarm system and a storage module. The alarm system has preset thresholds for various water quality parameters. When these thresholds are exceeded, it issues an audible and visual alarm and closes the magnetic valve on the water supply pipe. The storage module is used to store historical data and supports querying and comparison.

[0035] In this embodiment, specifically, the end face of the support plate 2 is provided with a lifting slide groove 3, and several sets of slots 4 are provided at intervals on the side of the lifting slide groove 3. The lifting seat 5 is provided with a limiting slider 7 that matches the lifting slide groove 3. A first slot 8 is provided on the side of the limiting slider 7 near the slot 4. A positioning block 9 that can engage with the slot 4 is movably arranged inside the first slot 8. A second slot 10 that communicates with the first slot 8 is symmetrically opened inside both ends of the lifting seat 5. A movable slot 11 that communicates with the second slot 10 is symmetrically opened at the top of both ends of the lifting seat 5. A slot 9 that is slidably connected to the positioning block 9 is slidably arranged inside the second slot 10. The connecting rod 12 and the second slot 10 are equipped with a return spring 13 to support the connecting rod 12. The movable slot 11 is slidably equipped with a toggle plate 14 connected to the connecting rod 12. When the position of the sensor needs to be adjusted, the operator can press the toggle plate 14 inward. The toggle plate 14 squeezes the return spring 13 through the connecting rod 12. The return spring 13 is compressed. At this time, the connecting rod 12 drives the positioning block 9 to retract into the second slot 10. Thus, the positioning block 9 is disengaged from the slot 4, and the operator can easily adjust the water depth of the sensor. After the adjustment is completed, the operator can release the pressure.

[0036] The online water quality monitoring system is also equipped with a power supply module to ensure the normal operation of the system.

[0037] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An on-line monitoring system for water quality for secondary water supply, characterized by: The water delivery pipe is connected with the input end of the sampling tank through a sampling pipe, and the output end of the sampling tank is connected with the water delivery pipe through a converging pipe; A monitoring module for monitoring water quality is arranged in the sampling tank, a flushing module for cleaning the monitoring module is arranged in the sampling tank, and a support assembly for mounting the monitoring module is arranged in the sampling tank; The support assembly comprises a horizontal shaft (1) arranged horizontally at the top of the sampling tank, a mounting plate (2) arranged on the horizontal shaft (1), a lifting seat (5) movably arranged on the mounting plate (2), and a fixing plate (6) connected to the bottom of the lifting seat (5).

2. The water quality on-line monitoring system for secondary water supply according to claim 1, characterized in that, The mounting plate (2) is parallel to the water flow direction in the sampling tank.

3. The water quality on-line monitoring system for secondary water supply according to claim 1, characterized in that, The monitoring module comprises a residual chlorine sensor, a pH sensor, a turbidity sensor, a dissolved oxygen sensor, and an electric conductivity sensor.

4. The water quality on-line monitoring system for secondary water supply according to claim 3, characterized in that, The residual chlorine sensor, the pH sensor, the turbidity sensor, the dissolved oxygen sensor, and the electric conductivity sensor are all mounted on the side wall of the fixing plate (6).

5. The water quality on-line monitoring system for secondary water supply according to claim 4, characterized in that, The flushing module comprises a pressurized water pump arranged in the sampling tank and a cleaning nozzle arranged on the fixing plate (6) for flushing the residual chlorine sensor, the pH sensor, the turbidity sensor, the dissolved oxygen sensor, and the electric conductivity sensor, wherein the cleaning nozzle is connected with the water pump through a hose.

6. The water quality on-line monitoring system for secondary water supply according to claim 1, characterized in that, A data acquisition module is further arranged, which is electrically connected with the monitoring module and is used for converting the sensor analog signal into a digital signal.

7. The water quality on-line monitoring system for secondary water supply according to claim 6, characterized in that, A wireless transmission module is arranged on the data acquisition module, which can upload the water quality monitoring data and the equipment operation data to a monitoring control platform in real time.

8. The water quality on-line monitoring system for secondary water supply according to claim 7, characterized in that, The monitoring control platform comprises an alarm system and a storage module, the alarm system is pre-set with various water quality threshold values, and when the threshold values are exceeded, an audible and visual alarm is sounded and the magnetic control valve on the water delivery pipe is closed, the storage module is used for storing historical data and supporting query and comparison.

9. The water quality on-line monitoring system for secondary water supply according to claim 1, characterized in that, The end surface of the mounting plate (2) is provided with a lifting sliding groove (3), a plurality of groups of clamping grooves (4) are arranged at intervals on the side edge of the lifting sliding groove (3), a limiting sliding block (7) matched with the lifting sliding groove (3) is arranged on the lifting seat (5), a first slot (8) is arranged on the side of the limiting sliding block (7) close to the clamping groove (4), and a positioning block (9) capable of being clamped with the clamping groove (4) is movably arranged in the first slot (8).

10. The water quality on-line monitoring system for secondary water supply according to claim 9, characterized in that, A second slot (10) communicated with the first slot (8) is symmetrically arranged in the two ends of the lifting seat (5), an active slot (11) communicated with the second slot (10) is symmetrically arranged on the top of the two ends of the lifting seat (5), a connecting rod (12) connected with the positioning block (9) is slidably arranged in the second slot (10), a return spring (13) for supporting the connecting rod (12) is arranged in the second slot (10), and a push plate (14) connected with the connecting rod (12) is slidably arranged in the active slot (11).

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