Remote quality control system and use method for water quality multi-parameter monitoring instrument

Abstract

The present invention provides a remote quality control system suitable for a water quality multi-parameter monitor and a use method thereof, comprising a water quality multi-parameter monitor, a quality control cup, a multi-way valve, a peristaltic pump, a syringe pump, a control module, an industrial computer, an air filter, a pure water bottle and a plurality of mother liquid bottles; the pure water bottle, the plurality of mother liquid bottles and the air filter are respectively connected to the multi-way valve, the multi-way valve is connected to the quality control cup through a switchable peristaltic pump passage and a syringe pump passage, a monitoring pipeline of the water quality multi-parameter monitor is connected to the quality control cup, a liquid level monitoring and overflow device is arranged in the quality control cup, a second interface at the end of the multi-way valve is connected to the pure water bottle, the industrial computer communicates with the control module, and a quality control system with more complex components can not only provide configuration of quality control liquids of multiple parameters, but also provide reminders of the amount of the solution, use a set of systems, be compatible with different quality control requirements, and be modularly designed for easy expansion.

Description

Technical Field

[0001] The present invention relates to the field of water quality monitoring, and in particular to a remote quality control system and a use method suitable for a water quality multi-parameter monitor. Background Art

[0002] During the operation of the water quality multi-parameter monitor, in order to achieve long-term effectiveness and reliability of the measurement data, regular calibration and quality control are necessary.

[0003] There are usually two existing calibration and quality control methods: one is that the inspectors bring standard solutions or equipment to the site for manual calibration or quality control, which undoubtedly brings huge workload and labor costs, and cannot guarantee the long-term reliable operation of the monitor. The other method is remote quality control or online quality control. However, the existing quality control instruments can usually only perform quality control on one type of monitoring equipment. If you want to achieve quality control of multiple parameters, you need to equip multiple devices, which will undoubtedly greatly increase the construction cost and prevent it from being widely promoted.

[0004] In addition, the existing remote quality control or online quality control can usually only be configured with two solutions, while the existing water quality monitoring equipment mostly has multiple parameter measurement functions. In this case, the existing remote quality control instrument or online quality control instrument cannot meet the quality control or calibration requirements of the water quality multi-parameter monitor. In other words, the first disadvantage of the existing quality control instrument is that the configuration solution types are limited and cannot meet the needs of the water quality multi-parameter monitor.

[0005] The second disadvantage of the existing quality control instrument is that it uses equipment including a controller, a three-way solenoid valve, a peristaltic pump, a spike tank, an air pump, a straight-through solenoid valve, an aeration tube, a liquid level sensor, a waste liquid container, a liquid preparation cup, a syringe, a syringe holder, a stepper motor and a screw slider, a pure water container, a mother liquid bottle, a camera, an air filter, a gas-controlled solenoid valve, a refrigeration system, and other equipment to complete the configuration of a quality control liquid or a spiked liquid. The system is too complicated, the cost is relatively high, and it is inconvenient to maintain.

[0006] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0007] The purpose of the present invention is to address the deficiencies in the prior art and to provide a remote quality control system for a water quality multi-parameter monitor that is compatible with multiple water quality parameter monitoring requirements, has reduced system complexity, uses fewer components, is modular and easy to expand, has monitorable usage, and has reduced costs, as well as a method of using the system.

[0008] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a remote quality control system suitable for a water quality multi-parameter monitor, comprising a water quality multi-parameter monitor, a quality control cup, a multi-way valve, a peristaltic pump, a syringe pump, a control module, an industrial computer, an air filter, a pure water bottle and a plurality of mother liquid bottles;

[0009] Liquid level sensors are respectively arranged in the pure water bottle and the plurality of mother liquid bottles, and each liquid level sensor is connected to a control module for liquid level monitoring;

[0010] The pure water bottle, the air filter and the plurality of mother liquid bottles are respectively connected to different interfaces of the multi-way valve, and the multi-way valve is controlled by a control module to construct different valve paths and combine different solutions;

[0011] The front end interface of the multi-way valve is connected to the quality control cup through a switchable peristaltic pump passage and a syringe pump passage, and the peristaltic pump and the syringe pump are both controlled by a control module and are used to configure different target solutions;

[0012] The monitoring pipeline of the water quality multi-parameter monitor is connected to the quality control cup, and the water quality multi-parameter monitor communicates with the industrial computer to detect water quality parameters and upload them;

[0013] A liquid level monitoring and overflow device is arranged in the quality control cup, the overflow outlet of the liquid level monitoring and overflow device is connected to the waste liquid pool, a waste liquid level sensor is installed in the waste liquid pool, and the liquid level monitoring and overflow device and the waste liquid level sensor are controlled by the control module to monitor the liquid levels of the quality control cup and the waste liquid pool;

[0014] The first interface at the end of the multi-way valve is connected to a wastewater tank for storing back-pumped water. A wastewater level sensor is installed in the wastewater tank. The wastewater level sensor is connected to a control module for monitoring the liquid level in the wastewater tank.

[0015] The second interface at the end of the multi-way valve is connected to a pure water bottle, and cooperates with the peristaltic pump to clean the valve path and pipeline;

[0016] The industrial computer communicates with the control module and is used to configure parameters of the control module.

[0017] Based on the above, the front end interface of the multi-way valve is connected to the first interface of the first three-way valve, the second interface and the third interface of the first three-way valve are respectively connected to the inlets of the peristaltic pump and the injection pump, the outlets of the peristaltic pump and the injection pump are respectively connected to the first interface and the second interface of the second three-way valve, the third interface of the second three-way valve is connected to the first interface of the third three-way valve, and the second interface of the third three-way valve is connected to the quality control cup, and the three three-way valves are all controlled by the control module to control the travel path of the fluid and the on-and-off of the path.

[0018] Based on the above, the pure water bottle and multiple mother liquid bottles are stored in a refrigerator.

[0019] A method for using the remote quality control system for a water quality multi-parameter monitor as described above comprises the following steps:

[0020] S1. Calculate the required amount of mother solution according to the concentration of mother solution in the selected mother solution bottle, the volume of the quality control cup and the concentration of the quality control solution to be configured;

[0021] S2. The control module controls the multi-way valve to connect the interface of the selected mother liquid bottle, the front end interface of the multi-way valve, the first and second interfaces of the first three-way valve, the peristaltic pump, the first and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a passage, and starts the peristaltic pump to extract the mother liquid to rinse the pipeline;

[0022] S3. Close the first interface of the third three-way valve, open the second and third interfaces of the third three-way valve, and let the mother liquid after rinsing flow into the waste liquid pool;

[0023] S4. The control module controls the liquid level sensor to read the liquid capacity in the selected mother liquid bottle and pure water bottle to determine whether the configuration requirements are met. If not, an alarm is issued and the system is paused. If satisfied, the system proceeds to the next step.

[0024] S5. The control module controls the multi-way valve to connect the interface of pure water, the front interface of the multi-way valve, the first and second interfaces of the first three-way valve, the peristaltic pump, the first and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a passage, fill the quality control cup with pure water, and the liquid level monitoring and overflow device performs in-place monitoring and feedback;

[0025] S6. The control module controls the front interface and the first terminal interface of the multi-way valve, the first and third interfaces of the first three-way valve, the start of the injection pump, the second and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to construct a passage to pump pure water back into the wastewater pool. The amount of water pumped is jointly controlled by the liquid level monitoring and overflow device, the wastewater liquid level sensor and the injection pump or one of them is selectively controlled;

[0026] S7. The control module controls the multi-way valve to connect the interface of the selected mother liquid bottle and the front-end interface, the first and third interfaces of the first three-way valve, the injection pump to start, the second and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a passage, and inject the mother liquid into the quality control cup. The amount of the injected mother liquid is monitored by the liquid level monitoring and overflow device;

[0027] S8. The control module controls the multi-way valve to connect the interface of the air filter and the front-end interface, the first and second interfaces of the first three-way valve, the peristaltic pump, the first and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a passage, and controls the peristaltic pump to start extracting air to shake the solution in the quality control cup;

[0028] S9. The control module controls the multi-way valve to connect the pure water interface and the front-end interface, the first and third interfaces of the first three-way valve, start the injection pump, the second and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a pathway, and injects pure water into the quality control cup to fix the volume, completing the configuration of the required standard solution. The amount of pure water injected is monitored by the liquid level monitoring and overflow device.

[0029] Compared with the prior art, the present invention has outstanding substantive features and significant progress. Specifically, the present invention uses fewer equipment such as multi-way valves, three-way valves, peristaltic pumps, syringe pumps, pipelines, waste liquid pools, wastewater pools, containers, etc. to construct a universal pipeline design. By switching the passages and opening and closing of the three-way valves, multi-way valves, peristaltic pumps, and syringe pumps, the system performs different operations, and the configuration of various types of quality control liquids can be achieved on one quality control instrument. The number of key components used is greatly reduced compared with traditional remote quality control systems, which greatly reduces the complexity of the system and the workload of operation and maintenance, thereby reducing costs.

[0030] Furthermore, since the system uses liquid level sensors in multiple locations, it can not only provide accurate configuration of quality control liquids with multiple parameters, but also provide usage reminders for mother liquor, pure water, waste water, and waste liquid, thereby achieving more precise control.

[0031] Furthermore, the mother liquid end and the pure water end are connected to a multi-way valve, which adopts a modular design. It can be compatible with the quality control requirements of various solutions, and is easy to expand and convenient to use.

[0032] Furthermore, according to the flexible configuration method designed for the system, the precision control of the quality control liquid configuration is ensured by the injection pump back-drawing processing and incremental configuration method. At the same time, combined with the detection of the liquid level sensor, the precision control of each process can be further guaranteed, thereby ensuring the final quality control accuracy or calibration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the module composition of the remote quality control system suitable for the water quality multi-parameter monitor in the present invention. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0035] like Figure 1 As shown, a remote quality control system suitable for a water quality multi-parameter monitor includes a water quality multi-parameter monitor, a quality control cup, a multi-way valve, a peristaltic pump, a syringe pump, a control module, an industrial computer, an air filter, a pure water bottle and three mother liquid bottles, two of which store mother liquid 1 and mother liquid 2, and the other mother liquid bottle stores turbidity mother liquid.

[0036] Liquid level sensors are respectively arranged in the pure water bottle and the three mother liquid bottles, and each liquid level sensor is connected to a control module for liquid level monitoring. When the liquid level sensor triggers an alarm, it reminds the staff that the mother liquid or pure water is insufficient, so that it can be replenished in time.

[0037] The pure water bottle, air filter and three mother liquid bottles are respectively connected to different interfaces of the multi-way valve. In principle, they are connected on the same side of the multi-way valve, and the pure water is close to the front end interface of the multi-way valve, and the turbidity mother liquid is close to the rear end interface of the multi-way valve. Another branch of pure water is connected to the second end interface of the multi-way valve so that the outlet pipeline of the turbidity mother liquid can be covered when the pipeline is cleaned. The multi-way valve is controlled by a control module to construct different valve paths and combine different solutions. The air filter is used to aerate and shake the mixed liquid.

[0038] The front end interface of the multi-way valve is connected to the first interface of the first three-way valve (shown as three-way valve 1), shown as the T0 pipeline, the second interface and the third interface of the first three-way valve are respectively connected to the inlet of the peristaltic pump and the injection pump, shown as the G3 and G4 pipelines, the outlets of the peristaltic pump and the injection pump are respectively connected to the first interface and the second interface of the second three-way valve (shown as three-way valve 2), shown as the G5 and G6 pipelines, the third interface of the second three-way valve is connected to the first interface of the third three-way valve, shown as the G7 pipeline, the second interface of the third three-way valve (shown as three-way valve 3) is connected to the quality control cup, shown as the G9 pipeline, the peristaltic pump and the injection pump are both controlled by the control module for configuring different target solutions, and the three three-way valves are all controlled by the control module to control the fluid's travel path and the on-off of the path.

[0039] The monitoring pipeline of the water quality multi-parameter monitor is connected to the quality control cup, and the water quality multi-parameter monitor communicates with the industrial computer to detect water quality parameters and upload them;

[0040] A liquid level monitoring and overflow device is arranged in the quality control cup, and the overflow outlet of the liquid level monitoring and overflow device is connected to the waste liquid pool through a G10 pipe. A waste liquid level sensor is installed in the waste liquid pool, and the figure shows the liquid level sensor 5. The liquid level monitoring and overflow device and the waste liquid level sensor are controlled by a control module to monitor the liquid level of the quality control cup and the waste liquid pool.

[0041] The first interface at the end of the multi-way valve is connected to the wastewater tank through the T7 pipeline for storing back-pumped water. A wastewater level sensor is installed in the wastewater tank, and the figure shows the level sensor 4. The wastewater level sensor is connected to the control module for monitoring the liquid level in the wastewater tank.

[0042] The second interface at the end of the multi-way valve is connected to a pure water bottle through a T6 pipeline, and is used in conjunction with the peristaltic pump to clean the valve path and pipeline.

[0043] The industrial computer communicates with the control module and is used to configure parameters of the control module.

[0044] The pure water bottle and three mother liquid bottles are stored in a refrigerator to ensure the stability of the properties of the pure water bottle, mother liquid and turbidity mother liquid.

[0045] The method of using the above remote quality control system is explained in conjunction with an example of mother solution preparation.

[0046] First, the industrial computer receives the configuration instruction, and based on the known concentration of the mother solution 1 of 500 mg / L, the volume of the quality control cup of 200 mL, and the concentration of the total nitrogen quality control solution to be configured of 20 mg / L, the required amount of mother solution is calculated to be 8 mL, and then the configuration process is started, including the following steps:

[0047] S1. The required amount of mother solution is calculated to be 8 mL;

[0048] S2. The control module controls the T2 interface of the multi-way valve, the T0 interface of the multi-way valve, the first and second interfaces of the first three-way valve, the G3 pipeline, the peristaltic pump, the G5 pipeline, the first and third interfaces of the second three-way valve, the G7 pipeline, the first and second interfaces of the third three-way valve, the G9 pipeline and the quality control cup to build a pathway, and starts the peristaltic pump to extract the mother liquid to rinse the pipeline.

[0049] S3. Close the first interface of the third three-way valve, open the second and third interfaces of the third three-way valve, and let the mother liquid after rinsing flow into the waste liquid pool through the G8 pipeline. The waste liquid level sensor in the waste liquid pool senses the amount of waste liquid to avoid overflow.

[0050] S4. The control module controls the liquid level sensor to read the liquid capacity of mother solution 1 and pure water to determine whether it meets the current configuration requirements. If not, an alarm will be issued and the technician will be notified to replenish the solution. If it does, proceed to the next step.

[0051] S5. The control module controls the T1 interface of the multi-way valve, the T0 interface of the multi-way valve, the first and second interfaces of the first three-way valve, the G3 pipeline, the peristaltic pump, the G5 pipeline, the first and third interfaces of the second three-way valve, the G7 pipeline, the first and second interfaces of the third three-way valve, the G9 pipeline and the quality control cup to build a passage, fill the quality control cup with pure water, and the liquid level monitoring and overflow device performs in-place monitoring and feedback until the overflow liquid enters the waste liquid pool, indicating that the pure water is full.

[0052] S6. The control module controls the front-end interface T0 and the first end interface T7 of the multi-way valve, the first and third interfaces of the first three-way valve, the G4 pipeline, the start of the injection pump, the G6 pipeline, the second and third interfaces of the second three-way valve, the G7 pipeline, the first and second interfaces of the third three-way valve, the G9 pipeline and the quality control cup to build a pathway to draw 15 ml of pure water back into the wastewater pool. The amount of water drawn is jointly controlled by the liquid level monitoring and overflow device, the wastewater liquid level sensor and the injection pump or one of them is selectively controlled.

[0053] S7. The control module controls the T2 interface and the front-end interface T0 of the multi-way valve, the first and third interfaces of the first three-way valve, the G4 pipeline, the start of the injection pump, the G6 pipeline, the second and third interfaces of the second three-way valve, the G7 pipeline, the first and second interfaces of the third three-way valve, the G9 pipeline and the quality control cup to build a pathway, and inject 8 ml of mother liquor into the quality control cup. The amount of mother liquor injected is monitored by the liquid level monitoring and overflow device.

[0054] S8. The control module controls the multi-way valve to connect the air filter interface T5 and the front-end interface T0, the first and second interfaces of the first three-way valve, the G3 pipeline, the peristaltic pump, the G5 pipeline, the first and third interfaces of the second three-way valve, the G7 pipeline, the first and second interfaces of the third three-way valve, the G9 pipeline and the quality control cup to build a pathway, and controls the peristaltic pump to start extracting air to shake the solution in the quality control cup.

[0055] S9. The control module controls the multi-way valve to connect the pure water interface T1 and the front-end interface T0, the first and third interfaces of the first three-way valve, the G4 pipeline, start the injection pump, the G6 pipeline, the second and third interfaces of the second three-way valve, the G7 pipeline, the first and second interfaces of the third three-way valve, the G9 pipeline and the quality control cup to build a pathway, inject pure water into the quality control cup to fix the volume, complete the configuration of the required standard solution, and the amount of pure water injected is monitored by the liquid level monitoring and overflow device.

[0056] After completing the above steps, the standard solution is prepared, and the industrial computer controls the water quality multi-parameter monitor to absorb the quality control solution for quality control or calibration testing.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for using a remote quality control system for a water quality multi-parameter monitoring instrument, characterized in that: The remote quality control system suitable for the water quality multi-parameter monitor includes the water quality multi-parameter monitor, a quality control cup, a multi-way valve, a peristaltic pump, a syringe pump, a control module, an industrial computer, an air filter, a pure water bottle and multiple mother liquid bottles; Liquid level sensors are respectively arranged in the pure water bottle and the plurality of mother liquid bottles, and each liquid level sensor is connected to a control module for liquid level monitoring; The pure water bottle, the air filter and the plurality of mother liquid bottles are respectively connected to different interfaces of the multi-way valve, and the multi-way valve is controlled by a control module to construct different valve paths and combine different solutions; The front end interface of the multi-way valve is connected to the quality control cup through a switchable peristaltic pump passage and a syringe pump passage, the front end interface of the multi-way valve is connected to the first interface of the first three-way valve, the second interface and the third interface of the first three-way valve are respectively connected to the inlets of the peristaltic pump and the syringe pump, the outlets of the peristaltic pump and the syringe pump are respectively connected to the first interface and the second interface of the second three-way valve, the third interface of the second three-way valve is connected to the first interface of the third three-way valve, the second interface of the third three-way valve is connected to the quality control cup, and the three three-way valves are all controlled by the control module to control the running path of the fluid and the on-off of the path; the peristaltic pump and the syringe pump are both controlled by the control module to configure different target solutions; The monitoring pipeline of the water quality multi-parameter monitor is connected to the quality control cup, and the water quality multi-parameter monitor communicates with the industrial computer to detect water quality parameters and upload them; A liquid level monitoring and overflow device is arranged in the quality control cup, the overflow outlet of the liquid level monitoring and overflow device is connected to the waste liquid pool, a waste liquid level sensor is installed in the waste liquid pool, and the liquid level monitoring and overflow device and the waste liquid level sensor are controlled by the control module to monitor the liquid levels of the quality control cup and the waste liquid pool; The first interface at the end of the multi-way valve is connected to a wastewater tank for storing back-pumped water. A wastewater level sensor is installed in the wastewater tank. The wastewater level sensor is connected to a control module for monitoring the liquid level in the wastewater tank. The second interface at the end of the multi-way valve is connected to a pure water bottle, and cooperates with the peristaltic pump to clean the valve path and pipeline; The industrial computer communicates with the control module to configure parameters of the control module; The pure water bottle and the plurality of mother liquid bottles are stored in a refrigerator; Use by following the steps below: S1. Calculate the required amount of mother solution according to the concentration of mother solution in the selected mother solution bottle, the volume of the quality control cup and the concentration of the quality control solution to be configured; S2. The control module controls the multi-way valve to connect the interface of the selected mother liquid bottle, the front end interface of the multi-way valve, the first and second interfaces of the first three-way valve, the peristaltic pump, the first and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a passage, and starts the peristaltic pump to extract the mother liquid to rinse the pipeline; S3. Close the first interface of the third three-way valve, open the second and third interfaces of the third three-way valve, and let the mother liquid after rinsing flow into the waste liquid pool; S4. The control module controls the liquid level sensor to read the liquid capacity in the selected mother liquid bottle and pure water bottle to determine whether the configuration requirements are met. If not, an alarm is issued and the system is paused. If satisfied, the system proceeds to the next step. S5. The control module controls the multi-way valve to connect the interface of pure water, the front interface of the multi-way valve, the first and second interfaces of the first three-way valve, the peristaltic pump, the first and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a passage, fill the quality control cup with pure water, and the liquid level monitoring and overflow device performs in-place monitoring and feedback; S6. The control module controls the front interface and the first terminal interface of the multi-way valve, the first and third interfaces of the first three-way valve, the start of the injection pump, the second and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to construct a passage to pump pure water back into the wastewater pool. The amount of water pumped is jointly controlled by the liquid level monitoring and overflow device, the wastewater liquid level sensor and the injection pump or one of them is selectively controlled; S7. The control module controls the multi-way valve to connect the interface of the selected mother liquid bottle and the front-end interface, the first and third interfaces of the first three-way valve, the injection pump to start, the second and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a passage, and inject the mother liquid into the quality control cup. The amount of the injected mother liquid is monitored by the liquid level monitoring and overflow device; S8. The control module controls the multi-way valve to connect the interface of the air filter and the front-end interface, the first and second interfaces of the first three-way valve, the peristaltic pump, the first and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a passage, and controls the peristaltic pump to start extracting air to shake the solution in the quality control cup; S9. The control module controls the multi-way valve to connect the pure water interface and the front-end interface, the first and third interfaces of the first three-way valve, start the injection pump, the second and third interfaces of the second three-way valve, the first and second interfaces of the third three-way valve and the quality control cup to build a pathway, and injects pure water into the quality control cup to fix the volume, completing the configuration of the required standard solution. The amount of pure water injected is monitored by the liquid level monitoring and overflow device.

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