An auxiliary system for automatic weekly quality control of five-parameter instruments in water quality automatic stations

Abstract

The invention discloses an auxiliary system suitable for automatic weekly quality control of five-parameter instruments in water quality automatic stations, which relates to the technical field of water quality monitoring. The system is composed of a plurality of key units to form a complete system and operate in an orderly manner. The data processing and control system guides the self-inspection and reagent inspection of each unit. The injection pump accurately controls sampling and reagent addition, the peristaltic pipeline transmits liquid, the multi-way valve switches the flow path, and the quality control verification introduces standards or quality control samples according to the program. After the instrument measures, the data is handed over to the processing system for comparison and analysis to judge the instrument status. The peristaltic pipeline and the reagent adding device are automatically corrected according to the situation in the comparison and correction stage. The processing system records all the data and stores them in a storage module, and transmits them to a remote monitoring center in real time with the help of a communication module to realize intelligent remote operation and maintenance. The injection pump and the multi-way valve work according to specific structures and principles, and the flow path is accurately switched under the system command. The two cooperate with each other to meet the strict requirements of water quality monitoring on data accuracy and reliability.

Description

Technical Field

[0001] The invention relates to the technical field of water quality monitoring, and in particular to an auxiliary system suitable for automatic weekly quality control of five-parameter instruments in water quality automatic stations. Background Art

[0002] At present, in the daily operation of automatic water quality stations, the weekly quality control of five-parameter instruments (usually including temperature, pH value, dissolved oxygen, turbidity and conductivity) is still an important and tedious link.

[0003] 1. Rely on manual operation;

[0004] 2. It is easily affected by human factors, such as operational errors, inaccurate records, etc., which affect the accuracy and reliability of the data. To this end, we propose an auxiliary system for automatic weekly quality control of five-parameter instruments in water quality automatic stations to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an auxiliary system suitable for automatic weekly quality control of five-parameter instruments in water quality automatic stations, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0007] The present invention provides an auxiliary system suitable for automatic weekly quality control of five-parameter instruments in water quality automatic stations, including system components and system processes;

[0008] The system components specifically include the following multiple units:

[0009] A101, flow injection sampling unit: injection pump, sampling needle;

[0010] A102, multi-way valve: electric multi-way switching valve and valve position detection sensor;

[0011] A103, Peristaltic piping: peristaltic pump tube and peristaltic pump drive device;

[0012] A104, sensor group: temperature sensor and pressure sensor:

[0013] A105, data processing and control system: controller, data storage module and communication module;

[0014] A106, reagent storage and supply unit: reagent bottles and automatic reagent adding device;

[0015] The system process specifically includes the following steps:

[0016] S101, preparation stage: when the system starts, the data processing and control system will self-check each unit and the reagent status at the same time, and prompt the operation and maintenance personnel if there is any abnormality;

[0017] S102, sampling and rinsing: the flow injection sampling unit sucks the sample and switches to the rinsing flow path through the multi-way valve to clean the components. During this period, the temperature and pressure sensors monitor the relevant data and transmit them to the control system for recording and analysis;

[0018] S103, quality control verification: according to the preset operation, the standard or quality control sample is introduced into the instrument measurement flow path. After the instrument measures the five parameters, the data is transmitted to the control system, which calculates the deviation through algorithm comparison and determines the instrument status;

[0019] S104, comparison and calibration: When the deviation exceeds the range, the system automatically starts the calibration procedure according to the situation, adds calibration reagents through the peristaltic pipeline and the reagent adding device, and then repeatedly measures and compares until the data meets the quality control requirements;

[0020] S105, Data recording and transmission: All kinds of data during the quality control process are recorded and stored in detail by the control system and transmitted to the remote monitoring center in real time for remote management and analysis by operation and maintenance personnel;

[0021] Preferably, when the preparation phase is started, the data processing and control system first performs a self-inspection on each unit, including calibration of the sensor, valve position detection of the multi-way valve, and sealing inspection of the peristaltic pipeline to ensure that the system is in normal working condition, and checks the inventory and expiration date of various reagents in the reagent storage and supply unit. If there is a shortage or expiration, the operation and maintenance personnel are prompted to replenish or replace them.

[0022] Preferably, the sampling and rinsing includes a flow injection sampling unit that sucks the sample through a peristaltic pipeline, switches the sample through a multi-way valve, enters the rinsing flow path, rinses the pipeline and instrument components, removes residual impurities, and discharges the rinsing waste liquid into a waste liquid collection container through the peristaltic pipeline. The sample temperature is measured using a temperature sensor, and the pressure sensor monitors the pressure changes during the rinsing process. The data is transmitted in real time to a data processing and control system for recording and analysis.

[0023] Preferably, the quality control check needs to be carried out in accordance with preset procedures and standards, and the standard solution or quality control sample is introduced into the instrument measurement flow path through the switching of a multi-way valve. The instrument measures the temperature, pH value, dissolved oxygen, turbidity and conductivity parameters, and the measurement data is transmitted to the data processing and control system. The data processing and control system uses a built-in algorithm to compare and analyze the measurement data with the standard value, calculate the deviation value, and determine whether the instrument is working properly.

[0024] Preferably, if the deviation value exceeds a preset range during the comparison and calibration, the system starts a calibration procedure. According to the type and size of the deviation, the data processing and control system adds an appropriate amount of calibration reagent to the sample flow path through the peristaltic line and the reagent adding device to calibrate the instrument. After calibration, measurement and comparison are performed again until the instrument measurement data meets the quality control requirements.

[0025] Preferably, the data record transmission includes all data in the entire quality control process, sample information, measurement data, comparison results and correction operations, which are recorded by the data processing and control system and stored in the data storage module. The data is transmitted to the remote monitoring center in real time through the communication module. The operation and maintenance personnel can view the quality control data and system operation status through the software platform of the monitoring center and conduct remote management and analysis.

[0026] Preferably, the injection pump controls the volume of sampling and reagent addition to ensure the accuracy and repeatability of each operation. The sampling needle has a self-cleaning function to prevent cross contamination and adapt to different sample viscosities and components. The electric multi-way switching valve realizes the switching of different flow paths. The valve position detection sensor monitors the valve position status of the multi-way valve in real time and feeds back to the control system to detect valve position abnormalities and make adjustments.

[0027] Preferably, the peristaltic pipeline is used to transport samples, reagents and waste liquids, and has sealing and wear resistance. The peristaltic pump drive controls the rotation speed of the peristaltic pump and adjusts the flow rate of the liquid. The temperature sensor measures the temperature of the sample and reagent, and performs temperature compensation for temperature-sensitive chemical reactions and measurement parameters. The pressure sensor monitors the pressure changes in the pipeline to prevent abnormal situations such as pipeline blockage or leakage.

[0028] Preferably, the controller is responsible for coordinating the operation of each unit, receiving sensor signals, and performing data processing and decision-making according to preset programs and algorithms. The data storage module uses a solid-state hard drive to store all data in the quality control process. The communication module supports wired and wireless communication methods to transmit quality control data to a remote monitoring center in real time and receive remote control instructions at the same time. The reagent bottles store various quality control reagents, and the automatic reagent adding device adds reagents to the sample flow path according to the instructions of the control system.

[0029] Preferably, the injection pump includes a tube body, a fixing frame is fixedly connected to the top of the tube body, a servo motor is fixedly connected to one side of the fixing frame, a driving gear is fixedly connected to the output end of the servo motor, the driving gear is meshingly connected to the driven gear, a threaded roller is sleeved on the middle part of the driven gear, the driven gear is slidably connected to the threaded roller, the driven gear is non-rotatingly connected to the threaded roller, the threaded roller is threadedly connected to the fixing frame, a liquid inlet pipe is fixedly connected to the top of the sampling needle, the sampling needle is connected to the tube body through the liquid inlet pipe, the multi-way valve includes a liquid storage tube, one end of the liquid storage tube is fixedly connected to a liquid discharge pipe, the liquid storage tube is connected to the tube body through the liquid discharge pipe, a plurality of evenly arranged liquid dispensing tubes are fixedly connected to the top of the liquid storage tube, and electric valves are installed in the liquid dispensing tube, the liquid inlet pipe and the liquid discharge pipe.

[0030] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0031] The automatic weekly quality control auxiliary system for the five-parameter instrument of the automatic water quality station in the present invention is a complete system composed of multiple key units and operates in an orderly manner. In the system startup preparation stage, the data processing and control system leads the self-inspection of each unit and the reagent inspection to ensure the normal basic status. During sampling and rinsing, the injection pump accurately controls the sampling and reagent addition, the sampling needle is contaminated, the peristaltic pipeline transmits the liquid, the multi-way valve switches the flow path, and the sensor monitors the parameters and feedbacks to ensure that the rinsing process is accurate and efficient. Quality control inspection introduces standards or quality control samples according to the procedure. After the instrument measures, the data is handed over to the processing system for comparison and analysis to determine the status of the instrument. If the deviation exceeds the limit, the comparison and correction stage will automatically correct it through the peristaltic pipeline and the reagent addition device according to the situation, and repeatedly measure and optimize. In the final data recording and transmission stage, the processing system records all data and stores it in the storage module, and transmits it to the remote monitoring center in real time with the help of the communication module. The operation and maintenance personnel can remotely manage and analyze it to realize intelligent remote operation and maintenance. The syringe pump and multi-way valve work according to specific structures and principles. The former precisely controls the inflow and outflow of liquids through servo motors and other components, while the latter accurately switches the flow path under system instructions. The two work together to effectively ensure the efficient, precise and stable operation of the entire quality control system, meeting the strict requirements of water quality monitoring for data accuracy and reliability.

[0032] The overall automation and intelligence of the whole process of weekly quality control of the five-parameter water quality instruments in water stations can be realized, thereby greatly improving the efficiency of operation and maintenance and reducing labor costs. It has broad application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0034] Figure 1It is a schematic diagram of the system flow of the present invention;

[0035] Figure 2 is a schematic diagram of the system components of the present invention;

[0036] Figure 3 It is a schematic diagram of the structure of the injection pump of the present invention;

[0037] Figure 4 The present invention Figure 3 The enlarged structural diagram at A in the middle;

[0038] Figure 5 It is the system flow diagram of the present invention;

[0039] Figure 6 It is a structural schematic diagram of the data comparison and correction module of the present invention.

[0040] In the figure:

[0041] 1. Injection pump; 101. Tube body; 102. Fixed frame; 103. Servo motor; 104. Driving gear; 105. Driven gear; 106. Twitching roller; 107. Threaded roller; 2. Sampling needle; 201. Liquid inlet tube; 3. Multi-way valve; 301. Liquid storage tube; 302. Liquid discharge tube; 303. Liquid dispensing tube; 304. Electric valve. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0043] See also Figure 1-Figure 6 The present invention provides an auxiliary system suitable for automatic weekly quality control of five-parameter instruments in water quality automatic stations. The system components specifically include a flow injection sampling unit, a multi-way valve 3, a peristaltic pipeline, a sensor group, a data processing and control system, and a reagent storage and supply unit; the system process specifically includes a preparation stage, sampling and rinsing, quality control verification, comparison and calibration, and data recording and transmission;

[0044] During the preparation phase, when it is started, the data processing and control system first performs a self-check on each unit, including sensor calibration, valve position detection of the multi-way valve 3, and tightness check of the peristaltic pipeline to ensure that the system is in normal working condition, and checks the inventory and validity period of various reagents in the reagent storage and supply unit. If there is any shortage or expiration, the operation and maintenance personnel are prompted to replenish or replace them. The data processing and control system calibrates the sensor and combines the sensor group to ensure the accuracy of the sensor measurement data, providing reliable basic data monitoring capabilities for the entire quality control process. The valve position detection sensor of the multi-way valve 3 cooperates with the data processing and control system to perform valve position detection, which can ensure that the electric multi-way switching valve accurately switches different flow paths in the subsequent process, such as sample flow path, reagent flow path, etc., to avoid problems such as solution misflow and mixing abnormalities caused by valve position errors, and ensure the accuracy and stability of system operation.

[0045] In the sampling and rinsing, the flow injection sampling unit sucks the sample through the peristaltic pipeline, switches through the multi-way valve 3, enters the rinsing flow path, rinses the pipeline and instrument components, removes residual impurities, and discharges the rinsing waste liquid to the waste liquid collection container through the peristaltic pipeline. The temperature sensor is used to measure the sample temperature, and the pressure sensor monitors the pressure change during the rinsing process. The injection pump 1 controls the volume of sampling and reagent addition to ensure the accuracy and repeatability of each operation. The valve position detection sensor monitors the valve position status of the multi-way valve 3 in real time and feeds back to the control system. If the valve position is abnormal, it will be adjusted. The peristaltic pipeline is used to transmit samples, reagents and waste liquids, and has sealing and wear resistance. The peristaltic pump drive device controls the speed of the peristaltic pump and adjusts the flow rate of the liquid. The temperature sensor measures the temperature of the sample and reagent to prevent abnormal situations such as pipeline blockage or leakage. The peristaltic pipeline sealing inspection is associated with the peristaltic pump tube and the peristaltic pump drive device, which ensures the stability and controllability of the liquid flow rate, so that the liquid transmission volume in each link is accurate and correct.

[0046] By checking the reagent inventory and validity period in the reagent storage and supply unit, the reagent preparation status can be known in advance, ensuring the continuity and effectiveness of the reagent supply during the quality control process, avoiding measurement errors or process interruptions caused by insufficient or expired reagents, and ensuring that the entire system runs smoothly according to the preset program. The quality control verification needs to be carried out according to the preset procedures and standards. The standard solution or quality control sample is introduced into the instrument measurement flow path through the multi-way valve 3. The instrument measures the temperature, pH value, dissolved oxygen, turbidity and conductivity parameters, and the measurement data is transmitted to the data processing and control system. The data processing and control system uses the built-in algorithm to compare and analyze the measurement data with the standard value and calculate the deviation value. If the deviation value exceeds the preset range during the comparison and correction, the system starts the correction program. This process relies on the coordination of the instrument, the multi-way valve 3, the data processing and control system and other devices. The standard or quality control sample is introduced through the multi-way valve 3. After the instrument measures, the data is transmitted to the data processing and control system for analysis and comparison, forming a closed-loop feedback mechanism, continuously optimizing the instrument measurement accuracy, ensuring long-term stable quality of quality control data, so that the instrument is always in good working condition, and meeting the requirements of water quality monitoring for data accuracy.

[0047] The controller is responsible for coordinating the operation of each unit, receiving sensor signals, and performing data processing and decision-making according to preset programs and algorithms. The data storage module uses a solid-state hard drive to store all data in the quality control process. The communication module supports wired and wireless communication methods to transmit quality control data to the remote monitoring center in real time and receive remote control instructions at the same time. The reagent bottle stores various quality control reagents, and the automatic reagent adding device adds reagents to the sample flow path according to the instructions of the control system.

[0048] Finally, data recording and transmission include all data in the entire quality control process, sample information, measurement data, comparison results and correction operations, which are recorded by the data processing and control system and stored in the data storage module. The data is transmitted to the remote monitoring center in real time through the communication module. The operation and maintenance personnel can view the quality control data and system operation status through the software platform of the monitoring center, and conduct remote management and analysis. The communication module supports wired and wireless communication methods, and transmits data to the remote monitoring center in real time. Combined with the remote monitoring center software platform, the operation and maintenance personnel can view the quality control data and system operation status without geographical restrictions, conduct remote management and analysis, and realize the intelligent remote management of the weekly quality control work of the five-parameter instrument of the water quality automatic station, which improves the flexibility and efficiency of operation and maintenance management, reduces labor costs and operation and maintenance difficulties, and ensures the continuous and stable operation of the system.

[0049] The injection pump 1 includes a tube body 101, a fixing frame 102 is fixedly connected to the top of the tube body 101, a servo motor 103 is fixedly connected to one side of the fixing frame 102, a driving gear 104 is fixedly connected to the output end of the servo motor 103, the driving gear 104 is meshingly connected to the driven gear 105, a threaded roller 107 is sleeved in the middle of the driven gear 105, the driven gear 105 is slidably connected to the threaded roller 107, the driven gear 105 is non-rotatingly connected to the threaded roller 107, the threaded roller 107 is threadedly connected to the fixing frame 102, a liquid inlet pipe 201 is fixedly connected to the top of the sampling needle 2, and the sampling needle 2 is connected to the liquid inlet pipe 201 through the liquid inlet pipe The tube 201 is connected to the tube body 101, and the multi-way valve 304 includes a liquid storage tube 301, one end of the liquid storage tube 301 is fixedly connected to a liquid discharge tube 302, the liquid storage tube 301 is connected to the tube body 101 through the liquid discharge tube 302, and a plurality of evenly arranged liquid distribution tubes 303 are fixedly connected to the top of the liquid storage tube 301, and electric valves 304 are installed in the liquid distribution tubes 303, the liquid inlet tube 201 and the liquid discharge tube 302. When sampling or reagent addition operations are required, the rotation of the servo motor 103 drives the driving gear 104 to rotate, and the driving gear 104 engages with the driven gear 105, so that the driven gear 105 rotates accordingly. Since the driven gear 105 and the threaded roller 107 are connected in a sliding and non-rotating manner, when the driven gear 105 rotates, the threaded roller 107 can only move linearly along the axial direction under the thread restriction of the fixed frame 102. As the threaded roller 107 moves linearly, the bottom of the threaded roller 107 is fixedly connected with the twitching roller 106, and the pressure in the tube body 101 changes. When the threaded roller 107 moves in a specific direction, a negative pressure is formed in the tube body 101, and the external sample or reagent is sucked into the tube body 101 through the liquid inlet tube 201 at the top of the sampling needle 2 connected to the tube body 101, realizing the sampling function; when the threaded roller 107 moves in the opposite direction, the pressure in the tube body 101 increases, and the liquid in the tube body 101 is pushed out through the connected pipeline, realizing the reagent addition function. By accurately controlling the rotation direction, speed and rotation time of the servo motor 103, the volume of sampling and reagent addition can be accurately controlled to ensure the accuracy and repeatability of each operation.

[0050] The liquid storage tube 301, as the main part of the multi-way valve 3, plays the role of liquid convergence and diversion. The liquid discharge tube 302 connects the liquid storage tube 301 with the tube body 101 of the injection pump 1 to realize the transmission of liquid between the two. The multiple liquid dispensing tubes 303 on the top of the liquid storage tube 301 are used to connect different flow paths, such as different reagent bottles, sample sources or other processing units. Electric valves 304 are installed in the liquid dispensing tube 303, the liquid inlet tube 201 and the liquid discharge tube 302. When it is necessary to switch the flow path, the data processing and control system sends instructions to the corresponding electric valve 304 according to the preset program. When the reagent in a reagent bottle is to be introduced into the measurement flow path, the electric valve 304 in the corresponding liquid dispensing tube 303 is opened. At the same time, the electric valve 304 in the liquid discharge tube 302 and the liquid inlet tube 201 also adjusts the opening and closing state as needed, so that the reagent flows from the reagent bottle through the liquid dispensing tube 303 into the liquid storage tube 301 under the action of the pressure difference. Then it enters the tube body 101 of the injection pump 1 or other target flow path through the discharge pipe 302, thereby realizing fast and accurate switching between different flow paths to meet the complex requirements of the five-parameter instrument of the water quality automatic station for different liquid transmission paths in the quality control process. The multi-way valve 3 switches the flow path according to the preset program and standard, and accurately introduces the standard solution or quality control sample into the instrument measurement flow path. The valve position detection sensor ensures the accuracy of the switching, provides the instrument with accurate measurement samples, makes the measurement data comparable and reliable, and provides accurate basic data for subsequent deviation analysis.

[0051] The system realizes the automation and intelligence of the whole process, and automatically completes the quality control verification, comparison and data recording of the instrument by using the flow injection sampling unit, multi-way valve 3, peristaltic pipeline and other units for rinsing and calibration, without manual intervention. At the same time, the system also has higher accuracy and reliability. Through precise algorithms and advanced data processing technology, the system can automatically analyze the comparison results, timely discover and correct instrument deviations, and ensure the accuracy of monitoring data.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An auxiliary system suitable for automatic weekly quality control of five-parameter instruments in water quality automatic stations, characterized in that: Includes system components and system processes; The system components specifically include the following multiple units: A101, flow injection sampling unit: injection pump, sampling needle; A102, multi-way valve: electric multi-way switching valve and valve position detection sensor; A103, Peristaltic piping: Peristaltic pump tube and peristaltic pump drive device; A104, sensor group: temperature sensor and pressure sensor: A105, data processing and control system: controller, data storage module and communication module; A106, reagent storage and supply unit: reagent bottles and automatic reagent adding device; The system process specifically includes the following steps: S101, preparation stage: when the system starts, the data processing and control system will self-check each unit and the reagent status at the same time, and prompt the operation and maintenance personnel if there is any abnormality; S102, sampling and rinsing: the flow injection sampling unit sucks the sample and switches to the rinsing flow path through the multi-way valve to clean the components. During this period, the temperature and pressure sensors monitor the relevant data and transmit them to the control system for recording and analysis; S103, quality control verification: according to the preset operation, the standard or quality control sample is introduced into the instrument measurement flow path. After the instrument measures the five parameters, the data is transmitted to the control system, which calculates the deviation through algorithm comparison and determines the instrument status; S104, comparison and calibration: When the deviation exceeds the range, the system automatically starts the calibration procedure according to the situation, adds calibration reagents through the peristaltic pipeline and the reagent adding device, and then repeatedly measures and compares until the data meets the quality control requirements; S105, Data recording and transmission: All kinds of data in the whole quality control process are recorded and stored in detail by the control system and transmitted to the remote monitoring center in real time for remote management and analysis by operation and maintenance personnel.

2. According to claim 1, an auxiliary system suitable for automatic weekly quality control of five-parameter instruments in water quality automatic stations is characterized in that: When the preparation phase is started, the data processing and control system first performs a self-inspection on each unit, including sensor calibration, multi-way valve position detection, and peristaltic pipeline sealing inspection to ensure that the system is in normal working condition, and checks the inventory and expiration date of various reagents in the reagent storage and supply unit. If there is a shortage or expiration, the operation and maintenance personnel are prompted to replenish or replace them.

3. The auxiliary system for automatic weekly quality control of five-parameter instruments in water quality automatic stations according to claim 1 is characterized in that: The sampling and rinsing includes a flow injection sampling unit that sucks in the sample through a peristaltic pipeline, switches the sample through a multi-way valve, enters the rinsing flow path, rinses the pipeline and instrument components, removes residual impurities, and discharges the rinsing waste liquid into a waste liquid collection container through the peristaltic pipeline. A temperature sensor is used to measure the sample temperature, and a pressure sensor monitors the pressure changes during the rinsing process. The data is transmitted in real time to a data processing and control system for recording and analysis.

4. According to claim 1, an auxiliary system suitable for automatic weekly quality control of five-parameter instruments in water quality automatic stations is characterized in that: The quality control verification needs to be carried out in accordance with preset procedures and standards, and the standard solution or quality control sample is introduced into the instrument measurement flow path through the switching of the multi-way valve. The instrument measures the temperature, pH value, dissolved oxygen, turbidity and conductivity parameters, and transmits the measurement data to the data processing and control system. The data processing and control system uses the built-in algorithm to compare and analyze the measurement data with the standard value, calculate the deviation value, and determine whether the instrument is working properly.

5. According to claim 1, an auxiliary system suitable for automatic weekly quality control of five-parameter instruments in water quality automatic stations is characterized in that: If the deviation value exceeds the preset range during the comparison and calibration, the system starts the calibration procedure. According to the type and size of the deviation, the data processing and control system adds an appropriate amount of calibration reagent to the sample flow path through the peristaltic line and the reagent adding device to calibrate the instrument. After calibration, measurement and comparison are performed again until the instrument measurement data meets the quality control requirements.

6. The auxiliary system for automatic weekly quality control of five-parameter instruments in water quality automatic stations according to claim 1 is characterized in that: The data record transmission includes all data in the entire quality control process, sample information, measurement data, comparison results and correction operations, which are recorded by the data processing and control system and stored in the data storage module. The data is transmitted to the remote monitoring center in real time through the communication module. The operation and maintenance personnel can view the quality control data and system operation status through the software platform of the monitoring center and conduct remote management and analysis.

7. The auxiliary system for automatic weekly quality control of five-parameter instruments in water quality automatic stations according to claim 1 is characterized in that: The injection pump controls the volume of sampling and reagent addition to ensure the accuracy and repeatability of each operation. The sampling needle has a self-cleaning function to prevent cross contamination and adapt to different sample viscosities and components. The electric multi-way switching valve realizes the switching of different flow paths. The valve position detection sensor monitors the valve position status of the multi-way valve in real time and feeds back to the control system to detect abnormal valve position and make adjustments.

8. The auxiliary system for automatic weekly quality control of five-parameter instruments in water quality automatic stations according to claim 1 is characterized in that: The peristaltic pipeline is used to transmit samples, reagents and waste liquids, and has sealing and wear resistance. The peristaltic pump drive controls the rotation speed of the peristaltic pump and adjusts the flow rate of the liquid. The temperature sensor measures the temperature of the sample and reagent, and performs temperature compensation for temperature-sensitive chemical reactions and measurement parameters. The pressure sensor monitors the pressure changes in the pipeline to prevent abnormal situations such as pipeline blockage or leakage.

9. The auxiliary system for automatic weekly quality control of five-parameter instruments in water quality automatic stations according to claim 1, characterized in that: The controller is responsible for coordinating the operation of each unit, receiving sensor signals, and performing data processing and decision-making according to preset programs and algorithms. The data storage module uses a solid-state hard drive to store all data in the quality control process. The communication module supports wired and wireless communication methods to transmit quality control data to a remote monitoring center in real time and receive remote control instructions at the same time. The reagent bottle stores various quality control reagents, and the automatic reagent adding device adds reagents to the sample flow path according to the instructions of the control system.

10. The auxiliary system for automatic weekly quality control of five-parameter instruments in water quality automatic stations according to claim 1, characterized in that: The injection pump includes a tube body, a fixing frame is fixedly connected to the top of the tube body, a servo motor is fixedly connected to one side of the fixing frame, a driving gear is fixedly connected to the output end of the servo motor, the driving gear is meshingly connected to the driven gear, a threaded roller is sleeved on the middle part of the driven gear, a twitching roller is fixedly connected to the bottom of the threaded roller, the driven gear is slidably connected to the threaded roller, the driven gear is non-rotatingly connected to the threaded roller, the threaded roller is threadedly connected to the fixing frame, a liquid inlet pipe is fixedly connected to the top of the sampling needle, the sampling needle is connected to the tube body through the liquid inlet pipe, the multi-way valve includes a liquid storage pipe, one end of the liquid storage pipe is fixedly connected to a liquid discharge pipe, the liquid storage pipe is connected to the tube body through the liquid discharge pipe, a plurality of evenly arranged liquid dispensing pipes are fixedly connected to the top of the liquid storage pipe, and electric valves are installed in the liquid dispensing pipe, the liquid inlet pipe and the liquid discharge pipe.

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