An on-line quality control instrument for water quality monitoring

Abstract

The utility model discloses a kind of online quality control instruments for water quality monitoring, including box and the door plate hinged in its front side, the door plate front side is fixedly connected with display screen, the door plate rear side is fixedly connected with control panel, the box top is fixedly connected with top cover, the box inner bottom is fixedly connected with waste bin, further include: sampling mechanism: the sampling mechanism includes fixedly connected in the fixed plate of the box inner middle part, the fixed plate front side middle part is fixedly connected with mixing bin, the mixing bin right side is provided with quantitative bin, the quantitative bin left side is fixedly connected with first plunger pump, the mixing bin rear side is provided with drain valve, the drain valve top is provided with liquid medicine bin. The utility model discloses online quality control instrument for water quality monitoring has highly integrated, fully automatic, closed loop quality control monitoring effect.

Description

Technical Field

[0001] This utility model relates to the field of online quality control instruments, and in particular to an online quality control instrument for water quality monitoring. Background Technology

[0002] Online water quality control instruments are key auxiliary equipment in the field of environmental monitoring. Their main functions are to verify standard samples and test spike recovery rates for automatic water quality analyzers, and to analyze total phosphorus, total nitrogen, ammonia nitrogen, etc. in water bodies. This is to evaluate the accuracy and reliability of the analyzer data and is a core means to ensure the data quality of water quality monitoring stations.

[0003] However, existing water quality control instruments mostly rely on manual on-site preparation and addition of standard samples, which is inefficient and prone to human error. Meanwhile, existing automated equipment on the market often has limited functionality and low integration; or although it can achieve partial automation, its system consists of multiple dispersed modules connected by complex external pipelines, resulting in poor coordination between units and difficulty in unified maintenance, making it difficult to achieve intensive and intelligent quality control management within a limited space. For example, in an automatic water quality monitoring station, if it is necessary to simultaneously verify the standards of four analyzers for total phosphorus, total nitrogen, ammonia nitrogen, and permanganate index, the existing technical solution might require deploying multiple single-function quality control devices, or having maintenance personnel carry various standard solutions and equipment to the site to manually prepare and inject the standards for each analyzer in turn. This process is not only time-consuming and labor-intensive, requiring high skill levels, but also prone to inaccurate verification results due to numerous operational steps, such as inaccurate pipetting, cross-contamination, or timing errors. This renders the quality control itself meaningless and fails to achieve true unattended and remote quality control. Utility Model Content

[0004] This utility model discloses an online quality control instrument for water quality monitoring, aiming to solve the technical problem that existing water quality control instruments rely on manual on-site preparation and addition of standard samples, which is inefficient and prone to human error. This makes it difficult to achieve intensive and intelligent quality control management.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An online quality control instrument for water quality monitoring includes a housing and a door panel hinged to its front side. A display screen is fixedly connected to the front side of the door panel, and a control panel is fixedly connected to the rear side of the door panel. A top cover is fixedly connected to the top of the housing, and a waste bin is fixedly connected to the bottom of the housing. The instrument also includes: a sampling mechanism comprising a fixed plate fixedly connected to the middle of the housing, a mixing chamber fixedly connected to the middle of the front side of the fixed plate, a quantitative chamber located to the right of the mixing chamber, a first plunger pump fixedly connected to the left side of the quantitative chamber, a drain valve located to the rear of the mixing chamber, and a reagent tank located at the top of the drain valve; and an analysis mechanism fixedly connected to the left side of the front side of the fixed plate.

[0006] By adopting the above technical solution, the sampling mechanism, through its highly integrated flow path design and coordinated control, achieves automatic and precise preparation of the verification standard solution and the spiked recovery solution. The fixed plate serves as the structural carrier, integrating the mixing chamber, the metering chamber, the drain valve, and multiple reagent chambers into a compact unit. Its operation is as follows: the control panel instructs the drain valve to connect to a specific reagent chamber, and the first plunger pump then actuates, precisely delivering a metered amount of high-concentration mother liquor from that chamber to the mixing chamber; simultaneously, another first plunger pump synchronously pumps zero-sample water or the water sample to be tested from the metering chamber into the mixing chamber. Within this chamber, the mother liquor and water sample are thoroughly mixed and precisely diluted to the user-preset target concentration of the standard sample or spiked recovery solution. This device modularly integrates dispersed mother liquor storage, precise metering, and solution mixing functional units onto a fixed plate, replacing the traditional cumbersome and bulky external multi-unit combination mode. This not only greatly reduces the size of the equipment, but more importantly, it completes the entire closed-loop solution preparation process within a single system. This fundamentally avoids residues, contamination, and metering errors caused by long pipeline connections, ensuring high accuracy and consistency of the prepared samples.

[0007] As a further embodiment of this utility model: the analysis mechanism includes a flow divider fixedly connected to the front side of the fixed plate, a second plunger pump and a third plunger pump are respectively provided at the top and bottom of the flow divider, a feed pipe is provided on the right side of the second plunger pump, and an analyzer is provided at the bottom of the third plunger pump.

[0008] By adopting the above technical solution, the analytical mechanism constitutes a complete sample analysis and detection unit within the device. It achieves seamless physical and logical integration of four independent and parallel analytical channels with the aforementioned sampling mechanism, realizing a fully integrated and automated process from sample preparation to analysis and determination. Four split chambers, four sets of second and third plunger pumps, and four analyzers are integrated into a multi-tasking parallel processing system on the front side of the fixed plate. Specific samples prepared in the mixing chamber by the sampling mechanism are precisely pumped into designated split chambers via a feed pipe by the corresponding second plunger pump for temporary storage. Subsequently, the dedicated third plunger pump for that channel is activated, delivering the sample in the split chamber at a controlled flow rate and volume without loss to the analyzer inlet built into the same channel. After the analyzer completes its measurement, the resulting waste liquid can be directly discharged into the waste bin at the bottom of the casing. This design, which deeply integrates multiple complete analysis channels into a single enclosure, overturns the traditional architecture of separating the quality control instrument from the external analyzer. It transforms the water quality control process from a complex operation that requires coordinating multiple independent devices into a "one-click" closed-loop process that can be completed within a single device. This greatly improves the integration, automation level, and operational reliability of the monitoring station, while significantly reducing external interference and maintenance requirements.

[0009] In summary, this application includes at least one of the following beneficial technical effects: 1. It integrates the traditional dispersed functions of mother liquor storage, precise metering and solution mixing into one unit, and automatically and accurately completes the entire process of preparing standard samples and spiked recovery solutions in a compact space. This not only greatly reduces the size of the equipment, but also fundamentally avoids sample residue, cross-contamination and metering inaccuracies caused by long pipeline connections, and significantly improves the reliability, accuracy and consistency of solution preparation operations.

[0010] 2. It realizes the integration and automation of the entire process from sample reception and temporary storage to analysis and detection and waste liquid discharge, enabling a single device to independently complete the synchronous quality control analysis of multi-parameter water samples. This completely changes the loose mode of separation between quality control instruments and external analyzers in traditional solutions, greatly improving the integration, automation level and operating efficiency of the entire monitoring system, while effectively reducing external interference and maintenance complexity.

[0011] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an online quality control instrument for water quality monitoring proposed in this utility model.

[0013] Figure 2 This is an unfolded view of the door panel of an online quality control instrument for water quality monitoring proposed in this utility model.

[0014] Figure 3 This is a schematic diagram of the fixing plate of an online quality control instrument for water quality monitoring proposed in this utility model.

[0015] Figure 4 This is a schematic diagram of the sampling mechanism of an online quality control instrument for water quality monitoring proposed in this utility model.

[0016] Figure 5 This is a schematic diagram of the reagent tank of an online quality control instrument for water quality monitoring proposed in this utility model. Figure 6 This is a schematic diagram of the analytical mechanism of an online quality control instrument for water quality monitoring proposed in this utility model.

[0017] In the attached diagram: 1. Housing; 2. Door panel; 3. Display screen; 4. Control panel; 5. Top cover; 6. Waste bin; 7. Fixing plate; 8. Mixing bin; 9. Quantitative bin; 10. First plunger pump; 11. Exhaust valve; 12. Liquid tank; 13. Diverter bin; 14. Second plunger pump; 15. Third plunger pump; 16. Analyzer; 17. Feed pipe. Detailed Implementation

[0018] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1 to 5 An online quality control instrument for water quality monitoring includes a housing 1 and a door panel 2 hinged to its front side. A display screen 3 is fixedly connected to the front side of the door panel 2, and a control panel 4 is fixedly connected to the rear side of the door panel 2. A top cover 5 is fixedly connected to the top of the housing 1, and a waste bin 6 is fixedly connected to the bottom inside the housing 1. The instrument also includes: a sampling mechanism: the sampling mechanism includes a fixed plate 7 fixedly connected to the middle of the inside of the housing 1, a mixing bin 8 fixedly connected to the middle of the front side of the fixed plate 7, a quantitative bin 9 set to the right side of the mixing bin 8, a first plunger pump 10 fixedly connected to the left side of the quantitative bin 9, a drain valve 11 set to the rear side of the mixing bin 8, and a chemical liquid bin 12 set to the top of the drain valve 11; and an analysis mechanism: the analysis mechanism is fixedly connected to the left side of the front side of the fixed plate 7.

[0020] Specifically, the preparation command received by the control panel 4 drives the valve 11 to precisely connect its inlet to the target reagent tank 12. Subsequently, the first plunger pump 10, linked to the valve, starts, drawing a preset volume of high-concentration mother liquor from the reagent tank 12 and injecting it into the mixing tank 8. Simultaneously, another pipeline controlled by the first plunger pump 10 draws a calculated volume of zero-sample water or the water sample to be tested from the quantitative tank 9 and synchronously delivers it to the same mixing tank 8. Within the sealed chamber of the mixing tank 8, the mother liquor and the water sample are thoroughly mixed under the action of fluid force, achieving precise dilution and ultimately forming a quality control sample with the target concentration required by the user, preparing for subsequent analysis.

[0021] Among them, the mixing chamber 8 and the metering chamber 9 are fixedly connected to the front side of the fixed plate 7 by a fixed seat. There are six liquid medicine chambers 12, which are fixedly connected to the rear side of the fixed plate 7 by a fixed seat. The drain valve 11 is fixedly connected to the surface of the fixed plate 7 by a fixed seat. This layout realizes the high-density modular integration of the core fluid components in three-dimensional space, greatly optimizes the utilization rate of the internal space of the box 1, and minimizes the flow path connection, which not only reduces pipeline redundancy and potential dead volume.

[0022] The mixing chamber 8 has three hoses fixedly connected to the top right side. The hose on the left is fixedly connected to the drain valve 11, the hose in the middle is the cleaning water inlet pipe, and the first plunger pump 10 is installed in the middle of the hose. The hose on the right is fixedly connected to the quantitative chamber 9. The separate pipe design ensures that liquids from different sources do not interfere with each other before entering the mixing chamber 8. At the same time, the integrated cleaning pipeline can automatically flush the mixing chamber 8 and related flow paths after each liquid preparation or analysis cycle, effectively preventing cross-contamination between different batches of samples and ensuring the accuracy of the analysis results.

[0023] The system includes four first plunger pumps 10, which are used for precise extraction of mother liquor, quantitative delivery of zero-sample water, emptying of mixing chamber 8 and discharge of waste liquid, and as a mixing drive for drain valve 11. This achieves multi-task parallel processing and dedicated pipelines for fluid delivery. An overflow pipe is installed on the top right side of the quantitative chamber 9. The overflow pipe is fixedly connected to the waste chamber 6 through the first plunger pump 10, which can automatically maintain the stability of the liquid level in the chamber and avoid over-addition. The bottom of the mixing chamber 8 is fixedly connected to the waste chamber 6 through the first plunger pump 10, which enables the rapid and thorough discharge of waste liquid and cleaning liquid. The left side of the drain valve 11 is connected to the mixing pipe through the first plunger pump 10. The drain valve 11 is fixedly connected to the six medicine chambers 12 through a hose.

[0024] Reference Figure 1 , Figure 2 , Figure 3 and Figure 6In a preferred embodiment, the analysis mechanism includes a diversion chamber 13 fixedly connected to the front side of the fixed plate 7. A second plunger pump 14 and a third plunger pump 15 are respectively provided at the top and bottom of the diversion chamber 13. A feed pipe 17 is provided on the right side of the second plunger pump 14, and an analyzer 16 is provided at the bottom of the third plunger pump 15.

[0025] Specifically, after the sample preparation in the mixing chamber 8 is completed, the control panel 4 will start the corresponding second plunger pump 14. This pump will transfer a quantitative amount of finished liquid from the mixing chamber 8 to the designated split chamber 13 for temporary storage and buffering through the feed pipe 17. Subsequently, the temporarily stored sample is directly delivered to the sample inlet of the analyzer 16 integrated in the same analysis channel, and the analyzer 16 will automatically complete the detection and analysis of the sample. After the analysis process is completed, the control panel 4 will trigger the start of the third plunger pump 15 dedicated to this channel to completely discharge the waste liquid remaining in the analyzer 16 and the associated flow path, and collect it all into the waste bin 6 at the bottom of the box 1, thereby realizing the fully automated closed-loop management of sample analysis and waste liquid cleaning.

[0026] The system comprises four components: a diversion chamber 13, a second plunger pump 14, a third plunger pump 15, an analyzer 16, and a feed pipe 17. These components form a fully parallel multi-channel analysis unit. The four diversion chambers 13 are equidistantly fixed to the left side of the front of the fixed plate 7. The bottom of the analyzer 16 is fixedly connected to the bottom of the housing 1. The second plunger pump 14 is fixedly connected to the mixing chamber 8 via the feed pipe 17. This allows the equipment to perform quality control analysis on four different parameters simultaneously or at different times, significantly improving the data processing capacity and analysis efficiency per unit time, and meeting the water station's requirements for synchronous monitoring of multiple parameters.

[0027] The top of the third plunger pump 15 is fixedly connected to the bottom of the split chamber 13 via a hose, the bottom of the split chamber 13 is fixedly connected to the analyzer 16 via a hose, and the bottom of the third plunger pump 15 is fixedly connected to the waste bin 6 via a hose. After the analyzer 16 completes the measurement, the waste liquid remaining in the split chamber 13, the analyzer 16, and the connecting flow path is quickly evacuated to ensure that there is no liquid accumulation inside the system, providing a clean flow path environment for the next analysis cycle. This is crucial for maintaining the long-term stable operation of the analyzer 16 and avoiding background interference caused by sample residue.

[0028] Reference Figure 1 , Figure 2 and Figure 3 In a preferred embodiment, the display screen 3 and the control panel 4 form a circuit through a line. The control panel 4 monitors and controls the first plunger pump 10, the drain valve 11, the second plunger pump 14 and the third plunger pump 15 through the line. The top cover 5 has an addition port corresponding to the medicine tank 12.

[0029] Specifically, the display screen 3 and control panel 4 form a closed-loop control circuit through wiring, achieving close coupling between human-machine interaction and system execution. Control panel 4, as the central command unit, centrally monitors and programmatically controls all actuators, including the first plunger pump 10, exhaust valve 11, second plunger pump 14, and third plunger pump 15, ensuring the automation, standardization, and repeatability of the entire quality control process. The top cover 5 has addition ports corresponding to the six liquid storage tanks 12. This user-friendly design allows operators to conveniently and safely replenish and replace the mother liquor without opening the housing 1 or disassembling parts, greatly simplifying daily maintenance.

[0030] Working Principle: During use, the host computer sends a quality control command to the device control panel 4, which clearly specifies the quality control items to be performed, the target concentration, and the corresponding analyzer channel 16. After receiving the command, the control panel 4 first starts the sampling mechanism: the control valve 11 is rotated to a specific position so that its inlet is connected to the drug solution tank 12 corresponding to the command, and at the same time, the first plunger pump 10 is driven to accurately extract a preset volume of high-concentration mother liquor from the drug solution tank 12 and deliver it to the mixing tank 8. Another first plunger pump 10 simultaneously extracts a calculated and accurate volume of zero sample water or water sample to be tested from the quantitative tank 9 and injects it into the same mixing tank 8. In the mixing tank 8, the mother liquor and water sample are fully mixed and accurately diluted through fluid dynamics, finally forming a standardized sample or spiked recovery solution that meets the preset concentration requirements. After preparation, the analysis mechanism is then started: the second plunger pump 14 corresponding to the target analysis channel commanded by the control panel 4 is started, and the solution in the mixing tank 8 is delivered through the feed pipe 17. All sample solutions are transferred to the designated split chamber 13 for temporary storage and buffering. Subsequently, the sample temporarily stored in the split chamber 13 is directly transported to the inlet of the integrated analyzer 16 in the same analysis channel through the built-in flow path under system pressure or gravity. The analyzer 16 automatically completes the detection and analysis of the sample and uploads the measured data to the host computer for subsequent verification rate or spike recovery rate calculation. After the analysis process is completely completed, the control panel 4 finally starts the dedicated third plunger pump 15 for this channel to perform a cleaning and waste discharge operation, completely discharging all residual waste liquid inside the analyzer 16 and related flow paths and collecting it all into the waste bin 6 at the bottom of the housing 1. At the same time, according to the preset program, the relevant flow paths can also be rinsed with cleaning water to ensure no risk of cross-contamination. Thus, a closed-loop automated quality control operation is completely realized in a highly integrated housing 1, from instruction parsing, automatic liquid preparation, accurate delivery, analysis detection to final waste liquid cleaning.

[0031] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. An online quality control instrument for water quality monitoring, comprising a housing (1) and a door panel (2) hinged to its front side, wherein a display screen (3) is fixedly connected to the front side of the door panel (2), a control panel (4) is fixedly connected to the rear side of the door panel (2), a top cover (5) is fixedly connected to the top of the housing (1), and a waste bin (6) is fixedly connected to the bottom of the housing (1), characterized in that, Also includes: Sampling mechanism: The sampling mechanism includes a fixed plate (7) fixedly connected to the middle of the box (1), a mixing chamber (8) fixedly connected to the middle of the front side of the fixed plate (7), a quantitative chamber (9) is provided on the right side of the mixing chamber (8), a first plunger pump (10) is fixedly connected to the left side of the quantitative chamber (9), a drain valve (11) is provided on the rear side of the mixing chamber (8), and a medicine liquid chamber (12) is provided on the top of the drain valve (11); Analysis mechanism: The analysis mechanism is fixedly connected to the left side of the front of the fixed plate (7).

2. The on-line quality control instrument for water quality monitoring according to claim 1, characterized in that, The mixing chamber (8) and the metering chamber (9) are fixedly connected to the front side of the fixed plate (7) by a fixing seat. There are six liquid medicine chambers (12). The six liquid medicine chambers (12) are fixedly connected to the rear side of the fixed plate (7) by a fixing seat. The drain valve (11) is fixedly connected to the surface of the fixed plate (7) by a fixing seat.

3. The on-line quality control instrument for water quality monitoring according to claim 1, characterized in that, Three hoses are fixedly connected to the top right side of the mixing chamber (8). The hose on the left side is fixedly connected to the drain valve (11), the hose in the middle is a clean water inlet pipe, and the first plunger pump (10) is installed in the middle of the hose in the middle. The hose on the right side is fixedly connected to the metering chamber (9).

4. The on-line quality control instrument for water quality monitoring according to claim 1, characterized in that, There are four first plunger pumps (10). An overflow pipe is provided on the top right side of the metering chamber (9). The overflow pipe is fixedly connected to the waste chamber (6) through the first plunger pump (10). The bottom of the mixing chamber (8) is fixedly connected to the waste chamber (6) through the first plunger pump (10). The left side of the drain valve (11) is connected to the mixing pipe through the first plunger pump (10). The drain valve (11) is fixedly connected to the six medicine liquid chambers (12) through a hose.

5. The online quality control instrument for water quality monitoring according to claim 1, characterized in that, The analysis mechanism includes a diversion chamber (13) fixedly connected to the front side of the fixed plate (7). A second plunger pump (14) and a third plunger pump (15) are respectively provided at the top and bottom of the diversion chamber (13). A feed pipe (17) is provided on the right side of the second plunger pump (14), and an analyzer (16) is provided at the bottom of the third plunger pump (15).

6. The on-line quality control instrument for water quality monitoring according to claim 5, characterized in that, The number of the diversion chamber (13), the second plunger pump (14), the third plunger pump (15), the analyzer (16), and the feed pipe (17) are all four. The four diversion chambers (13) are fixedly connected at equal intervals to the left side of the front of the fixed plate (7). The bottom of the analyzer (16) is fixedly connected to the bottom of the box (1). The second plunger pump (14) is fixedly connected to the mixing chamber (8) through the feed pipe (17).

7. The on-line quality control instrument for water quality monitoring according to claim 5, characterized in that, The top of the third plunger pump (15) is fixedly connected to the bottom of the diversion chamber (13) via a hose, the bottom of the diversion chamber (13) is fixedly connected to the analyzer (16) via a hose, and the bottom of the third plunger pump (15) is fixedly connected to the waste bin (6) via a hose.

8. The on-line quality control instrument for water quality monitoring according to claim 1, characterized in that, The display screen (3) and control panel (4) form a circuit through the lines. The control panel (4) monitors and controls the first plunger pump (10), the drain valve (11), the second plunger pump (14) and the third plunger pump (15) through the lines. The top cover (5) has an addition port corresponding to the medicine tank (12) on its top.

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