Water quality analyzer

Abstract

The utility model discloses a water quality analyzer which comprises a shifting turntable, a liquid inlet module, a light source, a detector, a color sensor and a control module, a liquid adding position, a detection position and a first detection container are arranged on the shifting turntable, and the detection position comprises a light splitting detection position and a titration detection position; the liquid inlet module comprises a liquid adding head, and the liquid adding head comprises a first liquid adding head; a first liquid adding head is arranged above each of the liquid adding position and the titration detection position; the first detection container can move to a liquid adding position and a detection position along with the shifting turntable; the light source and the detector are oppositely arranged on the two sides of the light splitting detection position and correspond to the first detection container in position; the color sensor is used for monitoring solution color; the control module is connected with the liquid inlet module, the displacement turntable, the light source, the detector and the color sensor. The device is suitable for on-line detection of various water quality detection items which can be detected by utilizing a spectrometric indexing method, a titration method and an electrode method, the titration end point is accurately judged during titration analysis, and the titration analysis result is relatively accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality analysis, in particular to a water quality analyzer. Background Art

[0002] Titration is a quantitative chemical analysis method used to determine the concentration of specific substances in a solution. As a classic chemical analysis technique, titration is widely used. For example, in the field of water quality analysis, many test items still rely on titration for determination. However, because the titration process requires constant manual observation of the indicator's color change to determine the reaction endpoint, continuous online water quality monitoring is impossible for these test items. Furthermore, when manually identifying the titration endpoint, due to differences in color perception among different operators, inconsistent endpoint determinations for the same titration process can affect the accuracy of the titration results.

[0003] In addition, water quality is currently mostly monitored online continuously through water quality analyzers to assess the safety, applicability and environmental impact of water quality. However, the detection items of existing water quality analyzers are relatively single, making it difficult to continuously take samples for multi-parameter analysis. Utility Model Content

[0004] The purpose of the utility model is to provide a water quality analyzer that can automatically perform titration analysis, accurately determine the titration end point, and is applicable to a variety of detection items.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] A water quality analyzer includes a shift turntable, a liquid inlet module, a light source, a detector, a color sensor and a control module; the shift turntable is provided with a liquid adding position, a detection position and a first detection container, and the detection position includes a spectroscopic detection position and a titration detection position.

[0007] The liquid inlet module includes a liquid adding head that can output liquid, and the liquid adding head includes multiple first liquid adding heads; the first liquid adding heads are arranged above the liquid adding position and the titration detection position; the first detection container can be moved to the liquid adding position and the detection position as the shift turntable rotates.

[0008] The light source and the detector are arranged opposite to each other on both sides of the spectroscopic detection position, and their positions correspond to the first detection container in the spectroscopic detection position; the color sensor is used to monitor the color of the solution in the first detection container located in the titration detection position; the control module connects the liquid inlet module, the shift turntable, the light source, the detector and the color sensor.

[0009] Furthermore, the shift turntable is horizontally arranged, a plurality of first detection containers are provided and are evenly arranged along the circumference of the shift turntable, and the liquid adding position, the spectroscopic detection position and the titration detection position are evenly arranged along the circumference of the shift turntable.

[0010] Furthermore, the liquid inlet module includes a liquid storage module and a plurality of liquid inlet pipelines, the liquid inlet pipelines are connected to the liquid adding head and the liquid storage module, and each liquid inlet pipeline is provided with a peristaltic pump.

[0011] Furthermore, a second detection container is provided on the side of the shift turntable, the liquid adding head further includes a second liquid adding head, the second liquid adding head is located directly above the second detection container, and the color sensor is further used to monitor the color of the solution in the second detection container.

[0012] Furthermore, it includes at least two magnetic stirrers, one of which is arranged below the titration detection position and corresponds to the first detection container, and the other is arranged below the second detection container.

[0013] Furthermore, it also includes a waste discharge pipeline, which is connected to the second detection container and is provided with a peristaltic pump.

[0014] Furthermore, a third detection container is provided on the side of the shift turntable, a pH electrode is provided in the third detection container, and the pH electrode is connected to the control module.

[0015] The utility model has the following beneficial effects:

[0016] The utility model provides a water quality analyzer, which adopts a turntable design and is provided with a liquid adding position, a spectrophotometric detection position, a titration detection position and a corresponding first liquid adding head, a light source, a detector and a color sensor. Under the control of a control module, the first detection container can be transferred to the corresponding liquid adding position by shifting the turntable according to detection requirements for liquid addition, and then transferred to the detection position for spectrophotometric analysis and titration analysis. The utility model is suitable for online detection of various water quality detection items that can be detected by spectrophotometric analysis and titration. In addition, the color sensor is used to identify and monitor the color of the solution during titration analysis, so that the titration end point can be accurately determined, thereby improving the accuracy of the titration analysis result. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the top structure of the utility model.

[0018] Figure 2 This is a front view of the partial structure in area A of the present utility model.

[0019] Explanation of the main component symbols: 1. Shift turntable; 2. Light source; 3. Detector; 4. Liquid adding position; 5. First detection container; 6. Spectrophotometric detection position; 7. Titration detection position; 8. First liquid adding head; 9. Liquid inlet pipeline; 10. Liquid storage module; 11. Second detection container; 12. Second liquid adding head; 13. Magnetic stirrer; 14. Color sensor; 15. Third detection container; AC, detection area; Q1-Q16, peristaltic pump. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods.

[0021] like Figure 1 、 Figure 2 As shown, the utility model discloses a water quality analyzer, which includes a shift turntable 1, a liquid inlet module, a light source 2, a detector 3, a magnetic stirrer 13, a color sensor 14 and a control module. The analyzer is also provided with three detection areas A, B and C for different detections.

[0022] The shift turntable 1 is a horizontally rotatable disc positioned within detection zone A. It is equipped with several liquid-adding positions 4, detection positions, and a light-transmitting first detection container 5. The number of liquid-adding positions 4 and first detection containers 5 is determined based on the number of test items. The detection positions include a spectrophotometric detection position 6 and a titration detection position 7.

[0023] In this embodiment, there are four pairs of liquid adding positions 4 and first detection containers 5 that are matched one to one, and each pair of liquid adding positions 4 and first detection containers 5 is used for detecting ammonia nitrogen, nitrite, calcium ion concentration and total alkalinity, respectively. The first detection containers 5 are evenly arranged along the circumference of the shift turntable 1, and each first detection container 5 can be changed in position as the shift turntable 1 rotates, and then moved to the liquid adding position 4 and the detection position. Corresponding to the first detection container 5, the liquid adding position 4, titration detection position 7 and spectroscopic detection position 6 for detecting total alkalinity, calcium ion concentration, nitrite and ammonia nitrogen are also evenly and sequentially arranged along the circumference of the shift turntable 1. Using the shift turntable 1, not only is it convenient to shift the first detection container 5, providing conditions for autonomous continuous testing, but it also saves space and helps to reduce the overall volume of the analyzer.

[0024] The liquid inlet module includes a liquid storage module 10, multiple liquid adding heads and multiple liquid inlet pipelines 9, wherein the liquid storage module 10 is provided with multiple liquid storage bins (not shown) for storing reagents or other liquids, the liquid adding heads are used to output liquids, the liquid inlet pipelines 9 are arranged between the liquid adding heads and the liquid storage module 10, and are interconnected with the corresponding liquid storage bins in the liquid storage bin, and each liquid inlet pipeline 9 is provided with a peristaltic pump to provide power to extract the corresponding liquid from the liquid storage module 10 and output it. In this embodiment, there are 16 peristaltic pumps, namely peristaltic pumps Q1-16, and the liquid adding heads include multiple first liquid adding heads 8. At least one first liquid adding head 8 is provided above each liquid adding position 4 and above the titration detection position 7 to perform operations such as reagent addition and titration.

[0025] Corresponding to the above-mentioned water quality testing items, the peristaltic pump Q1 and its corresponding liquid inlet pipeline 9 and the first liquid adding head 8 are used for total alkalinity detection liquid inlet, the peristaltic pump Q2-3 and its corresponding liquid inlet pipeline 9 and the first liquid adding head 8 are used for calcium ion concentration detection liquid inlet, the peristaltic pump Q4-5 and its corresponding liquid inlet pipeline 9 and the first liquid adding head 8 are used for nitrite concentration detection liquid inlet, the peristaltic pump Q6-8 and its corresponding liquid inlet pipeline 9 and the first liquid adding head 8 are used for ammonia nitrogen concentration detection liquid inlet, and the peristaltic pump Q9-10 and its corresponding liquid inlet pipeline 9 and the first liquid adding head 8 are used for liquid inlet and titration at the titration detection position 7.

[0026] The light source 2 and the detector 3 are fixedly arranged on both sides of the spectroscopic detection position 6, and their positions correspond to the first detection container 5. When the first detection container 5 is rotated to the spectroscopic detection position 6, the light source 2 and the detector 3 are exactly located on both sides of the first detection container 5 in the spectroscopic detection position 6, which can provide the light required for measurement, detect the absorption or emission of light by the sample, and cooperate in spectroscopic and graduation detection.

[0027] At least two magnetic stirrers 13 are provided, one of which is positioned below the titration detection station 7 and aligned with the first detection container 5. It does not rotate with the shift turntable 1, allowing a stirrer to be placed inside the first detection container 5. When the first dosing head 8 above the titration detection station 7 drips liquid, i.e., during the titration process, the magnetic stirrer 13 drives the stirrer inside the first detection container 5 to rotate and automatically mix the liquid. Similar to the titration detection station 7, a magnetic stirrer 13 can also be provided below each dosing station 4.

[0028] The position of the color sensor 14 corresponds to the position of the titration detection position 7, and the titration detection position 7 is located within the field of view of the color sensor 14. During the titration process, the color sensor 14 can identify and monitor the color of the solution in the first detection container 5 located in the titration detection position 7. By accurately monitoring the solution color, the titration endpoint can be accurately determined, thereby reducing titration analysis errors and obtaining more accurate test results.

[0029] The control module is connected to the liquid inlet module, the shift turntable 1, the light source 2, the detector 3 and the color sensor 14 to control the operation of each component and receive feedback.

[0030] A light-transmissive second detection container 11 is provided on the side of the shift turntable 1, and the second detection container 11 is located in the B detection area. The liquid adding head also includes a second liquid adding head 12, and the second liquid adding head 12 is located directly above the second detection container 11. Similar to the arrangement at the titration detection position 7, the second detection container 11 is also located in the field of view of the color sensor 14. When the second liquid adding head 12 drips liquid, that is, during the titration process, the color of the solution in the second detection container 11 can be identified and monitored by the color sensor 14 to accurately determine the titration end point. A stirring rod can be placed in the second detection container 11, and a magnetic stirrer 13 is also provided below the second detection container 11 for automatic mixing. In addition, a waste discharge pipeline (not shown) is also provided in the B detection area, and the waste discharge pipeline is connected to the second detection container 11, and a peristaltic pump is provided on the waste discharge pipeline, which can automatically discharge waste after the titration analysis is completed.

[0031] In this embodiment, peristaltic pumps Q11-16 and their corresponding inlet lines 9, along with a second testing container 11 and second inlet head in testing zone B, are used to test total water hardness. Titration analysis in testing zones A and B can be performed simultaneously to quickly obtain test results for calcium ion concentration, total alkalinity, and total hardness. Separating total hardness testing into separate zones reduces the impact of ammonia in the total hardness testing reagent on test results in other zones.

[0032] In addition, a third detection container 15 is provided on the side of the shift turntable 1. The third detection container 15 is located in the C detection area, and a pH electrode is provided in the third detection container 15. The pH electrode is connected to the control module and can quickly measure the pH value of the solution in the third detection container 15.

[0033] In summary, the multi-parameter water quality analyzer integrates titration, photometry, and probe methods, and collaborates in multiple areas. It can carry out multiple water quality testing projects at the same time and accurately obtain multiple water quality parameters. It does not require too much manual liquid addition during measurement, which can reduce the impact of reagents on human health.

[0034] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details of the present invention are within the scope of protection of the present invention without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A water quality analyzer, characterized in that: It includes a shift turntable, a liquid inlet module, a light source, a detector, a color sensor and a control module; the shift turntable is provided with a liquid adding position, a detection position and a first detection container, and the detection position includes a spectrophotometric detection position and a titration detection position; The liquid inlet module includes a liquid adding head capable of outputting liquid, and the liquid adding head includes a plurality of first liquid adding heads; the first liquid adding heads are both provided above the liquid adding position and the titration detection position; the first detection container can be moved to the liquid adding position and the detection position as the shift turntable rotates; The light source and the detector are arranged on both sides of the spectrophotometric detection position, and their positions correspond to the first detection container in the spectrophotometric detection position; the color sensor is used to monitor the color of the solution in the first detection container in the titration detection position; The control module is connected to the liquid inlet module, the shift turntable, the light source, the detector and the color sensor.

2. A water quality analyzer according to claim 1, characterized in that: The shift turntable is arranged horizontally, a plurality of first detection containers are provided and are evenly arranged along the circumference of the shift turntable, and the liquid adding position, the spectroscopic detection position and the titration detection position are evenly arranged along the circumference of the shift turntable.

3. A water quality analyzer according to claim 1, characterized in that: The liquid inlet module includes a liquid storage module and a plurality of liquid inlet pipelines. The liquid inlet pipelines are connected with the liquid adding head and the liquid storage module, and each liquid inlet pipeline is provided with a peristaltic pump.

4. A water quality analyzer according to claim 1, characterized in that: A second detection container is provided on the side of the shift turntable. The liquid adding head further comprises a second liquid adding head, which is located directly above the second detection container. The color sensor is also used to monitor the color of the solution in the second detection container.

5. A water quality analyzer according to claim 4, characterized in that: It also includes at least two magnetic stirrers, one of which is arranged below the titration detection position and corresponds to the first detection container, and the other is arranged below the second detection container.

6. A water quality analyzer according to claim 4, characterized in that: It also includes a waste discharge pipeline, which is connected to the second detection container and is provided with a peristaltic pump.

7. A water quality analyzer according to claim 1, characterized in that: A third detection container is provided on the side of the shift turntable. A pH electrode is provided in the third detection container. The pH electrode is connected to the control module.

Images