A water quality analyzer system

Abstract

The present invention discloses a water quality analyzer system, which includes a water sample distribution device and a reagent distribution device. The water sample distribution device includes a first distribution module and a first pipette. The exhaust pipe orifice of the first distribution module is fixedly installed with a first two-position three-way valve through a pipeline. The drain pipe of the first pipette is fixedly installed with a first pinch valve through a first photoelectric switch. One end on the right side of the first distribution module is fixedly installed with a first two-position two-way valve group through a pipeline. The reagent distribution device includes a second distribution module and a second pipette. The drain pipe of the second pipette is fixedly installed with a second pinch valve through a second photoelectric switch. One end on the left side of the second distribution module is fixedly installed with a second two-position two-way valve group through a pipeline. In the water quality analyzer system of the present invention, each fluid flows into the digestion reaction cell in almost exactly the same process flow, which can ensure that various fluids taken by the system have excellent volume accuracy and improve the measurement accuracy of the system.

Description

Technical Field

[0001] The present invention relates to the field of water quality analysis, and particularly to a water quality analyzer system. Background Art

[0002] Based on the requirements that an on-line analyzer needs to have high stability, low failure rate, short measurement time, and also higher cost performance, the current metering methods used in on-line analyzers are as follows: peristaltic pump plus photoelectric quantification, plunger pump plus photoelectric quantification, peristaltic pump metering, plunger pump metering, vacuum metering, etc. Currently, most on-line analyzers use multi-way valves or drain valves to switch water samples and reagents, and are relatively prone to misjudgment and metering errors caused by water sample impurities, chromaticity, and easily crystallizable substances, as well as liquid leakage and blockage due to multi-way valve blockage, and especially the dead volume residue of the drain valve, resulting in high failure rate and low stability. At the same time, it brings an increase in cost due to the replacement of the entire multi-way valve and discharge when a certain valve is damaged. The photoelectric judgment of liquid level leads to slow pump speed and repeated determination, resulting in long measurement time. Summary of the Invention

[0003] The main object of the present invention is to provide a water quality analyzer system, which can effectively solve the problems in the background art.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A water quality analyzer system includes a water sample distribution device and a reagent distribution device. The water sample distribution device includes a first distribution module and a first pipette. The exhaust pipe port of the first distribution module is fixedly installed with a first two-position three-way valve through a pipeline. The drain pipe of the first pipette is fixedly installed with a first pinch valve through a first photoelectric switch. One end on the right side of the first distribution module is fixedly installed with a first two-position two-way valve group through a pipeline. The reagent distribution device includes a second distribution module and a second pipette. The drain pipe of the second pipette is fixedly installed with a second pinch valve through a second photoelectric switch. One end on the left side of the second distribution module is fixedly installed with a second two-position two-way valve group through a pipeline. The reagent distribution device is arranged on the left side of the water sample distribution device. One end at the top of the first two-position three-way valve is fixedly installed with a fluid driving device through a pipeline. One end at the bottom of the fluid driving device is fixedly installed with a fifth two-position three-way valve through a pipeline. One end on the left side of the first distribution module of the water sample distribution device is fixedly installed with a first pinch valve through a pipeline. One end on the right side of the second distribution module of the reagent distribution device is fixedly installed with a second pinch valve through a pipeline. The bottom of the first distribution module of the water sample distribution device is fixedly installed with a second two-position three-way valve through a pipeline. One end at the bottom of the second two-position three-way valve is fixedly installed with a first high-temperature and high-pressure valve through a pipeline. One end at the bottom of the first high-temperature and high-pressure valve is fixedly installed with a digestion reaction cell through a pipeline. One end at the bottom of the digestion reaction cell is fixedly installed with a second high-temperature and high-pressure valve through a pipeline. One end at the bottom of the second high-temperature and high-pressure valve is fixedly installed with a third two-position three-way valve through a pipeline. One end on the left side of the third two-position three-way valve is fixedly installed with a colorimetric cell through a pipeline. One end at the bottom of the colorimetric cell is fixedly installed with a third pinch valve. One end on the left side of the fifth two-position three-way valve is fixedly installed with a spiral tube through a pipeline. One end on the left side of the spiral tube is fixedly installed with a fourth two-position three-way valve through a pipeline.

[0006] Preferably, the exhaust pipe port of the second distribution module of the reagent distribution device is fixedly installed at the left end of the first two-position three-way valve through a pipeline. The bottom end of the second distribution module of the reagent distribution device is fixedly installed at the left end of the second two-position three-way valve through a pipeline. The common end of the first two-position two-way valve group is fixedly installed at the left end of the fourth two-position three-way valve through a pipeline. The bottom end of the fourth two-position three-way valve is fixedly installed at the right end of the third two-position three-way valve through a pipeline.

[0007] Preferably, the two-position two-way valves in the first two-position two-way valve group are matched according to the amount of standard solution required. When the two-position two-way valve is not needed, the corresponding port is blocked with a plug. The two-position two-way valves in the second two-position two-way valve group are matched according to the amount of reagent required. When the two-position two-way valve is not needed, the corresponding port is blocked with a plug.

[0008] Preferably, the volume of the spiral tube is 1.2 times larger than the volume of the digestion reaction cell.

[0009] Preferably, the colorimetric cell is designed to be detachable.

[0010] Preferably, both outer ends of the digestion reaction cell and the colorimetric cell are reserved with optical fiber jacks which are adjustable, and the optical fibers are respectively connected to a light source and a corresponding photodetector.

[0011] Preferably, the fluid driving device is a driving device that can rotate forward and backward and adjust the speed, and the fluid driving device is a peristaltic pump.

[0012] Preferably, the photoelectric switch is a non-contact signal detector that does not contact the fluid.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In the present invention, by setting the fluid driving device, the water sample, the diluted water sample, the standard solution or the reagent can be driven to pass through their respective corresponding two-way two-position valves, and then reach the pipette for quantification through the distribution module, and flow to the digestion reaction cell under the action of gravity and the driving of the fluid driving device. The fluid is sucked into the pipette through the negative pressure of the fluid driving device and then overflows to the liquid discharge pipe opening, immediately causing a signal change of the photoelectric switch. The corresponding pinch valve opens, the fluid driving device stops rotating, and the corresponding two-way two-position valve of the fluid closes. Since the upper part of the pipette is communicated with the atmosphere at this time, the fluid flows into the digestion reaction cell through gravity and the driving force of the fluid driving device. Therefore, each fluid flows into the digestion reaction cell in almost exactly the same process, which can ensure that the various fluids taken by the system have excellent volume accuracy, improve the measurement accuracy of the system, and also ensure the measurement accuracy. In addition, different proportion sampling can be realized by different numbers of times of fluid sampling. The system can greatly dilute complex actual water samples, improve the measurement range of the analyzer. At the same time, since the fluid sampling process can immediately judge and achieve accurate volume quantification as long as the photoelectric switch signal changes, the measurement speed of the analyzer is improved. In addition, the valve can adopt the maximum inner diameter, and the change of the photoelectric switch signal indicates that the fluid in the pipette overflows, which is not affected by the complex working conditions of the actual water sample, ensuring the high stability and low failure rate of the analyzer. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is a schematic structural diagram of the reagent distribution device of the present invention;

[0017] Figure 3 is a schematic structural diagram of the spiral tube of the present invention;

[0018] Figure 4 is a schematic structural diagram of the digestion reaction cell of the present invention.

[0019] In the figure: 1. water sample distribution device; 2. reagent distribution device; 3. fluid drive device; 4. first pinch valve; 5. second pinch valve; 6. first two-position three-way valve; 7. second two-position three-way valve; 8. first high-temperature and high-pressure valve; 9. second high-temperature and high-pressure valve; 10. third two-position three-way valve; 11. fourth two-position three-way valve; 12. fifth two-position three-way valve; 13. spiral tube; 14. third pinch valve; 15. digestion reaction cell; 16. colorimetric cell; 17. first two-position two-way valve group; 18. second two-position two-way valve group. Detailed implementation mode

[0020] To make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Such as Figures 1-4As shown in the figure, a water quality analyzer system includes a water sample distribution device 1 and a reagent distribution device 2. The water sample distribution device 1 includes a first distribution module and a first pipette. The exhaust pipe orifice of the first distribution module is fixedly installed with a first two-position three-way valve 6 through a pipeline. The drain pipe of the first pipette is fixedly installed with a first pinch valve 4 through a first photoelectric switch. One end on the right side of the first distribution module is fixedly installed with a first two-position two-way valve group 17 through a pipeline. The reagent distribution device 2 includes a second distribution module and a second pipette. The drain pipe of the second pipette is fixedly installed with a second pinch valve 5 through a second photoelectric switch. The exhaust pipe orifice of the second distribution module of the reagent distribution device 2 is fixedly installed at the left end of the first two-position three-way valve 6 through a pipeline. One end on the left side of the second distribution module is fixedly installed with a second two-position two-way valve group 18 through a pipeline. The two-position two-way valves in the first two-position two-way valve group 17 are matched according to the amount of calibration liquid required. When the two-position two-way valve is not needed, the corresponding port is blocked with a plug. The two-position two-way valves in the second two-position two-way valve group 18 are matched according to the amount of reagent required. When the two-position two-way valve is not needed, the corresponding port is blocked with a plug. The reagent distribution device 2 is arranged on the left side of the water sample distribution device 1. One end at the top of the first two-position three-way valve 6 is fixedly installed with a fluid driving device 3 through a pipeline. One end at the bottom of the fluid driving device 3 is fixedly installed with a fifth two-position three-way valve 12 through a pipeline. One end on the left side of the first distribution module of the water sample distribution device 1 is fixedly installed with a first pinch valve 4 through a pipeline. One end on the right side of the second distribution module of the reagent distribution device 2 is fixedly installed with a second pinch valve 5 through a pipeline. The bottom of the first distribution module of the water sample distribution device 1 is fixedly installed with a second two-position three-way valve 7 through a pipeline. The bottom end of the second distribution module of the reagent distribution device 2 is fixedly installed at the left end of the second two-position three-way valve 7 through a pipeline. One end at the bottom of the second two-position three-way valve 7 is fixedly installed with a first high-temperature and high-pressure valve 8 through a pipeline. One end at the bottom of the first high-temperature and high-pressure valve 8 is fixedly installed with a digestion reaction pool 15 through a pipeline. One end at the bottom of the digestion reaction pool 15 is fixedly installed with a second high-temperature and high-pressure valve 9 through a pipeline. One end at the bottom of the second high-temperature and high-pressure valve 9 is fixedly installed with a third two-position three-way valve 10 through a pipeline. One end on the left side of the third two-position three-way valve 10 is fixedly installed with a colorimetric cell 16 through a pipeline. The colorimetric cell 16 is of a detachable design. One end at the bottom of the colorimetric cell 16 is fixedly installed with a third pinch valve 14. One end on the left side of the fifth two-position three-way valve 12 is fixedly installed with a spiral tube 13 through a pipeline. The volume of the spiral tube 13 is more than 1.2 times the volume of the digestion reaction pool. One end on the left side of the spiral tube 13 is fixedly installed with a fourth two-position three-way valve 11 through a pipeline. The common end of the first two-position two-way valve group 17 is fixedly installed at the left end of the fourth two-position three-way valve 11 through a pipeline. The bottom end of the fourth two-position three-way valve 11 is fixedly installed at the right end of the third two-position three-way valve 10 through a pipeline.

[0024] It should be noted that the working process of water sample or reagent sampling of the water quality analyzer system of the present invention is as follows:

[0025] During the process of taking a water sample, close the first pinch valve 4, open the first two-position two-way valve group 17, rotate the fluid driving device 3 counterclockwise. When the first photoelectric switch detects a signal, stop the fluid driving device 3. Open the normally closed end of the second two-position three-way valve 7, open the first high-temperature and high-pressure valve 8 and the second high-temperature and high-pressure valve 9, open the normally closed end of the fifth two-position three-way valve 12, open the second pinch valve 5 and the second two-position two-way valve group 18, and then slowly rotate the fluid driving device 3 clockwise. The taken water sample enters the digestion reaction pool 15, and then all components return to their original states.

[0026] During the process of taking a reagent, close the second pinch valve 5, open the second two-position two-way valve group 18, open the normally closed end of the first two-position three-way valve 6, close the normally open end of the second two-position three-way valve 7, rotate the fluid driving device 3 counterclockwise. When the second photoelectric switch detects a signal, stop the fluid driving device 3. Open the normally open end of the second two-position three-way valve 7, open the first high-temperature and high-pressure valve 8 and the second high-temperature and high-pressure valve 9, open the normally closed end of the fifth two-position three-way valve 12, open the first pinch valve 4 and the second two-position two-way valve group 18, and then slowly rotate the fluid driving device 3 clockwise. The taken water sample enters the digestion reaction pool 15, and then all components return to their original states.

[0027] The working process of water sample dilution in the water quality analyzer system of the present invention is as follows. Taking the water sample dilution to one-third as an example:

[0028] The first step is the water sample taking process as described above;

[0029] The second step is the zero standard taking process. Close the second pinch valve 5, open the first two-position two-way valve group 17, rotate the fluid driving device 3 counterclockwise. When the first photoelectric switch detects a signal, stop the fluid driving device 3. Open the normally closed end of the second two-position three-way valve 7, open the first high-temperature and high-pressure valve 8 and the second high-temperature and high-pressure valve 9, open the normally closed end of the fifth two-position three-way valve 12, open the second pinch valve 5 and the second two-position two-way valve group 18, and then slowly rotate the fluid driving device 3 clockwise. The taken water sample enters the digestion reaction pool 15, and then all components return to their original states, and then repeat it once;

[0030] The third step is to rotate the fluid driving device 3 counterclockwise, open the normally closed end of the fifth two-position three-way valve 12, open the second high-temperature and high-pressure valve 9 and the first high-temperature and high-pressure valve 8, and keep it for a period of time to stir the water sample and distilled water in the digestion reaction pool 15 for stirring;

[0031] Step 4: Close the normally closed end of the fifth two-position three-way valve 12, close the first pinch valve 4, open the normally closed end of the fourth two-position three-way valve 11, open the first two-position two-way valve group 17, rotate the fluid driving device 3 counterclockwise. When the first photoelectric switch detects a signal, stop the fluid driving device 3. Open the normally closed end of the third two-position three-way valve 10 and open the third pinch valve 14 to drain the remaining diluted water sample in the digestion reaction tank 15. Close the normally closed end of the fourth two-position three-way valve 11, close the second two-position two-way valve group 18, open the normally closed end of the second two-position three-way valve 7, open the first high temperature and high pressure valve 8 and the second high temperature and high pressure valve 9. Open the normally closed end of the fifth two-position three-way valve 12, open the first pinch valve 4 and the second two-position two-way valve group 18, and then rotate the fluid driving device 3 slowly clockwise. The sampled water sample enters the digestion reaction tank 15, and then all components return to their original states.

[0032] By replacing the pipettes 1 and 2 with different volumes, the volume of the liquid entering the digestion reaction tank 15 can be adjusted. Different dilution ratios of the actual water sample can be achieved through different numbers of water sampling processes and distilled water sampling processes, so as to increase the measurement range of the water quality analyzer system.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A water quality analyzer system, comprising a water sample distribution device (1) and a reagent distribution device (2), characterized in that: The water sample dispensing device (1) includes a first dispensing module and a first pipette. The exhaust pipe orifice of the first dispensing module is fixedly installed with a first two-position three-way valve (6) through a pipeline. The drain pipe of the first pipette is fixedly installed with a first pinch valve (4) through a first photoelectric switch. One end on the right side of the first dispensing module is fixedly installed with a first two-position two-way valve group (17) through a pipeline. The reagent dispensing device (2) includes a second dispensing module and a second pipette. The drain pipe of the second pipette is fixedly installed with a second pinch valve (5) through a second photoelectric switch. One end on the left side of the second dispensing module is fixedly installed with a second two-position two-way valve group (18) through a pipeline. The reagent dispensing device (2) is arranged on the left side of the water sample dispensing device (1). One end at the top of the first two-position three-way valve (6) is fixedly installed with a fluid driving device (3) through a pipeline. The fluid driving device (3) is a peristaltic pump that can rotate forward and backward and can accurately adjust the speed according to the flow requirements of water samples or reagents, and adjusts the speed by monitoring the flow feedback through a sensor. One end at the bottom of the fluid driving device (3) is fixedly installed with a fifth two-position three-way valve (12) through a pipeline. One end on the left side of the first dispensing module of the water sample dispensing device (1) is fixedly installed with a first pinch valve (4) through a pipeline. One end on the right side of the second dispensing module of the reagent dispensing device (2) is fixedly installed with a second pinch valve (5) through a pipeline. One end at the bottom of the first dispensing module of the water sample dispensing device (1) is fixedly installed with a second two-position three-way valve (7) through a pipeline. One end at the bottom of the second two-position three-way valve (7) is fixedly installed with a first high-temperature and high-pressure valve (8) through a pipeline. One end at the bottom of the first high-temperature and high-pressure valve (8) is fixedly installed with a digestion reaction cell (15) through a pipeline. One end at the bottom of the digestion reaction cell (15) is fixedly installed with a second high-temperature and high-pressure valve (9) through a pipeline. One end at the bottom of the second high-temperature and high-pressure valve (9) is fixedly installed with a third two-position three-way valve (10) through a pipeline. One end on the left side of the third two-position three-way valve (10) is fixedly installed with a colorimetric cell (16) through a pipeline. One end at the bottom of the colorimetric cell (16) is fixedly installed with a third pinch valve (14) through a pipeline. One end on the left side of the fifth two-position three-way valve (12) is fixedly installed with a spiral tube (13) through a pipeline. One end on the left side of the spiral tube (13) is fixedly installed with a fourth two-position three-way valve (11) through a pipeline; Optical fiber jacks are reserved at both outer ends of the digestion reaction cell (15) and the colorimetric cell (16).

2. The water quality analyzer system according to claim 1, characterized in that: The exhaust pipe orifice of the second dispensing module of the reagent dispensing device (2) is fixedly installed at the left end of the first two-position three-way valve (6) through a pipeline. The bottom end of the second dispensing module of the reagent dispensing device (2) is fixedly installed at the left end of the second two-position three-way valve (7) through a pipeline. The common end of the first two-position two-way valve group (17) is fixedly installed at the left end of the fourth two-position three-way valve (11) through a pipeline. The bottom end of the fourth two-position three-way valve (11) is fixedly installed at the right end of the third two-position three-way valve (10) through a pipeline.

3. The water quality analyzer system according to claim 2, characterized in that: The two-way two-position valves in the first two-way two-position valve group (17) are matched according to the amount of the visual standard solution required, and the two-way two-position valves in the second two-way two-position valve group (18) are matched according to the amount of the reagent required.

4. A water quality analyzer system according to claim 3, characterized in that: The volume of the spiral tube (13) is more than 1.2 times the volume of the digestion reaction cell.

5. The water quality analyzer system according to claim 4, characterized in that: The colorimetric cell (16) is designed to be detachable.

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