A device for detecting the concentration of pollutants in water

Abstract

The utility model discloses a device for detecting the concentration of pollutants in water, comprising a pump, quartz tubes for respectively storing sample liquid and reagent, a light source, a sensor for measuring the intensity change of light after penetrating the reaction liquid and converting it into an electrical signal to the data end, the sample liquid and reagent enter the corresponding flow channel and then the corresponding quartz tube through the corresponding joint, the sensor determines the amount of sample liquid and reagent in the quartz tube by detecting the change amount of the light source, and after reaching the target value, the electromagnetic valve controls the flow channel to close. The liquid in the quartz tube is extracted into the cuvette for chemical reaction, the air path electromagnetic valve is opened, and air enters to uniformly mix the reaction liquid in the cuvette; after the reaction is completed, the pump works in reverse, the waste liquid electromagnetic valve is opened, and the reaction liquid in the cuvette is extracted together and discharged from the waste liquid joint. The design of the flow channel reduces the use amount of equipment devices, has fast response speed, and reduces the equipment cost; the reaction liquid can be discharged automatically, has a self-cleaning process, and reduces the maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing, and in particular to a device for detecting the concentration of pollutants in water. Background Technology

[0002] In water quality monitoring, the salicylic acid spectrophotometric method for ammonia nitrogen and the ammonium molybdate spectrophotometric method for phosphate are two commonly used detection methods, both based on the spectrophotometric principle of colorimetric reactions. Ammonia nitrogen detection technologies often use syringe pumps for quantitative reagent and sample dispensing, completing the sample reaction and detection within the detection unit. This process involves complex piping and a large overall equipment size. Microfluidic chip technology offers a solution to reduce the size of detection equipment. Existing microfluidic chip detection technologies employ a method of arranging flow channels within different materials, connecting different structural components with O-rings. The entire flow channel and chip are manufactured using a single material. This method, in order to meet the requirements of integrated chip molding, results in a single chip processing material, making the chip prone to surface contamination during application and limiting its lifespan. The reaction design is complex, requiring the control of a large flow channel to meet powerful functions, and the use of a large number and variety of devices increases equipment costs to some extent. Furthermore, the integrated molding of antifouling materials is costly. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide a device for detecting the concentration of pollutants in water by reducing the amount of equipment and components used and reducing costs through the design of the flow channel.

[0004] Technical solution: The present invention discloses a device for detecting the concentration of pollutants in water, comprising a pump providing power, quartz tubes for storing sample solution and reagent respectively, a light source for signal detection, and a first sensor for measuring the intensity change of light after passing through the reaction solution and converting it into an electrical signal to be sent to the data terminal. The sample solution and reagent respectively enter the corresponding flow channel through the corresponding connector and flow into the corresponding quartz tube. The opening and closing of the flow channel is controlled by the corresponding solenoid valve. The liquid in the quartz tube is drawn together into the cuvette for chemical reaction.

[0005] Furthermore, the second sensor can quantify the volume of the sample liquid and reagent in the quartz tube by detecting changes in the light source. Once the target value is reached, the pump and the corresponding solenoid valve will shut off.

[0006] Furthermore, the connectors are connected to the sample liquid bottle, reagent bottle, and waste liquid bottle respectively via flexible hoses. The connectors include a sample liquid connector, a reagent connector, a waste liquid connector, and a gas path connector for drawing air. The flow channels include a sample liquid flow channel, a reagent flow channel, a waste liquid flow channel, and a gas path flow channel. The solenoid valves include a sample liquid solenoid valve for controlling the opening and closing of the sample liquid flow channel, a reagent solenoid valve for controlling the opening and closing of the reagent flow channel, a waste liquid solenoid valve for controlling the opening and closing of the waste liquid flow channel, and a gas path solenoid valve for controlling the opening and closing of the gas path flow channel.

[0007] Preferably, when the reagent in the quartz tube is drawn into the cuvette, the gas path solenoid valve opens, the pump operates in the forward direction, and air enters the cuvette from the gas path connector along the gas path flow channel, so that the reaction liquid in the cuvette is evenly mixed. After all the sample liquid and reagent are drawn into the cuvette, the pump will continue to draw in air, and the liquid in the cuvette will continuously bubble, which plays a role in mixing evenly.

[0008] Furthermore, after the reaction is complete, the device can clean itself, the pump reverses its operation, the waste liquid solenoid valve opens, and the reaction liquid in the cuvette is drawn out along the waste liquid channel and discharged from the waste liquid connector to the waste liquid bottle. Then the pump and the waste liquid solenoid valve close.

[0009] Beneficial effects: Compared with the prior art, the present invention has the following advantages: (1) The design of the flow channel reduces the amount of equipment components used and the response speed is fast, which reduces equipment costs; (2) The quartz tube and the second sensor are used to quantify sample liquid and reagents, replacing the peristaltic pump which is easily damaged and has high cost; (3) The reaction liquid can be discharged by itself, which has a self-cleaning process, optimizes the protective structure, and reduces maintenance costs. Attached Figure Description

[0010] Figure 1 This is a front structural diagram of the present invention;

[0011] Figure 2 This is a side view of the present invention.

[0012] Figure 3 This is a schematic diagram of the valve baffle of this utility model. Detailed Implementation

[0013] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0014] The device described in this utility model is used to detect the concentration of pollutants in water, mainly measuring the ammonia nitrogen content and phosphate content. Figures 1 to 3 As shown, the device consists of multiple components, each of which can be manufactured separately and can be made of different materials as needed.

[0015] The bottom of the device is equipped with different connectors 5 for connecting the substances required during the measurement process. Connectors 5 are connected to sample bottles, reagent bottles, and waste bottles via flexible hoses. Connectors 5 include a sample connector 51, a reagent connector 52, a waste liquid connector 53, and a gas path connector 54 for air intake. Two reagent connectors 52 are shown in the figure; the number of connectors for each function can be changed according to actual needs. The flow channels 6 include a sample flow channel 61, a reagent flow channel 62, a waste liquid flow channel 63, and a gas path flow channel 64. Connectors 5 are connected to their corresponding flow channels via flexible hoses. For installation and fixation of the hoses, a first through-tube plate 55 and a first pressure plate 56 are installed at the junction of the connector 5 and the hose, and a second through-tube plate 65 and a second pressure plate 66 are installed at the junction of the flow channel and the hose. The through-tube plates and pressure plates are made of corrosion-resistant materials such as PEEK that meet strength requirements. The flow channel 6 is located on the valve baffle 9. The upper ends of the sample liquid flow channel 61 and the reagent flow channel 62 are connected to the quartz tube 2. The valve baffle has a groove 67 for installing a sealing ring to provide a sealing effect. Behind the valve baffle 9 is a solenoid valve 7 for controlling the opening and closing of the flow channels. The solenoid valve 7 includes a sample liquid solenoid valve for controlling the sample liquid flow channel 61, a reagent solenoid valve for controlling the reagent flow channel 62, a waste liquid solenoid valve for controlling the waste liquid flow channel 63, and a gas path solenoid valve for controlling the gas path flow channel 64.

[0016] There are two quartz tubes 2, one for storing reagents and the other for storing sample solutions. Quartz tubes 2 are used to quantify sample solutions and reagents, replacing the existing peristaltic pump, which is less prone to damage and has a lower cost. Light source holders 33 are provided on both sides of quartz tubes 2. The light source holders 33 are made of corrosion-resistant metals such as aluminum alloy, which are lightweight and easy to process. The surface is anodized for scratch resistance. An adapter plate 10 is installed above the light source holders 33. The adapter plate 10 has a flow path connector that connects to the pump 1. The pump 1 is used to provide power. The adapter plate 10 has a first flow channel 11 and a second flow channel 12. One end of the first flow channel 11 is connected to the cuvette 8, and the other end is connected to the flow path connector. One end of the second flow channel 12 is connected to the quartz tube 2, and the other end is connected to the flow path connector. A light window housing 13 is mounted on the adapter plate 10. The light window housing 13 is made of corrosion-resistant metal such as aluminum alloy. The light window housing 13 has a light source hole for light to pass through, and a sensor hole for receiving light is also provided corresponding to the light source hole. A first sensor 41 is mounted on the other side of the light window housing 13 to measure the intensity change of light after passing through the reaction liquid and convert it into an electrical signal, which is then sent to the data terminal for data transmission with the outside via the aviation connector 14 at the bottom of the device. A second sensor 42 is located directly below the first sensor 41 to determine the amount of sample liquid and reagent in the quartz tube 2 by detecting the change in the amount of light source. The first sensor 41 and the second sensor 42 are photoelectric detectors that can convert light signals into electrical signals. A sensor cover plate 43 is provided behind the first sensor 41 and the second sensor 42 to prevent contaminants from affecting the sensor performance. Corresponding to the first sensor 41 and the second sensor 42, the light source is divided into a first light source 31 and a second light source 32. An indicator light 15 is installed on the front of the device to display the device's operating status. The operator can also observe the reaction liquid in the cuvette 8 through the observation hole on the light window housing 1.

[0017] Before starting the test, connect the sample liquid connector 51, reagent connector 52, and waste liquid connector 53 to the sample liquid bottle, reagent bottle, and waste liquid bottle respectively using flexible tubes. First, draw the reagent. Pump 1 starts working in the forward direction. The reagent solenoid valve connected to the reagent flow channel 62 opens, while the other solenoid valves close. The reagent is drawn and enters the quartz tube storing the reagent through reagent connector 52, flexible tube, and reagent flow channel 62. The second sensor 42 detects the change in the second light source 32 and quantifies the reagent volume. After reaching the target value, pump 1 and the reagent solenoid valve close.

[0018] The second step is to extract the sample solution. The pump operates in the forward direction, the sample solution solenoid valve connected to the sample solution flow channel 61 is opened, and the other solenoid valves are closed, and the sample solution is extracted. The sample solution enters the quartz tube storing the sample solution through the sample solution connector 51, the hose, and the sample solution flow channel 61. The second sensor 42 detects the change in the second light source 32 and quantifies the reagent volume. After the target value is reached, the pump 1 and the sample solution solenoid valve are closed.

[0019] In the third step, pump 1 operates in the forward direction, the gas path solenoid valve connected to the gas path flow channel 64 opens, and the other solenoid valves close. The sample liquid and reagent in the quartz tube 2 are drawn in together. The sample liquid and reagent enter the cuvette 8 through the second flow channel 12 of the adapter plate 10, the flow path connector, the hose, pump 1, the flow path connector, and the first flow channel 11. After all the liquid is drawn into the cuvette 8, pump 1 continues to draw in air, and the liquid in the cuvette 8 will continuously bubble, achieving a uniform mixing effect. Then pump 1 and the solenoid valve stop working, the first light source 31 is turned on, and the light passes through the liquid in the cuvette 8 to the first sensor 41. The first sensor 41 receives the signal and transmits it to the data terminal for analysis and data recording.

[0020] Fourth step: When the measurement process is over, pump 1 reverses its operation, the waste liquid solenoid valve connected to waste liquid channel 63 opens, and the other solenoid valves close. The liquid in cuvette 8 is drawn out together. The liquid enters the quartz tube 2 through the first channel 11 of the adapter plate 10, the flow path connector, the pump, the hose, the flow path connector, and the second channel 12. Then it flows through the reagent channel 61 and the upper half of the sample liquid channel 62 to the waste liquid channel 63. Finally, it is discharged into the waste liquid bottle through the hose and the waste liquid connector 53. Pump 1 and the solenoid valve are both closed.

[0021] This testing device reduces the number of components used by the equipment through process and flow channel design, improving the overall operating cycle and reducing the risk of failure while lowering testing cycle, manufacturing, and maintenance costs. Utilizing chip-based experimental technology, it features stable pipeline flow rates, consistent test data, fast response, and accurate measurements, enabling remote calibration / verification. The reaction solution is self-discharging, featuring a self-cleaning process, and the optimized protective structure further reduces maintenance costs.

Claims

1. A device for detecting the concentration of pollutants in water, comprising a pump (1) for providing power, characterized in that, It also includes a quartz tube (2) for storing sample solution and reagent respectively, a light source (3) for signal detection, and a first sensor (41) for measuring the intensity change of light after passing through the reaction liquid and converting it into an electrical signal to be sent to the data terminal. The sample solution and reagent enter the corresponding flow channel (6) through the corresponding connector (5) and flow into the corresponding quartz tube (2). The opening and closing of the flow channel (6) is controlled by the corresponding solenoid valve (7). The liquid in the quartz tube (2) is drawn together into the cuvette (8) for chemical reaction.

2. The device for detecting pollutant concentration in water according to claim 1, characterized in that, The connector (5) is connected to the sample bottle, the medicine bottle and the waste bottle respectively through a hose. The connector (5) includes a sample connector (51), a medicine connector (52), a waste liquid connector (53) and an air passage connector (54) for drawing air.

3. The device for detecting pollutant concentration in water according to claim 1, characterized in that, The flow channel (6) includes a sample liquid flow channel (61), a reagent flow channel (62), a waste liquid flow channel (63), and a gas flow channel (64).

4. The device for detecting pollutant concentration in water according to claim 1, characterized in that, The solenoid valve (7) includes a sample liquid solenoid valve for controlling the opening and closing of the sample liquid flow channel (61), a drug solenoid valve for controlling the opening and closing of the drug flow channel (62), a waste liquid solenoid valve for controlling the opening and closing of the waste liquid flow channel (63), and a gas path solenoid valve for controlling the opening and closing of the gas path flow channel (64).

5. The apparatus for detecting pollutant concentrations in water according to claim 1, characterized in that, The pump (1) can work in reverse, the waste liquid solenoid valve (73) is opened, and the reaction liquid in the cuvette (8) is drawn out along the waste liquid flow channel (63) and discharged from the waste liquid connector (53).

6. The apparatus for detecting pollutant concentrations in water according to claim 1, characterized in that, It also includes a second sensor (42) that quantifies the volume of sample liquid and reagent in quartz tube (2) by detecting changes in the light source.

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