Water quality on-line analyzer

Abstract

This utility model discloses an online water quality analyzer, comprising: a multi-channel selector valve assembly, a gas source interface, and several liquid bottles; a water droplet counting sensor located between the outlet of the outlet pipe and the mixing cup; a digestion tank assembly connected to the mixing cup via a transmission pipe, on which a first three-way valve is installed; a negative pressure pump connected to the multi-channel selector valve assembly, with a multi-way valve installed on the side opposite to the first three-way valve and the digestion tank assembly, the multi-way valve including an inlet connected to the first three-way valve and an outlet for draining liquid; a buffer tank located between the multi-channel selector valve assembly and the digestion tank assembly, with a first two-way valve between the buffer tank and the digestion tank assembly, and a second two-way valve between the digestion tank assembly and the first three-way valve. This utility model can prevent reagents from entering subsequent components, improving safety, and can also use more clean water than the digestion tank volume to clean the digestion tank, reducing the influence of previous liquid residue on the measured values ​​and improving the stability and accuracy of the detection data.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, and in particular to an online water quality analyzer. Background Technology

[0002] With increasing public awareness of environmental protection, the discharge and purification of industrial and agricultural wastewater and domestic water require extensive monitoring of indicators such as pH, COD, conductivity, ammonia nitrogen, and heavy metal ions to effectively treat and control pollutant concentrations. The demand for efficient and accurate water quality testing and liquid testing in production is continuously increasing. Currently, most instruments on the market combine peristaltic pumps and syringe pumps, metering tubes, level sensors, and multi-way valve control systems. These systems are slow, consume large amounts of reagents, are costly, prone to failure, have short lifespans for core components, and the stability and accuracy of test data deteriorate over time. Summary of the Invention

[0003] The purpose of this invention is to provide an online water quality analyzer. This online water quality analyzer has high quantitative accuracy and maintains stable quantitative accuracy after long-term repeated use. At the same time, it can prevent reagents from entering subsequent components, thus improving safety. It can also use more clean water than the digestion tank volume to clean the digestion tank, reducing the impact of liquid residue from the previous test on the measured values, and further improving the accuracy of the test data.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: an online water quality analyzer, comprising: a multi-channel selector valve group, an air source interface and several liquid bottles, wherein the air inlet of the multi-channel selector valve group is connected to the air source interface through an air inlet pipe, and several air inlets of the multi-channel selector valve group are respectively sealed to the corresponding liquid bottles through several air pipes.

[0005] Several outlet tubes each have their own inlet embedded in the corresponding liquid bottle, and the outlet of the outlet tube is located above the mixing cup;

[0006] A water droplet counting sensor is located between the liquid outlet of the liquid outlet tube and the mixing cup;

[0007] The air inlet connecting the air tube to the liquid bottle is located above the liquid surface inside the liquid bottle, and the liquid inlet of the liquid outlet tube is located below the liquid surface inside the liquid bottle.

[0008] The digestion tank assembly is connected to the mixing cup via a transfer pipe, on which a first three-way valve is installed;

[0009] A negative pressure pump is connected to the multi-channel selector valve group. A multi-channel valve is installed on the side of the first three-way valve opposite to the digestion tank assembly. This multi-channel valve includes an inlet connected to the first three-way valve and an outlet for draining liquid.

[0010] A buffer tank is located between the multi-channel selector valve group and the digestion tank assembly. A first two-way valve is provided between the buffer tank and the digestion tank assembly, and a second two-way valve is provided between the digestion tank assembly and the first three-way valve.

[0011] The following are further improvements to the above technical solution:

[0012] 1. In the above scheme, a speed regulating valve is also provided between the buffer pool and the multi-channel selection valve group.

[0013] 2. In the above scheme, the speed regulating valve is connected in parallel with a one-way valve that can be directed to one side of the buffer pool by a multi-channel selector valve group.

[0014] 3. The above solution also includes a gas cylinder, which is connected to the gas source interface.

[0015] 4. The above solution also includes an air pump, which is connected to the gas cylinder.

[0016] 5. In the above scheme, a pressure regulating part is provided between the multi-channel selector valve group and the air source interface.

[0017] 6. In the above scheme, the mixing cup is located above the liquid bottle.

[0018] 7. In the above scheme, the outlet of the multi-way valve further includes a first outlet for discharging the detection liquid and a second outlet for discharging the cleaning liquid.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] 1. This utility model of an online water quality analyzer comprises a multi-channel selector valve assembly with several air inlets connected to corresponding liquid bottles via several air tubes; several outlet tubes each have their inlets embedded in their respective liquid bottles, with the outlet of the outlet tube located above the mixing cup; a droplet counting sensor is located between the outlet of the outlet tube and the mixing cup; the air inlet connecting the air tube to the liquid bottle is located above the liquid surface in the liquid bottle, and the inlet of the outlet tube is located below the liquid surface in the liquid bottle. This design ensures high quantitative accuracy, and the quantitative accuracy remains stable even after long-term repeated use, guaranteeing stable detection performance and avoiding contamination of the liquid in the bottle. To mitigate liquid crosstalk interference, a buffer tank is also included between the multi-channel selection valve assembly and the digestion tank assembly. This buffer tank reduces the size of the digestion tank assembly, lowers costs, and decreases reagent consumption. It also prevents reagents from entering subsequent components, improving safety, and allows for rinsing the digestion tank with more water than the digestion tank's volume, reducing the impact of residual liquid from the previous test on the measured values ​​and further improving the accuracy of the detection data. Furthermore, a first two-way valve is installed between the buffer tank and the digestion tank assembly, and a second two-way valve is installed between the digestion tank assembly and the first three-way valve. During detection, the digestion tank assembly is sealed, providing a stable detection environment and improving the reliability of the detection.

[0021] 2. The water quality online analyzer of this utility model is further equipped with a speed regulating valve between its buffer tank and the multi-channel selection valve group. It can dynamically adjust the force of the mixing cup to draw liquid from the digestion tank component according to the liquid volume in the mixing cup, avoiding both excessive and insufficient suction, which would result in slow liquid extraction and residue. Furthermore, the speed regulating valve is connected in parallel with a one-way valve that allows the liquid to flow from the multi-channel selection valve group to the buffer tank side, which enables greater impact force during drainage and cleaning, greatly reducing the amount of residue and reducing interference between different batches of samples. Attached Figure Description

[0022] Appendix Figure 1 This is a schematic diagram of the structure of the online water quality analyzer of Embodiment 1 of this utility model;

[0023] Appendix Figure 2 This is a schematic diagram of the structure of the online water quality analyzer in Embodiment 2 of this utility model.

[0024] In the attached diagrams: 1. Multi-channel selector valve assembly; 2. Gas source interface; 3. Liquid bottle; 31. Reagent bottle; 32. Cleaning solution bottle; 33. Clean water bottle; 4. Gas tubing; 5. Liquid outlet pipe; 6. Mixing cup; 7. Water droplet counting sensor; 8. Digestion tank assembly; 9. Transfer pipe; 10. First three-way valve; 11. Multi-way valve; 12. Air pump; 13. Air pressure regulating unit; 14. Negative pressure pump; 15. Buffer tank; 161. First two-way valve; 162. Second two-way valve; 17. Speed ​​control valve; 18. Check valve; 19. Gas cylinder. Detailed Implementation

[0025] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0026] Example 1: An online water quality analyzer, as shown in the attached document. Figure 1 As shown, it includes: a multi-channel selector valve group 1, an air source interface 2, and several liquid bottles 3. The air inlet of the multi-channel selector valve group 1 is connected to the air source interface 2 through an air inlet pipe, and several air inlets of the multi-channel selector valve group 1 are respectively sealed to the corresponding liquid bottles 3 through several air pipes 4.

[0027] Several liquid outlet pipes 5 each have their own inlet embedded in the corresponding liquid bottle 3, and the outlet of the liquid outlet pipe 5 is located above the mixing cup 6;

[0028] The water droplet counting sensor 7 is located between the outlet of the liquid outlet pipe 5 and the mixing cup 6;

[0029] The air inlet of the air tube 4, which connects to the liquid bottle 3, is located above the liquid surface inside the liquid bottle 3, while the inlet of the liquid outlet tube 5 is located below the liquid surface inside the liquid bottle 3.

[0030] Digestion tank assembly 8 is connected to mixing cup 6 via a transfer pipe 9, on which a first three-way valve 10 is installed;

[0031] A negative pressure pump 14 is connected to the multi-channel selector valve group 1. A multi-way valve 11 is installed on the side of the first three-way valve 10 opposite to the digestion tank assembly 8. This multi-way valve 11 includes an inlet connected to the first three-way valve 10 and an outlet for draining liquid. The negative pressure pump quickly draws the liquid in the mixing cup into the digestion tank assembly, which improves efficiency and can also provide kinetic bubbles to accelerate the mixing or reaction speed, further shortening the detection cycle.

[0032] The air pressure of each air tube 4 is controlled by a multi-channel selection valve group to blow air into the liquid bottle. The liquid does not need to pass through the valve, and the liquid is accurately and quantitatively fed into the mixing cup 6. The liquid does not need to pass through the valve and the number of pipes through which the liquid passes is reduced. The droplet counting sensor accurately calculates the number of droplets, with high quantitative accuracy. The quantitative accuracy remains stable after long-term repeated use. It also avoids contamination of the liquid in the liquid bottle, has no liquid cross-contamination interference, does not require cleaning, has low cost and low failure rate, and improves sampling speed.

[0033] A buffer tank 15 is located between the multi-channel selector valve group 1 and the digestion tank assembly 8. The buffer tank reduces the size of the digestion tank assembly, lowers costs, and reduces reagent consumption. At the same time, it can prevent reagents from entering subsequent components. That is, if the pumping force is too large, the buffer tank 15 can store reagents to improve safety. It can also be used to clean the digestion tank assembly 8 with more clean water than the digestion tank, reducing the impact of the previous liquid residue on the measured value and further improving the stability and accuracy of the test data.

[0034] A first two-way valve 161 is provided between the buffer pool 15 and the digestion pool assembly 8, and a second two-way valve 162 is provided between the digestion pool assembly 8 and the first three-way valve 10. During testing, the digestion pool assembly is closed to provide a stable testing environment, which helps to improve the reliability of the test.

[0035] It also includes a gas cylinder 19, which is connected to the gas source interface 2.

[0036] It also includes an air pump 19, which is connected to the gas cylinder 19.

[0037] A pressure regulating section is provided between the multi-channel selector valve group 1 and the air source interface 2.

[0038] The aforementioned mixing cup 6 is located above the liquid bottle 3.

[0039] The outlet of the aforementioned multi-way valve 11 further includes a first outlet for discharging the test liquid and a second outlet for discharging the cleaning liquid.

[0040] Example 2: An online water quality analyzer, as shown in the attached document. Figure 2 As shown, it includes: a multi-channel selector valve group 1, an air source interface 2, and several liquid bottles 3. The air inlet of the multi-channel selector valve group 1 is connected to the air source interface 2 through an air inlet pipe, and several air inlets of the multi-channel selector valve group 1 are respectively sealed to the corresponding liquid bottles 3 through several air pipes 4.

[0041] Several liquid outlet pipes 5 each have their own inlet embedded in the corresponding liquid bottle 3, and the outlet of the liquid outlet pipe 5 is located above the mixing cup 6;

[0042] The water droplet counting sensor 7 is located between the outlet of the liquid outlet pipe 5 and the mixing cup 6;

[0043] The air inlet of the air tube 4, which connects to the liquid bottle 3, is located above the liquid surface inside the liquid bottle 3, while the inlet of the liquid outlet tube 5 is located below the liquid surface inside the liquid bottle 3.

[0044] Digestion tank assembly 8 is connected to mixing cup 6 via a transfer pipe 9, on which a first three-way valve 10 is installed;

[0045] A negative pressure pump 14 is connected to the multi-channel selector valve group 1. A multi-way valve 11 is installed on the side of the first three-way valve 10 opposite to the digestion tank assembly 8. This multi-way valve 11 includes an inlet connected to the first three-way valve 10 and an outlet for draining liquid. The negative pressure pump quickly draws the liquid in the mixing cup into the digestion tank assembly, which improves efficiency and can also provide kinetic bubbles to accelerate the mixing or reaction speed, further shortening the detection cycle.

[0046] The air pressure of each air tube 4 is controlled by a multi-channel selection valve group to blow air into the liquid bottle. The liquid does not need to pass through the valve, and the liquid is accurately and quantitatively fed into the mixing cup 6. The liquid does not need to pass through the valve and the number of pipes through which the liquid passes is reduced. The water droplet counting sensor accurately calculates the number of droplets, with high quantitative accuracy. The quantitative accuracy remains stable after long-term repeated use, which ensures the stability of detection performance and avoids contamination of the liquid in the liquid bottle. There is no liquid cross-contamination interference, no cleaning is required, the cost is low, the failure rate is low, and the sampling speed is improved.

[0047] A buffer tank 15 is located between the multi-channel selector valve group 1 and the digestion tank assembly 8. The buffer tank reduces the size of the digestion tank assembly, lowers costs, and reduces reagent consumption. At the same time, it can prevent reagents from entering subsequent components. That is, if the pumping force is too large, the buffer tank 15 can store reagents to improve safety. It can also be used to clean the digestion tank assembly 8 with more clean water than the digestion tank, reducing the impact of the previous liquid residue on the measured value and further improving the stability and accuracy of the test data.

[0048] A first two-way valve 161 is provided between the buffer pool 15 and the digestion pool assembly 8, and a second two-way valve 162 is provided between the digestion pool assembly 8 and the first three-way valve 10; the digestion pool assembly 8 is closed during testing, providing a stable testing environment, which is beneficial to improving the reliability of the test.

[0049] A speed regulating valve 17 is also provided between the buffer tank 15 and the multi-channel selection valve group 1. It can dynamically adjust the force of the mixing cup to draw liquid from the digestion tank component according to the amount of liquid in the mixing cup, so as to avoid both excessive suction force and insufficient suction force, which would result in slow liquid extraction and residue.

[0050] The aforementioned speed control valve is connected in parallel to a one-way valve 18 that allows flow from the multi-channel selector valve group 1 to one side of the buffer tank 15, which enables greater impact force during drainage and cleaning, greatly reducing the amount of residue and reducing interference between different batches of tests.

[0051] It also includes a gas cylinder 19, which is connected to the gas source interface 2.

[0052] It also includes an air pump 19, which is connected to the gas cylinder 19.

[0053] A pressure regulating section is provided between the multi-channel selector valve group 1 and the air source interface 2.

[0054] The aforementioned mixing cup 6 is located above the liquid bottle 3.

[0055] The outlet of the aforementioned multi-way valve 11 further includes a first outlet for discharging the test liquid and a second outlet for discharging the cleaning liquid.

[0056] When using the above-mentioned online water quality analyzer, the size of the digestion tank assembly is reduced by using a buffer tank, which lowers costs and reduces reagent consumption. This not only prevents reagents from entering subsequent components and improves safety, but also allows for the use of more clean water than the digestion tank volume to clean the digestion tank, reducing the impact of previous liquid residues on the measured values ​​and improving the stability and accuracy of the test data. Furthermore, a first two-way valve 161 is installed between the buffer tank 15 and the digestion tank assembly 8, and a second two-way valve 162 is installed between the digestion tank assembly 8 and the first three-way valve 10. During testing, the digestion tank assembly 8 is closed to provide a stable testing environment, which helps to improve the reliability of the test.

[0057] Furthermore, a speed regulating valve is installed between the buffer tank and the multi-channel selection valve group; it can dynamically adjust the force of the mixing cup to draw liquid from the digestion tank component according to the liquid volume in the mixing cup, avoiding both excessive and insufficient suction, which would result in slow liquid extraction and residue. In addition, the speed regulating valve is connected in parallel to a one-way valve that allows the liquid to flow from the multi-channel selection valve group to the buffer tank side, which enables a greater impact force during liquid discharge, greatly reducing the amount of residue and reducing interference between different batches of tests.

[0058] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An online water quality analyzer, characterized in that: include: The multi-channel selector valve group (1), the gas source interface (2) and several liquid bottles (3) are provided. The air inlet of the multi-channel selector valve group (1) is connected to the gas source interface (2) through the air inlet pipe. Several air inlets of the multi-channel selector valve group (1) are respectively sealed to the corresponding liquid bottles (3) through several air pipes (4). Several liquid outlet tubes (5) have their respective inlets embedded in the corresponding liquid bottles (3), and the outlets of the liquid outlet tubes (5) are located above the mixing cup (6); A water droplet counting sensor (7) is located between the outlet of the liquid outlet pipe (5) and the mixing cup (6); The air inlet of the air tube (4) connected to the liquid bottle (3) is located above the liquid surface inside the liquid bottle (3), and the inlet of the liquid outlet tube (5) is located below the liquid surface inside the liquid bottle (3). The digestion tank assembly (8) is connected to the mixing cup (6) via a transfer pipe (9), on which a first three-way valve (10) is installed. A negative pressure pump (14) is connected to the multi-channel selector valve group (1), and a multi-way valve (11) is installed on the side of the first three-way valve (10) opposite to the digestion tank assembly (8). The multi-way valve (11) includes an inlet connected to the first three-way valve (10) and an outlet for draining liquid. A buffer pool (15) is located between the multi-channel selector valve group (1) and the digestion pool assembly (8). A first two-way valve (161) is provided between the buffer pool (15) and the digestion pool assembly (8), and a second two-way valve (162) is provided between the digestion pool assembly (8) and the first three-way valve (10).

2. The online water quality analyzer according to claim 1, characterized in that: A speed regulating valve (17) is also provided between the buffer pool (15) and the multi-channel selection valve group (1).

3. The online water quality analyzer according to claim 2, characterized in that: The speed control valve is connected in parallel to a one-way valve (18) that can be directed from the multi-channel selector valve group (1) to the buffer pool (15).

4. The online water quality analyzer according to claim 1, characterized in that: It also includes a gas cylinder (19) which is connected to the gas source interface (2).

5. The online water quality analyzer according to claim 4, characterized in that: It also includes an air pump (12) connected to the gas cylinder (19).

6. The online water quality analyzer according to claim 1, characterized in that: A pressure regulating section is provided between the multi-channel selector valve group (1) and the air source interface (2).

7. The online water quality analyzer according to claim 1, characterized in that: The mixing cup (6) is located above the liquid bottle (3).

8. The online water quality analyzer according to claim 1, characterized in that: The outlet of the multi-way valve (11) further includes a first outlet for draining the test liquid and a second outlet for draining the cleaning liquid.

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