Laboratory testing device for online disinfectant sensor

Abstract

A laboratory testing device for an online disinfectant sensor comprises a PC end, a sampling testing mechanism, a first solution barrel, a second solution barrel and a recycling barrel, the sampling testing mechanism is connected with the PC end, one end of the sampling testing mechanism is connected with the first solution barrel and the second solution barrel, and the other end of the sampling testing mechanism is connected with the recycling barrel; wherein the sampling testing mechanism comprises a first peristaltic pump, a second peristaltic pump, a damper, a measuring tank and a residual chlorine sensor. Compared with the prior art, needed materials are convenient and easy to obtain, operation is easy and feasible, installation is convenient and fast, the stability of liquid to be measured can be guaranteed, and when low concentration is measured, indexes such as indication error and stability all meet product requirements.

Description

Technical Field

[0001] The utility model relates to the field of disinfectant detection, in particular to a laboratory test device for an online disinfectant sensor. Background Art

[0002] Online disinfectant (total chlorine / residual chlorine / chlorine dioxide) sensors have been widely used in online monitoring of tap water, hospital wastewater, etc. However, when conducting relevant tests such as sensor development and application experiments in the laboratory, due to the influence of laboratory conditions, it is not possible to well simulate on-site measurement. The specific problems are as follows: The above-mentioned traditional disinfectant sensors are all in an online continuous working scenario. In the laboratory, the flow method is usually selected to simulate on-site test conditions in order to test various performance aspects of the sensor. However, some test problems are likely to be encountered during actual use, such as: the stability of the solution, pulse interference, and the influence of pipeline bubbles.

[0003] To solve the above problems, a series of improvements have been made. Content of the Utility Model

[0004] The purpose of the utility model is to provide a laboratory test device for an online disinfectant sensor to overcome the above-mentioned disadvantages and deficiencies existing in the prior art.

[0005] A laboratory test device for an online disinfectant sensor includes: a PC computer terminal, a sampling and testing mechanism, a first solution barrel, a second solution barrel, and a recovery barrel. The sampling and testing mechanism is connected to the PC computer terminal. One end of the sampling and testing mechanism is connected to the first solution barrel and the second solution barrel, and the other end of the sampling and testing mechanism is connected to the recovery barrel.

[0006] Among them, the sampling and testing mechanism includes: a first peristaltic pump, a second peristaltic pump, a damper, a measurement tank, and a residual chlorine sensor. One end of the first peristaltic pump is connected to the first solution barrel, and the other end of the first peristaltic pump is connected to the second solution barrel. One end of the second peristaltic pump is connected to the second solution barrel, and the other end of the second peristaltic pump is connected to the damper. The other end of the damper is connected to the measurement tank. The other end of the measurement tank is connected to the recovery barrel. The residual chlorine sensor is arranged inside the measurement tank, and the upper part of the measurement tank is inclined.

[0007] Advantages of the Utility Model

[0008] Compared with the traditional technology, the materials required by the utility model are easy to obtain, the operation is simple and feasible, the installation is convenient, the stability of the liquid to be measured can be ensured, and when measuring a lower concentration, indicators such as indication error and stability meet the product requirements. Description of the Drawings

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] Reference numerals:

[0011] PC computer terminal 100, sampling and testing mechanism 200, first peristaltic pump 210, second peristaltic pump 220, damper 230, measuring tank 240, and residual chlorine sensor 250.

[0012] First solution barrel 300, second solution barrel 400, and recovery barrel 500. Detailed implementation manners

[0013] The following further describes the present utility model in conjunction with specific embodiments. It should be understood that the following embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model.

[0014] Embodiment 1

[0015] Figure 1 It is a structural schematic diagram of the present utility model.

[0016] As Figure 1 shown, a laboratory test device for an online disinfectant sensor includes: a PC computer terminal 100, a sampling and testing mechanism 200, a first solution barrel 300, a second solution barrel 400, and a recovery barrel 500. The sampling and testing mechanism 200 is connected to the PC computer terminal 100. One end of the sampling and testing mechanism 200 is connected to the first solution barrel 300 and the second solution barrel 400, and the other end of the sampling and testing mechanism 200 is connected to the recovery barrel 500;

[0017] Among them, the sampling and testing mechanism 200 includes: a first peristaltic pump 210, a second peristaltic pump 220, a damper 230, a measuring tank 240, and a residual chlorine sensor 250. One end of the first peristaltic pump 210 is connected to the first solution barrel 300, and the other end of the first peristaltic pump 210 is connected to the second solution barrel 400. One end of the second peristaltic pump 220 is connected to the second solution barrel 400, and the other end of the second peristaltic pump 220 is connected to the damper 230. The other end of the damper 230 is connected to the measuring tank 240, the other end of the measuring tank 240 is connected to the recovery barrel 500, the residual chlorine sensor 250 is arranged inside the measuring tank 240, and the upper part of the measuring tank 240 is inclined.

[0018] The innovation points of the present utility model are reflected in that when in use, the first peristaltic pump 210 is controlled by a PC computer terminal 100 to regularly pump the solution in the first solution barrel 300 into the second solution barrel 400, and then the second peristaltic pump 220 is controlled to extract the solution sample in the second solution barrel 400. The sample flows from the second solution barrel 400 through the damper 230 into the measurement tank 240 by means of a closed pipeline flow method. Compared with the current method of stirring in the open in the laboratory during measurement, it can break through the limitations of the existing device and greatly improve the stability of the solution to be measured. Secondly, the damper 230 can eliminate the influence of pulses in the pipeline on the measurement. After the sample in the measurement tank 240 is tested by the residual chlorine sensor 250, the finally generated waste liquid is directly discharged into the recovery barrel 500. The pipeline is designed according to the principle of disposable use to ensure that the solution to be measured entering the measurement tank is fresh, and reduce the influence caused by the self-change of the solution to be measured.

[0019] The working principle of the present utility model:

[0020] Solution stability problem: The test solution used in traditional disinfectant sensors has poor stability, is generally volatile, and will slowly decrease with use; and the influence of light causes some photolysis and a decrease in concentration. Therefore, during the test process, when traditional equipment is used, the experimenter will manually replace the solution regularly to ensure the stability of the test. The present utility model adds the first peristaltic pump 210 and the second peristaltic pump 220, and sets the automatic liquid change time by setting the flow rate of the peristaltic pump and the test cycle to achieve the purpose of regular liquid change, thereby avoiding the problem of reduced solution volatilization caused by frequently opening the sealed barrel in the traditional technology.

[0021] Pulse interference: If a peristaltic pump structure is used for solution pumping, new problems will also arise. There are some pulse effects when the peristaltic pump is working, which will cause fluctuations in the test data and abnormal readings. Therefore, we design and install a damper 230 in the pipeline, which can effectively reduce the pulse influence and stabilize the readings.

[0022] Air bubbles in the pipeline: The existence of air bubbles in the pipeline will cause abnormal measurement data, especially when air bubbles accumulate at the measurement end face of the sensor. There are many reasons for the generation of air bubbles, such as temperature difference, air dissolved in the solution, pipeline air leakage, etc. Traditional laboratories can solve the temperature difference problem by constant temperature and also confirm whether the pipeline is airtight through airtightness inspection. However, the precipitation of air dissolved in the solution to form air bubbles has a certain degree of uncontrollability. Therefore, the present utility model has a special structural design for the measurement tank. The cavity of the measurement tank of traditional sensors is vertical, and the electrodes are also vertically installed. We design the cavity of the measurement tank 240 to be inclined. In this way, the method of installing the electrodes obliquely is more likely to defoam than the vertical installation within a test cycle, mainly because the oblique installation is more conducive to the removal of air bubbles.

[0023] Compared with the traditional technology, the materials required by the utility model are easily available, the operation is simple and feasible, the installation is convenient, the stability of the liquid to be measured can be ensured, and when measuring a lower concentration, indicators such as indication error and stability meet the product requirements.

[0024] The specific implementation manners of the utility model are described above, but the utility model is not limited thereto. As long as the gist of the utility model is not departed from, the utility model can have various changes.

Claims

1. A laboratory test device for an online disinfectant sensor, characterized in that: include: A PC terminal (100), a sampling and testing mechanism (200), a first solution barrel (300), a second solution barrel (400) and a recovery barrel (500), wherein the sampling and testing mechanism (200) is connected to the PC terminal (100), one end of the sampling and testing mechanism (200) is connected to the first solution barrel (300) and the second solution barrel (400), and the other end of the sampling and testing mechanism (200) is connected to the recovery barrel (500); The sampling and testing mechanism (200) comprises: a first peristaltic pump (210), a second peristaltic pump (220), a damper (230), a measuring tank (240) and a residual chlorine sensor (250); one end of the first peristaltic pump (210) is connected to the first solution barrel (300); the other end of the first peristaltic pump (210) is connected to the second solution barrel (400); one end of the second peristaltic pump (220) is connected to the second solution barrel (400); the other end of the second peristaltic pump (220) is connected to the damper (230); the other end of the damper (230) is connected to the measuring tank (240); the other end of the measuring tank (240) is connected to the recovery tank (500); the residual chlorine sensor (250) is arranged inside the measuring tank (240); and the upper part of the measuring tank (240) is inclined.

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