Steady-flow bubble-removing type automatic-cleaning multifunctional disinfectant measuring sensor

Abstract

The utility model relates to the technical field of water quality analyzers, and discloses a steady-flow bubble-eliminating type automatic-cleaning multifunctional disinfectant measuring sensor which comprises a flow cell, a guide-in pipe and an overflow pipe are arranged in the flow cell, after a water sample flows into the flow cell, the water sample enters a detection chamber through the guide-in pipe, the water sample is subjected to flow stabilization in the process, and then the water sample enters the detection chamber through the overflow pipe. A water sample enters the detection chamber to be measured and then flows out of the equipment, a working electrode and a counter electrode of a disinfectant, a reference electrode and a flow and temperature integrated sensor are arranged in the detection chamber, mechanical rotors are arranged on the working electrode and the counter electrode of the disinfectant, and the mechanical rotors are driven to rotate by water flow flowing into the detection chamber after the water sample flows into the flow cell; the surface of the working electrode and the surface of the counter electrode are cleaned, bubbles on the surfaces of the working electrode and the counter electrode are eliminated, residual chlorine, chlorine dioxide and ozone of a disinfectant can be continuously and stably detected, cleaning of the measuring electrode is guaranteed through continuous cleaning of the mechanical rotor, bubble interference is eliminated, and long-acting low maintenance is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality analyzers, in particular to a steady-flow bubble-eliminating automatic-cleaning multifunctional disinfectant measuring sensor. Background Art

[0002] In the production process of tap water, disinfectants are added to kill harmful microorganisms in the water to ensure the safety of the water quality. In water purification, there are different disinfection methods such as residual chlorine, chlorine dioxide, ozone, etc. The main purpose of disinfectant testing is to ensure that the quality of tap water meets the sanitary standards for drinking water. It is of great significance and value.

[0003] There are many methods for measuring water disinfectants. Taking residual chlorine as an example, electrochemical sensors have become the mainstream technology for residual chlorine measurement due to their fast measurement speed and reagent-free operation. The constant voltage three-electrode measurement system, designed with a measuring electrode and a reference electrode, and equipped with integrated flow and temperature sensor compensation and pH compensation algorithms, offers high precision and strong stability in residual chlorine measurement, making it ideal for use in urban and rural water plants.

[0004] Currently, most of the constant voltage residual chlorine electrodes on the market are bare double-ring platinum electrodes installed in a circulation trough. The circulation trough is not designed with a flow stabilization, voltage stabilization and diversion design, and the platinum electrode is not designed with any cleaning design. During the residual chlorine measurement process, the electrode easily adsorbs positively charged ions Ca²⁺ on the platinum surface during the ion exchange reaction, forming a layer of scale, which affects the sensor's detection of residual chlorine content. The sensor needs to be cleaned or replaced, which greatly increases the maintenance cost in the case of large-scale water quality testing in water plants. At the same time, the sensor is easily affected by fluctuations in water pressure and flow, resulting in detection errors. Utility Model Content

[0005] (1) Technical Problem Solved: To address the shortcomings of existing technologies, this utility model provides a multifunctional disinfectant measurement sensor with a steady flow and bubble elimination mechanism, which offers the advantage of self-cleaning and solves the problem of residual stains on the sensor. This sensor features steady flow and bubble elimination functions, along with a flow, temperature, and pH compensation algorithm, addressing the issue of data drift in constant voltage residual chlorine measurements. The sensor's separate reference electrode eliminates maintenance consumables requiring only replacement of the reference electrode, eliminating the high cost of replacing the entire measurement system.

[0006] (2) Technical solution: In order to achieve the above-mentioned purpose of steady flow and self-cleaning, the present invention provides the following technical solution: a steady flow and bubble elimination type automatic cleaning multifunctional disinfectant measuring sensor, including a circulation pool, a disinfectant measuring electrode and a counter electrode, a reference electrode, a pH electrode, and a flow and temperature integrated sensor, with connecting ends connected to the circulation pool and the detection end respectively. An inlet pipe and an overflow pipe are provided in the circulation pool. After the water sample flows into the circulation pool, the water sample enters the detection chamber through the inlet pipe. This process stabilizes the flow of the water sample. The water sample enters the detection chamber for measurement and then flows out of the equipment. Excess water sample is discharged from the overflow pipe. The detection chamber is equipped with a working electrode and counter electrode of the disinfectant, a reference electrode, and an integrated flow and temperature sensor. The water sample entering the detection chamber is measured by the three-electrode constant potential method principle, and a mechanical rotor is installed on the working electrode and counter electrode of the disinfectant. When the water sample flows into the circulation pool and then flows into the detection chamber through the inlet pipe, the mechanical rotor is driven by the water flow to rotate, clean the surface of the working electrode and the counter electrode and eliminate bubbles on the surface, so that it can continuously and stably detect the disinfectant residual chlorine, chlorine dioxide, and ozone, and achieve long-term and low maintenance.

[0007] Preferably, an inlet pipe and an overflow pipe are provided in the circulation pool, and the overflow pipe is higher than the test pipe.

[0008] Preferably, the connection end is provided with a filter component, a flow regulating component and a sampling knob, the filter component can filter larger suspended particles in the solution, the flow regulating component can adjust the amount of water entering the circulation pool, and the sampling knob can sample the water in the circulation pool after being opened.

[0009] Preferably, a reference electrode is provided on the side of the detection end, and the solution in the introduction tube flows into the detection chamber and contacts the reference electrode at the same time, and the reference electrode is detachable and replaceable.

[0010] Preferably, the detection chamber is conical in shape as a whole.

[0011] Preferably, the circulation pool is provided with a pH electrode.

[0012] (III) Beneficial effects: Compared with the prior art, the present invention provides a steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor, which has the following beneficial effects:

[0013] This multifunctional disinfectant measurement sensor with steady flow and bubble elimination, featuring automatic cleaning, integrates filtration, sampling, steady flow, defoaming, and continuous, automatic mechanical cleaning. It uses a three-electrode constant potentiostat method to detect residual chlorine, chlorine dioxide, and ozone within the detection chamber. This electrochemical measurement utilizes membraneless electrodes. The system includes two platinum electrodes and a reference electrode. A voltage is applied between the measuring and counter electrodes, and the disinfectant in the solution generates a current proportional to the disinfectant concentration. Compared to traditional two-electrode systems, the three-electrode system significantly improves sensor stability. The system can monitor residual chlorine, chlorine dioxide, and ozone in the solution through software switching without replacing the sensor. The separate reference and measuring electrodes require only the reference electrode consumable to be replaced during operation, saving costs. The flow diversion design of the flow cell overflow pipe ensures constant water pressure and stable flow rate in the detection chamber, resulting in more stable measurements. The sensor features an integrated flow and temperature design, and a compensation algorithm for pH, flow, temperature, etc. is used during testing to further improve measurement accuracy. The system can monitor residual chlorine, chlorine dioxide, and ozone factors in the solution through software switching without replacing the sensor. The sensor uses a mechanical rotor to continuously clean the measuring electrode to ensure cleanliness and eliminate bubble interference, achieving long-term, low-maintenance performance.

[0014] 2. The steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor is equipped with mechanical rotors on the working electrode and counter electrode of the disinfectant. When the water sample flows into the circulation pool and then flows into the detection chamber through the inflow tube, the water flow drives the rotor to rotate, cleaning the surface of the working electrode and the counter electrode and eliminating bubbles on the surface, so that it can continuously and stably detect the residual chlorine, chlorine dioxide, and ozone of the disinfectant, achieving long-term and low-maintenance. In the three-electrode constant potential method, the working electrode is the electrode that is in direct contact with the solution to be tested, that is, the liquid containing the disinfectant, and the solution contains calcium, magnesium ions and other impurities. The water quality sensor After the instrument has been working for a long time, a layer of scale will form on the surface of the working electrode. Conventional water quality detection sensors need to be maintained and replaced after a certain period of use. This device can self-clean the working electrode through the rotation of the mechanical rotor. The instrument can achieve long-term low maintenance, and the mechanical rotor does not require an additional motor to rotate through the water flow, saving energy. It is suitable for high hardness, dechlorination, and water outage conditions, and makes the structure more compact, reduces the transmission of vibration, and makes the equipment connection more tight and reliable. The reference electrode and pH value detection components are detachable structures, and the overall equipment is scalable.

[0015] 3. The steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor uses a steady-flow device in the circulation pool to ensure that the water sample entering the detection chamber has a constant flow rate. An inlet pipe and an overflow pipe are provided in the circulation pool. The overflow pipe is higher than the test tube. When the flow rate of the external water sample is unstable, the excess water sample is discharged through the overflow pipe to ensure that the water sample with a constant flow enters the detection chamber through the guide pipe for measurement. The space inside the circulation pool is like a buffer, which can store a certain amount of water. When the external water supply flow changes, it has a certain buffering effect, ensuring that the water sample in the circulation pool is stable, reducing the water flow fluctuation in the inlet pipe, and ensuring that the flow rate of the water sample flowing into the detection chamber is constant. At the same time, the mechanical rotor is used in combination to eliminate the interference of bubbles. In the residual chlorine measurement, the pH, flow, temperature and other influencing factors are compensated by the algorithm to further improve the stability and accuracy of the measurement.

[0016] 4. The steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor separates the reference electrode, the disinfectant working electrode, and the counter electrode, avoiding the current method of replacing the entire electrode. Only the consumable reference electrode needs to be replaced, reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the circulation pool of the utility model.

[0020] In the figure: 1. circulation cell; 2. connection end; 3. detection end; 11. test tube; 12. pH detection component; 21. filter component; 22. sampling port; 31. detection chamber; 32. reference electrode; 311. mechanical rotor; 312. working electrode. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 3, a steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor, comprising a circulation pool 1, a disinfectant measuring electrode and a counter electrode 311, a reference electrode 32, a pH electrode 313, and a temperature-flow integrated sensor 33, with a connecting end 2 connected to the circulation pool 1 and the detection end 3 at both ends respectively, an inlet pipe 11 and an overflow pipe 12 are provided in the circulation pool 1, after the water sample flows into the circulation pool, the water sample reaches the detection chamber 31 in the detection end 3 through the inlet pipe and then flows out of the equipment, and the excess water sample is discharged from the overflow pipe, and the detection chamber is provided with a working electrode and a counter electrode 311, a reference electrode 32, and a flow-temperature integrated sensor 33 for the disinfectant, and the water sample entering the detection chamber is measured by the principle of three-electrode constant potential method, and a mechanical rotor 312 is installed on the working electrode and the counter electrode 311 of the disinfectant, and the mechanical rotor is driven by the water flow to rotate when the water sample flows into the detection chamber through the inlet pipe after flowing into the circulation pool, thereby rotating the working electrode The surface of the electrode and the counter electrode are cleaned and bubbles on the surface are eliminated. The principle of three-electrode constant potential method for detecting residual chlorine is mainly based on electrochemical reaction. A certain constant voltage is applied between the working electrode and the counter electrode. This voltage forms an electric field between the electrodes, which promotes the occurrence of electrochemical reaction. In the electrochemical reaction, the chemical substances undergo redox reaction on the electrode surface, accompanied by the flow of current. By measuring the magnitude of the current, we can infer the concentration of a certain chemical substance in the solution, such as residual chlorine. In the three-electrode constant potential method, the working electrode and the counter electrode 312 of the disinfectant are in direct contact with the water sample to be tested, and the solution contains calcium, magnesium ions and other impurities. After the water quality analyzer has been working for a long time, a layer of scale will form on the surface of the working electrode. Conventional water quality detection sensors need to be replaced after a certain period of use. The device can self-clean the working electrode through the rotation of the mechanical rotor, and the instrument can achieve long-term maintenance.

[0023] The circulation pool 1 is provided with an inlet pipe 11 and an overflow pipe 12. The overflow pipe is higher than the test tube. When the flow rate of the external water sample is unstable, the excess water sample is discharged through the overflow pipe to ensure that the water sample with a constant flow rate enters the detection chamber through the guide pipe for measurement. The space inside the circulation pool is like a buffer, which can store a certain amount of water. When the external water supply flow rate changes, it has a certain buffering effect to ensure that the water sample in the circulation pool is stable. The overflow pipe design is based on water level control. When the water pressure of the external water inlet pipe is unstable, it can ensure that the water level in the circulation pool is always constant, thereby ensuring the stability of the water sample flow rate entering the detection chamber through the inlet pipe.

[0024] The connection end 2 is provided with a filter component 21, a flow regulating component 20 and a sampling knob 22. The flow regulating component can adjust the amount of water entering the circulation pool 1. The sampling knob 22 can sample the water in the circulation pool 1 after being opened.

[0025] A reference electrode 32 is provided on the side of the detection end 3 , and the reference electrode 32 is detachable and replaceable.

[0026] When the water sample flows into the circulation pool and then flows into the detection chamber through the inflow tube, the mechanical rotor 312 is driven by the water flow to rotate, cleaning the surface of the working electrode and the counter electrode and eliminating bubbles on the surface, so that it can continuously and stably detect residual chlorine and achieve long-term low maintenance.

[0027] A pH electrode 12 is provided above the circulation pool 1. The pH electrode includes a measuring electrode which is a glass bulb that only allows hydrogen ions to pass through. The hydrogen ions form a concentration difference inside and outside the glass bulb, thereby generating an electric potential difference. This potential difference is proportional to the pH value of the solution. This potential difference is collected by the internal circuit of the sensor, and the pH value of the solution is obtained through a software algorithm.

[0028] Working principle: The circulation pool 1 is connected to the detection end 3 through the connection end 2. The circulation pool 1 is provided with an inlet pipe 11 and an overflow pipe 12. After the water sample flows into the circulation pool, the water sample reaches the detection chamber 31 in the detection end 3 through the inlet pipe for measurement and then flows out of the device. Excess water sample is discharged from the overflow pipe. The detection chamber is provided with a working electrode and a counter electrode (311) of the disinfectant, a reference electrode (32), and an integrated flow and temperature sensor 33. The concentration of the disinfectant is detected using a three-electrode constant potential method. The principle is mainly based on electrochemical reaction. A constant voltage is applied between the working electrode and the counter electrode. This voltage forms an electric field between the electrodes, which promotes the occurrence of electrochemical reaction. In the electrochemical reaction, the chemical substances undergo redox reaction on the electrode surface, accompanied by By measuring the current flow, we can infer the concentration of a certain chemical substance in the solution, such as residual chlorine. In the three-electrode constant potential method, the working electrode and counter electrode (311) of the disinfectant are in direct contact with the water sample to be tested, and the water sample may contain calcium, magnesium ions and other impurities. After the water quality analyzer has been working for a long time, a layer of scale will form on the surface of the working electrode. By installing a mechanical rotor on the working electrode and counter electrode of the disinfectant, when the water sample flows into the flow cell and then flows into the detection chamber through the inflow pipe, the water flow drives it to rotate, cleaning the surface of the working electrode and the counter electrode, so that it can continuously and stably detect the residual chlorine, chlorine dioxide, and ozone of the disinfectant. At the same time, when the mechanical rotor (312) rotates, it throws out the bubbles in the solution in the detection chamber (31). In summary, the residual chlorine measurement data is not affected by water pressure fluctuations and bubbles.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor, comprising a flow cell (1), a disinfectant measuring electrode and a counter electrode (311), a reference electrode (32), a pH electrode (313), an integrated temperature and flow sensor (33), and a connecting end (2) connected to the flow cell (1) and a detection end (3) at both ends, characterized in that: The circulation pool (1) is provided with an inlet pipe (11) and an overflow pipe (12). After the water sample flows into the circulation pool, the water sample reaches the detection chamber (31) in the detection end (3) through the inlet pipe and then flows out of the device. Excess water sample is discharged from the overflow pipe. The detection chamber is provided with a working electrode and a counter electrode (311) of the disinfectant, a reference electrode (32), and a flow and temperature integrated sensor (33). The water sample entering the detection chamber is measured by the principle of a three-electrode constant potential method, and a mechanical rotor (312) is installed on the working electrode and the counter electrode (311) of the disinfectant. When the water sample flows into the detection chamber through the inlet pipe after flowing into the circulation pool, the mechanical rotor is driven by the water flow to rotate, thereby cleaning the surface of the working electrode and the counter electrode and eliminating bubbles on the surface.

2. The steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor according to claim 1, characterized in that: An inlet pipe (11) and an overflow pipe (12) are provided in the circulation pool (1), wherein the overflow pipe is higher than the inlet pipe.

3. The steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor according to claim 1, characterized in that: The connection end (2) is provided with a filter component (21), a flow regulating component (20) and a sampling knob (22). The flow regulating component can regulate the amount of water entering the circulation pool (1). The sampling knob (22) can sample water in the circulation pool (1) when opened.

4. The steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor according to claim 1, characterized in that: A reference electrode (32) is provided on the side of the detection end (3); the water sample in the introduction tube (11) flows into the detection chamber (31) and contacts the reference electrode at the same time; and the reference electrode (32) is detachable and replaceable.

5. The steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor according to claim 1, characterized in that: The detection chamber (31) is generally conical in shape.

6. The steady-flow, bubble-eliminating, automatic-cleaning, multifunctional disinfectant measuring sensor according to claim 1, characterized in that: A pH electrode (313) is provided above the circulation pool (1), a reference electrode is provided on the left, and an integrated flow and temperature sensor is provided on the lower right.

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