Residual chlorine measuring device and residual chlorine measuring method

Abstract

The invention discloses a residual chlorine measuring device and a residual chlorine measuring method.The residual chlorine measuring device is used for detecting the chlorine content in liquid to be measured and comprises a device body, an electrode assembly, a rotating part and an electromagnetic driving part; the electrode assembly comprises a base, a first electrode and a second electrode, the base is mounted in the device main body, and a detection part formed by extending one end of the first electrode towards the interior of the circulation cavity is matched with the second electrode to detect the chlorine content in the to-be-detected liquid; the electromagnetic driving part comprises a first driving part and a second driving part, the second driving part is arranged in the rotating part, and the first driving part and the second driving part generate relative movement under the action of a magnetic field, so that the rotating part can clean impurities on the surfaces of the first electrode and the second electrode in the rotating process; the risk that bubbles in the to-be-measured liquid are attached to the surface of the electrode can be reduced, the mass transfer process of the to-be-measured liquid is accelerated, and uniform concentration of the to-be-measured liquid is ensured, so that the waste of the to-be-measured liquid is reduced while the accuracy of a residual chlorine measurement result is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of residual chlorine detection, and specifically relates to a residual chlorine measuring device and a residual chlorine measuring method. Background Art

[0002] In order to ensure that tap water meets safety and sanitation requirements, tap water is treated by adding disinfectants such as sodium hypochlorite to inactivate microorganisms in the water. After sodium hypochlorite and other disinfectants are added to the water, in addition to consuming part of the chlorine by reacting with bacteria and microorganisms in the water, some chlorine remains, which is called residual chlorine. If the residual chlorine in the water exceeds the normal range of residual chlorine, it will cause serious harm to people and the environment. Therefore, it is very important to accurately measure the residual chlorine content in the water.

[0003] In the related art, the residual chlorine content in water is monitored online by an electrochemical method. During the measurement process, impurities are easily adsorbed or deposited on the surface of the residual chlorine measuring electrode, causing contamination of the surface of the residual chlorine measuring electrode. At the same time, in the related art, a flowing water sample is continuously introduced into the residual chlorine measuring device to accelerate diffusion by utilizing the continuous flow of the water sample and maintain the uniformity of the water sample concentration during the measurement process. However, this method is not only prone to waste of water, but also easy to cause bubbles in the water sample to adhere to the surface of the residual chlorine measuring electrode, which will affect the sensitivity of the residual chlorine measuring electrode, and further affect the residual chlorine content measurement result. Summary of the invention

[0004] The present application aims to provide a residual chlorine measuring device and a residual chlorine measuring method, which can solve the problems in the related art of contamination deposited on the surface of the residual chlorine electrode, bubbles in the water sample adhering to the surface of the residual chlorine electrode affecting the accuracy of the residual chlorine measurement results, and waste of water samples.

[0005] In order to solve the above technical problems, this application is implemented as follows: In a first aspect, an embodiment of the present application provides a residual chlorine measuring device for detecting the chlorine content in a liquid to be tested, comprising: a device body, an electrode assembly, a rotating part, and an electromagnetic driving part; The device body is provided with a circulation cavity for the flow of the liquid to be tested; The electrode assembly comprises a base, a first electrode and a second electrode, the base is installed in the device body, one end of the first electrode is connected to the base, the other end of the first electrode extends toward the flow cavity to form a detection part, the second electrode is arranged on a side of the base facing the flow cavity, the detection part and the second electrode cooperate to detect the chlorine content in the liquid to be tested; The rotating member is rotatably connected to the first electrode, and the second electrode is at least partially in contact with the rotating member; The electromagnetic driving member includes a first driving member and a second driving member, the first driving member is arranged in the base, the second driving member is arranged in the rotating member, the first driving member and the second driving member are arranged opposite to each other, and at least one of the first driving member and the second driving member is suitable for being electrically connected to an external power supply so that the first driving member and the second driving member can move relative to each other under the action of the magnetic field, so as to drive the rotating member to rotate and clean impurities on the surface of the second electrode.

[0006] Optionally, the first driving member is one of an electromagnet and a permanent magnet, and the second driving member is the other of the electromagnet and the permanent magnet.

[0007] Optionally, the rotating member includes a rotating part and a wing part, the wing part is arranged at both ends of the rotating part along a direction perpendicular to the rotating axis of the rotating part, the rotating part is rotatably connected to the detection part, and the second driving member is arranged in the wing part. Optionally, the device body is provided with an inlet hole, a first outlet hole and a second outlet hole connected to the circulation cavity; along the rotating axis direction of the rotating member, the inner wall of the circulation cavity is provided with a protrusion at a position corresponding to the detection part, and a guide channel is provided in the protrusion, and the guide channel connects the first outlet hole and the circulation cavity; The liquid to be tested enters the circulation cavity from the introduction hole, and the rotating member rotates relative to the first electrode to stir the liquid to be tested, so that bubbles in the liquid to be tested accumulate in the guide channel and are discharged from the first outlet hole, and the second outlet hole is used to guide the liquid to be tested after detection.

[0008] Optionally, the guide channel has a first end and a second end that are relatively arranged, the first end is connected to the flow cavity, and the second end is connected to the first outlet hole, and the flow cross-sectional area of ​​the guide channel gradually decreases from the first end to the second end.

[0009] Optionally, the outer wall of the protrusion and the inner wall of the flow cavity enclose a collecting groove, and the second outlet hole is connected to the collecting groove.

[0010] Optionally, the residual chlorine measuring device further comprises a rotation speed detection component, which is installed in the device body and is used to detect the rotation speed of the rotating component.

[0011] Optionally, the residual chlorine measuring device further comprises a controller, which is electrically connected to the electrode assembly and the electromagnetic driving component respectively, and is used to change the frequency of the rotating magnetic field generated by the electromagnetic driving component based on the detection result of the electrode assembly.

[0012] Optionally, the residual chlorine measuring device further comprises a temperature detecting component, which is installed in the device body and at least partially extends into the flow cavity, for detecting the temperature of the liquid to be measured.

[0013] And / or, the residual chlorine measuring device also includes a third electrode, which is installed in the device body and at least partially extends into the flow cavity, and the third electrode cooperates with the first electrode and the second electrode to detect the chlorine content in the test liquid.

[0014] And / or, the residual chlorine measuring device further comprises a sampling head, wherein the sampling head is installed in the device body and is communicated with the flow cavity for conducting out the liquid to be measured.

[0015] In a second aspect, the present application embodiment proposes a residual chlorine measurement method, which is applied to the residual chlorine measurement device described in the above embodiment, comprising: Passing the liquid to be tested into the flow cavity of the device body; Using the electrode assembly to detect the chlorine content in the liquid to be tested; Using the electromagnetic driving member to drive the rotating member to rotate so as to clean the surface of the electrode assembly and adjust the measurement sensitivity of the electrode assembly; A voltage signal detected by the electrode assembly is obtained, and when the voltage signal satisfies a preset condition, the chlorine content in the test liquid is output based on the voltage signal; when the voltage signal does not satisfy the preset condition, the frequency of the rotating magnetic field generated by the electromagnetic drive component is changed to adjust the rotation speed of the rotating component.

[0016] In the embodiment of the present application, a first electrode and a second electrode are provided so that the first electrode and the second electrode cooperate to detect the chlorine content in the liquid to be tested; at the same time, a rotating member and an electromagnetic driving member are provided, and the second electrode is at least partially in contact with the rotating member, so that the electromagnetic action of the electromagnetic driving member is utilized to drive the rotating member to rotate relative to the first electrode, thereby causing the rotating member to generate friction with the surfaces of the first electrode and the second electrode during the rotation process, thereby not only cleaning the impurities on the surfaces of the first electrode and the second electrode to ensure the cleanliness of the surfaces of the first electrode and the second electrode, but also reducing the risk of bubbles in the liquid to be tested adhering to the surfaces of the first electrode and the second electrode, thereby improving the accuracy of the residual chlorine measurement result; at the same time, the rotation of the rotating member is utilized to accelerate the mass transfer process of the liquid to be tested, ensuring that the concentration of the liquid to be tested is uniform, thereby reducing the waste of the liquid to be tested.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a cross-sectional view of a residual chlorine measuring device according to an embodiment of the present application; Figure 2 is a partial cross-sectional view of a residual chlorine measuring device according to an embodiment of the present application; Figure 3 is a schematic diagram of a connection structure of a controller according to an embodiment of the present application; Figure 4 It is a step flow chart of the residual chlorine measurement method according to an embodiment of the present application.

[0019] Reference numerals: 100: device body; 110: flow chamber; 111: raised portion; 112: flow guide channel; 1121: first end; 1122: second end; 120: inlet hole; 130: first outlet hole; 140: second outlet hole; 150: collecting tank; 200: electrode assembly; 210: base; 220: first electrode; 230: second electrode; 240: third electrode; 300: rotating member; 310: rotating portion; 320: wing; 400: electromagnetic driving member; 410: first driving member; 420: second driving member; 500: rotation speed detection member; 600: temperature detection member; 700: sampling head; 800: controller; 810: conversion module; 820: control module; X: rotation axis direction. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0021] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] In the following, in conjunction with the accompanying drawings, a residual chlorine measuring device and a detection system provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0025] like Figure 1 and Figure 2As shown, according to some embodiments of the present application, a residual chlorine measuring device is used to detect the chlorine content in a liquid to be tested, comprising: a device body 100, an electrode assembly 200, a rotating member 300 and an electromagnetic driving member 400; a circulation cavity 110 for circulating the liquid to be tested is provided in the device body 100; the electrode assembly 200 comprises a base 210, a first electrode 220 and a second electrode 230, the base 210 is installed in the device body 100, one end of the first electrode 220 is connected to the base 210, and the other end of the first electrode 220 extends toward the circulation cavity 110 to form a detection part, and the second electrode 230 is provided on a side of the base 210 facing the circulation cavity 110, and the detection part and the second electrode 230 cooperate to form a detection part. Detecting the chlorine content in the test liquid; the rotating member 300 is rotatably connected to the first electrode 220, and the second electrode 230 is at least partially in contact with the rotating member 300; the electromagnetic driving member 400 includes a first driving member 410 and a second driving member 420, the first driving member 410 is arranged in the base 210, and the second driving member 420 is arranged in the rotating member 300, the first driving member 410 and the second driving member 420 are arranged opposite to each other, and at least one of the first driving member 410 and the second driving member 420 is suitable for being electrically connected to an external power supply, so that the first driving member 410 and the second driving member 420 generate relative movement under the action of the magnetic field, so as to drive the rotating member 300 to rotate and clean the impurities on the surface of the second electrode 230.

[0026] In the embodiment of the present application, the first electrode 220 and the second electrode 230 are provided so that the first electrode 220 and the second electrode 230 cooperate to detect the chlorine content in the liquid to be tested; at the same time, the rotating member 300 and the electromagnetic driving member 400 are provided, and the second electrode 230 is at least partially in contact with the rotating member 300, so that the electromagnetic action of the electromagnetic driving member 400 is used to drive the rotating member 300 to rotate relative to the first electrode 220, so that the rotating member 300 generates friction with the surfaces of the first electrode 220 and the second electrode 230 during the rotation process, so that not only the impurities on the surfaces of the first electrode 220 and the second electrode 230 can be cleaned to ensure the cleanliness of the surfaces of the first electrode 220 and the second electrode 230, but also the risk of bubbles in the liquid to be tested adhering to the surfaces of the first electrode 220 and the second electrode 230 can be reduced, thereby improving the accuracy of the residual chlorine measurement result; at the same time, the rotation of the rotating member 300 is used to accelerate the mass transfer process of the liquid to be tested, and the concentration of the liquid to be tested is ensured to be uniform, thereby reducing the waste of the liquid to be tested.

[0027] Specifically, during the operation of the second electrode 230, impurities or organic matter in the test liquid will adhere to the surfaces of the first electrode 220 and the second electrode 230, causing contamination of the first electrode 220 and the second electrode 230, affecting the efficiency of the electrode reaction, thereby reducing the accuracy of the measurement result and affecting the stability of the measurement process. Therefore, it is necessary to drive the rotating part 300 to rotate through the electromagnetic driving part 400 provided in this embodiment, so as to utilize the friction between the rotating part 300 and the first electrode 220 and the second electrode 230 during the rotation process, thereby realizing the cleaning of impurities on the surfaces of the first electrode 220 and the second electrode 230.

[0028] On the other hand, the electromagnetic action of the electromagnetic driving component 400 is used to drive the rotation of the rotating component 300. This not only can adjust the rotation speed of the rotating component 300 by changing the frequency of the rotating magnetic field generated by the electromagnetic driving component 400, but this method of driving the rotating component 300 to rotate by electromagnetic action can not only make the rotation of the rotating component 300 more stable, but also has good sealing performance, which can increase the service life of the residual chlorine measuring device.

[0029] In some embodiments, since the electromagnetic drive member 400 drives the rotating member 300 to continuously stir the liquid to be tested during the rotation process, it is difficult for the suspended matter in the liquid to be tested to be deposited in the circulation chamber 110, and the suspended matter can be quickly discharged from the circulation chamber 110, thereby avoiding contamination of the surface of the first electrode 220 and the second electrode 230. It should be noted that in the process of detecting the residual chlorine content in the liquid to be tested based on the electrochemical method, the flow rate of the liquid to be tested will affect the mass transfer process in the electrochemical reaction. In the related art, the driving force of the liquid to be tested introduced from the introduction hole 120 into the circulation chamber 110 during the flow is used to drive the rotation of the rotating member 300, accelerate the mass transfer process of the liquid to be tested, and enable the solute to remain uniform, thereby ensuring the accuracy of the residual chlorine content measurement result. However, in the residual chlorine measurement process, the liquid to be tested needs to maintain a constant flow rate, or when the rotation speed of the rotating member 300 needs to be increased, the flow rate of the liquid to be tested needs to be increased accordingly, which will cause the amount of the liquid to be tested to increase significantly, thereby causing waste of the liquid to be tested. The present application drives the rotating member 300 through the electromagnetic driving member 400, which can not only flexibly adjust the rotation speed of the rotating member 300, but also significantly reduce the waste of the test liquid, thereby saving costs.

[0030] It should also be noted that there are bubbles in the test liquid itself, and these bubbles are easy to adhere to the surfaces of the first electrode 220 and the second electrode 230, thereby affecting the sensitivity of the electrode measurement. The rotating part 300 provided in the embodiment of the present application can reduce the risk of these bubbles adhering to the surfaces of the first electrode 220 and the second electrode 230 during the rotation process, thereby further improving the accuracy of residual chlorine detection.

[0031] Optionally, the first driving member 410 is one of an electromagnet and a permanent magnet, and the second driving member 420 is the other of the electromagnet and the permanent magnet.

[0032] In the embodiment of the present application, by using an electromagnet and a permanent magnet as the first driving member 410 or the second driving member 420, not only is the structure compact and simple, and the space occupied is small, but it is also easy to install and saves costs.

[0033] Alternatively, if Figure 2 As shown, the rotating member 300 includes a rotating portion 310 and a wing portion 320 . The wing portion 320 is disposed at both ends of the rotating portion 310 along a direction X perpendicular to the rotating axis of the rotating portion 310 . The rotating portion 310 is rotatably connected to the detection portion, and the second driving member 420 is disposed in the wing portion 320 .

[0034] In the embodiment of the present application, the rotating part 310 and the wing part 320 are provided so that the rotating part 310 is rotatably connected to the detection part, and the second driving member 420 is provided in the wing part 320; in this way, the shielding of the second electrode 230 by the rotating member 300 can be reduced by the wing part 320, so that the second electrode 230 can be fully in contact with the liquid to be tested, thereby avoiding affecting the measurement process.

[0035] Specifically, a mounting hole is provided in the rotating part 310, and the portion of the detection part extending into the flow cavity 110 is rotatably connected to the rotating part 310 through the mounting hole, and the detection part is at least partially in contact with the rotating part 310, so that the rotating part 310 can generate friction with the detection part during the process of rotating around the detection part, thereby utilizing the friction to clean impurities on the surface of the detection part, thereby preventing the impurities on the surface of the detection part from affecting the accuracy of the measurement result; in addition, the second driving member 420 can be set to multiple, and the multiple second driving members 420 are arranged at intervals around the rotating part 310.

[0036] Alternatively, if Figure 1 As shown, the device body 100 is further provided with an inlet hole 120, a first outlet hole 130 and a second outlet hole 140 connected with the circulation cavity 110. Along the rotation axis direction X of the rotating member 300, a protrusion 111 is provided on the inner wall of the circulation cavity 110 at a position corresponding to the detection part. A flow guide channel 112 is provided in the protrusion 111. The flow guide channel 112 connects the first outlet hole 130 and the circulation cavity 110. The liquid to be tested enters the flow chamber 110 from the introduction hole 120, and the rotating member 300 rotates relative to the first electrode 220 to stir the liquid to be tested, so that bubbles in the liquid to be tested accumulate in the flow guide channel 112 and are discharged from the first outlet hole 130. The second outlet hole 140 is used to guide the liquid to be tested after detection.

[0037] In the embodiment of the present application, a protrusion 111 is provided at a position corresponding to the inner wall of the circulation cavity 110 and the detection part, and a flow guide channel 112 connected to the first outlet hole 130 and the circulation cavity 110 is provided in the protrusion 111. In this way, when the rotating member 300 rotates relative to the detection part to stir the liquid to be tested in the circulation cavity 110, the bubbles generated by the liquid to be tested during the stirring process can be gathered in the flow guide channel 112 and then discharged from the first outlet hole 130. The liquid to be tested after the test is discharged from the second outlet hole 140, so that the bubbles are separated from the liquid to be tested, so as to significantly reduce the bubbles in the liquid to be tested discharged from the second outlet hole 140. As a result, the liquid to be tested discharged from the second outlet hole 140 can meet the test requirements of subsequent turbidity measurement, conductivity measurement and other test items that are more sensitive to bubbles, thereby improving the accuracy of the turbidity measurement and conductivity measurement results.

[0038] In specific applications, the liquid to be tested can be tap water, and the residual chlorine measuring device can be used to measure the residual chlorine content in tap water. Specifically, tap water is mainly drawn from rivers, lakes and groundwater through the water pump station of the water plant, and is processed by the water plant through sedimentation, disinfection, filtration and other process flows in accordance with the national drinking water hygiene standards, and finally transported to each user through the pipeline network. During the process of tap water being transported through the pipeline network, it is necessary to monitor parameters such as the residual chlorine content, turbidity, pH value and conductivity in the tap water. When measuring the residual chlorine content in tap water, it is necessary to stir the tap water through the rotating part 300 to make the concentration of the tap water uniform, thereby improving the accuracy of the residual chlorine content measurement result. However, there are bubbles inside the tap water, and the tap water will also produce bubbles during the stirring process. Subsequent turbidity measurement, conductivity measurement and other measurement items are more sensitive to bubbles in the tap water. If these bubbles are discharged from the residual chlorine measurement device along with the tap water, the accuracy of the measurement results of the turbidity measurement and the conductivity measurement will be reduced. For this reason, this embodiment provides a protrusion 111 on the inner wall of the circulation cavity 110 corresponding to the detection part, and provides a diversion channel 112 in the protrusion 111 that is connected to the first derivation hole 130 and the circulation cavity 110, so as to separate the bubbles from the liquid to be measured, thereby meeting the measurement requirements of subsequent turbidity measurement and conductivity measurement.

[0039] Alternatively, if Figure 1 As shown, the guide channel 112 has a first end 1121 and a second end 1122 that are arranged opposite to each other. The first end 1121 is connected to the flow cavity 110, and the second end 1122 is connected to the first outlet hole 130. From the first end 1121 to the second end 1122, the flow cross-sectional area of ​​the guide channel 112 gradually decreases.

[0040] In the embodiment of the present application, the flow cross-sectional area of ​​the guide channel 112 is gradually reduced from the first end 1121 to the second end 1122, and the second end 1122 is connected to the first outlet hole 130. In this way, by setting the guide channel 112 to be similar to a "bell mouth" interface, it is beneficial for the guide channel 112 to collect bubbles, thereby improving the effect of the guide channel 112 in collecting bubbles, so that the bubbles are separated from the liquid to be tested in time and discharged from the first outlet hole 130, and the bubbles in the liquid to be tested discharged from the second outlet hole 140 are further reduced.

[0041] Specifically, Figure 1 As shown, the flow cross section of the flow guiding channel 112 can be set to be circular, and the radial size of the flow cross section gradually decreases from the first end 1121 to the second end 1122 of the flow guiding channel 112.

[0042] Alternatively, if Figure 1 As shown, the outer wall of the protrusion 111 and the inner wall of the flow cavity 110 enclose a collecting groove 150 , and the second outlet hole 140 is connected to the collecting groove 150 .

[0043] In the embodiment of the present application, the outer wall of the protrusion 111 and the inner wall of the flow cavity 110 are enclosed to form a collecting groove 150, and the second outlet hole 140 is connected to the collecting groove 150. When the liquid to be tested is stirred by the rotating member 300, the bubbles generated are collected in the flow guide channel 112, and the liquid to be tested flows around under the action of centrifugal force. Then, the liquid to be tested flows through the collecting groove 150 and is discharged from the second outlet hole 140, further reducing the bubbles in the liquid to be tested discharged from the second outlet hole 140, thereby meeting the requirements of subsequent turbidity measurement and conductivity measurement.

[0044] It can be understood that the collecting groove 150 is arranged around the outer periphery of the protrusion 111, and the specific arrangement of the collecting groove 150 can be flexibly arranged according to actual conditions, and this embodiment does not limit it.

[0045] Alternatively, if Figure 1 As shown, the residual chlorine measuring device further includes a rotation speed detection component 500 , which is installed in the device body 100 and is used to detect the rotation speed of the rotating component 300 .

[0046] In the embodiment of the present application, the rotation speed detection member 500 is provided in the device body 100, so that the rotation speed detection member 500 can detect the rotation speed of the rotating member 300. Based on the rotation speed of the rotating member 300, the working state of the residual chlorine measuring device can be monitored, and abnormal phenomena in the operation of the rotating member 300 can be discovered in time, so that the rotating member 300 can be repaired or replaced in time, thereby improving the operation stability of the residual chlorine measuring device.

[0047] It should be noted that the speed detection member 500 can be a contact-type speed detection member or a non-contact speed detection member. When a contact-type speed detection member is selected, the speed detection member at least partially extends into the flow cavity 110 to detect the rotation speed of the rotating member 300; when a non-contact detection member is selected, the speed detection member 500 can be a Hall sensor, such as Figure 1 As shown, the Hall sensor may be disposed close to the electromagnetic driving member 400 , so that the Hall sensor measures the speed of the rotating member 300 by detecting changes in the magnetic field.

[0048] It is understandable that the specific type and setting position of the rotation speed detection component 500 can be flexibly selected and set according to actual needs, and this embodiment does not limit it.

[0049] Alternatively, if Figure 3 As shown, the residual chlorine measuring device also includes a controller 800, which is electrically connected to the electrode assembly 200 and the electromagnetic driving member 400 respectively. The controller 800 is used to change the frequency of the rotating magnetic field generated by the electromagnetic driving member 400 based on the detection result of the electrode assembly 200.

[0050] In an embodiment of the present application, the controller 800 includes a conversion module 810 and a control module 820; the conversion module 810 is used to convert the current detected and obtained by the electrode assembly 200 into a voltage signal, and the control module 820 is used to change the frequency of the rotating magnetic field generated by the electromagnetic driving member 400 based on the voltage signal, thereby adjusting the rotation speed of the rotating member 300.

[0051] Specifically, the liquid to be tested flows into the circulation cavity 110 from the introduction hole 120, and the electromagnetic driving member 400 drives the rotating member 300 to rotate, thereby stirring the liquid to be tested to accelerate the mass transfer process of the liquid to be tested and ensure that the concentration of the liquid to be tested around the detection part is uniform; the residual chlorine in the liquid to be tested undergoes an oxidation-reduction reaction on the surface of the detection part to generate a current signal; the conversion module 810 receives the current generated by the electrode assembly 200, and then amplifies and converts the current into a voltage signal, and converts the voltage signal into a residual chlorine concentration value in the liquid to be tested according to preset calibration information, wherein the specific method of converting the voltage signal into the corresponding residual chlorine concentration value is performed with reference to the relevant technology.

[0052] In some embodiments, the surface of the electrode assembly 200 may be contaminated, thereby causing the voltage signal obtained by the conversion module 810 to be abnormal, or the uneven concentration in the liquid to be tested causes the voltage signal obtained by the conversion module 810 to exceed the preset voltage range, which will affect the accuracy of the residual chlorine concentration measurement result of the residual chlorine measurement device for the liquid to be tested. At this time, the control module 820 can change the frequency of the rotating magnetic field generated by the electromagnetic drive member 400, thereby adjusting the rotation speed of the rotating member 300, accelerating the mass transfer of chloride ions in the liquid to be tested, and improving the sensitivity of the electrode assembly 200, thereby providing the accuracy of the residual chlorine measurement result.

[0053] Alternatively, if Figure 1 As shown, the residual chlorine measuring device further includes a temperature detecting member 600, which is installed in the device body 100 and at least partially extends into the flow cavity 110 for detecting the temperature of the liquid to be measured.

[0054] In the embodiment of the present application, a temperature detection component 600 is installed in the device body 100, and the temperature detection component 600 is partially extended into the flow chamber 110. In this way, the temperature of the liquid to be tested flowing into the flow chamber 110 can be detected in real time by using the temperature data of the liquid to be tested as a reference and performing a correlation analysis with the measurement result of the residual chlorine content. The detection result of the chlorine content can be corrected accordingly, thereby improving the reliability of the measurement result.

[0055] Alternatively, if Figure 1 As shown, the residual chlorine measuring device also includes a third electrode 240, which is installed in the device body 100 and at least partially extends into the flow cavity 110. The third electrode 240 cooperates with the first electrode 220 and the second electrode 230 to detect the chlorine content in the test liquid.

[0056] In the embodiment of the present application, by installing the third electrode 240 in the device body 100 and making the third electrode 240 at least partially extend into the flow cavity 110, the third electrode 240 can be used in conjunction with the first electrode 220 and the second electrode 230 to detect the chlorine content in the test liquid.

[0057] In a specific application, the electrode assembly 200 includes a first electrode 220, a second electrode 230 and a third electrode 240, which are respectively installed in the device body 100, and the three electrodes are at least partially extended into the flow cavity 110 to contact the liquid to be tested. Among them, the first electrode 220 is a working electrode, and a detection part is provided in the working electrode, and the detection part at least extends into the flow cavity 110 to contact the liquid to be tested and undergo an oxidation-reduction reaction, thereby generating a current signal; the second electrode 230 is an auxiliary electrode, also called a counter electrode, which is used to form a test circuit with the working electrode and plays a conductive role; the third electrode 240 is a reference electrode, which is used to provide a stable potential reference, thereby correcting the potential change of the working electrode to ensure the accuracy of the measurement result.

[0058] Exemplarily, the first electrode 220 can be a solid electrode such as a platinum electrode, a gold electrode, etc.; the second electrode 230 can be a graphite electrode, a platinum electrode, etc.; the third electrode 240 can be a saturated calomel electrode, an Ag / AgCl electrode, etc.; it can be understood that the specific types of the first electrode 220, the second electrode 230 and the third electrode 240 can be flexibly selected according to the properties of the actual test liquid and the experimental conditions, and this embodiment does not limit it.

[0059] Alternatively, if Figure 1 As shown, the residual chlorine measuring device further includes a sampling head 700, which is installed in the device body 100 and communicated with the flow chamber 110 for conducting the liquid to be measured.

[0060] In the embodiment of the present application, a sampling head 700 is provided in the device body 100 , and the sampling head 700 is communicated with the flow chamber 110 , so that the test liquid can be collected through the sampling head 700 for laboratory analysis and comparison.

[0061] In one embodiment, the sampling head 700 can be a switch valve. When it is necessary to collect the test liquid for laboratory analysis and comparison, the switch valve is opened to allow the test liquid to flow out of the circulation chamber 110; when it is not necessary to collect the test liquid, the switch valve is closed to prevent the test liquid from flowing out.

[0062] Reference Figure 4 , shows a flow chart of the steps of a residual chlorine measurement method described in an embodiment of the present application, such as Figure 4 As shown, the residual chlorine measurement method may specifically include: Step 401: introducing the test liquid into the flow chamber 110 of the device body 100; Step 402: using the electrode assembly 200 to detect the chlorine content in the test liquid; Step 403: using the electromagnetic driving member 400 to drive the rotating member 300 to rotate so as to clean the surface of the electrode assembly 200 and adjust the measurement sensitivity of the electrode assembly 200; Step 404: Obtain the voltage signal detected by the electrode assembly 200, and when the voltage signal meets the preset conditions, output the chlorine content in the test liquid based on the voltage signal; when the voltage signal does not meet the preset conditions, change the frequency of the rotating magnetic field generated by the electromagnetic driving component 400 to adjust the rotation speed of the rotating component 300.

[0063] In the embodiment of the present application, the test liquid is introduced into the flow cavity 110 of the device body 100, and the first electrode 220 and the second electrode 230 in the electrode assembly 200 are electrically connected to the external power supply. After the first electrode 220 and the second electrode 230 are energized with the external power supply, the test liquid undergoes an electrochemical reaction on the surface of the first electrode 220, that is, an oxidation-reduction reaction, so as to detect the chlorine content in the test liquid; in this process, after the electromagnetic driving part 400 is connected to the external power supply, an electromagnetic effect is generated to drive the rotating part 300 to rotate, which can not only stir the test liquid to accelerate the mass transfer process of the test liquid and make the concentration of the test liquid uniform, but also clean the surface of the electrode assembly 200; the control module 820 in the controller 800 obtains the current detected by the electrode assembly 200, and the conversion module 810 converts the current into the voltage signal.

[0064] When the voltage signal meets the preset conditions, the control module 820 outputs the chlorine content in the liquid to be tested. The preset conditions include: a preset voltage range and a preset voltage signal.

[0065] When the voltage signal does not meet the preset voltage range, the control module 820 changes the frequency of the rotating magnetic field generated by the electromagnetic driving component 400 according to the preset speed parameters, and then adjusts the rotation speed of the rotating component 300 to change the mass transfer process of the electrochemical reaction, and then adjusts the sensitivity of the electrode assembly 200, so that the voltage signal meets the preset voltage range.

[0066] When the voltage signal does not meet the preset voltage signal, it indicates that there are impurities and other contaminations on the surface of the electrode assembly 200, which will reduce the effective area of ​​the electrode assembly 200 and affect the conductivity and electrochemical activity of the electrode assembly 200, thereby causing the voltage signal obtained by the conversion module 810 to be abnormal. At this time, the control module 820 can adjust the magnetic field strength of the rotating magnetic field formed by the electromagnetic driving member 400, thereby increasing the friction between the rotating member 300 and the surface of the electrode assembly 200, so as to strongly clean the contamination on the surface of the electrode assembly 200, so that the voltage signal meets the preset voltage signal.

[0067] In some embodiments, the control module 820 can also change the frequency of the rotating magnetic field generated by the electromagnetic drive member 400 to enable the rotating member 300 to achieve different rotational speeds, thereby obtaining different voltage signals generated by the test liquid in the electrode assembly 200 at different rotational speeds, and based on the proportional relationship between different voltage signals and the relationship between the voltage signal and the rotational speed, determine whether the zero point of the electrode assembly 200 drifts. It should be noted that the zero point drift of the electrode assembly 200 refers to the phenomenon that the voltage signal deviates from its original fixed value and drifts up and down when there is no input signal in the electrode assembly 200. Among them, the proportional relationship between different voltage signals and the relationship between the voltage signal and the rotational speed are determined according to relevant measurement methods, which will not be repeated here.

[0068] In summary, the residual chlorine measurement method described in the embodiment of the present application can at least include the following advantages: through the friction between the rotating part 300 and the surface of the electrode assembly 200 during the rotation process, the impurities on the surface of the electrode assembly 200 are cleaned to prevent the impurities on the surface of the electrode assembly 200 from affecting the accuracy of the residual chlorine measurement result, and the risk of bubbles in the test liquid adhering to the surfaces of the first electrode 220 and the second electrode 230 can be reduced, thereby further improving the accuracy of the residual chlorine measurement result; at the same time, the rotation of the rotating part 300 is used to accelerate the mass transfer process of the test liquid and ensure that the concentration of the test liquid is uniform, thereby reducing the waste of the test liquid.

[0069] It is understandable that the control module 820 can also adjust the voltage signal of the electrode assembly 200 to cause the test liquid to undergo an oxidation-reduction reaction on the surface of the electrode assembly 200, that is, the test liquid undergoes a hydrogen evolution reaction or an oxygen evolution reaction on the surface of the electrode assembly, so as to utilize the generated hydrogen or oxygen to further clean the contamination on the surface of the electrode assembly 200.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A residual chlorine measuring device for detecting the chlorine content in a liquid to be tested, characterized in that: include: Device body, electrode assembly, rotating part and electromagnetic drive part; The device body is provided with a circulation cavity for the flow of the liquid to be tested; The electrode assembly comprises a base, a first electrode and a second electrode, the base is installed in the device body, one end of the first electrode is connected to the base, the other end of the first electrode extends toward the flow cavity to form a detection part, the second electrode is arranged on a side of the base facing the flow cavity, the detection part and the second electrode cooperate to detect the chlorine content in the liquid to be tested; The rotating member is rotatably connected to the first electrode, and the second electrode is at least partially in contact with the rotating member; The electromagnetic driving member includes a first driving member and a second driving member, the first driving member is arranged in the base, the second driving member is arranged in the rotating member, the first driving member and the second driving member are arranged opposite to each other, and at least one of the first driving member and the second driving member is suitable for being electrically connected to an external power supply so that the first driving member and the second driving member can move relative to each other under the action of a magnetic field, so as to drive the rotating member to rotate and clean impurities on the surfaces of the first electrode and the second electrode.

2. The residual chlorine measuring device according to claim 1, characterized in that: The first driving member is one of an electromagnet and a permanent magnet, and the second driving member is the other of the electromagnet and the permanent magnet.

3. The residual chlorine measuring device according to claim 2, characterized in that: The rotating member includes a rotating part and a wing part. The wing part is arranged at two ends of the rotating part along a direction perpendicular to the rotating axis of the rotating part. The rotating part is rotatably connected to the detection part. The second driving member is arranged in the wing part.

4. The residual chlorine measuring device according to claim 1, characterized in that: The device body is provided with an inlet hole, a first outlet hole and a second outlet hole connected with the circulation cavity; along the rotation axis direction of the rotating member, the inner wall of the circulation cavity is provided with a protrusion at a position corresponding to the detection part, and the protrusion is provided with a flow guide channel, and the flow guide channel connects the first outlet hole and the circulation cavity; The liquid to be tested enters the circulation cavity from the introduction hole, and the rotating member rotates relative to the first electrode to stir the liquid to be tested, so that bubbles in the liquid to be tested accumulate in the guide channel and are discharged from the first outlet hole, and the second outlet hole is used to guide the liquid to be tested after detection.

5. The residual chlorine measuring device according to claim 4, characterized in that: The flow guide channel has a first end and a second end that are arranged opposite to each other, the first end is communicated with the flow cavity, and the second end is communicated with the first outlet hole, and the flow cross-sectional area of ​​the flow guide channel gradually decreases from the first end to the second end.

6. The residual chlorine measuring device according to claim 4, characterized in that: The outer wall of the protrusion and the inner wall of the flow cavity are combined to form a collecting groove, and the second outlet hole is communicated with the collecting groove.

7. The residual chlorine measuring device according to any one of claims 1 to 6, characterized in that: The residual chlorine measuring device also includes a rotation speed detection component, which is installed in the device body and is used to detect the rotation speed of the rotating component.

8. The residual chlorine measuring device according to claim 7, characterized in that: The residual chlorine measuring device also includes a controller, which is electrically connected to the electrode assembly and the electromagnetic driving member respectively, and is used to change the frequency of the rotating magnetic field generated by the electromagnetic driving member based on the detection result of the electrode assembly.

9. The residual chlorine measuring device according to claim 7, characterized in that: The residual chlorine measuring device further comprises a temperature detecting member, which is installed in the device body and at least partially extends into the flow cavity, and is used to detect the temperature of the liquid to be measured; And / or, the residual chlorine measuring device further comprises a third electrode, the third electrode is installed in the device body and at least partially extends into the flow cavity, the third electrode cooperates with the first electrode and the second electrode to detect the chlorine content in the liquid to be tested; And / or, the residual chlorine measuring device further comprises a sampling head, which is installed in the device body and communicated with the flow cavity for exporting the liquid to be measured.

10. A method for measuring residual chlorine, characterized in that: The residual chlorine measuring device applied to any one of claims 1 to 9 comprises: Passing the liquid to be tested into the flow cavity of the device body; Using the electrode assembly to detect the chlorine content in the liquid to be tested; Using the electromagnetic driving member to drive the rotating member to rotate, so as to clean the surface of the electrode assembly and adjust the measurement sensitivity of the electrode assembly; A voltage signal detected by the electrode assembly is obtained, and when the voltage signal satisfies a preset condition, the chlorine content in the test liquid is output based on the voltage signal; when the voltage signal does not satisfy the preset condition, the frequency of the rotating magnetic field generated by the electromagnetic drive component is changed to adjust the rotation speed of the rotating component.

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