Thin-layer channel electrochemical sensor for online detection of available chlorine concentration

Abstract

The invention belongs to the technical field of electrochemical sensors, and particularly relates to a thin-layer channel electrochemical sensor for online detection of available chlorine concentration, the thin-layer channel electrochemical sensor comprises a butt joint seat, a reference electrode module, a working electrode module, an acid path cleaning assembly and an alkali path cleaning assembly, and the alkali path cleaning assembly is located right below the acid path cleaning assembly. In order to solve the problems that in the prior art, after a working electrode and a reaction cup are cleaned, electrolyte needs to be added again, the whole process is tedious, a large amount of electrolyte needs to be consumed, the detection efficiency and speed are reduced, and meanwhile the detection cost is increased, through cooperation of an acid path cleaning assembly and an alkali path cleaning assembly, the detection efficiency is improved; according to the cleaning device, cleaning and impurity removal can be carried out without disassembly, the total time required by continuous detection is shortened, so that the detection efficiency is improved, meanwhile, a worker can select different cleaning modes according to the actual detection frequency, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electrochemical sensors, and in particular relates to a thin-layer channel electrochemical sensor for online detection of effective chlorine concentration. Background Art

[0002] Hypochlorous acid disinfectant has strong bactericidal ability, fast speed, wide bactericidal spectrum and good safety, and has attracted attention from medical and health, food processing, planting and breeding and other fields. In recent years, its application has been rapidly promoted and has become the best choice to replace traditional disinfectants such as 84 liquid, alcohol, peracetic acid, hydrogen peroxide, etc. When the concentration of hypochlorous acid disinfectant is detected online, the effective chlorine concentration of hypochlorous acid is evaluated by measuring the redox potential (ORP) of the solution. The redox point value changes with the change of the pH value of the solution, resulting in uncertainty in the online detection value. In addition, when detecting the effective chlorine concentration, the liquid to be tested is added to the reaction cup for detection. The long-term exposure of the liquid to be tested to the air will increase the experimental error. In order to reduce the resistance R value of the solution to be tested, electrolytes need to be added to the reaction cup to reduce the resistance. However, when performing continuous detection, in order to ensure the detection accuracy, the working electrode and the reaction cup need to be cleaned every once in a while, but electrolytes need to be added again after cleaning. The whole process is cumbersome and consumes a lot of electrolytes, which reduces the efficiency and speed of detection and increases the detection cost. Summary of the invention

[0003] 1. Technical issues to be resolved The present invention provides a thin-layer channel electrochemical sensor for online detection of effective chlorine concentration in order to solve the following problems: 1. Long-term exposure of the test liquid to the air will lead to increased experimental errors; 2. After cleaning the working electrode and the reaction cup, electrolyte needs to be added again. The whole process is cumbersome and consumes a large amount of electrolyte, which reduces the efficiency and speed of detection and increases the detection cost.

[0004] (II) Technical content To achieve the above object, the present invention provides the following technical solutions: A thin-layer channel electrochemical sensor for online detection of effective chlorine concentration comprises a docking seat, a reference electrode module and a working electrode module, wherein the working electrode module is mounted on the docking seat; A tetrafluoroethylene gasket is placed on the upper surface of the working electrode module, the reference electrode module is installed on the working electrode module, and the bottom of the reference electrode module is in contact with the tetrafluoroethylene gasket, and the tetrafluoroethylene gasket is provided with a thin layer channel; The reference electrode module is provided with a liquid inlet cavity, a reference electrode hole connected to the liquid inlet cavity is provided at the bottom of the reference electrode module, a reference electrode assembly connected to the liquid inlet cavity is installed on the top of the reference electrode module, a liquid inlet structure connected to the liquid inlet cavity is installed on one side of the reference electrode module, the reference electrode module is also provided with a liquid drainage groove, a liquid drainage structure is installed on the top of the liquid drainage groove, and a working electrode assembly connected to the reference electrode hole is installed in the working electrode module; The liquid inlet structure includes a first connecting screw rod, the first connecting screw rod is threadedly connected to the reference electrode module, the other end of the first connecting screw rod is fixedly connected to the first screwing portion, an introduction tube is fixedly embedded inside the first connecting screw rod, one end of the introduction tube passes through the first connecting screw rod and is connected to the liquid inlet cavity, and the other end passes through the first connecting screw rod and the first screwing portion and extends outside; The reference electrode hole, the working electrode assembly, and the drainage channel are all connected to the thin layer channel; The docking seat is provided with a positioning structure for fixing the positions of the reference electrode module and the working electrode module; A cleaning structure is arranged on one side of the docking seat, and the cleaning structure comprises a cleaning shell and an acid path cleaning component and an alkali path cleaning component installed in the cleaning shell. The acid path cleaning component and the alkali path cleaning component are connected to the liquid inlet structure through the same single-pass component.

[0005] Further, the alkaline path cleaning assembly is located directly below the acid path cleaning assembly; The acid path cleaning assembly comprises an acid storage box, a docking module, a torsion spring and a locking splint. A threaded rod is rotatably connected in the acid storage box, a first push plate is threadedly engaged on the threaded rod, a side wall of the first push plate is slidably connected to an inner wall of the acid storage box, a docking rod is fixedly connected to the bottom of the first push plate, the bottom of the docking rod slides through the acid storage box and extends outside, and a cross-shaped docking module is fixedly connected to the free end, and adjustment ports are arranged at both ends of the docking module, torsion springs are rotatably connected in the two adjustment ports, a locking splint is rotatably connected in the adjustment port, and both ends of the torsion spring are fixedly connected to the inner wall of the adjustment port and the locking splint, respectively, a top moving part is symmetrically arranged at the bottom of the acid storage box, a top end of the locking splint is in contact with the top moving part, and a clamping part is arranged at the bottom end of the locking splint; The alkali path cleaning assembly comprises an alkali storage box and a second push plate, the side wall of the second push plate is slidably connected to the inner wall of the alkali storage box, a reset spring is fixedly connected to the bottom of the inner cavity of the alkali storage box, the top of the reset spring is fixedly connected to the second push plate, the top of the second push plate is fixedly connected to a docking connecting rod, the top of the docking connecting rod slides through the alkali storage box and extends outside, and two sides of the docking connecting rod are provided with clamping grooves adapted to the clamping part; The acid storage box and the alkali storage box are respectively connected to the same single-pass component through the first row of pipes and the second row of pipes.

[0006] Furthermore, two groups of docking rods are provided and symmetrically distributed on the top of the docking module; One side of the locking splint is fixedly connected with a limit connecting rod, and both ends of the limit connecting rod are rotatably connected with the adjustment port; The single-pass component includes a flow tube, the interior of which is slidably connected with a sliding block, the bottom of the inner cavity of the acid storage box is fixedly connected to the top of the inner cavity of the flow tube through a first row of tubes; the top of the inner cavity of the alkali storage box is fixedly connected to the bottom of the inner cavity of the flow tube through a second row of tubes, one side of the flow tube is connected with a docking sleeve, the free end of the docking sleeve is provided with a sleeve interface, and one end of the introduction tube away from the liquid inlet cavity is detachably plugged into the sleeve interface.

[0007] Furthermore, a rotating motor is installed on the acid storage box, the rotating motor is connected to the peripheral control terminal for signal transmission, and the top of the threaded rod slides through the acid storage box and is fixedly connected to the rotating shaft of the rotating motor; A push-type stopper and a push-type direction adjuster connected to the rotating motor by signal transmission are respectively installed on the top and bottom of one side of the inner cavity of the acid storage box; The acid storage box is connected with an acid adding tank through a one-way pump, and the alkali storage box is connected with an alkali adding tank through a one-way pump.

[0008] Furthermore, the reference electrode assembly includes a placement sleeve and a reference electrode head, the liquid inlet cavity is T-shaped, the placement sleeve is hollow inside and both upper and lower ends are open, the placement sleeve is threadedly connected in the liquid inlet cavity, and a ceramic permeable membrane is installed at the bottom of the placement sleeve; A reference electrode head is arranged at the top of the placement sleeve, a reference electrode wire is arranged at the top of the reference electrode head, the free end of the reference electrode wire is electrically connected to the external electrical signal detection system, the bottom of the reference electrode head is connected to an Ag / AgCl rod, the free end of the Ag / AgCl rod extends in the placement sleeve, a reference electrode head sealing ring is arranged at the bottom of the reference electrode head, and the bottom of the reference electrode head sealing ring is abutted against the horizontal end of the T-shaped liquid inlet cavity.

[0009] Furthermore, a first pair of interfaces connected to the liquid inlet cavity is provided on one side of the reference electrode module, and a first sealing ring is attached to the inner wall of the first pair of interfaces; One end of the first connecting screw rod is threadedly connected to the first docking port and the end portion is abutted against the first sealing ring. A second sealing ring is embedded on the side of the first screwing portion close to the reference electrode module. One end of the introduction tube away from the liquid inlet cavity is connected to the sample outlet of the hypochlorous acid disinfectant water production line through a pulsation-free pump.

[0010] Furthermore, the drainage groove is provided with a second docking port, the inner wall of the second docking port is provided with a third sealing ring, the drainage structure includes a second connecting screw rod, one end of the second connecting screw rod is threadedly connected to the second docking port and the end thereof is abutted against the third sealing ring, a guide tube is fixedly embedded inside the second connecting screw rod, one end of the guide tube passes through the second connecting screw rod and is connected to the drainage groove; The other end of the second connecting screw rod is fixedly connected to the second screwing part, and a fourth sealing ring is embedded on the side of the second screwing part close to the reference electrode module. The other end of the derivation tube passes through the second screwing part and extends outside, and the end is connected to the external recovery container.

[0011] Furthermore, the working electrode assembly includes a gold working electrode and a gold counter electrode. Two embedding holes are opened on the working electrode module. The gold working electrode and the gold counter electrode are installed in the embedding holes, and the upper surfaces of the gold working electrode and the gold counter electrode are flush with the upper surfaces of the embedding holes. A gold working electrode wire is provided at the bottom of the gold working electrode, and a gold counter electrode wire is provided at the bottom of the gold counter electrode. The free ends of the gold working electrode wire and the gold counter electrode wire both pass through the working electrode module and extend outside. The gold working electrode wire and the gold counter electrode wire are both electrically connected to the external electrical signal detection system.

[0012] Furthermore, a plurality of positioning rods are installed at the bottom of the reference electrode module, a positioning socket corresponding to the plurality of positioning rods is provided on the upper surface of the working electrode module, a positioning through-hole corresponding to the plurality of positioning rods is provided on the tetrafluoroethylene gasket, and the free ends of the plurality of positioning rods pass through the positioning through-holes and are plugged into the positioning sockets; The thickness of the tetrafluoroethylene gasket is 25 μm; The upper surface of the gold working electrode is circular and has a diameter of 1 mm; The gold working electrode is located just below the reference electrode hole.

[0013] Furthermore, the positioning structure includes a balance plate and two bolt pressure heads, two spring grooves are provided on one side of the inner wall of the docking seat, two sliders are provided on one side of the balance plate, the sliders are slidably connected in the spring grooves, springs are provided in the two spring grooves, and one end of the spring is fixedly connected to the slider, and the other end is fixedly connected to the top of the inner cavity of the spring groove; The top of the docking seat is threadedly connected to two bolt pressure heads, and the bottom ends of the two bolt pressure heads are threadedly penetrated through the docking seat and abut against the upper surface of the balance plate; A positioning prompt plate is provided at the bottom of the inner wall of the docking seat, and the positioning prompt plate is in contact with the working electrode module; The balance plate is provided with two avoidance holes, the reference electrode head is located in one of the avoidance holes, the second screwing part is located in the other avoidance hole, the top of the docking seat is also threadedly connected with a reference electrode pressure head, the bottom end of the reference electrode pressure head is threadedly passed through the docking seat and contacts the upper surface of the reference electrode head; An avoidance groove is provided at the bottom of the docking seat, and the free ends of the gold working electrode wire and the gold counter electrode wire both pass through the avoidance groove and extend outside; The four corners of the bottom of the docking seat are all provided with mounting grooves, and heightening legs are rotatably connected in the plurality of mounting grooves.

[0014] (III) Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the hypochlorous acid disinfectant to be tested flows into the inlet pipe and sequentially flows through the first interface, the liquid inlet cavity, the thin layer channel, the liquid discharge groove and finally flows out from the outlet pipe. The entire detection process is isolated from the outside world to reduce errors.

[0015] 2. In the present invention, by setting the thickness of the tetrafluoroethylene gasket to 25 μm, the distance between the reference electrode hole and the gold working electrode is precisely controlled at 25 μm, and the thickness of the thin layer channel is also precisely controlled at 25 μm, thereby effectively reducing the solution measurement resistance R value. The upper surface of the gold working electrode is circular and has a diameter of 1 mm, which can effectively reduce the measurement current density I, thereby reducing the IR value of the measurement system, thereby achieving the purpose of accurately measuring the effective chlorine concentration without adding electrolytes.

[0016] 3. In the present invention, by cooperating with the acid path cleaning component and the alkaline path cleaning component, cleaning and removal of impurities can be achieved without disassembly, thereby reducing the total time required for continuous detection and improving detection efficiency.

[0017] Fourth, in the present invention, the staff can choose different cleaning methods according to the actual number of inspections to improve work efficiency.

[0018] 5. In the present invention, the first sealing ring is provided to isolate the first interface from the liquid inlet cavity, thereby ensuring the airtightness inside the liquid inlet cavity. At the same time, it can also prevent the solution to be tested from flowing into the first interface, thereby increasing the error in chlorine concentration detection. The second sealing ring is provided to further ensure the airtightness inside the liquid inlet cavity.

[0019] 6. In the present invention, the third sealing ring can prevent hypochlorous acid disinfectant water from flowing into the second port, thereby affecting the discharge of hypochlorous acid disinfectant water from the outlet pipe, and the fourth sealing ring can further ensure the air tightness inside the liquid inlet cavity.

[0020] 7. In the present invention, the balance plate is driven to move by rotating two bolt pressure heads, which can ensure that when the balance plate moves to any position, under the action of the bolt pressure heads and the springs, the balance plate will not reset or automatically move down, so that the staff can free their hands to pass the reference electrode wire and the other end of the lead-out tube through the avoidance hole.

[0021] 8. In the present invention, the height of the bottom of the docking seat can be increased by setting the heightened legs, so as to prevent the docking seat from squeezing the gold working electrode wire and the gold counter electrode wire, thereby causing damage to the gold working electrode wire and the gold counter electrode wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional schematic diagram of the present invention as a whole; Figure 2 A bottom view of the present invention as a whole; Figure 3 It is a cross-sectional view of the reference electrode module, the working electrode module and the tetrafluoroethylene gasket in the present invention; Figure 4 It is a schematic diagram of the explosion of the reference electrode module, the working electrode module and the tetrafluoroethylene gasket in the present invention; Figure 5 is a cross-sectional view of the reference electrode module of the present invention; Figure 6 for Figure 5 A local enlarged schematic diagram of the middle A; Figure 7 It is a schematic diagram of the liquid inlet structure in the present invention; Figure 8 for Figure 5 A partial enlarged schematic diagram of point B in the middle; Fig. 9 is a schematic diagram of the liquid discharge structure in the present invention; Fig.10 is a cross-sectional view of the working electrode module of the present invention; Fig.11 is a cross-sectional view of a reference electrode assembly in the present invention; Fig.12 is a schematic diagram of the positioning structure in the present invention; Fig.13 is a schematic diagram of a balance board and a slider in the present invention; Fig.14 A schematic diagram of cleaning the interior of the housing in the present invention; Fig.15 It is a schematic diagram of the interior of the acid storage box in the present invention; Fig.16 It is a bottom view of the interior of the acid storage box in the present invention; Fig.17 It is a schematic diagram of the docking module, torsion spring and locking clamp in the present invention; Fig.18 It is a schematic diagram of the interior of the alkali storage box in the present invention; Fig.19 It is a partial cutaway view of a single-pass component in the present invention; Fig. 20It is a schematic diagram of the position of the first push plate when the cleaning work is completed in the present invention.

[0023] In the figure: 1, docking seat; 2, reference electrode module; 3, working electrode module; 4, tetrafluoroethylene gasket; 5, thin layer channel; 6, liquid inlet cavity; 7, reference electrode hole; 8, drainage channel; 9, installation sleeve; 10, reference electrode head; 11, reference electrode head sealing ring; 12, ceramic permeable membrane; 13, reference electrode wire; 14, Ag / AgCl rod; 15, first docking port; 16, first sealing ring; 17, first connecting screw rod; 18, Introduction tube; 19, first screwing part; 20, second sealing ring; 21, second interface; 22, third sealing ring; 23, second connecting screw rod; 24, outlet tube; 25, second screwing part; 26, fourth sealing ring; 27, gold working electrode; 28, gold counter electrode; 29, embedding hole; 30, gold working electrode wire; 31, gold counter electrode wire; 32, positioning rod; 33, positioning jack; 34, positioning perforation; 35, balance board; 36, screw Bolt pressure head; 37, spring slot; 38, slider; 39, spring; 40, positioning prompt plate; 41, avoidance hole; 42, reference electrode pressure head; 43, avoidance slot; 44, installation slot; 45, heightening legs; 46, first row of pipes; 47, cleaning structure; 48, cleaning shell; 49, acid path cleaning assembly; 50, alkali path cleaning assembly; 51, acid storage box; 52, docking module; 53, torsion spring; 54, locking splint; 55, threaded rod; 56, the first A push plate; 57, docking rod; 58, alkali adding box; 59, adjusting port; 60, pushing part; 61, clamping part; 62, alkali storage box; 63, second push plate; 64, return spring; 65, docking connecting rod; 66, clamping groove; 67, sleeve port; 68, limit connecting rod; 69, flow tube; 70, sliding block; 71, docking sleeve; 72, rotating motor; 73, push-type stopper; 74, push-type direction adjuster; 75, acid adding box; 76, second row of pipes. DETAILED DESCRIPTION

[0024] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0025] Embodiment 1 like Figure 1-Figure 20 As shown, a thin-layer channel electrochemical sensor for online detection of effective chlorine concentration includes a docking seat 1, a reference electrode module 2 and a working electrode module 3, wherein the working electrode module 3 is mounted on the docking seat 1; A tetrafluoroethylene gasket 4 is placed on the upper surface of the working electrode module 3, and the reference electrode module 2 is installed on the working electrode module 3, and the bottom of the reference electrode module 2 is in contact with the tetrafluoroethylene gasket 4, such as Figure 4 As shown, the tetrafluoroethylene gasket 4 is provided with a thin layer channel 5; like Figure 3 and 5 As shown, the reference electrode module 2 is provided with a liquid inlet cavity 6, a reference electrode hole 7 connected to the liquid inlet cavity 6 is provided at the bottom of the reference electrode module 2, a reference electrode assembly connected to the liquid inlet cavity 6 is installed on the top of the reference electrode module 2, a liquid inlet structure connected to the liquid inlet cavity 6 is installed on one side of the reference electrode module 2, the reference electrode module 2 is also provided with a liquid drainage groove 8, a liquid drainage structure is installed on the top of the liquid drainage groove 8, and a working electrode assembly connected to the reference electrode hole 7 is installed in the working electrode module 3; The liquid inlet structure includes a first connecting screw rod 17, which is threadedly connected to the reference electrode module 2, and the other end of the first connecting screw rod 17 is fixedly connected to a first screwing portion 19, and an introduction tube 18 is fixedly embedded inside the first connecting screw rod 17, one end of the introduction tube 18 passes through the first connecting screw rod 17 and is connected to the liquid inlet chamber 6, and the other end passes through the first connecting screw rod 17 and the first screwing portion 19 and extends outside; The reference electrode hole 7 , the working electrode assembly, and the liquid drainage groove 8 are all connected to the thin layer channel 5 .

[0026] Further, the reference electrode assembly includes a placement sleeve 9 and a reference electrode head 10, such as Figure 3 , Figure 5 and Fig.11 As shown, the liquid inlet cavity 6 is T-shaped. Fig.11 As shown, the placement sleeve 9 is hollow inside and has openings at both ends. The placement sleeve 9 is threadedly connected to the liquid inlet cavity 6. A ceramic permeable membrane 12 is installed at the bottom of the placement sleeve 9. A reference electrode head 10 is arranged at the top of the placement sleeve 9, a reference electrode wire 13 is arranged at the top of the reference electrode head 10, the free end of the reference electrode wire 13 is electrically connected to the external electrical signal detection system, the bottom of the reference electrode head 10 is connected to an Ag / AgCl rod 14, the free end of the Ag / AgCl rod 14 extends in the placement sleeve 9, a reference electrode head sealing ring 11 is arranged at the bottom of the reference electrode head 10, the bottom of the reference electrode head sealing ring 11 is abutted against the horizontal end of the T-shaped liquid inlet cavity 6, and the reference electrode head sealing ring 11 is arranged to increase the sealing performance. To prevent the saturated potassium chloride solution from leaking out, the installation sleeve 9 is first threadedly connected to the liquid inlet chamber 6 during installation, and the saturated potassium chloride solution is added to the installation sleeve 9, and then the reference electrode head 10 connected with the Ag / AgCl rod 14 is placed on the top of the installation sleeve 9, so that the Ag / AgCl rod 14 is immersed in the saturated potassium chloride solution. The concentrations of silver ions and chloride ions are kept constant under saturation. The impurities in the liquid inlet chamber 6 can be prevented from passing through by the provided ceramic permeable membrane 12, and a known potential reference point can be provided by the provided reference electrode assembly as a reference; Further, such as Figure 5-Figure 7 As shown, a first interface 15 communicating with the liquid inlet cavity 6 is provided on one side of the reference electrode module 2, and a first sealing ring 16 is attached to the inner wall of the first interface 15; One end of the first connecting screw rod 17 is threadedly connected to the first docking port 15 and the end thereof is in contact with the first sealing ring 16. A second sealing ring 20 is embedded in the side of the first screwing portion 19 close to the reference electrode module 2. One end of the introduction tube 18 away from the liquid inlet cavity 6 is connected to the sample outlet of the hypochlorous acid disinfectant water production line through a pulsation-free pump (not shown in the figure). During detection, the end of the introduction tube 18 away from the liquid inlet cavity 6 is connected to the pulsation-free pump, so that the hypochlorous acid disinfectant water production line delivers the hypochlorous acid disinfectant water into the introduction tube 18 through the sample outlet and the pulsation-free pump.

[0027] Specifically, during installation, the first screwing portion 19 is rotated, and the first screwing portion 19 drives the first connecting screw rod 17 to rotate, and then the first connecting screw rod 17 is screwed into the first docking port 15. The first sealing ring 16 is provided to isolate the first docking port 15 from the liquid inlet chamber 6 to ensure the airtightness inside the liquid inlet chamber 6. At the same time, it can also prevent the solution to be tested from flowing into the first docking port 15, resulting in an increase in the error in the detection of chlorine concentration. The second sealing ring 20 is provided to further ensure the airtightness inside the liquid inlet chamber 6.

[0028] Further, such as Figure 5 , Figure 8 and Fig. 9As shown, the drainage groove 8 is provided with a second docking port 21, the inner wall of the second docking port 21 is provided with a third sealing ring 22, the drainage structure includes a second connecting screw rod 23, one end of the second connecting screw rod 23 is threadedly connected to the second docking port 21 and the end thereof is in contact with the third sealing ring 22, a guide tube 24 is fixedly embedded inside the second connecting screw rod 23, one end of the guide tube 24 passes through the second connecting screw rod 23 and is connected to the drainage groove 8; The other end of the second connecting screw rod 23 is fixedly connected to the second screwing part 25, and a fourth sealing ring 26 is embedded in the side of the second screwing part 25 close to the reference electrode module 2. The other end of the derivation tube 24 passes through the second screwing part 25, and the end is connected to an external recovery container to facilitate the recovery and storage of the liquid in the liquid inlet cavity 6, the thin layer channel 5 and the liquid discharge groove 8.

[0029] Specifically, during installation, the second screwing portion 25 is rotated, and the second screwing portion 25 drives the second connecting screw rod 23 to rotate, and then the second connecting screw rod 23 is screwed into the second docking port 21. The third sealing ring 22 is provided to prevent hypochlorous acid disinfectant water from flowing into the second docking port 21, thereby affecting the discharge of hypochlorous acid disinfectant water from the outlet pipe 24. The fourth sealing ring 26 is provided to further ensure the air tightness inside the liquid inlet chamber 6.

[0030] Further, such as Figure 3 and Fig.10 As shown, the working electrode assembly includes a gold working electrode 27 and a gold counter electrode 28. Two embedding holes 29 are provided on the working electrode module 3. The gold working electrode 27 and the gold counter electrode 28 are installed in the embedding holes 29, and the upper surfaces of the gold working electrode 27 and the gold counter electrode 28 are flush with the upper surfaces of the embedding holes 29. A gold working electrode wire 30 is provided at the bottom of the gold working electrode 27, and a gold counter electrode wire 31 is provided at the bottom of the gold counter electrode 28. The free ends of the gold working electrode wire 30 and the gold counter electrode wire 31 both penetrate the working electrode module 3 and extend outside. The gold working electrode wire 30 and the gold counter electrode wire 31 are both electrically connected to the external electrical signal detection system.

[0031] Further, such as Figure 4 As shown, a plurality of positioning rods 32 are installed at the bottom of the reference electrode module 2, a positioning socket 33 corresponding to the plurality of positioning rods 32 is opened on the upper surface of the working electrode module 3, and a positioning through hole 34 corresponding to the plurality of positioning rods 32 is opened on the tetrafluoroethylene gasket 4, and the free ends of the plurality of positioning rods 32 pass through the positioning through holes 34 and are plugged into the positioning socket 33; During installation, first place the tetrafluoroethylene gasket 4 on the upper surface of the working electrode module 3, align the positioning through hole 34 with the positioning socket 33, and then insert the positioning rod 32 at the bottom of the reference electrode module 2 into the positioning through hole 34 and the positioning socket 33, clamp the tetrafluoroethylene gasket 4 by the reference electrode module 2 and the working electrode module 3, and limit the position of the tetrafluoroethylene gasket 4 by the positioning rod 32 to prevent the tetrafluoroethylene gasket 4 from shifting during operation, thereby affecting the accuracy of detection; The thickness of the tetrafluoroethylene gasket 4 is 25 μm; The upper surface of the gold working electrode 27 is circular and has a diameter of 1 mm; The gold working electrode 27 is located directly below the reference electrode hole 7 .

[0032] By setting the thickness of the tetrafluoroethylene gasket 4 to 25 μm, the distance between the reference electrode hole 7 and the gold working electrode 27 is precisely controlled at 25 μm, and the thickness of the thin layer channel 5 is also precisely controlled at 25 μm, thereby effectively reducing the solution measurement resistance R value. The upper surface of the gold working electrode 27 is circular and has a diameter of 1 mm, which can effectively reduce the measurement current density. I , thereby reducing the measurement system I R value, thereby achieving the purpose of accurately measuring the effective chlorine concentration without adding electrolytes, reducing experimental costs.

[0033] like Figure 1 , Fig.12 and Fig.13 As shown, a positioning structure for fixing the positions of the reference electrode module 2 and the working electrode module 3 is provided on the docking seat 1, and the positioning structure includes a balance plate 35 and two bolt pressure heads 36. Two spring grooves 37 are provided on one side of the inner wall of the docking seat 1, and two sliders 38 are provided on one side of the balance plate 35. The sliders 38 are slidably connected in the spring grooves 37. Springs 39 are provided in both spring grooves 37, and one end of the spring 39 is fixedly connected to the slider 38, and the other end is fixedly connected to the top of the inner cavity of the spring groove 37; The top of the docking seat 1 is threadedly connected to two bolt pressure heads 36, and the bottom ends of the two bolt pressure heads 36 are threadedly passed through the docking seat 1 and abut against the upper surface of the balance plate 35; A positioning prompt plate 40 is provided at the bottom of the inner wall of the docking seat 1, and the positioning prompt plate 40 is in contact with the working electrode module 3. During installation, the working electrode module 3 is placed on the docking seat 1, and the two side faces of the working electrode module 3 are respectively fitted with one side of the inner wall of the docking seat 1 and the positioning prompt plate 40 to complete the positioning.

[0034] After the reference electrode module 2, the tetrafluoroethylene gasket 4 and the working electrode module 3 are installed, the two bolt pressure heads 36 are rotated clockwise, and the two bolt pressure heads 36 press the balance plate 35 downward, and the balance plate 35 slides downward along the spring groove 37 through the slider 38 so that the bottom of the balance plate 35 contacts the top of the reference electrode module 2, and the reference electrode module 2 is pressed to increase the stability between the reference electrode module 2, the tetrafluoroethylene gasket 4 and the working electrode module 3; Furthermore, the balancing plate 35 is provided with two avoidance holes 41. As the balancing plate 35 moves downward, the reference electrode head 10 is located in one of the avoidance holes 41, and the second screwing portion 25 is located in the other avoidance hole 41. When moving, the staff passes the other end of the reference electrode wire 13 and the export tube 24 through the avoidance hole 41 to prevent the reference electrode wire 13 and the export tube 24 of the balancing plate 35 from being squeezed between the balancing plate 35 and the reference electrode module 2, thereby causing damage to the reference electrode wire 13 and the export tube 24 being unable to drain normally. When the balancing plate 35 moves downward, the spring 39 is in a stretched state. In the present invention, the balancing plate 35 is driven by rotating the two bolt pressure heads 36. 5 can be moved to ensure that when the balance plate 35 moves to any position, under the action of the bolt pressure head 36 and the spring 39, the balance plate 35 will not be reset or automatically moved down, so that the staff can free their hands to pass the reference electrode wire 13 and the other end of the outlet tube 24 through the avoidance hole 41. The top of the docking seat 1 is also threadedly connected with a reference electrode pressure head 42. By rotating the reference electrode pressure head 42 clockwise, the reference electrode pressure head 42 moves downward. The bottom end of the reference electrode pressure head 42 is threaded through the docking seat 1 and contacts the upper surface of the reference electrode head 10, and exerts a downward squeezing force on the reference electrode head 10, thereby increasing the sealing between the reference electrode head 10 and the placement sleeve 9. The bottom of the docking seat 1 is provided with an escape groove 43, and the free ends of the gold working electrode wire 30 and the gold counter electrode wire 31 both pass through the escape groove 43 and extend outside; like Figure 2 As shown, mounting grooves 44 are provided at the four corners of the bottom of the docking seat 1, and heightening legs 45 are rotatably connected to the plurality of mounting grooves 44. The heightening legs 45 can be set to increase the height of the bottom of the docking seat 1 to prevent the docking seat 1 from squeezing the gold working electrode wire 30 and the gold counter electrode wire 31, thereby preventing the gold working electrode wire 30 and the gold counter electrode wire 31 from being damaged.

[0035] In this embodiment, the specific operation process is as follows: S1: During installation, the working electrode module 3 is placed on the docking seat 1, and the two side surfaces of the working electrode module 3 are respectively attached to one side of the inner wall of the docking seat 1 and the positioning prompt plate 40 to complete the positioning.

[0036] S2: Then place the tetrafluoroethylene gasket 4 on the upper surface of the working electrode module 3, align the positioning through hole 34 with the positioning socket 33, and then insert the positioning rod 32 at the bottom of the reference electrode module 2 into the positioning through hole 34 and the positioning socket 33, clamp the tetrafluoroethylene gasket 4 by the reference electrode module 2 and the working electrode module 3, and limit the position of the tetrafluoroethylene gasket 4 by the positioning rod 32.

[0037] S3: Then thread the installation sleeve 9 into the liquid inlet chamber 6, and add saturated potassium chloride solution into the installation sleeve 9, then place the reference electrode head 10 connected with the Ag / AgCl rod 14 on the top of the installation sleeve 9, so that the Ag / AgCl rod 14 is immersed in the saturated potassium chloride solution, and complete the installation of the reference electrode assembly.

[0038] S4: Insert the first connecting screw rod 17 into the first docking port 15, and then rotate the first screwing portion 19. The first screwing portion 19 drives the first connecting screw rod 17 to rotate, and then screws the first connecting screw rod 17 into the first docking port 15 to complete the installation of the liquid inlet structure.

[0039] S5: Insert the second connecting screw rod 23 into the second docking port 21, and then rotate the second screwing portion 25. The second screwing portion 25 drives the second connecting screw rod 23 to rotate, and then screw the second connecting screw rod 23 into the second docking port 21 to complete the installation of the drainage structure.

[0040] S6: After all parts are installed, rotate the two bolt presses 36 clockwise, and the two bolt presses 36 press the balance plate 35 downward. The balance plate 35 slides downward along the spring slot 37 through the slider 38 so that the bottom of the balance plate 35 contacts the top of the reference electrode module 2, and squeezes the reference electrode module 2. Then rotate the reference electrode press 42 clockwise to move the reference electrode press 42 downward. The bottom end thread of the reference electrode press 42 passes through the docking seat 1 and contacts the upper surface of the reference electrode head 10, and applies a downward squeezing force to the reference electrode head 10, thereby increasing the sealing between the reference electrode head 10 and the mounting sleeve 9.

[0041] S7: Connect the reference electrode wire 13, the gold working electrode wire 30 and the gold counter electrode wire 31 to the electrical signal detection system, connect the introduction tube 18 to the sample outlet of the hypochlorous acid disinfectant water production line through a pulsation-free pump, and connect the outlet tube 24 to the recovery container before starting the detection. The hypochlorous acid disinfectant water to be detected flows into the introduction tube 18 and sequentially flows through the first docking port 15, the liquid inlet cavity 6, the thin layer channel 5, the liquid discharge groove 8 and finally flows out from the outlet tube 24. The entire detection process is isolated from the outside world to reduce errors.

[0042] Embodiment 2 like Figure 1-Figure 20As shown, this embodiment is improved on the basis of the first embodiment as follows: Further, as Figure 1 and Fig.14 As shown, a cleaning structure 47 is installed on one side of the docking seat 1, and the cleaning structure 47 includes a cleaning shell 48 and an acid path cleaning component 49 and an alkali path cleaning component 50 installed in the cleaning shell 48, and the alkali path cleaning component 50 is located directly below the acid path cleaning component 49; like Figure 15-17 As shown, the acid path cleaning assembly 49 includes an acid storage box 51, a docking module 52, a torsion spring 53 and a locking clamp 54. A threaded rod 55 is rotatably connected in the acid storage box 51. A first push plate 56 is threadedly engaged on the threaded rod 55. The side wall of the first push plate 56 is slidably connected to the inner wall of the acid storage box 51. A docking rod 57 is fixedly connected to the bottom of the first push plate 56. The bottom of the docking rod 57 slides through the acid storage box 51 and extends outside, and a cross-shaped docking module 52 is fixedly connected at the free end. Two groups of docking rods 57 are provided and symmetrically distributed on the top of the docking module 52. Adjustment ports 59 are provided at both ends of the connection module 52, and torsion springs 53 are rotatably connected in the two adjustment ports 59. A limiting connecting rod 68 is fixedly connected to one side of the locking clamp 54, and both ends of the limiting connecting rod 68 are rotatably connected to the adjustment port 59; the locking clamp 54 is rotatably connected to the adjustment port 59 through the limiting connecting rod 68, and both ends of the torsion spring 53 are respectively fixedly connected to the inner wall of the adjustment port 59 and the locking clamp 54. A push-up portion 60 is symmetrically provided at the bottom of the acid storage box 51, and the top end of the locking clamp 54 is in contact with the push-up portion 60, and a clamping portion 61 is provided at the bottom end of the locking clamp 54; like Fig.18 As shown, the alkali circuit cleaning assembly 50 includes an alkali storage box 62 and a second push plate 63, the side wall of the second push plate 63 is slidably connected to the inner wall of the alkali storage box 62, a return spring 64 is fixedly connected to the bottom of the inner cavity of the alkali storage box 62, the top of the return spring 64 is fixedly connected to the second push plate 63, and the top of the second push plate 63 is fixedly connected to a docking connecting rod 65, the top of the docking connecting rod 65 slides through the alkali storage box 62 and extends outside, and both sides of the docking connecting rod 65 are provided with a clamping groove 66 adapted to the clamping portion 61; like Fig.14 and Fig.19 As shown, the acid storage box 51 and the alkali storage box 62 are connected to the same single-pass assembly through the first row of pipes 46 and the second row of pipes 76 respectively; The docking seat 1 is provided with a positioning structure for fixing the positions of the reference electrode module 2 and the working electrode module 3; The single-pass component includes a flow tube 69, which is slidably connected to a sliding block 70 inside. The bottom of the inner cavity of the acid storage box 51 is fixedly connected to the top of the inner cavity of the flow tube 69 through the first row of tubes 46; the top of the inner cavity of the alkali storage box 62 is fixedly connected to the bottom of the inner cavity of the flow tube 69 through the second row of tubes 76. One side of the flow tube 69 is connected to a docking sleeve 71, and the free end of the docking sleeve 71 is provided with a socket 67. The end of the introduction tube 18 away from the liquid inlet cavity 6 is detachably inserted into the socket 67.

[0043] Further, such as Figure 4 As shown, a rotating motor 72 is installed on the acid storage box 51, and the rotating motor 72 is connected to the external control terminal for signal transmission, and the top of the threaded rod 55 slides through the acid storage box 51 and is fixedly connected to the rotating shaft of the rotating motor 72; like Fig. 20 As shown, a push-type stopper 73 and a push-type direction adjuster 74 connected to the rotating motor 72 for signal transmission are respectively installed on the top and bottom of one side of the inner cavity of the acid storage box 51; like Fig.14 As shown, the acid storage box 51 is connected to the acid adding box 75 through a one-way pump, and the alkali storage box 62 is connected to the alkali adding box 58 through a one-way pump.

[0044] In the present invention, two cleaning methods for the reference electrode module 2, the tetrafluoroethylene gasket 4 and the working electrode module 3 are provided according to two different usage scenarios: When only a single test is required: S10: After a single test is completed, the reference electrode wire 13, the gold working electrode wire 30 and the gold counter electrode wire 31 are disconnected from the electrical signal detection system, and then the reference electrode pressure head 42 is rotated counterclockwise to reset the reference electrode pressure head 42 and stop pressing the reference electrode head 10, and then the two bolt pressure heads 36 are rotated counterclockwise, and the two bolt pressure heads 36 move upward and the squeezing force on the balance plate 35 disappears. At this time, the spring 39 in the stretched state will shrink and reset, and drive the balance plate 35 to move upward and reset through the slider 38, so that the balance plate 35 stops squeezing the reference electrode module 2, and then the staff disassembles the reference electrode assembly, working electrode assembly, liquid inlet structure, and liquid discharge structure on the reference electrode module 2, and then separates the reference electrode module 2, the tetrafluoroethylene gasket 4 and the working electrode module 3 for separate cleaning.

[0045] When continuous testing is required: S20: When cleaning, disconnect the reference electrode wire 13, the gold working electrode wire 30 and the gold counter electrode wire 31 from the electrical signal detection system, separate the introduction tube 18 from the pulsation-free pump, connect the socket 67 to the introduction tube 18, turn on the rotary motor 72, and the rotary motor 72 drives the threaded rod 55 to rotate clockwise through the rotating shaft. Under the action of the threaded engagement, the first push plate 56 slides downward and discharges the acid cleaning solution in the acid storage box 51 into the flow tube 69 through the first row of pipes 46. At this time, the acidic cleaning liquid presses the sliding block 70 in the flow tube 69 downward, so that the sliding block 70 slides to the bottom of the inner cavity of the flow tube 69, thereby blocking the second row of pipes 76, and the acidic cleaning liquid flows into the thin layer channel 5 through the docking sleeve 71 and the liquid inlet cavity 6, thereby removing the inorganic dirt and negatively charged acid radical ions on the surface of the gold working electrode 27. The cleaned dirt will flow into the drainage groove 8 together with the flow of the acidic cleaning liquid, and finally flow out from the outlet pipe 24 to the recovery container; When the first push plate 56 slides downward, the docking module 52 and the two locking clamps 54 are driven downward at the same time through the docking rod 57. When the locking clamps 54 move downward until they contact the top of the docking link 65, as the first push plate 56 continues to slide downward, the docking link 65 will apply a top force to the clamping parts 61 at the bottom of the two locking clamps 54, thereby causing the two locking clamps 54 to rotate outward. At this time, the two torsion springs 53 are compressed. When the clamping parts 61 at the bottom of the locking clamps 54 move into the clamping grooves 66, the top force applied by the docking link 65 to the two clamping parts 61 disappears. At this time, the two torsion springs 53 in the compressed state are stretched and reset, thereby resetting the two locking clamps 54. At this time, the two clamping parts 61 will move into the corresponding clamping grooves 66, thereby causing the two locking clamps 54 to clamp the docking link 65. Fig. 20 As shown, at this time, the first push plate 56 just slides to the bottom of the inner cavity of the acid storage box 51 (that is, the acid cleaning work is completed), and at the same time, the press-type direction adjuster 74 is squeezed. At this time, the press-type direction adjuster 74 will control the rotating shaft of the rotating motor 72 to drive the threaded rod 55 to rotate counterclockwise, and the first push plate 56 begins to slide upward, and at the same time drives the docking module 52 and the two locking clamps 54 to move upward through the docking rod 57. During the upward movement, the docking connecting rod 65 will drive the second push plate 63 to pass the alkaline cleaning solution in the alkali storage box 62 through The second row of pipes 76 is discharged into the flow pipe 69. At this time, the alkaline cleaning liquid will push the sliding block 70 located at the bottom of the inner cavity of the flow pipe 69 upward, thereby blocking the first row of pipes 46. The alkaline cleaning liquid flows into the thin layer channel 5 through the docking sleeve 71 and the liquid inlet cavity 6, thereby removing the organic dirt on the surface of the gold working electrode 27 and the metal ions attached to the surface of the gold working electrode 27. The cleaned dirt will flow into the drainage groove 8 together with the flow of the alkaline cleaning liquid, and finally flow out from the outlet pipe 24 to the recovery container; When the first push plate 56 moves upward, the interior of the acid storage box 51 is in a negative pressure state. At this time, the acid adding box 75 will replenish the acid cleaning liquid into the acid storage box 51 through the one-way pump. At the same time, when the second push plate 63 moves upward, the return spring 64 is stretched. As the first push plate 56 moves upward, the two locking clamps 54 will also move upward synchronously. When the tops of the two locking clamps 54 contact the push-up part 60 arranged at the bottom of the acid storage box 51, and as the two locking clamps 54 continue to move upward, the push-up part 60 will squeeze the tops of the two locking clamps 54. At this time, the two locking clamps 54 are squeezed outward. When the first push plate 56 moves upward to the top of the inner cavity of the acid storage box 51 (i.e., the alkaline cleaning work is completed), the clamping portion 61 at the bottom of the locking clamping plate 54 will be completely separated from the clamping groove 66, thereby canceling the clamping of the docking connecting rod 65. At this time, the restoring spring 64 in the stretched state will shrink and reset, and at the same time pull the second push plate 63 and the docking connecting rod 65 back to their original position. During the reset process, the interior of the alkali storage box 62 is in a negative pressure state. At this time, the alkali adding box 58 will replenish the alkali cleaning solution into the alkali storage box 62 through the one-way pump and wait for the next work; When the first push plate 56 moves upward to the top of the inner cavity of the acid storage box 51, the first push plate 56 squeezes the push-type stopper 73, and the push-type stopper 73 sends a stop command to the rotating motor 72. At this time, the rotating shaft of the rotating motor 72 stops rotating, and the acid path cleaning component 49 and the alkali path cleaning component 50 are also reset (that is, the entire cleaning work is completed). In the present invention, the dirt on the surface of the gold working electrode 27 is removed by the cooperation of the acid path cleaning component 49 and the alkali path cleaning component 50, ensuring that the electrochemical activity on the surface of the gold working electrode 27 remains stable for a long time during the measurement process, thereby ensuring the stability and accuracy of the detection data.

[0046] After cleaning, the socket 67 is separated from the introduction tube 18, and the introduction tube 18 is connected to the pulsation-free pump, and then the reference electrode wire 13, the gold working electrode wire 30 and the gold counter electrode wire 31 are connected to the electrical signal detection system to start the next detection; In the initial stage of detection, the hypochlorous acid disinfectant to be detected will flow into the inlet pipe 18 and push the alkaline cleaning liquid in the inlet pipe 18, the first docking port 15, the liquid inlet cavity 6, the thin layer channel 5, and the drainage groove 8 to flow out from the outlet pipe 24, so that the residual alkaline cleaning liquid is discharged.

[0047] However, the working principles and wiring methods of the gold working electrode 27, gold counter electrode 28, electrical signal detection system, rotating motor 72, push-type stopper 73 and push-type direction adjuster 74 are commonplace and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0048] The above different embodiments can be combined, replaced and used in conjunction with each other.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thin-layer channel electrochemical sensor for online detection of effective chlorine concentration, characterized in that: It comprises a docking seat (1), a reference electrode module (2) and a working electrode module (3), wherein the working electrode module (3) is mounted on the docking seat (1); A tetrafluoroethylene gasket (4) is placed on the upper surface of the working electrode module (3), the reference electrode module (2) is mounted on the working electrode module (3), and the bottom of the reference electrode module (2) is in contact with the tetrafluoroethylene gasket (4), and the tetrafluoroethylene gasket (4) is provided with a thin layer channel (5); The reference electrode module (2) is provided with a liquid inlet cavity (6), the bottom of the reference electrode module (2) is provided with a reference electrode hole (7) connected to the liquid inlet cavity (6), the top of the reference electrode module (2) is provided with a reference electrode assembly connected to the liquid inlet cavity (6), one side of the reference electrode module (2) is provided with a liquid inlet structure connected to the liquid inlet cavity (6), the reference electrode module (2) is further provided with a liquid drainage groove (8), the top of the liquid drainage groove (8) is provided with a liquid drainage structure, and the working electrode assembly connected to the reference electrode hole (7) is provided in the working electrode module (3); The liquid inlet structure comprises a first connecting screw rod (17), the first connecting screw rod (17) being threadedly connected to the reference electrode module (2), the other end of the first connecting screw rod (17) being fixedly connected to a first screwing portion (19), an introduction tube (18) being fixedly embedded inside the first connecting screw rod (17), one end of the introduction tube (18) passing through the first connecting screw rod (17) and being connected to the liquid inlet chamber (6), and the other end of the introduction tube passing through the first connecting screw rod (17) and the first screwing portion (19) and extending outside; The reference electrode hole (7), the working electrode assembly, and the liquid drainage groove (8) are all connected to the thin layer channel (5); The docking seat (1) is provided with a positioning structure for fixing the positions of the reference electrode module (2) and the working electrode module (3); A cleaning structure (47) is installed on one side of the docking seat (1), the cleaning structure (47) comprising a cleaning shell (48) and an acid path cleaning component (49) and an alkali path cleaning component (50) installed in the cleaning shell (48), the acid path cleaning component (49) and the alkali path cleaning component (50) being connected to the liquid inlet structure via the same single-pass component.

2. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 1, characterized in that: The alkaline path cleaning component (50) is located directly below the acid path cleaning component (49); The acid path cleaning assembly (49) comprises an acid storage box (51), a docking module (52), a torsion spring (53) and a locking clamp (54); a threaded rod (55) is rotatably connected to the acid storage box (51); a first push plate (56) is threadedly engaged on the threaded rod (55); a side wall of the first push plate (56) is slidably connected to an inner wall of the acid storage box (51); a docking rod (57) is fixedly connected to the bottom of the first push plate (56); the bottom of the docking rod (57) slides through the acid storage box (51) and extends outside, and a cross-shaped docking rod (57) is fixedly connected to the free end. A module (52), wherein both ends of the docking module (52) are provided with adjustment openings (59), torsion springs (53) are rotatably connected to the two adjustment openings (59), a locking clamping plate (54) is rotatably connected to the adjustment openings (59), both ends of the torsion spring (53) are respectively fixedly connected to the inner wall of the adjustment opening (59) and the locking clamping plate (54), a push-up portion (60) is symmetrically provided at the bottom of the acid storage box (51), the top end of the locking clamping plate (54) is in contact with the push-up portion (60), and a clamping portion (61) is provided at the bottom end of the locking clamping plate (54); The alkali path cleaning assembly (50) comprises an alkali storage box (62) and a second push plate (63), the side wall of the second push plate (63) being slidably connected to the inner wall of the alkali storage box (62), a return spring (64) being fixedly connected to the bottom of the inner cavity of the alkali storage box (62), the top of the return spring (64) being fixedly connected to the second push plate (63), the top of the second push plate (63) being fixedly connected to a docking connecting rod (65), the top of the docking connecting rod (65) slidingly passing through the alkali storage box (62) and extending outside, and two sides of the docking connecting rod (65) being provided with clamping grooves (66) matching the clamping portion (61); The acid storage box (51) and the alkali storage box (62) are connected to the same single-pass component via a first row of pipes (46) and a second row of pipes (76), respectively.

3. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 2, characterized in that: The docking rods (57) are provided in two groups and are symmetrically distributed on the top of the docking module (52); A limiting connecting rod (68) is fixedly connected to one side of the locking clamping plate (54), and two ends of the limiting connecting rod (68) are rotatably connected to the adjustment port (59); The single-pass component comprises a flow tube (69), the interior of which is slidably connected with a sliding block (70); the bottom of the inner cavity of the acid storage box (51) is fixedly connected to the top of the inner cavity of the flow tube (69) via a first row of tubes (46); the top of the inner cavity of the alkali storage box (62) is fixedly connected to the bottom of the inner cavity of the flow tube (69) via a second row of tubes (76); one side of the flow tube (69) is connected to a docking sleeve (71); a free end of the docking sleeve (71) is provided with a socket (67); an end of the introduction tube (18) away from the liquid inlet cavity (6) is detachably plugged into the socket (67).

4. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 2, characterized in that: A rotating motor (72) is mounted on the acid storage box (51), the rotating motor (72) is connected to the external control terminal for signal transmission, and the top of the threaded rod (55) slides through the acid storage box (51) and is fixedly connected to the rotating shaft of the rotating motor (72); A push-type stopper (73) and a push-type direction adjuster (74) connected to the rotating motor (72) for signal transmission are respectively installed on the top and bottom of one side of the inner cavity of the acid storage box (51); The acid storage box (51) is connected to an acid adding box (75) via a one-way pump, and the alkali storage box (62) is connected to an alkali adding box (58) via a one-way pump.

5. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 1, characterized in that: The reference electrode assembly comprises a placement sleeve (9) and a reference electrode head (10); the liquid inlet cavity (6) is T-shaped; the placement sleeve (9) is hollow inside and has openings at both ends; the placement sleeve (9) is threadedly connected to the liquid inlet cavity (6); and a ceramic permeable membrane (12) is installed at the bottom of the placement sleeve (9); A reference electrode head (10) is arranged at the top of the placement sleeve (9), a reference electrode wire (13) is arranged at the top of the reference electrode head (10), the free end of the reference electrode wire (13) is electrically connected to an external electrical signal detection system, an Ag / AgCl rod (14) is connected to the bottom of the reference electrode head (10), the free end of the Ag / AgCl rod (14) extends in the placement sleeve (9), a reference electrode head sealing ring (11) is arranged at the bottom of the reference electrode head (10), and the bottom of the reference electrode head sealing ring (11) abuts against the horizontal end of the T-shaped liquid inlet cavity (6).

6. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 1, characterized in that: A first port (15) communicating with the liquid inlet cavity (6) is provided on one side of the reference electrode module (2), and a first sealing ring (16) is attached to the inner wall of the first port (15); One end of the first connecting screw rod (17) is threadedly connected to the first docking port (15) and the end thereof abuts against the first sealing ring (16); a second sealing ring (20) is embedded on a side of the first screwing portion (19) close to the reference electrode module (2); and one end of the introduction tube (18) away from the liquid inlet chamber (6) is connected to a sample outlet of a hypochlorous acid disinfectant water production line via a pulsation-free pump.

7. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 5, characterized in that: The drainage groove (8) is provided with a second docking port (21), the inner wall of the second docking port (21) is provided with a third sealing ring (22), the drainage structure comprises a second connecting screw rod (23), one end of the second connecting screw rod (23) is threadedly connected to the second docking port (21) and the end thereof is in contact with the third sealing ring (22), a guide tube (24) is fixedly embedded inside the second connecting screw rod (23), one end of the guide tube (24) passes through the second connecting screw rod (23) and is in communication with the drainage groove (8); The other end of the second connecting screw rod (23) is fixedly connected to a second screwing portion (25), a fourth sealing ring (26) is embedded on a side of the second screwing portion (25) close to the reference electrode module (2), and the other end of the outlet tube (24) passes through the second screwing portion (25) and extends outside, with the end portion being connected to an external recovery container.

8. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 7, characterized in that: The working electrode assembly comprises a gold working electrode (27) and a gold counter electrode (28). The working electrode module (3) is provided with two embedding holes (29). The gold working electrode (27) and the gold counter electrode (28) are installed in the embedding holes (29), and the upper surfaces of the gold working electrode (27) and the gold counter electrode (28) are flush with the upper surfaces of the embedding holes (29). The bottom of the gold working electrode (27) is provided with a gold working electrode wire (30), and the bottom of the gold counter electrode (28) is provided with a gold counter electrode wire (31). The free ends of the gold working electrode wire (30) and the gold counter electrode wire (31) both penetrate the working electrode module (3) and extend outside. The gold working electrode wire (30) and the gold counter electrode wire (31) are both electrically connected to an external electrical signal detection system.

9. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 8, characterized in that: A plurality of positioning rods (32) are installed at the bottom of the reference electrode module (2); a positioning socket (33) corresponding to the plurality of positioning rods (32) is provided on the upper surface of the working electrode module (3); a positioning through-hole (34) corresponding to the plurality of positioning rods (32) is provided on the tetrafluoroethylene gasket (4); and free ends of the plurality of positioning rods (32) pass through the positioning through-holes (34) and are plugged into the positioning sockets (33); The thickness of the tetrafluoroethylene gasket (4) is 25 μm; The upper surface of the gold working electrode (27) is circular and has a diameter of 1 mm; The gold working electrode (27) is located directly below the reference electrode hole (7).

10. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 9, characterized in that: The positioning structure comprises a balance plate (35) and two bolt pressure heads (36); two spring grooves (37) are provided on one side of the inner wall of the docking seat (1); two sliders (38) are provided on one side of the balance plate (35); the sliders (38) are slidably connected in the spring grooves (37); a spring (39) is provided in each of the two spring grooves (37); one end of the spring (39) is fixedly connected to the slider (38) and the other end is fixedly connected to the top of the inner cavity of the spring groove (37); The top of the docking seat (1) is threadedly connected to two bolt pressure heads (36), and the bottom ends of the two bolt pressure heads (36) are threadedly passed through the docking seat (1) and abut against the upper surface of the balance plate (35); A positioning prompt plate (40) is provided at the bottom of the inner wall of the docking seat (1), and the positioning prompt plate (40) is in contact with the working electrode module (3); The balancing plate (35) is provided with two avoidance holes (41), the reference electrode head (10) is located in one of the avoidance holes (41), and the second screwing portion (25) is located in the other avoidance hole (41); the top of the docking seat (1) is also threadedly connected with a reference electrode pressure head (42), and the bottom end of the reference electrode pressure head (42) is threadedly passed through the docking seat (1) and is in contact with the upper surface of the reference electrode head (10); The bottom of the docking seat (1) is provided with an avoidance groove (43), and the free ends of the gold working electrode wire (30) and the gold counter electrode wire (31) both pass through the avoidance groove (43) and extend outside; The four corners of the bottom of the docking seat (1) are each provided with a mounting groove (44), and a plurality of the mounting grooves (44) are rotatably connected to a heightening support leg (45).

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