A thin-layer channel electrochemical sensor for on-line detection of available chlorine concentration

Abstract

The present invention belongs to the technical field of electrochemical sensors, and particularly relates to a thin-layer channel electrochemical sensor for on-line detection of effective chlorine concentration, which includes a docking seat, a reference electrode module, a working electrode module, an acid path cleaning component, and an alkaline path cleaning component. The alkaline path cleaning component is located directly below the acid path cleaning component. In view of the problem in the prior art that after the working electrode and the reaction cup are cleaned, it is necessary to re-add the electrolyte. The whole process is cumbersome and requires a large amount of electrolyte, reducing the detection efficiency and speed, and at the same time increasing the detection cost. In the present invention, through the cooperation of the acid path cleaning component and the alkaline path cleaning component, cleaning and removing impurities can be achieved without disassembly, reducing the total time required for continuous detection, thereby improving the detection efficiency. At the same time, the staff can select different cleaning methods according to the actual number of detections to improve work efficiency.

Description

Technical Field

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

[0002] Hypochlorous acid disinfectants have strong bactericidal ability, fast speed, broad bactericidal spectrum and good safety, and have attracted attention in the fields of medical and health, food processing, planting and breeding, etc. In recent years, they have been rapidly applied and promoted, and have become the best choice to replace traditional disinfectants such as 84 solution, alcohol, peracetic acid, and hydrogen peroxide. When on-line detecting the concentration of hypochlorous acid disinfectants, the effective chlorine concentration of hypochlorous acid is evaluated by measuring the oxidation-reduction potential (ORP) of the solution. However, the oxidation-reduction potential value changes with the change of the solution pH value, resulting in the uncertainty of the on-line detection value. And when detecting the effective chlorine concentration, the liquid to be detected is added to the reaction cup for detection. The liquid to be detected exposed to the air for a long time will cause an increase in experimental error. In order to reduce the resistance R value of the solution to be detected, an electrolyte also needs to be added to the reaction cup to reduce the resistance. But 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. However, after the cleaning is completed, the electrolyte needs to be added again. The whole process is cumbersome and requires a large amount of electrolyte, reducing the detection efficiency and speed, and at the same time increasing the detection cost. Summary of the Invention

[0003] (I) Technical Problems to be Solved

[0004] The present invention provides a thin-layer channel electrochemical sensor for on-line detection of the effective chlorine concentration to solve the following problems:

[0005] 1. The liquid to be detected exposed to the air for a long time will cause an increase in experimental error;

[0006] 2. After the working electrode and the reaction cup are cleaned, the electrolyte needs to be added again. The whole process is cumbersome and requires a large amount of electrolyte, reducing the detection efficiency and speed, and at the same time increasing the detection cost.

[0007] (II) Technical Content

[0008] To achieve the above object, the present invention provides the following technical solution:

[0009] A thin-layer channel electrochemical sensor for on-line detection of the effective chlorine concentration, including a docking seat, a reference electrode module and a working electrode module, and the working electrode module is installed on the docking seat;

[0010] 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. The tetrafluoroethylene gasket is provided with a thin-layer channel;

[0011] The reference electrode module is provided with a liquid inlet cavity. The bottom of the reference electrode module is provided with a reference electrode hole communicating with the liquid inlet cavity. The top of the reference electrode module is installed with a reference electrode assembly communicating with the liquid inlet cavity. One side of the reference electrode module is installed with a liquid inlet structure communicating with the liquid inlet cavity. The reference electrode module is also provided with a liquid discharge through groove, and a liquid discharge structure is installed at the top of the liquid discharge through groove. A working electrode assembly communicating with the reference electrode hole is installed in the working electrode module;

[0012] The liquid inlet structure includes a first continuous screw rod, which is threadedly connected to the reference electrode module. The other end of the first continuous screw rod is fixedly connected with a first screwing part. An inlet pipe is fixedly embedded inside the first continuous screw rod. One end of the inlet pipe penetrates through the first continuous screw rod and communicates with the liquid inlet cavity, and the other end penetrates through the first continuous screw rod and the first screwing part and extends outside;

[0013] The reference electrode hole, the working electrode assembly, and the liquid discharge through groove are all communicated with the thin layer channel;

[0014] The docking seat is provided with a positioning structure for fixing the positions of the reference electrode module and the working electrode module;

[0015] A cleaning structure is installed on one side of the docking seat. The cleaning structure includes a cleaning housing and an acid path cleaning component and an alkali path cleaning component installed in the cleaning housing. The acid path cleaning component and the alkali path cleaning component are communicated with the liquid inlet structure through the same one-way component.

[0016] Further, the alkali path cleaning component is located directly below the acid path cleaning component;

[0017] The acid path cleaning component includes 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 with the threaded rod. The side wall of the first push plate is slidably connected to the inner wall of the acid storage box. The bottom of the first push plate is fixedly connected with a docking rod. The bottom of the docking rod slidably penetrates through the acid storage box and extends outside, and the free end is fixedly connected with a cross-shaped docking module. Adjusting ports are provided at both ends of the docking module. Torsion springs are rotatably connected in both adjusting ports. A locking splint is rotatably connected in the adjusting port. Both ends of the torsion spring are fixedly connected with the inner wall of the adjusting port and the locking splint respectively. The bottom of the acid storage box is symmetrically provided with a jacking part. The top end of the locking splint is in contact with the jacking part, and a clamping part is provided at the bottom end of the locking splint;

[0018] The alkali path cleaning assembly includes 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, and the top of the reset spring is fixedly connected to the second push plate. The top of the second push plate is fixedly connected with a docking connecting rod. The top of the docking connecting rod slidably penetrates through the alkali storage box and extends outside. Opposite clamping grooves adapted to the opposite clamping parts are formed on both sides of the docking connecting rod;

[0019] The acid storage box and the alkali storage box are respectively communicated with the same one-way component through a first drain pipe and a second drain pipe.

[0020] Further, there are two sets of docking rods, which are symmetrically distributed on the top of the docking module;

[0021] One side of the locking clamping plate is fixedly connected with a limiting connecting rod, and both ends of the limiting connecting rod are rotatably connected to the adjusting opening;

[0022] The one-way component includes a flow pipe. A sliding plug block is slidably connected inside the flow pipe. The bottom of the inner cavity of the acid storage box is fixedly communicated with the top of the inner cavity of the flow pipe through a first drain pipe; the top of the inner cavity of the alkali storage box is fixedly communicated with the bottom of the inner cavity of the flow pipe through a second drain pipe. One side of the flow pipe is communicated with a docking sleeve, and a socket is arranged at the free end of the docking sleeve. The end of the inlet pipe far from the liquid inlet cavity is detachably inserted into the socket.

[0023] Further, a rotating motor is installed on the acid storage box. The rotating motor is in signal transmission connection with an external control terminal. The top of the threaded rod slidably penetrates through the acid storage box and is fixedly connected with the rotating shaft of the rotating motor;

[0024] A push-button stopper and a push-button aligner in signal transmission connection with the rotating motor are respectively installed at the top and bottom of one side of the inner cavity of the acid storage box;

[0025] The acid storage box is communicated with an acid adding tank through a one-way pump, and the alkali storage box is communicated with an alkali adding tank through a one-way pump.

[0026] Further, 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 the 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;

[0027] A reference electrode head is arranged at the top end 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 an external electrical signal detection system. The bottom of the reference electrode head is connected with an Ag / AgCl rod. The free end of the Ag / AgCl rod extends into the placement sleeve. A reference electrode head seal ring is arranged at the bottom of the reference electrode head. The bottom of the reference electrode head seal ring abuts against the horizontal end of the T-shaped liquid inlet cavity.

[0028] Further, a first pair of interfaces communicating with the liquid inlet chamber are formed 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;

[0029] One end of the first continuous screw rod is threadedly connected in the first pair of interfaces and its end abuts against the first sealing ring. A second sealing ring is embedded on the side of the first screwing part close to the reference electrode module. The end of the inlet pipe far from the liquid inlet chamber is connected to the sampling outlet of the hypochlorous acid disinfection water production line through a pulsation-free pump.

[0030] Further, the liquid discharge through groove is provided with a second pair of interfaces, and a third sealing ring is attached to the inner wall of the second pair of interfaces. The liquid discharge structure includes a second continuous screw rod. One end of the second continuous screw rod is threadedly connected in the second pair of interfaces and its end abuts against the third sealing ring. A lead-out pipe is fixedly embedded inside the second continuous screw rod. One end of the lead-out pipe penetrates through the second continuous screw rod and communicates with the liquid discharge through groove;

[0031] The other end of the second continuous screw rod is fixedly connected with a second screwing part. 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 lead-out pipe penetrates through the second screwing part and extends outside, and its end is connected to an external recovery container.

[0032] Further, the working electrode assembly includes a gold working electrode and a gold counter electrode. Two embedding holes are formed 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 surface 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 penetrate through the working electrode module and extend outside, and both the gold working electrode wire and the gold counter electrode wire are electrically connected to an external electrical signal detection system.

[0033] Further, a plurality of positioning rods are installed at the bottom of the reference electrode module. Positioning sockets corresponding to the plurality of positioning rods one by one are formed on the upper surface of the working electrode module. Positioning through holes corresponding to the plurality of positioning rods one by one are formed on the polytetrafluoroethylene gasket. The free ends of the plurality of positioning rods pass through the positioning through holes and are inserted into the positioning sockets;

[0034] The thickness of the polytetrafluoroethylene gasket is 25 μm;

[0035] The upper surface of the gold working electrode is circular and has a diameter of 1 mm;

[0036] The gold working electrode is located directly below the reference electrode hole.

[0037] Further, the positioning structure includes a balance plate and two bolt heads. On one side of the inner wall of the docking seat, two spring grooves are provided. On one side of the balance plate, two sliders are provided. The sliders are slidably connected in the spring grooves. Springs are provided in both 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;

[0038] Two bolt heads are threadedly connected to the top of the docking seat. The bottom ends of the two bolt heads threadedly penetrate through the docking seat and abut against the upper surface of the balance plate;

[0039] A positioning tip plate is provided at the bottom of the inner wall of the docking seat, and the positioning tip plate is in contact with the working electrode module;

[0040] The balance plate is provided with two avoidance holes. The reference electrode head is located in one avoidance hole, and the second screwing part is located in the other avoidance hole. A reference electrode press head is also threadedly connected to the top of the docking seat. The bottom end of the reference electrode press head threadedly penetrates through the docking seat and contacts the upper surface of the reference electrode head;

[0041] An avoidance groove is provided at the bottom of the docking seat. The free ends of the gold working electrode wire and the gold counter electrode wire both penetrate through the avoidance groove and extend outside;

[0042] Mounting grooves are provided at the four corners of the bottom of the docking seat, and heightening legs are rotatably connected in the multiple mounting grooves.

[0043] (III) Beneficial Effects

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0045] First, in the present invention, the hypochlorous acid disinfectant water to be detected flows in from the inlet pipe and sequentially flows through the first docking port, the liquid inlet cavity, the thin layer channel, the liquid discharge through groove and finally flows out from the outlet pipe. The whole detection process is isolated from the outside world, reducing errors.

[0046] Second, in the present invention, by setting the thickness of the polytetrafluoroethylene gasket to 25 μm, the distance between the reference electrode hole and the gold working electrode is accurately controlled at 25 μm, and at the same time, the thickness of the thin layer channel is accurately 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, and further achieving the purpose of accurately measuring the available chlorine concentration without adding electrolytes.

[0047] Third, in the present invention, through the cooperation of the acid path cleaning component and the alkali path cleaning component, cleaning and removing impurities can be achieved without disassembly, reducing the total time required for continuous detection, thereby improving the detection efficiency.

[0048] IV. In the present invention, the staff can select different cleaning methods according to the actual number of detections, improving work efficiency.

[0049] V. In the present invention, the first sealing ring is provided to isolate the first pair of interfaces from the liquid inlet cavity, ensuring the airtightness inside the liquid inlet cavity. At the same time, it can also prevent the solution to be measured from flowing into the first pair of interfaces, resulting in an increase in the error of chlorine concentration detection. The second sealing ring is provided to further ensure the airtightness inside the liquid inlet cavity.

[0050] VI. In the present invention, the third sealing ring is provided to prevent hypochlorous acid disinfectant water from flowing into the second pair of interfaces, thus affecting the discharge of hypochlorous acid disinfectant water from the outlet pipe. The fourth sealing ring is provided to further ensure the airtightness inside the liquid inlet cavity.

[0051] VII. In the present invention, by rotating two bolt heads to drive the balance plate to move, it can be ensured that when the balance plate moves to any position, under the action of the bolt heads and the spring, the balance plate will not reset or move downward automatically, enabling the staff to free their hands to pass the reference electrode wire and the other end of the outlet pipe through the avoidance hole.

[0052] VIII. In the present invention, the heightening legs are provided to increase the height of the bottom of the docking seat, preventing the docking seat from squeezing the gold working electrode wire and the gold counter electrode wire, resulting in damage to the gold working electrode wire and the gold counter electrode wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is the three-dimensional schematic diagram of the whole of the present invention;

[0054] Figure 2 is the bottom view of the whole of the present invention;

[0055] Figure 3 is the sectional view of the reference electrode module, the working electrode module and the polytetrafluoroethylene gasket in the present invention;

[0056] Figure 4 is the exploded schematic diagram of the reference electrode module, the working electrode module and the polytetrafluoroethylene gasket in the present invention;

[0057] Figure 5 is the sectional view of the reference electrode module in the present invention;

[0058] Figure 6 is Figure 5 the partial enlarged schematic diagram at A in

[0059] Figure 7 is the schematic diagram of the liquid inlet structure in the present invention;

[0060] Figure 8 isFigure 5 Partial enlarged schematic view at position B in the [device / component name];

[0061] Figure 9 Schematic view of the liquid discharge structure in the present invention;

[0062] Figure 10 Sectional view of the working electrode module in the present invention;

[0063] Figure 11 Sectional view of the reference electrode assembly in the present invention;

[0064] Figure 12 Schematic view of the positioning structure in the present invention;

[0065] Figure 13 Schematic view of the balance plate and the slider in the present invention;

[0066] Figure 14 Schematic view of cleaning the interior of the housing in the present invention;

[0067] Figure 15 Schematic view of the interior of the acid storage box in the present invention;

[0068] Figure 16 Bottom view of the interior of the acid storage box in the present invention;

[0069] Figure 17 Schematic view of the docking module, torsion spring and locking splint in the present invention;

[0070] Figure 18 Schematic view of the interior of the alkali storage box in the present invention;

[0071] Figure 19 Partial sectional view of the single-pass component in the present invention;

[0072] Figure 20 Schematic view of the position of the first push plate at the end of the cleaning operation in the present invention.

[0073] In the figure: 1, docking seat; 2, reference electrode module; 3, working electrode module; 4, polytetrafluoroethylene gasket; 5, thin layer channel; 6, liquid inlet chamber; 7, reference electrode hole; 8, liquid discharge through groove; 9, placement sleeve; 10, reference electrode head; 11, reference electrode head seal ring; 12, ceramic permeable membrane; 13, reference electrode wire; 14, Ag / AgCl rod; 15, first docking interface; 16, first sealing ring; 17, first continuous screw rod; 18, inlet pipe; 19, first screwing part; 20, second sealing ring; 21, second docking interface; 22, third sealing ring; 23, second continuous screw rod; 24, outlet pipe; 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 socket; 34, positioning through hole; 35, balance plate; 36, bolt head; 37, spring groove; 38, slider; 39, spring; 40, positioning prompt plate; 41, avoidance hole; 42, reference electrode press head; 43, avoidance groove; 44, installation groove; 45, raised leg; 46, first row of pipes; 47, cleaning structure; 48, cleaning housing; 49, acid path cleaning component; 50, alkali path cleaning component; 51, acid storage box; 52, docking module; 53, torsion spring; 54, locking clamp plate; 55, threaded rod; 56, first push plate; 57, docking rod; 58, alkali adding box; 59, adjustment port; 60, jacking part; 61, clamping part; 62, alkali storage box; 63, second push plate; 64, return spring; 65, docking connecting rod; 66, clamping groove; 67, socket; 68, limiting connecting rod; 69, flow pipe; 70, sliding plug block; 71, docking sleeve; 72, rotary motor; 73, push-button stopper; 74, push-button direction adjuster; 75, acid adding box; 76, second row of pipes. Detailed implementation mode

[0074] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0075] Embodiment 1

[0076] As Figures 1 - 20 shown, a thin layer channel electrochemical sensor for on-line detection of available chlorine concentration includes a docking seat 1, a reference electrode module 2 and a working electrode module 3, and the working electrode module 3 is installed on the docking seat 1;

[0077] A tetrafluoroethylene gasket 4 is placed on the upper surface of the working electrode module 3. 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. As Figure 4 shown, the tetrafluoroethylene gasket 4 is provided with a thin-layer channel 5;

[0078] As Figure 3 and 5 shown, the reference electrode module 2 is provided with a liquid inlet cavity 6. A reference electrode hole 7 communicating with the liquid inlet cavity 6 is provided at the bottom of the reference electrode module 2. A reference electrode assembly communicating with the liquid inlet cavity 6 is installed at the top of the reference electrode module 2. A liquid inlet structure communicating with the liquid inlet cavity 6 is installed on one side of the reference electrode module 2. The reference electrode module 2 is further provided with a liquid discharge through groove 8. A liquid discharge structure is installed at the top of the liquid discharge through groove 8. A working electrode assembly communicating with the reference electrode hole 7 is installed in the working electrode module 3;

[0079] The liquid inlet structure includes a first continuous screw rod 17. The first continuous screw rod 17 is threadedly connected to the reference electrode module 2. The other end of the first continuous screw rod 17 is fixedly connected with a first screwing part 19. An introduction pipe 18 is fixedly embedded in the first continuous screw rod 17. One end of the introduction pipe 18 penetrates through the first continuous screw rod 17 and communicates with the liquid inlet cavity 6, and the other end penetrates through the first continuous screw rod 17 and the first screwing part 19 and extends outside;

[0080] The reference electrode hole 7, the working electrode assembly, and the liquid discharge through groove 8 are all communicated with the thin-layer channel 5.

[0081] Further, the reference electrode assembly includes a placement sleeve 9 and a reference electrode head 10. As Figure 3 、 Figure 5 and Figure 11 shown, the liquid inlet cavity 6 is in a T shape. As Figure 11 shown, the placement sleeve 9 is hollow inside and both the upper and lower ends are open. The placement sleeve 9 is threadedly connected in the liquid inlet cavity 6. A ceramic permeable membrane 12 is installed at the bottom of the placement sleeve 9;

[0082] The top end of the placement sleeve 9 is provided with a reference electrode head 10. The top of the reference electrode head 10 is provided with a reference electrode wire 13. The free end of the reference electrode wire 13 is electrically connected to an external electrical signal detection system. The bottom of the reference electrode head 10 is connected with an Ag / AgCl rod 14. The free end of the Ag / AgCl rod 14 extends into the placement sleeve 9. The bottom of the reference electrode head 10 is provided with a reference electrode head seal ring 11. The bottom of the reference electrode head seal ring 11 abuts against the horizontal end of the liquid inlet chamber 6 in a T shape. The provided reference electrode head seal ring 11 is used to increase the sealing performance and prevent the leakage of saturated potassium chloride solution. During installation, first thread the placement sleeve 9 into the liquid inlet chamber 6, add saturated potassium chloride solution into the placement sleeve 9, and then place the reference electrode head 10 connected with the Ag / AgCl rod 14 on the top end of the placement 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 remain constant in the saturated state. The provided ceramic permeation membrane 12 can prevent impurities in the liquid inlet chamber 6 from passing through. The provided reference electrode assembly can provide a known potential reference point as a reference;

[0083] Further, as Figures 5 - 7 shown, one side of the reference electrode module 2 is provided with a first pair of interfaces 15 communicating with the liquid inlet chamber 6. The inner wall of the first pair of interfaces 15 is pasted with a first sealing ring 16;

[0084] One end of the first continuation screw rod 17 is threadedly connected in the first pair of interfaces 15 and the end abuts against the first sealing ring 16. One side of the first screwing part 19 close to the reference electrode module 2 is embedded with a second sealing ring 20. The end of the introduction pipe 18 far from the liquid inlet chamber 6 is connected to the sampling port of the hypochlorous acid disinfection water production line through a pulsation-free pump (not shown in the figure). During detection, the end of the introduction pipe 18 far from the liquid inlet chamber 6 is connected to the pulsation-free pump, so that the hypochlorous acid disinfection water production line sends the hypochlorous acid disinfection water into the introduction pipe 18 through the sampling port and the pulsation-free pump.

[0085] Specifically, during installation, rotate the first screwing part 19. The first screwing part 19 drives the first continuation screw rod 17 to rotate, and then screw the first continuation screw rod 17 into the first pair of interfaces 15. The provided first sealing ring 16 can isolate the first pair of interfaces 15 from the liquid inlet chamber 6, ensure the airtightness inside the liquid inlet chamber 6, and at the same time prevent the solution to be measured from flowing into the first pair of interfaces 15, resulting in an increase in the error of chlorine concentration detection. The provided second sealing ring 20 can further ensure the airtightness inside the liquid inlet chamber 6.

[0086] Further, as Figure 5 、 Figure 8 and Figure 9As shown, the liquid discharge through groove 8 is provided with a second pair of interfaces 21. A third sealing ring 22 is attached to the inner wall of the second pair of interfaces 21. The liquid discharge structure includes a second continuous screw rod 23. One end of the second continuous screw rod 23 is threadedly connected to the second pair of interfaces 21 and its end abuts against the third sealing ring 22. An outlet pipe 24 is fixedly embedded inside the second continuous screw rod 23. One end of the outlet pipe 24 penetrates through the second continuous screw rod 23 and communicates with the liquid discharge through groove 8;

[0087] The other end of the second continuous screw rod 23 is fixedly connected with a second screwing part 25. A fourth sealing ring 26 is embedded on one side of the second screwing part 25 close to the reference electrode module 2. The other end of the outlet pipe 24 penetrates through the second screwing part 25, and its end is connected to an external recovery container, so as to recover and store the liquid in the liquid inlet cavity 6, the thin layer channel 5 and the liquid discharge through groove 8.

[0088] Specifically, during installation, rotate the second screwing part 25. The second screwing part 25 drives the second continuous screw rod 23 to rotate, and then screws the second continuous screw rod 23 into the second pair of interfaces 21. The provided third sealing ring 22 can prevent hypochlorous acid disinfectant water from flowing into the second pair of interfaces 21, thus affecting the discharge of hypochlorous acid disinfectant water from the outlet pipe 24. The provided fourth sealing ring 26 can further ensure the airtightness inside the liquid inlet cavity 6.

[0089] Further, as Figure 3 and Figure 10 shown, the working electrode assembly includes a gold working electrode 27 and a gold counter electrode 28. Two embedding holes 29 are formed 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 surface of the embedding holes 29. A gold working electrode lead wire 30 is provided at the bottom of the gold working electrode 27, and a gold counter electrode lead wire 31 is provided at the bottom of the gold counter electrode 28. The free ends of the gold working electrode lead wire 30 and the gold counter electrode lead wire 31 penetrate through the working electrode module 3 and extend outside. The gold working electrode lead wire 30 and the gold counter electrode lead wire 31 are both electrically connected to an external electrical signal detection system.

[0090] Further, as Figure 4 shown, a plurality of positioning rods 32 are installed at the bottom of the reference electrode module 2. Positioning sockets 33 corresponding to the plurality of positioning rods 32 one by one are formed on the upper surface of the working electrode module 3. Positioning through holes 34 corresponding to the plurality of positioning rods 32 one by one are formed on the polytetrafluoroethylene gasket 4. The free ends of the plurality of positioning rods 32 pass through the positioning through holes 34 and are inserted into the positioning sockets 33;

[0091] During installation, first place the polytetrafluoroethylene gasket 4 on the upper surface of the working electrode module 3, align the positioning perforation 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 perforation 34 and the positioning socket 33. Clamp the polytetrafluoroethylene gasket 4 through the reference electrode module 2 and the working electrode module 3, and limit the position of the polytetrafluoroethylene gasket 4 through the positioning rod 32 to prevent the polytetrafluoroethylene gasket 4 from shifting during operation, thereby affecting the accuracy of detection;

[0092] The thickness of the polytetrafluoroethylene gasket 4 is 25 μm;

[0093] The upper surface of the gold working electrode 27 is circular and has a diameter of 1 mm;

[0094] The gold working electrode 27 is located directly below the reference electrode hole 7.

[0095] By setting the thickness of the polytetrafluoroethylene gasket 4 to 25 μm, the distance between the reference electrode hole 7 and the gold working electrode 27 is accurately controlled at 25 μm. At the same time, the thickness of the thin layer channel 5 is accurately 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 I R value, and thus the purpose of accurately measuring the effective chlorine concentration without adding electrolytes can be achieved, reducing the experimental cost.

[0096] As Figure 1 , Figure 12 and Figure 13 shown, 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 positioning structure includes a balance plate 35 and two bolt heads 36. Two spring grooves 37 are opened 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. 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;

[0097] Two bolt heads 36 are threadedly connected to the top of the docking seat 1. The bottom ends of the two bolt heads 36 threadedly penetrate through the docking seat 1 and abut against the upper surface of the balance plate 35;

[0098] A positioning reminder plate 40 is provided at the bottom of the inner wall of the docking seat 1. The positioning reminder plate 40 is in contact with the working electrode module 3. During installation, place the working electrode module 3 on the docking seat 1, and make the two sides of the working electrode module 3 fit against one side of the inner wall of the docking seat 1 and the positioning reminder plate 40 respectively to complete the positioning.

[0099] After installing the reference electrode module 2, the polytetrafluoroethylene gasket 4, and the working electrode module 3, rotate the two bolt heads 36 clockwise. The two bolt heads 36 squeeze the balance plate 35 downward. 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 squeezes the reference electrode module 2 to increase the stability among the reference electrode module 2, the polytetrafluoroethylene gasket 4, and the working electrode module 3;

[0100] Further, two avoidance holes 41 are provided in the balance plate 35. During the process of the balance plate 35 moving downward, the reference electrode head 10 is located in one of the avoidance holes 41, and the second screwing part 25 is located in the other avoidance hole 41. When moving, the staff passes the other ends of the reference electrode wire 13 and the outlet pipe 24 through the avoidance holes 41 to prevent the reference electrode wire 13 and the outlet pipe 24 of the balance plate 35 from being squeezed between the balance plate 35 and the reference electrode module 2, resulting in damage to the reference electrode wire 13 and the inability of the outlet pipe 24 to drain liquid normally. Among them, when the balance plate 35 moves downward, the spring 39 is in a stretched state. In the present invention, by rotating the two bolt heads 36 to drive the balance plate 35 to move, it can be ensured that when the balance plate 35 moves to any position, under the action of the bolt head 36 and the spring 39, the balance plate 35 will not reset or move downward automatically, enabling the staff to free their hands to pass the other ends of the reference electrode wire 13 and the outlet pipe 24 through the avoidance holes 41. A reference electrode press head 42 is also threadedly connected to the top of the docking seat 1. By rotating the reference electrode press head 42 clockwise, the reference electrode press head 42 moves downward. The bottom end of the reference electrode press head 42 threadedly penetrates out of 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 to increase the sealing performance between the reference electrode head 10 and the placement sleeve 9;

[0101] An avoidance groove 43 is provided at the bottom of the docking seat 1. The free ends of the gold working electrode wire 30 and the gold counter electrode wire 31 both penetrate out of the avoidance groove 43 and extend outside;

[0102] As Figure 2 shown, mounting grooves 44 are provided at the four corners of the bottom of the docking seat 1. Heightening legs 45 are rotatably connected in the plurality of mounting grooves 44. By providing the heightening legs 45, the height of the bottom of the docking seat 1 can be increased to prevent the docking seat 1 from squeezing the gold working electrode wire 30 and the gold counter electrode wire 31, resulting in damage to the gold working electrode wire 30 and the gold counter electrode wire 31.

[0103] In this embodiment, the specific operation process is as follows:

[0104] S1: During installation, place the working electrode module 3 on the docking seat 1, and make the two sides of the working electrode module 3 fit against one side of the inner wall of the docking seat 1 and the positioning prompt board 40 respectively to complete the positioning.

[0105] S2: Then place the polytetrafluoroethylene gasket 4 on the upper surface of the working electrode module 3, align the positioning perforation 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 perforation 34 and the positioning socket 33. Clamp the polytetrafluoroethylene gasket 4 through the reference electrode module 2 and the working electrode module 3, and limit the position of the polytetrafluoroethylene gasket 4 through the positioning rod 32.

[0106] S3: Then thread the placement sleeve 9 into the liquid inlet chamber 6, add saturated potassium chloride solution into the placement sleeve 9, and then place the reference electrode head 10 connected with the Ag / AgCl rod 14 at the top of the placement sleeve 9, so that the Ag / AgCl rod 14 is immersed in the saturated potassium chloride solution to complete the installation of the reference electrode assembly.

[0107] S4: Insert the first continuous screw rod 17 into the first docking port 15, and then rotate the first screwing part 19. The first screwing part 19 drives the first continuous screw rod 17 to rotate, and then screw the first continuous screw rod 17 into the first docking port 15 to complete the installation of the liquid inlet structure.

[0108] S5: Insert the second continuous screw rod 23 into the second docking port 21, and then rotate the second screwing part 25. The second screwing part 25 drives the second continuous screw rod 23 to rotate, and then screw the second continuous screw rod 23 into the second docking port 21 to complete the installation of the liquid drainage structure.

[0109] S6: After the installation of each part is completed, rotate the two bolt heads 36 clockwise. The two bolt heads 36 squeeze the balance plate 35 downward. 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 squeezes the reference electrode module 2. Then rotate the reference electrode press head 42 clockwise to make the reference electrode press head 42 move downward. The bottom end of the reference electrode press head 42 threadedly penetrates out of 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 to increase the sealing performance between the reference electrode head 10 and the placement sleeve 9.

[0110] 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 inlet tube 18 to the sampling outlet of the hypochlorous acid disinfection water production line through a pulsation-free pump, and connect the outlet tube 24 to the recovery container. Then the detection can start. The hypochlorous acid disinfection water to be detected flows in from the inlet tube 18 and successively passes through the first pair of interfaces 15, the liquid inlet chamber 6, the thin layer channel 5, the liquid discharge trough 8, and finally flows out from the outlet tube 24. The whole detection process is isolated from the outside world to reduce errors.

[0111] Embodiment 2

[0112] As Figures 1 - 20 shown, the following improvements are made to this embodiment on the basis of Embodiment 1: Further, as Figure 1 and Figure 14 shown, a cleaning structure 47 is installed on one side of the docking seat 1. The cleaning structure 47 includes a cleaning housing 48 and an acid path cleaning component 49 and an alkali path cleaning component 50 installed in the cleaning housing 48. The alkali path cleaning component 50 is located directly below the acid path cleaning component 49;

[0113] As Figures 15 - 17 shown, the acid path cleaning component 49 includes an acid storage box 51, a docking module 52, a torsion spring 53, and a locking splint 54. A threaded rod 55 is rotatably connected in the acid storage box 51. A first push plate 56 is threadedly engaged with 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. The bottom of the first push plate 56 is fixedly connected to a docking rod 57. The bottom of the docking rod 57 slidably penetrates the acid storage box 51 and extends outside, and the free end is fixedly connected to a docking module 52 in a cross shape. There are two groups of docking rods 57, and they are symmetrically distributed on the top of the docking module 52; Adjusting ports 59 are provided at both ends of the docking module 52. Torsion springs 53 are rotatably connected in both adjusting ports 59. One side of the locking splint 54 is fixedly connected to a limiting connecting rod 68. The two ends of the limiting connecting rod 68 are rotatably connected to the adjusting ports 59; The locking splint 54 is rotatably connected to the adjusting port 59 through the limiting connecting rod 68. The two ends of the torsion spring 53 are respectively fixedly connected to the inner wall of the adjusting port 59 and the locking splint 54. The bottom of the acid storage box 51 is symmetrically provided with a pushing part 60. The top end of the locking splint 54 is in contact with the pushing part 60. The bottom end of the locking splint 54 is provided with a clamping part 61;

[0114] As Figure 18As shown, the alkali path 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 reset spring 64 is fixedly connected to the bottom of the inner cavity of the alkali storage box 62. The top of the reset spring 64 is fixedly connected to the second push plate 63. A docking connecting rod 65 is fixedly connected to the top of the second push plate 63. The top of the docking connecting rod 65 slidably penetrates through the alkali storage box 62 and extends outside. Opposite clamping grooves 66 adapted to the opposite clamping parts 61 are formed on both sides of the docking connecting rod 65.

[0115] As Figure 14 and Figure 19 shown, the acid storage box 51 and the alkali storage box 62 are respectively connected to the same one-way component through a first discharge pipe 46 and a second discharge pipe 76.

[0116] 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.

[0117] The one-way component includes a flow pipe 69. A sliding plug block 70 is slidably connected inside the flow pipe 69. The bottom of the inner cavity of the acid storage box 51 is fixedly communicated with the top of the inner cavity of the flow pipe 69 through the first discharge pipe 46. The top of the inner cavity of the alkali storage box 62 is fixedly communicated with the bottom of the inner cavity of the flow pipe 69 through the second discharge pipe 76. One side of the flow pipe 69 is communicated with a docking sleeve 71. A socket 67 is provided at the free end of the docking sleeve 71. The end of the inlet pipe 18 away from the liquid inlet cavity 6 is detachably inserted into the socket 67.

[0118] Further, as Figure 4 shown, a rotary motor 72 is installed on the acid storage box 51. The rotary motor 72 is in signal transmission connection with an external control terminal. The top of the threaded rod 55 slidably penetrates through the acid storage box 51 and is fixedly connected to the rotating shaft of the rotary motor 72.

[0119] As Figure 20 shown, a push-button stopper 73 and a push-button aligner 74 in signal transmission connection with the rotary motor 72 are respectively installed at the top and bottom of one side of the inner cavity of the acid storage box 51.

[0120] As Figure 14 shown, the acid storage box 51 is communicated with an acid adding tank 75 through a one-way pump, and the alkali storage box 62 is communicated with an alkali adding tank 58 through a one-way pump.

[0121] In the present invention, two cleaning methods for the reference electrode module 2, the polytetrafluoroethylene gasket 4, and the working electrode module 3 are provided according to two different usage scenarios:

[0122] When only a single detection is required:

[0123] S10: After a single detection is completed, 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. Then, rotate the reference electrode press head 42 counterclockwise to reset the reference electrode press head 42 and stop pressing on the reference electrode head 10. Then, rotate the two bolt press heads 36 counterclockwise. The two bolt press 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 contract and reset, and drive the balance plate 35 to move upward and reset through the slider 38, thereby causing the balance plate 35 to stop squeezing the reference electrode module 2. Then, the staff disassembles the reference electrode assembly, the working electrode assembly, the liquid inlet structure, and the liquid discharge structure on the reference electrode module 2, and then separates the reference electrode module 2, the polytetrafluoroethylene gasket 4, and the working electrode module 3 for separate cleaning.

[0124] When continuous detection is required:

[0125] S20: During 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. Disconnect the inlet pipe 18 from the pulsation-free pump, connect the socket 67 to the inlet pipe 18, and turn on the rotary motor 72. The rotary motor 72 drives the threaded rod 55 to rotate clockwise through the rotating shaft. Under the action of thread engagement, the first push plate 56 slides downward, and discharges the acidic cleaning solution in the acid storage box 51 into the flow pipe 69 through the first drain pipe 46. At this time, the acidic cleaning solution presses the sliding plug 70 in the flow pipe 69 downward, causing the sliding plug 70 to slide to the bottom of the inner cavity of the flow pipe 69, thereby blocking the second drain pipe 76. The acidic cleaning solution 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 radicals on the surface of the gold working electrode 27. The cleaned dirt will flow into the drain trough 8 along with the flow of the acidic cleaning solution and finally flow out of the outlet pipe 24 into the recovery container;

[0126] When the first push plate 56 slides downward, it drives the docking module 52 and the two locking clamps 54 to move downward simultaneously through the docking rod 57. When the locking clamp 54 moves downward to contact the top of the docking link 65, as the first push plate 56 continues to slide downward, the docking link 65 will apply an upward 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 clamp 54 move into the clamping groove 66, the upward 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 stretch 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, as Figure 20As shown, at this time, the first push plate 56 just slides to the inner cavity bottom of the acid storage box 51 (i.e., the acidic cleaning work is completed), and at the same time, the pressing type aligner 74 is squeezed. At this time, the pressing type aligner 74 will control the rotating shaft of the rotating motor 72 to drive the threaded rod 55 to rotate counterclockwise. The first push plate 56 starts to slide upward, and at the same time, drives the docking module 52 and the two locking splints 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 discharge the alkaline cleaning liquid in the alkali storage box 62 into the flow pipe 69 through the second drain pipe 76. At this time, the alkaline cleaning liquid will push the sliding plug block 70 at the inner cavity bottom of the flow pipe 69 upward, thereby blocking the first drain pipe 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 drain through groove 8 along with the flow of the alkaline cleaning liquid and finally flow out of the export pipe 24 into the recovery container;

[0127] Among them, when the first push plate 56 moves upward, the inside of the acid storage box 51 is in a negative pressure state. At this time, the acid adding box 75 will supplement the acidic 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 reset spring 64 is stretched. As the first push plate 56 moves upward, the two locking splints 54 will also move upward synchronously. When the top of the two locking splints 54 contacts the pushing part 60 provided at the bottom of the acid storage box 51, and as the two locking splints 54 continue to move upward, the pushing part 60 will squeeze the top of the two locking splints 54. At this time, the two locking splints 54 will rotate outward under the squeeze. At this time, the clamping part 61 at the bottom of the locking splint 54 will gradually separate from the clamping groove 66. When the first push plate 56 moves upward to the inner cavity top of the acid storage box 51 (i.e., the alkaline cleaning work is completed), at this time, the clamping part 61 at the bottom of the locking splint 54 will completely separate from the clamping groove 66, thereby canceling the clamping of the docking connecting rod 65. At this time, the stretched reset spring 64 will contract and reset, and at the same time, pull the second push plate 63 and the docking connecting rod 65 back to the reset position. During the reset process, the inside of the alkali storage box 62 is in a negative pressure state. At this time, the alkali adding box 58 will supplement the alkaline cleaning liquid into the alkali storage box 62 through the one-way pump to wait for the next work;

[0128] 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 will squeeze the push-button stopper 73, and the push-button stopper 73 sends a stop command to the rotary motor 72. At this time, the rotating shaft of the rotary motor 72 stops rotating, and at the same time, the acid circuit cleaning component 49 and the alkali circuit cleaning component 50 also reset (that is, the entire cleaning work is completed). In the present invention, through the cooperation of the acid circuit cleaning component 49 and the alkali circuit cleaning component 50, the dirt on the surface of the gold working electrode 27 is removed, ensuring that the electrochemical activity on the surface of the gold working electrode 27 during the measurement process remains stable for a long time, thereby ensuring the stability and accuracy of the detection data.

[0129] After the cleaning is completed, separate the socket 67 from the inlet pipe 18, connect the inlet pipe 18 to the pulsation-free pump, and then 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 to start the next detection;

[0130] Among them, at the initial stage of detection, the hypochlorous acid disinfectant water to be detected will flow into the inlet pipe 18 and push the alkaline cleaning liquid in the inlet pipe 18, the first pair of interfaces 15, the liquid inlet cavity 6, the thin layer channel 5, and the liquid discharge trough 8 to flow out from the outlet pipe 24, so as to discharge the remaining alkaline cleaning liquid.

[0131] However, as is well known to those skilled in the art, the working principles and wiring methods of the gold working electrode 27, the gold counter electrode 28, the electrical signal detection system, the rotary motor 72, the push-button stopper 73, and the push-button aligner 74 are common knowledge, and they all belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0132] The above different embodiments can be combined, replaced, and used in combination with each other.

[0133] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0134] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 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; 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.

2. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 1, 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).

3. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 1, 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.

4. 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).

5. 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.

6. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 4, 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.

7. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 6, 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.

8. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 7, 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).

9. The thin-layer channel electrochemical sensor for online detection of effective chlorine concentration according to claim 8, 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), 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), 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).

Images