An ion selective electrode for detecting chloride ion analysis device

Abstract

The present invention belongs to the technical field of ion detection equipment, and particularly relates to an ion selective electrode for detecting chloride ion analysis device; comprising a fixing plate, a lifting mechanism and a detection component, the lifting mechanism is arranged on the fixing plate, the detection component is connected below the lifting mechanism, the detection component includes a housing, a piston and a detection rod, the housing is arranged on the fixing plate, an opening is arranged at the bottom of the housing, a circular vertical wall is vertically arranged in the inner side direction of the housing from the opening, the piston is slidably arranged in the cavity and connected with the lifting mechanism, a driving part is arranged between the circular vertical wall and the side wall of the detection rod, the driving part drives the detection rod to rotate as the piston moves up and down, an electrode point is arranged on the bottom side of the detection rod, an umbrella-shaped head is connected to the bottom surface of the detection rod, and the umbrella-shaped head rotates with the detection rod to discharge the foam on the liquid surface; it can avoid the contact between bubbles and the electrode point during detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of ion detection equipment, and particularly relates to an ion selective electrode for detecting chloride ion analysis device. Background Art

[0002] The core principle of the chloride ion analysis device using a selective electrode is based on ion selective electrode technology. When the electrode is placed in the solution to be measured, a series of electrochemical reactions will occur on the electrode surface, and the degree of these reactions is directly related to the concentration of chloride ions in the solution. Specifically, the reference electrode inside the instrument provides a stable potential reference, while the working electrode (i.e., the chloride ion selective electrode) is responsible for measuring the potential change caused by chloride ions in the solution. As the concentration of chloride ions increases, the potential difference between the working electrode and the reference electrode will increase accordingly. This change is converted into a readable digital or analog signal through the precise circuit inside the instrument and finally visually displayed on the display screen.

[0003] The chloride ion analysis device is generally used in the fields of drinking water detection, industrial wastewater detection, swimming pool water quality detection, chemical laboratory solution analysis, pharmaceutical industry, and seawater aquaculture. When used for industrial wastewater detection, when the wastewater contains a large amount of organic matter, microorganisms will produce a large amount of gas during the decomposition of these organic matters. When the gas emerges from the water surface, it is easy to generate a large number of fine bubbles and form foam on the water surface. Chemical substances such as surfactants existing in industrial wastewater are more likely to form foam under the influence of chloride ions. Moreover, in the presence of chloride ions in water, chloride ions can reduce the surface tension of water, making it easier for water to form bubbles. When detecting the content of chloride ions in the solution, the working electrode and the reference electrode need to be placed in the solution. A large number of bubbles in the water may adhere to the electrodes and enter underwater along with the electrodes. The bubbles adhering to the electrodes will limit the contact area between the electrodes and the solution. The reduction of the contact area means that the number of chloride ions that can be contacted on the electrode surface decreases, resulting in a weakening of the response signal of the electrode to chloride ions and a decrease in sensitivity. This may cause the electrode to be unable to accurately capture the signal change when measuring low-concentration chloride ions, resulting in a low measurement result or an inaccurate reading.

[0004] To solve this problem, a bubble removal device for on-line detection of tantalum and niobium smelting wastewater in Chinese Patent CN220552812U includes a detection box. A shaking mechanism is fixedly connected to the rear side of the detection box. The detection box includes a fluoride electrode, a water inlet, a drain port, a valve, and a water outlet. The fluoride electrode is movably connected to the upper end of the inner cavity of the detection box. The upper end of the water inlet is fixedly connected to the left side of the lower end of the detection box. The upper end of the drain port is fixedly connected to the lower end of the detection box. The valve is fixedly connected to the surface of the drain port. The left side of the water outlet is fixedly connected to the right side of the detection box. The shaking mechanism includes a frame, an electromagnet, a spring, an iron block, a fixed rod, a time controller, a storage battery, and a fixing component. By setting the cooperation of the detection box, the fluoride electrode, the valve, and the shaking mechanism, the shaking mechanism drives the fluoride electrode to shake to remove the bubbles generated on the surface of the fluoride electrode. However, shaking can only displace the bubbles, and it is difficult to eliminate the bubbles. The shaken bubbles are still easy to contact the electrode. To avoid this problem, the present invention proposes an ion selective electrode for detecting chloride ion analysis device. Summary of the Invention

[0005] To solve the above problems existing in the prior art, the present invention provides an ion selective electrode for detecting chloride ion analysis device.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] An ion selective electrode for detecting chloride ion analysis device, including a fixing plate, a lifting mechanism, and a detection component. The lifting mechanism is arranged on the fixing plate. The detection component is connected below the lifting mechanism. The detection component includes a housing, a piston, and a detection rod. The housing is arranged on the fixing plate. An opening is provided at the bottom of the housing. A circular vertical wall is vertically arranged in the inner side direction of the housing from the opening. A cavity is formed between the circular vertical wall and the inner side wall of the housing. The piston is slidably arranged in the cavity and connected to the lifting mechanism. The top of the detection rod is rotatably clamped in the piston and extends out of the housing through the circular vertical wall and the opening. A driving part is arranged between the circular vertical wall and the side wall of the detection rod. The driving part drives the detection rod to rotate as the piston moves up and down. An electrode point is arranged on the side surface of the bottom of the detection rod. An umbrella-shaped head is connected to the bottom surface of the detection rod. The umbrella-shaped head rotates with the detection rod to drain the foam on the liquid surface.

[0008] Further, the diameter of the umbrella-shaped head is larger than the diameter of the detection rod.

[0009] Further, the driving part includes an external thread provided on the side surface of the detection rod and an internal thread provided on the circular vertical wall. The internal thread and the external thread are engaged with each other.

[0010] Further, a large column section is included on the detection rod. The large column section is rotationally and embedded in the inner side wall of the piston. Ball bearings are arranged at the top and bottom of the protruding part of the large column section and are in rolling contact with the top and bottom of the inner side wall of the piston.

[0011] Further, a plurality of fan blades are arranged at the bottom of the umbrella-shaped head. The plurality of fan blades are used to increase the stirring force on the liquid surface.

[0012] Further, the plurality of fan blades are arc-shaped fan blades. The fan blades rotate as the detection rod rotates. The plurality of fan blades rotate in the forward direction as the detection rod descends, and the plurality of fan blades rotate in the reverse direction as the detection rod ascends.

[0013] Further, a water inlet and a water outlet are arranged at the bottom of the cavity. Check valves are arranged in both the water inlet and the water outlet. Water enters the cavity as the piston rises and drains as the piston descends. The water in the cavity is used to clean the electrode points on the detection rod when the detection rod rises with the piston.

[0014] Further, the annular vertical wall is of a hollow structure.

[0015] Further, the lifting mechanism is a cylinder, and the telescopic rod of the cylinder is connected to the top of the piston.

[0016] Further, a sealing ring is embedded on the inner side surface of the annular vertical wall, and the sealing ring abuts against the side wall of the detection rod.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) A driving part is arranged on the annular vertical wall and the side wall of the detection rod. Since the top of the detection rod is arranged inside the piston, the detection rod will move up and down with the piston. The driving part can drive the detection rod to rotate with the kinetic energy of the up and down movement of the piston. The umbrella-shaped head at the bottom of the detection rod is at the bottommost position and can contact the liquid surface of the liquid to be detected before the electrode point of the detection rod. Since the umbrella-shaped head rotates during the descent, when there are foams on the liquid surface, the umbrella-shaped head can push the foams aside by rotation while the detection rod extends into the water at the same time, so that the electrode point enters below the liquid surface, avoiding contact with the foams on the liquid surface, improving the accuracy of detecting the chloride ion concentration in the liquid to be detected, and reducing the interference caused by the foams in the liquid;

[0019] (2) The detection rod is moved upward by the upward movement of the piston. At the same time, the negative pressure formed in the cavity will suck the water outside the water inlet into the cavity to clean the electrode points on the detection rod. After the cleaning is completed, the detection of the next sample will be carried out. At this time, the piston moves downward to push the detection rod downward. At the same time, the piston discharges the waste liquid in the cavity out of the housing through the water outlet. In order to avoid the interference of the liquid inlet and outlet actions of the water inlet and the water outlet in the two states, check valves are provided in both the water inlet and the water outlet. The water in the water inlet can only enter and cannot exit, while the water in the water outlet can only exit and cannot enter. The up and down movement of the piston not only moves the detection rod up and down, but also makes the detection rod rotate through the driving part, and can also control the entry and exit of the liquid in the cavity to clean the electrode points, achieving multiple functional effects. Description of the Drawings

[0020] For the convenience of those skilled in the art to understand, the present invention will be further described below in conjunction with the drawings.

[0021] Figure 1 Front structural schematic diagram of the present invention;

[0022] Figure 2 Side structural schematic diagram of the present invention;

[0023] Figure 3 Enlarged structural schematic diagram of the detection component of the present invention;

[0024] Figure 4 Schematic diagram of the fan blade structure of the present invention;

[0025] Figure 5 For Figure 1 Enlarged view of part A in

[0026] Description of the reference numerals: 1, fixing plate; 2, cylinder; 3, housing; 4, piston; 5, detection rod; 6, umbrella-shaped head; 7, fan blade; 8, electrode point; 9, water inlet; 10, water outlet; 11, annular vertical wall; 12, external thread. Detailed Embodiments

[0027] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the drawings and preferred embodiments, details the specific embodiments, structures, features, and effects according to the present invention.

[0028] As Figures 1 - 5As shown in the figure, an ion-selective electrode-based chloride ion detection and analysis device of the present invention includes a fixing plate 1, a lifting mechanism, and a detection component. The lifting mechanism is arranged on the fixing plate 1, and the detection component is connected below the lifting mechanism. The detection component includes a housing 3, a piston 4, and a detection rod 5. The housing 3 is arranged on the fixing plate 1. An opening is provided at the bottom of the housing 3, and a circular vertical wall 11 is vertically arranged in the direction of the inner side of the housing 3. A cavity is formed between the circular vertical wall 11 and the inner wall of the housing 3. The piston 4 is slidably arranged in the cavity and is connected to the lifting mechanism. The top of the detection rod 5 is rotatably clamped in the piston 4 and extends out of the housing 3 along the circular vertical wall 11 and the opening. A driving part is arranged between the circular vertical wall 11 and the side wall of the detection rod 5, and the driving part drives the detection rod 5 to rotate as the piston 4 moves up and down. An electrode point 8 is arranged on the side surface of the bottom of the detection rod 5, and an umbrella-shaped head 6 is connected to the bottom surface of the detection rod 5. The diameter of the umbrella-shaped head 6 is larger than that of the detection rod 5. The umbrella-shaped head 6 rotates with the detection rod 5 to disperse the foam on the liquid surface;

[0029] When detecting the chloride ion content in a solution through the detection device, it is necessary to place a working electrode and a reference electrode in the solution. A large number of bubbles in the water may adhere to the electrodes and enter underwater along with the electrodes. Moreover, the higher the concentration of chloride ions in the water, the lower the surface tension of the water, which will further cause bubbles to be more easily generated. The bubbles adhering to the electrodes will limit the contact area between the electrodes and the solution. A reduced contact area means that the number of chloride ions that can be contacted on the electrode surface decreases, resulting in a weakened response signal of the electrode to chloride ions and a decrease in sensitivity. This may cause the electrode to be unable to accurately capture signal changes when measuring low-concentration chloride ions, resulting in a lower measurement result or an inability to accurately read the value;

[0030] Therefore, in order to prevent the electrode point 8 from being adhered by foam, when detecting through the detection rod 5, the detection rod 5 rotates while moving downward, and the centrifugal force generated by the rotation pushes the foam to disperse. Specifically, the fixing plate 1 is installed on the detection frame. The lifting mechanism installed on the fixing plate 1 is a cylinder 2, and the housing 3 is also connected to the fixing plate 1. The piston 4 in the housing 3 has a through structure. The piston 4 is sleeved on the detection rod 5, and the detection rod 5 is clamped in the piston 4. After being sleeved, the through hole at the top of the piston 4 is covered by a cover plate, so that the detection rod 5 is installed in the piston 4. Finally, the telescopic rod of the cylinder 2 is connected to the cover plate of the piston 4, and the piston 4 is driven by the cylinder 2 to move up and down in the housing 3. The structure of the housing 3 is cylindrical, and there is also a circular vertical wall 11 in the housing 3 connected to the opening at the bottom of the housing 3. The length of the circular vertical wall 11 in the housing 3 is shorter than that of the piston 4. The piston 4 is arranged in the cavity between the circular vertical wall 11 and the housing 3, and the respective sides of the piston 4 are in contact with the inner wall of the housing 3 and the side surface of the circular vertical wall 11.

[0031] In order to achieve the action that the detection rod 5 rotates as the piston 4 reciprocates up and down, a driving part is provided on the annular vertical wall 11 and the side wall of the detection rod 5. Since the top of the detection rod 5 is arranged inside the piston 4, the detection rod 5 will move up and down with the piston 4. The driving part can drive the detection rod 5 to rotate with the kinetic energy of the up and down movement of the piston 4. When the umbrella-shaped head 6 at the bottom of the detection rod 5 is at the bottommost position, it can contact the liquid level of the liquid to be detected before the electrode point 8 of the detection rod 5. Since the umbrella-shaped head 6 rotates during the descending process, when there are foams on the liquid surface, the umbrella-shaped head 6 can push the foams aside by rotation. And some foams that are not pushed aside will be pressed into the water by the bottom of the umbrella-shaped head 6. Different from the prior art where the electrode point 8 is arranged at the bottom, in this embodiment, the electrode point 8 is on the side of the detection rod 5. Since the foams will only float on the liquid surface without external force, when the umbrella-shaped head 6 pushes the foams aside, the detection rod 5 extends into the water at the same time, so that the electrode point 8 enters below the liquid level, avoiding contact with the foams on the liquid surface, improving the accuracy of detecting the chloride ion concentration in the liquid to be detected, and reducing the interference caused by the foams in the liquid.

[0032] While the detection rod 5 rotates and extends into the water, the umbrella-shaped head 6 pushes the foams on the liquid surface aside. However, the foams are fluid, and there is a probability that after being pushed aside, the water waves hit the side wall of the container and then push the foams back in the direction of the detection rod 5. Since the electrode point 8 is arranged on the side wall of the detection rod 5, if the diameter of the umbrella-shaped head 6 is the same as that of the detection rod 5, the effect of dispersing the foams may be poor. Therefore, in one embodiment, the diameter of the umbrella-shaped head 6 is larger than that of the detection rod 5.

[0033] In one embodiment, the driving part includes an external thread 12 opened on the side of the detection rod 5 and an internal thread opened on the annular vertical wall 11, and the internal thread and the external thread 12 mesh with each other; the number of turns of the external thread 12 on the side wall of the detection rod 5 can be relatively large, which is set according to the up and down movement range of the detection rod 5, while the number of internal threads on the annular vertical wall 11 is relatively small to reduce the friction between the internal thread and the external thread 12. When the detection rod 5 moves up and down with the piston 4, the external thread 12 on the detection rod 5 rotates along the direction of the internal thread on the annular vertical wall 11, and the rotation direction of the detection rod 5 changes with the up and down movement direction of the detection rod 5. It can not only disperse the foams and bubbles when the detection rod 5 extends underwater, but also disperse the foams and bubbles when the detection rod 5 extends out of the water surface.

[0034] Since the detection rod 5 needs to rotate while moving up and down with the piston 4 in the above embodiments, and a large frictional force is generated during this process, resulting in non-smooth rotation of the detection rod 5. In order to reduce the frictional force between the detection rod 5 and the piston 4, in one embodiment, the detection rod 5 includes a large column section, and the large column section is rotationally embedded in the inner side wall of the piston 4. Ball bearings are provided at the top and bottom of the protruding part of the large column section and are in rolling contact with the top and bottom of the inner side wall of the piston 4;

[0035] The large column section is located at the top position of the detection rod 5, and a corresponding slot is also provided in the piston 4 for installing the large column section of the detection rod 5. When installing the detection rod 5 into the piston 4, the detection rod 5 is inserted from the top of the piston 4 until the bottom of the large column section of the detection rod 5 abuts against the top of the slot in the piston 4. After the cover plate on the piston 4 is closed, the top of the large column section abuts against the top of the cover plate of the piston 4. In order to reduce the frictional force, ball bearings are provided at the contact positions between the large column section and the top of the slot and the bottom of the cover plate, so as to reduce the frictional force between the detection rod 5 and the piston 4.

[0036] Since the rotation of the umbrella-shaped head 6 at the bottom of the detection rod 5 disperses the foam and bubbles on the water surface in the above embodiments, and the side wall of the general umbrella-shaped head 6 is smooth, the centrifugal force generated during its rotation has a small effect on the water surface. In order to improve the dispersing effect on the foam and bubbles on the water surface, in one embodiment, a plurality of fan blades 7 are provided at the bottom of the umbrella-shaped head 6, and the plurality of fan blades 7 are used to increase the stirring force on the liquid surface;

[0037] The fan blades 7 at the bottom of the umbrella-shaped head 6 are vertically arranged at the bottom of the umbrella-shaped head 6. After the fan blades 7 come into contact with the foam and bubbles on the liquid surface, part of the bubbles and foam can be broken through the rotational force. Until the fan blades 7 contact the liquid surface, the stirring action of the fan blades 7 on the water is greater, and the foam and bubbles on the liquid surface can be pushed farther. When the detection rod 5 extends out of the water surface after the detection is completed, the greater stirring action of the fan blades 7 on the water can also disperse the foam on the water surface, preventing it from adhering to the side wall of the detection rod 5 and avoiding affecting the next detection.

[0038] And since a high concentration of chloride ions will cause the surface tension of the liquid to decrease, resulting in more foam and bubbles being easily generated when being stirred and dispersed by the fan blades 7. In order to avoid this problem, the plurality of fan blades 7 are arc-shaped fan blades 7. The fan blades 7 rotate with the rotation of the detection rod 5. The plurality of fan blades 7 rotate in the forward direction as the detection rod 5 descends, and the plurality of fan blades 7 rotate in the reverse direction as the detection rod 5 ascends;

[0039] In order to enable the fan blade 7 to push the foam and bubbles on the liquid surface further when rotating while reducing the generation of new bubbles and foam, the shape of the fan blade 7 is arc-shaped, and the convex side of the arc of the fan blade 7 needs to be in the same direction as the rotation direction of the fan blade 7 when the detection rod 5 descends, and in the opposite direction to the rotation direction of the fan blade 7 when the detection rod 5 ascends. Specifically, there is a convex side and a concave side in the arc-shaped fan blade 7. When the convex sides of all the fan blades 7 face the rotation direction in the water, its arc surface will form an inclination angle with the direction of water flow, and the impact force between the liquid and the convex side of the fan blade 7 is also small, and it will gradually spread outward after the impact. Therefore, when rotating, it can not only ensure sufficient driving force for the liquid and disperse the foam and bubbles, but also avoid the generation of bubbles due to the collision of the liquid after agitation; and during the process of the detection rod 5 extending out of the water surface, since the detection rod 5 rotates in the reverse direction, the concave side of the fan blade 7 faces the rotation direction, which will generate a greater stirring force. Although new foam is generated while a large amount of foam is dispersed, the detection of the tested liquid has been completed, so it will not affect the test result.

[0040] When detecting a large number of test samples, generally, after installing the fixed plate 1, the lifting mechanism and the detection component on the detection frame, a detection turntable is arranged below the detection frame, and a number of detection platforms are arranged on the detection turntable for placing containers, so that multiple samples can be quickly detected. And during the interval between detecting multiple samples, it is necessary to clean the electrode point 8 to prevent the liquid of the previous sample remaining on the electrode point 8 from interfering with the test result of the next time. To avoid this problem, in one embodiment, a water inlet 9 and a water outlet 10 are arranged at the bottom of the cavity, and one-way valves are arranged in both the water inlet 9 and the water outlet 10. Water enters the cavity as the piston 4 rises and drains as the piston 4 descends. The water in the cavity is used to clean the electrode point 8 on the detection rod 5 when the detection rod 5 rises with the piston 4;

[0041] Since there is a sliding contact between the piston 4 and the inner wall of the housing 3, when the piston 4 moves upward, a cavity will be formed inside the housing 3 at the bottom of the piston 4, and this cavity is in a negative pressure state. When there are a water inlet 9 and a water outlet 10 leading to the outside of the housing 3 in the cavity and a water supply pipe is connected, then after each detection by the detection rod 5, the detection rod 5 is moved upward by moving the piston 4 upward. At the same time, the negative pressure formed in the cavity will suck the water outside the water inlet 9 into the cavity to clean the electrode points 8 on the detection rod 5. After the cleaning is completed, the next sample will be detected. At this time, the piston 4 moves downward to push the detection rod 5 downward, and at the same time, the piston 4 discharges the waste liquid in the cavity through the water outlet 10 to the outside of the housing 3. In order to avoid interference between the liquid inlet and outlet actions of the water inlet 9 and the water outlet 10 in the two states, one-way valves are provided in both the water inlet 9 and the water outlet 10. The water in the water inlet 9 can only enter and cannot exit, while the water in the water outlet 10 can only exit and cannot enter. The up and down movement of the piston 4 not only moves the detection rod 5 up and down but also rotates the detection rod 5 through the driving part, and can also control the entry and exit of the liquid in the cavity to clean the electrode points 8, achieving multiple functional effects.

[0042] In order to enable the water in the cavity to clean the electrode points 8, in one embodiment, the annular vertical wall 11 is a hollow structure, and the water entering the cavity contacts the electrode points 8 along the hollow structure and cleans the electrode points 8.

[0043] In order to prevent the water in the cavity from being squeezed out of the opening at the bottom of the housing 3 due to high pressure during the downward movement and discharge of the piston 4, resulting in dripping onto the sample to be detected and causing sample contamination, in one embodiment, a sealing ring is embedded on the inner side surface of the annular vertical wall 11, and the sealing ring abuts against the side wall of the detection rod 5, making the contact between the annular vertical wall 11 and the detection rod 5 tighter through the sealing ring.

[0044] Working principle: The telescopic rod of cylinder 2 drives the piston 4 to move up and down within the housing 3. The up and down movement of the piston 4 drives the up and down movement of the detection rod 5. During the up and down movement of the detection rod 5, the external thread 12 on the detection rod 5 meshes with the internal thread on the annular vertical wall 11, causing the detection rod 5 to rotate while moving. Through the rotation of the detection rod 5, the fan blade 7 at the bottom breaks and disperses the bubbles and foam on the liquid surface, preventing the bubbles and foam from contacting the electrode point 8 of the detection rod 5. When the detection rod 5 rises, the piston 4 moves upward, creating a negative pressure in the cavity and sucking the water outside the water inlet 9 into the cavity for cleaning the electrode point 8 after the detection rod 5 is reset. During the process of the detection rod 5 descending again, the downward movement of the piston 4 will squeeze the water in the cavity out from the water outlet 10, completing the cleaning of the electrode point 8 of the detection rod 5. At the same time, the sealing ring on the annular vertical wall 11 can prevent the water droplets in the cavity from falling into the liquid sample to be detected, preventing contamination of the sample. By dispersing the foam and bubbles on the liquid surface and cleaning the electrode point 8, the detection accuracy of chloride ions can be improved, and the working efficiency can be enhanced simultaneously.

[0045] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An ion selective electrode for detecting chloride ions, characterized in that: The invention comprises a fixing plate, a lifting mechanism and a detection component, wherein the lifting mechanism is arranged on the fixing plate, the detection component is connected to the lower part of the lifting mechanism, the detection component comprises a shell, a piston and a detection rod, the shell is arranged on the fixing plate, an opening is arranged at the bottom of the shell, an annular wall is arranged vertically toward the inner side of the shell, a cavity is formed between the annular wall and the inner side wall of the shell, the piston is slidably arranged in the cavity and connected to the lifting mechanism, the top of the detection rod is rotatably engaged in the piston and extends out of the shell along the annular wall and the opening, a driving part is arranged between the annular wall and the side wall of the detection rod, the driving part drives the detection rod to rotate with the lifting of the piston, an electrode point is arranged on the side surface of the bottom of the detection rod, an umbrella-shaped head is connected to the bottom surface of the detection rod, and the umbrella-shaped head rotates with the detection rod to discharge the foam on the liquid surface; The diameter of the umbrella-shaped head is larger than the diameter of the detection rod; the driving part comprises an external thread opened on the side of the detection rod and an internal thread opened on the annular vertical wall, and the internal thread and the external thread are meshed with each other; A water inlet and a water outlet are provided at the bottom of the cavity, and a one-way valve is provided in each of the water inlet and the water outlet. Water enters the cavity as the piston rises, and water is discharged as the piston descends. The water in the cavity is used to clean the electrode points on the detection rod when the detection rod rises with the piston. The detection rod includes a large column section, which is rotatably embedded in the inner wall of the piston, and the top and bottom of the protruding part of the large column section are provided with balls that roll and abut against the top and bottom of the inner wall of the piston; A plurality of fan blades are arranged at the bottom of the umbrella-shaped head, and the plurality of fan blades are used to increase the stirring force on the liquid surface; Some of the fan blades are arc-shaped fan blades, and the fan blades rotate as the detection rod rotates. Some of the fan blades rotate in the forward direction as the detection rod descends, and some of the fan blades rotate in the reverse direction as the detection rod rises.

2. The ion selective electrode for detecting chloride ions according to claim 1, characterized in that: The annular vertical wall is a hollow structure.

3. The ion selective electrode for detecting chloride ions according to claim 1, characterized in that: The lifting mechanism is a cylinder, and the telescopic rod of the cylinder is connected to the top of the piston.

4. The ion selective electrode for detecting chloride ions according to claim 1, characterized in that: A sealing ring is embedded on the inner side surface of the annular vertical wall, and the sealing ring abuts against the side wall of the detection rod.

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