CN212228800U - Diaphragm type residual chlorine sensor - Google Patents
Diaphragm type residual chlorine sensor Download PDFInfo
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- CN212228800U CN212228800U CN202020467128.XU CN202020467128U CN212228800U CN 212228800 U CN212228800 U CN 212228800U CN 202020467128 U CN202020467128 U CN 202020467128U CN 212228800 U CN212228800 U CN 212228800U
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Abstract
The utility model provides a diaphragm type residual chlorine sensor, which comprises a counter electrode, a working electrode and a selective permeation membrane, and also comprises a shell component, an electrode component and a membrane component; the electrode assembly comprises a mounting section I and a mounting section II which are connected into a whole; one end of the mounting section I is hermetically connected with the shell assembly, and the other end of the mounting section I is hermetically connected with the membrane assembly; the counter electrode and the working electrode are arranged on the mounting section II; an electrolyte containing cavity is formed in the membrane assembly, and the mounting section II, the counter electrode and the working electrode are arranged in the electrolyte containing cavity; the membrane component is provided with a detection port communicated with the electrolyte containing cavity, and the detection port is provided with a selective permeation membrane. The diaphragm type residual chlorine sensor has the advantages of simple and convenient assembly, exquisite structure, high detection precision and high production efficiency.
Description
Technical Field
The utility model relates to a chlorine residue detects technical field, specific theory has related to a diaphragm type chlorine residue sensor.
Background
Water is an indispensable important resource in human survival and production life, and with the progress of science and technology and the development of industry, the development and utilization of water resources are more and more extensive, but the problem of water pollution is more and more severe. As most of domestic water of people comes from natural water resources, the disinfection treatment of water is the best way for ensuring healthy water supply of people. Chlorine was found to be an effective disinfectant for drinking water in the early 20 th century, and the chlorine disinfection method is still a widely used water disinfection method at present due to the characteristics of strong sterilization capability, low price, simple operation, easy use and the like. As chlorine is used for disinfection, certain concentration value in water needs to be kept, too low concentration does not have sterilization capability, and too high concentration causes damage to human body; therefore, after the chlorine disinfection method is adopted, the concentration of residual chlorine in water needs to be detected.
Currently, methods for detecting residual chlorine mainly include an iodometric method, a DPD method (DPD, i.e., N-diethyl-p-phenylenediamine), an o-tolidine colorimetric method (OT method), and an on-line detection method of a residual chlorine sensor, and since the first three methods are off-line detection methods and cannot detect the content of residual chlorine in water in real time, the on-line detection of the residual chlorine sensor has gradually become a common means for detecting residual chlorine in recent years.
The residual chlorine sensor is divided into a constant voltage type sensor (bare electrode) and a diaphragm type polarographic type sensor (membrane electrode) based on an electrochemical principle, and the membrane electrode sensor is less interfered by a detected solution and other components, so that the residual chlorine sensor is more and more widely applied. The diaphragm type polarographic sensor (membrane electrode) consists of a cathode, an anode, an electrolyte and a gas-permeable film covered on the cathode. The residual chlorine in the measured solution is diffused to the cathode through the diaphragm, the proper polarization voltage between the cathode and the anode can reduce the residual chlorine on the cathode, and the chemical reactions generate current in direct proportion to the residual chlorine in the measured solution.
In the prior art, a diaphragm type polarographic sensor is of an integrated structure, an insulator is arranged in the middle of the integrated structure, and electrolyte is filled between the insulator and an external shell; the cathode is arranged in the insulator, the anode is arranged at the edge of the insulator and is contacted with the electrolyte outside the insulator, and the sensor structure has the defect of low production efficiency caused by complex assembly structure.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims at the defects of the prior art, thereby providing a diaphragm type residual chlorine sensor.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a diaphragm type residual chlorine sensor comprises a counter electrode, a working electrode and a selective permeation membrane, and also comprises a shell component, an electrode component and a membrane component;
the electrode assembly comprises a mounting section I and a mounting section II which are connected into a whole; one end of the mounting section I is hermetically connected with the shell assembly, and the other end of the mounting section I is hermetically connected with the membrane assembly; the counter electrode and the working electrode are arranged on the mounting section II;
an electrolyte containing cavity is formed in the membrane assembly, and the mounting section II, the counter electrode and the working electrode are arranged in the electrolyte containing cavity;
the membrane component is provided with a detection port communicated with the electrolyte containing cavity, and the detection port is provided with a selective permeation membrane.
The utility model discloses relative prior art has substantive characteristics and progress, specific theory:
1) the utility model discloses a diaphragm type residual chlorine sensor, which is provided with a shell component, an electrode component and a membrane component, wherein a counter electrode and a working electrode are arranged on an installation section II of the electrode component, electrolyte is arranged in an electrolyte containing cavity of the membrane component, and the electrode component is hermetically connected with the shell component and the membrane component, thereby greatly improving the production efficiency; meanwhile, the installation and the replacement of the counter electrode, the working electrode and the electrolyte are convenient;
2) set up at least one mar on the contact surface of counter electrode and electrolyte, increased the contact surface area of counter electrode and electrolyte to avoid the counter electrode to take place the polarization, shorten sensor stabilization time.
3) The reaction area ratio of the working electrode to the counter electrode is 1: 50-1: 200 or other ratios, so that the reaction area ratio of the working electrode to the counter electrode is optimally configured, the residual current is reduced, and the accuracy of the sensor is improved;
4) the selective permeation membrane is fixedly arranged on the end cover, the end cover is connected with the bottom of the membrane component, when the selective permeation membrane is replaced, the whole membrane component does not need to be replaced, and only the end cover needs to be taken down for replacement, so that the cost is saved;
5) the bottom of the membrane component is provided with a plurality of outward extending lugs which play a role in protecting the selective passing membrane, thereby prolonging the service life of the selective passing membrane.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an explosion diagram of the present invention.
Fig. 3 is a cross-sectional view of the present invention.
Fig. 4 is an exploded view of the present invention.
In the figure: 1. a housing assembly; 2. a membrane module; 3. a connecting member; 4. a counter electrode; 5. a working electrode; 6. mounting a section I; 7. mounting a section II; 8. a sealing gasket; 9. an electrolyte containing chamber; 10. selectively permeable membranes.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Example 1
As shown in fig. 1 to 4, a diaphragm type residual chlorine sensor includes a counter electrode 4, a working electrode 5 and a selective permeation membrane 10; also comprises a shell component 1, an electrode component and a membrane component 2; the electrode assembly comprises a mounting section I6 and a mounting section II 7 which are integrally connected; one end of the mounting section I6 is hermetically connected with the shell component 1, and the other end of the mounting section I is hermetically connected with the membrane component 2; the counter electrode 4 and the working electrode 5 are arranged on the mounting section II 7; an electrolyte containing cavity 9 is formed in the membrane assembly 2, and the mounting section II 7, the counter electrode 4 and the working electrode 5 are arranged in the electrolyte containing cavity 9; the membrane module 2 is provided with a detection port communicated with the electrolyte accommodating cavity 9, and the detection port is provided with a selective permeation membrane 10.
Furthermore, lead through holes which are communicated with each other are formed in the mounting section I6 and the mounting section II 7 of the electrode assembly, and a through groove which is communicated with the lead through holes is formed in the shell assembly 1, so that a counter electrode lead and a working electrode lead can be led out for signal transmission; the shell assembly is also connected with a connecting piece 3 so as to be connected with other components such as a converter and the like; in particular, the connector 3 can adopt a G3/4 standard fitting.
Furthermore, an annular groove for placing the counter electrode 4 is formed in the side face of the mounting section II 7, the counter electrode 4 can be a rectangular electrode, and the rectangular electrode is arranged in the annular groove in an enclosing mode to form a cylindrical electrode matched with the annular groove. The end part of the mounting section II 7 is provided with a circular groove for placing the working electrode 5, and the working electrode 5 is a circular electrode matched with the circular groove.
Furthermore, the diaphragm type residual chlorine sensor adopts the principle of electrochemical polarography, inert electrodes with stable properties such as gold, platinum, palladium and the like are used as working electrodes, metals with active properties such as silver, silver chloride, lead and the like are used as counter electrodes, and the working electrodes and the counter electrodes jointly form detection electrodes of the residual chlorine sensor; the two electrodes are put together in a specific electrolyte and separated from the solution to be detected by a selective permeation membrane, and residual chlorine in the solution is detected under a polarization potential.
In the assembling process, the counter electrode 4 and the working electrode 5 are respectively arranged on the mounting section II 7, electrolyte is filled in the electrolyte containing cavity 9 of the membrane component 2, the mounting section I6 is spirally arranged in the shell component 1, the other end of the mounting section I is spirally arranged in the membrane component 2, and the shell component 1 and the electrode component and the membrane component 2 are hermetically connected; meanwhile, the installation and the replacement of the counter electrode, the working electrode and the electrolyte are convenient.
Furthermore, a sealing washer 8 is arranged at the joint between the installation section I6 and the membrane module 2 to ensure that the installation section I6 and the membrane module 2 are in sealing connection, and the liquid leakage phenomenon is avoided.
In this embodiment, one end of the mounting section i 6 is in threaded connection with the housing assembly 1, and the other end is in threaded connection with the membrane assembly 2. In other embodiments, other connection manners such as snap-fit connection may also be adopted between the housing assembly 1 and the electrode assembly, and between the electrode assembly and the membrane assembly 2, and the embodiment is not limited herein.
Example 2
This example differs from example 1 in that: at least one scratch is arranged on the contact surface of the counter electrode 4 and the electrolyte.
It is understood that polarization is a state in which the surface charge is supersaturated. When the diaphragm type residual chlorine sensor works, the polarization time of a working electrode needs to be shortened, and the polarization time of a counter electrode needs to be prolonged. Therefore, in this embodiment, at least one scratch is formed on the counter electrode 4 to increase the contact surface area with the electrolyte. Theoretically, the charges can be collected to the sharp surface, and the larger the contact surface area of the counter electrode 4 and the electrolyte is, the more difficult the polarization is; therefore, the polarization time of the counter electrode is prolonged, the polarization time of the working electrode is shortened, and the purpose of shortening the stabilization time of the sensor is achieved.
Further, the counter electrode may be a wire electrode; for example, the filament electrode can be a silver wire wound in the annular groove of the mounting section ii 7, and the contact surface area between the counter electrode and the electrolyte can also be increased, so as to achieve the purpose of prolonging the polarization time of the counter electrode.
Example 3
The present embodiment differs from the above embodiments in that: the reaction area ratio of the working electrode 5 to the counter electrode 4 is 1: 180; in the embodiment, the reaction area ratio of the working electrode to the counter electrode is optimized to reduce the residual current, improve the accuracy and obtain a better test result in the test of the residual chlorine sample.
In other embodiments, the ratio of the reaction area of the working electrode to the counter electrode may also be 1:150, 1:170, or 1: 200.
Example 4
The present embodiment differs from the above embodiments in that: the diaphragm type residual chlorine sensor also comprises an end cover which is connected with the detection port in a sealing way, and the selective permeation membrane is fixedly arranged on the end cover.
The embodiment provides a specific implementation mode of a membrane module, wherein the membrane module comprises a cylindrical hollow shell and an end cover, wherein one end of the cylindrical hollow shell is provided with an internal thread, and the mounting section I6 is provided with an external thread matched with the internal thread; the other end of the cylindrical hollow shell is provided with an external thread, and the end cover is provided with an internal thread matched with the external thread.
In the embodiment, the membrane component structure is improved, an end cover structure is added, and the selective permeation membrane is fixedly arranged on the end cover; when the electrolyte needs to be replaced, the end cover can be opened for replacement, and the whole membrane assembly does not need to be taken down; when the selective permeation membrane needs to be replaced, only the end cover and the selective permeation membrane need to be replaced, and the whole membrane component does not need to be replaced; therefore, the structure of the sensor is optimized and the cost is saved.
Furthermore, a sealing gasket is arranged between the end cover and the cylindrical hollow shell, so that the sealing performance between the end cover and the cylindrical hollow shell is improved, and the liquid leakage phenomenon is prevented.
Further, the selectively permeable membrane is generally composed of hydrophobic polyethylene, polyperfluoroethylpropylene, polyvinyl chloride, polytetrafluoroethylene, or the like.
Example 5
The present embodiment differs from the above embodiments in that: as shown in fig. 2, the membrane module 2 or the bottom of the end cap is provided with a plurality of outward extending projections, and the projections play a role of protecting the selective passing membrane, so that the service life of the selective passing membrane is prolonged.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (10)
1. A diaphragm type residual chlorine sensor comprises a counter electrode, a working electrode and a selective permeation membrane, and is characterized in that: also includes a housing assembly, an electrode assembly and a membrane assembly;
the electrode assembly comprises a mounting section I and a mounting section II which are connected into a whole; one end of the mounting section I is hermetically connected with the shell assembly, and the other end of the mounting section I is hermetically connected with the membrane assembly; the counter electrode and the working electrode are arranged on the mounting section II;
an electrolyte containing cavity is formed in the membrane assembly, and the mounting section II, the counter electrode and the working electrode are arranged in the electrolyte containing cavity;
the membrane component is provided with a detection port communicated with the electrolyte containing cavity, and the detection port is provided with a selective permeation membrane.
2. The diaphragm-type residual chlorine sensor according to claim 1, wherein: lead wire through holes which are communicated with each other are formed in the mounting section I and the mounting section II, and through grooves communicated with the lead wire through holes are formed in the shell assembly.
3. The diaphragm-type residual chlorine sensor according to claim 1, wherein: and an annular groove for placing the counter electrode is formed in the side surface of the mounting section II.
4. The diaphragm-type residual chlorine sensor according to claim 1, wherein: and a circular groove for placing the working electrode is formed in the end part of the mounting section II, and the working electrode is a circular electrode matched with the circular groove.
5. The diaphragm-type residual chlorine sensor according to claim 1, wherein: at least one scratch is arranged on the contact surface of the counter electrode and the electrolyte.
6. The diaphragm-type residual chlorine sensor according to claim 1, wherein: the reaction area ratio of the working electrode to the counter electrode is 1:50 to 1: 200.
7. The diaphragm-type residual chlorine sensor according to claim 1, wherein: the reaction area ratio of the working electrode to the counter electrode is 1: 180.
8. The diaphragm-type residual chlorine sensor according to claim 5, wherein: one end of the mounting section I is arranged in the shell component in a rotating mode, and the other end of the mounting section I is arranged in the membrane component in a rotating mode; and a sealing washer is arranged at the joint between the mounting section I and the membrane component.
9. The diaphragm-type residual chlorine sensor according to claim 1, wherein: the selective permeation membrane is fixedly arranged on the end cover.
10. The diaphragm-type residual chlorine sensor according to claim 1, wherein: and a plurality of lugs extending outwards are arranged at the bottom of the membrane component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020467128.XU CN212228800U (en) | 2020-04-02 | 2020-04-02 | Diaphragm type residual chlorine sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020467128.XU CN212228800U (en) | 2020-04-02 | 2020-04-02 | Diaphragm type residual chlorine sensor |
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| CN212228800U true CN212228800U (en) | 2020-12-25 |
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| CN202020467128.XU Active CN212228800U (en) | 2020-04-02 | 2020-04-02 | Diaphragm type residual chlorine sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946024A (en) * | 2021-01-27 | 2021-06-11 | 宁波水表(集团)股份有限公司 | Method for testing measurement characteristics of residual chlorine sensor |
| CN114740065A (en) * | 2022-03-16 | 2022-07-12 | 杭州凯米斯物联传感科技有限公司 | MEMS residual chlorine electrode for detecting tap water |
-
2020
- 2020-04-02 CN CN202020467128.XU patent/CN212228800U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946024A (en) * | 2021-01-27 | 2021-06-11 | 宁波水表(集团)股份有限公司 | Method for testing measurement characteristics of residual chlorine sensor |
| CN112946024B (en) * | 2021-01-27 | 2023-09-15 | 宁波水表(集团)股份有限公司 | Method for checking measurement characteristics of residual chlorine sensor |
| CN114740065A (en) * | 2022-03-16 | 2022-07-12 | 杭州凯米斯物联传感科技有限公司 | MEMS residual chlorine electrode for detecting tap water |
| CN114740065B (en) * | 2022-03-16 | 2024-05-03 | 杭州凯米斯物联传感科技有限公司 | MEMS residual chlorine electrode for detecting tap water |
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