Anti-poisoning pH sensor of spiral reference electrode
By adopting a helical reference electrode, a dual-cavity structure and multiple salt rings in the pH sensor, the diffusion distance between poisoned ions in the medium reaches the electrode is extended, and the problem that existing pH sensors are difficult to apply for long-term industries in chemical industry, lithium batteries and other industries is solved, and a longer service life and higher measurement accuracy is achieved.
Patent Information
- Application Number
- CN202421164371.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-05-27
AI Technical Summary
Existing pH sensors cannot be used in production processes in chemical, lithium batteries and other industries for a long time, especially in environments containing heavy metal components, organic compounds, and strong acids and alkalis, making it difficult to effectively measure pH values.
An anti-poisoning pH sensor for spiral reference electrodes was designed, adopting a dual-cavity structure and multiple salt ring design, combined with a spiral external reference electrode, extending the diffusion distance between poisoned ions in the medium and improving the service life of the electrode.
This design significantly extends the service life of pH sensors in environments containing heavy metals and strong acid and alkali, and solves the problem that traditional pH sensors are difficult to apply for long-term times in these environments.
Smart Images
Figure CN222784475U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensors, in particular to a pH sensor of a spiral reference electrode which is resistant to poisoning. Background Art
[0002] The production processes of chemical industry, lithium battery and other industries usually contain heavy metal components and organic compounds, and strong acid and alkali and other occasions need to measure pH value online. The utility model belongs to the technical field of pH sensor, and in particular, it relates to an anti-poisoning pH sensor of spiral reference electrode;
[0003] There is a technical problem in the prior art that pH sensors cannot be used for a long time in the production processes of the chemical industry, lithium battery industry, etc., which usually contain heavy metal components, organic compounds, strong acids and alkalis, etc., and require online measurement of pH values.
[0004] Therefore, a pH sensor with a spiral reference electrode and anti-poisoning is needed to improve the above problems. Utility Model Content
[0005] The utility model aims to provide a pH sensor with a spiral reference electrode and anti-poisoning function, so as to solve the problems mentioned in the above background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A pH sensor with a spiral reference electrode and anti-poisoning, comprising a fixed shell, a glass shell being arranged at one end of the fixed shell, a threaded connector being arranged at the other end of the fixed shell, a wire being arranged on the outer wall of the threaded connector, an internal reference electrode being arranged on the inner wall of the glass shell, an external reference electrode being arranged on one side of the internal reference electrode and located on the inner wall of the glass shell, and the external reference electrode being a spiral structure, and a plurality of salt rings being arranged in sequence on one side of the external reference electrode and located on the outer wall of the internal reference electrode.
[0008] As a preferred solution of the utility model, the fixed shell and the glass shell form a double-cavity structure, and polytetrafluoroethylene diaphragms are provided at the ports of the double-cavity structure of the fixed shell and the glass shell.
[0009] As a preferred solution of the utility model, one side of the internal reference electrode and the inner cavity of the glass shell is filled with a saturated 3 mol / l KCL buffer solution or an organic-resistant buffer solution.
[0010] As a preferred solution of the utility model, a plurality of salt rings are sequentially arranged on the outer wall of the internal reference electrode.
[0011] As a preferred solution of the utility model, the internal reference electrode, the measuring electrode and the temperature electrode are all built into the measuring tube of the glass electrode to form an integrated glass pH measuring electrode.
[0012] As a preferred solution of the present invention, the glass shell is located on one side of the fixed shell.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. In the utility model, an anti-poisoning pH sensor is provided with a spiral reference electrode, and its external reference electrode is equipped with a plurality of salt reserves in the form of salt rings as standard, which makes the device particularly suitable for use in low-ion media or high flow rates. The salt reserves in the form of multiple salt rings help to increase the service life of the electrode. If electrode poisons such as sulfides are present in the measured medium, the extended diffusion path (due to two continuous chambers - a dual-chamber system) and double diaphragm separation can prevent electrode poisoning. The design of the spiral external reference electrode greatly extends the diffusion distance of poisoning ions in the medium to reach the external reference electrode, greatly extending the applicable working conditions and service life of the external reference electrode, thereby solving the technical problem in the prior art that pH sensors cannot be used for a long time in the production processes of chemical, lithium battery and other industries, which usually contain heavy metal components, organic compounds, strong acids and alkalis, etc., and require online measurement of pH values. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the structure of the utility model;
[0017] Figure 3 It is a side structural schematic diagram of the utility model.
[0018] In the figure: 1. fixed shell; 2. glass shell; 3. threaded connector; 4. wire; 5. internal reference electrode; 6. external reference electrode; 7. salt ring; 8. diaphragm. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0020] For examples, see Figure 1-3 , the utility model provides a technical solution:
[0021] A pH sensor with a spiral reference electrode and anti-poisoning, comprising a fixed shell 1, a glass shell 2 is arranged at one end of the fixed shell 1, a threaded connector 3 is arranged at the other end of the fixed shell 1, a wire 4 is arranged on the outer wall of the threaded connector 3, an internal reference electrode 5 is arranged on the inner wall of the glass shell 2, an external reference electrode 6 is arranged on one side of the internal reference electrode 5 and located on the inner wall of the glass shell 2, and the external reference electrode 6 is a spiral structure, and four salt rings 7 are arranged in sequence on one side of the external reference electrode 6 and located on the outer wall of the internal reference electrode 5.
[0022] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The fixed shell 1 and the glass shell 2 form a double-cavity structure, and a diaphragm 8 is arranged at the double-cavity structure ports of the fixed shell 1 and the glass shell 2. The inner cavity of the glass shell 2 located on one side of the internal reference electrode 5 is filled with a saturated 3 mol / l KCL buffer solution. Four salt rings 7 are arranged in sequence on the outer wall of the internal reference electrode 5. The internal reference electrode 5 is located on the inner side of the external reference electrode 6. The glass shell 2 is located on one side of the fixed shell 1.
[0023] Furthermore, the internal reference electrode 5 and the external reference electrode 6 (measuring electrode), the potential of the internal reference electrode 5 is constant, while the potential of the external reference electrode 6 will change according to the pH value of the solution. This change is achieved through a special glass film, which is very sensitive to the activity of hydrogen ions (H+). When the hydrogen ion concentrations on both sides of the glass film are different, a potential difference will be generated. This potential difference is the so-called pH potential. During the measurement process, the relative voltage between the signal electrode and the reference electrode is recorded. When the pH value of the measured solution is 7 (neutral solution), the output voltage is theoretically 0. If the solution is acidic or alkaline, the output voltage will become positive or negative accordingly. This voltage signal can then be processed by circuits such as operational amplifiers to obtain accurate pH readings.
[0024] The working process of the utility model: when the anti-poisoning pH sensor using the spiral reference electrode designed by the present invention is working, under the action of multiple salt rings 7 sequentially arranged on one side of the external reference electrode 6 and on the outer wall of the internal reference electrode 5, the external reference electrode 6 is equipped with salt reserves in the form of multiple salt rings 7 as standard, which makes the device particularly suitable for use in low ion media or high flow rates. The salt reserves in the form of multiple salt rings 7 help to increase the service life of the electrode. At the same time, the fixed shell 1 and the glass shell 2 form a double-cavity structure. Under the action of the diaphragm 8 arranged at the ports of the double-cavity structure of the fixed shell 1 and the glass shell 2, if there are electrode poisons such as sulfides in the measured medium, The extended diffusion path (due to two continuous chambers - a double-chamber system) and the separation of the double diaphragm 8 can prevent electrode poisoning. An external reference electrode 6 is provided on the inner wall of the glass shell 2, and the external reference electrode 6 is a spiral structure. The design of the spiral external reference electrode 6 greatly prolongs the diffusion distance of poisoning ions in the medium to reach the external reference electrode 6, and greatly prolongs the applicable working conditions and service life of the external reference electrode 6, thereby solving the technical problem in the prior art that pH sensors cannot be used for a long time in the production processes of the chemical industry, lithium battery and other industries, which usually contain heavy metal components, organic compounds, strong acids and alkalis, etc., and require online measurement of pH values.
[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A pH sensor with a spiral reference electrode and anti-poisoning properties, comprising a fixed housing (1), characterized in that: A glass shell (2) is arranged at one end of the fixed shell (1), a threaded connector (3) is arranged at the other end of the fixed shell (1), a wire (4) is arranged on the outer wall of the threaded connector (3), an internal reference electrode (5) is arranged inside the inner wall of the glass shell (2), an external reference electrode (6) is arranged on one side of the internal reference electrode (5) and located inside the glass shell (2), and the external reference electrode (6) is a spiral structure, and a plurality of salt rings (7) are arranged in sequence on one side of the external reference electrode (6) and located on the outer wall of the internal reference electrode (5).
2. The anti-poisoning pH sensor of the spiral reference electrode according to claim 1, characterized in that: The fixed shell (1) and the glass shell (2) form a double-chamber structure, and polytetrafluoroethylene diaphragms (8) are provided at the ports of the double-chamber structures of the fixed shell (1) and the glass shell (2).
3. The anti-poisoning pH sensor of the spiral reference electrode according to claim 1, characterized in that: One side of the internal reference electrode (5) and the inner cavity of the glass housing (2) is filled with a saturated 3 mol / l KCl buffer solution or a special organic-resistant buffer solution.
4. The anti-poisoning pH sensor of the spiral reference electrode according to claim 1, characterized in that: Four salt rings (7) are arranged in sequence on the outer wall of the internal reference electrode (5).
5. The anti-poisoning pH sensor of the spiral reference electrode according to claim 1, characterized in that: The internal reference electrode (5) is located on the inner side of the external reference electrode (6).
6. The anti-poisoning pH sensor of the spiral reference electrode according to claim 1, characterized in that: The glass housing (2) is located on one side of the fixed housing (1).