High-temperature-resistant and high-pressure-resistant industrial planar pH electrode with 10mm-diameter structure

Abstract

The utility model discloses a high-temperature-resistant and high-pressure-resistant industrial planar pH electrode with a diameter structure of 10mm. The high-temperature-resistant and high-pressure-resistant industrial planar pH electrode comprises an electrode shell (1), an electrode inner glass tube (5), a reference electrolyte (2), an open type liquid complexing part (3), a ceramic sand core liquid complexing part (4), a large-diameter flat membrane (6), an electrode inner reference solution (7), an Ag / AgCl reference electrode (8) and a reference system (9), an open liquid complexing part (3) and a ceramic sand core liquid complexing part (4) are arranged at one end of the electrode shell (1) and form a double-liquid complexing part structure, so that the pressure of the electrode is kept balanced in a high-temperature and high-pressure environment; and the large-diameter flat film (6) is fixed at the inner end of the electrode shell (1) and is manufactured by adopting a thick film, and the diameter of the large-diameter flat film (6) is 10mm. The electrode adopts a large-diameter membrane structure, so that the membrane impedance is effectively reduced under the condition that the requirement of measurement on the electrode structure is met.

Description

Technical Field

[0001] This utility model relates to an electrode, specifically a high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure. Background Technology

[0002] In industrial production processes, pH measurement is crucial for many fields, including chemical engineering, environmental protection, food processing, and power generation. Especially under complex conditions such as high temperature, high pressure, and the presence of solid particles, the stability and durability of pH sensors directly affect measurement accuracy and equipment lifespan. Currently, common pH electrode structures mainly include spherical glass bulb electrodes, cylindrical glass bulb electrodes, and planar electrodes. Spherical and cylindrical glass bulb electrodes are prone to damage due to their fragility in high-flow-rate or solid-particle-containing water samples, while planar electrodes, due to their structural advantages, are suitable for measurement environments with high impact.

[0003] Existing industrial planar pH electrodes typically use small-diameter glass membranes, but this design presents the following technical problems:

[0004] Traditional small-diameter pH glass membranes typically use HA (high impedance) membrane material, resulting in high membrane impedance, which affects the response speed and sensitivity of the electrode. In industrial measurement environments, electrodes with excessively high impedance are easily interfered with, leading to unstable measurement data and affecting measurement accuracy.

[0005] Traditional pH electrodes typically employ a single liquid junction structure. Under high temperature and high pressure conditions, it is difficult to balance the internal and external pressures of the electrode, which may lead to reference electrolyte leakage or liquid junction potential drift, affecting measurement stability and electrode lifespan.

[0006] Traditional planar electrodes mostly use exposed glass membrane structures. When measuring water samples with high flow rates and containing solid particles, the glass membrane is easily damaged by impact, leading to electrode failure and affecting the normal operation of the equipment.

[0007] Since pH electrode measurements rely on a reference system, in existing technologies, the diffusion path of the reference system for some electrodes is relatively short, making the reference structure susceptible to contamination. This causes the liquid junction potential to drift easily, affecting the long-term stability of pH measurements.

[0008] In summary, existing industrial pH electrodes still have many shortcomings in terms of membrane impedance, pressure balance, mechanical protection, and measurement stability, making it difficult to meet the long-term stable measurement requirements under high temperature, high pressure, and strong impact conditions. Therefore, there is an urgent need for a new industrial planar pH electrode structure that can reduce membrane impedance, optimize the pressure balance structure, improve the impact resistance of the glass membrane, and enhance measurement stability, in order to improve the reliability and applicability of the electrode. Summary of the Invention

[0009] To address the aforementioned issues, this invention provides a high-temperature, high-pressure resistant industrial planar pH electrode with a 10mm diameter structure. The electrode exhibits significant advantages in reducing membrane impedance, optimizing pressure balance, enhancing the impact resistance of the glass membrane, and improving measurement stability. It is better suited for industrial pH measurement environments characterized by high temperature, high pressure, high flow rate, and the presence of solid particles, thereby improving the reliability and service life of industrial pH detection and effectively overcoming the shortcomings of existing technologies.

[0010] This utility model is achieved through the following technical solution: a high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure, comprising an electrode shell, an inner glass tube, a reference electrolyte, an open liquid network section, a ceramic sand core liquid network section, a large-diameter flat membrane, an inner reference solution, an Ag / AgCl reference electrode, and a long diffusion reference system. The inner glass tube is provided inside the electrode shell, and the inner glass tube is filled with a reference electrolyte, which is a gel or a solid polymer, to reduce liquid leakage inside the electrode and improve its high-temperature and high-pressure resistance.

[0011] One end of the electrode shell is provided with an open liquid entanglement section and a ceramic sand core liquid entanglement section, which together form a dual liquid entanglement structure, so that the electrode can maintain pressure balance under high temperature and high pressure environment.

[0012] The large-diameter flat film is fixed to the inner end of the electrode shell. The large-diameter flat film is manufactured using a thick film method and has a diameter of 10 mm.

[0013] The outer surface of the large-diameter flat film is recessed by 0.5mm-5mm relative to the inner end face of the electrode shell, forming a protective barrier;

[0014] An Ag / AgCl reference electrode is installed inside the glass tube of the electrode. The reference electrode is immersed in an internal reference solution, which is a high-concentration KCl solution.

[0015] The reference system is connected to an Ag / AgCl reference electrode, and the reference system includes, but is not limited to, a silver ion trap, a long-lifetime reference solution, and a long diffusion path structure.

[0016] As a preferred technical solution, the reference system adopts a long diffusion path setting.

[0017] As a preferred technical solution, the liquid network section adopts an open structure.

[0018] As a preferred technical solution, the liquid network section II adopts a multi-layer microporous ceramic sand core structure.

[0019] As a preferred technical solution, the large-diameter flat membrane is made of HA membrane material.

[0020] As a preferred technical solution, the electrode shell is made of a corrosion-resistant material.

[0021] As a preferred technical solution, the electrode shell extends outward by 0.5mm-5mm relative to the large-diameter flat film to form an additional protective barrier.

[0022] The beneficial effects of this invention are: the pH electrode of this invention uses a large-diameter flat membrane (10mm), which effectively reduces membrane impedance and improves the response speed and sensitivity of the electrode compared with the traditional small-diameter pH glass membrane, making pH measurement more accurate.

[0023] Secondly, this electrode adopts a dual liquid junction structure with an open liquid junction section and a ceramic sand core liquid junction section. Under high temperature and high pressure, it can balance the pressure, reduce the loss of internal electrolyte, and prevent liquid junction potential drift, thereby improving the long-term measurement stability of the electrode.

[0024] In addition, the glass membrane of this electrode is recessed by 0.5mm-5mm relative to the outer shell, which can effectively resist the impact of high flow rates and water samples containing solid particles, reduce the risk of damage to the glass membrane, and significantly extend the service life of the electrode. At the same time, the reference system of this electrode includes a silver ion trap and a long diffusion path, which further improves the measurement stability and reduces the interference of the external environment on the measurement results. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the internal structure of this utility model. Detailed Implementation

[0028] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0029] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0030] like Figure 1 and Figure 2 As shown, this utility model relates to a high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure. The electrode includes an electrode shell 1, an inner glass tube 5, a reference electrolyte 2, an open liquid network section 3, a ceramic sand core liquid network section 4, a large-diameter flat membrane 6, an inner reference solution 7, an Ag / AgCl reference electrode 8, and a reference system 9. The inner glass tube 5 is located inside the electrode shell 1 and is filled with the reference electrolyte 2. The reference electrolyte 2 is a gel or solid polymer. Using this type of reference electrolyte effectively reduces the risk of liquid leakage, preventing rapid evaporation or leakage of the electrolyte solution under high temperature and high pressure conditions, while also improving the high-temperature and high-pressure resistance, enabling the electrode to operate stably for a long period.

[0031] One end of the electrode housing 1 is provided with an open liquid winding section 3 and a ceramic sand core liquid winding section 4, which together constitute a dual liquid winding section structure. The dual liquid winding section design can maintain pressure balance under high temperature and high pressure environments, avoiding electrode damage or measurement errors caused by uneven pressure.

[0032] The open-type liquid junction 3 employs a porous ceramic structure, enabling more uniform electrolyte diffusion, improving ion transport efficiency, and reducing liquid junction potential drift, thereby enhancing measurement accuracy and long-term stability. The ceramic sand core liquid junction 4 utilizes a multi-layer microporous structure, providing a larger ion diffusion area while exhibiting excellent corrosion resistance and pressure resistance, further enhancing the electrode's adaptability to harsh environments and ensuring normal operation under high temperature and high pressure conditions.

[0033] The core component of this electrode is a large-diameter flat film 6, which is fixed to the inner end of the electrode shell 1 and is manufactured using a thick film manufacturing process, with a diameter of 10mm.

[0034] Compared to traditional small-diameter glass bulb membranes, the large-diameter flat membrane 6 reduces membrane impedance, improves electrode sensitivity, and shortens response time during measurement, resulting in more accurate pH measurements. The flat membrane 6 design is also more suitable for industrial applications, especially in environments with high water flow rates or containing solid particles, reducing measurement errors and improving the reliability of measurement data.

[0035] To improve the durability of the glass membrane, the electrode design of this invention makes the outer surface of the large-diameter flat membrane 6 recessed by 0.5mm to 5mm relative to the inner end face of the electrode shell 1. This structure can form a protective barrier to effectively resist the impact of water flow and the direct impact of solid particles in the water sample on the glass membrane, thereby significantly extending the service life of the glass membrane 6.

[0036] Especially in high-flow-rate liquid environments, the recessed design can reduce the scouring effect of water on the electrode membrane surface, reduce the wear of the glass membrane 6, and improve the reliability and service life of the electrode.

[0037] An Ag / AgCl reference electrode 8 is housed within the glass tube 5 of the electrode assembly. This reference electrode 8 is immersed in an internal reference solution 7, which uses a high-concentration KCl solution. This provides a stable reference potential, reduces liquid junction potential drift, and improves the long-term stability of the measurement. The use of a high-concentration KCl solution effectively reduces ion diffusion impedance, enhances the anti-interference capability of the reference system 9, and ensures that the electrode maintains a stable operating state under complex environments.

[0038] The reference system 9 is connected to the Ag / AgCl reference electrode 8, including but not limited to silver ion traps, long-lifetime reference solutions, and long diffusion path structures.

[0039] The silver ion trap effectively reduces excessive silver ion loss, extends the lifespan of the reference electrode 8, and reduces silver ion contamination of the measurement environment. The long diffusion path design helps reduce the liquid junction potential drift of the reference electrode 8, improving the long-term measurement stability of the electrode, making it particularly suitable for long-term online monitoring and pH measurement applications under high temperature and high pressure conditions.

[0040] To further improve the durability of the electrode, the electrode housing 1 is made of corrosion-resistant material to ensure that it can resist acid and alkali corrosion for a long time in industrial application environments, thereby improving the overall stability and reliability of the electrode.

[0041] In addition, the electrode shell 1 extends outward by 0.5 mm to 5 mm relative to the large-diameter flat film 6. This structure further enhances the mechanical protection performance of the electrode, effectively protecting the glass film 6 from external impacts and abrasions in harsh environments, and improving the service life of the electrode.

[0042] This novel pH electrode, through the design of a large-diameter flat membrane 6, a dual-liquid complex structure, and an optimized reference system 9, exhibits higher measurement accuracy and stability under high temperature and high pressure environments. It also improves the electrode's durability and adaptability, enabling it to be widely used in pH measurement scenarios in industries such as chemical, environmental protection, and power. This solves the problems of traditional pH electrodes being easily damaged and having unstable measurements under high temperature and high pressure, high flow rate, and water sample environments containing solid particles.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure, comprising an electrode shell (1), an inner glass tube (5), a reference electrolyte (2), an open liquid network section (3), a ceramic sand core liquid network section (4), a large-diameter flat membrane (6), an inner reference solution (7), an Ag / AgCl reference electrode (8), and a reference system (9), characterized in that: The electrode shell (1) is provided with an inner glass tube (5) inside, and the inner glass tube (5) is filled with a reference electrolyte (2), which is a gel or a solid polymer. The electrode shell (1) is provided with an open liquid network section (3) and a ceramic sand core liquid network section (4) at one end, which together form a double liquid network section structure, so that the electrode can maintain pressure balance under high temperature and high pressure environment. The large-diameter flat film (6) is fixed to the inner end of the electrode shell (1). The large-diameter flat film (6) is manufactured using a thick film method and has a diameter of 10 mm. The outer surface of the large-diameter flat film (6) is recessed by 0.5mm-5mm relative to the inner end face of the electrode shell (1) to form a protective barrier; An Ag / AgCl reference electrode (8) is provided inside the glass tube (5) of the electrode. The reference electrode (8) is immersed in the reference solution (7) inside the electrode. The reference solution (7) inside the electrode is a high-concentration KCl solution. The reference system (9) is connected to the Ag / AgCl reference electrode (8). The reference system (9) includes, but is not limited to, a silver ion trap, a long-lifetime reference solution, and a long diffusion path structure.

2. The high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure according to claim 1, characterized in that: The reference system (9) is configured with a long diffusion path.

3. The high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure according to claim 1, characterized in that: The open liquid network section (3) adopts a porous ceramic structure.

4. The high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure according to claim 1, characterized in that: The ceramic core liquid coating section (4) adopts a multi-layer microporous structure.

5. The high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure according to claim 1, characterized in that: The large-diameter flat membrane (6) is made of HA membrane material.

6. The high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure according to claim 1, characterized in that: The electrode shell (1) is made of corrosion-resistant material.

7. The high-temperature and high-pressure resistant industrial planar pH electrode with a 10mm diameter structure according to claim 1, characterized in that: The electrode shell (1) extends outward by 0.5 mm to 5 mm relative to the large-diameter flat film (6) to form an additional protective barrier.

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