Acid and alkali resistant pH composite electrode
By using a combined structure of a cone-head sealing plug and a locking bolt in a pH composite electrode, the problem of insufficient sealing of the liquid filling hole is solved, and a stable seal of the electrode is achieved to prevent leakage.
Patent Information
- Application Number
- CN202422450904.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-10-11
AI Technical Summary
The liquid filling hole of the existing pH composite electrode is not sealed well and is prone to leakage due to loosening.
A combined structure of a cone-head sealing plug and a locking bolt is adopted, and the elastic plate and the locking bolt cooperate to achieve a reinforced seal on the liquid adding hole.
The sealing performance of the liquid filling hole is improved to prevent leakage caused by looseness and ensure the stable use of the electrode.
Smart Images
Figure CN223461513U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of pH detection, more specifically, to an acid and alkali resistant pH composite electrode. BACKGROUND
[0002] The pH composite electrode is an electrode for measuring the acidity and alkalinity of a solution, which mainly consists of two parts: an inner reference electrode and an outer reference electrode. The electrode head is composed of a sensitive membrane sensitive to H+, and the inside of the sensitive membrane is an inner buffer solution. The outer reference electrode is mainly composed of an electrolyte containing potassium chloride. When the composite electrode enters the solution, the glass sensitive membrane will exchange ions with the ions in the solution to be measured. This exchange causes a change in the internal potential, and the pH value of the solution is calculated by measuring the potential difference between the two electrodes.
[0003] The molten liquid inside the composite electrode needs to be replaced after a period of use. The composite electrode of the prior art seals the liquid addition hole by a rubber plug at the end, but the sealing effect of the rubber plug alone is limited and may loosen after a long period of use. SUMMARY
[0004] 1. Technical problem to be solved
[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an acid and alkali resistant pH composite electrode which can reinforce the sealing plug to improve the sealing performance of the liquid addition hole.
[0006] Technical scheme
[0007] To solve the above problems, the utility model adopts the following technical scheme.
[0008] An acid and alkali resistant pH composite electrode comprises an outer shell and an outer reference electrode, the outer shell top is screwed with an end cover, the outer shell inside upper part is filled with a rubber plug, the outer shell inside center is penetrated by a glass tube, the glass tube bottom is provided with a sensitive membrane ball head, the glass tube inside is connected with an electric wire A, the outer shell one side upper part is provided with a boss, the boss surface lower part is provided with a liquid addition hole, the liquid addition hole is penetrated through the outer shell inside, the liquid addition hole is placed below the rubber plug, the boss outer side upper part is rotatably installed with an elastic plate, the elastic plate inner side lower part is provided with a tapered head sealing plug, the tapered head sealing plug is pressed and sealed to the liquid addition hole, the elastic plate surface is provided with a through slot, the through slot inside is penetrated by a locking bolt, the boss outer side surface is provided with an internal thread hole, the internal thread hole is placed between the elastic plate rotation shaft and the liquid addition hole, and the locking bolt end part is matched with the internal thread hole inside size.
[0009] Further, the outer reference electrode is installed inside the outer shell, the outer reference electrode is placed below the rubber plug, and the outer reference electrode is parallel to the glass tube axis.
[0010] Further, the outer reference electrode is internally filled with a glue layer, and the outer reference electrode is internally injected with an internal shock liquid.
[0011] Further, the outer reference electrode is internally provided with an electric wire B, the electric wire B penetrates the glue layer, and the outer reference electrode is provided with a ceramic core at the bottom.
[0012] Further, the electric wire A and the electric wire B are both silver wires, and the electric wire A and the electric wire B are provided with Ag-Ag d plating layers at the bottom ends.
[0013] Further, the outer reference electrode is coated with a sealing film. Beneficial effects
[0014] Compared with the prior art, the acid and alkali resistant pH composite electrode has the advantages that a sealing plug is plugged in and unplugged outside a liquid adding hole, and the sealing plug is reinforced through cooperation of an elastic plate and a locking bolt, so that the stability of the sealing plug is ensured, and the leakage phenomenon caused by loosening is prevented. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a sectional view structural schematic diagram of the utility model;
[0016] Figure 2 It is a shell body three-dimensional structure schematic diagram of the utility model;
[0017] Figure 3 It is an outer reference electrode three-dimensional structure schematic diagram of the utility model;
[0018] Figure 4 It is an A area of the utility model Figure 1 Amplification structure schematic diagram.
[0019] Mark number explanation in the drawing: 1, shell body; 11, boss; 12, internal thread hole; 13, liquid adding hole; 14, elastic plate; 15, taper head sealing plug; 16, through slot; 17, locking bolt; 2, rubber plug; 3, end cover; 4, glass tube; 41, sensitive film ball head; 42, electric wire A; 5, outer reference electrode; 51, glue layer; 52, electric wire B; 53, ceramic core. DETAILED DESCRIPTION
[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model; obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. EMBODIMENT
[0021] Please refer to Figure 1 and Figure 4 As shown in FIG. 1, an acid and alkali resistant pH composite electrode includes an outer shell 1 and an outer reference electrode 5. An end cap 3 is screwed on the top of the outer shell 1 to seal the outer shell 1 and prevent dust from entering. A rubber plug 2 is filled in the upper part of the inner part of the outer shell 1 to prevent internal liquid from seeping out through the top. A glass tube 4 is penetrated through the center of the inner part of the outer shell 1. The glass tube 4 is a measuring electrode. A sensitive film ball head 41 is arranged at the bottom of the glass tube 4. The glass sensitive film will exchange with ions in the solution to be measured. This exchange causes a change in the internal potential to achieve measurement. An electric wire A 42 is connected inside the glass tube 4. A boss 11 is arranged on the upper side of the outer shell 1. A liquid adding hole 13 is formed in the surface of the boss 11 below to facilitate the replacement of the internal liquid through the liquid adding hole 13. The liquid adding hole 13 is penetrated through the inner part of the outer shell 1. An elastic plate 14 is rotatably installed on the upper side of the outer side of the boss 11. The rotating shaft of the elastic plate 14 is arranged above the boss 11 so that the elastic plate 14 can rotate. When the elastic plate 14 is vertically downward, a conical head sealing plug 15 corresponds to the position of the liquid adding hole 13. The conical head sealing plug 15 is arranged on the inner side of the elastic plate 14 below. The conical structure of the conical head sealing plug 15 can control the extrusion force to improve the sealing performance. The conical head sealing plug 15 extrudes and seals the liquid adding hole 13. A through groove 16 is formed in the surface of the elastic plate 14. A locking bolt 17 is penetrated through the through groove 16. An internal thread hole 12 is formed in the surface of the outer side of the boss 11. The extrusion of the elastic plate 14 is realized by the cooperation of the locking bolt 17 and the internal thread hole 12 to improve the extrusion of the conical head sealing plug 15. The internal thread hole 12 is arranged between the rotating shaft of the elastic plate 14 and the liquid adding hole 13. The end of the locking bolt 17 is matched with the inner size of the internal thread hole 12.
[0022] Please refer to Figure 1 As shown in FIG. 2, the outer reference electrode 5 is installed in the inner part of the outer shell 1. The outer reference electrode 5 is arranged below the rubber plug 2. The outer reference electrode 5 is parallel to the axis of the glass tube 4 to form a loop.
[0023] Please refer to Figure 3 As shown in FIG. 3, a rubber layer 51 is filled in the upper part of the inner part of the outer reference electrode 5. The inner reference liquid is injected into the inner part of the outer reference electrode 5. The rubber layer 51 can seal the outer reference electrode 5. Otherwise, the inner reference liquid will leak. An electric wire B 52 is arranged in the inner part of the outer reference electrode 5. The electric wire B 52 is penetrated through the rubber layer 51. A ceramic core 53 is arranged at the bottom of the outer reference electrode 5.
[0024] The electric wire A 42 and the electric wire B 52 are both silver wires. Ag-Ag doped layers are arranged at the bottom ends of the electric wire A 42 and the electric wire B 52 to improve the conductivity.
[0025] Please refer to Figure 1As shown, the outer reference electrode 5 is coated with a sealing film, which is a polyethylene / polyvinylpyrrolidone film, so that the solid electrolyte is tightly attached to the glass wall, and when m(PVA):m(PVP)=1:0.5, the film section is dense and uniform, and the two have good compatibility, and the film made of the composite has acid and alkali resistance, chemical stability and thermal stability, so as to improve the sealing property and prevent the outer reference system from being contaminated and the electrode measurement from being inaccurate.
[0026] Working principle: when in use, the liquid adding hole 13 can be sealed by the conical head sealing plug 15, and the elastic plate 14 can be extruded by the rotation of the locking bolt 17 and the internal threaded hole 12, so as to maintain the extrusion degree of the conical head sealing plug 15 and ensure the sealing property; when the internal liquid needs to be replaced, the locking bolt 17 can be unscrewed, the conical head sealing plug 15 can be pulled out by the elasticity of the elastic plate 14, and the conical head sealing plug 15 can be rotated by the rotating shaft at the top of the elastic plate 14, so that the conical head sealing plug 15 is offset from the liquid adding hole 13, and the internal liquid can flow out through the liquid adding hole 13 or new liquid can be injected into the internal housing 1 through the liquid adding hole 13.
[0027] The above is only a preferred specific embodiment of the present application; however, the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and improvement concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. An acid and alkali resistant pH combination electrode comprising an outer housing (1) and an outer reference electrode (5), characterized in that: The outer shell (1) top screw cover (3), the outer shell (1) inside upper filling with rubber plug (2), the outer shell (1) inside center through glass tube (4), the glass tube (4) bottom is provided with sensitive film ball head (41), the glass tube (4) inside is connected with electric wire A (42), the outer shell (1) one side upper is provided with boss (11), the boss (11) surface lower opening has liquid hole (13), the liquid hole (13) with outer shell (1) inside through, the liquid hole (13) is placed below rubber plug (2), the boss (11) outside upper rotary mounting has elastic plate (14), the elastic plate (14) inside lower is provided with taper head sealing plug (15), the taper head sealing plug (15) to liquid hole (13) extrusion sealing, the elastic plate (14) surface opening has through slot (16), the through slot (16) inside through has locking bolt (17), the boss (11) outside surface opening has internal thread hole (12), the internal thread hole (12) is placed between elastic plate (14) rotation axis and liquid hole (13), the locking bolt (17) end and internal thread hole (12) inside size is adapted.
2. The acid and alkali resistant pH composite electrode according to claim 1, characterized in that: The outer reference electrode (5) is installed in the outer shell (1), the outer reference electrode (5) is placed below the rubber plug (2), and the outer reference electrode (5) is parallel to the axis of the glass tube (4).
3. The acid and base resistant pH composite electrode according to claim 2, wherein: The outer reference electrode (5) is filled with a glue layer (51) inside the upper, the outer reference electrode (5) is injected with inner liquid.
4. The acid and alkali resistant pH composite electrode according to claim 3, characterized in that: The outer reference electrode (5) is provided with an electric wire B (52) inside, the electric wire B (52) through the glue layer (51), the outer reference electrode (5) bottom is provided with ceramic core (53).
5. The acid and base resistant pH composite electrode according to claim 4, wherein: The electric wire A (42) and electric wire B (52) are all silver wire, and the electric wire A (42) and electric wire B (52) bottom end are provided with Ag-Agd plating.
6. The acid and base resistant pH composite electrode according to claim 1, wherein: The outer reference electrode (5) surface is smeared with sealing film.