CN219737359U

CN219737359U - PVC membrane ion selective electrode structure

Info

Publication number: CN219737359U
Application number: CN202321307453.XU
Authority: CN
Inventors: 潘再君
Original assignee: Jiangsu Haile Plastic Co ltd
Current assignee: Jiangsu Haile Plastic Co ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2023-09-22
Anticipated expiration: 2033-05-26

Abstract

The utility model relates to the technical field of electrochemical detection sensors and discloses a PVC (polyvinyl chloride) membrane ion selective electrode structure, which comprises a shell, wherein the interior of the shell is divided into a working electrode chamber and a reference electrode chamber which are not communicated with each other, a through hole is formed in the upper end of the shell, a first fixed block is fixedly connected in the corresponding through hole, the working electrode chamber is provided with a working electrode, the working electrode is fixedly communicated with the first fixed block, the lower end of the first fixed block is fixedly connected with a second fixed block, one side of the second fixed block is fixedly connected with the reference electrode, and the inner wall of the lower end of the shell is fixedly connected with a measuring chamber. The utility model is provided with the independent separation of each part, which is not communicated with each other, and the electrode chambers and the measuring chamber are not mutually affected, so that the utility model has high use reliability, good sealing effect and difficult leakage of electrolyte solution.

Description

PVC membrane ion selective electrode structure

Technical Field

The utility model relates to the technical field of electrochemical detection sensors, in particular to a PVC membrane ion selective electrode structure.

Background

The ion selective electrode is an electrochemical sensor for measuring the activity (concentration) of ions in a solution by utilizing a membrane potential, the electrode membrane has selective response to specific ions, the sensitive membrane of the electrode generates potential after the electrode contacts with the solution to be measured, and the membrane potential is theoretically related to the logarithm of the activity of the ions to be measured and accords with a Nernst equation. However, many ion selective electrodes, such as pH electrodes, are currently manufactured using glass rods to make the electrode body, and once the electrode fails in its components (e.g., the sensitive membrane or reference electrode is damaged), the entire electrode is scrapped and cannot be repaired.

The patent with the publication number of CN205229096U is searched to propose a PVC membrane ion selective electrode structure, the PVC membrane ion selective electrode structure comprises an electrode shell and a PVC membrane, an electrode inner solution is arranged in an inner cavity of the electrode shell, one end of the PVC membrane arranged in the inner cavity of the electrode shell is used for blocking the inner cavity of the electrode shell, and a PVC membrane baffle is tightly stuck to one side of the inner cavity of the electrode shell.

This patent can prevent the damage that the PVC membrane naturally sunken leads to after the electrode was placed for a long time, but application scope is little, does not possess the pole division room function, when needs a large amount of PVC membranes, probably can cause the reading to beat or drift's problem, is not applicable to the popularization.

Disclosure of Invention

The utility model aims to solve the problem that when a large number of PVC films are needed, reading jumping or drifting can be caused because the function of a polarization chamber is not provided in the prior art, and provides a PVC film ion selection electrode structure.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a PVC membrane ion selective electrode structure, includes the shell, the inside working electrode room and the reference electrode room that are cut apart into each other not to communicate of shell, the through-hole has been seted up to the shell upper end, and corresponds the first fixed block of through-hole internal fixation, the working electrode room is provided with working electrode, working electrode and the fixed intercommunication of first fixed block, first fixed block lower extreme fixedly connected with second fixed block, second fixed block one side fixedly connected with reference electrode, shell lower extreme inner wall fixedly connected with measuring chamber, and working electrode extends to measuring chamber, the shell lower extreme can be dismantled and be connected with the apron, the screw hole has been seted up on the apron surface, and corresponds the screw hole internal rotation and be connected with the bolt, can make the apron dismantle through installing bolt and apron, and the apron can protect the PVC membrane under non-operating condition simultaneously, and the apron can be as the container that holds standard ion solution liquid for soak PVC membrane head, keeps detecting the precision.

Preferably, the reference electrode and the working electrode are silver wires, silver chloride is electroplated at the end parts of the silver wires, and polarization voltage can be restrained by generating silver chloride on the surface of the silver wires, and stable potential is measured, so that accuracy is improved.

Preferably, the reference electrode chamber is filled with a solution, wherein the solution is a saturated potassium chloride solution added with agar, and the agar has coagulability so that the solution cannot flow out.

Preferably, the PVC membrane baffle is fixedly connected with one end of the measuring chamber, the PVC membrane is fixedly connected with one side of the PVC membrane baffle, and the structure is stable and the wind resistance is high.

Preferably, the PVC membrane baffle is a circular plate, and a plurality of small holes are uniformly distributed on the circular plate, so as to ensure that the solution in the electrode is fully contacted with the PVC membrane 11.

Preferably, the diameter of the small hole is 1mm, so that the outflow of the PVC film is prevented.

Preferably, the PVC membrane barrier is made of polycarbonate or polyethylene or polyvinylchloride or epoxy or polyoxymethylene or polyphenylene sulfide or plexiglass or polypropylene, which is very dense and therefore very hard and very resistant to impact deformation relative to other plastics.

Preferably, the inner side of the shell is fixedly connected with annular anti-diarrhea cotton, so that the leakage of internal liquid can be prevented.

Preferably, the outer wall of the shell is sprayed with a layer of polytetrafluoroethylene material, so that the service time of the device is prolonged.

Preferably, the through hole is formed in the side wall of the shell, and the connecting block is fixedly connected in the corresponding through hole, so that the device is more stable.

Compared with the prior art, the utility model provides a PVC membrane ion selective electrode structure, which has the following beneficial effects:

1. this PVC membrane ion select electrode structure can make the apron detachable through installing bolt and apron, and the apron can protect the PVC membrane under non-operating condition, and the apron can be as holding the container of standard ionic solution liquid simultaneously for soak PVC membrane head, keep detecting the precision, when the indoor solution of measurement long-term use leads to ion concentration to change, can make solution concentration return to standard state through soaking in the apron.

2. This PVC membrane ion selection electrode structure, through each part independent separation setting, each other not communicate, each electrode room does not influence each other between with the measuring chamber, and the use reliability is high to sealed effectual, electrolyte solution is difficult for the seepage, and the PVC membrane can increase its selectivity through adding different active material, and the suitability is stronger.

The device has the advantages that the parts which are not involved in the device are the same as or can be realized by adopting the prior art, the parts are independently arranged in a separated way and are not communicated with each other, the electrode chambers and the measuring chamber are not mutually affected, the use reliability is high, the sealing effect is good, and the electrolyte is not easy to leak.

Drawings

FIG. 1 is a schematic plan view of a PVC membrane ion selective electrode structure according to the present utility model;

fig. 2 is an enlarged schematic diagram of a portion a of an ion selective electrode structure of a PVC membrane according to the present utility model.

In the figure: 1. a housing; 2. a working electrode chamber; 3. a reference electrode chamber; 4. a first fixed block; 5. a second fixed block; 6. a reference electrode; 7. a measuring chamber; 8. a cover plate; 9. a bolt; 10. a PVC membrane baffle; 11. a PVC film; 12. a small hole; 13. annular diarrhea-stopping cotton; 14. a connecting block; 15. a working electrode.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1:

referring to fig. 1-2, the PVC membrane ion selective electrode structure of the present utility model includes a housing 1, the interior of the housing 1 is divided into a working electrode chamber 2 and a reference electrode chamber 3 which are not communicated with each other, a through hole is provided at the upper end of the housing 1, and a first fixing block 4 is fixedly connected in the corresponding through hole, the working electrode chamber 2 is provided with a working electrode 15, the working electrode 15 is fixedly communicated with the first fixing block 4, the lower end of the first fixing block 4 is fixedly connected with a second fixing block 5, one side of the second fixing block 5 is fixedly connected with a reference electrode 6, the inner wall of the lower end of the housing 1 is fixedly connected with a measuring chamber 7, the working electrode 15 extends into the measuring chamber 7, a cover plate 8 is detachably connected to the lower end of the housing 1, a threaded hole is provided on the surface of the cover plate 8, and a bolt 9 is connected in the corresponding threaded hole, the reference electrode 6 and the working electrode 15 are silver wires, silver chloride is electroplated at the end of the silver wires, the reference electrode chamber 3 is filled with a solution, and the solution is a saturated potassium chloride solution added with agar.

Example 2:

based on the embodiment 1, referring to fig. 1-2, the PVC membrane ion selective electrode structure comprises a PVC membrane baffle 10 fixedly connected with one end of a measuring chamber 7, a PVC membrane 11 fixedly connected with one side of the PVC membrane baffle 10, a plurality of small holes 12 uniformly distributed on the PVC membrane baffle 10, wherein the diameter of the small holes 12 is 1mm, the PVC membrane baffle 10 is made of polycarbonate, polyethylene, polyvinyl chloride, epoxy resin, polyoxymethylene, polyphenylene sulfide or organic glass or polypropylene, annular anti-diarrhea cotton 13 is fixedly connected with the inner side of a shell 1, a layer of polytetrafluoroethylene material is sprayed on the outer wall of the shell 1, through holes are formed in the side wall of the shell 1, and a connecting block 14 is fixedly connected in the corresponding through holes.

In the utility model, the shell comprises a sleeved cylindrical outer tube and a cylindrical inner tube, the two ends of the space between the outer tube and the inner tube are sealed by end connecting pieces to form a reference electrode chamber 3, the inner side of the inner tube forms a working electrode chamber 2, the working electrode chamber 2 and the reference electrode chamber 3 are not communicated with each other, a working electrode 15 is arranged in the working electrode chamber 2, a reference electrode 6 is arranged in the reference electrode chamber 3, the working electrode chamber 4 is not communicated with the outside of the shell 1, one end of the shell 1 is provided with a measuring chamber 7, the reference electrode chamber 3 is filled with a solution which is a saturated potassium chloride solution added with agar, the working electrode chamber 2 is filled with an insulating material for fixing an electrode, the reference electrode 6 and the working electrode 15 are silver wires, silver chloride is electroplated at the ends of the silver wires, polarization voltage can be restrained, stable potential can be measured, the precision can be improved, and the PVC membrane baffle 10 is a circular plate which is uniformly distributed with a plurality of small holes 12 can ensure that the solution in the electrode is fully contacted with the PVC membrane 11.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a PVC membrane ion selective electrode structure, includes shell (1), its characterized in that, shell (1) inside is cut apart into working electrode room (2) and reference electrode room (3) that are not intercommunicated, through-hole has been seted up to shell (1) upper end, and corresponds first fixed block (4) of through-hole internal fixation, working electrode room (2) are provided with working electrode (15), working electrode (15) and first fixed block (4) fixed intercommunication, first fixed block (4) lower extreme fixedly connected with second fixed block (5), second fixed block (5) one side fixedly connected with reference electrode (6), shell (1) lower extreme inner wall fixedly connected with measuring chamber (7), and working electrode (15) extend to measuring chamber (7) in, shell (1) lower extreme detachably is connected with apron (8), threaded hole has been seted up on apron (8) surface, and corresponds screw hole rotation and be connected with bolt (9).

2. The PVC membrane ion selective electrode structure of claim 1, wherein the reference electrode (6) and the working electrode (15) are silver wires, and the ends of the silver wires are plated with silver chloride.

3. The PVC membrane ion selective electrode structure according to claim 1, wherein the reference electrode chamber (3) is filled with a solution which is a saturated potassium chloride solution added with agar.

4. The PVC membrane ion selective electrode structure according to claim 1, wherein one end of the measuring chamber (7) is fixedly connected with a PVC membrane baffle (10), and one side of the PVC membrane baffle (10) is fixedly connected with a PVC membrane (11).

5. The PVC membrane ion selective electrode structure of claim 4, wherein the PVC membrane baffle (10) is a circular plate having a plurality of small holes (12) uniformly distributed thereon.

6. A PVC membrane ion selective electrode structure according to claim 5, wherein the apertures (12) are 1mm in diameter.

7. The PVC membrane ion selective electrode structure according to claim 4, wherein the PVC membrane baffle (10) is made of polycarbonate or polyethylene or polyvinylchloride or epoxy or polyoxymethylene or polyphenylene sulfide or plexiglass or polypropylene.

8. The PVC membrane ion-selective electrode structure as claimed in claim 1, wherein annular anti-diarrhea cotton (13) is fixedly connected to the inner side of the housing (1).

9. A PVC membrane ion selective electrode structure according to claim 1, wherein the outer wall of the housing (1) is sprayed with a layer of polytetrafluoroethylene material.

10. The PVC membrane ion selective electrode structure according to claim 1, wherein the side wall of the housing (1) is provided with a through hole, and a connection block (14) is fixedly connected in the corresponding through hole.