Clamp for measuring ionic conductivity of exchange membrane

Abstract

The utility model discloses an exchange membrane ionic conductivity measuring clamp, which comprises a first clamp part, a second clamp part, a third clamp part, a fourth clamp part, a fifth clamp part and a sixth clamp part, wherein the first clamp part comprises a first press-fit block and two second press-fit blocks; the two second pressing blocks are detachably and separately arranged on the same surface of the second clamp part; the first pressing blocks are movably arranged on the same face and located between the two second pressing blocks. The magnetic attraction structure is arranged on the first pressing block and the second clamp part; the two electrodes are respectively fixed on the second clamp part through the two second pressing blocks; and the first pressing block and the second clamp part are magnetically attracted and fixed through two magnetic attraction structures. According to the invention, the exchange membrane can be quickly mounted on the clamp. A magnetic attraction mode is adopted for fastening, and under the condition that exchange membranes with the same thickness are selected, it can be guaranteed that the fastening force is the same every time of assembly; meanwhile, the mounting speed of the exchange membrane is increased, and measurement errors are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the measurement field of anion exchange membrane, particularly to an exchange membrane ion conductivity measurement clamp. BACKGROUND

[0002] The measurement of ion conductivity is crucial for developing new anion exchange membranes with high performance and long service life. The measurement of ion conductivity is related to the width and thickness of the anion exchange membrane and the final measured ohmic resistance. The width and thickness of the anion exchange membrane and the final measured ohmic resistance are related to the extrusion force it receives. However, the clamps on the market are mostly bolted, which can only achieve fastening and cannot guarantee that the extrusion force received by the anion exchange membrane during each measurement is consistent, resulting in inaccurate measurement results. Meanwhile, installing the membrane sample requires screwing multiple screws, which is time-consuming and can easily lead to carbonation of the anion exchange membrane sample, resulting in smaller ion conductivity results. SUMMARY

[0003] Therefore, it is necessary to provide an exchange membrane ion conductivity measurement clamp that can improve the efficiency and accuracy of anion exchange membrane ion conductivity measurement.

[0004] An exchange membrane ion conductivity measurement clamp comprises:

[0005] A first clamp part, which comprises a first pressing block and two second pressing blocks;

[0006] A second clamp part, wherein the two second pressing blocks are detachably and separately arranged on the same face of the second clamp part;

[0007] The first pressing block is movably arranged between the two second pressing blocks and can be attached to the second clamp part;

[0008] A magnetic attraction structure, which is arranged on the first pressing block and the second clamp part;

[0009] Two electrodes, which are respectively fixed to the second clamp part through the two second pressing blocks;

[0010] The first pressing block and the second clamp part are magnetically attracted and fixed through the magnetic attraction structure.

[0011] Optionally, the magnetic attraction structure comprises a first magnetic attraction structure and a second magnetic attraction structure;

[0012] The first magnetic attraction structure is arranged on the first pressing block;

[0013] The second magnetic attraction structure is arranged on the second clamp part.

[0014] Optionally, the first magnetic attraction structure comprises a first magnet and a first magnetic attraction hole.

[0015] The first magnet is arranged in the first magnetic attraction hole.

[0016] Optionally, the second magnetic attraction structure comprises a second magnet and a second magnetic attraction hole.

[0017] The second magnet is arranged in the second magnetic attraction hole.

[0018] Optionally, further comprising a fixing structure, the two second pressing blocks are fixed to the second clamp part through the fixing structure.

[0019] Optionally, the fixing structure comprises a threaded hole and a bolt.

[0020] The threaded hole is arranged in the second pressing block and the second clamp part.

[0021] Optionally, further comprising a positioning structure, the positioning structure is used for realizing positioning installation of the electrode on the first clamp part and the second clamp part.

[0022] Optionally, the positioning structure is a positioning groove.

[0023] Optionally, further comprising a first observation hole and a second observation hole.

[0024] The first observation hole is arranged in the first pressing block.

[0025] The second observation hole is arranged in the second clamp part.

[0026] The utility model provides a kind of exchange membrane ion conductivity measurement fixture, comprising first clamp part, second clamp part and magnetic attraction structure, first clamp part includes first pressing block and two second pressing blocks;Magnetic attraction structure is arranged in first pressing block and second clamp part;First pressing block and second clamp part are fixed by magnetic attraction structure magnetic attraction, so that exchange membrane is fixed between first pressing block and second clamp part. Tighten in the way of magnetic attraction, in the case where the same thickness is selected anion exchange membrane, it can guarantee that each assembly tightening force is same, reduces measurement error;While improving the installation speed of anion exchange membrane, reduce the influence of carbonation on ion conductivity test. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in these drawings without creative labor.

[0028] Fig. 1 Figure 1 is a structural schematic diagram of an exchange membrane ion conductivity measurement fixture according to an embodiment;

[0029] Fig. 2 Figure 2 is an exploded structural schematic diagram of an exchange membrane ion conductivity measurement fixture according to an embodiment;

[0030] Fig. 3 Figure 3 is another exploded structural schematic diagram of an exchange membrane ion conductivity measurement fixture according to an embodiment.

[0031] Wherein, 1, first fixture part; 11, first pressing block; 12, second pressing block; 2, second fixture part; 31, first magnet; 32, first magnetic attraction hole; 33, second magnet; 34, second magnetic attraction hole; 4, threaded hole; 5, positioning groove; 6, electrode; 7, exchange membrane; 8, first observation hole; 9, second observation hole.

[0032] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0035] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three schemes, for example, A and / or B includes A technical scheme, B technical scheme, and A and B simultaneously meet the technical scheme; in addition, the technical schemes of each embodiment can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical schemes appears contradictory or unachievable, it should be considered that the combination of technical schemes does not exist, nor is it within the scope of protection required by the present application.

[0036] Reference Figs. 1-3 The application provides a kind of exchange membrane ionic conductivity measurement fixture, which comprises first fixture part 1, second fixture part 2, magnetic attraction structure and two electrodes 6, first fixture part 1 includes first pressing block 11 and two second pressing blocks 12;Two second pressing blocks 12 are detachably arranged on the same face of second fixture part 2;First pressing block 11 is movably arranged between two second pressing blocks 12, and can be attached with second fixture part 2;Magnetic attraction structure is arranged in first pressing block 11 and second fixture part 2 respectively;Two electrodes 6 are fixed on second fixture part 2 by two second pressing blocks 12 respectively;First pressing block 11 and second fixture part 2 are magnetically attracted and fixed by magnetic attraction structure.When used, exchange membrane 7 is placed between two second pressing blocks 12 on second fixture part 2, and the two ends of exchange membrane 7 are connected with two electrodes 6 respectively, and the first pressing block 11 is magnetically attracted and fixed on the second fixture part 2 between two second pressing blocks 12, which can realize the quick installation and disassembly of exchange membrane 7 on the fixture.In actual measurement, an electric field is formed between two electrodes 6, and exchange membrane 7 is placed in the electric field, so that the measurement of ionic conductivity can be carried out.

[0037] In the embodiment, the materials of first pressing block 11, two second pressing blocks 12 and second fixture part 2 can be PSU, PTFE, PEEK and other engineering plastics.The exchange membrane ionic conductivity measurement fixture provided by the application can be applied to the measurement of ionic conductivity of anion exchange membrane.

[0038] In the embodiment, the magnetic attraction structure includes first magnetic attraction structure and second magnetic attraction structure;First magnetic attraction structure is arranged in first pressing block 11;Second magnetic attraction structure is arranged in second fixture part 2.First magnetic attraction structure includes first magnet 31 and first magnetic attraction hole 32;First magnet 31 is arranged in first magnetic attraction hole 32.Second magnetic attraction structure includes second magnet 33 and second magnetic attraction hole 34;Second magnet 33 is arranged in second magnetic attraction hole 34.

[0039] Specifically, the first magnetic suction hole 32 and the second magnetic suction hole 34 are blind holes, and the openings are respectively on the upper side of the first pressing block 11 and the lower side of the second clamp part 2, and do not penetrate to the side of the contact exchange film 7. In other embodiments, the openings can also be on other faces of the first pressing block 11 and the second clamp part 2. The number of the first magnetic suction hole 32 is four, and the four first magnetic suction holes 32 are arranged in a rectangular manner on the first pressing block 11; correspondingly, the number of the second magnetic suction hole 34 is four, and the second magnetic suction hole 34 is arranged on the second clamp part 2. Strong magnets are placed in the first magnetic suction hole 32 and the second magnetic suction hole 34 according to the principle of opposite sex attraction, and then sealed with fluorine glue. After the fluorine glue is dry, the surface of the magnetic suction hole is trimmed to be flat. The exchange film 7 or the film sample is fastened by the strong magnets in a magnetic suction manner through the first pressing block 11 of the first clamp part 1 and the second clamp part 2. After each measurement, the first pressing block 11 is disassembled, and the sample of the exchange film 7 can be replaced. The structure of the present application is simple, and the assembly and disassembly are fast. The time of exposing the film sample to air can be shortened to within ten seconds, and the influence of carbonation on ion conductivity testing is reduced. The measurement is accurate. In the case of selecting film samples with the same thickness, the same fastening force can be ensured during each assembly, and the measurement error is reduced.

[0040] In the present embodiment, the measurement clamp further comprises a positioning structure, and the positioning structure is used to realize the positioning installation of the electrode 6 on the first clamp part 1 and the second clamp part 2. The positioning structure is a positioning groove 5.

[0041] Specifically, the number of the positioning groove 5 is multiple. For example, the number of the positioning groove 5 is four. Two of the positioning groove 5 are oppositely arranged on the same face of the second clamp part 2 for installing the first pressing block 11 and the second pressing block 12; the other two positioning grooves 5 are arranged on the two second pressing blocks 12. During assembly, the two electrodes 6 are arranged in the two positioning grooves 5 of the second clamp part 2, respectively. The positioning grooves 5 of the two second pressing blocks 12 are correspondingly matched with the different positioning grooves 5 on the second clamp part 2. The space formed by the matching is adapted to the electrode 6. The two second pressing blocks 12 are arranged on the second clamp part 2 to realize the positioning installation of the electrode 6. Alternatively, the number of the positioning groove 5 is two, and the two positioning grooves 5 are oppositely arranged on the same face of the second clamp part 2 for installing the first pressing block 11 and the second pressing block 12. The size of the positioning groove 5 is adapted to the size of the electrode 6. The two electrodes 6 are arranged in the two positioning grooves 5, respectively. The upper surfaces of the two electrodes 6 are flush with the upper surface of the second clamp part 2. Then the two second pressing blocks 12 are arranged on the second clamp part 2 to position and install the two electrodes 6 on the clamp.

[0042] In the present embodiment, the measurement clamp further comprises a fixing structure, and the two second pressing blocks 12 are fixed to the second clamp part 2 through the fixing structure. The fixing structure comprises a threaded hole 4 and a bolt; the threaded hole 4 is arranged on the second pressing block 12 and the second clamp part 2.

[0043] Specifically, the number of threaded holes 4 is multiple. For example, the number of threaded holes 4 is eight, which is divided into three groups. One group of four threaded holes 4, two by two, is respectively arranged through the two ends of the second clamp part 2, and the openings are arranged from one side of the second clamp part 2 to the other side; one group of two threaded holes 4 is respectively arranged through one second compression block 12; the other group of two threaded holes 4 is respectively arranged through the other second compression block 12. Two electrodes 6 are arranged in two positioning grooves 5 on the second clamp part 2, respectively, and the threaded holes 4 on the second clamp part 2 and the threaded holes 4 on the second compression block 12 are corresponded one by one, and the second clamp part 2 and the second compression block 12 are fastened by bolts. After assembly, it is not necessary to disassemble every time the exchange membrane is replaced, and it is only necessary to install and disassemble the first compression block 11. It should be noted that the threaded holes 4 of the present embodiment can also be through holes without threads, and the threaded rods pass through the through holes and are fastened by nuts.

[0044] In the present embodiment, a first observation hole 8 and a second observation hole 9 are also included; the first observation hole 8 is arranged on the first compression block 11; the second observation hole 9 is arranged on the second clamp part 2. Specifically, the first compression block 11 is provided with the first observation hole 8; the second clamp part 2 is provided with the second observation hole 9 corresponding to the first observation hole 8. The first observation hole 8 and the second observation hole 9 are used to observe the position state of the exchange membrane 7. Specifically, as shown in the figure, Figs. 1-2 The first observation hole 8 is a square hole through the first compression block 11, and the first observation hole 8 is arranged at the center of the first compression block 11, and four first magnetic attraction holes 32 are arranged at the four corners of the periphery of the first observation hole 8. The second observation hole 9 is a square hole through the second clamp part 2, and the second observation hole 9 is arranged at the center of the second clamp part 2, and four second magnetic attraction holes 34 are arranged at the four corners of the periphery of the second observation hole 9.

[0045] The present patent application is a method for installing and using an exchange membrane 7 ion conductivity measuring clamp:

[0046] 1. Two electrodes 6 are arranged in two positioning grooves 5 on the second clamp part 2, respectively, two second compression blocks 12 are pressed on two electrodes 6 in turn, and then the threaded holes 4 in the second clamp part 2 and the second compression block 12 are tightened in turn, to complete the installation of the second compression block 12 and the electrode 6 on the clamp.

[0047] 2. The exchange membrane 7 is arranged on the second clamp part 2 between the two second compression blocks 12, and the two ends of the exchange membrane 7 are connected with the two electrodes 6, respectively. The first compression block 11 is magnetically fixed on the second clamp part 2 between the two second compression blocks 12, to complete the fastening of the sample of the exchange membrane 7.

[0048] 3. After completing the sample measurement of the exchange membrane 7, the first pressing block 11 of the first clamping part 1 can be disassembled and removed to replace the sample. Repeating steps 1 and 2, different samples of the exchange membrane 7 can be measured.

[0049] This patent application discloses a test method for measuring the ionic conductivity of an exchange membrane 7.

[0050] 1. Prepare 5L of deionized water that has been aerated with nitrogen for more than two hours. Complete the ion exchange of the sample from the exchange membrane 7 in sodium hydroxide solution, then quickly remove it and wash it in the aerated water more than 5 times.

[0051] 2. Remove the first pressing block 11 of the first clamping part 1, quickly replace it with the membrane sample to be measured, then place the first pressing block 11 in place, and finally place the entire clamping part in the aerated water.

[0052] 3. Connect the fixture to the electrochemical workstation via wires, and set the appropriate mode and frequency range to perform ionic conductivity testing.

[0053] This testing method is simple and efficient, and can obtain accurate results without operating in a glove box.

[0054] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A membrane ion conductivity measurement fixture, characterized by, The utility model relates to a kind of exchange membrane ion conductivity measurement clamps, including: First clamp part, the first clamp part includes first pressing block and two second pressing blocks; Second clamp part, the two second pressing blocks are detachably fixed on the same face of the second clamp part; The first pressing block is movably arranged between the two second pressing blocks, and can be attached with the second clamp part; Magnetic attraction structure, the magnetic attraction structure is arranged in the first pressing block and the second clamp part; Two electrodes, the two electrodes are fixed on the second clamp part by the two second pressing blocks respectively; The first pressing block and the second clamp part are magnetically attracted and fixed by the magnetic attraction structure.

2. The exchange membrane ion conductivity measurement clamp according to claim 1, wherein: The magnetic attraction structure includes a first magnetic attraction structure and a second magnetic attraction structure; The first magnetic attraction structure is arranged in the first pressing block; The second magnetic attraction structure is arranged in the second clamp part.

3. The exchange membrane ion conductivity measurement clamp according to claim 2, wherein: The first magnetic attraction structure includes a first magnet and a first magnetic attraction hole; The first magnet is arranged in the first magnetic attraction hole.

4. The exchange membrane ion conductivity measurement clamp according to claim 2, wherein: The second magnetic attraction structure includes a second magnet and a second magnetic attraction hole; The second magnet is arranged in the second magnetic attraction hole.

5. The exchange membrane ion conductivity measurement clamp according to claim 2, further comprising a fixing structure, wherein: The two second pressing blocks are fixed on the second clamp part by the fixing structure.

6. The exchange membrane ion conductivity measurement clamp according to claim 5, wherein: The fixing structure includes a threaded hole and a bolt; The threaded hole is arranged in the second pressing block and the second clamp part.

7. The exchange membrane ion conductivity measurement clamp according to claim 2, further comprising a positioning structure, wherein: The positioning structure is used to realize the positioning installation of the electrode on the first clamp part and the second clamp part.

8. The exchange membrane ion conductivity measurement clamp according to claim 7, wherein: The positioning structure is a positioning groove.

9. The exchange membrane ion conductivity measurement clamp according to claim 1, further comprising a first observation hole and a second observation hole, wherein: The first observation hole is arranged in the first pressing block; The second observation hole is arranged in the second clamp part. ​

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