Rapid clamping four-electrode membrane conductivity test clamp

Abstract

The utility model provides a rapid clamping four-electrode membrane conductivity test fixture, and belongs to the technical field of test fixtures. Comprising a placing plate; the placing groove is formed in the placing plate, and the placing groove is used for containing a to-be-tested film; the fixing block is detachably mounted on the placing plate, and the fixing block is used for fixing one end of a to-be-tested film on the placing plate; the sliding block is detachably arranged in the placing groove in a sliding manner; and the flexible roll shaft is rotationally arranged in the sliding block. Through the cooperation of the placing plate, the fixing block, the flexible roll shaft, the sliding block and other structures, the purpose of ensuring the flatness of a film to be detected in the clamping process is achieved, and through the cooperation of the extrusion plate, the sleeve, the sleeve rod, the knob and other structures, the film to be detected is always kept flat when making contact with an electrode slice, and the detection accuracy is improved. Therefore, the to-be-detected film is prevented from generating radian after being contacted with the electrode plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to test fixture technical field, especially in a kind of quick clamping four electrode membrane conductivity test fixture. BACKGROUND

[0002] The film to be measured has important applications in many fields, such as in electrochemical devices, water treatment and chemical production, etc. Its ionic conductivity is one of the key indicators for evaluating the performance of the film to be measured, and accurately measuring the ionic conductivity of the film to be measured is crucial for ensuring the efficiency and quality of related applications. In order to obtain accurate conductivity data, measurements need to be taken in a specific test environment.

[0003] When detecting the conductivity of the film to be measured, the film to be measured needs to be clamped by a clamp, and then placed in water or a constant temperature and humidity chamber for testing, and then the resistance value is tested by the AC impedance method to obtain the ionic conductivity. However, the existing clamp has obvious deficiencies in clamping the film to be measured. Since the film to be measured is soft, it is easy to bend when clamped by the clamp. Once the film to be measured is bent, wrinkles will be produced, which will change the shape of the film to be measured in the test environment, and thus affect the accuracy of the conductivity test of the film to be measured. Such deviation in test results may lead to incorrect evaluation of the performance of the film to be measured, affecting its selection and use in actual applications. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of providing a quick clamping four electrode membrane conductivity test fixture to solve the problem of soft film to be measured bending and producing wrinkles during clamping with the clamp, which affects the accuracy of test results. At the same time, because the electrode sheet is set in a convex shape, it will cause the film to be measured to produce an arc after covering the electrode sheet, which will affect the actual effective test area of the film to be measured.

[0005] The utility model discloses a kind of quick clamping four-electrode membrane conductivity test fixtures, including: placing plate;Placement groove is opened in placing plate, the placement groove is used to contain measured membrane;Fixed block, detachably installed on placing plate, the fixed block is used to fix the one end of measured membrane on placing plate;Sliding block, detachably slidingly arranged in placement groove;Flexible roller, rotationally arranged in sliding block, the surface of the flexible roller is contacted with the surface of measured membrane in placement groove, the flexible roller is used to flatten measured membrane in placement groove, wherein placing plate is made of material with high chemical stability and insulation, such as polytetrafluoroethylene (PTFE);The shape and size of placement groove are designed according to the specifications of common measured membrane, the depth thereof is moderate, which can ensure stable placement of the membrane and facilitate the contact and flattening of the flexible roller, the groove wall can be frosted to increase friction, preventing the membrane from sliding excessively in the groove;The bottom of fixed block can be detachably installed by magnetic attraction, which is convenient and fast, and the magnetic attraction strength is sufficient to cope with slight vibration during testing, ensuring that the one end of the membrane is securely fixed;The material of flexible roller is selected from silica gel, which is soft and will not scratch the membrane, and the diameter and length thereof are adapted to the placement groove, the surface can be provided with fine horizontal lines to enhance the flattening effect on the membrane, a micro bearing is installed inside to ensure smooth rotation, and a fixing device can also be provided on placing plate to position the sliding block after sliding, such as fixing the sliding block by bolt, and a ratchet wheel can be provided at the connection between flexible roller and sliding block, so that the flexible roller can only rotate in one direction when needed.

[0006] In a further embodiment, a sliding groove is opened on both sides of the placement groove, one end of the sliding groove near the fixed block penetrates the placing plate, and the penetration opening is on the same plane as the opening of the placement groove, the opening direction of the sliding groove is the same as the opening direction of the placement groove, and the sliding groove is used to limit the sliding track of the fixed block, wherein the width of the sliding groove is slightly larger than the width of the sliding part of the fixed block, to ensure smooth sliding of the fixed block without shaking, and the depth can be set to half of the thickness of the fixed block, to limit and facilitate disassembly;The inner wall of the sliding groove can be coated with molybdenum disulfide lubricant to reduce the sliding friction resistance of the fixed block and improve the clamping efficiency;The edge of the penetration opening is polished into a round corner to prevent scratching when the fixed block is inserted and removed, and the sliding groove as a whole can be set as L-shaped.

[0007] In a further embodiment, the fixed plate is rotatably arranged on one side of the placing plate; the extrusion plate is slidably arranged on the fixed plate, and the extrusion plate is arranged on the side of the fixed plate in contact with the placing plate, wherein the fixed plate is connected with the placing plate through a hinge, the hinge is made of stainless steel, is rust-proof and flexible in rotation, and the opening and closing angle can reach 180 degrees, facilitating the operation of the extrusion plate; the sliding direction of the extrusion plate is perpendicular to the placing groove, and the sliding stroke of the extrusion plate can cover the width of the placing groove, so as to ensure overall pressure on the film to be tested; a rubber pad can be attached to the surface of the extrusion plate to increase the friction with the film and prevent the film from shifting during extrusion, and because the rubber pad itself has a certain elasticity, it can fix other positions of the film to be tested when the electrode sheet contacts the film to be tested.

[0008] In a further embodiment, the electrode sheet is provided with four electrode sheets equally spaced, the electrode sheet is arranged in the extrusion plate, and the electrode sheet protrudes from the side of the extrusion plate away from the fixed plate, wherein the fixed connection between the electrode sheet and the extrusion plate can adopt an embedded injection molding process, the electrode sheet is pre-placed in the corresponding position of the extrusion plate mold, and after injection molding, the electrode sheet is tightly combined with the extrusion plate, has good insulation and is stable; the protruding part of the electrode sheet can be designed in a hemispherical shape to reduce the contact pressure with the film, avoid damaging the film, and ensure stable contact area.

[0009] In a further embodiment, a sleeve is arranged on the extrusion plate, and the sleeve is on the side of the extrusion plate in contact with the fixed plate; a sleeve rod is rotatably arranged on the fixed plate, and the sleeve rod is threadedly connected with the sleeve, and the end of the sleeve rod away from the extrusion plate penetrates through the fixed plate; a knob is stably arranged on the end of the sleeve rod away from the extrusion plate, and the knob is used to control the rotation of the sleeve rod, wherein the sleeve is made of copper, the inner wall is tapped, and is tightly threadedly connected with the sleeve rod, so that the sleeve can stably drive the extrusion plate to move when the sleeve rod is rotated; the knob is made of plastic, has anti-slip lines on the surface, facilitates manual operation, and its diameter is designed to meet ergonomics and facilitate force application; a rubber sealing ring is installed at the position where the sleeve rod penetrates through the fixed plate to prevent dust from entering the gap between the threads and affecting rotation.

[0010] In a further embodiment, a plurality of guide rods are arranged on the side of the extrusion plate close to the fixed plate for limiting the movement track of the extrusion plate, wherein the connection between the guide rod and the extrusion plate can adopt interference fit to insert the guide rod into the corresponding hole of the extrusion plate, and then the guide rod is fixed by spot welding on both sides of the extrusion plate to ensure the connection strength; the sliding fit between the guide rod and the fixed plate can embed a linear bearing in the guide rod mounting hole of the fixed plate to reduce the sliding friction of the guide rod and improve the movement accuracy of the extrusion plate.

[0011] In a further embodiment, the electrode sheet is provided with an auxiliary block, and the auxiliary block is located on the side of the electrode sheet close to the fixed plate, one end of the auxiliary block is connected with the electrode sheet, and the other end penetrates through and protrudes from the fixed plate, wherein the auxiliary block is penetrated through the fixed plate, a hole is drilled on the fixed plate, the hole diameter is slightly larger than the outer diameter of the auxiliary block, and a rubber ring is pasted on the hole wall, which can ensure the flexible penetration of the auxiliary block and also play a sealing and buffering role; the auxiliary block is laser welded with the electrode sheet, and the welding part is polished to ensure smooth connection.

[0012] In a further embodiment, the width of the extrusion plate is matched with the width of the placement groove, the length of the extrusion plate is matched with the distance between the sliding block and the fixed block after the sliding block slides to the end of the sliding groove away from the fixed block, and the thickness of the extrusion plate is smaller than the depth of the placement groove, wherein the size of the extrusion plate is matched with the size of the placement groove, numerical control processing technology is adopted to ensure accuracy, and the thickness of the extrusion plate is designed according to the compressibility of the measured film, and the best reserved space is determined through experimental test, which is generally about 0.8 times the depth of the placement groove.

[0013] In a further embodiment, flexible blocks are arranged on the fixed block and the positions corresponding to the fixed block on the placement plate, wherein the connection of the flexible blocks with the fixed block and the placement plate adopts glue sticking, and high-strength and aging-resistant rubber special glue such as neoprene glue is selected as the glue to ensure that the flexible blocks are stably attached for a long time without falling off to affect use.

[0014] Beneficial effects: 1. The cooperation of the structures of the placement plate, the fixed block, the flexible roller shaft and the sliding block; the placement plate provides stable support, and its placement groove is used for placing the measured film; the fixed block fixes one end of the measured film to ensure the stability of the starting end; the sliding block can slide freely in the placement groove, and the flexible roller shaft inside the sliding block is tightly attached to the film surface in the sliding process due to the softness of the silica gel material and the surface fine lines, and the measured film remains flat from clamping to the end.

[0015] 2. The cooperation of the extrusion plate, the sleeve, the sleeve rod and the knob realizes the purpose of keeping the measured film flat when the measured film contacts the electrode sheet, the measured film is installed flat in the placement groove, then the knob is rotated to make the knob move the extrusion plate to the measured film through the cooperation between the knob and the sleeve rod, until the electrode sheet contacts the measured film, and because the rubber pad is arranged on the surface of the extrusion plate and the rubber pad itself has a certain elasticity, it can fix other positions of the measured film when the electrode sheet contacts the measured film, so as to avoid the problem of protrusion when the measured film is arranged on the electrode sheet. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the present application or prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or prior art. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on these drawings.

[0017] Figure 1 The figure is a structural schematic diagram of the present application.

[0018] Figure 2 The figure is a structural schematic diagram of the placing plate.

[0019] Figure 3 The figure is a structural schematic diagram of the Figure 2 The figure is a sectional view structural schematic diagram of the

[0020] Figure 4 The figure is a structural schematic diagram of the sliding block.

[0021] Figure 5 The figure is a structural schematic diagram of the fixed plate.

[0022] Figure 6 The figure is a sectional view structural schematic diagram of the Figure 5 The figure is a sectional view structural schematic diagram of the

[0023] Figure 7 The figure is a structural schematic diagram of the extruding plate.

[0024] The figure is a structural schematic diagram of the present application. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions of the present application are described clearly and completely. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0026] The present application provides a kind of fast clamping four electrode film conductivity test fixture, solve the film to be measured because of soft texture, it is easy to bend and produce wrinkle in the clamping process using fixture, in turn affect the accuracy of test results, simultaneously because electrode piece is set to protruding, it will make the film to be measured after covering electrode piece, produce camber, to affect the actual effective test area of the film to be measured.The purpose of ensuring the film to be measured flat in the clamping process and making the film to be measured contact with electrode piece in flat state is realized in actual use.

[0027] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the drawings and specific embodiments of the specification.

[0028] Referring to Figures 1-7 A kind of fast clamping four-electrode membrane conductivity test fixture, comprising: placing plate 1;Placing groove 101, be opened in placing plate 1, the placing groove 101 is used to hold the film to be measured;Fixed block 6, detachably installed on placing plate 1, the fixed block 6 is used to fix the film to be measured one end on placing plate 1;Sliding block 7, detachably slidingly arranged in placing groove 101;Flexible roller 8, rotationally arranged in sliding block 7, the flexible roller 8 surface and the film surface in placing groove 101 contact, the flexible roller 8 is used to flatten the film to be measured in placing groove 101.

[0029] The opening of placing groove 101 makes that the film to be measured has special holding area, ensures that film has stable initial position in clamping process, avoids film to be randomly offset;The design of detachable installation of fixed block 6, it is convenient for operator to quickly fix the film to be measured one end on placing plate 1, effectively restricts one end of film, lays foundation for subsequent flattening operation;Sliding block 7 cooperates with flexible roller 8, when sliding block 7 slides in placing groove 101, flexible roller 8 can closely contact the film surface, and wrinkles, bending on film are flattened by relying on its flexibility, realize the preliminary flattening of film, so that film reaches ideal state before entering subsequent test link, improves test accuracy.

[0030] Sliding groove 102, be opened in the both sides of placing groove 101, the end of the sliding groove 102 close to fixed block 6 penetrates placing plate 1, and the penetration port is in the same plane with the opening of placing groove 101, the opening direction of the sliding groove 102 is same with the opening direction of placing groove 101, the sliding groove 102 is used for fixed block 6 sliding track limitation.

[0031] Sliding groove 102 is opened in both ends of placing groove 101 and penetrates placing plate 1, and its layout is same with placing groove 101, which provides accurate sliding track for fixed block 6;When operating fixed block 6, operator can quickly and accurately move fixed block 6 according to the path defined by sliding groove 102, ensure that the direction consistency and position accuracy of fixed block 6 are moved each time, further improve the standardization and efficiency of clamping operation, avoid that film is not clamped firmly or wrinkled due to the position deviation of fixed block 6, ensure that test process proceeds smoothly.

[0032] Fixed plate 2, rotationally arranged on one side of placing plate 1;Extrusion plate 3, slidingly arranged on fixed plate 2, and the extrusion plate 3 is arranged on the side of fixed plate 2 and placing plate 1 contact.

[0033] The fixed plate 2 is rotatably arranged on one side of the placing plate 1, and the rotatable connection mode provides flexible space conversion for subsequent operation of the extrusion plate 3; when it is needed to make the extrusion plate 3 contact the film to be tested in the placing groove 101, the fixed plate 2 can be conveniently turned over to make the extrusion plate 3 accurately in place, which changes the rigid mode of the traditional fixed structure, optimizes the operation process, and improves the overall maneuverability of the clamp.

[0034] The electrode sheet 4 is provided with four electrode sheets 4, which are equidistantly spaced, and the electrode sheet 4 is arranged in the extrusion plate 3, and the electrode sheet 4 protrudes from one side of the extrusion plate 3 away from the fixed plate 2.

[0035] The four equidistantly spaced electrode sheets 4 are arranged in the extrusion plate 3 and protrude from one side, which realizes multi-point and uniform electrical contact of the film to be tested; during the electrical conductivity test, the electrical information of different positions of the film can be comprehensively and accurately collected, compared with single-point or non-uniformly distributed electrodes, this design can effectively avoid the deviation of the test results caused by the limitation of the contact point, improve the comprehensiveness and reliability of the test data, and truly reflect the electrical conductivity of the film to be tested.

[0036] The sleeve 301 is arranged on the extrusion plate 3, and the sleeve 301 is located on the side of the extrusion plate 3 in contact with the fixed plate 2; the sleeve rod 5 is rotatably arranged on the fixed plate 2, and the sleeve rod 5 is threadedly connected with the sleeve 301, and one end of the sleeve rod 5 away from the extrusion plate 3 penetrates the fixed plate 2; the knob 501 is stably arranged on one end of the sleeve rod 5 away from the extrusion plate 3, and the knob 501 is used for controlling the rotation of the sleeve rod 5.

[0037] The threaded transmission structure composed of the sleeve 301, the sleeve rod 5 and the knob 501 realizes accurate control of the position of the extrusion plate 3. The operator rotates the knob 501, and the sleeve rod 5 rotates accordingly, and through the threaded connection with the sleeve 301, the extrusion plate 3 is smoothly pushed to move into the placing groove 101; this fine control mode ensures that the electrode sheet 4 contacts the film to be tested with uniform pressure and accurate position, avoids damage to the film or poor contact of the electrode sheet 4 caused by too fast or too violent movement of the extrusion plate 3, ensures stable and reliable test process, and improves test accuracy.

[0038] A plurality of guide rods are arranged on one side of the extrusion plate 3 close to the fixed plate 2, which is used for limiting the movement track of the extrusion plate 3.

[0039] The plurality of guide rods arranged on one side of the extrusion plate 3 close to the fixed plate 2 provide stable guidance for the sliding of the extrusion plate 3; during the movement of the extrusion plate 3, the guide rods limit it to straight line motion in the predetermined direction, prevent the extrusion plate 3 from deviating or shaking, and ensure that the electrode sheet 4 can always accurately align the corresponding position of the film to be tested, so that the contact state of the electrode sheet 4 and the film is consistent during each test, improve the test repeatability, and reduce the test fluctuation caused by the displacement error of the extrusion plate 3.

[0040] The electrode sheet 4 is provided with an auxiliary block, and the auxiliary block is located on the side of the electrode sheet 4 close to the fixed plate 2, one end of the auxiliary block is connected with the electrode sheet 4, and the other end penetrates and protrudes from the fixed plate 2.

[0041] The auxiliary block on the electrode sheet 4, one end of which is connected with the electrode sheet 4 and penetrates and protrudes from the fixed plate 2, plays a role of auxiliary fixing and positioning of the electrode sheet 4; on the one hand, it enhances the stability of the electrode sheet 4 in the extrusion plate 3, prevents the electrode sheet 4 from loosening and shifting in frequent use, and ensures that the electrode sheet 4 is always in the best working position during the test process; on the other hand, the part protruding from the fixed plate 2 is convenient for the operator to intuitively judge the position of the electrode sheet 4 from the outside, facilitates maintenance and debugging, and improves the overall ease of use of the clamp.

[0042] The width of the extrusion plate 3 is adapted to the width of the placement groove 101, the length of the extrusion plate 3 is adapted to the distance between the sliding block 7 and the fixed block 6 after the sliding block 7 slides to the end of the sliding groove 102 away from the fixed block 6, and the thickness of the extrusion plate 3 is less than the depth of the placement groove 101.

[0043] The adaptive design of the extrusion plate 3 and the placement groove 101 in width, length and thickness ensures that the extrusion plate 3 can perfectly fit into the corresponding space of the placement groove 101 when working; the width adaptation ensures that the extrusion plate 3 fully and accurately contacts the transverse of the film to be tested, avoiding gaps or uneven extrusion; the length adaptation makes the extrusion plate 3 cover the area of the film to be tested between the sliding block 7 and the fixed block 6 when moving to the limit position, realizing full contact; the thickness less than the depth of the placement groove 101 not only reserves space for the movement of the extrusion plate 3, but also prevents the extrusion plate 3 from protruding too much from the placement groove 101 to interfere with the film or other components.

[0044] The fixed block 6 and the corresponding position of the placement plate 1 are both provided with a flexible block.

[0045] The flexible blocks at the corresponding positions of the fixed block 6 and the placement plate 1 play a role of buffering and protection. When fixing the film to be tested, the flexible blocks can avoid scratching and damaging the film to be tested by rigid contact, prolonging the service life of the film; at the same time, during clamping, the flexible blocks can absorb part of the operating stress, reducing the probability of wrinkles or displacement of the film caused by factors such as vibration and collision.

[0046] In use, first, the film to be measured is cut to the size suitable for the placement groove 101, and the cut film to be measured is placed in the placement groove 101 on the placement plate 1, then the fixed block 6 detachably mounted on the placement plate 1 is used to firmly fix one end of the film to be measured, so that the film to be measured cannot move at will, then the sliding block 7 is accurately put into the sliding groove 102 opened in the placement groove 101, at this time, the surface of the flexible roller shaft 8 arranged in the sliding block 7 is in close contact with the surface of the film to be measured in the placement groove 101, the sliding block 7 is pushed to slide along the sliding groove 102, and the flexible roller shaft 8 gradually flattens the film to be measured by virtue of its flexibility; after the film to be measured is flattened, the fixed plate 2 arranged on one side of the placement plate 1 is rotated, so that the extrusion plate 3 slidingly arranged on the fixed plate 2 and located on the side of the fixed plate 2 in contact with the placement plate 1 is aligned with the placement groove 101, the four electrode pieces 4 equidistantly spaced and protruding from the side of the extrusion plate 3 away from the fixed plate 2 are arranged in the extrusion plate 3; at the same time, the sleeve 301 located on the side of the extrusion plate 3 in contact with the fixed plate 2 is in threaded connection with the sleeve rod 5 arranged on the fixed plate 2 and penetrating through one end of the fixed plate 2 and provided with a knob 501, the sleeve rod 5 is rotated by rotating the knob 501, and the extrusion plate 3 is stably moved into the placement groove 101 by threaded transmission, the plurality of guide rods arranged on the side of the extrusion plate 3 close to the fixed plate 2 ensure that the moving track of the extrusion plate 3 is accurate, so that the electrode pieces 4 can be in close and accurate contact with the flattened film to be measured, and thus the quick clamping of the film to be measured is completed, so that subsequent conductivity testing and other operations can be performed, wherein the fixed block 6 and the positions corresponding to the fixed block 6 on the placement plate 1 are both provided with flexible blocks, the electrode pieces 4 are provided with auxiliary blocks, one end of the auxiliary block is connected with the electrode piece 4, and the other end penetrates through and protrudes from the fixed plate 2, and they respectively play the roles of protection and auxiliary positioning.

[0047] The figures expressed in the drawings are example figures, and the purpose is only to more intuitively show the key structure and connection relationship of the quick clamping four-electrode film conductivity testing clamp of the utility model; in actual application, the appearance and size of the device can be adjusted and optimized according to specific needs.

[0048] The utility model covers any alternative, modification, equivalent method and scheme made on the essence and range of the utility model. In order to enable the public to have a thorough understanding of the utility model, the specific details are explained in the above preferred embodiments of the utility model, and the utility model can also be completely understood without the description of these details for the person skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the utility model, the well-known methods, processes, flows, elements and circuits are not explained in detail.

[0049] The above merely is preferred implementation manner of the present application, it should be pointed out, for ordinary skilled person in the technical field, on the premise of not departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the present application.

Claims

1. A fast-clamp four-electrode membrane conductivity test cell, characterized in that, include: Placement board (1); A placement slot (101) is provided on the placement plate (1), and the placement slot (101) is used to hold the membrane to be tested; A fixing block (6) is detachably installed on the placement plate (1). The fixing block (6) is used to fix one end of the membrane to be tested on the placement plate (1). The sliding block (7) is detachably and slidably disposed in the placement groove (101); A flexible roller (8) is rotatably disposed in a sliding block (7). The surface of the flexible roller (8) is in contact with the surface of the membrane to be tested in the placement groove (101). The flexible roller (8) is used to level the membrane to be tested in the placement groove (101).

2. The quick-clamp four-electrode membrane conductivity test fixture of claim 1, wherein, Also includes: A chute (102) is provided on both sides of the placement groove (101). The end of the chute (102) near the fixing block (6) passes through the placement plate (1), and the through opening is on the same side as the opening of the placement groove (101). The opening direction of the chute (102) is the same as the opening direction of the placement groove (101). The chute (102) is used to limit the sliding trajectory of the fixing block (6).

3. The quick-clamp four-electrode membrane conductivity test fixture of claim 1, wherein, Also includes: The fixed plate (2) is rotatably mounted on one side of the placement plate (1); The extrusion plate (3) is slidably disposed on the fixed plate (2), and the extrusion plate (3) is disposed on the side of the fixed plate (2) that contacts the placement plate (1).

4. The quick-clamp four-electrode membrane conductivity test fixture of claim 3, wherein, Also includes: There are four electrode plates (4), which are equidistant from each other. The electrode plates (4) are disposed inside the extrusion plate (3) and protrude from the side of the extrusion plate (3) away from the fixing plate (2).

5. The quick-clamp four-electrode membrane conductivity test fixture of claim 3, wherein, Also includes: A sleeve (301) is disposed on the extrusion plate (3), and the sleeve (301) is located on the side of the extrusion plate (3) that contacts the fixing plate (2); The sleeve rod (5) is rotatably mounted on the fixed plate (2), and the sleeve rod (5) is threadedly connected to the sleeve (301). The end of the sleeve rod (5) away from the extrusion plate (3) passes through the fixed plate (2). A knob (501) is stably set at one end of the sleeve (5) away from the extrusion plate (3), and the knob (501) is used to control the rotation of the sleeve (5).

6. The quick-clip four-electrode membrane conductivity test fixture of claim 3, wherein: The extrusion plate (3) has multiple guide rods on the side near the fixed plate (2) for limiting the movement trajectory of the extrusion plate (3).

7. The quick-clip four-electrode membrane conductivity test fixture of claim 4, wherein: An auxiliary block is provided on the electrode sheet (4), and the auxiliary block is located on the side of the electrode sheet (4) close to the fixing plate (2). One end of the auxiliary block is connected to the electrode sheet (4), and the other end passes through and protrudes from the fixing plate (2).

8. The quick-clip four-electrode membrane conductivity test fixture of claim 3, wherein: The width of the extrusion plate (3) is adapted to the width of the placement groove (101). The length of the extrusion plate (3) is adapted to the distance between the sliding block (7) and the fixed block (6) after the sliding block (7) slides to the end of the groove (102) away from the fixed block (6). The thickness of the extrusion plate (3) is less than the depth of the placement groove (101).

9. The quick-clip four-electrode membrane conductivity test fixture of claim 1, wherein: Flexible blocks are provided at positions corresponding to the fixed block (6) on both the fixed block (6) and the placement plate (1).

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