Diaphragm test sampling device

Abstract

The utility model relates to the technical field of battery experiment equipment, and provides a diaphragm test sampling device which comprises a device frame body, a diaphragm positioning table, a diaphragm limiting part, a driving assembly and a diaphragm cutter assembly, the diaphragm can be conveniently and tightly pressed at the top of the diaphragm positioning table through the diaphragm limiting component, so that the problem of diaphragm deviation in the diaphragm cutting process is avoided, and the diaphragm sampling accuracy is improved; the diaphragm cutter assembly is driven by the driving assembly to perform reciprocating diaphragm cutting action, a manual knocking mode is not needed, the safety is greatly improved, meanwhile, the risk that the edge of the diaphragm is slightly damaged due to manual knocking is reduced, continuous sampling operation can be performed, the sample preparation efficiency is greatly improved, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery experimental equipment, in particular to a diaphragm test sampling device. Background Art

[0002] Lithium-ion batteries are widely used because of their advantages such as high voltage, high capacity, long cycle life, and no memory effect. For lithium-ion batteries, the main function of the separator is to separate the positive and negative electrodes to prevent them from contacting and forming a short circuit, while allowing lithium ions to pass smoothly. Therefore, the characteristics of the separator and related processing technology have a great influence on the performance of lithium-ion batteries.

[0003] The diaphragm can provide an additional function of thermal shutdown, providing additional safety protection for lithium batteries. The main parameters of this additional function are the closed-pore temperature and the membrane rupture temperature. Lower closed-pore temperature and higher membrane rupture temperature can improve the safety performance of the battery to a greater extent. The current method for evaluating the closed-pore temperature and membrane rupture temperature of the diaphragm is to sample the diaphragm in the horizontal and vertical directions respectively, use the matching tooling to make a 10mm spline and place it in a thermomechanical analyzer, heat the diaphragm, and deform the diaphragm under a constant small load, and measure the relationship curve between the diaphragm temperature and deformation.

[0004] During the test sample preparation process, sampling tools are required to cut the horizontal and vertical diaphragms respectively. At present, sampling tools require the human eye to estimate the direction when sampling, which is prone to deviation during the sampling process. Sampling is often required to be repeated many times, resulting in a waste of labor costs. In addition, if the sampling is not parallel to the horizontal and vertical directions of the diaphragm, it will affect the accuracy of the test results. In addition, during the sampling process, it is necessary to manually knock the upper end of the sampler vigorously, or use a hammer to knock, which is time-consuming and labor-intensive, increases labor costs and poses safety hazards. It may also cause slight damage to the edge of the sample and affect the test results, which has a great impact on the efficiency and accuracy of the diaphragm closed cell temperature and membrane rupture temperature test. Utility Model Content

[0005] The utility model provides a diaphragm test sampling device, which is used to solve the problems in the prior art that manual sampling is time-consuming and labor-intensive, and repeated sampling is difficult.

[0006] In one aspect, the utility model provides a diaphragm test sampling device, comprising:

[0007] The device frame has a sampling area at the bottom;

[0008] A diaphragm positioning platform is arranged in the sampling area of ​​the device frame; a cavity is arranged inside the diaphragm positioning platform, and a diaphragm cutting hole communicating with the cavity is arranged on the top plane;

[0009] A diaphragm limiting component is connected to one side of the diaphragm positioning platform, and its limiting end can press the diaphragm against the top end surface of the diaphragm positioning platform;

[0010] A driving assembly, disposed on the top of the device frame, with its action end penetrating into the sampling area;

[0011] The diaphragm knife assembly is connected to the action end of the driving assembly and is opposite to the diaphragm positioning platform; the driving assembly can drive the diaphragm knife assembly to reciprocate so that the blade end of the diaphragm knife assembly forms a cutting fit with the diaphragm cutting hole.

[0012] In a preferred embodiment of the diaphragm testing sampling device provided by the utility model, a diaphragm drawer is provided on one side of the diaphragm positioning platform, and an opening of the diaphragm drawer corresponds to the diaphragm cutting hole.

[0013] In the preferred embodiment of the diaphragm test sampling device provided by the utility model, the device frame comprises: a bottom mounting plate, a middle partition plate and a top mounting plate; the bottom mounting plate, the middle partition plate and the top mounting plate are arranged in parallel and connected by a connecting rod; a sampling area is formed between the middle partition plate and the bottom mounting plate;

[0014] The diaphragm positioning platform is installed above the bottom mounting plate; the driving assembly is arranged at the bottom of the top mounting plate.

[0015] In the preferred embodiment of the diaphragm testing sampling device provided by the utility model, the driving assembly comprises:

[0016] A linear drive component 1 is horizontally arranged at the bottom of the top mounting plate; a strip-shaped sliding hole is opened on the middle partition plate in line with the motion trajectory of the linear drive component 1;

[0017] The linear drive component 2 is vertically arranged at the action end of the linear drive component 1, and its telescopic end passes through the strip-shaped sliding hole and is located in the sampling area; the diaphragm knife assembly is arranged at the telescopic end of the linear drive component 2.

[0018] In a preferred embodiment of the diaphragm testing sampling device provided by the utility model, a plurality of diaphragm cutting holes are provided on the top end surface of the diaphragm positioning platform; the plurality of diaphragm cutting holes are divided into a plurality of groups of transverse diaphragm holes and longitudinal diaphragm holes; each group of transverse diaphragm holes and longitudinal diaphragm holes are arranged in a T shape.

[0019] In a preferred embodiment of the diaphragm testing sampling device provided by the utility model, the diaphragm knife assembly is provided with a pressure sensor and a laser aligner.

[0020] In the preferred embodiment of the diaphragm testing sampling device provided by the utility model, the diaphragm knife assembly comprises:

[0021] A knife seat component, the knife seat component is connected to the telescopic end of the second linear drive component, and a knife installation groove adapted to the transverse diaphragm hole and the longitudinal diaphragm hole is provided at the bottom thereof;

[0022] The transverse cutter head and the longitudinal cutter head are respectively connected to the cutter mounting grooves.

[0023] In a preferred embodiment of the diaphragm testing sampling device provided by the utility model, a magnetic attraction component is provided in the tool mounting groove, and the diaphragm tool head is connected to the magnetic attraction component.

[0024] In a preferred embodiment of the diaphragm testing sampling device provided by the utility model, the diaphragm drawer is provided with a transverse diaphragm storage area and a longitudinal diaphragm storage area.

[0025] In the preferred embodiment of the diaphragm testing sampling device provided by the utility model, the diaphragm limiting component includes:

[0026] Positioning bolts; a fixed boss is arranged on one side edge of the diaphragm positioning platform, and limiting convex strips are arranged on the other edges, and the positioning bolts are arranged at both ends of the fixed boss;

[0027] A positioning pressure plate, one end of which is connected to the top of the positioning bolt; and the other end forms an extrusion structure with the top edge of the diaphragm positioning platform.

[0028] The utility model provides a diaphragm testing sampling device, which can conveniently press the diaphragm on the top of the diaphragm positioning platform through the diaphragm limiting component, avoid the problem of diaphragm deviation in the process of cutting the diaphragm, and improve the accuracy of diaphragm sampling; and drive the diaphragm knife component to cut the diaphragm through the driving component, and no longer need to use manual knocking method, so the safety is greatly improved, and at the same time, the risk of slight damage to the edge of the diaphragm due to manual knocking is reduced, and continuous sampling operations can be performed, which greatly improves the sample preparation efficiency and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a front view of the diaphragm test sampling device provided by an embodiment of the utility model;

[0031] Figure 2 It is a side view of the diaphragm test sampling device provided by an embodiment of the utility model;

[0032] Figure 3 It is a schematic diagram of the top table of the diaphragm positioning table provided in an embodiment of the utility model;

[0033] Figure 4 It is a top view of the diaphragm drawer provided by the embodiment of the utility model;

[0034] Figure 5 It is a rear view of the diaphragm drawer provided in the embodiment of the utility model.

[0035] Reference numerals:

[0036] 1. Device frame; 10. Bottom mounting plate; 11. Middle partition; 110. Strip sliding hole; 12. Top mounting plate; 2. Diaphragm positioning platform; 20. Diaphragm cutting hole; 200. Horizontal diaphragm hole; 201. Longitudinal diaphragm hole; 21. Diaphragm drawer; 210. Horizontal diaphragm storage area; 211. Longitudinal diaphragm storage area; 22. Fixed boss; 23. Limiting convex strip; 3. Diaphragm limiting component; 30. Positioning bolt; 31. Positioning pressure plate; 4. Drive assembly; 40. Linear drive component one; 41. Linear drive component two; 5. Diaphragm knife assembly; 50. Knife seat component; 51. Horizontal knife head; 52. Longitudinal knife head. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Combine the following Figure 1-Figure 5 The utility model describes a diaphragm testing sampling device.

[0039] like Figure 1-2 As shown, the diaphragm test sampling device provided by the embodiment of the utility model comprises: a device frame 1, a diaphragm positioning platform 2, a diaphragm limiting component 3, a driving component 4 and a diaphragm knife component 5; wherein,

[0040] A sampling area is provided at the bottom of the device frame 1; a diaphragm positioning platform 2 is provided in the sampling area of ​​the device frame 1; a cavity is provided inside the diaphragm positioning platform 2, and a diaphragm cutting hole 20 connected to the cavity is provided on the top plane; a diaphragm limiting component 3 is connected to one side of the diaphragm positioning platform 2, and its limiting end can press the diaphragm against the top end surface of the diaphragm positioning platform 2; a driving component 4 is provided at the top of the device frame 1, and its action end penetrates into the sampling area; a diaphragm knife component 5 is connected to the action end of the driving component 4, opposite to the diaphragm positioning platform 2; the driving component 4 can drive the diaphragm knife component 5 to reciprocate, so that the blade end of the diaphragm knife component 5 forms a cutting fit with the diaphragm cutting hole 20.

[0041] The utility model provides a diaphragm testing sampling device, which can conveniently press the diaphragm on the top of the diaphragm positioning platform 2 through the diaphragm limiting component 3, avoid the problem of diaphragm deviation in the process of cutting the diaphragm, and improve the accuracy of diaphragm sampling; and drive the diaphragm knife component 5 to cut the diaphragm through the driving component 4, without the need for manual knocking, the safety is greatly improved, and at the same time the risk of slight damage to the edge of the diaphragm caused by manual knocking is reduced, and continuous sampling operations can be performed, which greatly improves the sample preparation efficiency and reduces labor costs.

[0042] like Figure 1-2 , Figure 4-5 As shown, in the specific embodiment of the diaphragm testing sampling device provided by the utility model, a diaphragm drawer 21 is provided on one side of the diaphragm positioning platform 2, and the opening of the diaphragm drawer 21 corresponds to the diaphragm cutting hole 20. When the diaphragm sample is cut, it will fall into the diaphragm drawer 21 along the diaphragm cutting hole 20, and then the diaphragm sample is collected regularly, which is very convenient.

[0043] like Figure 1-2 As shown, in a specific embodiment of the diaphragm testing sampling device provided by the utility model, the device frame 1 includes: a bottom mounting plate 10, a middle partition plate 11 and a top mounting plate 12; the bottom mounting plate 10, the middle partition plate 11 and the top mounting plate 12 are arranged in parallel and connected by a connecting rod; a sampling area is formed between the middle partition plate 11 and the bottom mounting plate 110; the diaphragm positioning platform 2 is installed above the bottom mounting plate 10; and the drive assembly 4 is arranged at the bottom of the top mounting plate 12.

[0044] In the above solution, by isolating the installation area from the sampling area, the working area can be isolated to avoid interference.

[0045] like Figure 1-2 As shown, in the specific embodiment of the diaphragm test sampling device provided by the utility model, the drive assembly 4 includes: a linear drive component 1 40 and a linear drive component 2 41; wherein,

[0046] The linear driving component 1 40 is horizontally arranged at the bottom of the top mounting plate 12; a strip-shaped sliding hole consistent with the movement trajectory of the linear driving component 1 40 is opened on the middle partition 11; the linear driving component 2 41 is vertically arranged at the action end of the linear driving component 1 40, and its telescopic end passes through the strip-shaped sliding hole and is located in the sampling area; the diaphragm knife assembly 5 is arranged at the telescopic end of the linear driving component 2 41.

[0047] It should be noted that the linear drive component 40 is a prior art and can be preferably an electric guide rail; the linear drive component 40 is a prior art and can be an electric telescopic rod, an oil cylinder, an air cylinder, etc., and is preferably a cylinder device here.

[0048] In the above scheme, the linear driving component 1 40 can drive the linear driving component 2 41 to move horizontally, so that the diaphragm knife assembly 5 is respectively aligned with different diaphragm cutting holes 20. Combined with the longitudinal reciprocating motion of the linear driving component 2 41, multiple sampling of the diaphragm can be achieved in coordination with different diaphragm cutting holes 20. There is no need for manual knocking, and the risk of minor damage to the edge of the diaphragm caused by manual knocking is reduced. The sampling efficiency is higher and the safety is higher.

[0049] like Figure 3 As shown, in a specific embodiment of the diaphragm testing sampling device provided by the utility model, a plurality of diaphragm cutting holes 20 are provided on the top end surface of the diaphragm positioning platform 2; the plurality of diaphragm cutting holes 20 are divided into a plurality of groups of transverse diaphragm holes 200 and longitudinal diaphragm holes 201; each group of transverse diaphragm holes 200 and longitudinal diaphragm holes 201 are arranged in a T shape.

[0050] Specifically, a plurality of transverse diaphragm holes 200 and longitudinal diaphragm holes 201 are arranged side by side in a T-shape. When the linear drive component 40 moves, it can drive the linear drive component 41 and the diaphragm knife assembly 5 to move in turn with the transverse diaphragm holes 200 and the longitudinal diaphragm holes 201 at corresponding positions. Each cutting action can simultaneously cut a group of transverse diaphragm samples and longitudinal diaphragm samples.

[0051] like Figure 4-5 As shown, the membrane drawer 21 is provided with a transverse membrane storage area 210 and a longitudinal membrane storage area 211 , which can store the transverse membrane samples and the longitudinal membrane samples dropped from the transverse membrane hole 200 and the longitudinal membrane hole 201 , respectively.

[0052] In the above scheme, by preparing the same number of transverse diaphragm samples and longitudinal diaphragm samples at the same time, not only the processing efficiency of the samples can be improved, but also the transverse and longitudinal samples can be conveniently distinguished through the diaphragm drawer 21, thereby avoiding confusion of samples and helping to improve production efficiency.

[0053] In a specific embodiment of the diaphragm testing sampling device provided by the utility model, the diaphragm knife assembly 5 is provided with a pressure sensor and a laser aligner.

[0054] It should be noted that the pressure sensor and the laser aligner are both existing technologies. The pressure sensor is arranged at the bottom of the tool holder component 50. When the tool head cuts into the corresponding diaphragm hole, it touches the pressure sensor, and the linear drive component 2 41 drives the diaphragm tool head to reset, completing the cutting in sequence; the laser aligner is used to locate the position of the diaphragm tool head to ensure that the diaphragm tool head corresponds to the diaphragm hole.

[0055] In the above scheme, the automatic control effect can be improved by setting up pressure sensors and laser aligners. The sampling pressure can be set by itself, which ensures the stability and controllability of the sampling pressure, improves the consistency of sampling, ensures the accuracy of the sampling action, and improves the pass rate.

[0056] like Figure 1-2 As shown, in the specific embodiment of the diaphragm testing sampling device provided by the utility model, the diaphragm knife assembly 5 includes: a knife seat component 50, a transverse knife head 51 and a longitudinal knife head 52; wherein,

[0057] The tool holder component 50 is connected to the telescopic end of the linear drive component 2 41, and a tool mounting groove adapted to the transverse diaphragm hole 200 and the longitudinal diaphragm hole 201 is provided at its bottom; the transverse tool head 51 and the longitudinal tool head 52 are respectively connected to the tool mounting groove.

[0058] In the above solution, the cutter head can be replaced by the detachable connection between the cutter seat component 50 and the cutter head, which is helpful to reduce maintenance costs.

[0059] In a specific embodiment of the diaphragm testing sampling device provided by the utility model, a magnetic attraction component is provided in the tool installation groove, and the transverse tool head 51 and the longitudinal tool head 52 are magnetically connected to the magnetic attraction component.

[0060] Specifically, the magnetic attraction component is a prior art, and can be a permanent magnet or an electromagnet, etc., preferably a permanent magnet, which is embedded in the bottom of the tool mounting groove to achieve a detachable connection of the diaphragm tool head.

[0061] In the above scheme, the detachable connection between the diaphragm cutter head and the cutter seat component 50 is achieved by magnetic attraction. When the cutter head is replaced, the diaphragm cutter head can be quickly installed and replaced by plugging and unplugging, which is beneficial to improving maintenance efficiency and thus improving work efficiency.

[0062] In the specific embodiment of the diaphragm testing sampling device provided by the utility model, the diaphragm limiting component 3 includes: a positioning bolt 30 and a positioning pressure plate 31; wherein,

[0063] A fixing boss 22 is provided on one side edge of the diaphragm positioning platform 2, and a limiting convex strip 23 is provided on the other edge. Positioning bolts 30 are provided at both ends of the fixing boss 22; one end of the positioning pressure plate 31 is connected to the top of the positioning bolt 30; and the other end forms an extrusion structure with the top edge of the diaphragm positioning platform 2.

[0064] Specifically, two threaded holes are provided at both ends of the top of the fixed boss 22, and one end of the two positioning bolts 30 is screwed into the threaded holes. The positioning pressure plate 31 is a Z-shaped structure, and its top cross plate is rotatably connected to the top of the positioning bolts 30, and the bottom cross plate is pressed on the top of the diaphragm positioning platform 2 and is on the inner edge of the limiting convex strip 23.

[0065] Specifically, the positioning pressing plate 31 is an elastic pressing plate.

[0066] In the above scheme, the diaphragm is placed on the diaphragm positioning platform 2, and the inner walls of the fixed boss 22 and the limiting convex strip 23 form a diaphragm limiting groove. By placing the diaphragm therein, the diaphragm can be quickly aligned, which is beneficial to improving work efficiency; and the positioning pressure plate 31 can further improve the stability of the diaphragm, avoiding the problem of diaphragm movement during cutting operations, which is beneficial to improving the quality of the diaphragm sample and improving the utilization rate of the diaphragm.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A diaphragm test sampling device, It is characterized in that include: The device frame has a sampling area at the bottom; A diaphragm positioning platform is arranged in the sampling area of ​​the device frame; a cavity is arranged inside the diaphragm positioning platform, and a diaphragm cutting hole communicating with the cavity is arranged on the top plane; A diaphragm limiting component is connected to one side of the diaphragm positioning platform, and its limiting end can press the diaphragm against the top end surface of the diaphragm positioning platform; A driving assembly, disposed on the top of the device frame, with its action end penetrating into the sampling area; The diaphragm knife assembly is connected to the action end of the driving assembly and is opposite to the diaphragm positioning platform; the driving assembly can drive the diaphragm knife assembly to reciprocate so that the blade end of the diaphragm knife assembly forms a cutting fit with the diaphragm cutting hole.

2. The diaphragm test sampling device according to claim 1, It is characterized in that A diaphragm drawer is arranged on one side of the diaphragm positioning platform, and an opening of the diaphragm drawer corresponds to the diaphragm cutting hole.

3. The diaphragm testing sampling device according to claim 1, It is characterized in that The device frame comprises: a bottom mounting plate, a middle partition plate and a top mounting plate; the bottom mounting plate, the middle partition plate and the top mounting plate are arranged in parallel and connected by a connecting rod; a sampling area is formed between the middle partition plate and the bottom mounting plate; The diaphragm positioning platform is installed above the bottom mounting plate; the driving assembly is arranged at the bottom of the top mounting plate.

4. The diaphragm testing sampling device according to claim 3, It is characterized in that The drive assembly comprises: A linear drive component 1 is horizontally arranged at the bottom of the top mounting plate; a strip-shaped sliding hole is opened on the middle partition plate in line with the motion trajectory of the linear drive component 1; The linear drive component 2 is vertically arranged at the action end of the linear drive component 1, and its telescopic end passes through the strip-shaped sliding hole and is located in the sampling area; the diaphragm knife assembly is arranged at the telescopic end of the linear drive component 2.

5. The diaphragm testing sampling device according to claim 4, It is characterized in that The top end surface of the diaphragm positioning platform is provided with a plurality of diaphragm cutting holes; the plurality of diaphragm cutting holes are divided into a plurality of groups of transverse diaphragm holes and longitudinal diaphragm holes; each group of transverse diaphragm holes and longitudinal diaphragm holes is arranged in a T shape.

6. The diaphragm testing sampling device according to claim 5, It is characterized in that The diaphragm knife assembly is provided with a pressure sensor and a laser aligner.

7. The diaphragm testing sampling device according to claim 5, It is characterized in that The diaphragm knife assembly comprises: A knife seat component, the knife seat component is connected to the telescopic end of the second linear drive component, and a knife installation groove adapted to the transverse diaphragm hole and the longitudinal diaphragm hole is provided at the bottom thereof; The transverse cutter head and the longitudinal cutter head are respectively connected to the cutter mounting grooves.

8. The diaphragm testing sampling device according to claim 7, It is characterized in that A magnetic attraction component is arranged in the tool installation groove, and the diaphragm tool head is connected to the magnetic attraction component.

9. The diaphragm testing sampling device according to claim 7, It is characterized in that The membrane drawer is provided with a transverse membrane storage area and a longitudinal membrane storage area.

10. The diaphragm testing sampling device according to any one of claims 1 to 4, It is characterized in that The diaphragm limiting component comprises: Positioning bolts; a fixed boss is arranged on one side edge of the diaphragm positioning platform, and limiting convex strips are arranged on the other edges, and the positioning bolts are arranged at both ends of the fixed boss; A positioning pressure plate, one end of which is connected to the top of the positioning bolt; and the other end forms an extrusion structure with the top edge of the diaphragm positioning platform.

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