Diaphragm stretching air permeability testing system

Abstract

The utility model relates to the field of material testing, in particular to a diaphragm tensile air permeability testing system. Comprising a stretching pre-tightening device and an air permeability testing device, the stretching pre-tightening device comprises a fixed clamp, a movable clamp, a dynamometer and a transmission mechanism, the fixed clamp and the movable clamp are oppositely arranged, the air permeability testing device is located between the fixed clamp and the movable clamp, the measuring end of the dynamometer is connected with the fixed clamp through a sample, and the transmission mechanism is connected with a body of the dynamometer. According to the utility model, the diaphragm can be subjected to air permeability test in a stretching state, and the air permeability is accurately measured and evaluated.

Description

Technical Field

[0001] The utility model relates to the technical field of material testing, in particular to a diaphragm tensile air permeability testing system, which is used to evaluate the air permeability of a diaphragm in a tensile state, and is applicable to multiple industries such as batteries, chemistry, and textiles, providing important data support for material research and development and quality control. Background Art

[0002] As a key material for energy devices such as lithium batteries, the air permeability of the diaphragm directly affects the performance and lifespan of the battery. Traditional air permeability testing systems often ignore the tensile state of the diaphragm in actual use, resulting in a deviation between the test results and actual applications. Therefore, it is of great significance to develop a system that can accurately test the air permeability of the stretched diaphragm. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a diaphragm tensile air permeability testing system, which can conduct an air permeability test on the diaphragm in a tensile state and accurately measure and evaluate its air permeability.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a diaphragm tensile air permeability testing system, including a tensile pre-tightening device and an air permeability testing device. The tensile pre-tightening device includes a fixed clamp, a movable clamp, a dynamometer, and a transmission mechanism. The fixed clamp and the movable clamp are arranged oppositely, the air permeability testing device is located between the fixed clamp and the movable clamp, the measuring end of the dynamometer is connected to the movable clamp, and the transmission mechanism is connected to the body of the dynamometer.

[0005] Further, both the movable clamp and the fixed clamp include a bottom plate and side plates vertically arranged at both ends of the bottom plate. U-shaped grooves are opened at the same positions of the side plates, clamping bodies are arranged on the U-shaped grooves, and fixture grooves are opened on the clamping bodies.

[0006] Further, the clamping body is cylindrical, and the fixture groove is arranged along the axis of the clamping body.

[0007] Further, both ends of the clamping body are cut into planes matching the U-shaped grooves.

[0008] Further, the fixed clamp is fixed on one side of the air permeability testing device through an L-shaped bracket.

[0009] Further, the transmission mechanism includes a lead screw, a smooth shaft, a slider, a fixed bracket, and a mounting seat. The lead screw and the smooth shaft are arranged in parallel between the fixed bracket and the mounting seat. Both ends of the slider pass through the lead screw and the smooth shaft respectively. The slider is in threaded cooperation with the lead screw and in clearance fit with the smooth shaft. A dynamometer mounting plate is arranged on the slider, and the dynamometer is mounted on the dynamometer mounting plate. The lead screw is connected to a power device.

[0010] Further, the power device is a handwheel or a motor.

[0011] Further, the mounting seat is fixed on the side of the air permeability testing device opposite to the fixed fixture.

[0012] Advantages of the present utility model: The present utility model includes a fixed fixture, a moving fixture, a dynamometer, and a transmission mechanism. When in use, the specimen is fixed on the strip-shaped groove of the fixture body, and the power device is rotated to drive the lead screw to rotate, driving the dynamometer to move to the right, thereby clamping the specimen. And the accurate pre-tightening force value can be obtained through the dynamometer, and the pre-tightening force provided to the specimen can be accurately controlled, and the air permeability of the diaphragm in the stretched state can be tested. Compared with the existing method, the accuracy and efficiency are greatly improved. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a front view structural diagram of the present utility model;

[0015] Figure 3 is a top view structural diagram of the present utility model;

[0016] Figure 4 is a structural diagram of the moving fixture / fixed fixture;

[0017] Figure 5 is a top view structural diagram of the moving fixture / fixed fixture;

[0018] In the figure: 1, fixed fixture; 2, air permeability testing device; 3, moving fixture; 4, dynamometer; 5, optical axis; 6, handwheel; 7, fixed bracket; 8, lead screw; 9, dynamometer mounting plate; 10, slider; 11, mounting seat; 12, L-shaped bracket; 13, bottom plate; 14, side plate; 15, fixture body; 16, U-shaped groove; 17, fixture groove. Detailed Embodiments

[0019] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0020] Embodiment 1

[0021] This embodiment discloses a diaphragm stretching air permeability testing system, as Figure 1 , 2, as shown in FIGS. 3, it includes a stretching pre-tightening device and a gas permeability testing device 2. The stretching pre-tightening device includes a fixed clamp 1, a moving clamp 3, a dynamometer 4 and a transmission mechanism. The fixed clamp 1 and the moving clamp 3 are arranged oppositely. The fixed clamp 1 is used to clamp one end of the diaphragm, and the moving clamp 3 is used to clamp the other end of the diaphragm. The gas permeability testing device 2 is located between the fixed clamp 1 and the moving clamp 3. The measuring end of the dynamometer 4 is connected to the moving clamp 3, and the transmission mechanism is connected to the body of the dynamometer 4. The stretching pre-tightening device is used to fix and stretch the diaphragm to be tested to a predetermined pre-tightening force, and the gas permeability testing device is used to test the gas permeability of the diaphragm in the stretched state.

[0022] As Figure 4 , 5 shown, both the moving clamp 3 and the fixed clamp 2 include a bottom plate 13 and side plates 14 vertically provided at both ends of the bottom plate 13. U-shaped grooves 16 are formed at the same positions of the side plates 14. A clamping body 15 is provided on the U-shaped groove 16, and a clamping fixture groove 17 is formed on the clamping body 15. In this embodiment, the clamping body 15 is cylindrical, and the clamping fixture groove 17 is arranged along the axis of the clamping body 15. The end of the diaphragm is inserted into the clamping fixture groove 17 and wound around the clamping body 15 for one week to fix the diaphragm on the moving clamp 3 or the moving clamp 1. Both ends of the clamping body 15 are cut into planes matching the U-shaped groove to prevent the clamping body 15 from sliding in the U-shaped groove 16.

[0023] As Figure 1 shown, the transmission mechanism includes a lead screw 8, an optical axis 5, a slider 10, a fixed bracket 7 and a mounting seat 11. The lead screw 8 and the optical axis 5 are arranged in parallel between the fixed bracket 7 and the mounting seat 11. Both ends of the slider 10 pass through the lead screw 8 and the optical axis 5 respectively. The slider 10 is in threaded cooperation with the lead screw 8 and in clearance fit with the optical axis 5. A dynamometer mounting plate 9 is provided on the slider 10, and the dynamometer 4 is mounted on the dynamometer mounting plate 9. The lead screw 8 is connected to a power device. The fixed clamp 1 is fixed on one side of the gas permeability testing device 2 through an L-shaped bracket 12.

[0024] The transmission mechanism is fixed on the side of the gas permeability testing device 2 opposite to the fixed clamp 1 through the mounting seat 11.

[0025] In this embodiment, the power device is a handwheel 6 or a motor. In this embodiment, the handwheel 6 is used as the power device, and the handwheel 6 is connected to the lead screw 8 through the fixed bracket 7. When using a motor as the power device, the output shaft of the motor is connected to the lead screw 8.

[0026] The transmission mechanism can also adopt other structures, such as a rack and pinion, as long as it can drive the dynamometer and the moving clamp to move.

[0027] The working process of the present utility model is as follows:

[0028] 1. Fix one end of the diaphragm to be tested on the fixed clamp 1 and the other end on the moving clamp 3.

[0029] 2. Rotate the handwheel 6 to drive the lead screw 8 to rotate. Under the action of the lead screw 8, the slider 10 drives the moving fixture 3 away from the fixed fixture 1, thereby stretching the diaphragm. Monitor the tensile force through the dynamometer 4 to make the diaphragm reach the predetermined pre-tightening force.

[0030] 3. Perform a gas permeability test on the stretched diaphragm.

[0031] The utility model can clamp the specimen and obtain an accurate pre-tightening force value through the dynamometer, so as to accurately control the pre-tightening force provided to the diaphragm and test the gas permeability of the diaphragm in the stretched state. Compared with the existing manual control method of pre-tightening force, the accuracy and efficiency are greatly improved.

[0032] The above description only presents the basic principle and preferred embodiments of the utility model. The improvements and substitutions made by those skilled in the art based on the utility model fall within the protection scope of the utility model.

Claims

1. A membrane tensile air permeability testing system, characterized by: It includes a stretching preload device and an air permeability testing device. The stretching preload device includes a fixed clamp, a movable clamp, a dynamometer and a transmission mechanism. The fixed clamp and the movable clamp are arranged opposite to each other. The air permeability testing device is located between the fixed clamp and the movable clamp. The measuring end of the dynamometer is connected to the movable clamp, and the transmission mechanism is connected to the body of the dynamometer.

2. The membrane tensile air permeability testing system according to claim 1, characterized in that: The movable clamp and the fixed clamp both comprise a bottom plate and side plates vertically arranged at both ends of the bottom plate, the side plates are provided with U-shaped grooves at the same positions, a clamp body is arranged on the U-shaped groove, and a clamp groove is arranged on the clamp body.

3. The membrane tensile air permeability testing system according to claim 2, characterized in that: The clamp body is cylindrical, and the clamp groove is arranged along the axis of the clamp body.

4. The membrane tensile air permeability testing system according to claim 2, characterized in that: Both ends of the clamp body are cut into flat surfaces that match the U-shaped groove.

5. The membrane tensile air permeability testing system according to claim 3, characterized in that: The fixed fixture is fixed to one side of the air permeability testing device through an L-shaped bracket.

6. The membrane tensile air permeability testing system according to claim 1, characterized in that: The transmission mechanism includes a lead screw, an optical axis, a slider, a fixed bracket and a mounting seat. The lead screw and the optical axis are arranged in parallel between the fixed bracket and the mounting seat. The two ends of the slider pass through the lead screw and the optical axis respectively. The slider and the lead screw are threaded together, and the slider and the optical axis are clearance-matched. A dynamometer mounting plate is provided on the slider, and the dynamometer is installed on the dynamometer mounting plate. The lead screw is connected to a power device.

7. The membrane tensile air permeability testing system according to claim 6, characterized in that: The power device is a hand wheel or a motor.

8. The membrane tensile air permeability testing system according to claim 6, characterized in that: The mounting seat is fixed on the side of the air permeability testing device opposite to the fixed fixture.

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