A replaceable air permeability tester cavity

Abstract

The utility model relates to material air permeability test technical field, concretely relates to a replaceable air permeability tester test cavity. Including upper test head, lower test head, fixed base, realize the quick release mechanism of fixed base and upper test head detachable connection, quick release mechanism includes baffle and flange, baffle has multiple groups, and each group contains 2 or more than 2 baffle along the circumferential direction interval setting of fixed base, the same number of flanges in each group baffle and along the circumferential direction interval setting of upper test head top, flange and baffle joint, upper test head relative fixed base circumferential direction rotation setting. The utility model discloses through quick release mechanism can conveniently replace upper test head, can adapt to different test area, different test shape and different test mode sample, improve the application scope of single air permeability tester, convenient and reliable and have repeatability.

Description

Technical Field

[0001] This utility model relates to the field of material air permeability testing technology, specifically to a replaceable air permeability meter test chamber. Background Technology

[0002] Air permeability is an important indicator for evaluating the physical properties of porous materials such as battery separators, exchange membranes, carbon paper, carbon plates, and graphite. Currently, commercially available air permeability meters have fixed-area test chambers that are permanently connected and cannot be disassembled or replaced. According to standards, their test area is typically 1 square inch (1in²). This fixed test chamber design has technical defects and limitations in practical applications: First, it cannot adapt to samples of different sizes.

[0003] In the market, the test chamber of air permeability meters is fixedly connected to the main body and cannot be replaced; its test area is set before leaving the factory and cannot be changed. However, with the diversification of application requirements, users often need to test samples with non-standard areas according to specific product standards or R&D needs. Since the test chamber of air permeability meters on the market cannot be replaced, users can only choose to add a test device for non-standard samples to solve such non-standard testing tasks.

[0004] Second, adding testing equipment will cause various problems such as increased purchase costs and increased failure rate.

[0005] To address the testing challenges of samples of varying sizes, air permeability meters on the market have expanded their functionality through external testing devices. However, this approach has significant drawbacks: First, these devices are typically expensive, requiring users to pay higher purchase costs for sample testing. Even so, this doesn't fundamentally solve the user's problem, as the device's area remains fixed. If samples of different sizes are added, a custom-made device is necessary, requiring additional purchase and placing a considerable financial burden on the user. Second, adding testing devices increases the complexity of the instrument system, making operation cumbersome. It necessitates pipe connections, airtightness checks, and even system recalibration; otherwise, test results may be incorrect. The entire process is time-consuming and labor-intensive, demanding a high level of operator expertise and hindering rapid switching.

[0006] Third, it cannot meet the testing requirements for curved surface specimens.

[0007] Existing test chambers all employ planar sealing, with structures specifically designed for flat sheet membranes. However, with the increasingly widespread application of membrane materials, many samples are curved. When using planar test chambers to clamp and seal curved samples, the sealing rings at the chamber edges cannot fully conform to the curved contour, leading to gas leakage during testing. This leakage directly results in erroneous measurement data, making it impossible to effectively assess the permeability of curved samples. Utility Model Content

[0008] In summary, existing air permeability meters have significant shortcomings. Therefore, there is an urgent need for an innovative solution that enables quick and easy replacement of the test chamber, overcoming the limitation of existing technologies where the same air permeability meter cannot test samples with different test areas and shapes. This solution would not only adapt to the testing needs of diverse samples but also help control equipment costs and improve operational flexibility.

[0009] To solve the aforementioned technical problem, the present invention adopts the following technical solution: a replaceable air permeability meter test chamber, including an upper test head and a lower test head for clamping the sample, and a fixed base and a quick-release mechanism for detachably connecting the fixed base and the upper test head. The quick-release mechanism includes one or more sets of baffles and one set of flanges. Each set of baffles includes two or more baffles spaced apart along the circumferential direction of the fixed base. The flanges are spaced apart along the circumferential direction of the top of the upper test head and are engaged with the baffles. The upper test head is rotatably arranged relative to the circumferential direction of the fixed base.

[0010] Furthermore, a locking spring is provided between the fixed base and the upper test head. One end of the locking spring is fixedly connected to the fixed base, and the other end of the locking spring is located in a circular hole. The circular hole is opened at the position where the upper test head contacts the fixed base. A protruding positioning block is provided on the inner side of the flange, and a corresponding positioning groove is provided on the stop edge.

[0011] Furthermore, a positioning pin is provided at the engagement position between the flange and the guard.

[0012] Furthermore, multiple sets of retaining edges are arranged at intervals along the height direction of the fixed seat.

[0013] Furthermore, each set of guards consists of two, symmetrically located at both ends of the bottom of the fixed base. Correspondingly, there are also two flanges, symmetrically located at both ends of the top of the upper test head.

[0014] Furthermore, a drive component is provided above the mounting base.

[0015] The beneficial effects of this utility model are as follows: In this utility model, the fixed base is detachably connected to the upper test head through a quick-release mechanism. The upper test head can be easily replaced through the quick-release mechanism, which can adapt to samples with different test areas, different test shapes and different test methods, improve the applicability of a single air permeability meter, and is convenient, reliable and repeatable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the device described in Example 1; Figure 2 This is a rear view structural diagram of the device described in Example 1; Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure; Figure 4 This is a cross-sectional view of the fixing seat in Example 1; Figure 5 This is a schematic diagram showing the test head and the mounting base connected together. Figure 6 This is a schematic diagram showing the test head and the mounting base detached. Figure 7 This is a schematic diagram of the connection between the flange and the guard. Figure 8 This is a schematic diagram of the main structure of the device described in Example 2; Figure 9 for Figure 7 A cross-sectional view; Figure 10 This is a cross-sectional view of the fixing seat in Example 2; Figure 11 This is a schematic diagram after the test chamber has been replaced; In the figure: 1. Drive mechanism, 2. Fixed seat, 3. Upper test head, 4. Lower test head, 5. Sealing ring, 6. Upper cavity air hole, 7. Locking spring, 8. Lower cavity air hole, 9. Side guard, 10. Flanged edge, 11. Positioning block, 12. Positioning groove, 13. Positioning pin, 14. Positioning pin hole, 15. Arc-shaped sample. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1 This embodiment discloses a replaceable air permeability meter test chamber, such as... Figure 1 , 2As shown in Figure 3, the device includes a drive mechanism 1, a fixed base 2, an upper test head 3, a lower test head 4, and a quick-release mechanism fixed base 2. The drive mechanism 1 is connected to the fixed base 2. The fixed base 2 is detachably connected to the upper test head 3 via the quick-release mechanism. The lower test head 4 is located below the upper test head 3, and the sample is located between the upper test head 3 and the lower test head 4. A sealing ring 5 is provided on the contact surface of the upper test head 3 and the lower test head 4. The drive component 1 is generally a component that can generate linear motion, such as a cylinder, electric cylinder, or hydraulic cylinder, which drives the upper test head 3 to move downward and press against the lower test head 4. The upper test head 3 has an upper chamber air hole 6, and the lower test head 4 has a lower chamber air hole 8. During the test, gas enters from the upper chamber air hole 6 of the upper test head 3, passes through the sample, and exits from the lower chamber air hole 8 of the lower test head 4.

[0019] The quick-release mechanism enables rapid replacement of the upper test head 3, such as... Figure 3 , 4 As shown in Figure 5, the quick-release mechanism includes a set of retaining edges 9 and a set of flanges 10. Each set of retaining edges 9 includes two retaining edges 9, which are spaced apart along the circumference of the fixed base 2. In this embodiment, the two retaining edges 9 are symmetrically located at both ends of the bottom of the fixed base 10. There are also two flanges 10, which are spaced apart along the circumference of the top of the upper test head 3. In this embodiment, the two flanges 10 are symmetrically located at both ends of the top of the upper test head 3. The flanges 10 engage with the retaining edges 9, and the upper test head 3 rotates relative to the fixed base 22 in the circumferential direction. A locking spring 8 is provided between the fixed base 22 and the upper test head 3. One end of the locking spring 8 is fixedly connected to the fixed base 22, and the other end of the locking spring 8 is located in a circular hole. The circular hole is located at the contact point between the upper test head 3 and the fixed base 2. Figure 7 The flange 10 has a raised positioning block 11 on its inner side, and the guard edge 9 has a corresponding positioning groove 12.

[0020] When the upper test head 3 is connected to the fixed base 2, rotate the upper test head 3 by 90°, aligning the positioning block 11 with the positioning groove 12. Then, release the upper test head 3. The upper test head 3 will be pressed downwards by the locking spring 8, causing the positioning block 11 to engage in the positioning groove 12, thus positioning the upper test head 3. To disassemble or replace the upper test head 3, simply push it upwards. The upper test head 3 will then switch from the locked state to the movable state. After rotating 90°, the upper test head 3 can be separated from the fixed base 2. The separated state is as follows: Figure 6 As shown; after aligning the new upper test head 3 and the fixed base 2, rotate 90° in the opposite direction to complete the replacement of the test chamber. Figure 11 The diagram shows the result after the test chamber was replaced. A new test chamber was used specifically for testing the arc-shaped sample 15.

[0021] Example 2 This embodiment discloses a replaceable air permeability meter test chamber, such as... Figure 8 ,9 As shown in Figure 10, the device includes a drive mechanism 1, a fixed base 2, an upper test head 3, a lower test head 4, and a quick-release mechanism. The drive mechanism 1 is connected to the fixed base 2. The fixed base 2 is detachably connected to the upper test head 3 via the quick-release mechanism. The lower test head 4 is located below the upper test head 3, and the sample is located between the upper test head 3 and the lower test head 4. A sealing ring 5 is provided on the contact surface between the upper test head 3 and the lower test head 4. The drive component 1 is generally a cylinder, electric cylinder, hydraulic cylinder, or other component capable of linear motion, driving the upper test head 3 downwards to press against the lower test head 4. The upper test head 3 has an upper chamber air hole 6, and the lower test head 4 has a lower chamber air hole 8. During the test, gas enters from the upper chamber air hole 6 of the upper test head 3, passes through the sample, and exits from the lower chamber air hole 8 of the lower test head 4.

[0022] The quick-release mechanism enables rapid replacement of the upper test head 3. In this embodiment, the quick-release mechanism includes multiple sets of retaining edges 9 and one set of flanges 10. The multiple sets of retaining edges 9 are arranged at intervals along the height direction of the fixed base 2. Each set includes two retaining edges 10 spaced apart along the circumferential direction of the fixed base 2. Specifically, the two retaining edges 9 are symmetrically located at both ends of the bottom of the fixed base 10. There are also two flanges 10, which are spaced apart along the circumferential direction of the top of the upper test head 3. Specifically, the two flanges 10 are symmetrically located at both ends of the top of the upper test head 3. The flanges 10 are engaged with the retaining edges 9, and the upper test head 3 is rotatably positioned relative to the fixed base 22 in the circumferential direction. To achieve positioning of the upper test head 3, a positioning pin 13 is provided at the engagement position between the flange 10 and the retaining edge 9. A positioning pin hole 14 is opened on the fixed base 2, and the positioning pin 13 is located in the positioning pin hole 14.

[0023] When replacing the upper test head 3, loosen the positioning pin 13, allowing the upper test head 3 to rotate. After rotating 90°, the upper test head 3 can be separated from the fixed base 2. Align the new upper test head 3 with the fixed base 2, then rotate it 90° in the opposite direction. Insert the positioning pin 13 into the positioning pin hole 14 to complete the replacement of the upper test head 3. Furthermore, the fixed base 2 is equipped with multiple sets of flanges 9. When testing samples of different thicknesses, the upper test head 3 does not need to be replaced; simply engaging the flange 10 with flanges 9 of different heights will suffice for testing samples of different thicknesses.

[0024] The above description is only the basic principle and preferred embodiment of this utility model. Any improvements and substitutions made by those skilled in the art based on this utility model shall fall within the protection scope of this utility model.

Claims

1. A replaceable air permeability meter test chamber, comprising an upper test head and a lower test head for holding a sample, characterized in that: It also includes a fixed base and a quick-release mechanism for detachably connecting the fixed base and the upper test head. The quick-release mechanism includes one or more sets of guards and one set of flanges. Each set of guards includes two or more guards spaced apart along the circumferential direction of the fixed base. The flanges are spaced apart along the circumferential direction of the top of the upper test head and are engaged with the guards. The upper test head is rotated relative to the circumferential direction of the fixed base.

2. The replaceable air permeability meter test chamber according to claim 1, characterized in that: A locking spring is provided between the fixed base and the upper test head. One end of the locking spring is fixedly connected to the fixed base, and the other end of the locking spring is located in the circular hole. The circular hole is opened at the position where the upper test head contacts the fixed base. A protruding positioning block is provided on the inner side of the flange, and a corresponding positioning groove is provided on the stop edge.

3. The replaceable air permeability meter test chamber according to claim 1, characterized in that: The engagement point between the flange and the guard is equipped with a positioning pin.

4. The replaceable air permeability meter test chamber according to claim 3, characterized in that: Multiple sets of retaining edges are arranged at intervals along the height direction of the fixed seat.

5. The replaceable air permeability meter test chamber according to claim 2 or 3, characterized in that: Each set of guards consists of two, symmetrically located at both ends of the bottom of the fixed base. Correspondingly, there are also two flanges, symmetrically located at both ends of the top of the upper test head.

6. The replaceable air permeability meter test chamber according to claim 1, characterized in that: A drive unit is located above the mounting base.

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