Penetration point detector and detection equipment

Abstract

The utility model relates to the technical field of pore detection, and discloses a permeation point detector and detection equipment. The permeation point detector comprises an air supply part, a mounting part and developing test paper, the air supply part is provided with an air inlet and a mounting port, and the air inlet is used for communicating with an air source; the mounting part is movably arranged on the air supply part, a detection opening communicated with the mounting opening is formed in the mounting part, and the detection opening is used for fixing a sample; the developing test paper is positioned on one side of the sample deviating from the mounting opening. The penetration point detector can meet the requirements of low detection limit and defect distribution detection.

Description

Technical Field

[0001] This utility model relates to the field of porosity detection technology, specifically to a permeability point detector and detection equipment. Background Technology

[0002] Copper foil is a raw material for products such as circuit boards and lithium battery electrodes. Pinholes and penetration points are two common defects in the copper foil production process. The detection and control of defects are of great significance for improving the performance of copper foil.

[0003] Some related technologies use backlight detection or high-resolution camera imaging to detect defects, which can accurately identify the location of defects. However, this method is only suitable for detecting light-transmitting pinholes and is difficult to detect opaque tilted pinholes and penetration defects in copper foil, and cannot accurately reflect the porosity of copper foil.

[0004] Other related technologies detect pinholes and penetration points by coating the copper foil surface with dilute sulfuric acid and observing the penetration of the sulfuric acid on the foil surface. This can detect opaque, tilted pinholes and penetration defects. However, liquids have surface tension and capillary action, and the diameter of the pores that can be penetrated is usually in the micrometer range (1μm–10μm). The penetration effect is insufficient for pores smaller than 1μm, and the detection limit is too high. Copper foil products that pass the coating test still have penetration points during high-temperature pressing, which cannot meet the needs of high-precision copper foil production.

[0005] Some related technologies apply pressure to the copper foil from one side and detect the change in gas pressure on the other side of the copper foil after a certain period of time to reflect the porosity of the copper foil (that is, the sum of pinhole rate and permeability). Gas has a stronger penetrating ability, so it can more accurately detect unqualified copper foil products. However, the change in gas pressure cannot reflect the specific distribution of pinholes and permeation points on the copper foil, making it difficult to provide a reference for subsequent process improvement and defect control.

[0006] Therefore, existing detection methods are insufficient to meet the needs of low detection limits and defect distribution detection. Utility Model Content

[0007] In view of this, the present invention provides a penetration point detector and detection equipment to solve the problem that existing defect detection methods are unable to meet the requirements of low detection limits and defect distribution detection.

[0008] In a first aspect, this utility model provides a penetration point detector, including a gas supply component, a mounting component, and a colorimetric test paper. The gas supply component has an air inlet and a mounting port, and the air inlet is used to connect to a gas source. The mounting component is movably disposed on the gas supply component, and the mounting component has a detection port that communicates with the mounting port, and the detection port is used to fix the sample. The colorimetric test paper is located on the side of the sample away from the mounting port.

[0009] Beneficial effects: During testing, the sample is mounted on the mounting component, and the gas supply component is connected to the gas source. The gas source provides gas that can react with the colorimetric test paper. The gas enters the gas supply component through the inlet and is then blown onto the sample at the test port through the mounting port. The gas can pass through tiny pinholes and penetration points in the sample and reach the colorimetric test paper on the other side of the sample, causing the corresponding position on the test paper to change color. On the one hand, because the gas has strong penetrating power, it can detect pores smaller than micrometers, giving the penetration point detector a lower detection limit. On the other hand, only the areas on the colorimetric test paper that come into contact with the gas will react with color, and the distribution of the color-changing positions can reflect the specific distribution of pinholes and penetration points on the copper foil. Therefore, the penetration point detector can meet the needs of low detection limits and defect distribution detection.

[0010] In one alternative embodiment, the sample is located between the mounting component and the gas supply component, the mounting component including an outer frame that presses the sample and the colorimetric test paper against the wall of the mounting port.

[0011] Beneficial effects: The sample is pressed tightly between the mounting component and the gas supply component, and the sample can cover the mounting opening, forming a first gas chamber between the sample and the gas supply component. The gas pressure in the first gas chamber is greater than atmospheric pressure, thereby enhancing the gas's penetration ability and further reducing the detection limit of the penetration point detector. The outer frame fixes the sample edge, which can improve the fixation stability and at the same time prevent stress concentration that could lead to sample breakage due to excessive detection gas pressure in the first gas chamber.

[0012] In one alternative embodiment, the outer frame surrounds the detection port, and the mounting component further includes a carrier net disposed on the outer frame, the carrier net supporting the sample.

[0013] Beneficial effects: The support net can support the sample from the side away from the installation port, preventing the sample from deforming or even breaking under the pressure of the first air chamber, avoiding the creation of new pores due to sample deformation, and improving the reliability and accuracy of the permeability point detector.

[0014] In one alternative embodiment, the aperture ratio of the carrier mesh is greater than 80%.

[0015] Beneficial effects: By making the opening ratio greater than 80%, the obstruction of the carrier mesh to gas flow can be minimized while ensuring the support effect, thus reducing interference with detection.

[0016] In an alternative embodiment, a first seal is further included, which is disposed between the air supply member and the sample, and / or the first seal is disposed between the outer frame and the sample.

[0017] Beneficial effects: The first sealing element can enhance the airtightness of the first air chamber, help increase the air pressure in the first air chamber, and enhance the gas penetration ability.

[0018] In one optional embodiment, the mounting component is detachably disposed on the wall of the mounting port; the mounting component is provided with a first quick-release structure, and the air supply component is provided with a second quick-release structure that matches the first quick-release structure.

[0019] Beneficial effects: The detachable connection method makes it easier to replace samples and improves the detection efficiency of the penetration point detector; the first and second quick-release structures simplify the assembly and disassembly steps of the mounting components, further improving the detection efficiency of the penetration point detector.

[0020] In one alternative embodiment, the device further includes a cover over the detection port, and the mounting element is disposed between the cover and the air supply element.

[0021] Beneficial effects: A second air chamber is formed between the cover and the mounting component. This second air chamber can separate the detection port from the external environment, preventing gases in the environment from interfering with the colorimetric reaction and improving the detection accuracy of the penetration point detector.

[0022] In one alternative embodiment, a second seal is further included, through which the cover body is sealed to the mounting component.

[0023] Beneficial effects: The second seal can enhance the airtightness of the second chamber and reduce the risk of gas in the environment entering the second chamber.

[0024] In one alternative embodiment, the cover includes a pressure relief port that communicates with the detection port.

[0025] Beneficial effect: The gas in the second chamber is discharged directionally through the pressure relief port, which can reduce the pressure in the second chamber and prevent the gas from being obstructed from passing through the sample due to excessive pressure in the second chamber.

[0026] Secondly, this utility model provides a detection device, including a penetration point detector and a gas cylinder provided by this utility model. The gas cylinder is connected to the air inlet and is used to provide detection gas. The detection gas is suitable for reacting with the colorimetric test paper to produce a colorimetric reaction.

[0027] Beneficial effects: The detection equipment provided by this utility model includes the penetration point detector provided by this utility model, and therefore has the corresponding beneficial effects brought by the penetration point detector, which will not be elaborated here. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a penetration point detector according to an embodiment of the present invention;

[0030] Figure 2 This is an exploded structural diagram of a penetration point detector according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of a detection device according to an embodiment of the present utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Gas supply component; 101. Air inlet; 102. Mounting port; 103. Second quick-release structure; 2. Mounting component; 201. Outer frame; 202. Carrier net; 203. First quick-release structure; 204. Third quick-release structure; 3. Colorimetric test paper; 4. Cover; 401. Pressure relief port; 402. Fourth quick-release structure; 5. Gas cylinder; 9. Sample. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a," "an," and "comprising" as used herein may also mean including the plural forms. The terms "comprising," "including," and "having" are inclusive and therefore indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0036] Although terms such as "first," "second," etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Furthermore, in the description of this utility model, unless otherwise expressly specified and limited, the terms "set up" and "connected" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "end," "length," "inner," "outer," etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation, in addition to those depicted in the figure. For example, if the mechanism in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The mechanism may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0038] Pinholes and penetration points are two common defects in copper foil production, collectively referred to as porosity. During production, it is necessary to test the porosity (the sum of pinhole rate and penetration rate) to determine whether the copper foil is qualified. In some cases, it is also necessary to test the distribution of pinholes and penetration points on the copper foil in order to infer the causes of pinholes and penetration points, and to provide a reference for the improvement and upgrading of production processes and the maintenance of production equipment.

[0039] Some related technologies reflect porosity by detecting changes in gas pressure, achieving low detection limits, but cannot detect the distribution. Other related technologies reflect porosity by coating with dilute sulfuric acid, which can detect the distribution, but have high detection limits, and the results of porosity and pore distribution are not accurate enough.

[0040] The following is combined Figures 1 to 3 The following describes embodiments of the present invention.

[0041] Reference Figure 1 , Figure 2 , Figure 3 According to an embodiment of the present invention, a penetration point detector is provided, including an air supply component 1, a mounting component 2, and a colorimetric test paper 3. The air supply component 1 has an air inlet 101 and a mounting port 102, and the air inlet 101 is used to connect to an air source. The mounting component 2 is movably mounted on the air supply component 1, and the mounting component 2 has a detection port that communicates with the mounting port 102. The detection port is used to fix the sample 9. The colorimetric test paper 3 is located on the side of the sample 9 away from the mounting port 102.

[0042] During testing, sample 9 is mounted on mounting component 2, and gas supply component 1 is connected to gas source. The gas source provides gas that can react with colorimetric test paper 3. The gas enters gas supply component 1 through gas inlet 101 and is then blown towards sample 9 at the test port through mounting port 102. The gas can pass through tiny pinholes and penetration points in sample 9 and reach colorimetric test paper 3 located on the other side of sample 9, causing the corresponding position on colorimetric test paper 3 to change color.

[0043] On the one hand, because gases have strong penetrating power (able to penetrate pores with a minimum diameter of about 0.0003 μm to 0.002 μm), they can detect pores below the micrometer level, giving the permeation point detector a lower detection limit.

[0044] For example, copper foil No. 1, copper foil No. 2, and copper foil No. 3 were used as samples 9, and the permeability point detector of this utility model was used for testing. The number of pores detected by the sulfuric acid coating method was 0, 2, and 1, respectively, and the number of pores detected by this utility model was 102, 130, and 110, respectively.

[0045] On the other hand, only the areas on the colorimetric test paper 3 that come into contact with the gas will develop a color reaction. The distribution of the color change locations can reflect the specific distribution of pinholes and penetration points on the copper foil, providing a reference for subsequent process improvement and defect control.

[0046] For example, if the pores are clearly concentrated in a specific area of ​​sample 9 and appear periodically, the pores may be caused by quality defects in the rollers of the production equipment, and the production equipment needs to be inspected and repaired.

[0047] Therefore, the penetration point detector can meet the needs of low detection limits and defect distribution detection.

[0048] It is understood that the sample 9 can be a copper foil, or other structures that have porosity detection requirements and are permeable to gas, especially foil structures. This utility model does not impose specific restrictions on the type of sample 9.

[0049] In order to improve the sensitivity of the colorimetric test paper 3, in some embodiments, the colorimetric test paper 3 can be attached to the surface of the sample 9 so that the gas passing through the pores can contact the colorimetric test paper 3 immediately, ensuring that the color-changing part of the colorimetric test paper 3 more realistically and accurately reflects the distribution of pores on the sample 9.

[0050] In some embodiments, the sample 9 is located between the mounting member 2 and the air supply member 1. The mounting member 2 includes an outer frame 201, which presses the sample 9 and the colorimetric test paper 3 against the wall of the mounting port 102.

[0051] The sample 9 is pressed between the mounting part 2 and the air supply part 1, thereby using the air supply part 1 to fix the sample 9, which helps to simplify the structure of the mounting part 2 and avoids the need for the permeation point detector to add an additional structure for fixing the sample 9.

[0052] Furthermore, the sample 9 can cover the installation port 102, forming a first air chamber between the sample 9 and the gas supply component 1, producing a certain sealing effect. Under the action of the gas source, the gas pressure in the first air chamber is greater than the atmospheric pressure, thereby enhancing the gas penetration ability and further reducing the detection limit of the permeation point detector.

[0053] However, it should be noted that sample 9 is generally copper foil or other foil sheets. The foil is relatively thin and is prone to breakage under excessive pressure, resulting in new pores in the foil and interfering with the test results.

[0054] Therefore, in some embodiments, the outer frame 201 surrounds and forms the detection port, and the mounting component 2 also includes a support mesh 202, which is disposed on the outer frame 201 and supports the sample 9. The support mesh 202 can support the sample 9 from the side away from the mounting port 102, preventing the sample 9 from deforming or even breaking under the pressure of the first gas chamber, avoiding the creation of new pores due to the deformation of the sample 9, and improving the reliability and accuracy of the permeability point detector.

[0055] For example, refer to Figure 2 In some embodiments, the carrier mesh 202 is composed of a combination of crisscrossing grid plates. In other embodiments not shown, the carrier mesh 202 may also adopt other types of structural designs, which are not limited by this invention.

[0056] Optionally, in some embodiments, the open area ratio of the carrier mesh 202 is greater than 80%. In other words, the projected area of ​​the carrier mesh 202 accounts for no more than 20% of the area of ​​the detection port. By making the open area ratio greater than 80%, the obstruction of gas flow and the blocking of penetration points by the carrier mesh 202 can be minimized while ensuring the support effect, thereby reducing interference with the detection. In some embodiments, the penetration point detector further includes a first sealing element (not shown in the figure), which is disposed between the gas supply element 1 and the sample 9, and / or between the outer frame 201 and the sample 9. The first sealing element can enhance the airtightness of the first gas chamber, which helps to increase the gas pressure in the first gas chamber and enhance the gas penetration ability.

[0057] Exemplarily, in some embodiments, the number of first seals is two, with first seals provided between the air supply member 1 and the sample 9, and between the outer frame 201 and the sample 9. Specifically, refer to... Figure 2 The first sealing element can be a sealing ring. The end face of the mounting port 102 of the air supply element 1 is provided with a first sealing groove, and the end face of the outer frame 201 facing the air supply element 1 is provided with a second sealing groove. The two first sealing elements are respectively embedded in the first sealing groove and the second sealing groove.

[0058] In some embodiments, the mounting component 2 is detachably mounted on the wall of the mounting port 102. This detachable connection allows for easier replacement of the sample 9, improving the detection efficiency of the permeability point detector.

[0059] Specifically, for Figure 2 In the embodiment shown, the sample 9 is clamped between the mounting part 2 and the gas supply part 1. After removing the mounting part 2, the sample 9 is fully exposed, allowing for easy replacement. In other embodiments (not shown), the sample 9 is individually fixed to the mounting part 2. The permeability point detector can be equipped with multiple replaceable mounting parts 2. During the testing process, a new sample 9 and colorimetric paper 3 can be pre-fixed to a replacement mounting part 2. After the test is completed and the mounting part 2 is removed, the replacement mounting part 2 can be directly installed on the gas supply part 1, saving replacement time.

[0060] Optionally, in some embodiments, the mounting component 2 is provided with a first quick-release structure 203, and the air supply component 1 is provided with a second quick-release structure 103 that matches the first quick-release structure 203. By utilizing the first quick-release structure 203 and the second quick-release structure 103, the assembly and disassembly steps of the mounting component 2 can be simplified, further improving the detection efficiency of the permeability point detector.

[0061] For example, refer to Figure 2The first quick-release structure 203 is a buckle set on the outer periphery of the outer frame 201, and the second quick-release structure 103 is a flange protruding from the surface of the air supply component 1. The buckle can be elastically deformed. When the mounting component 2 is pressed against the air supply component 1, the buckle hooks the flange to fix the mounting component 2 and the air supply component 1. The mounting component 2 can be easily removed by prying open the buckle.

[0062] Of course, the first quick-release structure 203 and the second quick-release structure 103 can also adopt other structural designs. For example, in some embodiments not shown, the first quick-release structure 203 can use a latch, and correspondingly, the second quick-release structure 103 is a hook disposed on the outer periphery of the air supply component 1. The latch engages with the hook to secure the mounting component 2 and the air supply component 1. The latch can provide greater clamping force, improve the sealing effect of the first air chamber, and make unlocking the latch more convenient.

[0063] Furthermore, besides being detachable, the mounting member 2 can also be movably mounted on the air supply member 1 in other ways. For example, in some embodiments not shown, the mounting member 2 can be hinged to the air supply member 1, and the sample 9 can be clamped or released by flipping the mounting member 2. Other feasible movable connection methods can be found in related technologies, and will not be elaborated here.

[0064] In some embodiments, the permeability point detector further includes a cover 4, which covers the detection port, and a mounting member 2 is disposed between the cover 4 and the gas supply member 1. A second gas chamber is formed between the cover 4 and the mounting member 2. The second gas chamber can separate the detection port from the external environment, avoid interference from gases in the environment with the colorimetric reaction, and improve the detection accuracy of the permeability point detector.

[0065] In some embodiments, the permeation point detector further includes a second seal, through which the cover 4 is sealed to the mounting member 2. The second seal enhances the airtightness of the second chamber, reducing the risk of gases from the environment entering the second chamber.

[0066] In some embodiments, the cover 4 includes a pressure relief port 401, which is connected to the detection port. Gas in the second chamber is discharged directionally through the pressure relief port 401, which can reduce the pressure in the second chamber and prevent the gas from being obstructed from passing through the sample 9 due to excessive pressure in the second chamber.

[0067] Secondly, referring to Figure 3 This utility model provides a detection device, including a penetration point detector and a gas cylinder 5. The gas cylinder 5 is connected to an air inlet 101 to provide detection gas. The detection gas is suitable for reacting with the colorimetric test paper 3 to produce a colorimetric reaction.

[0068] The detection equipment provided by this utility model includes the penetration point detector provided by this utility model, and therefore has the beneficial effects brought by the penetration point detector, which will not be elaborated here.

[0069] It is understandable that there are several feasible options for the detection gas and the colorimetric test strip 3. For example, the detection gas and the colorimetric test strip 3 can use one of the following:

[0070] The gas being detected is sulfur dioxide. The colorimetric test paper 3 is a chemical colorimetric test paper 3. The colorimetric principle is that potassium iodate / fuchsin-formaldehyde is reduced. The color change of the colorimetric test paper 3 is either fading or turning red.

[0071] The gas being detected is hydrogen sulfide, and the colorimetric test paper 3 is lead acetate test paper. The colorimetric principle is the generation of lead sulfide, and the color change of the colorimetric test paper 3 is from white to black.

[0072] The gas being detected is chlorine, and the colorimetric test paper 3 is o-toluidine test paper. The colorimetric principle is an oxidation reaction, and the color change of the colorimetric test paper 3 is from colorless to yellow or blue.

[0073] The gas being detected is ammonia. Colorimetric test paper 3 is a pH indicator paper. The colorimetric principle is based on pH change. The color change of colorimetric test paper 3 is from yellow to blue (bromophenol blue).

[0074] The gas being detected is ozone, and the colorimetric test strip 3 is indigo carmine test strip. The colorimetric principle is ozone oxidation, and the color change of the colorimetric test strip 3 is from blue to colorless.

[0075] The gas being detected is nitrogen oxides, and the colorimetric test paper 3 is Griess reagent test paper. The colorimetric principle is the generation of azo dyes, and the color change of the colorimetric test paper 3 is from white to pink.

[0076] The gas being detected is formaldehyde. Colorimetric test paper 3 is an acetylacetone method test paper. The colorimetric principle is the formation of a dihydropyridine derivative. The color change of colorimetric test paper 3 is from yellow to brown.

[0077] The gas being detected is carbon monoxide, and the colorimetric test paper 3 is a palladium salt test paper. The colorimetric principle is that carbon monoxide reduces palladium ions to elemental palladium, and the color change of the colorimetric test paper 3 is from white to black.

[0078] The gas being detected is carbon dioxide, and the colorimetric test strip 3 is bromothymol blue test strip. The colorimetric principle is that as the pH decreases, the color of the colorimetric test strip 3 changes from blue to yellow.

[0079] In actual implementation, depending on the sample 9, a detection gas that will not react with the sample 9 can be selected for permeation point detection. This utility model does not impose any restrictions on this.

[0080] In some embodiments, the detection device further includes a gas valve, which is disposed on the pipeline connecting the permeability detector and the gas cylinder 5, for controlling the pressure and flow rate of the detection gas.

[0081] The preferred pressure range varies depending on the gas being detected. For example, when using acidic gas test paper, the pressure range is 0.1 bar to 1 bar (i.e., normal to low pressure), and the recommended flow rate range is 0.5 L / min to 2 L / min. When using alkaline gas test paper, no additional pressurization is required; the gas can diffuse naturally or a flow rate of 0.1 L / min to 0.5 L / min can be used. When using oxidizing gas test paper, the pressure range is 0.05 bar to 0.5 bar, and the recommended flow rate range is 0.2 L / min to 1 L / min. When using VOCs test paper, the pressure range is normal to 0.3 bar, and the recommended flow rate range is 0.1 to 0.3 L / min. When using carbon monoxide / carbon dioxide test paper, the pressure range is 0.2 bar to 1 bar, and the recommended flow rate range is 1 L / min to 5 L / min, with a higher flow rate required, especially for carbon monoxide.

[0082] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A penetration point detector, characterized in that, include: The air supply component (1) has an air inlet (101) and an installation port (102), wherein the air inlet (101) is used to connect to an air source; Mounting component (2), which is movably mounted on the air supply component (1), and the mounting component (2) has a detection port communicating with the mounting port (102), which is used to fix the sample (9); The colorimetric test paper (3) is located on the side of the sample (9) away from the mounting port (102).

2. The permeability point detector according to claim 1, characterized in that, The sample (9) is located between the mounting component (2) and the air supply component (1). The mounting component (2) includes an outer frame (201) that presses the sample (9) and the colorimetric test paper (3) against the wall of the mounting port (102).

3. The permeability point detector according to claim 2, characterized in that, The outer frame (201) surrounds and forms the detection port. The mounting component (2) also includes a carrier net (202), which is disposed on the outer frame (201) and supports the sample (9).

4. The permeability point detector according to claim 3, characterized in that, The aperture ratio of the carrier mesh (202) is greater than 80%.

5. The permeability point detector according to claim 2, characterized in that, It also includes a first seal disposed between the air supply member (1) and the sample (9), and / or the first seal disposed between the outer frame (201) and the sample (9).

6. The permeability point detector according to claim 1, characterized in that, The mounting component (2) is detachably mounted on the wall of the mounting port (102); The mounting component (2) is provided with a first quick-release structure (203), and the air supply component (1) is provided with a second quick-release structure (103) that matches the first quick-release structure (203).

7. The permeability point detector according to any one of claims 1 to 6, characterized in that, It also includes a cover (4), which covers the detection port, and the mounting member (2) is disposed between the cover (4) and the air supply member (1).

8. The permeability point detector according to claim 7, characterized in that, It also includes a second seal, through which the cover (4) is sealed to the mounting member (2).

9. The permeability point detector according to claim 7, characterized in that, The cover (4) includes a pressure relief port (401), which is connected to the detection port.

10. A testing device, characterized in that, include: The permeability point detector according to any one of claims 1 to 9; A gas cylinder (5) is connected to the air inlet (101) for providing detection gas, which is suitable for reacting with the colorimetric test paper (3) to produce a colorimetric reaction.

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