Material Sealing Performance Measurement Equipment and Method

Abstract

The present disclosure provides a device and method for measuring the sealing performance of a material, belonging to the technical field of material performance measurement. The device includes an upper base body and a lower base body; the upper base body is located above the lower base body, and a measurement material accommodation position is formed between the upper base body and the lower base body; the upper base body has a test liquid tank, the test liquid tank is communicated with the measurement material accommodation position, and the side wall of the test liquid tank has a transparent liquid level scale area. The present disclosure can accurately and quickly measure the sealing characteristics of a sealing material (such as foam).

Description

Technical Field

[0001] The present disclosure relates to the technical field of material property measurement, and particularly to an apparatus and method for measuring the sealing performance of a material. Background Art

[0002] In various products such as vehicles and electronic devices, there is often a need for component sealing. Sealing can be achieved by filling specific materials, such as foam and silicone. When performing a sealing process by filling a specific material, since the sealing performance of different filling materials may vary, in order to select a suitable sealing material, it is necessary to measure the sealing performance of the sealing material.

[0003] In the related art, generally, a sealing material (such as foam) is made into a U shape and clamped and fixed, a test liquid of a predetermined volume is injected from the opening of the U shape, and the seepage phenomenon of the test liquid is observed after a predetermined time to determine the sealing performance of the material.

[0004] However, the above method can only simply evaluate whether the material has sealing performance. For different materials with seepage phenomena, the specific sealing performance differences of these materials cannot be accurately determined. Summary of the Invention

[0005] In view of this, the present disclosure provides an apparatus and method for measuring the sealing performance of a material, which can accurately and quickly measure the sealing characteristics of a sealing material (such as foam).

[0006] Specifically, the following technical solutions are included:

[0007] In a first aspect, an apparatus for measuring the sealing performance of a material is provided, including an upper base and a lower base;

[0008] The upper base is located above the lower base, and a position for accommodating a material to be tested is formed between the upper base and the lower base;

[0009] The upper base has a test liquid tank, the test liquid tank is communicated with the position for accommodating the material to be tested, and the side wall of the test liquid tank has a transparent liquid level scale area.

[0010] Optionally, the lower base has a water permeable hole communicated with the position for accommodating the material to be tested; or, the lower base is a water blocking structure.

[0011] Optionally, the upper base and the lower base are detachably connected.

[0012] Optionally, the upper base has a lateral extension plate connected to the side wall of the test liquid tank, the lateral extension plate surrounds the test liquid tank and extends radially outward from the side wall at the lower end of the test liquid tank; the lower base is a plate-like structure;

[0013] The lateral extension plate and the lower base have a first locking structure respectively, and the device further comprises a second locking structure, wherein the first locking structure cooperates with the second locking structure to detachably connect the lateral extension plate to the lower base;

[0014] At least a portion of the accommodating position for the material to be tested is formed between the lateral extension plate and the lower base.

[0015] Optionally, the device further comprises a material compression rate adjustment structure, and the material compression rate adjustment structure cooperates with the second locking structure to make the height of the accommodating position of the material to be tested less than or equal to the original height of the test sample.

[0016] Optionally, the material compression rate adjustment structure includes a limit block;

[0017] The limiting block is located between the lateral extension plate and the lower base;

[0018] The second locking structure is used to make the height of the material receiving position to be tested and the height of the limit block form a preset relationship, and the preset relationship includes any one of the following: the two are equal and the difference between the two is a preset value.

[0019] Optionally, the material compression rate adjustment structure includes a plurality of limit blocks with different heights; or, the material compression rate adjustment structure includes a limit block with adjustable height.

[0020] In a second aspect, a method for determining sealing performance of a material is provided, the method comprising:

[0021] Prepare the test samples of the materials to be tested;

[0022] Placing the test sample in the material receiving position of the device as described above;

[0023] injecting a test liquid into the test liquid tank of the upper substrate of the device;

[0024] Reading the change in the level of the test liquid in the test liquid tank after the test sample has been immersed in the test liquid tank for a preset time through the liquid level scale area on the side wall of the test liquid tank;

[0025] Based on the amount of change in the liquid level, the sealing performance of the measurement sample is determined.

[0026] Optionally, the preparing of the measurement sample of the material to be measured comprises: preparing a block-shaped measurement sample of the material to be measured; the lower substrate of the device has a water-permeable hole connected to the receiving position of the material to be measured; or,

[0027] The preparing of the measurement sample of the material to be measured comprises: preparing a ring-shaped measurement sample of the material to be measured; and the lower substrate of the device is a water-blocking structure.

[0028] Optionally, the upper base body has a laterally extending plate connected to the side wall of the test liquid tank. The laterally extending plate surrounds the test liquid tank and extends radially outward from the side wall at the lower end of the test liquid tank. The lower base body is a plate-like structure. The laterally extending plate and the lower base body respectively have a first locking structure, and the device further includes a second locking structure. The first locking structure cooperates with the second locking structure to detachably connect the laterally extending plate and the lower base body. At least part of the accommodating position for the material to be measured is formed between the laterally extending plate and the lower base body. The device further includes a material compression ratio adjustment structure;

[0029] After placing the measurement sample in the accommodating position for the material to be measured, the method further includes:

[0030] Controlling, through the material compression ratio adjustment structure and the second locking structure, the height of the accommodating position for the material to be measured to be less than or equal to the original height of the measurement sample.

[0031] The embodiments of the present disclosure provide a device and method for measuring the sealing performance of a material. An accommodating position for the material to be measured is formed between the upper base body and the lower base body of the device. When measuring the sealing performance of the material to be measured, a measurement sample of the material to be measured can be prepared and placed in the accommodating position for the material to be measured, and then a test liquid is injected into the test liquid tank of the upper base body. Since the test liquid tank is communicated with the accommodating position for the material to be measured, the test liquid can flow to the measurement sample and impregnate the measurement sample. The side wall of the test liquid tank also has a transparent liquid level scale area. With the help of this liquid level scale area, the change in the liquid level of the test liquid can be read, and thus the water seepage amount of the measurement sample can be clearly, directly and quantitatively determined, and the sealing performance of the measurement sample can be quantified. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic structural diagram of a device for measuring the sealing performance of a material provided by an embodiment of the present disclosure;

[0034] Figure 2 It is a schematic structural diagram of another device for measuring the sealing performance of a material provided by an embodiment of the present disclosure;

[0035] Figure 3 It is a top view of a lower base body of a device for measuring the sealing performance of a material provided by an embodiment of the present disclosure;

[0036] Figure 4 The top view of another lower base of the material sealing performance measurement device provided by the embodiments of the present disclosure;

[0037] Figure 5 The top view of an upper base of the material sealing performance measurement device provided by the embodiments of the present disclosure;

[0038] Figure 6 The cross-sectional view (a) and top view (b) of an annular measurement sample provided by the embodiments of the present disclosure;

[0039] Figure 7 The cross-sectional view (a) and top view (b) of a block-shaped measurement sample provided by the embodiments of the present disclosure;

[0040] Figure 8 The schematic diagram of a compression ratio adjustment structure provided by the embodiments of the present disclosure;

[0041] Figure 9 The partial structure schematic diagram of an upper base provided by the embodiments of the present disclosure;

[0042] Figure 10 The flowchart of a material sealing performance measurement method provided by the embodiments of the present disclosure;

[0043] Figure 11 The flowchart of another material sealing performance measurement method provided by the embodiments of the present disclosure.

[0044] The reference signs in the figure are respectively represented as:

[0045] 10 - upper base; 101 - test liquid tank; 1011 - liquid level scale area; 10111 - first scale; 10112 - second scale; 102 - lateral extension plate;

[0046] 11 - lower base; 111 - water permeable hole;

[0047] 12 - measurement material accommodation position;

[0048] 131 - first locking structure; 132 - second locking structure;

[0049] 14 - material compression ratio adjustment structure; 141 - limit block; 1411 - first sub-limit block; 14111 - first fixing hole; 1412 - second sub-limit block; 14121 - second fixing hole; 1413 - fixing connecting piece;

[0050] 15 - measurement sample; 151 - block-shaped measurement sample; 152 - annular measurement sample.

[0051] Through the above-mentioned drawings, specific embodiments of the present disclosure have been shown, and will be described in more detail hereinafter. These drawings and the written description are not intended to limit the scope of the concept of the present disclosure in any way, but to illustrate the concept of the present disclosure to those skilled in the art by reference to specific embodiments. Detailed Description of Specific Embodiments

[0052] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0053] In the embodiments of the present disclosure, the "upper" involved refers to the side of the object that is relatively farther from the ground, and the "lower" involved refers to the side of the object that is relatively closer to the ground. Moreover, when the present disclosure describes the relative relationship, it is based on the device being in a normal use state.

[0054] Unless otherwise defined, all technical terms used in the embodiments of the present disclosure have the same meaning as commonly understood by those of ordinary skill in the art.

[0055] To make the technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail in conjunction with the drawings.

[0056] In a first aspect, referring to Figures 1-9 , the embodiments of the present disclosure provide a device for measuring the sealing performance of a material.

[0057] Referring to Figures 1-2 , the device for measuring the sealing performance of a material includes an upper base 10 and a lower base 11;

[0058] The upper base 10 is located above the lower base 11, and a receiving position 12 for the material to be tested is formed between the upper base 10 and the lower base 11;

[0059] The upper base 10 has a test liquid tank 101, the test liquid tank 101 is communicated with the receiving position 12 for the material to be tested, and the side wall of the test liquid tank 101 has a transparent liquid level scale area 1011.

[0060] In this embodiment, the upper substrate and the lower substrate are two substrates far from the ground and close to the ground respectively, and the upper substrate is located above the lower substrate (that is, in the use state, the upper substrate is located on the side of the lower substrate that is farther from the ground). A storage position for the material to be tested is formed between the two substrates, and the storage position for the material to be tested is used to place the measurement sample of the material to be tested. The upper substrate also has a test liquid tank, which is connected to the storage position for the material to be tested, and then when there is a test liquid in the test liquid tank, the test liquid can automatically flow to the measurement sample under the action of gravity and immerse the measurement sample. The side wall of the test liquid tank also has a transparent liquid level scale area, and the liquid level change or liquid volume change of the test liquid can be accurately read by means of the liquid level scale area. There is a proportional relationship between the liquid level change or liquid volume change of the test liquid and the amount of liquid seepage of the measurement sample. Therefore, by reading the liquid level change or liquid volume change of the test liquid, the amount of liquid seepage of the measurement sample can be accurately quantified, and then the sealing level of the measurement sample to water can be accurately evaluated. The sealing performance can be determined for different samples (such as closed cell foam, open cell foam or semi-open and semi-closed cell foam).

[0061] Optionally, the test liquid is water, such as distilled water. Alternatively, the test liquid is a colored liquid to facilitate liquid level reading.

[0062] In some embodiments, reference Figure 2 and 4 , the lower substrate 11 has a water-permeable hole 111 connected to the material receiving position 12 to be tested; or, reference Figure 1 and 3 , the lower substrate 11 is a water-blocking structure.

[0063] In this embodiment, the lower substrate of the device can have different structures. In the case where the lower substrate has a water-permeable hole, the device can be used to measure the sealing of the block measurement sample. The water-permeable hole set on the lower substrate is used to allow the liquid exuded from the block measurement sample to flow out, avoiding liquid accumulation, thereby making subsequent measurements more accurate. In the case where the lower substrate is a water-blocking structure, the device can be used to measure the sealing of the ring-shaped measurement sample, so that the liquid passing through the through hole in the center of the ring-shaped measurement sample cannot overflow, but can only seep out in the radial direction of the ring-shaped measurement sample, thereby ensuring that the amount of exudate is only related to the sealing of the measurement sample, improving the accuracy of the sealing performance of subsequent measurements.

[0064] The above two lower substrates can actually realize accurate measurement of the axial side sealing performance and radial side sealing performance of the sample to be tested, respectively, which matches the actual application scenario of the measured sample and can better complete the testing and development of the sealing performance of the material to be tested (such as foam).

[0065] Optionally, refer to Figures 6-7The block-shaped measurement sample 151 can be a sealed block with a diameter of 8 cm and a thickness of 10 cm; the ring-shaped measurement sample 152 can be a sealing ring with an inner diameter of 6 cm, an outer diameter of 8 cm, and a thickness of 10 cm. The parameters here are all the initial parameters before compression, and are only for illustration here, and can be adjusted adaptively according to requirements.

[0066] For the case where the radial side sealing performance (i.e., the ring-shaped measurement sample) needs to be measured, the inner diameter of the ring-shaped measurement sample needs to be equal to or greater than the inner diameter of the lower end of the test liquid tank, so that the liquid mainly impregnates the radial side wall of the ring-shaped measurement sample. For the case where the axial side sealing performance (i.e., the block-shaped measurement sample) needs to be measured, the diameter of the block-shaped measurement sample needs to be greater than the inner diameter of the lower end of the test liquid tank, so that the liquid mainly impregnates the axial surface of the block-shaped measurement sample.

[0067] It should be noted that the aforementioned dimensions and shapes are only examples and can be adjusted according to actual requirements.

[0068] In some embodiments, the device can be pre-equipped with the aforementioned two different lower bases to meet the test requirements in different situations. In other embodiments, the device can be equipped with a lower base having water-permeable holes and a mode switching component, and the mode switching component is used to block the water-permeable holes of the lower base to make it a water-blocking structure. The mode switching component can be a water-blocking sheet or a water-blocking film. When it is necessary to switch to a water-blocking structure, the water-blocking sheet or the water-blocking film is attached to the surface of the lower base to block the water-permeable holes. The orthographic projection of the water-blocking sheet or the water-blocking film on the lower base needs to cover the orthographic projection of the measurement sample on the lower base to avoid affecting the measurement accuracy.

[0069] In some embodiments, referring to Figures 1-2 , the upper base 10 and the lower base 11 are detachably connected.

[0070] By setting the upper base and the lower base to be detachably connected, it can be ensured that the device can be reused for measuring different samples. In addition, the detachable connection between the upper base and the lower base also facilitates the replacement of different lower bases to achieve the measurement of different types of samples.

[0071] In some embodiments, referring to Figures 1-5 , the upper base 10 has a lateral extension plate 102 connected to the side wall of the test liquid tank 101, and the lateral extension plate 102 surrounds the test liquid tank 101 and extends radially outward from the side wall of the lower end of the test liquid tank 101; the lower base 11 is a plate-like structure;

[0072] The lateral extension plate 102 and the lower base 11 respectively have a first locking structure 131, and the device further includes a second locking structure 132. The first locking structure 131 and the second locking structure 132 cooperate to detachably connect the lateral extension plate 102 and the lower base 11;

[0073] The lateral extension plate 102 forms at least a part of the position 12 for accommodating the material to be measured between it and the lower base body 11.

[0074] It should be noted that "extending radially outward" means extending in a direction away from the center along the radial direction of the test liquid tank with the central axis of the test liquid tank as the center. "Lateral" is a direction that intersects or is perpendicular to the extending direction of the test liquid tank. Optionally, the extending direction of the lateral extension plate can be perpendicular to the extending direction of the test liquid tank, and the lateral extension plate can be parallel to the horizontal plane when the device is in the use posture. The lower base body can also be parallel to the horizontal plane when the device is in the use posture. When testing, the liquid exuded from the measured sample can overflow the device through the edge position between the lateral extension plate and the lower base body. In this way, it can be ensured that the exuded liquid is discharged in time, and thus the test accuracy can be improved.

[0075] In this embodiment, referring to Figures 1-5 , the upper base body 10 is actually realized by connecting a cylindrical structure and a plate-like structure. The internal hollow channel of the cylindrical structure forms the test liquid tank. The plate-like structure (i.e., the lateral extension plate) has a communication hole equal to or close to the inner diameter of the test liquid tank. The cylindrical structure forms the upper base body 10 by connecting to the plate-like structure and aligning the test liquid tank with the communication hole. First locking structures are respectively arranged on the lateral extension plate and the lower base body. The second locking structure can cooperate with the first locking structure to detachably connect the lateral extension plate and the lower base body, and thus detachably connect the upper base body and the lower base body. At least a part of the position for accommodating the material to be measured is formed between the lateral extension plate and the lower base body. In this way, the measured sample can be at least partially located between the lateral extension plate and the lower base body, making the test more accurate. The position for accommodating the material to be measured further includes at least the part between the lower end of the test liquid tank and the lower base body, and this part is used to ensure that the test liquid can flow more smoothly into the position for accommodating the material to be measured to impregnate the measured sample. The size of the test liquid tank can remain unchanged or gradually change from top to bottom. This application does not limit this, and only needs to ensure that the outflow volume of the test liquid corresponds to the scale in the scale area.

[0076] With the help of the above locking structure, it can be ensured that the upper base body and the lower base body can be locked in the connected state and can also be conveniently disassembled to replace the measured sample.

[0077] Optionally, referring to Figures 1-5 , the first locking structure 131 can be a connection hole, and the second locking structure 132 can be a matching structure of a screw and a nut. In this way, by passing the screw through the connection holes of the lateral extension plate and the lower base body and tightening with the nut, the detachable connection of the upper base body and the lower base body can be realized.

[0078] In another embodiment, the first locking structure 131 and the second locking structure 132 can also be implemented by structures such as latches. The present application does not limit the specific implementation manner thereof.

[0079] In some embodiments, referring to Figures 1-2 , the device further includes a material compression ratio adjustment structure 14, and the material compression ratio adjustment structure 14 cooperates with the second locking structure 132 to make the height of the test material accommodation position 12 less than or equal to the original height of the measurement sample.

[0080] In this embodiment, the material compression ratio adjustment structure cooperates with the second locking structure, and can control the height of the test material accommodation position to be less than or equal to the original height of the test material, so that the height of the measurement sample is not compressed (when the height is equal to the original height) or has a certain compression (when the height is less than the original height). In this way, the sealing performance of the measurement sample at different compression ratios can be measured, and more detailed sealing performance parameters of the measurement sample can be obtained. It should be noted that the "original height" here refers to the height of the measurement sample when there is no compression.

[0081] Optionally, referring to Figures 1-2 , the material compression ratio adjustment structure 14 includes a limit block 141;

[0082] The limit block 141 is located between the laterally extending plate 102 and the lower base 11;

[0083] The second locking structure 132 is used to make the height of the test material accommodation position 12 have a preset relationship with the height of the limit block 141, and the preset relationship includes any one of the following: the two are equal and the difference between the two is a preset value.

[0084] In this embodiment, the limit block is located between the upper and lower bases. When the second locking structure locks and connects the upper and lower bases, the height of the test material accommodation position formed between the upper and lower bases is limited by the limit block. The following are some specific embodiments for understanding the above preset relationship.

[0085] When the opposite surfaces of the upper and lower bases approaching each other are both flat (that is, the opposite surfaces of the laterally extending plate and the lower base approaching each other are flat, and the same applies hereinafter), the height of the test material accommodation position formed after the upper and lower bases are locked is limited to the height of the limit block (that is, the preset relationship is that the two are equal). For example, when the original height of the measurement sample is 10 cm, no compression can be achieved by selecting a 10 cm limit block, a 25% compression ratio can be achieved by selecting a 7.5 cm limit block, a 50% compression ratio can be achieved by selecting a 5 cm limit block, and a 75% compression ratio can be achieved by selecting a 2.5 cm limit block.

[0086] When there are grooves at the positions corresponding to the limiting blocks on the opposite surfaces of the upper and lower bases that are close to each other, the height of the accommodation position for the material to be measured formed after the upper and lower bases are locked is limited to the height of the limiting block minus the depths of the grooves on both sides (that is, the preset relationship is that the difference between the two is a preset value, and the preset value is the sum of the depths of the grooves on both sides). In this case, the grooves on both sides can play a role in positioning the limiting block, avoiding the displacement or change in the installation posture of the limiting block, and improving the stability during the measurement process.

[0087] When there are protrusions at the positions corresponding to the limiting blocks on the opposite surfaces of the upper and lower bases that are close to each other, the height of the accommodation position for the material to be measured formed after the upper and lower bases are locked is limited to the height of the limiting block plus the heights of the protrusions on both sides (that is, the preset relationship is that the difference between the two is a preset value, and the preset value is the sum of the heights of the protrusions on both sides). In this case, the protrusions on both sides can also play a role in positioning the limiting block.

[0088] When there are a groove and a protrusion at the positions corresponding to the limiting blocks on the opposite surfaces of the upper and lower bases that are close to each other, the height of the accommodation position for the material to be measured formed after the upper and lower bases are locked is limited to the height of the limiting block plus the height of the protrusion minus the depth of the groove (that is, the preset relationship is that the difference between the two is a preset value, and the preset value is the height of the protrusion minus the depth of the groove). In this case, the protrusion and the groove can also play a role in positioning the limiting block, improving the stability during the measurement process.

[0089] The above are only examples. In actual applications, the implementation structure of the above preset relationship can also be adjusted according to specific requirements.

[0090] Optionally, the material compression rate adjustment structure 14 includes a plurality of limiting blocks 141 with different heights; or, the material compression rate adjustment structure 14 includes a limiting block 141 with adjustable height.

[0091] That is to say, a plurality of limiting blocks with different heights can be configured for the device. When measuring the sealing performance of the sample at different compression rates, different heights of limiting blocks are selected for limiting according to the required compression rate. Or, a limiting block with adjustable height is directly configured for the device. When measuring the sealing performance of the sample at different compression rates, the height of the limiting block is adjusted to the required height according to the required compression rate.

[0092] Optionally, the limiting block with adjustable height can be a hydraulic or pneumatic limiting block, and its structure can refer to the hydraulic rod or pneumatic rod in the related technology. By changing the hydraulic or pneumatic level, different heights can be achieved. At this time, a controller can also be set to control the height of the limiting block. For example, the controller receives the selection of different heights (or the selection of different compression rates) input by the user, adjusts the height of the limiting block according to the user input, and thus realizes different compression rates.

[0093] Optionally, the height-adjustable limit block can be realized by the cooperation of two sub-limit blocks. As Figure 8 shown, the height-adjustable limit block includes a first sub-limit block 1411, a second sub-limit block 1412, and a fixed connecting member 1413. The first sub-limit block 1411 has a plurality of first fixing holes 14111 in the height direction, the second sub-limit block 1412 has a second fixing hole 14121, and the fixed connecting member 1413 passes through a first fixing hole 14111 and is tightened in the second fixing hole 14121. By changing the first fixing hole through which the fixed connecting member passes, the second sub-limit block can be fixed at different heights on the first sub-limit block, thereby enabling the overall limit block to achieve different heights. The first sub-limit block 1411 can be a concave structure as Figure 8 shown, and the second sub-limit block 1412 is located inside the concave structure. The side wall of the concave structure can have more than one group of first fixing holes. For example, in the cross-sectional view as Figure 8 shown, the groove walls of the concave structure are provided with a group of first fixing holes in at least two orientations respectively.

[0094] Optionally, the height-adjustable limit block has at least four height levels, namely equal to the original height of the measured sample, equal to 75% of the original height of the measured sample, equal to 50% of the original height of the measured sample, and equal to 25% of the original height of the measured sample. In this way, the sealing performance of the measured sample can be measured at no compression, 25% compression rate, 50% compression rate, and 75% compression rate respectively.

[0095] Optionally, when the material compression rate adjustment structure 14 includes a plurality of limit blocks 141 with different heights, the heights of the plurality of limit blocks with different heights at least include: equal to the original height of the measured sample, equal to 75% of the original height of the measured sample, equal to 50% of the original height of the measured sample, and equal to 25% of the original height of the measured sample.

[0096] Optionally, referring to Figures 1-5 , the upper base 10 and the lower base 11 of the device can generally be circular. Of course, the shapes of the upper base and the lower base can also be adjusted according to requirements.

[0097] Optionally, referring to Figure 2 , the test liquid tank of the upper base 10 of the device surrounds the water permeable hole 111 on the lower base 11 in the orthographic projection of the lower base 11. Since the liquid in the test liquid tank has a tendency to flow downward under the action of gravity, leakage is more likely to occur in the part of the measured sample below the test liquid tank. By arranging the water permeable hole directly below the test liquid tank, it can ensure that the leaked liquid flows out in time and avoid affecting the test accuracy.

[0098] Optionally, referring to Figures 3-5, the upper base 10 and the lower base 11 of the device each have the same number of mounting holes (i.e., the first locking structure 131, such as four mounting holes located at the edge position and evenly spaced), and the number of the second locking structures 132 is equal to the number of mounting holes on the upper base 10 or the lower base 11. Each second locking structure 132 is sequentially tightened into one mounting hole of the upper base 10 and one mounting hole of the lower base 11.

[0099] Optionally, the second locking structure 132 is a combination of a nut and a screw (or a bolt). After the screw (or the bolt) passes through the mounting holes of the upper and lower bases, it is tightened by the nut.

[0100] Optionally, referring to Figures 1-2 , the limiting block can be annular, and the second locking structure also passes through the limiting block. Or, when the number of limiting blocks is multiple, the multiple limiting blocks are arranged around the second locking structure. In this way, the height of the test material accommodating position can be controlled more precisely.

[0101] Optionally, referring to Figures 1-2 , the liquid level scale area 1011 on the side wall of the test liquid tank 101 of the upper base 10 has scales that gradually increase from top to bottom, with the unit being milliliters or liters. For example, the scale can be 0 - 500 milliliters. In this way, when subsequent sample performance testing is required, the initial liquid level of the test liquid can be directly controlled at the 0 scale, and then the liquid level of the test liquid is read after a preset time. Then, the read liquid level of the test liquid is equal to the amount of the exuded liquid (provided that the liquid level of the test liquid does not drop below the maximum scale). Based on the amount of the exuded liquid and the preset time, the corresponding penetration rate can be calculated. When the liquid level of the test liquid is below the maximum scale after the preset time, it is necessary to measure the time for the liquid level of the test liquid to gradually drop to the maximum scale, and calculate the penetration rate based on the amount of the exuded liquid corresponding to the difference between the maximum scale and the minimum scale and the measured time.

[0102] Optionally, referring to Figure 9 , the liquid level scale area 1011 on the side wall of the test liquid tank 101 of the upper base 10 has a first scale 10111, a second scale 10112, a first grade indication symbol P0, a second grade indication symbol P1, and a third grade indication symbol P2. The first scale 10111 is farther from the ground than the second scale 10112. The first grade indication symbol P0 is located on the side of the first scale 10111 away from the ground. The second grade indication symbol P1 is located between the first scale 10111 and the second scale 10112. The third grade indication symbol P2 is located on the side of the second scale 10112 close to the ground.

[0103] When judging the water sealing performance of the material to be tested, it is achieved by measuring the amount of liquid exuded by the material to be tested after a predetermined time (such as 60 minutes). When using the device of this embodiment for measurement, the initial liquid level of the test liquid can be set at the first scale 10111, and then wait for the preset time (such as 60 minutes); if after the preset time, the liquid level of the test liquid remains at the first scale 10111 (or basically at the first scale 10111) and no liquid seepage phenomenon is found on the outer surface of the device, the sealing grade of the measured sample can be directly read as the first grade P0, which means that the measured sample has excellent sealing performance and can meet the long-term waterproof grade requirements; if after the preset time, the liquid level of the test liquid is between the first scale 10111 and the second scale 10112 and a liquid seepage phenomenon is found on the outer surface of the device, the sealing grade of the measured sample can be directly read as the second grade P1, which means that the measured sample has certain sealing performance, but there is a certain amount of liquid seepage over time, and it can only meet the waterproof grade requirements for a short time; if after the preset time, the liquid level of the test liquid is below the second scale 10112, the sealing grade of the measured sample can be directly read as the third grade P2, which means that the measured sample has a large amount of liquid seepage, poor sealing performance, and it is expected that the sealing effect is difficult to achieve and cannot meet the waterproof grade requirements.

[0104] It can be seen that the above settings achieve a simple method for measuring the sealing performance grade, which is suitable for quickly selecting sealing materials.

[0105] When precise measurement of the sealing performance of each material to be tested is required (such as when the penetration rate of the material needs to be determined), it can be achieved by means of the gradually increasing scale from top to bottom described above. Or, when the sealing grade of the test sample is determined to be the second grade P1 or the third grade P2, the precise sealing penetration rate can be further determined by means of the gradually increasing scale from top to bottom described above. Among them, the calculation formula for the penetration rate is as follows:

[0106] P = 60×(V / T);

[0107] Among them, P represents the penetration rate, and its unit can be milliliters per minute (mL / min); V represents the penetration volume, and the unit is milliliters (mL); T represents the penetration time, and the unit is seconds (s).

[0108] The above penetration volume can be obtained by reading through the above scale, and the penetration time can be obtained by timing with a timer.

[0109] It should be noted that the aforementioned first scale 10111 and second scale 10112 can also be reused as the minimum scale and maximum scale of the gradually increasing scale from top to bottom described above.

[0110] Optionally, the device in this embodiment further has a timer. A preset time can be set through this timer to issue a prompt to remind the user to read the penetration volume of the test liquid.

[0111] The foregoing embodiments mainly focus on how to enable the user to quickly read the sealing performance parameters of the material to be tested. In some embodiments, the determination of the material to be tested can be automated.

[0112] Optionally, the device in this embodiment further has a controller, a liquid level acquisition component, a timer, a liquid storage tank, and a water pump. The controller is used to control the water pump to extract the test liquid in the liquid storage tank and inject it into the test liquid tank, control the liquid level acquisition component to record the first test liquid level, and control the timer to start counting down (such as issuing a prompt signal after a preset time); the controller is also used to control the liquid level acquisition component to record the second test liquid level when receiving the prompt signal issued by the timer; based on the first test liquid level, the second test liquid level, and the preset time, calculate the penetration rate and output it (the output can be realized through a display screen, for example).

[0113] Optionally, the liquid level acquisition component can include a liquid level sensor, an image sensor, etc. The liquid level sensor can directly acquire the test liquid level. The image sensor acquires the test liquid level by recording an image and analyzing the image.

[0114] Optionally, the device further has a pretreatment chamber, which is equipped with heating devices, temperature sensors, humidifying devices, humidity sensors, oxygen-increasing devices, oxygen concentration sensors, etc. The sample to be measured can be pre-treated in advance (placing the sample to be measured under preset conditions for a preset duration), such as thermal-oxidative aging, damp-heat aging, or high-low temperature cycling, etc. After the pretreatment is completed, the sealing performance is measured to obtain the change in the sealing performance of the sample to be measured under various environmental durability working conditions. Among them, thermal-oxidative aging can be achieved by adjusting the temperature and oxygen concentration in the pretreatment chamber to preset values and placing the sample to be measured in the pretreatment chamber for a preset time. Damp-heat aging can be achieved by adjusting the humidity and oxygen concentration in the pretreatment chamber to preset values and placing the sample to be measured in the pretreatment chamber for a preset time. High-low temperature cycling can be achieved by placing the sample to be measured in the pretreatment chamber for a preset time and repeatedly switching the temperature in the pretreatment chamber between high and low temperatures during this period.

[0115] In summary, the embodiments of the present disclosure provide a device for measuring the sealing performance of materials, which can perform simple and rapid grading of the sealing performance of the material to be tested, or measure the accurate penetration rate of the material to be tested, can take into account different application scenarios and different working conditions of the material to be tested, obtain more accurate and comprehensive sealing performance parameters of the material to be tested, and is conducive to accelerating the testing and development work of sealing materials.

[0116] In a second aspect, the present disclosure provides a method for measuring the sealing performance of a material, which can be implemented with the aid of the aforementioned device. Figure 10 , the method comprises the following steps.

[0117] Step 801: Prepare a test sample 15 of the material to be tested.

[0118] In this step, the material to be tested can be cut or trimmed to obtain a test sample of the target size. The target size can be adjusted according to the needs. For example, when the axial sealing performance of the material to be tested needs to be tested, the test sample can be prepared as the aforementioned block test sample 151; when the radial sealing performance of the material to be tested needs to be tested, the test sample can be prepared as the aforementioned ring test sample 152. For example, the above-mentioned test sample can be obtained by cutting a sample of the material to be tested with a thickness of 10 cm.

[0119] Optionally, step 801 further includes: pre-treating the material to be tested (or the sample to be measured), wherein the pre-treating includes placing the material to be tested (or the sample to be measured) under preset conditions for a preset time, wherein the preset conditions include at least one of the following or a combination thereof: preset temperature, preset humidity, preset oxygen concentration, and preset temperature alternation. Specifically, the above pre-treating may include thermal oxygen aging, wet heat aging, or high and low temperature alternation. The specific implementation of the above process may refer to the relevant description in the aforementioned device embodiment, which will not be repeated here.

[0120] Step 802: Place the test sample 15 in the material receiving position 12 of the device as described above.

[0121] In this step, the measurement sample is placed in the material receiving position to be measured, and the upper and lower substrates of the device can first form the material receiving position to be measured, and then the measurement sample is placed, or the measurement sample is first placed at a predetermined position of the lower substrate, and then the upper and lower substrates are connected to form a completed material receiving position to be measured. The specific selection can be made according to actual needs.

[0122] Step 803: injecting the test liquid into the test liquid tank 101 of the upper substrate 10 of the device.

[0123] In this step, the user may directly inject the test liquid into the test liquid tank, or as described in the above embodiment, the controller may control the water pump to extract the test liquid in the liquid storage tank and inject it into the test liquid tank.

[0124] When the side wall of the test liquid tank 101 has scales that gradually increase from top to bottom and the minimum scale is 0, step 803 may include: injecting the test liquid and adjusting the liquid level to zero.

[0125] Step 804: Through the liquid level scale area 1011 on the side wall of the test liquid tank 101, read the change in the liquid level of the test liquid in the test liquid tank 101 after the test sample 15 has been immersed for a preset time.

[0126] In this step, since the liquid level scale area is transparent, the user can directly read the change in the liquid level of the test liquid through the liquid level scale area. Alternatively, as described in the aforementioned device embodiment, the reading here can also be automatically performed by the device.

[0127] Optionally, before step 804, the method further includes: making the injected test liquid fully contact with the test sample to ensure that there is no residual air bubble, fully immersing for the preset time, where the preset time can be 1 hour; then adjusting the liquid level to the minimum scale (such as the 0 scale), and then performing the reading in step 804.

[0128] Optionally, step 804 further includes:

[0129] When after the preset time, the change in the liquid level of the test liquid is basically 0 (i.e., the liquid level is still basically at the minimum scale) and no liquid seepage is found on the outer surface of the device, record the sealing grade of the test sample as the first grade;

[0130] When after the preset time, the liquid level of the test liquid is between the minimum scale and the maximum scale, and there is liquid seepage on the outer surface of the device, record the sealing grade of the test sample as the second grade; re-inject the test liquid to make the liquid level of the test liquid at the minimum scale, and record the scale corresponding to the liquid level after the preset time to obtain the change in the liquid level of the test liquid within the preset time;

[0131] When after the preset time, the liquid level of the test liquid is on the side closer to the ground than the maximum scale, record the sealing grade of the test sample as the third grade; re-inject the test liquid to make the liquid level of the test liquid at the minimum scale, start timing and record the time when the liquid level drops to the maximum scale, record this time, and take the difference between the maximum scale and the minimum scale as the change in the liquid level.

[0132] Step 805: Based on the change in the liquid level, determine the sealing performance of the test sample 15.

[0133] In this step, after obtaining the change in the liquid level, the liquid penetration amount can be correspondingly determined (when the scale is in milliliters or liters, the directly read change in the liquid level obtained is equal to the liquid penetration amount). Based on the liquid penetration amount and the preset time, the sealing performance of the test sample can be determined. Specifically, the sealing penetration rate corresponding to the material can be calculated as a parameter reflecting the sealing performance of the material. Among them, the calculation formula for the penetration rate is as follows:

[0134] P = 60×(V / T);

[0135] Among them, P represents the permeation rate, and its unit can be milliliter per minute (mL / min); V represents the permeation volume, and its unit is milliliter (mL); T represents the permeation time, and its unit is second (s).

[0136] Optionally, referring to the aforementioned device embodiment, the sealing level of the test sample can be simply determined based on the liquid level change, or the sealing penetration rate of the test sample can be accurately calculated. The sealing penetration rate is a simple measure of the sealing ability of the material, which can effectively evaluate the sealing performance of the material to be tested (such as foam).

[0137] In some embodiments, when the axial sealing performance of the material to be tested needs to be tested, step 801 includes: preparing a block-shaped test sample 151 of the material to be tested. Figure 2 The lower base 11 of the device has a water-permeable hole 111 connected to the material receiving position 12 to be tested. Figure 2 In this way, if the material to be tested leaks liquid, the leaked liquid can flow out quickly and will not affect the accuracy of the sealing performance test. The block-shaped test sample needs to completely cover the lower end opening of the test liquid tank to ensure that the test liquid can only penetrate downward from the upper surface of the block-shaped test sample, thereby improving the accuracy of the test. At the same time, the water-permeable hole of the lower substrate needs to face the lower end of the test liquid tank to ensure that the leaked water can be quickly discharged.

[0138] Alternatively, when it is necessary to measure the radial sealing performance of the material to be measured, step 801 includes: preparing an annular measurement sample 152 of the material to be measured. Figure 1 As shown, the lower base 11 of the device is a water-blocking structure. In this way, the liquid can only seep out through the radial side wall of the material to be tested, which can better measure the radial sealing performance. Among them, the inner diameter of the annular test sample 152 here needs to be equal to or greater than the inner diameter of the test liquid tank, and the center of the central through hole of the annular test sample is aligned with the center of the test liquid tank to ensure that the test liquid can only seep out from the radial direction of the annular test sample, thereby improving the accuracy of the measurement.

[0139] In some embodiments, as described in the aforementioned device embodiments, the device further includes a second locking structure 132 and a material compression rate adjustment structure 14;

[0140] refer to Figure 11 After step 802, the method further includes:

[0141] Step 806 : Control the height of the test material accommodation position 12 to be less than or equal to the original height of the test sample 15 through the material compression rate adjustment structure 14 and the second locking structure 132 .

[0142] Based on the above settings, it is possible to measure the sealing performance of the material to be tested at different compression ratios, which is beneficial to a more comprehensive analysis of the sealing performance of the material to be tested.

[0143] Optionally, for the solution where the device is equipped with limit blocks of multiple different heights to implement the material compression ratio adjustment structure, the above step 806 includes: selecting the limit block with the corresponding height according to the required compression ratio. For example, for a measurement sample with an original height of 10 cm, a limit block with a height of 7.5 cm is selected for a 25% compression ratio, a limit block with a height of 5 cm is selected for a 50% compression ratio, and a limit block with a height of 2.5 cm is selected for a 75% compression ratio.

[0144] For the specific implementation of the above step 806, reference can be made to the foregoing device embodiment, which will not be elaborated here.

[0145] In summary, this embodiment provides a simple method for measuring the sealing performance of materials. Only by injecting the test liquid into the test liquid tank and observing the liquid level change of the test liquid after a preset time, the sealing performance of the material can be quickly obtained, which is beneficial to the rapid selection of sealing materials and reduces the testing and development time of sealing materials.

[0146] It should be noted that since the device has been described in detail, some content has been omitted in the description of the method embodiment. However, it can be understood that various details of the method embodiment can refer to the foregoing device embodiment.

[0147] In the present disclosure, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plurality" means two or more, unless otherwise clearly defined.

[0148] After considering the specification and practicing the present disclosure herein, those skilled in the art will readily think of other embodiments of the present disclosure. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only regarded as exemplary.

[0149] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A material sealing performance measuring device, characterized in that: It comprises an upper substrate (10) and two different lower substrates (11) which are used selectively, each of the lower substrates (11) being a plate-shaped structure; The upper substrate (10) is located above the lower substrate (11), and a material receiving position (12) to be tested is formed between the upper substrate (10) and the lower substrate (11); The upper substrate (10) has a test liquid tank (101), the test liquid tank (101) is connected to the to-be-tested material containing position (12), the side wall of the test liquid tank (101) has a transparent liquid level scale area (1011), the upper substrate (10) has a lateral extension plate (102) surrounding the test liquid tank (101) and extending radially outward from the side wall of the lower end of the test liquid tank (101), and at least a portion of the to-be-tested material containing position (12) is formed between the lateral extension plate (102) and the lower substrate (11); One of the two different and selectively used lower substrates (11) has a water permeable hole (111) connected to the test material receiving position (12), and is configured to measure the axial sealing performance of a block-shaped test sample, the block-shaped test sample is suitable for being received in the test material receiving position (12), and the diameter of the block-shaped test sample is larger than the inner diameter of the lower end of the test liquid tank (101); The other lower substrate (11) of the two different and selectively used lower substrates (11) is a water-blocking structure and is configured to measure the radial sealing performance of an annular measurement sample, wherein the annular measurement sample is suitable for being accommodated in the test material accommodation position (12), and the inner diameter of the annular measurement sample is equal to or greater than the inner diameter of the lower end of the test liquid tank (101).

2. The device according to claim 1, characterized in that The upper base (10) is detachably connected to the lower base (11).

3. The device according to claim 2, characterized in that The lateral extension plate (102) and the lower base (11) respectively have a first locking structure (131), and the device further comprises a second locking structure (132), wherein the first locking structure (131) cooperates with the second locking structure (132) to detachably connect the lateral extension plate (102) and the lower base (11).

4. The device according to claim 3, characterized in that The device further comprises a material compression rate adjustment structure (14), wherein the material compression rate adjustment structure (14) cooperates with the second locking structure (132) to make the height of the material receiving position (12) to be tested less than or equal to the original height of the test sample.

5. The device according to claim 4, characterized in that The material compression rate adjustment structure (14) comprises a limit block (141); The limiting block (141) is located between the lateral extension plate (102) and the lower base (11); The second locking structure (132) is used to make the height of the material receiving position (12) to be tested and the height of the limit block (141) form a preset relationship, wherein the preset relationship includes any one of the following: the two are equal and the difference between the two is a preset value.

6. The device according to claim 5, characterized in that The material compression rate adjustment structure (14) comprises a plurality of limit blocks (141) having different heights; or, the material compression rate adjustment structure (14) comprises a limit block (141) with adjustable height.

7. A method for measuring sealing performance of a material, characterized in that: The method comprises: Preparing a test sample of the material to be tested (15); Placing the measurement sample (15) in a material receiving position (12) for testing of the device according to any one of claims 1 to 6; Injecting a test liquid into the test liquid tank (101) of the upper base (10) of the device; Reading, through a liquid level scale area (1011) on the side wall of the test liquid tank (101), the amount of change in the liquid level of the test liquid in the test liquid tank (101) after the test sample (15) has been immersed for a preset time; Determining the sealing performance of the test sample (15) based on the amount of change in the liquid level; Wherein, the preparing of the measurement sample (15) of the material to be measured comprises: preparing a block-shaped measurement sample (151) of the material to be measured; the lower base body (11) of the device is selected to have a water-permeable hole (111) connected to the receiving position (12) of the material to be measured; or, The preparing of the measurement sample (15) of the material to be measured comprises: preparing a ring-shaped measurement sample (152) of the material to be measured; and the lower substrate (11) of the device is selected to be a lower substrate (11) formed into a water-blocking structure.

8. The method according to claim 7, characterized in that The lateral extension plate (102) and the lower base (11) respectively have a first locking structure (131), and the device further comprises a second locking structure (132), the first locking structure (131) and the second locking structure (132) cooperate to detachably connect the lateral extension plate (102) and the lower base (11); the device further comprises a material compression rate adjustment structure (14); After placing the test sample (15) in the test material receiving position (12), the method further comprises: Through the material compression rate adjustment structure (14) and the second locking structure (132), the height of the material receiving position (12) to be tested is controlled to be less than or equal to the original height of the test sample (15).

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