Device and method for measuring sealing performance of material

Abstract

The invention provides a device and method for measuring the sealing performance of a material, and belongs to the technical field of material performance measurement. The device comprises an upper base body and a lower base body; the upper base body is located above the lower base body, and a to-be-tested material accommodating position is formed between the upper base body and the lower base body; the upper base body is provided with a test liquid tank, the test liquid tank is communicated with the to-be-tested material accommodating position, and the side wall of the test liquid tank is provided with a transparent liquid level scale area. According to the invention, the sealing characteristic of the sealing material (such as foam) can be accurately and rapidly measured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of material performance measurement, and in particular to a material sealing performance measurement device and method. Background Art

[0002] In various products such as vehicles and electronic equipment, there is often a need to seal components. Sealing can be achieved by filling specific materials, such as foam, silicone, etc. When sealing by filling specific materials, since the sealing properties of different filling materials may be different, in order to select the appropriate sealing material, it is necessary to measure the sealing properties of the sealing material.

[0003] In the related art, a sealing material (such as foam) is generally formed into a U-shape and then clamped and fixed. A predetermined volume of test liquid is injected from the opening of the U-shape, and the leakage 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 properties. For different materials with seepage, the specific sealing properties of these materials cannot be accurately determined. Summary of the invention

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

[0006] Specifically, the following technical solutions are included: In a first aspect, a material sealing performance measuring device is provided, comprising an upper substrate and a lower substrate; The upper substrate is located above the lower substrate, and a receiving position for the material to be tested is formed between the upper substrate and the lower substrate; The upper substrate has a test liquid tank, the test liquid tank is connected to the to-be-tested material containing position, and the side wall of the test liquid tank has a transparent liquid level scale area.

[0007] Optionally, the lower substrate has a water-permeable hole connected to the accommodating position of the material to be tested; or, the lower substrate is a water-blocking structure.

[0008] Optionally, the upper base is detachably connected to the lower base.

[0009] Optionally, the upper substrate 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 of the lower end of the test liquid tank; the lower substrate is a plate-shaped structure; 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; 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.

[0010] 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.

[0011] Optionally, the material compression rate adjustment structure includes a limit block; The limiting block is located between the lateral extension plate and the lower base; 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.

[0012] 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.

[0013] In a second aspect, a method for determining sealing performance of a material is provided, the method comprising: Prepare the test samples of the materials to be tested; Placing the test sample in the material receiving position of the device as described above; injecting a test liquid into the test liquid tank of the upper substrate of the device; 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; Based on the amount of change in the liquid level, the sealing performance of the measurement sample is determined.

[0014] 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, 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.

[0015] 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 of the lower end of the test liquid tank; the lower base is a plate-shaped structure; the lateral extension plate and the lower base respectively have a first locking structure, and the device also includes a second locking structure, the first locking structure and the second locking structure cooperate to detachably connect the lateral extension plate to the lower base; at least part of the accommodating position for the material to be tested is formed between the lateral extension plate and the lower base; the device also includes a material compression rate adjustment structure compression rate adjustment structure; After placing the test sample in the test material receiving position, the method further comprises: Through the material compression rate adjustment structure and the second locking structure, the height of the accommodating position of the material to be tested is controlled to be less than or equal to the original height of the test sample.

[0016] The disclosed embodiments provide a material sealing performance measuring device and method, wherein a material receiving position to be measured is formed between the upper substrate and the lower substrate 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 material receiving position to be measured, and then the test liquid is injected into the test liquid tank of the upper substrate. Since the test liquid tank is connected to the material receiving position to be measured, the test liquid can flow to the measurement sample and immerse the measurement sample. The side wall of the test liquid tank also has a transparent liquid level scale area. With the help of the liquid level scale area, the liquid level change of the test liquid can be read, and then the water seepage of the measurement sample can be clearly, directly and quantitatively determined, and the sealing performance of the measurement sample can be quantified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the structure of a material sealing performance measuring device provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of the structure of another material sealing performance measuring device provided in an embodiment of the present disclosure; Figure 3 A top view of a lower substrate of a material sealing performance measuring device provided by an embodiment of the present disclosure; Figure 4 A top view of another lower substrate of the material sealing performance measuring device provided by an embodiment of the present disclosure; Figure 5A top view of an upper substrate of a material sealing performance measuring device provided by an embodiment of the present disclosure; Figure 6 A cross-sectional view (a) and a top view (b) of a ring-shaped measurement sample provided in an embodiment of the present disclosure; Figure 7 A cross-sectional view (a) and a top view (b) of a block-shaped measurement sample provided in an embodiment of the present disclosure; Figure 8 A schematic diagram of a compression rate adjustment structure provided in an embodiment of the present disclosure; Fig. 9 A partial structural schematic diagram of an upper substrate provided in an embodiment of the present disclosure; Fig.10 A flow chart of a method for measuring sealing performance of a material provided in an embodiment of the present disclosure; Fig.11 A flow chart of another method for determining the sealing performance of a material provided in an embodiment of the present disclosure.

[0019] The reference numerals in the figures represent respectively: 10-upper substrate; 101-test liquid tank; 1011-liquid level scale area; 10111-first scale; 10112-second scale; 102-lateral extension plate; 11-lower substrate; 111-water permeable hole; 12-accommodation position for the material to be tested; 131-first locking structure; 132-second locking structure; 14-material compression rate adjustment structure; 141-limiting block; 1411-first sub-limiting block; 14111-first fixing hole; 1412-second sub-limiting block; 14121-second fixing hole; 1413-fixing connector; 15- measurement sample; 151- block measurement sample; 152- ring measurement sample.

[0020] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0022] In the embodiments of the present disclosure, the "upper" refers to the side of the object that is relatively farther from the ground, and the "lower" refers to the side of the object that is relatively closer to the ground. Moreover, when describing relative relationships, the present disclosure is based on the device being in normal use.

[0023] Unless otherwise defined, all technical terms used in the embodiments of the present disclosure have the same meanings as commonly understood by those of ordinary skill in the art.

[0024] In order to make the technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0025] First, reference Figure 1-9 , an embodiment of the present disclosure provides a material sealing performance measuring device.

[0026] refer to Figure 1-2 , the material sealing performance measuring device comprises an upper substrate 10 and a lower substrate 11; The upper substrate 10 is located above the lower substrate 11, and a to-be-tested material receiving position 12 is formed between the upper substrate 10 and the lower substrate 11; The upper substrate 10 has a test liquid tank 101 , which is connected to the to-be-tested material containing position 12 , and a side wall of the test liquid tank 101 has a transparent liquid level scale area 1011 .

[0027] 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).

[0028] Optionally, the test liquid is water, such as distilled water. Alternatively, the test liquid is a colored liquid to facilitate liquid level reading.

[0029] In some embodiments, reference Figure 2 and4 , 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.

[0030] 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.

[0031] 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).

[0032] Optionally, refer to Figure 6-7 The block-shaped measurement sample 151 may be a sealing block with a diameter of 8 cm and a thickness of 10 cm; the ring-shaped measurement sample 152 may 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 initial parameters before compression and are only used as examples. They can be adaptively adjusted according to needs.

[0033] In the case where the radial side sealing performance needs to be measured (i.e., annular test samples), the inner diameter of the annular test sample must be equal to or larger 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 annular test sample. In the case where the axial side sealing performance needs to be measured (i.e., block test samples), the diameter of the block test sample must be larger 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 test sample.

[0034] It should be noted that the aforementioned sizes and shapes are only examples and can be adjusted according to actual needs.

[0035] In some embodiments, the device may be equipped in advance with the aforementioned two different lower substrates to meet the testing requirements in different situations. In other embodiments, the device may be equipped with a lower substrate with water-permeable holes and a mode switching component, and the mode switching component is used to block the water-permeable holes of the lower substrate to turn it into a water-blocking structure. The mode switching component may be a waterproof sheet or a waterproof film. When it is necessary to switch to a water-blocking structure, the waterproof sheet or waterproof film is attached to the surface of the lower substrate to block the water-permeable holes. The orthographic projection of the waterproof sheet or waterproof film on the lower substrate needs to cover the orthographic projection of the measurement sample on the lower substrate to avoid affecting the measurement accuracy.

[0036] In some embodiments, reference Figure 1-2 The upper base 10 and the lower base 11 are detachably connected.

[0037] By setting the upper substrate and the lower substrate to be detachably connected, it can be ensured that the device can be reused to measure different samples. In addition, the upper substrate and the lower substrate are detachable, which is also convenient for replacing different lower substrates to achieve the measurement of different types of samples.

[0038] In some embodiments, reference Figure 1-5 The upper substrate 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 substrate 11 is a plate-shaped structure; 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 cooperates with the second locking structure 132 to detachably connect the lateral extension plate 102 to the lower base 11; At least a portion of the to-be-tested material accommodation position 12 is formed between the lateral extension plate 102 and the lower base body 11 .

[0039] 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 extension direction of the test liquid tank. Optionally, the extension direction of the lateral extension plate may be perpendicular to the extension direction of the test liquid tank, and the lateral extension plate may be parallel to the horizontal plane when the device is in the use posture. The lower substrate may also be parallel to the horizontal plane when the device is in the use posture. When testing, liquid seeping from the test sample can overflow the device through the edge position of the lateral extension plate and the lower substrate. In this way, it can be ensured that the seeped liquid is discharged in time, thereby improving the accuracy of the test.

[0040] In this embodiment, reference Figure 1-5The upper substrate 10 is actually realized by connecting a cylindrical structure with a plate-like structure. The internal hollow channel of the cylindrical structure is formed as a test liquid tank. The plate-like structure (i.e., the lateral extension plate) has a connecting hole with an inner diameter equal to or close to that of the test liquid tank. The cylindrical structure is connected to the plate-like structure and the test liquid tank is aligned with the connecting hole to form the upper substrate 10. The lateral extension plate and the lower substrate are respectively provided with a first locking structure. The second locking structure cooperates with the first locking structure to realize the detachable connection between the lateral extension plate and the lower substrate, thereby realizing the detachable connection between the upper substrate and the lower substrate. At least part of the accommodating position of the material to be tested is formed between the lateral extension plate and the lower substrate, so that the measured sample can be at least partially located between the lateral extension plate and the lower substrate, making the test more accurate. The accommodating position of the material to be tested also includes at least a part between the lower end of the test liquid tank and the lower substrate, which is used to ensure that the test liquid can flow more smoothly into the accommodating position of the material to be tested to immerse the measured sample. The size of the test liquid tank can remain unchanged from top to bottom, or change gradually. This application does not limit this. It only needs to ensure that the outflow of the test liquid corresponds to the scale of the scale area.

[0041] With the aid of the locking structure, it can be ensured that the upper substrate and the lower substrate can be locked in a connected state and can be easily disassembled to replace the measurement sample.

[0042] Optional, reference Figure 1-5 The first locking structure 131 may be a connecting hole, and the second locking structure 132 may be a matching structure of a screw and a nut. In this way, by passing the screw through the connecting hole between the lateral extension plate and the lower base and tightening it with a nut, the upper base and the lower base can be detachably connected.

[0043] In another embodiment, the first locking structure 131 and the second locking structure 132 may also be implemented by a lock buckle or the like. The present application does not limit the specific implementation method thereof.

[0044] In some embodiments, reference Figure 1-2 The device also includes a material compression rate adjustment structure 14, which 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.

[0045] In this embodiment, the material compression rate adjustment structure cooperates with the second locking structure to control the height of the accommodating position of the material to be tested to be less than or equal to the original height of the material to be tested, thereby making the height of the measured sample uncompressed (when the height is equal to the original height) or compressed to a certain extent (when the height is less than the original height). In this way, the sealing performance of the measured sample under different compression rates can be measured, and more detailed sealing performance parameters of the measured sample can be obtained. It should be noted that the "original height" here refers to the height of the measured sample when it is not compressed.

[0046] Optional, reference Figure 1-2 , the material compression rate adjustment structure 14 includes 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, and the preset relationship includes any one of the following: the two are equal and the difference between the two is a preset value.

[0047] In this embodiment, the limit block is located between the upper and lower substrates, and when the second locking structure is locked and connected to the upper and lower substrates, the height of the material receiving position to be tested formed between the upper and lower substrates is limited by the limit block. The following are some specific embodiments to facilitate understanding of the above preset relationship.

[0048] When the opposing surfaces of the upper and lower substrates that are close to each other are both planes (that is, the opposing surfaces of the lateral extension plate and the lower substrate that are close to each other are planes, and the same applies below), the height of the material accommodation position formed after the upper and lower substrates 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 measured sample is 10cm, no compression can be achieved by selecting a 10cm limit block, a 25% compression rate can be achieved by selecting a 7.5cm limit block, a 50% compression rate can be achieved by selecting a 5cm limit block, and a 75% compression rate can be achieved by selecting a 2.5cm limit block.

[0049] When there are grooves on the opposite surfaces of the upper and lower substrates that are close to each other and at the positions corresponding to the limit blocks, the height of the material accommodation position to be measured formed after the upper and lower substrates are locked is limited to the height of the limit block minus the depth of the grooves on both sides (that is, the preset relationship is that the difference between the two is the 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 limit block, avoiding displacement of the limit block or changes in the installation posture, and improving stability during the measurement process.

[0050] When there are protrusions on the opposite surfaces of the upper and lower substrates that are close to each other and at the positions corresponding to the limit blocks, the height of the material receiving position to be tested formed after the upper and lower substrates are locked is limited to the height of the limit block plus the height of the protrusions on both sides (that is, the preset relationship is that the difference between the two is the 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 limit block.

[0051] When the upper and lower substrates have grooves and protrusions on the opposite surfaces close to each other at the positions corresponding to the limit blocks, the height of the material receiving position to be tested formed after the upper and lower substrates are locked is limited to the height of the limit 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 limit block, thereby improving the stability during the measurement process.

[0052] The above are only examples. In actual applications, the implementation structure of the above preset relationship can be adjusted according to specific needs.

[0053] Optionally, the material compression rate adjustment structure 14 includes a plurality of limit blocks 141 with different heights; or, the material compression rate adjustment structure 14 includes a limit block 141 with adjustable height.

[0054] That is, the device can be equipped with multiple stop blocks of different heights, and when measuring the sealing performance of samples under different compression rates, stop blocks of different heights can be selected for position limiting according to the required compression rate. Alternatively, the device can be directly equipped with a stop block with adjustable height, and when measuring the sealing performance of samples under different compression rates, the height of the stop block can be adjusted to the required height according to the required compression rate.

[0055] Optionally, the height-adjustable stopper may be a hydraulic or pneumatic stopper, and its structure may refer to the hydraulic rod or pneumatic rod in the related art, and different heights may be achieved by changing the hydraulic or pneumatic pressure level. In this case, a controller may also be provided to control the height of the stopper. For example, the controller receives a user input for a selection of different heights (or a selection of different compression rates), and adjusts the height of the stopper according to the user input, thereby achieving different compression rates.

[0056] Optionally, the height-adjustable limit block can be realized by the cooperation of two sub-limit blocks. Figure 8 As shown, the height-adjustable limit block includes a first sub-limit block 1411, a second sub-limit block 1412 and a fixed connection 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 connection 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 connection member passes, the second sub-limit block can be fixed at different heights of the first sub-limit block, thereby achieving different heights of the limit block as a whole. The first sub-limit block 1411 can be as follows Figure 8 The concave structure shown in FIG. 1 is a concave structure in which the second sub-limiting block 1412 is located. The side wall of the concave structure may have more than one set of first fixing holes, for example, Figure 8In the cross-sectional view shown, a group of first fixing holes are respectively arranged in at least two directions on the groove wall of the concave structure.

[0057] Optionally, the height-adjustable stopper has at least four height levels, namely, equal to the original height of the test sample, equal to 75% of the original height of the test sample, equal to 50% of the original height of the test sample, and equal to 25% of the original height of the test sample. In this way, the sealing performance of the test sample can be measured under no compression, 25% compression rate, 50% compression rate and 75% compression rate respectively.

[0058] Optionally, when the material compression rate adjustment structure 14 includes multiple limit blocks 141 with different heights, the heights of the multiple limit blocks with different heights include at least: equal to the original height of the measurement sample, equal to 75% of the original height of the measurement sample, equal to 50% of the original height of the measurement sample, and equal to 25% of the original height of the measurement sample.

[0059] Optional, reference Figure 1-5 The upper substrate 10 and the lower substrate 11 of the device can be generally circular. Of course, the shapes of the upper substrate and the lower substrate can also be adjusted according to needs.

[0060] Optional, reference Figure 2 The orthographic projection of the test liquid tank of the upper substrate 10 of the device on the lower substrate 11 surrounds the water permeable hole 111 on the lower substrate 11. Since the liquid in the test liquid tank tends to flow downward under the action of gravity, the part of the test sample below the test liquid tank is more likely to leak. By setting the water permeable hole directly below the test liquid tank, it can be ensured that the leaked liquid flows out in time to avoid affecting the test accuracy.

[0061] Optional, reference Figure 3-5 The upper base 10 and the lower base 11 of the device respectively have the same number of mounting holes (i.e., the first locking structures 131, such as four mounting holes located at the edge 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 screwed into one mounting hole of the upper base 10 and one mounting hole of the lower base 11 in sequence.

[0062] Optionally, the second locking structure 132 is a combination of a nut and a screw (or a screw), and the screw (or the screw) passes through the mounting holes of the upper and lower bases and is tightened by the nut.

[0063] Optional, reference Figure 1-2 The limit block may be annular, and the second locking structure also passes through the limit block. Alternatively, when there are multiple limit blocks, the multiple limit blocks are arranged around the second locking structure. In this way, the height of the accommodating position of the material to be tested can be controlled more accurately.

[0064] Optional, reference Figure 1-2 , the liquid level scale area 1011 on the side wall of the test liquid tank 101 of the upper substrate 10 has a scale that gradually increases from top to bottom, in milliliters or liters. For example, the scale can be 0-500 milliliters. In this way, when the performance of the sample needs to be tested later, the initial liquid level of the test liquid can be directly controlled at the 0 scale, and then the test liquid level can be read after a preset time. The read test liquid level is equal to the amount of liquid exuded (provided that the test liquid level is not lower than the maximum scale). Based on the amount of liquid exuded and the preset time, the corresponding penetration rate can be calculated. When the test liquid level is lower than the maximum scale after the preset time, it is necessary to measure the time for the test liquid level to gradually decrease to the maximum scale, and calculate the penetration rate based on the amount of exudate corresponding to the difference between the maximum scale and the minimum scale and the measured time.

[0065] Optional, reference Fig. 9 The liquid level scale area 1011 on the side wall of the test liquid tank 101 of the upper substrate 10 has a first scale 10111, a second scale 10112, a first level indicator P0, a second level indicator P1 and a third level indicator P2. The first scale 10111 is farther away from the ground than the second scale 10112. The first level indicator P0 is located on the side of the first scale 10111 away from the ground, the second level indicator P1 is located between the first scale 10111 and the second scale 10112, and the third level indicator P2 is located on the side of the second scale 10112 close to the ground.

[0066] When judging the sealing performance of the material to be tested against water, it is achieved by measuring the amount of liquid that seeps out of 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 a preset time (such as 60 minutes); if after the preset time, the liquid level of the test liquid is still maintained at the first scale 10111 (or basically at the first scale 10111) and no liquid seepage is found on the outer surface of the device, then the sealing level of the test sample can be directly read as the first level P0, which means that the test sample has excellent sealing performance and can meet the long-term waterproof level requirements; if after the preset time, the liquid level of the test liquid is at the first scale If the test liquid level is between 10111 and the second scale 10112 and liquid seepage is found on the outer surface of the equipment, the sealing level of the test sample can be directly read as the second level P1, which means that the test sample has a certain sealing performance, but there is a certain amount of liquid seepage over time, and it can only meet the waterproof level requirement for a short time; if after the preset time, the liquid level of the test liquid is below the second scale 10112, the sealing level of the test sample can be directly read as the third level P2, which means that the test sample has a large amount of liquid seepage and the sealing performance is poor. It is expected that it will be difficult to achieve a sealing effect and cannot meet the waterproof level requirement.

[0067] It can be seen that the above arrangement realizes a simple method for determining the sealing performance level, which is suitable for rapid selection of sealing materials.

[0068] When it is necessary to accurately measure the sealing performance of each material to be tested (such as when it is necessary to determine the permeation rate of the material), it can be achieved with the help of the aforementioned scale that gradually increases from top to bottom. Or, when it is determined that the sealing level of the test sample is the second level P1 or the third level P2, the precise sealing permeation rate can be further determined with the help of the aforementioned scale that gradually increases from top to bottom. The calculation formula of the permeation rate is as follows: P = 60 × (V / T); 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).

[0069] The above-mentioned permeation volume can be obtained by reading the above-mentioned scale, and the permeation time can be obtained by timing with a timer.

[0070] It should be noted that the first scale 10111 and the second scale 10112 may also be reused as the minimum value scale and the maximum value scale of the aforementioned scale that gradually increases from top to bottom.

[0071] Optionally, the device of this embodiment further has a timer, which can be used to send a prompt after a preset time to remind the user to read the permeation volume of the test liquid.

[0072] The above embodiments mainly focus on how to enable a 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.

[0073] Optionally, the device of this embodiment further comprises 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 countdown (such as sending 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 sent by the timer; based on the first test liquid level and the second test liquid level and the preset time, the permeation rate is calculated and output (the output can be realized through a display screen, for example).

[0074] Optionally, the liquid level acquisition component may include a liquid level sensor, an image sensor, etc. The liquid level sensor may directly acquire the liquid level of the test liquid. The image sensor acquires the liquid level of the test liquid by recording and analyzing an image.

[0075] Optionally, the equipment also has a pretreatment chamber, which has a heating device, a temperature sensor, a humidifying device, a humidity sensor, an oxygenation device, an oxygen concentration sensor, etc. The test sample can be pretreated in advance (the test sample is placed under preset conditions for a preset time), such as thermal oxygen aging, wet heat aging, or high and low temperature alternation, etc. After the pretreatment, the sealing performance is measured to obtain the changes in the sealing performance of the test sample under various environmental durability conditions. Among them, thermal oxygen aging can be achieved by adjusting the temperature and oxygen concentration in the pretreatment chamber to preset values, and placing the test sample in the pretreatment chamber for a preset time. Wet heat aging can be achieved by adjusting the humidity and oxygen concentration in the pretreatment chamber to preset values, and placing the test sample in the pretreatment chamber for a preset time. High and low temperature alternation can be achieved by placing the test sample in the pretreatment chamber for a preset time, and repeatedly switching the temperature in the pretreatment chamber between high temperature and low temperature during this period.

[0076] In summary, the embodiments of the present disclosure provide a material sealing performance measuring device, which can perform a simple and rapid grade measurement of the sealing performance of the material to be tested, or measure the precise permeation rate of the material to be tested. It can take into account different application scenarios and different usage conditions of the material to be tested, and obtain more accurate and comprehensive sealing performance parameters of the material to be tested, which is conducive to accelerating the testing and development of sealing materials.

[0077] 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. Fig.10 , the method comprises the following steps.

[0078] Step 801: Prepare a test sample 15 of the material to be tested.

[0079] 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.

[0080] 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.

[0081] Step 802: Place the test sample 15 in the material receiving position 12 of the device as described above.

[0082] 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.

[0083] Step 803: injecting the test liquid into the test liquid tank 101 of the upper substrate 10 of the device.

[0084] 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.

[0085] 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.

[0086] Step 804 : reading the liquid level change of the test liquid in the test liquid tank 101 after the measurement sample 15 has been immersed for a preset time through the liquid level scale area 1011 on the side wall of the test liquid tank 101 .

[0087] In this step, since the liquid level scale area is transparent, the user can directly read the liquid level change of the test liquid through the liquid level scale area. Alternatively, as described in the above device embodiment, the reading here can also be performed automatically by the device.

[0088] Optionally, before step 804, the method further includes: allowing the injected test liquid to fully contact the test sample to ensure that no bubbles remain, and fully immersing for a preset time, where the preset time can be 1 hour; then adjusting the liquid level to the minimum scale (such as 0 scale), and then reading step 804.

[0089] Optionally, step 804 further includes: When the liquid level change of the test liquid is basically 0 (i.e. the liquid level is still basically at the minimum scale) after the preset time, and no liquid seepage is found on the outer surface of the equipment, the sealing level of the test sample is recorded as the first level; When the liquid level of the test liquid is between the minimum scale and the maximum scale after the preset time, and there is liquid seepage on the outer surface of the equipment, the sealing level of the test sample is recorded as the second level; the test liquid is re-injected so that the liquid level of the test liquid is at the minimum scale, and the scale corresponding to the liquid level after the preset time is recorded to obtain the liquid level change of the test liquid within the preset time; When the preset time has passed and the liquid level of the test liquid is on the side of the maximum scale closer to the ground, the sealing grade of the test sample is recorded as the third grade. Re-inject the test liquid so that the liquid level is at the minimum scale, start timing and record the time it takes for the liquid surface to drop to the maximum scale. Record the time and take the difference between the maximum scale and the minimum scale as the liquid level change.

[0090] Step 805: Determine the sealing performance of the test sample 15 based on the liquid level change.

[0091] In this step, after obtaining the liquid level change, the liquid penetration amount can be determined accordingly (when the scale is milliliters or liters, the liquid level change directly read is equal to the liquid penetration amount). Based on the liquid penetration amount and the preset time, the sealing performance of the measured sample can be determined. Specifically, the sealing penetration rate corresponding to the material can be calculated as a parameter for the sealing performance of the reaction material. The calculation formula of the penetration rate is as follows: P = 60 × (V / T); 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).

[0092] 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).

[0093] 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.

[0094] 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 1As 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.

[0095] 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; refer to Fig.11 After step 802, the method further includes: 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 .

[0096] Based on the above settings, it is possible to measure the sealing performance of the material to be tested at different compression rates, which is conducive to a more comprehensive analysis of the sealing performance of the material to be tested.

[0097] Optionally, for a solution in which the device is equipped with a plurality of stoppers of different heights to realize the material compression rate adjustment structure, the above step 806 includes: selecting a stopper of a corresponding height according to the required compression rate. For example, for a measurement sample with an original height of 10 cm, a stopper of 7.5 cm in height is selected for a compression rate of 25%, a stopper of 5 cm in height is selected for a compression rate of 50%, and a stopper of 2.5 cm in height is selected for a compression rate of 75%.

[0098] For the specific implementation of the above step 806, reference may be made to the aforementioned device embodiment, which will not be described in detail here.

[0099] In summary, this embodiment provides a simple method for measuring the sealing performance of materials. It only requires injecting test liquid into the test liquid tank and observing the liquid level change of the test liquid after a preset time, so as to quickly obtain the sealing performance of the material, which is conducive to the rapid selection of sealing materials and reduces the testing and development time of sealing materials.

[0100] It should be noted that, since the device has been described in relatively detail, some contents have been omitted when describing the method embodiment, but it can be understood that various details of the method embodiment can refer to the aforementioned device embodiment.

[0101] In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

[0102] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only.

[0103] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A material sealing performance measuring device, characterized in that: It comprises an upper substrate (10) and a lower substrate (11); 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), and the side wall of the test liquid tank (101) has a transparent liquid level scale area (1011).

2. The device according to claim 1, characterized in that The lower substrate (11) has a water-permeable hole (111) communicating with the test material receiving position (12); or the lower substrate (11) is a water-blocking structure.

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

4. The device according to claim 3, characterized in that The upper substrate (10) has a lateral extension plate (102) connected to the side wall of the test liquid tank (101), 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 substrate (11) is a plate-shaped structure; 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) cooperating to detachably connect the lateral extension plate (102) and the lower base (11); At least a portion of the to-be-tested material accommodation position (12) is formed between the lateral extension plate (102) and the lower base body (11).

5. The device according to claim 4, 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.

6. The device according to claim 5, 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.

7. The device according to claim 6, 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.

8. A method for measuring the 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 7; 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; Based on the amount of change in the liquid level, the sealing performance of the test sample (15) is determined.

9. The method according to claim 8, characterized in that The method of preparing a 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 has a water-permeable hole (111) connected to the material to be measured accommodation position (12); 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; the lower base (11) of the device is a water-blocking structure.

10. The method according to any one of claims 8 to 9, characterized in that: The upper base (10) has a lateral extension plate (102) connected to the side wall of the test liquid tank (101), 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) of the device is a plate-shaped structure; the lateral extension plate (102) and the lower base (11) respectively have a first locking structure (131), the device also 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); at least part of the to-be-tested material accommodation position (12) is formed between the lateral extension plate (102) and the lower base (11); the device also includes 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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