Tension testing device

Abstract

The tensile force testing device comprises a sealing box, a first clamp, a second clamp and a tensile force testing piece, the sealing box comprises a wall part defining a sealing cavity, the first clamp and the second clamp are both arranged in the sealing cavity, the second clamp is movably arranged in the first direction, and the tensile force testing piece is arranged in the sealing cavity. The first direction is the direction in which the second clamp is close to or far away from the first clamp, so that the sample can be pulled until the sample is broken by respectively clamping the sample through the first clamp and the second clamp and moving the second clamp towards one side far away from the first clamp along the first direction, and in the process, at least part of the tension test piece is arranged in the sealing box; the tensile force applied to the sample can be detected, the tensile property of the sample is further analyzed, and meanwhile, the adjusting opening is formed in the wall part of the sealing box and is used for adjusting the environment in the sealing cavity, so that the sample can be tested in different environments, the tensile property of the sample in different environments is compared and analyzed, and the test reliability is improved.

Description

Technical Field

[0001] The present application belongs to the field of testing technology, and in particular relates to a tensile testing device. Background Art

[0002] Medical sheaths, medical catheters and other invasive medical devices usually need to be sampled and inspected before use. The tensile test is performed on the samples to test their tensile properties to ensure quality. Interventional medical devices need to be used in patients and usually work in at least two different environments. The test environment of existing tensile testing devices is relatively single and cannot test samples in different environments, resulting in low test reliability. Utility Model Content

[0003] The embodiment of the present application provides a tensile testing device that can test samples in different environments and improve the reliability of the test.

[0004] In a first aspect, an embodiment of the present application provides a tensile testing device, comprising a sealed box, a clamping piece and a tensile testing piece, the sealed box comprising a wall portion enclosing a sealed cavity, the wall portion being provided with an adjustment port for adjusting the environment within the sealed cavity; the clamping piece is disposed in the sealed cavity, and comprises a first clamp and a second clamp respectively used to clamp the sample, the second clamp being movably disposed along a first direction; at least a portion of the tensile testing piece is disposed in the sealed cavity, for detecting the tensile force exerted on the sample; the first direction is the direction in which the second clamp approaches or moves away from the first clamp.

[0005] In some embodiments, the tensile testing device further includes at least one of a vacuuming mechanism, a gas injection mechanism, and a liquid injection mechanism, and at least one of the vacuuming mechanism, the gas injection mechanism, and the liquid injection mechanism is connected to the regulating port.

[0006] In some embodiments, at least one of the first clamp and the second clamp includes a base and a first clamp block and a second clamp block disposed on the base, the first clamp block and the second clamp block are spaced apart along a second direction, and the second clamp block is movably disposed along the second direction, and the second direction is intersected with the first direction.

[0007] In some embodiments, at least one of the first clamp and the second clamp further includes an adjustment handle, the adjustment handle extends along the second direction and is connected to the second clamp block, and the adjustment handle is threadedly connected to the base.

[0008] In some embodiments, the base forms a limiting groove, which includes a bottom wall and side walls arranged on opposite sides of the bottom wall along a first direction. The second clamp is clamped in the limiting groove and slidably arranged relative to the limiting groove along a second direction, wherein the second clamp is respectively abutted against the side walls on both sides of the first direction.

[0009] In some embodiments, the second clamping block has a clamping surface on one side facing the first clamping block, and the clamping surface is formed with a slot extending along at least one of the first direction and the third direction, the slot is used to clamp the sample, and the third direction is perpendicular to the first direction.

[0010] In some embodiments, at least one of the first clamp and the second clamp further includes an auxiliary clamping portion, the auxiliary clamping portion includes a first clamping component and a second clamping component, the first clamping component is detachably disposed on the first clamping block, and the second clamping component is detachably disposed on the second clamping block.

[0011] In some embodiments, the tensile test piece includes a pull rod and a tensile gauge, the pull rod passes through the wall along a first direction, wherein part of the pull rod is located in the sealed cavity and connected to the second clamp, and the rest of the pull rod is located outside the sealed box and connected to the tensile gauge, and the tensile gauge pulls the second clamp to move along the first direction through the pull rod.

[0012] In some embodiments, the tensile testing device also includes a seal arranged on the wall, the seal includes a sealing group and a fastener, the sealing group includes an elastic sealing pad and a compression pad stacked along a first direction, the compression pad is located on the side of the elastic sealing pad away from the wall along the first direction, the fastener passes through the compression pad, the elastic sealing pad and the wall respectively to lock the compression pad and the elastic sealing pad to the wall, and the pull rod passes through the compression pad, the elastic sealing pad and the wall respectively along the first direction.

[0013] In some embodiments, the tensile testing device also includes a guide member arranged in the sealed cavity, the guide member includes a slide rail and a slider arranged on the slide rail, the slider is slidably arranged along a first direction relative to the slide rail, the slider is connected to the second clamp, and a plurality of scale lines are arranged on the slide rail, and the plurality of scale lines are spaced apart along the first direction.

[0014] The tensile testing device provided in this embodiment includes a sealed box, a first clamp, a second clamp and a tensile testing piece. The sealed box includes a wall portion that encloses a sealed cavity. The first clamp and the second clamp are both arranged in the sealed cavity. The second clamp is movably arranged along a first direction. The first direction is the direction in which the second clamp approaches or moves away from the first clamp. Therefore, by clamping the sample by the first clamp and the second clamp respectively, and moving the second clamp along the first direction toward a side away from the first clamp, the sample can be pulled until the sample is broken. In this process, at least a part of the tensile testing piece is arranged in the sealed box, which can detect the tensile force exerted on the sample, and then analyze and obtain the tensile properties of the sample. At the same time, since an adjustment port is provided on the wall portion of the sealed box for adjusting the environment in the sealed cavity, the sample can be tested in different environments to compare and analyze the tensile properties of the sample in different environments, thereby improving the reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 A schematic diagram of the structure of a tensile testing device provided in some embodiments of the present application;

[0017] Figure 2 is a partial top view of a tensile testing device provided in some embodiments of the present application;

[0018] Figure 3 is a partial side view of a tensile testing device provided in some embodiments of the present application;

[0019] Figure 4 is a schematic structural diagram of a first clamp and / or a second clamp provided in some embodiments of the present application;

[0020] Figure 5 is another structural schematic diagram of the first clamp and / or the second clamp provided in some embodiments of the present application;

[0021] Figure 6 It is a schematic diagram of the structure of the seal provided in some embodiments of the present application.

[0022] Tag Name:

[0023] Sealing box 10; sealing chamber 11; wall 12; adjustment port 13; box body 14; box cover 15; clamping member 20; first clamp 21; second clamp 22; base 23; first clamp block 24; second clamp block 25; recess 251; handle 26; limiting groove 27; bottom wall 271; side wall 272; slot 28; auxiliary clamping part 29; first clamping component 291; second clamping component 292; tension test piece 30; pull rod 31; dynamometer 32; sample 40; sealing member 50; sealing group 51; elastic sealing pad 52; incision 521; slit 522; pressing pad 53; guide member 60; slide rail 61; slider 63; clamping surface S1; first direction X; second direction Y; third direction Z. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0026] Figure 1 A schematic diagram of the structure of a tensile testing device provided in some embodiments of the present application, Figure 2 is a partial top view of a tensile testing device provided in some embodiments of the present application, Figure 3 It is a partial side view of the tensile testing device provided in some embodiments of the present application.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, in the first aspect, an embodiment of the present application provides a tensile testing device, including a sealing box 10, a clamping member 20 and a tensile testing member 30, the sealing box 10 includes a wall portion 12 enclosing a sealing cavity 11, and an adjustment port 13 is provided on the wall portion 12 for adjusting the environment in the sealing cavity 11; the clamping member 20 is arranged in the sealing cavity 11, and includes a first clamp 21 and a second clamp 22 for clamping a sample 40 respectively, and the second clamp 22 is movably arranged along a first direction X; at least a part of the tensile testing member 30 is arranged in the sealing cavity 11, for detecting the tensile force exerted on the sample 40; the first direction X is the direction in which the second clamp 22 approaches or moves away from the first clamp 21.

[0028] It should be clear that the sample 40 tested by the tensile testing device in the present application can be a finished product of each component to be tested, or a sample 40 of a preset shape made of the material of each component to be tested. The tensile testing device in the present application can be used to test samples 40 in the field of medical devices such as medical sheaths and medical catheters, and can also be used to test samples 40 in any other field that require tensile testing.

[0029] The first direction X is the direction in which the second clamp 22 approaches or moves away from the first clamp 21, and may also be any one of the length direction and width direction of the first clamp 21 or the second clamp 22, and it is also the length direction of the sample 40. The sealed box 10 may include a box body 14 and a box cover 15 that can be opened and closed on the box body 14, the box body 14 and the box cover 15 respectively include a part of the wall portion 12, when the box body 14 and the box cover 15 are sealed, the wall portion 12 of the box body 14 and the box cover 15 are enclosed to form a sealed cavity 11, wherein the box body 14 and the box cover 15 can be sealed by a sealing gasket, and the regulating port 13 can be provided on the box body 14. The regulating port 13 may include an opening formed on the wall portion 12 and a valve provided at the opening, and the valve may allow a medium such as gas or liquid to pass through, so as to adjust the environment in the sealed cavity 11, so that the clamping member 20 in the sealed cavity 11 and the sample 40 clamped by the clamping member 20 are in a corresponding environment. It is understandable that the environment in the sealed cavity 11 can be various environments such as the atmospheric environment, liquid environment, and vacuum environment. That is to say, the clamping member 20 in the sealed cavity 11 and the sample 40 clamped by the clamping member 20 can be tested in various environments such as the atmospheric environment, liquid environment, and vacuum environment. For example, the sealed cavity 11 can be evacuated by adjusting the port 13 to make the environment in the sealed cavity 11 a vacuum environment; the sealed cavity 11 can be filled with a liquid medium by adjusting the port 13 to make the environment in the sealed cavity 11 a liquid environment. The liquid medium can include any liquid medium such as liquid water, and when the liquid medium is filled, the tensile properties of the sample 40 in the corresponding liquid environment can be tested by controlling the liquid medium to immerse the clamping member 20 and the sample 40 clamped by the clamping member 20, without filling the entire sealed cavity 11 with the liquid medium, so as to save costs. Of course, the environment in the sealed cavity 11 can also be an environment filled with other gaseous media, which is not limited in this embodiment.

[0030] During the test, the box cover 15 can be opened first and the sample 40 can be clamped by the first clamp 21 and the second clamp 22 respectively, and then the environment in the sealed cavity 11 can be adjusted. After the adjustment is completed, one end of the sample 40 can be driven by the second clamp 22 to move along the first direction X toward the side away from the first clamp 21, and the sample 40 can be pulled until the sample 40 is broken. In this process, the tension detection member can detect the tension on the sample 40, so as to analyze the tensile properties of the sample 40. In addition, when the environment in the sealed cavity 11 is an atmospheric environment or a liquid environment, the box cover 15 can be opened and the sample 40 can be installed on the clamp 20 and can be kept in an open state without being covered with the box body 14 for observation; and when the environment in the sealed cavity 11 is a vacuum environment or an environment filled with other gas media, the box cover 15 needs to be closed with the box body 14 after the sample 40 is installed on the clamp 20, so that the sealed cavity 11 is in a sealed state.

[0031] The tensile testing device provided in this embodiment includes a sealed box 10, a first clamp 21, a second clamp 22 and a tensile testing piece 30. The sealed box 10 includes a wall portion 12 enclosing a sealed cavity 11. The first clamp 21 and the second clamp 22 are both arranged in the sealed cavity 11. The second clamp 22 is movably arranged along a first direction X. The first direction X is the direction in which the second clamp 22 approaches or moves away from the first clamp 21. Therefore, by clamping the sample 40 by the first clamp 21 and the second clamp 22 respectively, and moving the second clamp 22 along the first direction X toward a side away from the first clamp 21, the sample 40 can be pulled until the sample 40 is broken. In this process, the tensile testing piece 30 can detect the tensile force exerted on the sample 40, and then analyze and obtain the tensile performance of the sample 40. At the same time, since an adjustment port 13 is provided on the wall portion 12 of the sealed box 10 for adjusting the environment in the sealed cavity 11, the sample 40 can be tested in different environments to compare and analyze the tensile performance of the sample 40 in different environments, thereby improving the reliability of the test.

[0032] In addition, in this embodiment, the first clamp 21 and the second clamp 22 clamp the sample 40 and pull the sample 40, so that the position where the sample 40 is torn can be controlled to a certain extent.

[0033] Optionally, there may be a plurality of regulating ports 13 , and the plurality of regulating ports 13 are arranged at intervals to improve the efficiency of regulating the environment in the sealed cavity 11 .

[0034] In some embodiments, the tensile testing device also includes at least one of a vacuum pumping mechanism, a gas injection mechanism, and a liquid injection mechanism, and at least one of the vacuum pumping mechanism, the gas injection mechanism, and the liquid injection mechanism is connected to the adjustment port 13, so that the environment in the sealing cavity 11 can be quickly and conveniently adjusted through the adjustment port 13.

[0035] The vacuuming mechanism, gas injection mechanism and liquid injection mechanism can be connected to the same regulating port 13 at the same time, or when there are multiple regulating ports 13, the vacuuming mechanism, gas injection mechanism and liquid injection mechanism can be connected to different regulating ports 13 respectively to reduce mutual interference.

[0036] Figure 4 It is a schematic diagram of the structure of the first clamp 21 and / or the second clamp 22 provided in some embodiments of the present application.

[0037] like Figure 2 and Figure 4 As shown, in some embodiments, at least one of the first clamp 21 and the second clamp 22 includes a base 23 and a first clamp block 24 and a second clamp block 25 disposed on the base 23, the first clamp block 24 and the second clamp block 25 are spaced apart along the second direction Y, and the second clamp block 25 is movably disposed along the second direction Y, and the second direction Y is intersected with the first direction X.

[0038] When the first direction X is one of the length direction and the width direction of the first clamp 21, the second direction Y can be the other direction, or the second direction Y can also be the height direction of the first clamp 21, which is not limited in this embodiment, and it only needs to intersect with the first direction X. The first clamp 21 and the second clamp 22 can have the same structure, both of which include the base 23, the first clamp block 24 and the second clamp block 25; or the first clamp 21 and the second clamp 22 can also have different structures, one of which includes the base 23, the first clamp block 24 and the second clamp block 25, and the other can be other types of clamps such as claws, which is not limited in this embodiment.

[0039] In this embodiment, the first clamp 24 and the second clamp 25 are arranged on the base 23 at intervals along the second direction Y, and the second clamp 25 is movably arranged along the second direction Y. Therefore, by placing the sample 40 between the first clamp 24 and the second clamp 25, and moving the second clamp 25 along the second direction Y toward the side close to the first clamp 24, the sample 40 can be clamped along the second direction Y. The structure is simple and the operation is convenient.

[0040] In addition, various types of samples 40 can be clamped by the first clamp 21 and the second clamp 22, so that various types of samples 40 can be tested, which can improve the application range of the tensile testing device.

[0041] It can be understood that after the first clamp 24 and the second clamp 25 clamp the sample 40 along the second direction Y, by moving the base 23 of the second clamp 22 along the first direction X toward the side away from the first clamp 21, the sample 40 can be pulled along the first direction X to test the sample 40.

[0042] Please continue to refer to Figure 4In some embodiments, at least one of the first clamp 21 and the second clamp 22 further includes an adjustment handle 26, which extends along the second direction Y and is connected to the second clamp block 25. The adjustment handle 26 is threadedly connected to the base 23. Therefore, by rotating the adjustment handle 26, the adjustment handle 26 can be moved along the second direction Y, thereby driving the second clamp block 25 to move along the second direction Y, which can improve the stability of the second clamp block 25 moving along the second direction Y.

[0043] It can be understood that an external thread can be formed on the adjustment handle 26, and a mounting portion can be provided on the base 23. The mounting portion has a through hole along the second direction Y, and an internal thread is formed on the inner wall of the through hole. The adjustment handle 26 passes through the through hole, and the external thread on it engages with the internal thread on the inner wall of the through hole, thereby realizing a threaded connection between the adjustment handle 26 and the base 23.

[0044] Please continue to refer to Figure 4 In some embodiments, the base 23 forms a limiting groove 27, the limiting groove 27 includes a bottom wall 271 and side walls 272 arranged on opposite sides of the bottom wall 271 along the first direction X, the second clamping block 25 is clamped in the limiting groove 27 and slidably arranged relative to the limiting groove 27 along the second direction Y, wherein the second clamping block 25 abuts against the side walls 272 on both sides along the first direction X.

[0045] The first clamping block 24 is located on one side of the limiting groove 27 along the second direction Y. When the second clamping block 25 is clamped in the limiting groove 27, the two sides thereof along the first direction X respectively abut against the side walls 272. Therefore, in the process of the second clamping block 25 moving along the second direction Y, the side walls 272 arranged on the opposite sides of the bottom wall 271 along the first direction X can guide the second clamping block 25, thereby improving the stability of the second clamping block 25.

[0046] It can be understood that when the base 23 forms a limiting groove 27, the mounting portion for allowing the adjustment handle 26 to pass through can be set on the bottom wall 271 of the limiting groove 27, which is located on the side of the second clamp 25 away from the first clamp 24 along the second direction Y, and is separated from the first clamp 24 by a preset distance. Therefore, by rotating the adjustment handle 26, the second clamp 25 can be driven to move along the second direction Y between the first clamp 24 and the mounting portion.

[0047] Please continue to refer to Figure 4Optionally, the second clamping block 25 is provided with recesses 251 on both sides along the first direction X, and the recesses 251 are provided near the bottom wall 271 of the limiting groove 27 along the third direction Z. The recesses 251 include a first wall surface and a second wall surface connected to each other, and the plane where the first wall surface is located intersects with the plane where the second wall surface is located, and the second wall surface is located on the side of the first wall surface away from the bottom wall 271 of the limiting groove 27 along the third direction Z. When the second clamping block 25 is clamped in the limiting groove 27, the first wall surface abuts against the side wall 272 of the limiting groove 27 along the first direction X, and the second wall surface abuts against the side wall 272 of the limiting groove 27 along the third direction Z, so that the second clamping block 25 can also be limited along the third direction Z through the limiting groove 27 to further improve the stability of the second clamping block 25.

[0048] It should be clear that the third direction Z in the present application is perpendicular to the first direction X, and the third direction Z can also be perpendicular to the second direction Y. The first direction X, the second direction Y and the third direction Z can correspond one by one to the length direction, the width direction and the height direction of the first clamp 21.

[0049] Please continue to refer to Figure 4 In some embodiments, the second clamping block 25 has a clamping surface S1 on one side facing the first clamping block 24, and the clamping surface S1 is formed with a slot 28 extending along at least one direction of the first direction X and the third direction Z, and the slot 28 is used to clamp the sample 40, and the third direction Z is perpendicular to the first direction X.

[0050] The slot 28 is formed by the clamping surface S1 being recessed along the second direction Y toward one side away from the first clamping block 24. When the slot 28 extends along the first direction X and the third direction Z at the same time, the slot 28 may include a first sub-slot extending along the first direction X and a second sub-slot extending along the third direction Z. It is understandable that when the sample 40 is clamped in the slot 28 extending in any one direction of the first direction X and the third direction Z, the side wall surface of the slot 28 in the other direction of the first direction X and the third direction Z may abut against the sample 40 to limit the position of the sample 40. The shape of the slot 28 may be reasonably set in practical applications. For example, the slot 28 may be a V-shaped slot, that is, the slot 28 includes two side wall surfaces, the two side wall surfaces intersect and the angle between the two is less than 90°. When the sample 40 is clamped in the slot 28, the two side wall surfaces may abut against the sample 40 respectively to limit the position of the sample 40.

[0051] In this embodiment, the second clamp 25 is provided with a clamping surface S1 on one side facing the first clamp 24, and a slot 28 extending along at least one of the first direction X and the third direction Z is formed on the clamping surface S1. Therefore, a sample 40 in a cylindrical or long strip shape can be clamped through the slot 28, thereby improving the stability of such sample 40 before being clamped between the first clamp 24 and the second clamp 25.

[0052] Figure 5 It is another structural schematic diagram of the first clamp 21 and / or the second clamp 22 provided in some embodiments of the present application.

[0053] like Figure 5 As shown, in some embodiments, at least one of the first clamp 21 and the second clamp 22 also includes an auxiliary clamping portion 29, the auxiliary clamping portion 29 includes a first clamping component 291 and a second clamping component 292, the first clamping component 291 is detachably disposed on the first clamp block 24, and the second clamping component 292 is detachably disposed on the second clamp block 25.

[0054] In this embodiment, the first clamping component 291 is detachably disposed on the first clamping block 24, and the second clamping component 292 is detachably disposed on the second clamping block 25, so that the first clamping block 24 and the second clamping block 25 can cooperate to clamp the sample 40 when necessary, thereby improving the reliability of the sample 40 when being clamped.

[0055] It is understandable that when the shape of the sample 40 is irregular, it may shake when clamped by the first clamp 24 and the second clamp 25. At this time, a first clamping component 291 is provided on the first clamp 24, and a second clamping component 292 is provided on the second clamp 25, so that the first clamp 21 and the second clamp 22 can be assisted by the first clamp 291 and the second clamp 292 to clamp the sample 40.

[0056] Optionally, the ends of the first clamp block 24 and the second clamp block 25 away from the base 23 along the third direction Z can be recessed toward the side close to the base 23 to form installation grooves, and the first clamping part 291 and the second clamping part 292 can be respectively inserted into the corresponding installation grooves to achieve a detachable connection with the first clamp block 24 and the second clamp block 25. The structure is simple and easy to disassemble and assemble.

[0057] In some embodiments, at least one of the first clamping member 291 and the second clamping member 292 is movably disposed along the first direction X, so that by adjusting the position of the first clamping member 291 and / or the second clamping member 292 along the first direction X, the first clamping member 291 and the second clamping member 292 can be clamped at a suitable position of the sample 40, thereby further improving the stability of the sample 40 when being clamped.

[0058] It can be understood that when the ends of the first clamp block 24 and the second clamp block 25 away from the base 23 along the third direction Z can be respectively recessed toward the side close to the base 23 to form installation grooves, and the first clamping part 291 and the second clamping part 292 are respectively inserted into the corresponding installation grooves, the number of installation grooves on the first clamp block 24 and the second clamp block 25 can be multiple, and the multiple installation grooves on the corresponding clamps are arranged at intervals along the first direction X. Therefore, by inserting the first clamping part 291 and the second clamping part 292 into different installation grooves, position adjustment along the first direction X can be achieved.

[0059] Furthermore, in order to further improve the stability of the sample 40 when it is clamped, the number of the auxiliary clamping parts 29 can also be multiple, wherein the first clamping parts 291 and the second clamping parts 292 of the multiple auxiliary clamping parts 29 are respectively arranged at intervals along the first direction X, so that the first clamping block 24 and the second clamping block 25 are assisted by the multiple auxiliary clamping parts 29 to clamp the sample 40.

[0060] Please continue to refer to Figure 2 and Figure 3 In some embodiments, the tensile test piece 30 includes a pull rod 31 and a tensile gauge 32, the pull rod 31 passes through the wall 12 along the first direction X, wherein part of the pull rod 31 is located in the sealed cavity 11 and is connected to the second clamp 22, and the remaining part of the pull rod 31 is located outside the sealed box 10 and is connected to the tensile gauge 32. The tensile gauge 32 pulls the second clamp 22 to move along the first direction X through the pull rod 31, so that the tensile force on the sample 40 can be intuitively observed through the tensile gauge 32 during the process of pulling the second clamp 22 to move. The structure is simple and the operation is convenient.

[0061] Please continue to refer to Figure 2 and Figure 3 In some embodiments, the tensile testing device also includes a seal 50 arranged on the wall portion 12, and the pull rod 31 passes through the wall portion 12 and the seal 50 respectively along the first direction X to reduce the influence of the pull rod 31 on the sealing performance in the sealing cavity 11 when passing through the wall portion 12, thereby improving the sealing reliability in the sealing cavity 11.

[0062] Figure 6 It is a schematic diagram of the structure of the seal 50 provided in some embodiments of the present application.

[0063] like Figure 6As shown, in some embodiments, the seal 50 includes a sealing group 51 and a fastener, the sealing group 51 includes an elastic sealing pad 52 and a pressing pad 53 stacked along a first direction X, the pressing pad 53 is located on the side of the elastic sealing pad 52 away from the wall portion 12 along the first direction X, the fastener passes through the pressing pad 53, the elastic sealing pad 52 and the wall portion 12 respectively, and locks the pressing pad 53 and the elastic sealing pad 52 to the wall portion 12, and the pull rod 31 passes through the pressing pad 53, the elastic sealing pad 52 and the wall portion 12 respectively along the first direction X.

[0064] It can be understood that when the elastic sealing gasket 52 is locked to the wall portion 12 by the fastener, the elastic sealing gasket 52 may include a locking portion and a fitting portion, the projection of the locking portion on the wall portion 12 along the first direction X overlaps with the projection of the fastener on the wall portion 12 along the first direction X, the projection of the fitting portion on the wall portion 12 along the first direction X is misaligned with the projection of the fastener on the wall portion 12 along the first direction X, the fastener locks the locking portion on the wall portion 12, and the fitting portion is fitted on the wall portion 12 under the action of the locking portion, and the pull rod 31 passes through the fitting portion of the elastic sealing gasket 52 and the wall portion 12 to be inserted into the sealing cavity 11. Therefore, when the pull rod 31 is pulled along the first direction X, the pull rod 31 may drive the fitting portion of the elastic sealing gasket 52 to deform toward the side away from the wall portion 12 along the first direction X, causing the elastic sealing gasket 52 to separate from the wall portion 12, thereby affecting the sealing effect of the seal 50.

[0065] Therefore, in this embodiment, a pressing pad 53 is provided on the side of the elastic sealing pad 52 away from the wall portion 12 along the first direction X, so that the elastic sealing pad 52 is located between the pressing pad 53 and the wall portion 12, and the fasteners pass through the pressing pad 53, the elastic sealing pad 52 and the wall portion 12 respectively to lock the pressing pad 53 and the elastic sealing pad 52 to the wall portion 12. In the process of pulling the pull rod 31 along the first direction X, the pressing pad 53 can prevent the fitting part of the elastic sealing pad 52 from deforming toward the side away from the wall portion 12 under the drive of the pull rod 31, thereby preventing the elastic sealing pad 52 from separating from the wall portion 12 and ensuring the sealing effect of the seal 50.

[0066] In some embodiments, there may be a plurality of sealing groups 51 , and the plurality of sealing groups 51 are stacked along the first direction X to further improve the sealing effect of the sealing member 50 .

[0067] It should be clarified that, if multiple sealing groups 51 are stacked along the first direction X, then the elastic sealing pads 52 and compression pads 53 of the multiple sealing groups 51 are stacked in sequence along the first direction X toward the side away from the wall portion 12, that is, the elastic sealing pads 52 of the second sealing group 51 are stacked on the side of the compression pad 53 of the first sealing group 51 away from the wall portion 12, and so on, to achieve the stacking of multiple sealing groups 51 in sequence along the first direction X.

[0068] Please continue to refer to Figure 6 In some embodiments, the elastic sealing pad 52 of at least one of the multiple sealing groups 51 is formed with a cutout 521, and the cutout 521 includes a plurality of slits 522, and the plurality of slits 522 are scatteredly distributed from the center to the edge of the elastic sealing pad 52, and the pull rod 31 passes through the cutout 521, so that the seal 50 can allow pull rods 31 of various sizes to pass through, which can improve the versatility of the seal 50.

[0069] It can be understood that the multiple slits 522 are scattered from the center to the edge of the elastic sealing pad 52, that is, the extension lines of the multiple slits 522 are focused at the center of the elastic sealing pad 52, and the distance between two adjacent slits 522 gradually increases from the center to the edge of the elastic sealing pad 52.

[0070] The number of slits 522 in each elastic sealing pad 52 can be reasonably set in practical applications, and this embodiment does not limit it. For example, the number of slits 522 in an elastic sealing pad 52 can be four, and the four slits 522 are scattered from the center to the edge of the elastic sealing pad 52. In this case, the incision 521 can be approximately a cross-shaped incision 521.

[0071] Please continue to refer to Figure 2 and Figure 3 In some embodiments, the tensile testing device further includes a guide member 60 disposed in the sealed cavity 11, the guide member 60 includes a slide rail 61 and a slider 63 disposed on the slide rail 61, the slider 63 is slidably disposed relative to the slide rail 61 along the first direction X, and the slider 63 is connected to the second fixture 22, so that the second fixture 22 can be guided by the combined structure of the slide rail 61 and the slider 63 during the movement of the second fixture 22 along the first direction X, thereby reducing the difficulty of moving the second fixture 22 and preventing the second fixture 22 from positional displacement. A plurality of scale lines are disposed on the slide rail 61, and the plurality of scale lines are disposed at intervals along the first direction X.

[0072] Specifically, in the process of the second clamp 22 pulling the sample 40 along the first direction X, the length of the moving path of the second clamp 22 represents the length of the stretched sample 40. Therefore, a plurality of scale lines are set on the slide rail 61. By reading the reading of the scale line at the position of the second clamp 22 during the movement of the second clamp 22 and subtracting the reading of the scale line at the initial position of the second clamp 22, the length of the moving path of the second clamp 22 can be directly obtained, that is, the stretching length corresponding to the sample 40 can be directly obtained, so as to analyze and calculate the tensile properties of the sample 40 without removing the sample 40 and then measuring the stretching length of the sample 40, which can improve the measurement accuracy, simplify the test steps and reduce the test difficulty.

[0073] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A tensile testing device, characterized in that: include: The sealed box comprises a wall portion enclosing a sealed cavity, wherein the wall portion is provided with an adjustment port for adjusting the environment in the sealed cavity; A clamping member, disposed in the sealed cavity, and comprising a first clamp and a second clamp respectively used to clamp the sample, wherein the second clamp is movably disposed along a first direction; A tensile test piece, at least partially disposed in the sealed cavity, for detecting the tensile force exerted on the sample; The first direction is a direction in which the second clamp approaches or moves away from the first clamp.

2. The tensile testing device according to claim 1, characterized in that: The tensile testing device further includes at least one of a vacuum pumping mechanism, a gas injection mechanism and a liquid injection mechanism, and at least one of the vacuum pumping mechanism, the gas injection mechanism and the liquid injection mechanism is connected to the regulating port.

3. The tensile testing device according to claim 1, characterized in that: At least one of the first clamp and the second clamp includes a base and a first clamp block and a second clamp block arranged on the base, the first clamp block and the second clamp block are arranged at intervals along a second direction, and the second clamp block is movably arranged along the second direction, and the second direction is arranged to intersect with the first direction.

4. The tensile testing device according to claim 3, characterized in that: At least one of the first clamp and the second clamp further includes an adjustment handle, the adjustment handle extends along the second direction and is connected to the second clamp block, and the adjustment handle is threadedly connected to the base.

5. The tensile testing device according to claim 3, characterized in that: The base forms a limiting groove, which includes a bottom wall and side walls arranged on opposite sides of the bottom wall along the first direction. The second clamping block is clamped in the limiting groove and slidably arranged relative to the limiting groove along the second direction, wherein the second clamping block respectively abuts against the side walls on both sides along the first direction.

6. The tensile testing device according to claim 3, characterized in that: The second clamping block has a clamping surface on one side facing the first clamping block, and the clamping surface is formed with a slot extending along at least one of the first direction and a third direction, the slot is used to clamp the sample, and the third direction is perpendicular to the first direction.

7. The tensile testing device according to claim 3, characterized in that: At least one of the first clamp and the second clamp further includes an auxiliary clamping portion, the auxiliary clamping portion includes a first clamping component and a second clamping component, the first clamping component is detachably disposed on the first clamping block, and the second clamping component is detachably disposed on the second clamping block.

8. The tensile testing device according to any one of claims 1 to 7, characterized in that: The tensile test piece includes a pull rod and a tensile gauge, the pull rod passes through the wall portion along the first direction, wherein part of the pull rod is located in the sealed cavity and connected to the second clamp, and the remaining part of the pull rod is located outside the sealed box and connected to the tensile gauge, and the tensile gauge pulls the second clamp to move along the first direction through the pull rod.

9. The tensile testing device according to claim 8, characterized in that: The tensile testing device also includes a seal arranged on the wall portion, the seal includes a sealing group and a fastener, the sealing group includes an elastic sealing pad and a compression pad stacked along the first direction, the compression pad is located on the side of the elastic sealing pad away from the wall portion along the first direction, the fastener passes through the compression pad, the elastic sealing pad and the wall portion respectively to lock the compression pad and the elastic sealing pad to the wall portion, and the pull rod passes through the compression pad, the elastic sealing pad and the wall portion respectively along the first direction.

10. The tensile testing device according to any one of claims 1 to 7, characterized in that: The tensile testing device also includes a guide member arranged in the sealed cavity, the guide member includes a slide rail and a slider arranged on the slide rail, the slider is slidably arranged along the first direction relative to the slide rail, the slider is connected to the second clamp, and a plurality of scale lines are arranged on the slide rail, and the plurality of scale lines are spaced apart along the first direction.

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