Device for testing breaking strength of carbon material

Abstract

The utility model discloses a carbon material flexural strength testing device, which relates to the field of detection equipment, and adopts the technical scheme that the carbon material flexural strength testing device comprises a base frame which comprises a bottom frame and a vertical frame; the lower positioning unit comprises two symmetrically-arranged lower positioning assemblies, and the lower positioning assemblies are connected with the bottom frame in a sliding mode; the two lower positioning assemblies can be close to or far away from each other; the upper positioning unit comprises a lifting frame connected with the vertical frame, and the lifting frame can move towards or away from the lower positioning unit in the vertical direction; the two upper positioning assemblies are symmetrically arranged on the lifting frame, the upper positioning assemblies are connected with the lifting frame in a sliding mode, and the two upper positioning assemblies can be close to or away from each other; the upper positioning assembly is arranged towards the lower positioning assembly. The carbon material bending strength testing device has the beneficial effects that the upper positioning assembly and the lower positioning assembly of the testing device can be used for testing the four-point bending strength of a carbon material. The lifting frame can be combined with an existing downward pressing force application device to complete force application compression on a sample, and good universality is achieved.

Description

Technical Field

[0001] The utility model relates to the field of detection equipment, in particular to a carbon material flexural strength testing device. Background Art

[0002] The flexural strength of carbon materials refers to the measure of the maximum load that the material can withstand when it is bent and broken by external force. Its value is the size of the normal stress on the cross section when the sample is bent and broken. The four-point load method is to place the sample on two load-bearing blocks and add loads at their center until the sample breaks. The load is evenly distributed on the two points. The flexural strength is calculated by the load when the sample breaks, the distance between the load edge and the support point, and the diameter (height, width) of the test sample. Flexural strength is the most important indicator to characterize the strength performance of carbon materials, and is an indispensable and important data in the design of carbon products such as carbon blocks and electrodes.

[0003] Carbon materials are inorganic non-metallic, heterogeneous, brittle materials with low toughness and elasticity, and are easily broken. There are many methods for testing the flexural strength of such materials, and the difficulty lies in how to simply, quickly and accurately test the flexural strength of the sample. In addition, during the test process, the placement of the object being tested also directly affects the accuracy of the final test results. Utility Model Content

[0004] In view of one of the deficiencies of the prior art, the utility model provides a carbon material flexural strength testing device to solve the problem of simplifying the flexural strength testing method of carbon materials.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a carbon material flexural strength testing device, comprising:

[0006] A base frame, used as a basic supporting structure of the side-view device, including a bottom frame and a vertical frame;

[0007] The lower positioning unit comprises two symmetrically arranged lower positioning components, the lower positioning components are slidably connected to the bottom frame; the two lower positioning components can be close to or away from each other;

[0008] Upper positioning unit, comprising:

[0009] A lifting frame connected to the vertical frame, the lifting frame can move toward or away from the lower positioning unit in a vertical direction;

[0010] Two upper positioning assemblies are symmetrically arranged on the lifting frame. The upper positioning assemblies are slidably connected to the lifting frame. The two upper positioning assemblies can be close to or away from each other. The upper positioning assembly is arranged toward the lower positioning assembly.

[0011] Preferably, a lower positioning point corresponding to the material to be detected is provided on the upper portion of the lower positioning assembly;

[0012] An upper positioning point corresponding to the material to be detected is arranged at the lower part of the upper positioning component.

[0013] Preferably, the lower positioning unit is provided with a lower dynamic swing structure, and the lower dynamic swing structure is arranged on the lower positioning component. The lower positioning point can be rotated through the lower dynamic swing structure, and the rotation axis direction of the lower positioning point is parallel to the moving direction of the lower positioning component.

[0014] Preferably, the upper positioning unit is provided with an upper dynamic swing structure, and the upper dynamic swing structure is arranged on the upper positioning component. The upper positioning point can be rotated through the upper dynamic swing structure, and the rotation axis direction of the upper positioning point is parallel to the moving direction of the upper positioning component.

[0015] Preferably, the lower positioning assembly comprises:

[0016] A lower sliding seat, slidably connected to the base frame;

[0017] A lower support block connected to the lower slide seat;

[0018] The lower limiting member is arranged on the lower supporting block and can limit the position of the material to be tested.

[0019] Preferably, the chassis comprises:

[0020] The bottom plate is a horizontal plate structure, and a slide groove is provided on the bottom plate corresponding to the lower positioning component;

[0021] The lower scale is fixedly arranged on the bottom plate.

[0022] Preferably, the lower slide seat comprises:

[0023] A lower slide plate is arranged on the upper side of the bottom plate and is attached to the upper side of the bottom plate. The lower slide plate is slidably connected to the bottom plate through a slide groove on the bottom plate.

[0024] Two lower clamping plates are arranged on the lower sliding plate to fix the vertical plate on the lower sliding plate. A spacing is left between the two lower clamping plates, and the lower support block is arranged between the two lower clamping plates.

[0025] Preferably, a lower rotating shaft is provided through the two lower clamping plates, the lower support block is rotatably connected with the lower clamping plates through the lower rotating shaft, and the axial direction of the lower rotating shaft is parallel to the length direction of the slide groove on the bottom plate;

[0026] The lower support block, the lower rotating shaft and the lower clamping plate form the lower dynamic swing structure.

[0027] Preferably, the stand is fixedly arranged on one side of the base frame, and the lifting frame comprises:

[0028] A lifting rod is vertically slidably connected to the stand; a positioning groove is provided on the rod body of the lifting rod;

[0029] A lifting plate, the upper part of which is rotatably connected to the lower end of the lifting rod, and the lower part of which is slidably connected to the upper positioning assembly; the direction of the rotating shaft connecting the lifting plate and the lifting rod is parallel to the sliding direction of the upper positioning assembly;

[0030] The rotation connection structure of the lifting plate and the lifting rod forms the upper dynamic swing structure.

[0031] Preferably, an upper scale is provided on the lifting plate;

[0032] A return spring is arranged between the lifting rod and the stand;

[0033] The upper components include:

[0034] An upper support block, slidably connected to the lifting plate;

[0035] The upper limit member is arranged at the lower part of the upper support block and can limit the position of the material to be tested.

[0036] Compared with the prior art, the present invention has the following beneficial effects: the upper positioning assembly and the lower positioning assembly of the testing device of the present invention can realize the four-point bending strength test of carbon materials. The lifting frame can be combined with the existing downward pressure device to complete the force application on the sample, which has good versatility.

[0037] The upper positioning assembly and the lower positioning assembly of the device are respectively provided with dynamic swing structures. When testing, the dynamic swing structure helps to make adaptive adjustments according to the shape or position of the carbon material to be tested, making the determination of the flexural strength simple to operate, improving efficiency, and obtaining accurate and reliable results. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0039] Figure 2 for Figure 1 A partial enlarged view of;

[0040] Figure 3 for Figure 1 A partial enlarged view of B.

[0041] In the figure:

[0042] 1. Base frame; 11. Underframe; 12. Vertical frame; 13. Lower scale; 14. Upper scale; 2. Lower positioning unit; 21. Lower positioning assembly; 211. Lower slide seat; 212. Lower support block; 213. Lower limit member; 3. Upper positioning unit; 31. Upper positioning assembly; 311. Upper support block; 312. Upper limit member; 32. Lifting frame; 321. Lifting rod; 322. Lifting plate. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] See also Figure 1-Figure 3 , this application provides the following technical solutions:

[0045] A carbon material flexural strength test device includes a base frame 1 used as a basic support structure of a side-view device, the base frame 1 includes a bottom frame 11 and a vertical frame 12, the bottom frame 11 serves as the base structure of the entire test device, and the vertical frame 12 is located on one side of the bottom frame 11. A lower positioning unit 2 is arranged on the bottom frame 11, and the lower positioning unit 2 includes two symmetrically arranged lower positioning components 21, and the lower positioning components 21 are slidably connected to the bottom frame 11; the two lower positioning components 21 can be close to or away from each other. The upper part of the lower positioning component 21 is provided with a lower positioning point corresponding to the material to be tested; the two lower positioning components 21 are used as two lower support points in a four-point flexural test experiment of carbon materials. An upper positioning unit 3 is arranged on the vertical frame 12, and the upper positioning unit 3 includes an upper positioning component 31 and a lifting frame 32, and the lower part of the upper positioning component 31 is provided with an upper positioning point corresponding to the material to be tested, and the upper positioning component 31 is used as two upper support points in a four-point flexural test experiment of carbon materials. The lifting frame 32 is connected to the stand 12, and the lifting frame 31 can move toward or away from the lower positioning unit 2 in the vertical direction. Two upper positioning components 31 are symmetrically arranged on the lifting frame 32, and the upper positioning components 31 are slidably connected to the lifting frame 32, and the two upper positioning components 31 can move closer to or away from each other; the upper positioning component 31 is arranged toward the lower positioning component 21.

[0046] When the device is used, the upper positioning unit 3 and the lower positioning unit 2 are combined to fix the carbon material to be tested, and the positions of the upper positioning assembly 31 and the lower positioning assembly 21 are adjusted according to the actual material to be tested. After the adjustment is completed, the lifting frame 32 is forced by the existing downward pressure device until the carbon material breaks to obtain the test result. The downward pressure device can be selected from existing experimental equipment according to actual conditions, such as an electronic universal testing machine.

[0047] Based on the above implementation scheme, the lower positioning unit 2 is provided with a lower dynamic swing structure, which is arranged on the lower positioning component 21. The lower positioning point can be rotated through the lower dynamic swing structure, and the rotation axis direction of the lower positioning point is parallel to the moving direction of the lower positioning component 21.

[0048] The upper positioning unit 3 is provided with an upper dynamic swing structure, which is arranged on the upper positioning component 31 . The upper positioning point can rotate through the upper dynamic swing structure, and the rotation axis direction of the upper positioning point is parallel to the moving direction of the upper positioning component 31 .

[0049] Because the carbon material to be tested may have many different shapes, even if a part with a suitable shape is selected for testing for the convenience of the experiment, it may be difficult to fix it. This solution adopts a rotatable dynamic swing structure. When conducting the experiment, the sample is placed between the upper positioning component 31 and the lower positioning component 32. First, the sample is initially pressed down. In this process, with the help of the dynamic swing structure at the upper and lower parts, the upper positioning component 31 and the lower positioning component 21 can adapt to the position and shape of the sample by themselves. After the sample is stable, the electronic universal testing machine is controlled to descend at a certain rate to perform a flexural test.

[0050] On the basis of the above implementation scheme, the base frame 11 includes a horizontal bottom plate, which can be directly selected as a plate-shaped structure, and a slide groove is provided on the bottom plate corresponding to the lower positioning component 21; a lower scale 13 is set on the side of the bottom plate facing the user, and the specific position of the lower positioning component 21 is observed and set by the lower scale 13, which is convenient for reference when calculating the test results later.

[0051] The stand 12 includes a stand plate arranged on one side of the bottom plate, and a horizontal connection block is fixedly arranged on the upper end of the stand plate. The connection block is located above the bottom plate and is used for sliding connection with the lifting frame 32.

[0052] Based on the above implementation scheme, see Figure 2 The lower positioning assembly 21 includes a lower seat 211 slidably connected to the base frame 11, and a lower support block 212 is arranged on the lower seat 211. The lower support block 212 serves as the main support structure below the sample. A lower limiter 213 is arranged on the lower support block 212, and the material to be tested is limited and fixed by the lower limiter 213.

[0053] The lower slide seat 211 includes a lower slide plate and a lower clamping plate. The lower slide plate is arranged on the upper side of the bottom plate. The lower surface of the lower slide plate is in contact with the upper surface of the bottom plate. The lower slide plate is slidably connected to the bottom plate through the slide groove on the bottom plate. Two lower clamping plates are arranged on one side of the upper surface of the lower slide plate. The lower clamping plate is a vertical plate structure fixedly arranged on the lower slide plate. There is a gap between the two lower clamping plates. The lower support block 212 is arranged between the two lower clamping plates. Bolts are arranged through the other side of the lower slide plate body. A slider is fixedly arranged at the lower part of the bolt. The slider extends into the slide groove of the bottom plate. The slide groove with a "convex"-shaped cross section forms a sliding structure. The slider is stuck in the lower part of the slide groove. At the same time, a nut is arranged on the lower slide plate. The position of the lower slide plate on the bottom plate is fixed by screwing the nut.

[0054] On the basis of the above implementation scheme, a lower rotating shaft is set through the two lower clamping plates, and the lower support block 212 is rotatably connected to the lower clamping plate through the lower rotating shaft. The axial direction of the lower rotating shaft is parallel to the length direction of the slide groove on the bottom plate; the lower support block 212, the lower rotating shaft and the lower clamping plate form a lower dynamic swinging structure.

[0055] Through this structure, the lower support block 212 can swing around the lower rotation axis, thereby providing the lower support block 212 with a certain degree of mobility. By adapting the spacing between the lower clamping plates to the thickness of the lower support block 212, the lateral sides of the lower support block 212 can be stably supported by the lower clamping plates, and on the basis of dynamic swing, it can have sufficient stability.

[0056] On the basis of the above implementation scheme, the lifting frame 32 includes a lifting rod 321 and a lifting plate 322. The lifting rod 321 is vertically slidably connected to the stand 32; a through hole is provided on the connection block of the stand 32, and a positioning block is provided on the inner wall of the through hole toward the hole axis direction thereof, and a positioning groove is correspondingly provided on the rod body of the lifting rod 321, and the lifting rod 321 is prevented from rotating by using the positioning block and the positioning groove structure. A reset spring 33 is provided between the lifting rod 321 and the stand 12. The upper plate body of the lifting plate 322 is rotatably connected to the lower end of the lifting rod 321, and the lower side of the plate body is slidably connected to the upper positioning assembly 31; the direction of the rotating shaft connecting the lifting plate 322 and the lifting rod 321 is parallel to the sliding direction of the upper positioning assembly 31; the rotating connection structure of the lifting plate 322 and the lifting rod 321 forms an upper dynamic swing structure. An upper scale 14 is provided on the lifting plate 322, and the upper scale 14 is used to determine the position of the upper positioning assembly 31 during the experiment.

[0057] Different from the lower positioning unit 2, since the lower positioning components 21 are respectively provided with dynamic swing structures, the two upper positioning components 31 can meet the demand synchronously with the help of the upper dynamic swing structure of the lifting plate 322 without being separately provided.

[0058] Based on the above implementation scheme, see Figure 3The upper assembly 31 includes an upper support block 311 and an upper limit member 312. A slide groove is provided on the lifting plate 322 corresponding to the upper support block 311, and a through groove penetrating the lifting plate 322 is provided at the bottom of the slide groove. Bolts are provided on the upper part of the upper support block 311 in threaded connection, and the bolts extend to the inside of the slide groove of the lifting plate 322 to form a sliding structure. By rotating the bolts of the upper support block 311, the horizontal heights of the two upper support blocks 311 can be adjusted respectively, so as to facilitate fixing the sample and forming a force application point matching the shape of the sample. The upper limit member 312 is provided at the lower part of the upper support block 311, and can limit the material to be tested.

[0059] On the basis of the above implementation scheme, the lower limit member 213 and the upper limit member 312 can adopt the same structure. Here, the lower limit member 213 is explained. A screw is screwed on each side of the lower support block 212. The lower limit member 213 includes a limit rod and two limit plates located at both ends of the limit rod. A straight slot hole is opened on the limit plate, which is slidably connected with the screw through the straight slot hole, so that the distance between the limit rod and the upper surface of the lower support block 212 can be adjusted. When necessary, the limit rod and the lower support block 212 of this structure can be used to clamp the sample, and the screw is screwed to fix the limit plate, thereby achieving the position fixation of the limit rod. The upper limit member 312 has the same structure and will not be described in detail here.

[0060] On the basis of the above implementation scheme, the lower support block 212 and the upper support block 311 are both made of impact-resistant cold-working die steel (5CrW2Si), and the surfaces are mirror-polished. During the experiment, the flexural strength of carbon materials was measured according to the test steps in clause 7 of the standard GB / T3074.1-2021 "Measurement Method for Flexural Strength of Carbon Materials".

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A carbon material flexural strength testing device, characterized in that: include: A base frame (1) is used as a basic support structure of the side-view device, comprising a bottom frame (11) and a vertical frame (12); The lower positioning unit (2) comprises two symmetrically arranged lower positioning components (21), wherein the lower positioning components (21) are slidably connected to the bottom frame (11); the two lower positioning components (21) can move closer to or farther from each other; The upper positioning unit (3) comprises: A lifting frame (32) connected to the vertical frame (12), the lifting frame (32) being movable in a vertical direction toward or away from the lower positioning unit (2); Two upper positioning assemblies (31) are symmetrically arranged on the lifting frame (32); the upper positioning assemblies (31) are slidably connected to the lifting frame (32); the two upper positioning assemblies (31) can move closer to or farther from each other; and the upper positioning assemblies (31) are arranged toward the lower positioning assembly (21).

2. The carbon material flexural strength testing device according to claim 1, characterized in that: The upper portion of the lower positioning component (21) is provided with a lower positioning point corresponding to the material to be tested; An upper positioning point corresponding to the material to be detected is arranged at the lower part of the upper positioning component (31).

3. The carbon material flexural strength testing device according to claim 1, characterized in that: The lower positioning unit (2) is provided with a lower dynamic swing structure, and the lower dynamic swing structure is arranged on the lower positioning component (21). The lower positioning point can be rotated through the lower dynamic swing structure, and the rotation axis direction of the lower positioning point is parallel to the movement direction of the lower positioning component (21).

4. The carbon material flexural strength testing device according to claim 1, characterized in that: The upper positioning unit (3) is provided with an upper dynamic swing structure, and the upper dynamic swing structure is arranged on the upper positioning component (31). The upper positioning point can be rotated through the upper dynamic swing structure, and the rotation axis direction of the upper positioning point is parallel to the movement direction of the upper positioning component (31).

5. The carbon material flexural strength testing device according to claim 3, characterized in that: The lower positioning component (21) comprises: A lower sliding seat (211) is slidably connected to the base frame (11); A lower support block (212) connected to the lower sliding seat (211); The lower limiting member (213) is arranged on the lower supporting block (212) and can limit the position of the material to be tested.

6. The carbon material flexural strength testing device according to claim 5, characterized in that: The base frame (11) comprises: The bottom plate is a horizontal plate structure, and a slide groove is provided on the bottom plate corresponding to the lower positioning component (21); The lower scale (13) is fixedly arranged on the bottom plate.

7. The carbon material flexural strength testing device according to claim 6, characterized in that: The lower slide seat (211) comprises: A lower slide plate is arranged on the upper side of the bottom plate and is attached to the upper side of the bottom plate. The lower slide plate is slidably connected to the bottom plate through a slide groove on the bottom plate. Two lower clamping plates are arranged on the lower sliding plate, and a spacing is left between the two lower clamping plates for fixing the vertical plate arranged on the lower sliding plate. The lower support block (212) is arranged between the two lower clamping plates.

8. The carbon material flexural strength testing device according to claim 7, characterized in that: A lower rotating shaft is provided through the two lower clamping plates, the lower support block (212) is rotatably connected to the lower clamping plates via the lower rotating shaft, and the axial direction of the lower rotating shaft is parallel to the length direction of the sliding groove on the bottom plate; The lower support block (212), the lower rotating shaft and the lower clamping plate form the lower dynamic swing structure.

9. The carbon material flexural strength testing device according to claim 4, characterized in that: The lifting frame (32) comprises: A lifting rod (321) vertically slidably connected to the stand (12); A lifting plate (322), the upper part of which is rotatably connected to the lower end of the lifting rod (321), and the lower part of which is slidably connected to the upper positioning assembly (31); the direction of the rotation axis connecting the lifting plate (322) and the lifting rod (321) is parallel to the sliding direction of the upper positioning assembly (31); The rotational connection structure of the lifting plate (322) and the lifting rod (321) forms the upper dynamic swing structure.

10. The carbon material flexural strength testing device according to claim 9, characterized in that: An upper scale (14) is provided on the lifting plate (322); A return spring (33) is provided between the lifting rod (321) and the stand (12); The upper positioning component (31) comprises: An upper support block (311) is slidably connected to the lifting plate (322); The upper limit member (312) is arranged at the lower part of the upper support block (311) and can limit the position of the material to be tested.

Images