Sample brittle failure device

Abstract

The invention discloses a sample brittle failure device. The device comprises a shell; the sample tank is arranged on the shell and is used for containing a sample; the impact part is connected with the shell and is positioned right above the opening of the sample groove; and the control part is connected with the shell, is positioned right above the impact part, and is used for controlling the impact part to be fixed or fall. Wherein the impact part comprises an elastic piece, the elastic piece is in a compressed state when the impact part is fixed, the elastic piece is in a released state when the impact part falls, and the elastic force direction of the elastic piece is parallel to the falling direction of the impact part. The elastic piece provides power for the impact piece under the action of self elasticity, and the impact strength of the impact piece can be accurately controlled by adjusting the compression state of the elastic piece, so that the brittle fracture section sample preparation stability is ensured, and the accuracy of a composite fiber material detection result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sample preparation, and in particular to a sample brittle fracture device. Background Art

[0002] Composite fiber materials (especially carbon fiber composite materials) have been widely used in wind power, aerospace and other industrial fields due to their light weight and high strength. During the manufacturing process of composite fiber materials, the internal structure of the composite fiber is constantly changing, so that the composite fiber at different production stages has different chemical structures. Therefore, observing its chemical structure is an important part of the detection of composite fiber materials. Among them, observing the brittle fracture section of the composite fiber is one of the most common detection methods. However, the current sample preparation method for the brittle fracture section of composite fibers is still not mature enough, and the sample preparation stability is poor, which seriously affects the test results. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present invention provides a sample brittle fracture device.

[0004] The sample brittle fracture device provided by the present invention comprises:

[0005] case;

[0006] A sample slot is provided on the housing and is used to hold a sample;

[0007] An impact part connected to the housing, the impact part being located just above the opening of the sample slot;

[0008] A control unit connected to the housing, the control unit is located directly above the impact unit, and the control unit is used to control the impact unit to be fixed or dropped;

[0009] Wherein, the impact part comprises an elastic member, the elastic member is in a compressed state when the impact part is fixed, and the elastic member is in a released state when the impact part falls, and the elastic force direction of the elastic member is parallel to the falling direction of the impact part.

[0010] In some embodiments, the impact portion further comprises:

[0011] An impact part body, the elastic member is mounted on the impact part body;

[0012] A pointed tip, arranged at one end of the impact part body facing the sample slot;

[0013] A limit block is fixedly connected to the impact part body, and when the impact part is fixed, the limit block cooperates with the shell to compress the elastic part;

[0014] A connecting piece is arranged at one end of the impact part body away from the sample slot, and the connecting piece can be connected to or separated from the control part.

[0015] In some embodiments, the elastic member is detachably mounted on the impact portion body.

[0016] In some embodiments, the connector includes a ferromagnetic member;

[0017] The control unit includes an electromagnet and an electromagnet switch, wherein the electromagnet switch is used to control the power on and power off of the electromagnet. When the electromagnet is powered on, the ferromagnetic component is connected to the electromagnet, and when the electromagnet is powered off, the ferromagnetic component is separated from the electromagnet.

[0018] In some embodiments, the shell includes a top cover having an opening, the impact portion body passes through the opening and is slidably connected to the top cover, the limit block and the top cover are respectively located at two ends of the elastic member in the direction of the elastic force, and the size of the opening is smaller than the size of the elastic member.

[0019] In some embodiments, the shell further includes a bracket, the bracket is connected to the top cover and is located above the opening, and the control unit is mounted on the bracket.

[0020] In some embodiments, the housing is provided with a first positioning groove, and the first positioning groove is used to locate the installation position of the top cover; and / or,

[0021] The housing is provided with a second positioning groove, and the second positioning groove is used to locate the installation position of the sample slot.

[0022] In some embodiments, a containing space is formed inside the shell, the sample slot is disposed in the containing space, a groove is disposed at the bottom of the sample slot, and the impact member is located directly above the groove.

[0023] In some embodiments, the sample brittle fracture device further includes an ultrasonic part, which is disposed on one side of the sample slot and is used to add ultrasonic vibration to the sample in the sample slot;

[0024] The ultrasonic part includes an ultrasonic generator and at least one ultrasonic transmitting end. The ultrasonic generator is connected to the shell and is used to generate ultrasonic waves. The ultrasonic transmitting end is connected to the ultrasonic generator and is used to transmit the ultrasonic waves to the sample tank.

[0025] In some embodiments, the ultrasonic part includes a plurality of ultrasonic emitting ends, and each of the ultrasonic emitting ends faces the sample slot.

[0026] The beneficial effects of the present invention are:

[0027] In the sample brittle fracture device provided by the present invention, the elastic part provides power to the impact part through its own elastic force, and by adjusting the compression state of the elastic part, the impact force of the impact part can be accurately controlled, thereby ensuring the stability of the brittle fracture section sample preparation and improving the accuracy of the composite fiber material detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a schematic diagram of a sample brittle fracture device according to an exemplary embodiment;

[0030] Figure 2 is a schematic diagram of an impact portion according to an exemplary embodiment;

[0031] Figure 3 is a schematic diagram of a top cover and a control unit according to an exemplary embodiment;

[0032] Figure 4 FIG. 4 is a schematic diagram of a bottom plate, a sample slot and an ultrasonic part according to an exemplary embodiment.

[0033] In the figure: 1-shell; 11-top cover; 111-opening; 12-bottom plate; 13-side wall; 131-second protrusion; 14-bracket; 2-sample slot; 21-groove; 3-impact part; 31-elastic member; 32-impact part body; 33-pointed head; 34-limiting block; 35-connecting part; 4-control part; 41-electromagnet; 42-electromagnet switch; 5-ultrasonic part; 51-ultrasonic generator; 52-ultrasonic transmitting end. DETAILED DESCRIPTION

[0034] In the past, when preparing the brittle fracture section of composite fibers, the operation is often to first place the sample in liquid nitrogen, and then the operator clamps the two ends of the sample with an instrument, and quickly breaks it after taking it out of the liquid nitrogen. However, this sample preparation method cannot avoid the temperature change after the sample is taken out, and it is difficult to reach the brittle fracture temperature. It is easy to have incomplete brittle fracture, resulting in the closure of the fibers in the brittle fracture section and uneven cross-section. In addition, the operation is cumbersome and there are safety risks such as liquid nitrogen frostbite and splashing of sample residues.

[0035] In the related art, the device for preparing brittle fracture sections is usually provided with an impact piece and a storage space for containing liquid nitrogen. When the sample is in liquid nitrogen, the operator can prepare the brittle fracture section by impacting the sample with the impact piece, which can ensure the stability of the brittle fracture temperature of the sample. However, in such devices, the impact piece is usually only set as a straight rod, and there is a lack of relevant power components or control components of the impact piece, so it is difficult to effectively control the impact process. For example, the impact force or impact direction of the impact piece may be different during each sample preparation process, which makes the sample preparation stability of the brittle fracture section poor, and thus interferes with the test results.

[0036] In order to solve the above problems, an embodiment of the present invention provides a sample brittle fracture device, comprising: a shell; a sample slot, which is arranged on the shell and is used to hold the sample; an impact part, which is connected to the shell and is located directly above the opening of the sample slot; a control part, which is connected to the shell and is located directly above the impact part, and the control part is used to control the fixing or falling of the impact part. Among them, the impact part includes an elastic part, and the elastic part is in a compressed state when the impact part is fixed, and is in a released state when the impact part falls, and the elastic force direction of the elastic part is parallel to the falling direction of the impact part. The elastic part provides power to the impact part through its own elastic force. By adjusting the compression state of the elastic part, the impact force of the impact part can be accurately controlled, thereby ensuring the stability of the brittle fracture section sample preparation and improving the accuracy of the composite fiber material detection results.

[0037] The technical scheme in the embodiment of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present invention.

[0038] like Figure 1 As shown, this embodiment provides a sample brittle fracture device, including a housing 1, a sample slot 2, an impact part 3 and a control part 4. The style and material of the housing 1 can be set according to actual conditions, and its style can be, for example, an enclosing structure (refer to Figure 1 ), and its material can be, for example, stainless steel or other ultra-low temperature resistant materials, without limitation.

[0039] The sample slot 2 is arranged on the housing 1. For example, the sample slot 2 can be a separate structure from the housing 1, so that the sample slot 2 can be removed from the housing 1 at any time for cleaning and replacement. For another example, the sample slot 2 can also be integrally formed with the housing 1, and there is no restriction on this. The sample slot 2 has a storage space for containing the sample and liquid nitrogen, so that the sample can be directly brittle fractured in the ultra-low temperature environment provided by the liquid nitrogen, and the temperature is kept stable so that the brittle fracture is more thorough, which is conducive to observing the morphology of the brittle fracture section.

[0040] The impact part 3 is connected to the housing 1 and is used to impact the sample in the sample slot 2 so as to produce a brittle fracture section of the sample. The opening of the sample slot 2 faces upward, and the impact part 3 is located directly above the opening of the sample slot 2 (i.e., in the opposite direction of gravity), ensuring that the impact part 3 can accurately hit the sample in the sample slot 2, while avoiding the impact part 3 from generating velocity components in other directions when impacting the sample, thereby affecting the impact strength.

[0041] The control unit 4 is also connected to the housing 1 and is used to control the fixing or falling of the impact unit 3. The control form of the control unit 4 can be, for example, mechanical control, or electromagnetic control, or other forms, which are not limited. The control unit 4 is located directly above the impact unit 3, so that the impact unit 3 can be separated from the control unit 4 when it falls, so as to avoid the control unit 4 interfering with the falling process of the impact unit 3.

[0042] refer to Figure 1 and Figure 2 , the impact part 3 includes an elastic member 31, which has elasticity itself and will generate an elastic force in the opposite direction of being compressed when it is in a compressed state. When the impact part 3 is fixed, the elastic member 31 is in a compressed state, and when the impact part 3 falls, the elastic member 31 is in a released state. When the control unit 4 controls the impact part 3 to change from a fixed state to a falling state, the elastic member 31 correspondingly changes from a compressed state to a released state, and the elastic force does work on the impact part 3 and is converted into the kinetic energy of the impact part 3. Since the magnitude of the elastic force is proportional to the degree of compression of the elastic member 31, by adjusting the compression state of the elastic member 31, it is possible to achieve precise control of the impact force of the impact member 31, thereby ensuring the stability of the brittle fracture section sample preparation and improving the accuracy of the composite fiber material test results. At the same time, the elastic force direction of the elastic member 31 is parallel to the falling direction of the impact part 3 (that is, the gravity direction), which can avoid the impact part 3 from generating velocity components in other directions and ensure that the impact part 3 falls straight. The elastic member 31 can be in the form of a spring, an elastic telescopic column, a bellows, etc., for example, and there is no limitation on this.

[0043] In one embodiment, if Figure 2 As shown, the impact part 3 also includes an impact part body 32, a pointed head 33, a stopper 34 and a connecting member 35. The elastic member 31 is installed on the impact part body 32. The style of the impact part body 32 and the matching form with the elastic member 31 are set according to actual conditions. Figure 2 ), the impact part body 32 is cylindrical, and the elastic member 31 is in the form of a spring and is sleeved on the outer periphery of the impact part body 32.

[0044] The tip 33 is disposed at one end of the impact portion body 32 facing the sample slot 4 (refer to Figure 1), that is, the pointed tip 33 is arranged at the lowermost end of the impact part body 32. When the impact part 3 falls, the pointed tip 33 impacts the sample and causes the sample to break. The pointed tip 33 can significantly reduce the contact area between the impact part 3 and the sample during the brittle fracture, increase the pressure of the impact force on the sample, and thus facilitate direct brittle fracture of the sample. The pointed tip 33 can be, for example, a straight line shape, and its width can be set to be larger than the width of the sample so that the sample can be evenly stressed during the brittle fracture. Since the sample slot 4 contains liquid nitrogen, the pointed tip 33 can be made of a material with high rigidity and ultra-low temperature resistance, such as stainless steel.

[0045] In addition, since the tip 33 is located at the bottom of the impact member 3, the density or horizontal dimension of the tip 33 can be appropriately increased to move the center of gravity of the impact member 3 downward, thereby suppressing unstable factors such as shaking of the impact member 3 that may occur during the falling process. In one embodiment (not shown in the drawings), at least one first protrusion is provided on the tip 33, and the first protrusions are evenly distributed in the circumference of the tip 33 to avoid affecting the force direction of the impact member 3 due to uneven distribution of the first protrusions. In one example, the first protrusion is annular and is arranged around the outer circumference of the tip 33. In another example, a plurality of non-annular first protrusions are provided on the tip 33, and the plurality of first protrusions are equal in size and evenly distributed in the circumference of the tip 33. The specific setting shape of the first protrusion is not limited here, and for example, it can be a regular geometric shape such as a hemisphere.

[0046] The stopper 34 is fixedly connected to the impact part body 33, for example, it can be integrally formed with the impact part body 33, and the stopper 34 is used to cooperate with the shell 1 to compress the elastic member 31 when the impact part 3 is fixed. Figure 1 and Figure 2 The limit block 34 and the shell 1 can be connected to the two ends of the elastic member 31 respectively, and the elastic member 31 can be compressed by changing the distance between the limit block 34 and the shell 1 in the vertical direction.

[0047] The connecting member 35 is disposed at one end of the impact portion body 32 away from the sample slot 4 (refer to Figure 1 ), that is, the connecting member 35 is disposed at the uppermost end of the impact part body 32. As mentioned above, the control part 4 is located directly above the impact part 3, so the control part 4 can control the impact part 3 through the connecting member 35. When the connecting member 35 is connected to the control part 4, the impact part 3 is in a fixed state, and when the connecting member 35 is separated from the control part 4, the impact part 3 is in a falling state.

[0048] For composite fiber materials under different processes, the appropriate impact strength at the time of brittle fracture is also different. As mentioned above, by adjusting the compression state of the elastic member 31, the impact strength of the impact member 3 can be accurately controlled, but for a single elastic member 31, its adjustment space is relatively small and may not meet the impact strength requirements corresponding to multiple processes. Therefore, the control range of the device on the impact strength of the impact member 3 can be further expanded by replacing the elastic member 31 with different elastic coefficients.

[0049] In one embodiment, the elastic member 31 is detachably mounted on the impact portion body 32, and when an elastic member 31 with a different elastic coefficient is needed, it can be replaced in time. Figure 2 ), the elastic member 31 is in the form of a spring, and the stopper 34 or the connecting member 35 is threadedly connected to the impact part body 32, so as to facilitate the replacement of the elastic member 31. In another example (not shown in the drawings), the elastic member 31 is an elastic telescopic column with an opening on the side, and the elastic member 31 can be directly removed and installed through the side opening. Of course, the elastic member 31 can also be installed in other forms, which is not limited to this.

[0050] In one embodiment, if Figure 1 and Figure 3 As shown, the control unit 4 includes an electromagnet 41 and an electromagnet switch 42, and the electromagnet switch 42 is electrically connected to the electromagnet 41 and controls the power on and off of the electromagnet 41. The connector 35 of the impact part 3 includes a ferromagnetic part (not shown in the drawings). When the electromagnet switch 42 is turned on, the electromagnet 41 is energized, and the electromagnet 41 can generate a magnetic field, so that the ferromagnetic part and the electromagnet 41 are attracted to each other based on the magnetic field and connected, and thus the impact part 3 is in a fixed state. When the electromagnet switch 42 is closed, the electromagnet 41 is powered off, and the magnetic field of the electromagnet 41 disappears, and the ferromagnetic part and the electromagnet 41 lose suction and separate, and thus the impact part 3 falls. The control unit 4 of this form is used to control the fall of the impact part 3 by controlling whether there is a magnetic field on the electromagnet 41. Compared with the traditional mechanical control form, it can significantly reduce the shaking generated when the impact part 3 falls, and reduce the impact angle deviation of the impact part 3 during each sample preparation process.

[0051] In one embodiment (not shown in the drawings), the control unit 4 also includes a control component, which is electrically connected to the electromagnet 41 and is used to adjust the current of the electromagnet 41, and can further adjust the magnitude of the magnetic field generated by the electromagnet 41. Since the ferromagnetic part and the electromagnet 41 attract each other based on the magnetic field, when the magnitude of the magnetic field of the electromagnet 41 changes, the magnitude of the electromagnetic attraction between the ferromagnetic part and the electromagnet 41 changes accordingly. When the impact member 3 is in a fixed state and is not in direct contact with the electromagnet 41 (that is, when the impact member 3 is in a suspended state), according to the force balance, the magnitude of the electromagnetic attraction it receives is equal to the sum of its own weight and the elastic force of the elastic member 31, so when the electromagnetic attraction changes, the magnitude of the elastic force of the elastic member 31 also changes accordingly, so that the impact member 3 can brittlely break the sample with different impact forces. Thus, the control of the impact force of the impact member 3 can be achieved through the control component.

[0052] In addition, since the elastic member 31 is usually a consumable, its elastic coefficient will gradually decrease after multiple uses, resulting in a weakening of the elastic force of the elastic member 31 under the same compression state. Therefore, in some embodiments (not shown in the drawings), in order to ensure the accuracy of the elastic force of the elastic member 31, a control center is also provided in the control unit 4, which can be used to count and store the attenuation relationship of the elastic force of different types of elastic members 31 according to the number of compressions. The control center is connected to the control component, and in actual use, instructions can be sent to the control component according to the type of elastic member 31 currently used and the number of uses, and the current on the electromagnet 41 is automatically adjusted with the number of uses of the elastic member 31 to offset the elastic force attenuation caused by the change in the elastic coefficient of the elastic member 31.

[0053] In one embodiment, if Figure 1 and Figure 3 As shown, the housing 1 includes a top cover 11, and an opening 111 is provided on the top cover 11. The impact part body 32 passes through the opening 111 and is slidably connected to the top cover 11. The opening 111 cooperates with the electromagnet switch 41 to perform two-point positioning on the impact part 3, which can further limit the impact part 3. At the same time, the limit block 34 and the top cover 11 are respectively located at the two ends of the elastic member 31 in the elastic force direction, and the size of the opening 111 is smaller than the size of the elastic member 31, so that the elastic member 31 cannot pass through the opening 111 together with the impact part body 32. When the limit block 34 moves toward the top cover 11, the elastic member 31 can be pressed onto the top cover 11, and the limit block 34 and the top cover 11 jointly complete the compression of the limit block 31. The shape of the opening 111 can be set according to the coordination of the elastic member 31 and the impact part body 32, and there is no restriction on this. In one example, the shape of the opening 111 and the outer contour of the elastic member 31 are both circular, and the diameter of the opening 111 is smaller than the elastic member 31, so that when the elastic member 31 is compressed, the top cover 11 can apply uniform force to the circumference of the elastic member 31, thereby preventing the elastic member 31 from being skewed due to uneven force when released.

[0054] In one embodiment, continue to refer to Figure 1 and Figure 3 The housing 1 further includes a bracket 14, which is connected to the top cover 11 and is located above the opening 111. The control unit 4 is mounted on the bracket 14. The control unit 4 is fixed and positioned by the bracket 14, and can further position the impact starting position of the impact unit 3. The specific style of the bracket 14 can be set according to actual needs and is not limited to this. For example, in an example (refer to Figure 3 ), the bracket 14 may include two supporting parts and a mounting platform, the mounting platform is used to mount the control unit 4, and the two supporting parts are used to provide stable support for the mounting platform.

[0055] Since the impact part 3 is positioned by the control part 4, and the control part 4 is positioned by the bracket 14 on the top cover 11, in order to ensure that the impact part 3 can accurately hit the target position on the sample during each sample preparation process, the installation position of the top cover 11 and the sample slot 2 can also be positioned, so that the relative position of the top cover 11 and the sample slot 2 is always consistent during each sample preparation. In one embodiment, a first positioning groove is provided on the shell 1, and the first positioning groove is used to locate the installation position of the top cover 11. In one example (reference Figure 1 ), the housing 1 further comprises a plurality of side walls 13, and the side walls 13 arranged opposite to each other have a second long strip protrusion 131 extending in the horizontal direction, thereby forming a first positioning groove. In one embodiment, the housing 1 may also be provided with a second positioning groove, and the second positioning groove is used to locate the installation position of the sample slot 2. In one example (continue to refer to Figure 1 ), the shell further includes a bottom plate 12, and a second positioning groove (not shown in the drawings) is arranged on the bottom plate 12.

[0056] In one embodiment, if Figure 1 As shown, the housing 1 can form a closed structure after being assembled, and a containing space is formed inside the housing 1. The sample tank 2 is arranged in the containing space. On the one hand, it can better maintain the ultra-low temperature environment formed by the liquid nitrogen in the sample tank 2, inhibit temperature changes, and avoid liquid nitrogen frostbite accidents. On the other hand, when the sample is impacted and brittle, it can effectively prevent the sample residue from splashing and injuring people. Figure 1 and Figure 4 As shown, a groove 21 is provided at the bottom of the sample groove 2, and the impact member 3 is located directly above the groove 21. The groove 21 is conducive to bending and brittle fracture of the sample when impacted. The groove 21 can be provided in a long strip shape to help the sample form a flat brittle fracture section.

[0057] Composite fiber materials are usually materials in which reinforcing fibers are embedded in a resin system. After brittle fracture occurs, some resin debris often adheres to the brittle fracture section, and even more resin debris may cover the brittle fracture section, which seriously affects the detection of composite fiber materials. Figure 1As shown, the sample brittle fracture device is also provided with an ultrasonic part 5, which is arranged on one side of the sample tank 2 and is used to add ultrasonic vibration to the sample in the sample tank 2. When resin debris adheres to the brittle fracture section, the resin debris can be removed by ultrasonic vibration to obtain a neat brittle fracture section. Figure 4 As shown, the ultrasonic part 5 includes an ultrasonic generator 51 and at least one ultrasonic transmitting end 52. The ultrasonic generator 51 is connected to the shell 1 for generating ultrasonic waves. The ultrasonic transmitting end 52 is connected to the ultrasonic generator 51 for transmitting the ultrasonic waves generated by the ultrasonic generator 51 to the sample slot 2.

[0058] In one embodiment, if Figure 4 As shown, the ultrasonic part 5 includes a plurality of ultrasonic emitting ends 52, each of which faces the sample tank 2 to further improve the cleaning effect on the brittle fracture section. The number of ultrasonic emitting ends is set according to actual needs, for example, two ultrasonic emitting ends can be set (refer to Figure 4 ), there is no restriction on this.

[0059] The contents described in the embodiments of this specification are merely an enumeration of implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also includes equivalent technical means that can be thought of by those skilled in the art based on the inventive concept.

Claims

1. A specimen brittle fracture device, It is characterized in that The sample brittle fracture device comprises: case; A sample slot is provided on the housing and is used to hold a sample; An impact part connected to the housing, the impact part being located just above the opening of the sample slot; A control unit connected to the housing, the control unit is located directly above the impact unit, and the control unit is used to control the impact unit to be fixed or dropped; Wherein, the impact part comprises an elastic member, the elastic member is in a compressed state when the impact part is fixed, and the elastic member is in a released state when the impact part falls, and the elastic force direction of the elastic member is parallel to the falling direction of the impact part.

2. The sample brittle fracture device according to claim 1, It is characterized in that The impact portion further comprises: An impact part body, the elastic member is mounted on the impact part body; A pointed tip, arranged at one end of the impact part body facing the sample slot; A limit block is fixedly connected to the impact part body, and when the impact part is fixed, the limit block cooperates with the shell to compress the elastic part; A connecting piece is arranged at one end of the impact part body away from the sample slot, and the connecting piece can be connected to or separated from the control part.

3. The sample brittle fracture device according to claim 2, It is characterized in that The elastic member is detachably mounted on the impact portion body.

4. The sample brittle fracture device according to claim 2, It is characterized in that The connecting member includes a ferromagnetic member; The control unit includes an electromagnet and an electromagnet switch, wherein the electromagnet switch is used to control the power on and power off of the electromagnet. When the electromagnet is powered on, the ferromagnetic component is connected to the electromagnet, and when the electromagnet is powered off, the ferromagnetic component is separated from the electromagnet.

5. The sample brittle fracture device according to claim 2, It is characterized in that The shell includes a top cover, which is provided with an opening, the impact part body passes through the opening and is slidably connected to the top cover, the limit block and the top cover are respectively located at two ends of the elastic member in the elastic force direction, and the size of the opening is smaller than that of the elastic member.

6. The sample brittle fracture device according to claim 5, It is characterized in that The shell also includes a bracket, which is connected to the top cover and located above the opening, and the control unit is installed on the bracket.

7. The sample brittle fracture device according to claim 5, It is characterized in that The housing is provided with a first positioning groove, and the first positioning groove is used to locate the installation position of the top cover; and / or, The housing is provided with a second positioning groove, and the second positioning groove is used to locate the installation position of the sample slot.

8. The sample brittle fracture device according to claim 1, It is characterized in that An accommodating space is formed inside the shell, the sample slot is arranged in the accommodating space, a groove is arranged at the bottom of the sample slot, and the impact member is located directly above the groove.

9. The sample brittle fracture device according to claim 1, It is characterized in that The sample brittle fracture device further comprises an ultrasonic part, which is arranged at one side of the sample slot and is used to add ultrasonic vibration to the sample in the sample slot; The ultrasonic part includes an ultrasonic generator and at least one ultrasonic transmitting end. The ultrasonic generator is connected to the shell and is used to generate ultrasonic waves. The ultrasonic transmitting end is connected to the ultrasonic generator and is used to transmit the ultrasonic waves to the sample tank.

10. The sample brittle fracture device according to claim 9, It is characterized in that The ultrasonic part includes a plurality of ultrasonic emitting ends, and each of the ultrasonic emitting ends faces the sample slot.

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